The rise of Al is reigniting debate over whether liberal arts education still matters,and why it might matter more In her sophomore year in 2023,Mu Ting,an English major with a passion for literature,enrolled in her f...The rise of Al is reigniting debate over whether liberal arts education still matters,and why it might matter more In her sophomore year in 2023,Mu Ting,an English major with a passion for literature,enrolled in her first programming course.展开更多
The construction of new liberal arts emphasizes interdisciplinary integration and the cultivation of compound talents,providing new opportunities for the collaborative development of foreign language majors and touris...The construction of new liberal arts emphasizes interdisciplinary integration and the cultivation of compound talents,providing new opportunities for the collaborative development of foreign language majors and tourism majors in universities.The“foreign language+tourism”teaching model,by integrating the instrumental nature of language and the applied nature of tourism,aims to cultivate compound talents with both cross-cultural communication skills and practical capabilities in the tourism industry.Based on the background of new liberal arts,this paper analyzes the current status and challenges of“foreign language+tourism”teaching in universities,and proposes specific teaching paths from the dimensions of curriculum system reconstruction,teaching model innovation,faculty team optimization,and evaluation mechanism improvement,aiming to provide a theoretical reference for cultivating high-quality talents adapted to the high-quality development needs of the cultural and tourism industry.展开更多
As China’s higher education transitions from extensive expansion to intensive development,the‘New Liberal Arts’concept has emerged as a pivotal strategic direction for transforming humanities disciplines.This appro...As China’s higher education transitions from extensive expansion to intensive development,the‘New Liberal Arts’concept has emerged as a pivotal strategic direction for transforming humanities disciplines.This approach emphasizes interdisciplinary integration,parallel development of theory and practice,and optimizing talent cultivation models guided by societal demands.The diversified economic structure and high-quality development trajectory of the Guangdong-Hong Kong-Macao Greater Bay Area present new demands for talent cultivation,curriculum design,and pedagogical reform within university Human Resource Management(HRM)programs.Taking Guangzhou Huashang College as the research subject,this paper analyses the core competencies required for HRM programs under the New Liberal Arts framework through policy document analysis,literature review,and field research.It identifies shortcomings in the current curriculum system regarding knowledge structure,practical pathways,and cross-disciplinary integration.Guided by Outcome-Based Education(OBE)and Competency-Based Education(CBE)frameworks,a new curriculum architecture was designed comprising four pillars:general education and humanities literacy,professional core competencies,cross-disciplinary integration,and practical innovation.Practical explorations were undertaken in areas such as university-enterprise collaboration and industry-education integration.Preliminary outcomes demonstrate that the new scheme comprehensively enhances students’data comprehension,strategic awareness,and humanistic sensitivity,providing a reference paradigm for the high-quality development of HRM programs within the new liberal arts context.展开更多
This paper elaborates on the approaches to cultivating core competencies for college English talents under the background of New Liberal Arts,focusing on four key aspects:transmitting of Chinese culture in English to ...This paper elaborates on the approaches to cultivating core competencies for college English talents under the background of New Liberal Arts,focusing on four key aspects:transmitting of Chinese culture in English to cultivate students’cultural confidence in the context of globalization,fostering their interdisciplinary competencies through the crossover of different disciplines and knowledge fusion,utilizing big data and emerging technologies to develop students’language proficiency and autonomous learning abilities,and aligning education with societal needs by integrating theoretical learning with practical teaching,thereby enhancing students’social engagement and problem-solving skills.The study aims to advance the reform of foreign language education in the new era,enhance the competitiveness of future professionals,and guide students toward a sound personal and professional development.展开更多
Against the dual background of deepening the construction of new liberal arts and implementing the"Double Ten Thousand Plan"for first-class undergraduate courses,local universities urgently need to explore d...Against the dual background of deepening the construction of new liberal arts and implementing the"Double Ten Thousand Plan"for first-class undergraduate courses,local universities urgently need to explore distinctive curriculum construction paths.Based on the requirements of the new liberal arts connotation,this paper constructs a three-dimensional integrated framework of"value guidance,ability driven,and knowledge foundation",and takes the construction of the"Finance"course at Yangtze University as a typical case for research.When systematically analyzing the"Finance"course in the school,a three-dimensional integrated curriculum reform practice is implemented by reshaping the three-level curriculum objectives of"state-society-individual",developing teaching content that integrates"modularization-localization-cutting-edge",using the"O-PRAISE"situational teaching method,and constructing a diversified collaborative evaluation system.A first-class curriculum construction model for local universities has been summarized,which involves five collaborative approaches:"localization"of target positioning,"integration"of content construction,"contextualization"of method implementation,"value-added"evaluation orientation,and"synergy"of resource guarantee.The aim is to provide theoretical paradigms and practical solutions for similar universities to learn from,effectively solving practical difficulties such as the disconnect between value shaping and knowledge transmission,and the mismatch between talent cultivation and local needs in curriculum construction.展开更多
Marx’s"Jewish Issue"is an issue of relationship between political liberation and human liberation.Marx believed that rather than presupposing the abolition of religion and universal human liberation,politic...Marx’s"Jewish Issue"is an issue of relationship between political liberation and human liberation.Marx believed that rather than presupposing the abolition of religion and universal human liberation,political liberation is only a historical stage of human liberation,,even though with important historical progressive value. Around this theme,Marx went beyond the perspective of religious criticism and gave priority to the analysis of the modern political state in the field of civil society,lightening the limits of political liberation and the path of human liberation.展开更多
Liberal democracy cannot help America govern COVID-19 effectively for liberalism’s misunderstanding of the concept of liberty.Error-tolerantism divides liberty into the right to liberty in innovative fields,the right...Liberal democracy cannot help America govern COVID-19 effectively for liberalism’s misunderstanding of the concept of liberty.Error-tolerantism divides liberty into the right to liberty in innovative fields,the right to be wrong as an original right,and the right to be right in non-innovative ones as sub-rights;rights come from mutual empowerment among people.The major defects of liberal democracy from the perspective of error-tolerant democracy constructed on error-tolerantism are as follows:The essence of election is to transfer people’s right to be wrong and corresponding right to be right to politicians,but the separation and balance of powers does not evaluate whether presidents,states,mayors,et al.,have exercised the power to be wrong reasonably,so that they could even abuse it in the COVID-19 governance,and did great harm to people’s human rights without any accountability or impeachment.Democratic governor’power to be wrong authorized by election was deprived by President Trump through issuing false information in the COVID-19 governance and encouraging people to protest against the anti-pandemic laws,which made liberal democracy in the United States threatened and COVID-19 out of control.展开更多
The failure of COVID-19 governance in the United States of America is closely related to its economic inequality.According to the theory of error-tolerant democracy,after reflecting on the American financial crisis of...The failure of COVID-19 governance in the United States of America is closely related to its economic inequality.According to the theory of error-tolerant democracy,after reflecting on the American financial crisis of 2008,liberty should be redefined from mutual empowerment under the background of regulation,which means that rights to liberty of entrepreneurs and financial capitalists in the public economy are empowered by the people,so they should empower and benefit the people,corresponding to regulation and redistribution respectively.During the COVID-19 pandemic,empowering and benefiting the people regarded as economic democracy has not been realized for neoliberal policies,leading to insufficient public funds to help citizens badly hurt by the disease.To restore the U.S.as the beacon of democracy,it should undertake the historical mission:expansion of liberal democracy from politics to economy so as to reduce unreasonable economic inequality and protect rights to life of more infected Americans.展开更多
One of the pressing problems with contemporary peacebuilding research is that much of the analysis focuses on thepractical and technical challenges while paying little attention to the philosophical assumptions of tho...One of the pressing problems with contemporary peacebuilding research is that much of the analysis focuses on thepractical and technical challenges while paying little attention to the philosophical assumptions of those operations.Any understanding of peacebuilding is underpinned by philosophical frameworks as they shape and orient ustowards particular strategies for peacebuilding. This paper makes a philosophical critique of liberal peacebuilding（the mainstream peacebuilding） and explores a postmodern post-liberal hybrid peacebuilding. The analysis claimsneither the categorical rejection of liberal peacebuilding nor the exclusive reliance on locally-orientedpeacebuilding. Rather, the upshot is the need for deconstructing dualistic view of either liberal peacebuilding orlocally-oriented peacebuilding so that both external liberal actors and local actors engage in jointly learning andmutually transformative process wherein both liberal international actors and local actors look beyond peaceconstructed around their narrow and restricted conception and framework to create the meanings of peace that caninterconnect the global and the local.展开更多
Taking the four approaches to internationalization of education as the departure point,the paper analyzes internationalization of higher education in OECD countries.
With the development and application of artificial intelligence(AI)technology,it has promoted the upgrading and development of the industry.However,AI also brings intangible impact to the actual survival of human bein...With the development and application of artificial intelligence(AI)technology,it has promoted the upgrading and development of the industry.However,AI also brings intangible impact to the actual survival of human beings.Stephen·Hawking,the renowned physicist,has repeatedly warned,making it all the more urgent to reflect on the negative effects of artificial intelligence.Therefore,the review of AI should consider from the perspective of historical development,scientifically explain its changes in the way of human labor and social life,as well as the great significance of such changes to the liberation of human labor.展开更多
As early as the 18th century,Confucian liberalism of considering others in one s own place was integrated into the provisions of freedom of the Declaration of the Rights of Man and of the Citizen.In 1948,the Confucian...As early as the 18th century,Confucian liberalism of considering others in one s own place was integrated into the provisions of freedom of the Declaration of the Rights of Man and of the Citizen.In 1948,the Confucian idea of benevolence and other liberalism had an important influence on the drafting and content of the Universal Declaration of Human Rights.The fulcrum of Confucian liberalism is self-discipline based on benevolence.The code of conduct created by Confucianism of"What you do not want done to yourself,do not do to others"has the social effect of safeguarding people’s negative freedom;the code of conduct of"while establishing himself and pursuing success,also works to establish others and enable them to succeed as well"has the social effect of safeguarding people s positive freedom.Confucian liberalism is social-oriented,which adheres to the unity of everyone’s freedom with the freedom of others,and the idea that individual freedom lies in the overall freedom of the social community.It is based on the conscience(benevolence)of the way of considering others in one’s own place and the practical path from the obligation to rights and freedoms are prominent features of traditional Chinese culture.It is consistent with the Universal Declaration of Human Rights’provision that everyone has duties to the community,and is similar to Marx’s philosophy that"the free development of every human being is the condition of the free development of all human beings",and is a unique system of liberal discourse that is different from Western liberalism.展开更多
The associated minerals make coal middlings possess a relatively high ash content.Subsequent liberation through size reduction can cause recovery increase.However,effect of comminution facilities on mineral liberation...The associated minerals make coal middlings possess a relatively high ash content.Subsequent liberation through size reduction can cause recovery increase.However,effect of comminution facilities on mineral liberation of middlings was ignored.This paper studied the liberation characteristics of middlings crushed with different kinds of fragmentation forces.Middlings of 3 mm+0.5 mm sampled from a dense medium cyclone were comminuted by a jaw crusher and a ball mill to 0.5 mm with similar size distribution respectively.The generating mechanism of fnes was also analyzed.Full densimetric analyses indicate that mineral liberation of the product crushed by the jaw crusher is better than that by the ball mill at each fraction.For sizes of 0.125 mm+0.074 mm and 0.074 mm,yields of the product with ash content 11%comminuted by jaw crusher are nearly 20%higher than that by the ball mill.Sectional micrographs observed by the scanning electron microscopy(SEM)also show the same law for these two fractions and some intergrowth particles still exist in the fraction of 0.5 mm+0.25 mm.展开更多
As ore grades constantly decline,more copper tailings,which still contain a considerable amount of unrecovered copper,are expected to be produced as a byproduct of froth flotation.This research reveals the occurrence ...As ore grades constantly decline,more copper tailings,which still contain a considerable amount of unrecovered copper,are expected to be produced as a byproduct of froth flotation.This research reveals the occurrence mechanism of copper minerals in typical copper sulfide tailings using quantitative mineral liberation analysis(MLA)integrated with scanning electron microscopy–energy dispersive spectroscopy(SEM–EDS).A comprehensive mineralogical characterization was carried out,and the results showed that almost all copper minerals were highly disseminated within coarse gangue particles,except for 9.2wt%chalcopyrite that occurred in the 160–180μm size fraction.The predominant copper-bearing mineral was chalcopyrite,which was closely intergrown with orthoclase and muscovite rather than quartz.The flotation tailings sample still contained 3.28wt%liberated chalcopyrite and 3.13wt%liberated bornite because of their extremely fine granularity.The SEM–EDS analysis further demonstrated that copper minerals mainly occurred as fine dispersed and fully enclosed structures in gangue minerals.The information obtained from this research could offer useful references for recovering residual copper from flotation tailings.展开更多
This study involved the investigation of the effects of the continuous cooling process conditions on the crystallization and liberation characteristics of anosovite in Ti-bearing titanomagnetite smelting slag. The sam...This study involved the investigation of the effects of the continuous cooling process conditions on the crystallization and liberation characteristics of anosovite in Ti-bearing titanomagnetite smelting slag. The samples were heated until melting and then the temperature was held at 1650℃ for nearly 0.5 h;subsequently, the samples were cooled at different cooling rates to different temperatures and water-quenched after being held for different times at these temperatures. Last, the obtained crystallized samples were used to analyze the crystallization and liberation characteristics. It was found that, during the continuous cooling process, anosovite particles were found to initially precipitate in the slag at a relatively high crystallization temperature, showing the characteristics of euhedral crystal. The precipitation and growth of anosovite grain is strong and the morphology of anosovite was basically not affected by the continuous cooling conditions. From the morphology perspective, the formed anosovite is an excellent Ti-rich phase to be selective separated. The formation of spinel and diopside is negative for the liberation and selective separation of the anosovite phase. The crystallization diagrams of TiO2-MgO-CaO-SiO2-Al2O3-FeO slag undergoing different continuous cooling processes were constructed to help to determine the optimal continuous cooling–quenching condition for selective separation of anosovite. Moreover, the addition of B2O3 can enlarge the range of the optimal continuous cooling–quenching conditions for selective separation of anosovite.展开更多
The removal of iron from an Indian diaspore sample was studied using magnetic separation and leaching techniques aided by an in-depth mineralogical characterization study involving quantitative mineralogical evaluatio...The removal of iron from an Indian diaspore sample was studied using magnetic separation and leaching techniques aided by an in-depth mineralogical characterization study involving quantitative mineralogical evaluation by scanning electron microscope（QEMSCAN）, electron probe micro-analyzer（EPMA） and X-ray diffraction（XRD）. The characterization studies indicate that extremely fine-sized hematite grains are associated with several other mineral phases in a complex manner with around 60% of the hematite not liberated even below the size of 38 μm limiting the scope of physical separation processes to remove the iron. Wet high intensity magnetic separation（WHIMS） studies reveal that only 49% of iron can be removed. Further, leaching studies using oxalic acid suggest that around 76% of the iron can be removed under conditions such as a solid to liquid ratio of 0.05：1, a temperature of 90 ℃ a time period of 120 min and an acid concentration of 1 mol/L. The dissolution of iron in oxalic acid is found to be controlled by chemical reaction and the activation energy is calculated as 35.15 k J/mol.展开更多
文摘The rise of Al is reigniting debate over whether liberal arts education still matters,and why it might matter more In her sophomore year in 2023,Mu Ting,an English major with a passion for literature,enrolled in her first programming course.
基金Education Teaching Reform Research and Practice Project of Tangshan Normal University“Research on the Construction and Practical Pathways of‘Foreign Languages+Majors’Interdisciplinary Model under the Background of New Liberal Arts”(2025JGZD114)。
文摘The construction of new liberal arts emphasizes interdisciplinary integration and the cultivation of compound talents,providing new opportunities for the collaborative development of foreign language majors and tourism majors in universities.The“foreign language+tourism”teaching model,by integrating the instrumental nature of language and the applied nature of tourism,aims to cultivate compound talents with both cross-cultural communication skills and practical capabilities in the tourism industry.Based on the background of new liberal arts,this paper analyzes the current status and challenges of“foreign language+tourism”teaching in universities,and proposes specific teaching paths from the dimensions of curriculum system reconstruction,teaching model innovation,faculty team optimization,and evaluation mechanism improvement,aiming to provide a theoretical reference for cultivating high-quality talents adapted to the high-quality development needs of the cultural and tourism industry.
基金Guangzhou Huashang College 2024 Demonstration Major Program(Project No.:HS2024SFZY09)。
文摘As China’s higher education transitions from extensive expansion to intensive development,the‘New Liberal Arts’concept has emerged as a pivotal strategic direction for transforming humanities disciplines.This approach emphasizes interdisciplinary integration,parallel development of theory and practice,and optimizing talent cultivation models guided by societal demands.The diversified economic structure and high-quality development trajectory of the Guangdong-Hong Kong-Macao Greater Bay Area present new demands for talent cultivation,curriculum design,and pedagogical reform within university Human Resource Management(HRM)programs.Taking Guangzhou Huashang College as the research subject,this paper analyses the core competencies required for HRM programs under the New Liberal Arts framework through policy document analysis,literature review,and field research.It identifies shortcomings in the current curriculum system regarding knowledge structure,practical pathways,and cross-disciplinary integration.Guided by Outcome-Based Education(OBE)and Competency-Based Education(CBE)frameworks,a new curriculum architecture was designed comprising four pillars:general education and humanities literacy,professional core competencies,cross-disciplinary integration,and practical innovation.Practical explorations were undertaken in areas such as university-enterprise collaboration and industry-education integration.Preliminary outcomes demonstrate that the new scheme comprehensively enhances students’data comprehension,strategic awareness,and humanistic sensitivity,providing a reference paradigm for the high-quality development of HRM programs within the new liberal arts context.
基金Supported by Educational Science Research Project of Beijing Union University“A Study on the Cultivation Path of Core Competencies of English Talents in Universities Under the Background of New Liberal Arts”(JK202209).
文摘This paper elaborates on the approaches to cultivating core competencies for college English talents under the background of New Liberal Arts,focusing on four key aspects:transmitting of Chinese culture in English to cultivate students’cultural confidence in the context of globalization,fostering their interdisciplinary competencies through the crossover of different disciplines and knowledge fusion,utilizing big data and emerging technologies to develop students’language proficiency and autonomous learning abilities,and aligning education with societal needs by integrating theoretical learning with practical teaching,thereby enhancing students’social engagement and problem-solving skills.The study aims to advance the reform of foreign language education in the new era,enhance the competitiveness of future professionals,and guide students toward a sound personal and professional development.
基金Supported by Yangtze University School-level Teaching Research Project(JY2021038,JY2022009,JY2024059)。
文摘Against the dual background of deepening the construction of new liberal arts and implementing the"Double Ten Thousand Plan"for first-class undergraduate courses,local universities urgently need to explore distinctive curriculum construction paths.Based on the requirements of the new liberal arts connotation,this paper constructs a three-dimensional integrated framework of"value guidance,ability driven,and knowledge foundation",and takes the construction of the"Finance"course at Yangtze University as a typical case for research.When systematically analyzing the"Finance"course in the school,a three-dimensional integrated curriculum reform practice is implemented by reshaping the three-level curriculum objectives of"state-society-individual",developing teaching content that integrates"modularization-localization-cutting-edge",using the"O-PRAISE"situational teaching method,and constructing a diversified collaborative evaluation system.A first-class curriculum construction model for local universities has been summarized,which involves five collaborative approaches:"localization"of target positioning,"integration"of content construction,"contextualization"of method implementation,"value-added"evaluation orientation,and"synergy"of resource guarantee.The aim is to provide theoretical paradigms and practical solutions for similar universities to learn from,effectively solving practical difficulties such as the disconnect between value shaping and knowledge transmission,and the mismatch between talent cultivation and local needs in curriculum construction.
基金a phased achievement of the youth project of National Social Science Fund of China“A Study of General Secretary Xi Jinping’s Thought on‘Mind Study’of Communists”(18CKS034)。
文摘Marx’s"Jewish Issue"is an issue of relationship between political liberation and human liberation.Marx believed that rather than presupposing the abolition of religion and universal human liberation,political liberation is only a historical stage of human liberation,,even though with important historical progressive value. Around this theme,Marx went beyond the perspective of religious criticism and gave priority to the analysis of the modern political state in the field of civil society,lightening the limits of political liberation and the path of human liberation.
文摘Liberal democracy cannot help America govern COVID-19 effectively for liberalism’s misunderstanding of the concept of liberty.Error-tolerantism divides liberty into the right to liberty in innovative fields,the right to be wrong as an original right,and the right to be right in non-innovative ones as sub-rights;rights come from mutual empowerment among people.The major defects of liberal democracy from the perspective of error-tolerant democracy constructed on error-tolerantism are as follows:The essence of election is to transfer people’s right to be wrong and corresponding right to be right to politicians,but the separation and balance of powers does not evaluate whether presidents,states,mayors,et al.,have exercised the power to be wrong reasonably,so that they could even abuse it in the COVID-19 governance,and did great harm to people’s human rights without any accountability or impeachment.Democratic governor’power to be wrong authorized by election was deprived by President Trump through issuing false information in the COVID-19 governance and encouraging people to protest against the anti-pandemic laws,which made liberal democracy in the United States threatened and COVID-19 out of control.
文摘The failure of COVID-19 governance in the United States of America is closely related to its economic inequality.According to the theory of error-tolerant democracy,after reflecting on the American financial crisis of 2008,liberty should be redefined from mutual empowerment under the background of regulation,which means that rights to liberty of entrepreneurs and financial capitalists in the public economy are empowered by the people,so they should empower and benefit the people,corresponding to regulation and redistribution respectively.During the COVID-19 pandemic,empowering and benefiting the people regarded as economic democracy has not been realized for neoliberal policies,leading to insufficient public funds to help citizens badly hurt by the disease.To restore the U.S.as the beacon of democracy,it should undertake the historical mission:expansion of liberal democracy from politics to economy so as to reduce unreasonable economic inequality and protect rights to life of more infected Americans.
文摘One of the pressing problems with contemporary peacebuilding research is that much of the analysis focuses on thepractical and technical challenges while paying little attention to the philosophical assumptions of those operations.Any understanding of peacebuilding is underpinned by philosophical frameworks as they shape and orient ustowards particular strategies for peacebuilding. This paper makes a philosophical critique of liberal peacebuilding（the mainstream peacebuilding） and explores a postmodern post-liberal hybrid peacebuilding. The analysis claimsneither the categorical rejection of liberal peacebuilding nor the exclusive reliance on locally-orientedpeacebuilding. Rather, the upshot is the need for deconstructing dualistic view of either liberal peacebuilding orlocally-oriented peacebuilding so that both external liberal actors and local actors engage in jointly learning andmutually transformative process wherein both liberal international actors and local actors look beyond peaceconstructed around their narrow and restricted conception and framework to create the meanings of peace that caninterconnect the global and the local.
文摘Taking the four approaches to internationalization of education as the departure point,the paper analyzes internationalization of higher education in OECD countries.
文摘With the development and application of artificial intelligence(AI)technology,it has promoted the upgrading and development of the industry.However,AI also brings intangible impact to the actual survival of human beings.Stephen·Hawking,the renowned physicist,has repeatedly warned,making it all the more urgent to reflect on the negative effects of artificial intelligence.Therefore,the review of AI should consider from the perspective of historical development,scientifically explain its changes in the way of human labor and social life,as well as the great significance of such changes to the liberation of human labor.
文摘As early as the 18th century,Confucian liberalism of considering others in one s own place was integrated into the provisions of freedom of the Declaration of the Rights of Man and of the Citizen.In 1948,the Confucian idea of benevolence and other liberalism had an important influence on the drafting and content of the Universal Declaration of Human Rights.The fulcrum of Confucian liberalism is self-discipline based on benevolence.The code of conduct created by Confucianism of"What you do not want done to yourself,do not do to others"has the social effect of safeguarding people’s negative freedom;the code of conduct of"while establishing himself and pursuing success,also works to establish others and enable them to succeed as well"has the social effect of safeguarding people s positive freedom.Confucian liberalism is social-oriented,which adheres to the unity of everyone’s freedom with the freedom of others,and the idea that individual freedom lies in the overall freedom of the social community.It is based on the conscience(benevolence)of the way of considering others in one’s own place and the practical path from the obligation to rights and freedoms are prominent features of traditional Chinese culture.It is consistent with the Universal Declaration of Human Rights’provision that everyone has duties to the community,and is similar to Marx’s philosophy that"the free development of every human being is the condition of the free development of all human beings",and is a unique system of liberal discourse that is different from Western liberalism.
基金supported financially by the National Natural Science Foundation of China(No.5107415651274196 and51221462)the Natural Youth Science Foundation of China(No.51104160)
文摘The associated minerals make coal middlings possess a relatively high ash content.Subsequent liberation through size reduction can cause recovery increase.However,effect of comminution facilities on mineral liberation of middlings was ignored.This paper studied the liberation characteristics of middlings crushed with different kinds of fragmentation forces.Middlings of 3 mm+0.5 mm sampled from a dense medium cyclone were comminuted by a jaw crusher and a ball mill to 0.5 mm with similar size distribution respectively.The generating mechanism of fnes was also analyzed.Full densimetric analyses indicate that mineral liberation of the product crushed by the jaw crusher is better than that by the ball mill at each fraction.For sizes of 0.125 mm+0.074 mm and 0.074 mm,yields of the product with ash content 11%comminuted by jaw crusher are nearly 20%higher than that by the ball mill.Sectional micrographs observed by the scanning electron microscopy(SEM)also show the same law for these two fractions and some intergrowth particles still exist in the fraction of 0.5 mm+0.25 mm.
基金This work was financially supported by a grant from Nonferrous Corporation Africa Mining Public Limited Company and National Natural Science Foundation of China(No.51804020).
文摘As ore grades constantly decline,more copper tailings,which still contain a considerable amount of unrecovered copper,are expected to be produced as a byproduct of froth flotation.This research reveals the occurrence mechanism of copper minerals in typical copper sulfide tailings using quantitative mineral liberation analysis(MLA)integrated with scanning electron microscopy–energy dispersive spectroscopy(SEM–EDS).A comprehensive mineralogical characterization was carried out,and the results showed that almost all copper minerals were highly disseminated within coarse gangue particles,except for 9.2wt%chalcopyrite that occurred in the 160–180μm size fraction.The predominant copper-bearing mineral was chalcopyrite,which was closely intergrown with orthoclase and muscovite rather than quartz.The flotation tailings sample still contained 3.28wt%liberated chalcopyrite and 3.13wt%liberated bornite because of their extremely fine granularity.The SEM–EDS analysis further demonstrated that copper minerals mainly occurred as fine dispersed and fully enclosed structures in gangue minerals.The information obtained from this research could offer useful references for recovering residual copper from flotation tailings.
基金financially supported by the National Natural Science Foundation of China (Nos. 51404226 and 21736010)
文摘This study involved the investigation of the effects of the continuous cooling process conditions on the crystallization and liberation characteristics of anosovite in Ti-bearing titanomagnetite smelting slag. The samples were heated until melting and then the temperature was held at 1650℃ for nearly 0.5 h;subsequently, the samples were cooled at different cooling rates to different temperatures and water-quenched after being held for different times at these temperatures. Last, the obtained crystallized samples were used to analyze the crystallization and liberation characteristics. It was found that, during the continuous cooling process, anosovite particles were found to initially precipitate in the slag at a relatively high crystallization temperature, showing the characteristics of euhedral crystal. The precipitation and growth of anosovite grain is strong and the morphology of anosovite was basically not affected by the continuous cooling conditions. From the morphology perspective, the formed anosovite is an excellent Ti-rich phase to be selective separated. The formation of spinel and diopside is negative for the liberation and selective separation of the anosovite phase. The crystallization diagrams of TiO2-MgO-CaO-SiO2-Al2O3-FeO slag undergoing different continuous cooling processes were constructed to help to determine the optimal continuous cooling–quenching condition for selective separation of anosovite. Moreover, the addition of B2O3 can enlarge the range of the optimal continuous cooling–quenching conditions for selective separation of anosovite.
文摘The removal of iron from an Indian diaspore sample was studied using magnetic separation and leaching techniques aided by an in-depth mineralogical characterization study involving quantitative mineralogical evaluation by scanning electron microscope（QEMSCAN）, electron probe micro-analyzer（EPMA） and X-ray diffraction（XRD）. The characterization studies indicate that extremely fine-sized hematite grains are associated with several other mineral phases in a complex manner with around 60% of the hematite not liberated even below the size of 38 μm limiting the scope of physical separation processes to remove the iron. Wet high intensity magnetic separation（WHIMS） studies reveal that only 49% of iron can be removed. Further, leaching studies using oxalic acid suggest that around 76% of the iron can be removed under conditions such as a solid to liquid ratio of 0.05：1, a temperature of 90 ℃ a time period of 120 min and an acid concentration of 1 mol/L. The dissolution of iron in oxalic acid is found to be controlled by chemical reaction and the activation energy is calculated as 35.15 k J/mol.
