Pilbara blending iron ore powder （PB powder） is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components we...Pilbara blending iron ore powder （PB powder） is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components were studied respectively such as the macroscopic properties, microscopic properties, and high-temperature properties the behavior and effect in the sintering were mastered. Then based on the new ore-proportioning idea of iron ores sintering characteristics complementary, the principles on the effective use of PB powder were discussed, and was fur ther validated through the sintering pot test and industrial production. The results show that PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. With the ore-proportioning optimization based on the iron ores sintering characteristics complementary, the proportion of PB iron ore powder can be increased to more than 45 %.展开更多
The Pilbara region of Western Australia is one of only two areas on Earth–the other being the Kaapvaal Craton of southern Africa–that contain well preserved,nearcontinuous geological records of crustal evolution fro...The Pilbara region of Western Australia is one of only two areas on Earth–the other being the Kaapvaal Craton of southern Africa–that contain well preserved,nearcontinuous geological records of crustal evolution from the Paleoarchean into the late Paleoproterozoic.The Pilbara is famous for hosting fossil evidence of early life(stromatolites and microfossils),and for containing a record of the early Archean atmosphere.The geological record extends from granite–greenstone terranes and overlying clastic basins of the 3.53–2.83 Ga Pilbara Craton,across a major unconformity,to a series of 2.78–1.79 Ga volcanic and sedimentary successions.Between 3.53–3.23 Ga,a succession of mantle plume events formed a thick volcanic plateau on older continental crust,remnants of which include enclaves of c.3.6 Ga granitic gneiss and abundant 3.8–3.6 Ga inherited and detrital zircons.During each of the plume events,the volcanic plateau was intruded by crustally-derived granitic rocks,leading to vertical deformation by partial convective overturn.By 3.23 Ga,these processes had established thick continental crust that was then rifted into three microplates separated by c.3.2 Ga basins of oceanic crust.Subsequent plate tectonic processes to 2.90 Ga included subduction,terrane accretion,and orogeny.From 2.78–2.63 Ga the northern Pilbara Craton was affected by minor rifting,followed by deposition of thick basaltic formations separated by felsic volcanic and sedimentary rocks(Fortescue Basin).Rifting in the southern Pilbara resulted in progressively deepening marginal basin sedimentation,including thick units of banded iron formation(Hamersley Basin:2.63–2.45 Ga).展开更多
为了从遥感角度对西澳大利亚哈默斯利盆地的沉积变质条带状含铁建造(banded iron formation,BIF)型铁矿进行深入研究,利用ETM图像对皮尔巴拉地块进行地质矿产解译,采用ASTER图像对目标区域进行矿化蚀变信息提取;结合传统地质矿产理论及...为了从遥感角度对西澳大利亚哈默斯利盆地的沉积变质条带状含铁建造(banded iron formation,BIF)型铁矿进行深入研究,利用ETM图像对皮尔巴拉地块进行地质矿产解译,采用ASTER图像对目标区域进行矿化蚀变信息提取;结合传统地质矿产理论及相关文献,对区内BIF型铁矿的遥感地质特征及其成矿机理进行深入解剖、对比和研究,在此基础上建立了BIF型铁矿的遥感地质找矿模型;并圈定了找矿远景区,以期能在BIF型铁矿找矿(前期)技术方面取得突破,为寻找BIF型铁矿提供技术支持与帮助。具有现实验证意义的是,在所圈定的找矿远景区进行野外调查时发现,澳大利亚力拓集团已经在纽曼—必和必拓C区远景区内筹建一处大型铁矿,前期平地工作已基本完成。展开更多
文摘Pilbara blending iron ore powder （PB powder） is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components were studied respectively such as the macroscopic properties, microscopic properties, and high-temperature properties the behavior and effect in the sintering were mastered. Then based on the new ore-proportioning idea of iron ores sintering characteristics complementary, the principles on the effective use of PB powder were discussed, and was fur ther validated through the sintering pot test and industrial production. The results show that PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. With the ore-proportioning optimization based on the iron ores sintering characteristics complementary, the proportion of PB iron ore powder can be increased to more than 45 %.
文摘The Pilbara region of Western Australia is one of only two areas on Earth–the other being the Kaapvaal Craton of southern Africa–that contain well preserved,nearcontinuous geological records of crustal evolution from the Paleoarchean into the late Paleoproterozoic.The Pilbara is famous for hosting fossil evidence of early life(stromatolites and microfossils),and for containing a record of the early Archean atmosphere.The geological record extends from granite–greenstone terranes and overlying clastic basins of the 3.53–2.83 Ga Pilbara Craton,across a major unconformity,to a series of 2.78–1.79 Ga volcanic and sedimentary successions.Between 3.53–3.23 Ga,a succession of mantle plume events formed a thick volcanic plateau on older continental crust,remnants of which include enclaves of c.3.6 Ga granitic gneiss and abundant 3.8–3.6 Ga inherited and detrital zircons.During each of the plume events,the volcanic plateau was intruded by crustally-derived granitic rocks,leading to vertical deformation by partial convective overturn.By 3.23 Ga,these processes had established thick continental crust that was then rifted into three microplates separated by c.3.2 Ga basins of oceanic crust.Subsequent plate tectonic processes to 2.90 Ga included subduction,terrane accretion,and orogeny.From 2.78–2.63 Ga the northern Pilbara Craton was affected by minor rifting,followed by deposition of thick basaltic formations separated by felsic volcanic and sedimentary rocks(Fortescue Basin).Rifting in the southern Pilbara resulted in progressively deepening marginal basin sedimentation,including thick units of banded iron formation(Hamersley Basin:2.63–2.45 Ga).
文摘为了从遥感角度对西澳大利亚哈默斯利盆地的沉积变质条带状含铁建造(banded iron formation,BIF)型铁矿进行深入研究,利用ETM图像对皮尔巴拉地块进行地质矿产解译,采用ASTER图像对目标区域进行矿化蚀变信息提取;结合传统地质矿产理论及相关文献,对区内BIF型铁矿的遥感地质特征及其成矿机理进行深入解剖、对比和研究,在此基础上建立了BIF型铁矿的遥感地质找矿模型;并圈定了找矿远景区,以期能在BIF型铁矿找矿(前期)技术方面取得突破,为寻找BIF型铁矿提供技术支持与帮助。具有现实验证意义的是,在所圈定的找矿远景区进行野外调查时发现,澳大利亚力拓集团已经在纽曼—必和必拓C区远景区内筹建一处大型铁矿,前期平地工作已基本完成。
