摘要
宜昌中磷层磷矿平均P2O5品位仅为22%左右,难以直接工业利用。中磷层磷矿有价磷矿物为磷灰石和胶磷矿,其嵌布粒度较细、在0.03~0.5 mm之间,磷灰石和胶磷矿多呈富磷矿物集合体形式存在,富磷矿物集合体嵌布粒度较粗,能够作为选别对象。中磷层磷矿经过筛分处理,-10 mm粒级磷精矿P2O5品位约为26%,可直接给入浮选作业处理。而-30+10 mm粒级产品采用X射线拣选技术,可获得P2O5品位26%以上、作业回收率80%~86%的磷精矿。筛分作业-10 mm粒级磷精矿与X射线拣选得到的磷精矿合并送往反浮选作业,最终可获得P2O5品位32%以上的优质磷精矿。试验结果表明,X射线拣选—浮选联合工艺表现出优良的分选效果,在处理其它类似低品位、嵌布粒度细的磷矿资源时,该联合工艺有巨大的推广潜力。
The P2O5 grade of Yichang middle phosphate rock is only about 22%on average,it is difficult to direct industrial use.Apatite and collophane are the main valuable P-containing minerals in Yichang ore.They have fine dissemination size of 0.03-0.5 mm.But they exists in the form of coarse-grained aggregate of P-containing minerals which can be used as separation objects.After ore of Yichang middle phosphate rock layer was screen,P2O5 grade in-10 mm class is about 26%which can be directly as feed of flotation.While the-30+10 mm class was treated using X-ray sorting technology,after that,phosphorus concentrate was obtained with P2O5 grade of more than 26%and recovery of 80%-86%.The-10 mm class products and X-ray sorting concentrate together feed into reverse flotation.Flotation concentrate with P2O5 grade of more than 32%was obtained eventually.The test results show that the X-ray sorting-reverse flotation process will show a good separation effect,in dealing with other similar low grade phosphate rock1 resources,and the combined process has great potential of popularization.
作者
李宇新
田孟杰
瞿定军
胡学超
孙伟
高志勇
LI Yuxin;TIAN Mengjie;QU Dingjun;HU Xuechao;SUN Wei;GAO Zhiyong(YiHua Mining Limited Compony of Hubei, Yichang 443100, Hubei, China;School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China;Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China)
出处
《矿产保护与利用》
2020年第6期52-57,共6页
Conservation and Utilization of Mineral Resources
基金
武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室开放课题基金资助项目
湖北宜化矿业有限责任公司与中南大学校企合作项目。
关键词
宜昌中磷层磷矿
筛分
粗粒X射线拣选
预选
反浮选
Yichang middle phosphate layer
screening
X-ray sorting
preconcentration
reverse flotation
