微细粒硅钙质磷矿双反浮选试验  

Double reverse flotation of siliceous-calcareous phosphate rock with very fine particle size

作　　者：阮耀阳[1] 罗惠华[1] 徐伟 陈慧 王旭东 池汝安[1] 邓博纳 Ruan Yaoyang;Luo Huihua;Xu Wei;Chen Hui;Wang Xudong;Chi Ru'an;Deng Bona(School of Resources and Safety Engineering,Wuhan University of Technology,Wuhan Hubei 430073,China;State Key Laboratory for Efficient Utilization of Low Grade Phosphate Rock,Associated Resources,Guiyang Guizhou 550002,China;Hubei Xingfa Chemicals Group Co.,Ltd.,Yichang Hubei 443000,China)

机构地区：[1]武汉工程大学资源与安全工程学院,湖北武汉430073 [2]中低品位磷矿及其共伴生资源高效利用国家重点实验室,贵州贵阳550002 [3]湖北兴发化工集团股份有限公司,湖北宜昌443000

出　　处：《化工矿物与加工》2022年第7期13-17,共5页Industrial Minerals & Processing

基　　金：国家自然科学基金青年项目(52004185);中低品位磷矿及其共伴生资源高效利用国家重点实验室开放课题(WFKF2020-02);武汉工程大学校内科学研究基金(K201933)。

摘　　要：针对中低品位胶磷矿嵌布粒度细、分选难度大、利用率低的资源现状,对粒级为-500目质量分数占92.7%的硅钙质磷矿进行了双反浮选试验研究,结果表明,适量的苛化淀粉或聚丙烯酰胺均对阳离子捕收剂反浮选脱硅具有良好的促进作用,且苛化淀粉效果更佳。试验确定的脱硅粗选条件为:矿浆pH约为6.0,苛化淀粉用量800 g/t,阳离子捕收剂采用分段加药方式,用量为140 g/t。当给矿P_(2)O_(5)品位为24.68%时,闭路试验获得了P_(2)O_(5)品位为29.39%、P_(2)O_(5)回收率为89.20%的较好精矿指标。研究成果对微细粒磷矿的开发利用具有一定的指导意义。The mid-low grade phosphate rock is difficult to be upgraded and utilized as a resource because the valu-able minerals are very finely disseminated in the ore.A double reverse flotation experiment was carried out on a siliceous-calcareous phosphate rock with the grinding fineness of 92.7%-500 mesh.The results show that addition of an appropriate amount of either caustic starch or polyacrylamide to the pulp was favorable to removal of silicates by reverse flotation,but starch exhibited better performance than polyacrylamide.The optimum conditions for removal of silicates in roughing flotation were determined as follows:the pulp was set about pH 6.0,the dosage of caustic starch was 800 g/t,and the addition of cationic collector was performed in stages with total dosage of 170 g/t.The phosphate concentrate with P_(2)O_(5) grade of 29.39%and P_(2)O_(5)recovery of 89.20%was obtained from the flotation feed containing 24.68%P_(2)O_(5) upon completion of a closed circuit test.The results of the study were of great significance to the deve-lopment and utilization of similar phosphate ore with fine particle size.

关 键 词：中低品位胶磷矿 硅钙质磷矿 微细粒 双反浮选 苛化淀粉 

分 类 号：TD971[矿业工程—选矿]