金宝山铂族矿物氧压浸出-浮选联合工艺（英文）

Oxygen pressure leaching-flotation joint process for Jinbaoshan platinum group minerals

为了生产适合冶炼的铂族精矿,提出一种氧压浸出-浮选联合工艺处理金宝山铂族矿物。结果表明:氧压浸出条件(矿物粒度、搅拌速度、液固比以及木质素磺酸钙用量)对浸出过程中贱金属(铜、铁和镍)浸出率以及浮选工艺中铂族金属(铂和钯)的回收率产生明显影响。浸出过程中贱金属硫化矿物的完全溶解导致铂族金属浮选降低了浮选载体的数量,降低浮选过程中铂族金属回收率。综合考虑贱金属浸出率和铂族金属回收率,确立如下最佳工艺条件:精矿粒度-0.043 mm占有率为73%,搅拌速度为400 r/min,液固比为10 mL/g,木质磺酸钙用量为0.6 g。最佳工艺条件下,铜、镍和铁的浸出率分别为87.6%、87.6%和90.3%。采用浮选工艺处理浸出渣获得浮选精矿铂族金属品位为420 g/t。

An oxygen pressure leaching-flotation joint process was proposed to treat Jinbaoshan platinum group minerals to produce a desired concentrate. The result demonstrates that leaching parameters which include particle size, stirring speed, liquid-solid ratio, and the dosage of calcium lignosulfonate, simultaneously affect the leaching rates of base metals and the recovery of platinum group metals (PGMs). The complete dissolution of base metals sulfides leads to a reduction in the amount of flotation carrier for enriching PGMs, decreasing the recovery of PGMs. The optimum leaching conditions are determined as follows: liquid-solid ratio of 10 mL/g, 73% occupancy of ore particle size below 0.043 mm, stirring speed of 400 r/min, and 0.6 g dosage of calcium lignosulfonate. Under optimal conditions, the leaching rates of Cu, Ni and Fe are 87.6%, 87.6% and 90.3%, respectively. The grade of PGMs enriched in the flotation concentrate is 420 g/t through the flotation technology.