某铜锡多金属矿尾矿工艺矿物学研究

针对某铜锡多金属矿尾矿进行工艺矿物学研究,发现该尾矿含有钨、锡、铋等有价金属,含量分别为0.088%、0.082%和0.054%。研究结果表明虽然有价元素含量低,但均以矿物形式存在且粒度较粗,有价矿物集合体解离情况好,且与脉石矿物之间存在较大的相对密度差异。富集试验表明硫化物矿物通过淘洗可得到有效富集,因此选矿试验可利用矿物之间的密度差。通过重选实现有价矿物的预富集;针对淘洗富集产品的工艺矿物学研究结果表明:有价矿物磁黄铁矿、白钨矿、锡石、黑钨矿和自然铋的粒度相对较粗,一般为0.02~0.104mm,而且单体解离度都在80%以上,解离比较充分,有利于后续彼此之间的分离。根据尾矿中有用矿物嵌布关系、粒度分布和解离度等工艺矿物学结论,选厂采用"重选预富集-铋硫混浮-铋硫分离-钨锡重选富集-浮选分离"工艺,获得了铋精矿、钨精矿和锡精矿,提高了企业的经济效益。

Process mineralogy study of tail from a Cu-Sn polymetallic ore deposit

The grade of WO3, Sn and Bi in the tail from a Cu-Sn polymetallic is 0.088%, 0.082 and 0.54% respectively. Process mineralogy study point out that even though grade of value elements are low, the grain size of target minerals are coarse and degree of liberation of them are also every high. The densities of target minerals are also much different from gangue minerals. In this situation, it is possible to concentrate target minerals firstly, then to think about separation to achieve value products. Process mineralogy study focusing on concentrate product shows that: size of grains for target minerals is coarse, most of which is between 0.02mm-0.104mm. And also, liberation degree of all target minerals is more than 80%. In this situation, it should be easy for separation process. At last, a process that include gravity pre-concentration, Bi-S bulk flotation, Bi-S separation, WO3-Sn gravity concentration and flotation separation has been used, achieving Bi-concentration, WO3-concentratiion and Sn- Concentration.