某复合型铜钴矿合理选矿工艺及硫化作用机理研究

以NaHS作硫化剂、水玻璃和CMC作组合抑制剂、Y-89作捕收剂、MIBC作起泡剂, 采用预先浮选脱泥、NaHS诱导同步浮选的选别工艺流程对某复合型铜钴矿进行了选矿工艺研究。原矿中铜、钴品位分别为1.14%、0.18%时, 闭路精矿产品中, 铜的品位达到24.78%, 回收率为72.66%; 钴的品位为2.75%, 回收率达到51.10%。硫化剂诱导浮选氧化矿的作用机理分析表明, 硫化剂起作用的主要组分是HS^-, NaHS与Na₂S对浮选回收铜都表现出了很好的适应性, 但在相同用量条件下, NaHS由于能够在钴矿物表面形成更加稳定的金属硫化物膜, 因而对钴的浮选回收效果更好。

Sulfidisation Mechanism and Reasonable Mineral Processing Technology of a Composite Copper-cobalt Ore

Using sodium hydrosulfide as the sulfidisation reagent, sodium silicate and CMC as the combined depressant, Y-89 as the collector and MIBC as the frother, a flowsheet consisting of a pre-flotation desilming and a NaHS-induced simultaneous flotation has been selected to treat a composite copper-cobalt ore. When the grades of copper and cobalt are 1.14% and 0.18% for the run-of-mine ore, the copper grade and recovery in the concentrate attained 24.78% and 72.66%, respectively, while the cobalt grade and recovery reached 2.75% and 51.10%, respectively. According to the mechanism analysis on the sulfidisation reagent induced flotation of oxide ore, HS^- is the most functional component in sulfidisation reagents. Both NaHS and Na₂S show excellent adaptability in the flotation of copper minerals, but with the same dosage, the cobalt minerals can be better recovered by the former as a much more stable metal sulfide film can be formed on the surface of cobalt minerals.