Flotation behaviors and mechanisms of chalcopyrite and galena after cyanide treatment

经氰化处理的黄铜矿和方铅矿的浮选行为与机理（英文）

Adsorbing tests between CN? and chalcopyrite or galena were conducted firstly, and then flotation tests of the twocyaniding minerals were investigated in butyl xanthate (BX) system. Results showed that the interaction between CN? and the twomineral surfaces were both chemical adsorption and can be described by the Langmuir adsorption isotherm model. In the optimumcondition of pH 6.5 and 4.0 mg/L BX, the recovery of cyaniding chalcopyrite and galena reached 82.1% and 63.9%, respectively. BXimproved the hydrophobicity of the surfaces of the two minerals, although CN? reduced the contact angle on the surface of minerals.The inhibitory effect of CN? on chalcopyrite far outweighed galena. Electrostatic adsorption exists in the interaction between BX andthe surface of galena after cyanide treatment in the pH range of 4.2?8.4, while the interactions between BX and the surface ofchalcopyrite after cyanide treatment is chemical adsorption.

研究了CN^-与黄铜矿和方铅矿之间的吸附作用,然后在丁基黄药(BX)体系下研究了氰化吸附后的黄铜矿、方铅矿的浮选试验。结果表明,CN^-与两种矿物表面存在化学吸附作用,并可用Langmuir等温模型近似描述。在pH值为6.5,丁基黄药用量为4.0 mg/L的适宜条件下,氰化后的黄铜矿和方铅矿的浮选回收率可分别达到82.1%和63.9%。尽管CN^-降低了黄铜矿、方铅矿表面的接触角,但丁基黄药能够提高氰化矿物表面的疏水性。CN^-对黄铜矿的抑制作用大于方铅矿。在pH值为4.2~8.4时,BX与氰化后的方铅矿表面的相互作用存在静电吸附;BX在氰化后的黄铜矿表面的吸附作用为化学吸附。