锌精矿降硅工艺条件试验研究与生产实践

针对乌拉根铅锌矿生产现场锌精矿含硅高的问题，进行了降低锌精矿硅含量的小型试验研究.结果表明：水玻璃对石英、长石和黏土等硅酸盐矿物具有较强的抑制和分散作用.在水玻璃、硫酸铜和丁基黄药的用量分别为300 g/t、150～250 g/t和50～80 g/t，磨矿细度为小于0.074 mm 占49.50%～54.50%，浮选浓度为37%～40%条件下，可获得锌回收率68.84%、锌品位56.16%、锌精矿硅含量为6.45%的较好指标.经生产验证：锌精矿硅含量可由11.37%降低到7.16%.

Experiment research of technology condition and production practice to silicon content reduction in zinc concentrate

To solve the problem of high content of silicon in the zinc concentrate in Wulagen lead and zinc ore, a small experimental study to reduce the silicon content in zinc concentrate is made. The test result shows that silicate having strong inhibition and dispersion for quartz, feldspar and clay. A proper index of zinc recovery 68.84 %, zinc grade 56.16 %, silicon content 6.45 in zinc concentrate is achieved under the condition of sodium silicate 300 g/t, copper sulphate 150~250 g/t, butyl xanthate 50~80 g/t, the -0.074 mm size-fractionated of grinding fineness accounting for 49.50 %~54.50 %. Production practice shows that the silicon content of zinc concentrate can be reduced from 11.37% to 7.16 %.