高硅锌精矿焙烧过程及硅的行为

Study on Roasting Process and Silicon Behavior of High-silicon Zinc Concentrate

锌精矿中的硅在焙烧条件下,部分转变为可溶硅,在酸性条件下易被浸出,在特定的条件下生成硅溶胶或凝胶,严重影响澄清效果和过滤性能。针对某地高硅锌精矿,研究焙烧工艺参数对可溶硅的影响规律和二氧化硅在焙烧过程中的行为,通过控制合适的焙烧工艺条件,抑制可溶性硅酸盐的产生,为高硅锌精矿焙烧工艺的确定提供依据。

The silicon in zinc concentrate is partially transformed into soluble silicon under roasting conditions,which is easy to be leached out during acidic conditions.The formation of silica sol or even gel under specific conditions seriously affects the clarification effect and filtration performance.In this paper,the effect of roasting process parameters on soluble silicon and the behavior of silica in the roasting process of a certain high-silicon zinc concentrate were studied.By controlling appropriate roasting process conditions,the production of soluble silicate was inhibited,which provided a basis for the determination of high-silicon zinc concentrate roasting process.