The problem of high iron content in zinc concen-trate can not be resolved by single floatation flowsheet because theiron content of sphalerite contaminated in pyrite is high.

• 由于东升庙硫铁矿共生闪锌矿的含铁量高，所以采用单一浮选流程不能解决锌精矿铁杂质含量高的问题。