With the flotation flowsheet of one roughing and one cleaning, and the addition of a depressant (carboxymethyl cellulose, CMC) during cleaning process, the ash content of the final product.

• 某铜矿通过对浮选工艺的技术改造 :采取提高磨矿细度、增加二次精选及采用高效药剂等措施 ,使选矿技术指标得到了显著提高。