关键词: 铜尾矿, 铜精矿, 综合利用, 烧结砖

Abstract: With the purpose of comprehensive utilization of copper tailings, a reasonable process and some parameters are determined to further get copper concentrate from copper tailings by flotation process. The grade of the copper concentrate reaches up to 15.83%, and the recovery to 72.61%, improving the utilization efficiency of resources. Then the copper tailings are used as the main raw material and the gangue as cementing agent to produce fired bricks for buildings. And some researches on the mixture ratio, sintering temperature and holding time are carried out. Then the optimum conditions are determined as the ratio of the copper tailings and gangue 7∶3, the sintering temperature 950 ℃, and the holding time 1.5 h. The strength of the product can reach the MU20-class of the GB5101-2003 quality standards.

Key words: Copper tailings, Copper concentrate, Comprehensive utilization, Fired brick