煤矸石酸浸除铁及废液利用的实验研究

Research on the iron removal from gangue by acid leaching and the utilization of waste liquid

对六盘水矿区高铁的煤矸石采用低温焙烧后,进行酸浸除铁,获得的优化除铁条件是:用18%的硫酸,固液比为1∶8,在350℃焙烧2 h,在90℃酸浸2.5 h,除铁率达到95%以上,并利用酸浸废液制备了氧化铁红。

The gangue with high iron contents in Liupanshui mining area was removed iron by acid leaching after low temperature baking,then the optimal conditions were obtained as follows：the sulfuric acid concentration was 18%,the solid-liquid ratio was 1 ∶8,baking at 350 ℃ for 2 h and acid leaching at 90 ℃ for 2.5 h,the iron removal ratio was more than 95%,finally the waste liquid of acid leaching was used to synthesize iron oxide red.