几种离子对氨法制备氧化铁红晶种的影响

Effects of several ions on the morphology of iron oxide red seeds produced by ammonium process

摘要: 结合河南中原黄金冶炼厂用氨法制备氧化铁红存在的问题,研究了水中钙离子、镁离子和锌离子对氨法制备氧化铁红晶种的影响.结果表明,三种离子都对晶种制备过程有影响,但影响的程度不同.三种离子的质量浓度影响晶种制备效果的上限分别为锌离子0.04 g·L^-1、镁离子0.25 g·L^-1和钙离子0.1 g·L^-1.在水中添加氨水按时进行沉淀可以有效地消除钙离子、镁离子的影响.

Abstract: The effects of Ca²⁺, Mg²⁺, and Zn²⁺ ions on the morphology of iron oxide red seeds produced by ammonium process were studied according to the situation in Zhongyuan Gold Smelter. It is shown that the presence of Ca²⁺, Mg²⁺ and Zn²⁺ ions has influence on the color, composition and morphology but their influencing degrees are different. The maximum concentrations influencing the seed quality are 0. 04g·L^-1 for Zn²⁺, 0. 25g·L^-1 for Mg²⁺, and 0. 1 g·L^-1 for Ca²⁺, respectively. The results also reveal that the treatment of tap water by adding ammonia water can eliminate the influences of Mg²⁺ and Ca²⁺ ions.