氰化浸金活性炭吸附金容量的研究

根据黄金行业自身特点,模拟黄金提取过程中的氰化浸金环境,研究活性炭吸附金能力的测定方法.通过实验确定活性炭类型为椰壳炭,并对影响因素进行了优化,确定最佳条件为活性炭粒度200目,吸附液中氰化钠质量分数为0.05%,体积为150 mL,pH值为11.5,吸附时间为16 h,温度为(25±1)℃,振荡器转速为200 r/min.该方法测定结果的相对标准偏差为3.81%,准确度为95.20%~99.98%,为黄金行业直接、客观评价活性炭吸附金能力提供可靠方法.

Study on the adsorption capacity of activated carbon for cyanide leaching of gold

According to the characteristics of gold industry ,the cyanide leaching conditions for gold extraction is simulated ,based on which the gold adsorption capacity of activated carbon is studied .Coconut shell charcoal is select-ed for experimental research .The experimental conditions has been optimized in this method .The optimum condition has been determined:activated carbon particle size was 200 mesh;concentration of sodium cyanide in the adsorption solution was 0 .05 %,the volume was 150 mL and the pH was 11 .5; adsorption time was 16 h and the temperature was (25 ±1) ℃;rotational speed was 200 r/min.The RSD of the determination results of the method was 3.81 %and the accuracy was 95 .20%–99 .98 %.The study provided a reliable method to make direct and objective evalu-ation on the gold adsorption capacity of activated carbon for gold industry .