有机浮选剂对金的氰化溶解和活性炭吸附都有干扰作用。氰化之前除去浮选药剂的方法之一就是用亚硫酸盐和空气氧化。在pH7,不存在硫代硫酸盐的情况下,浓度为10ppm的黄药溶液在2h内被氧化.最终产物为CO_2、硫代硫酸根离子和相应的醇。在浮选尾矿浆中,黄药先从矿粒上解吸下来,然后被氧化。在pH7,有硫代硫酸盐存在的情况下,黄药部分转化成黄原酸基硫代硫酸盐(X·S_2O_3~-)。此过程需8h。矿浆中加入石灰能使X·S_2O_3~-分解成黄药,并可将矿粒上的黄药解吸出来,然后被氧化. 起泡剂甲基异丁基卡必醇(MIBC)的氧化速度很慢。如果要完全除去,只有空气通过矿浆鼓泡,大约要7h才能使它的浓度从20ppm下降到2ppm。 Organic flotation agent on gold cyanide dissolution and activated carbon adsorption have interference. One of the ways to remove flotation agents prior to cyanidation is to oxidize with sulphite and air. In the absence of thiosulfate at pH 7, the xanthate solution at a concentration of 10 ppm is oxidized within 2 h.The final products are CO 2, thiosulfate ions and the corresponding alcohols. In the flotation tailings slurry, xanthate is desorbed from the pellets and then oxidized. In the presence of thiosulfate at pH 7, xanthate is partially converted to xanthogenate thiosulfate (X.S_2O_3 ~ -). This process takes 8h. The addition of lime to the pulp can decompose X · S_2O_3 ~ into xanthate and desorb the xanthate on the ore particles and then oxidize it. The oxidation rate of MIBC is very high SLOW. If it is to be completely removed, only air bubbling through the slurry will reduce its concentration from 20 ppm to 2 ppm in about 7 h.