含镍蛇纹石浮选降镁过程的研究

以四川会理蛇纹石为原料,采用还原硫化的方法将氧化镍转化为硫化镍,然后在pH值为3~5、丁黄药添加量为1667g/t、Z-200(乙基硫氨酯)添加量为1mL的条件下,研究降镁抑制剂CMC(羧甲基纤维素)、六偏磷酸钠、硫酸铜、硫化钠的添加量对浮选精矿中镁含量的影响。在适宜的浮选条件下,精矿中镁的含量可降低至7.15%。将浮选精矿分三段酸浸,可使镍的品位提高至4.275%,与直接酸浸法相比其耗酸量减少50%,大幅度降低了环境污染。

Research on the Process of Decreasing Magnesium in Flotation about Containing Nickel Serpentine

The serpentine in Huili Sichuan province of China is selected as raw materials in this study. Nickel oxide ore had been transformed into nickel sulfide by reduction-vulcanization. Decreasing magnesium inhibitors such as CMC (carboxymethyl cellulose ), sodium hexametaphosphate, copper sulfate, sodium sulfide had been studied in the condition of pH was 3 to 5, the dosage of butyl xanthate was 1667g/t, the dosage of Z-200 ( ethyl thionocarbamate ) was 1 mL by the effect on the dosage of magnesium content in the flotation concentrate. Magnesium content in the flotation concentrate could decrease to 7.15% at a proper flotation condition. Nickel content could increase to 4.275% after being acid leaching. Compared with direct acid leaching, the amount of acid could be decreased 50%, and the environmental pollution decreased significantly.