摘要
铜钼矿的分离是选矿工艺的难题。研究高效、低毒、环境污染小的巯基乙酸钠具有更好的经济效益和环境效益。研究了巯基乙酸钠海波法合成工艺,确定了最佳工艺为制盐pH为7.5,缩合反应温度为70℃,巯化反应温度为20℃,所得最高收率为96.56%。对自制的产品进行红外光谱分析,并用自制的巯基乙酸钠作为浮选抑制剂进行粗选实验。研究结果表明,随着巯基乙酸钠用量的增加,矿浆电位不断下降,pH不断上升。加入0.5 kg/t的巯基乙酸钠,钼品位由原来的0.62%上升到3.21%,而回收率提高到80.71%。巯基乙酸钠用量为2.5 kg/t时,钼回收率和精矿钼品位分别达到91.92%和5.56%。说明自制的巯基乙酸钠对铜钼矿具有良好的抑铜浮钼能力。
The separation of copper and molybdenum from copper molybdenum ore is a challenge in mineral processing. Sodium thioglycolate is a preferable chalcopyrite inhibitor in molybdenite dressing due to its high efficiency, low toxicity and environmental friendly. The synthesis of sodium thioglycolate is studied by sodium thiosulphate in this study. The optimal synthesis conditions are as follows：7.5 of pH,70℃ of temperature of condensation reaction and 20℃of thiolation reaction temperature. The yield of sodium thioglycolate can reach 96. 56%. The chemical structure of obtained products is confirmed by infrared spectrum. The flotation of copper-molybdenum ore are conducted using the obtained products as inhibitor. The results show that, when the dosage of sodium thioglycolate is 0. 5 kg/t, the concentration of molybdenum increases from 0. 62% to 3.21% and the recovery rate of molybdenum reached 80.71%. When the dosage of sodium thioglycolate is 2. 5 kg/t ,the recovery rate of molybdenum and concentration of molybdenum is 91.92% and 5.56%, respectively. It suggests that the home-made sodium thioglycolate possesses high inhibiting ability towards copper molybdenum ore.
出处
《现代化工》
CAS
CSCD
北大核心
2013年第2期46-48,50,共4页
Modern Chemical Industry
基金
中央高校基本科研业务费专项资金(N110302002)
关键词
巯基乙酸钠
合成
铜钼分离
抑制剂
sodium thioglycolate
synthetic
separation process of copper and molybdenum
inhibitor
