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近两年来,我们在用非氰、非铬药剂分选铜铅混合精矿的新工艺试验中,发现以焦磷酸钠,特别是它与 CMC 组成的合剂作为方铅矿的选择性抑制剂,取得了良好的分离效果。例如,当铜铅混合精矿含铅64％左右,含铜4.4％时,分选后铜精矿品位为27.65％,含铅2.2％,铜回收率96％;铅精矿品位75％,含铜0.208％,铅回收率99.47％。在此项研究中发现,焦磷酸钠用量、焦磷酸钠与 CMC 的比例及其用量、CMC 牌号、药剂作用时间等,对铜铅混合精矿的浮选分离都有着重要影响。不同药方浮选分离铜铅混合精矿的试验结果表明,焦磷酸钠,尤其是焦磷酸钠与 CMC 组成合剂的分选结果,均优于 CMC 和重铬酸盐的分选效果。此项研究成果,已应用于选矿厂生产。
In the past two years, we have found that sodium pyrophosphate, especially its combination with CMC, is a selective inhibitor of galena in the new process of separating non-cyanide and non-chromium chemicals from copper-lead mixed concentrates. Achieved a good separation effect. For example, when the copper-lead mixed concentrate contains about 64% lead and 4.4% copper, the grade of copper concentrate after sorting is 27.65%, the lead content is 2.2% and the copper recovery is 96%; the grade of lead concentrate is 75% 0.208% copper, lead recovery 99.47%. In this study, it was found that the dosage of sodium pyrophosphate, the ratio of sodium pyrophosphate and CMC, the dosage of CMC, the age of the agent and so on, all have an important influence on the flotation separation of copper-lead mixed concentrates. The results of the flotation separation of copper-lead mixed concentrates by different prescriptions show that the separation results of sodium pyrophosphate, especially sodium pyrophosphate and CMC, are superior to those of CMC and dichromate. The research results have been applied to the concentrator production.