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进行了大量试验研究,以确定加盐焙烧-水浸法从含有大量伴生闪锌矿的低品级铜精矿(来自Sikkim)中回收铜的可行性。采用20％(重量)NaCl、6mm床深和1L/min空气流速,在350℃下对精矿处理3h,可浸出95％的铜和97％的锌。通过X射线衍射对加盐焙烧后的焙砂进行矿物相的鉴定,废气和反应器冷凝物的分析,以及浸出液中氯化物与硫酸盐比值的测定,指出硫化物精矿的加盐焙烧是一种非常复杂的化学过程。
Extensive experimental studies were conducted to determine the feasibility of salt roasting-flooding recovery of copper from low-grade copper concentrates (from Sikkim) containing a large amount of associated sphalerite. The concentrate was treated for 3h at 350 ° C with 20% NaCl, 6mm bed depth and 1L / min air flow, leaching 95% copper and 97% zinc. X-ray diffraction of calcined roasted calcine mineral phase identification, exhaust gas and reactor condensate analysis, as well as the leachate chloride and sulfate ratio determination, pointed out that the sulfide concentrate roasting salt is a Very complex chemical process.