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目前,世界约30%的金资源属于难处理硫化矿。据估计,现在世界金产量的1/3产自难处理金矿床。现状国外主要预处理工艺应用的现状简介如下: 焙烧法焙烧技术发展超势是:焙烧设备由移动床转向沸腾床;单炉焙烧转向双炉焙烧;烧煤、烧气等外加势转向自热;烟尘处理由烟气效空转向回收As_2O_3及SO_2以及加盐固砷固硫焙烧。 1988年在南非New Consert建立了处理含砷金精矿的两段沸腾焙烧新型提金厂,其特点是回收As_2O_3及利用SO_2,但金的回收率仅为85%,且给料中砷含量不切高,矿石中碳对金的回收率有影响。为了提高金
At present, about 30% of the world’s gold resources are refractory sulfide ores. It is estimated that 1/3 of the world’s gold output now comes from refractory gold deposits. The current status of the application of the main pretreatment technology abroad are as follows: roasting roasting technology development potential is: roasting equipment from the moving bed to the ebullated bed; single furnace roasting shift to double furnace roasting; burning coal, Soot treatment turned to recovery of As_2O_3 and SO_2 from flue gas and the effect of salt and nitrogen fixation on sulfur fixation roasting. A new two-stage roasting roasting plant for the treatment of arsenic-bearing gold concentrates was established in 1988 in New Consert, South Africa, which features the recovery of As_2O_3 and the use of SO_2 but with a gold recovery of only 85% and the arsenic content in the feed not Cut high, the impact of carbon recovery of gold in gold. In order to raise gold