论文部分内容阅读
采用ＴＧ－ＤＴＡ热分析法、Ｘ射线衍射法对黄金洞焙砂的结构进行了研究，结果表明，黄金洞焙砂中仍含有８％的硫，并以单质硫，Ｆｅ１－ｘＳ，Ｆｅ１－ｘ－ｙＳ和ＦｅＳ２等形式存在。由于硫化物包裹的金不能暴露于氰化液中，以及这些物质的存在会大量消耗氰化过程中所需要的氧，因而导致黄金洞焙砂浸金率低。而此焙砂分别经３００℃，５８０℃焙烧处理后，焙砂氰化浸金率相应地提高到９１．７％和９３％。因此黄金洞焙砂浸金率低的原因是脱硫阶段氧化气氛不足，脱硫不完全，是焙砂欠烧而非过烧造成的。
The structure of the gold cave calcine was studied by TG-DTA thermal analysis and X-ray diffraction. The results show that the gold cave calcine still contains 8% sulfur and the elemental sulfur, Fe1-xS, Fe1-x -yS and FeS2 and other forms exist. Because sulphide-coated gold can not be exposed to cyanide liquor, and the presence of these substances can consume large amounts of oxygen required for the cyanidation process, gold burns have a low rate of gold impregnation. After calcination at 300 ℃ and 580 ℃ respectively, the calcination rate of cyanide cyanide increased to 91.7% and 93% respectively. Therefore, the reason for the low rate of golden hole burnt gold leaching is due to the insufficient oxidizing atmosphere in the desulfurization stage and the incomplete desulfurization, which is caused by the burnt stone not burning but burning excessively.