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为了回收黄铁矿基质中的金，我们采用几种冶金方法进行试验研究。首先将矿石磨碎至P80=75μm，经过24h直接氰化浸出，金的回收率仅为33％。为了提高金的回收率，将矿石细磨至P80=53μm和P80=38μm，直接氰化浸出仍然没有效果，金的最高回收率也仅为35％。其次将矿石放在650℃的温度下焙烧，焙砂经过24h的氰化浸出，金的回收率高达98％，最后将矿石放在高压釜内的O2／H2SO4／HC1／NaC1系统中。在此系统中，矿石的氧化和金的溶解同时发生。结果显示，在温度为180℃～200℃的条件下，矿石经过1．5h～2h的氧化浸出，金的回收率高于90％，同时，这个系统可以避免处理高压釜氧化渣的过程，显示出在高压釜内直接溶解金的巨大潜力。
In order to recover the gold in the pyrite matrix, we used several metallurgical methods for experimental studies. The ore was first pulverized to P80 = 75 μm, and after 24 h direct cyanidation, the gold recovery was only 33%. In order to improve the recovery of gold, the ore finely pulverized to P80 = 53μm and P80 = 38μm, direct cyanide leaching still no effect, the maximum recovery rate of gold is only 35%. Secondly, the ore was calcined at a temperature of 650 ° C. After calcination for 24 h, cyanidation was performed to recover the gold up to 98%. Finally, the ore was placed in the O2 / H2SO4 / HC1 / NaC1 system in an autoclave. In this system, the oxidation of ore and the dissolution of gold take place simultaneously. The results show that under the condition of temperature from 180 ℃ to 200 ℃, the ores are leached by oxidation for 1.5h ~ 2h, the recovery rate of gold is higher than 90%. At the same time, this system can avoid the process of treating autoclave oxidation residue, Great potential for direct dissolution of gold in an autoclave.