Pressure oxidation is a hydrometallurgical oxidative pretreatment for refractory ores, such as sulfide ores. Here, simultaneous alkaline pressure oxidation and sodium cyanide leaching treatments were carried out on a pyritic ore from the Mulatos Mine located in Sahuaripa, Sonora, Mexico. Mineral characterization, agitation leaching, hot cyanidation under atmospheric pressure conditions, simultaneous moderated pressure oxidation and leaching, and kinetic testing results are shown. The modified variables were temperature, pressure, and cyanide concentration. Characterization indicated that pyrite was the main mineral. Simultaneous pressure oxidation and leaching experiments were conducted at a temperature range of 40–80 °C, oxygen pressure of 87.5–200 psi, and cyanide concentration of 0.8–1.2 wt% in a 2-L Parr pressure reactor. A dissolution rate of 81–86% was achieved under the following conditions: 87.5 psi, 80 °C, 0.8 wt% NaCN, for 1 h.

中文翻译：

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常规浸出与同时加压浸出/氧化法从难选黄铁矿中提取金的对比研究

加压氧化是对难熔矿石，如硫化矿石的湿法冶金氧化预处理。在这里，对来自墨西哥索诺拉州萨瓦里帕的穆拉托斯矿的黄铁矿矿石同时进行碱性压力氧化和氰化钠浸出处理。显示了矿物表征、搅拌浸出、常压条件下的热氰化、同步缓压氧化和浸出以及动力学测试结果。修改后的变量是温度、压力和氰化物浓度。表征表明黄铁矿是主要矿物。在 2-L Parr 压力反应器中，在 40-80 °C 的温度范围、87.5-200 psi 的氧气压力和 0.8-1.2 wt% 的氰化物浓度下同时进行压力氧化和浸出实验。