高压辊磨破碎原生金矿的柱浸试验

Experiment of Column Leaching of Primary Gold Ore by High Pressure Roller Grinding

本文围绕澳洲某低品位原生金矿的堆浸技术开发,开展了常规破碎与高压辊磨破碎样品的制粒柱浸试验,讨论了高压辊磨机引入低品位原生金矿堆浸项目的经济性。结果表明:相比常规破碎方法,高压辊磨机破碎效率高,在相同检查筛分(12.5mm)条件下,-500μm细粒级部分产率高出20个百分点。在相同浸出条件下,高压辊磨破碎样品的柱浸尾渣品位低0.07g/t,通过350万t/年堆浸项目研究案例,相比常规三段破碎方案,采用高压辊磨破碎工艺方案的t矿毛利将增加13.7RMB/t。

The paper focuses on the heap leaching technology in a low-grade fresh gold mine development project in Australia, and conducts the column leaching testwork for conventional crushing and HPGR crushing samples, and discusses the economics of utilizing HPGR to low-grade fresh gold heap leach project. The test results show that compared with the conventional crushing method, the crushing efficiency of the high-pressure roller mill is much higher. Under the same checkscreening with the aperture size of 12.5 mm, the yield of the -500 μm size fraction is higher by 15 percentage points. Under the same leaching conditions, the column leaching tailings of HPGR crushing samples are decreased by 0.07 g/t. In the case of 3.5 million tonnes per annum heap leach project, the gross profi t per tonne of HPGR crushingoption is 13.7 RMB/t higher than that of conventional crushing option.