Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第26卷    第7期    总第208期    2016年7月

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文章编号:1004-0609(2016)-07-1531-07
高压辊磨对金矿石堆浸效果的影响机理
唐 远,印万忠,马英强,迟晓鹏,黄发兰

(福州大学 紫金矿业学院,福州 350116)

摘 要: 采用常规颚式破碎机和高压辊磨机破碎设备,开展两种不同破碎方式下金矿石柱浸试验,研究不同破碎方式对较粗粒级金矿石堆浸效果的影响,并结合破碎产品特性及显微分析技术,进一步探究高压辊磨方式在金矿石处理中的作用机理。结果表明:高压辊磨机较常规颚式破碎机产品粒度略细,颗粒表面裂纹更加丰富、堆浸体系饱和含水率较高,高压辊磨机对改善堆浸体系渗透效果和提高浸出率的效果明显;在相同条件下,试验金矿石浸出率提高约3.5%~6.8%,浸出剂耗量减少3.2%~11.3%。

 

关键字: 破碎方式;高压辊磨机;堆浸;微裂纹;饱和含水率

Influence mechanism of high pressure grinding rolls on heap leaching of gold ore
TANG Yuan, YIN Wan-zhong, MA Ying-qiang, CHI Xiao-peng, HUANG Fa-lan

College of Zijin Mining, Fuzhou University, Fuzhou 350116, China

Abstract:Through the column leaching experiments of low grade gold ore crushed by conventional jaw crusher and high pressure grinding rolls (HPGR), the influences of coarse particles processed by two different comminuting methods on the leaching rate were studied. Combined with the characteristics of products and microscopic analyses technology, the mechanism of HPGR method in the treatment process of gold ore was discussed furthermore. The results show that the products of HPGR are finer and containing richer micro cracks on particle surface and have higher saturated water content than that of conventional jaw crusher. HPGR can play a significant role in strengthening the penetration effect of heap leaching which can help to improve the leaching rate of gold ore at the same time. Under the same conditions, gold leaching rate of HPGR method can be improved by 3.5%-6.8%, meanwhile, the consumption of leaching solution is decreased by 3.2%-11.3%.

 

Key words: comminuting methods; high pressure grinding rolls; heap leaching; micro crack; saturated water content

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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