(福州大學(xué) 紫金礦業(yè)學(xué)院，福州 350116)
摘 要: 采用常規(guī)顎式破碎機(jī)和高壓輥磨機(jī)破碎設(shè)備，開展兩種不同破碎方式下金礦石柱浸試驗，研究不同破碎方式對較粗粒級金礦石堆浸效果的影響，并結(jié)合破碎產(chǎn)品特性及顯微分析技術(shù)，進(jìn)一步探究高壓輥磨方式在金礦石處理中的作用機(jī)理。結(jié)果表明:高壓輥磨機(jī)較常規(guī)顎式破碎機(jī)產(chǎn)品粒度略細(xì)，顆粒表面裂紋更加豐富、堆浸體系飽和含水率較高，高壓輥磨機(jī)對改善堆浸體系滲透效果和提高浸出率的效果明顯；在相同條件下，試驗金礦石浸出率提高約3.5%~6.8%，浸出劑耗量減少3.2%~11.3%。
關(guān)鍵字: 破碎方式；高壓輥磨機(jī)；堆浸；微裂紋；飽和含水率
（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
