破碎方式对邦铺钼铜矿石可磨性及钼浮选的影响

分别采用高压辊磨工艺和传统破碎工艺将西藏墨竹工卡县邦铺钼铜矿石破碎到-3.2 mm，分析了两种破碎产品的粒度特性，测定了两种破碎方式下矿石的 Bond球磨功指数，考察了两种破碎方式对后续球磨-钼浮选的影响。结果表明：高压辊磨产品比传统破碎产品细粒级含量多且粒度分布更均匀；高压辊磨产品在不同目标粒度下的Bond 球磨功指数比传统破碎产品至少降低9.05%；高压辊磨产品和传统破碎产品浮选钼的最佳磨矿细度分别为-0.074 mm占65%和75%，相应地，前者的Bond球磨功指数比后者降低10.87%，但浮钼回收率减少2.32个百分点。

Effect of Different Comminuting Process on Grindability and Molybdenum Flotation of Bangpu Mo-Cu Ore

Bangpu molybdenum-copper ore from Mozhugongka County, Tibet was crushed by high pressure grinding rolls(HPGR) and the traditional jaw crusher. The particle size characteristics of the two crushing products were analyzed, the work indexes of ball mill for two different crushing manner were measured, and the effect on subsequent ball milling-molybdenum flotation by different comminuting manner were studied. The results showed that the fine fraction content of crushing products by HPGR is much more than that by jaw crusher and its particle size distribution is more uniform. The Bond work index of ball mill for the products by HPGR is at least 9.05% lower than that by jaw crusher. The best grinding fineness by HPGR is 65% of the products lower than 0.074 mm, while that by jaw crusher is 75% lower than 0.074 mm. Meanwhile, the Bond work index of ball mill by HPGR is 10.87% lower than that by jaw crusher, but molybdenum recovery by HPGR decreases by 2.32%.