CAJ | 학술논문

对红土镍矿堆浸／搅拌浸出工艺进行了中试研究，红土镍矿经洗矿分级后，＋0．25 mm粗粒级矿石进行堆浸，－0．25 mm细粒级矿石常压搅拌浸出。结果表明：在堆高4 m，酸耗700 kg／t，浸出时间142 d的柱浸条件下，Ni累计浸出率约80％；在酸耗850 kg／t，浸出时间3．5 h，浸出温度90～95℃，矿浆浓度26％的搅拌浸出条件下，Ni浸出率可以达到85％以上。
대홍토얼광퇴침／교반침출공예진행료중시연구，홍토얼광경세광분급후，＋0．25 mm조립급광석진행퇴침，－0．25 mm세립급광석상압교반침출。결과표명：재퇴고4 m，산모700 kg／t，침출시간142 d적주침조건하，Ni루계침출솔약80％；재산모850 kg／t，침출시간3．5 h，침출온도90～95℃，광장농도26％적교반침출조건하，Ni침출솔가이체도85％이상。
A pilot experiment was conducted on processing of nickel laterites with a combined process consisting of heap leaching and atmospheric tank leaching( ATL) . After stages of scrubbing and screening, the ore was classified into two size fraction, one with size of+0.25 mm as feed to heap leach and another size of-0.25 mm as feed to atmospheric tank leach . It was found that the accumulated extraction rate of Ni was about 80% after column leaching with heap height of 4 m, acid consumption at 700 kg/t and leaching time of 142 d. However, the extraction rate of Ni after ATL could exceed 85% with acid consumption of 850 kg/t, leaching temperature of 90~95 ℃ and leaching time of 3. 5 h, at pulp density of 26%.