CAJ | 학술논문

以含Ni1.93%、Fe14.25%的红土镍矿为对象，分别采用A、B两种烟煤作为还原剂，研究了焙砂的主要矿物组成和不同烟煤粒度对镍矿预还原的影响。结果表明：焙砂中大多数镍铁合金呈分散状态，晶粒细小，铁氧化物呈星点状弥散状态。对于挥发分较低的烟煤，粒度越小，气化速度越快，越有利于镍矿的预还原；但对于挥发分较高的烟煤，适当增加大粒度的比例可以提高挥发分挥发的温度，充分利用挥发分促进镍矿的预还原。
이함Ni1.93%、Fe14.25%적홍토얼광위대상，분별채용A、B량충연매작위환원제，연구료배사적주요광물조성화불동연매립도대얼광예환원적영향。결과표명：배사중대다수얼철합금정분산상태，정립세소，철양화물정성점상미산상태。대우휘발분교저적연매，립도월소，기화속도월쾌，월유리우얼광적예환원；단대우휘발분교고적연매，괄당증가대립도적비례가이제고휘발분휘발적온도，충분이용휘발분촉진얼광적예환원。
The experiment was done with nickel laterite of 1.93% Ni and 14.25% Fe as sample and two different types of bitumite of A and B as the reductant.The major mineral composition of calcine and the influence of different bitumite particle size on reduction of nickel laterite were studied. The result showed that most of nickel-iron was in decentralized state and the grain size was relatively small. Besides, the distribution of iron oxide was star-shaped. For low volatile bitu-mite, the smaller the particle size is, the faster the gasification is, which is conducive to the pre-reduction of nickel ore. But for a high volatile bitumite, increasing the proportion of large-grained bituminous coal can raise the volatilization temperature of the volatile and the released volatile is fully utilized to promote the pre-reduction of nickel ore.