CAJ | 학술논문

对镍铁矿原料及不同温度还原焙砂进行矿物学研究,探究镍铁矿选择性还原焙烧发生的相变.研究结果表明：镍铁矿主要金属矿物为褐铁矿,其次为赤铁矿；Ni 在不含锰的铁矿物中分布较均匀,而在含 Mn 的铁矿物中分布相对集中,并与 Mn伴生.镍铁矿在还原焙烧过程中 Fe、Ni 和 Co 随温度升高逐渐发生还原、相转化和迁移富集的过程.选择性还原焙烧必须严格控制焙烧温度,要达到 Ni、Co 和 Fe 的选择性还原并形成 Ni 高、Fe 低的合金相和磁铁矿,焙烧温度采用750℃较合适,在该温度下形成的合金相组成为55.55% Ni、9.86% Co 及33.99% Fe,Ni 的金属转化率为88.49%,铁氧化物主要为磁铁矿.
대얼철광원료급불동온도환원배사진행광물학연구,탐구얼철광선택성환원배소발생적상변.연구결과표명：얼철광주요금속광물위갈철광,기차위적철광；Ni 재불함맹적철광물중분포교균균,이재함 Mn 적철광물중분포상대집중,병여 Mn반생.얼철광재환원배소과정중 Fe、Ni 화 Co 수온도승고축점발생환원、상전화화천이부집적과정.선택성환원배소필수엄격공제배소온도,요체도 Ni、Co 화 Fe 적선택성환원병형성 Ni 고、Fe 저적합금상화자철광,배소온도채용750℃교합괄,재해온도하형성적합금상조성위55.55% Ni、9.86% Co 급33.99% Fe,Ni 적금속전화솔위88.49%,철양화물주요위자철광.
Mineralogical studies on catarinite raw ore and reduced samples at different temperatures were carried out, and phase transformation was explored in the catarinite selective reduction roasting process. The results show that the main metal minerals in the catarinite are limonite and then hematite. The distribution of Ni in Mn-free iron minerals is relatively homogeneous, but it is relatively concentrated in Mn-contained iron minerals, and Ni is associated with Mn. Reduction, phase transformation, migration and enrichment of Fe, Ni and Co gradually occur in the process of catarinite reduction roasting with increasing temperature, so the selective reduction roasting temperature should be controlled strictly. To reduce Ni, Co and Fe selectively and form a more Ni and less Fe alloy phase and magnetite, 750 ℃ is a proper roasting temperature, at which the formed alloy phase contains Ni of 55. 55% , Co of 9. 86% and Fe of 33. 99% averagely, the metal conversion rate of Ni is 88. 49% , and the iron oxide is mainly magnetite.