摘要
进行了转底炉直接还原一电炉熔炼处理红土镍矿的中试研究,考察了还原温度、还原时间、煤配比和石灰石配比对镍、铁金属化率和回收率的影响,得出最佳还原方案以指导工业生产。研究表明:还原温度1 300℃、还原时间20 min、煤配比1.0%、石灰石配比6%时,镍铁金属化率和回收率最高,金属化率分别为68.61%、91.22%,回收率分别为81.76%、91.66%。红土镍矿在此条件下还原后再在1 450℃熔炼,得到的镍铁合金品位较高,为镍10.77%、铁82.00%,可满足不锈钢、合金钢与合金铸铁工业生产对镍合金原料的要求。
The pilot study of direct reduction with rotary hearth furnace-electric furnace smelting of nickel laterite ore was conducted. The effects of reduction temperature, reduction time, the ratio of coal and limestone mixture on nickel and iron metallization ratio and recovery were investigated, and the optimal reduction plans were obtained to guide the industrial production. The results show that when the reduction temperature is 1 300 ℃ , reduction time is 20 min, coal ratio is 1.0% , and limestone ratio is 6% , the ferronickel metallization ratio and recovery ratio rea- ches a maximum, the metallization ratio are 68.61% and 91.22% , respectively, and the recoveries 81.76% and 91.66% , respectively. After reduction under these conditions, the nickel laterite ore was smelted at 1 450 ℃ , and the obtained ferronickel alloy grade was high, the nickel and iron were 10.77% and 82.00% , respectively, which satisfies the requirements of nickel alloy raw material in stainless steel, alloy steel and alloy cast iron industrial production.
出处
《中国有色冶金》
CAS
2014年第2期74-78,共5页
China Nonferrous Metallurgy
关键词
转底炉
直接还原
熔炼
镍铁
rotary hearth furnace
direct reduction
smelting
ferronickel
