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The effect of iron content on the reduction of nickel laterite by direct reduction method

机译:铁含量对直接减少方法减少镍近镍的影响

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Reduction and the compounds formed when the reduced laterite nickel has been investigated. Nickel laterite with average grain size below 0.149 mm mixed with 13% (weight percent) of coal as reductant then reduced in muffle furnace with temperature from 700 °C to 1000 °C. Type of laterite is used which has high iron (saprolite) and low iron content (limonite). Reaction time varied 30, 60 and 90 minutes. The reduction of nickel during reduction is determined by an analysis of metallization values. Metallization analysis used bromine methanol method, while the compound analysis was formed using x-ray Diffractometer. Based on the metallization test, it is known that the laterite nickel ore containing high iron will produce a higher nickel reduction than the laterite nickel ore containing low iron. This corresponds to the oxide phases formed. The higher iron contain on the ore tend to produce the fayalite mixture and slightly forsterite, while at low iron content will form a forsterite. Forsterite tends to inhibit reduction of nickel.
机译:还原时形成的化合物和在还原后的镍时形成的化合物。镍横向,平均粒径低于0.149毫米,与13%(重量百分比)的煤混合,作为还原剂,然后将Muffle炉中减少,温度为700℃至1000℃。使用的型式使用高铁(皂石)和低铁含量(褐铁矿)。反应时间改变30,60和90分钟。减少期间的镍的还原是通过对金属化值的分析来确定的。金属化分析使用溴甲醇方法,同时使用X射线衍射仪形成化合物分析。基于金属化试验,已知含有高铁的红镍矿石将产生比含有低铁的红镍矿石更高的镍。这对应于形成的氧化术。矿石上含有较高的铁倾向于产生配盐酸盐混合物和略微叉段,而在低铁含量将形成叉段。 Forsterite倾向于抑制镍的还原。

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