Preparation of oxidised pellets using pyrite cinders as raw material
Preparation of oxidised pellets using pyrite cinders as raw material
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DOI：
10.1179/1743281212y.0000000068
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发表时间：
2013-08
影响因子：
2.1
通讯作者：
D. Zhu;T J Chun;J. Pan;Z Q Guo
中科院分区：
文献类型：
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作者：
D. Zhu;T J Chun;J. Pan;Z Q Guo
硫铁矿烧渣是硫酸工业产生的一种固体废物，被认为对环境有害。为了尝试将该原料作为铁单元的来源进行回收利用，考察了硫铁矿烧渣与磁铁精矿不同配比对生球团和焙烧球团矿质量的影响。结果表明，硫铁矿烧渣中硫主要以元素硫的形式存在，预热阶段硫几乎被脱除。硫铁矿烧渣含量越高，焙烧球团的孔隙率越大，导致焙烧球团的抗压强度越低。在硫铁矿烧渣40%，磁铁矿精矿60%，1000℃预热15min，1300℃焙烧15min的条件下，可获得质量合格的工业球团焙烧。
Pyrite cinders are a solid waste generated by the sulphuric acid industry and are considered environmentally hazardous. In order to try and recycle this material as a source of Fe units, the effects of different ratios of pyrite cinders to magnetite concentrate on the qualities of green and roasted pellets were evaluated. The results show that sulphur mainly exists as elementary sulphur in pyrite cinders and was nearly removed at the preheating stage. The higher the pyrite cinder content, the greater the porosity of the roasted pellets, leading to low compressive strength of the roasted pellets. Roasted pellets with acceptable quality for industrial use were obtained under the conditions of 40% pyrite cinders and 60% magnetite concentrate, preheating at 1000°C for 15 min and roasting at 1300°C for 15 min.