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中南大学学报(自然科学版)

Journal of Central South University

第48卷    第8期    总第276期    2017年8月

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文章编号:1672-7207(2017)08-1972-07
采用(NH4)2SO4焙烧镍铁渣提取MgO
赵昌明1, 2,蔡永红1, 3,宁哲1, 2,王国承1, 2,亢淑梅1,张崇民1,翟玉春4

(1. 辽宁科技大学 材料冶金学院,辽宁 鞍山,114051; 2. 辽宁省化学冶金工程重点实验室,辽宁 鞍山,114051; 3. 攀钢集团成都钢钒有限公司,四川 攀枝花,617000; 4. 东北大学 材料冶金学院,辽宁 沈阳,110004)

摘 要: 针对镍铁渣传统处理工艺污染严重、资源浪费等不足,提出(NH4)2SO4焙烧镍铁渣循环工艺。通过单因素实验考察焙烧温度、(NH4)2SO4与镍铁渣质量比(即铵矿比)、焙烧时间对镍铁渣中MgO浸出率的影响,并在此基础上使用正交设计优化工艺条件。研究结果表明:优化实验条件为焙烧温度450 ℃,铵矿比3.5:1.0,焙烧时间120 min;在上述优化实验条件下进行多次重复实验,MgO浸出率稳定在90%以上;本工艺是绿色环保工艺,具有生产成本低、低污染等优点。

 

关键字: 镍铁渣;硫酸铵;焙烧;红土镍矿

Recovery of MgO from laterite nickel slag through roasting by ammonium sulfate
ZHAO Changming1, 2, CAI Yonghong1, 3, NING Zhe1, 2, WANG Guocheng1, 2, KANG Shuming1, ZHANG Chongmin1, ZHAI Yuchun4

1. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China; 2. Key Laboratory of Chemical Metallurgy Engineering of Liaoning Province, Anshan 114051, China; 3. Pangang Group Chengdu Iron & Steel Co., Ltd., Panzhihua 617000, China; 4. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

Abstract:The circulation process of sulfation roasting laterite nickel slag using ammonium sulfate was designed to overcome the defects of traditional process, such as severe environmental pollution and resource waste. Through single factor experiment, the effects of roasting temperature, mass ratio of ammonium sulfate to ore, and roasting time on the extracting rate of MgO from the laterite nickel slag were investigated. Furthermore, the optimum technological conditions were determined by orthogonal experiment. The results show that the optimum technological conditions are as follows: roasting temperature of 450 ℃, mass ratio of ammonium sulfate to ore of 3.5:1.0 and roasting time of 120 min. The extracting rate of MgO is stably over 90% under the optimum conditions. The process is proved to be significant in exploitation and utilization of laterite nickel slag, which has some advantages, such as environmental friendly, low production cost and low pollution.

 

Key words: laterite nickel slag; ammonium sulfate; roasting; nickel laterite ore

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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