利用NH4Cl焙烧-水浸工艺从低冰镍中提取金属并合成(Ni,Cu,Co)Fe2O4光催化剂
Extraction efficiency of metals from low-nickel matte via NH4Cl roasting-water leaching process and synthesis of(Ni,Cu,Co)Fe2O4 photocatalyst
牟文宁 1顾梦飞 2杜守明 2陈宇翔 2雷雪飞 1陈欢欢 1罗绍华 1王乐3
作者信息
- 1. School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;Key Laboratory of Resources Cleaner Conversion and Efficient Utilization of Qinhuangdao City,Qinhuangdao 066004,China;Key Laboratory of Dielectric and Electrolyte Functional Material of Hebei Province,School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China
- 2. School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China
- 3. College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China
- 折叠
摘要
针对低冰Ni火法冶炼过程能耗高、Co损失大的问题,本文提出了NH4Cl焙烧-水浸联合提取金属,再分离利用金属的工艺.通过正交试验,研究了NH4Cl焙烧过程中不同因素对金属提取的影响,并确定了优化的工艺条件.结果表明,焙烧温度和NH4Cl用量为主要的影响因素,最佳氯化条件为:低冰镍粒径<75 μm,焙烧温度500℃,焙烧时间2.5 h,NH4Cl用量250%,O2流速20 mL/min.通过研究温度和时间对金属浸出的影响,确定了适宜的浸出条件为:温度90℃,时间2 h,这时Ni、Cu、Co和Fe的浸出率分别达到97.6%、96.2%、94.5%和29.2%.以浸出液为原料,以α-Fe2O3为载体与其他金属复合,合成了(Ni,Cu,Co)Fe2O4光催化剂.最佳制备条件确定为:沉淀温度25℃,Ni-Cu-Co与Fe的摩尔比1:3.制备的催化剂为40～60 nm的球形纳米颗粒,在120 min内对亚甲基蓝溶液的降解率可达99.8%.
Abstract
Aiming at high energy consumption and large Co loss in the pyrometallurgy of low-nickel matte,a process of NH4Cl roasting-water leaching was proposed to co-extract metals,followed by the separation and utilization of metals.The effect of several factors on metal extractions in NH4Cl roasting process and the optimized process conditions were investigated by orthogonal experiments.The most influencing factors were roasting temperature and NH4Cl dosage,and the optimized chlorination conditions were as follows:particle size of low-nickel matte<75 μm,roasting temperature of 500℃,roasting time of 2.5 h,NH4Cl dosage of 250%and O2 flow rate of 20 mL/min.By studying the effect of temperature and time on the extraction efficiency of metals,the appropriate leaching conditions were determined as temperature 90℃ and time 2 h.The extraction efficiency of nickel,copper,cobalt and iron can reach 97.6%,96.2%,94.5%and 29.2%,respectively.The(Ni,Cu,Co)Fe2O4 photocatalyst was synthesized from leaching solution using α-Fe2O3 as a carrier to composite with other metals.The optimum conditions were determined as precipitation temperature 25℃ and molar ratio of Ni-Cu-Co to Fe 1:3.The as-prepared catalysts were spherical nanoparticles of approximate 40-60 nm,and the degradation rate of which to methylene blue solution can reach 99.8%within 120 min.
关键词
低冰Ni/氯化焙烧/(Ni,Cu,Co)Fe2O4催化剂/光催化性能Key words
low nickel matte/chlorination roasting/(Ni,Cu,Co)Fe2O4 photocatalyst/photocatalytic performance引用本文复制引用
基金项目
National Natural Science Foundation of China(52074069)
National Natural Science Foundation of China(52174314)
Natural Science Foundation of Hebei Province,China(E2020501022)
Natural Science Foundation of Hebei Province,China(E2021501029)
Natural Science Foundation of Hebei Province,China(E2022501030)
Fundamental Research Funds for the Central Universities,China(N2223027)
Fundamental Research Funds for the Central Universities,China(N2223009)
Science and Technology Project of Hebei Education Department,China(ZD2021331)
Performance Subsidy Fund for Key Laboratory of Dielectric and Electrolyte Functional Material of Hebei Province,China(22567627H)
出版年
2023
NETL
NSTL
万方数据