中低品位氧化锌矿综合利用试验研究
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摘要
采用硫酸法处理中低品位氧化锌矿,将氧化锌矿和水按一定配比加入硫酸中浸出,反应结束后过滤分离得到滤液和滤渣。滤液净化除杂后,以碳酸铵为沉淀剂制备碱式碳酸锌和硫酸铵,碱式碳酸锌干燥煅烧得到氧化锌,硫酸铵溶液蒸浓结晶得到硫酸铵产品。提锌渣提取铅、锶后碱熔融焙烧提硅,焙烧物料水溶分离得到硅酸钠溶液和尾渣,尾渣回收铁。碳分硅酸钠溶液得到沉淀二氧化硅,干燥即得白炭黑,苛化碳酸钠溶液制备沉淀碳酸钙和氢氧化钠溶液,氢氧化钠溶液蒸浓结晶返回提硅工序。整个工艺流程中低品位氧化锌矿的有价成分锌、铁、铅、锶、硅均得到提取利用,并得到碳酸钙产品,实现了中低品位氧化锌矿的综合利用。
Zinc oxide ore was leached by sulfate acid for comprehensive utilization. Zinc oxide ore and water at a certain proportion were added into the sulfate acid solution and leached for a certain time. The filtrate and residue were obtained after filtration. The purified solution was used to prepare(NH_4)_2SO_4 solution and the basic zinc carbonate, which was then dried and calcinated to yield ZnO:(NH_4)_2SO_4 product was obtained by evaporating crystallization. After the extraction of Pb and Sr, the silica residue was used to extract the SiO_2 by NaOH melton baking. The roasting material was water leached and filtrated, then Na2 Si O3 solution and slag for iron recovery were gotten. The Na2 Si O3 solution was carbonated by CO_2 to generate SiO_2·H_2O and Na_2CO_3 solution, which was causticized by using Ca(OH)2 to prepare CaCO3 precipitate and NaOH solution. White carbon black was obtained by drying SiO_2·H_2O. NaOH was returned to roaste silica residue through evaporating crystallization. The whole process realize the comprehensive extraction and utilization of valuable elements in low grade zinc oxide ore, such as Zn, Fe, Pb, Sr and Si, and produce CaCO3, and realize the comprehensive utilization of low grade zinc oxide ore.
Zinc oxide ore was leached by sulfate acid for comprehensive utilization. Zinc oxide ore and water at a certain proportion were added into the sulfate acid solution and leached for a certain time. The filtrate and residue were obtained after filtration. The purified solution was used to prepare(NH_4)_2SO_4 solution and the basic zinc carbonate, which was then dried and calcinated to yield ZnO:(NH_4)_2SO_4 product was obtained by evaporating crystallization. After the extraction of Pb and Sr, the silica residue was used to extract the SiO_2 by NaOH melton baking. The roasting material was water leached and filtrated, then Na2 Si O3 solution and slag for iron recovery were gotten. The Na2 Si O3 solution was carbonated by CO_2 to generate SiO_2·H_2O and Na_2CO_3 solution, which was causticized by using Ca(OH)2 to prepare CaCO3 precipitate and NaOH solution. White carbon black was obtained by drying SiO_2·H_2O. NaOH was returned to roaste silica residue through evaporating crystallization. The whole process realize the comprehensive extraction and utilization of valuable elements in low grade zinc oxide ore, such as Zn, Fe, Pb, Sr and Si, and produce CaCO3, and realize the comprehensive utilization of low grade zinc oxide ore.
引文
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[2].申晓毅,孙毅,宋继强,等.硫酸铵低温焙烧中低品位氧化锌矿[J].材料研究学报,2012,26(4):396-401.
[3].陈兵,申晓毅,顾惠敏,等.碱焙烧法综合利用低品位氧化锌矿[J].矿产综合利用,2016(5):30-33.
[4].Shao Hongmei,Shen Xiaoyi,Sun Yi,et al.Reaction condition optimization and kinetic investigation of roasting zinc oxide ore using(NH4)2SO4[J].International Journal of Minerals,Metallurgy and Materials,2016,23(10):1133-1140.
[5].Sun Yi,Shen Xiaoyi,Zhai Yuchun.Thermodynamics and kinetics of extracting zinc from zinc oxide ore by ammonium sulfate roasting method[J].International Journal of Minerals,Metallurgy and Materials,2015,22(5):467-475.
[6].丰奇成,文书明,柏少军,等.低品位难处理氧化锌矿综合利用现状[J].矿产综合利用,2013(1):4-8.
[7].王洪岭.氧化锌矿浮选工艺及捕收剂研究现状[J].铜业工程.2011,(4):12-16.
[8].Chen Ailiang,Zhao Zhongwei,Jia Xijun,et al.Alkaline leaching Zn and its concomitant metals from refractory hemimorphite zinc oxide ore[J].Hydrometallurgy,2009,97(3-4):228-232.
[9].赵中伟,贾希俊,陈爱良.氧化锌矿的碱浸出[J].中南大学学报,2010,41(1):39-43.
[10].Yin Z L,Ding Z Y,Hu H P,et al.Dissolution of zinc silicate(hemimorphite)with ammonia-ammonium chloride solution[J],Hydrometallurgy,2010,104(1-4):215-220.
[11].唐谟堂,张家靓,王博,等.低品位氧化锌矿在MACA体系中的循环浸出[J].中国有色金属学报,2011,21(1):214-219.
[12].Yang S H,Li H,Sun Y W,et al.Leaching kinetics of zinc silicate in ammonium chloride solution[J].Transactions of Nonferrous Metals Society of China,2016,26(6):1688-1695.
[13].翟玉春.绿色冶金-资源绿色化、高附加值综合利用[M].长沙:中南大学出版社,2015.
[14].孙毅.氧化锌矿高附加值绿色化综合利用的研究[D].沈阳:东北大学,2014.