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(NH4)2SO4 solution and the basic zinc carbonate, which was then dried and calcinated to yield ZnO:(NH4)2SO4 product was obtained by evaporating crystallization. After the extraction of Pb and Sr, the silica residue was used to extract the SiO2 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 CO2 to generate SiO2·H2O and Na2CO3 solution, which was causticized by using Ca(OH)2 to prepare CaCO3 precipitate and NaOH solution. White carbon black was obtained by drying SiO2·H2O. 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.
作者
王磊
徐智达
申晓毅
Wang Lei;Xu Zhida;Shen Xiaoyi(School of Metallurgy, Northeastern University, Shenyang, Liaoning, China;Liaoning Sensor of Metallurgy and Technology Key Laboratory, Shenyang, Liaoning, China)
出处
《矿产综合利用》
CAS
北大核心
2019年第2期37-41,共5页
Multipurpose Utilization of Mineral Resources
基金
第十一批"大学生创新训练计划"(170042)
国家自然科学基金资助项目(51774070)
中央高校基本科研业务费专项资金资助项目(N150204009)
关键词
氧化锌矿
硫酸浸出
综合提取利用
循环利用
Zinc oxide ore
Sulfate acid leaching
Comprehensive extraction and utilization
Cyclic utilization
