摘要
以锑精炼产生的含砷9%、含锑2%、含碱40%左右的二次砷碱渣为原料,在液固比为3∶1、90℃以上搅拌浸出3 h,过滤后得到砷锑渣和浸出液。在浸出后液中加入脱锑剂A,在60℃条件下搅拌反应3 h,过滤后得到锑酸钠。在脱锑后液中通入二氧化碳,在45℃左右搅拌反应3 h,pH值达到中性后,过滤得到碳酸氢钠;在95℃以上条件下返溶碳酸氢钠,产出碳酸钠。在脱碱后液中加入试剂B,在55℃左右搅拌反应3 h,过滤后得到无水砷酸钠;脱砷后液返回浸出工序。产品锑酸钠中锑含量在40%左右,碳酸钠中砷含量小于1.5%,砷酸钠中砷含量在24%以上。二次砷碱渣清洁化生产技术实现了浸出后液中的砷、锑、碱的全分离,对于环境保护及资源的综合利用具有重要的现实意义。
By stirring the second arsenic-alkali residue for 3 h which contained 9% arsenic, 2% antimony and 40% soda produced in the process of antimony abstracting when the fluid solid ratio was 3 and the temperature was above 90℃, the leached liquid and arsenic-antimony slag was obtained after filtering. Through adding the antimony-removing reagent A into the liquid and stirring it at 60℃ for 3 h sodium antimonate was got after filtering. After removing the antimony, carbon dioxide was blown into the liquid, which was stirred for 3 h at 45℃or so until the pH value was neuter, and then sodium bicarbonate was produced after filtering. Sodium carbonate was got after re-dissolving the sodium bicarbon- ate above 95℃. The reagent B was added into the soda-free liquid. Anhydrous sodium arseniate was got after stirring the liquid for 3 h at 55℃. The liquid was returned to the leaching process after arsenic was removed. The content of antimony in the sodium antimonate product reached to 40%. The content of arsenic in the sodium carbonate product was under 1.5%. The content of arsenic in the anhydrous sodium arseniate product reached to 24%. The cleanly production technology of second arsenic-alkali residue achieved the absolute separation of arsenic, soda and antimony in the lixivium. It had vital practical significance for the environmental protection and the resource's comprehensive utilization.
出处
《矿冶工程》
CAS
CSCD
北大核心
2007年第2期47-49,共3页
Mining and Metallurgical Engineering
关键词
砷碱渣
清洁化生产
环境保护
脱锑
砷酸钠
arsenic-alkali residue
cleanly production
environmental protection
antimony-removing
sodium arseniate