明矾石焙砂提取硫酸钾的工艺研究  

STUDY ON THE TECHNOLOGY OF ABSTRACTING POTASSIUM SULFATE FROM ALUNITE CALCINE

作　　者：李达[1] 蒋开喜[1] 蒋训雄[1] 汪胜东[1] 范艳青[1] 肖晓阳 

机构地区：[1]北京矿冶研究总院,北京102628 [2]广西冶金研究院有限公司,南宁530023

出　　处：《矿冶》2016年第5期42-45,共4页Mining And Metallurgy

摘　　要：以明矾石脱水脱硫后得到的焙砂为原料,通过水浸实现钾、铝选择性浸出分离。在浸出温度25℃、时间15 min、液固比2∶1的条件下,氧化钾的浸出率达到86%以上。水浸前后样品的XRD、SEM图谱分析表明,渣中未浸出的氧化钾以类伊利石形式存在于水浸渣中,氧化铝几乎全部进入渣相。水浸液经过蒸发结晶得到硫酸钾产品,产品符合农用硫酸钾标准。In this study, alunite calcine was used as the raw materials to accomplish the selective leaching of potassium through water leaching, The leaching rate of potassium oxide reached 86% in hydro-leaching process, when the temperature was 20 ℃ , reaction time 60 rain, and liquid-to-solid ratio 2： 1. The XRD and SEM results showed that the unleached potassium oxide entered into leaching residue as a form similar to illite and almost all a- lumina entered into leaching residue. A potassium sulfate product could be obtained from leach liquor through evap- orating crystallization which met the standard of agricultural potassium sulfate.

关 键 词：明矾石 水浸 蒸发结晶 硫酸钾 

分 类 号：TD871.2[矿业工程—非金属矿开采] TF111.3[矿业工程—矿山开采]