硫酸盐型钾混盐冷冻制取光卤石矿

Carnallite Produced by Freezing Sulphate-type Potash-bearing Salts

中文关键词:  硫酸盐型钾混盐  冷冻  光卤石

英文关键词:Sulphate-type potash-bearing salts  Freezing  Carnallite 封面图片:罗布泊盐田 罗布泊位于塔里木盆地东部,是一个新生代构造拗陷湖盆,面积10 350km²,海拔780m。罗布泊原为咸水湖,由于气候变迁及人类水利工程影响,现已干涸。湖泊干涸后,其形状宛如人耳,被誉为“地球之耳”。罗布泊干盐湖表层和底层含有丰富的晶间卤水和层间卤水,湖表层晶间卤水矿化度为372.1g/L,水化学类型为硫酸镁亚型。罗布泊已探明钾资源储量超过2.5×10^8t,主要以地下晶间卤水的方式存在。目前,国投罗钾正在对该盐湖进行开发,主要产品为硫酸钾  封面图片为罗布泊盐田。 (图片提供:国投新疆罗布泊钾盐有限责任公司 张 峰  撰 文:国投新疆罗布泊钾盐有限责任公司 杨 锋)

中文摘要:

      针对硫酸盐型钾混盐,通过先兑卤后冷冻可除去硫酸根,再蒸发母液获得光卤石矿。实验研究了体系含水量和冷冻温度对硫酸根冻出率和钾回收率的影响,选取了3个不同冷冻温度下获得的母液进行等温蒸发实验。当冷冻温度为-20 ℃,体系含水量为73.00%时,硫酸根的冻出率为57.66%,总钾回收率为93.96%。

英文摘要:

      :The method of producing carnallite from sulphate-type potash-bearing salts was focused.By brine mixing ,then freezing,epsomite is separated out.After the solid-liquid separation,carnallite is obtained by vaporizing the mother liquor.The experiments analysed the influence of the water content in system and the freezing temperature on the precipitation rate of sulfate ion and the recovery rate of potassium.Three mother liquors were vaporized to produce canallite,which were obtained by freezing in three different temperature.The precipitation rate of sulfate ion was 57.6% and the total recovery rate of potassium was 93.96% in -20 ℃ with 73.00% water content in system.