摘要
针对某氯碱生产过程中产生的盐泥,为从其中回收钙镁,制备纳米氢氧化镁和纳米碳酸钙,对氯碱盐泥进行了盐酸浸出试验研究。结果表明:采用盐酸浸出,浸出时间15 min,温度为60℃,酸度2 mol/L,液固比5∶1,搅拌速率500 r/min,钙镁总浸出率可达到98%以上,所得钙镁富液中,Ca2+、Mg2+、Al3+、Fe3+离子浓度为分别为0.63、0.25、0.05、0.022 mol/L,pH=0.5。
In order to effectively recover calcium and magnesium in the salt slurry generated during chlor-alkali production, which can be used for the preparation of nanometer magnesium hydroxide and nano calcium carbonate, an experimental study was conducted on hydrochloric acid leaching of the chlor-alkali salt slurry. In the experiment, such kind of chlor-alkali salt slurry was leached with hydrochloric acid at a temperature of 60 ℃, with the liquid-solid ratio of 5 ： 1, the acidity of 2.0 mol/L, with a stirring speed of 500 r/min, resulting in the total leaching rate of calcium and magnesium up to more than 98% after 15-rain leaching time, and the concentration of Ca2＋, Mg2＋ , A13＋ and Fe3. in the calcium-magnesium rich solution with pH of 0.5 reaching 0.63, 0.25, 0.05 and 0.022 mol/L, respectively.
出处
《矿冶工程》
CAS
CSCD
北大核心
2014年第3期100-103,共4页
Mining and Metallurgical Engineering
关键词
氯碱盐泥
盐酸
浸出
钙
镁
chlor-alkali salt slurry
hydrochloric acid
leaching
calcium
magnesium
