盐湖水氯镁石复合精制实验研究

doi:10.19964/j.issn.1006-4990.2022-0062

Abstract

Abstract:

Salt lake bischofite is the most important magnesium resource in the salt lake industrial area,and it is the main raw material of magnesium series products.Magnesium chloride is used in the transportation industry for road snowmelt,as magnesium chloride snow melting agent,which has high requirements on the color of the product.In this experiment,the saturated solution of the salt lake bischofite was processed by the composite decolorization of activated carbon and hydrogen peroxide and the chemical impurity removal of ammonium sulfide to obtain a refined magnesium chloride solution that could meet the requirements of the magnesium chloride snow melting agent.When activated carbon and hydrogen peroxide were added at 5% and 50 ℃ for 90 min,the decolorization rate could reach 94.2%.By adjusting the decolorized solution to moderately alkaline and then adding ammonium sulfide,Fe,Cu,Mn and Pb ions were removed in the form of precipitation.The content of Fe,Cu,Mn,Pb impurity ions in the final solution were all less than 0.000 5% under the condition of 0.15% sulfur ion addition and vulcanization at 80 ℃ for 2.0 h.

Key words: bischofite, compound refining, snow-melting agent, magnesium chloride

CLC Number:

TQ132.2

DENG Liangming,JIANG Zhishui,LI Yihuang. Experimental study on compound refining of salt lake bischofite[J]. Inorganic Chemicals Industry, 2022, 54(10): 52-56.

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References 10

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Inorganic Acid-Base-Salt Committee of CIESC

Experimental study on compound refining of salt lake bischofite

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