硫酸钾盐析法加工分离钠镁矾技术研究

doi:10.19286/j.cnki.cci.2023.04.033

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Abstract Astrakanite resources are rich in the northwest of China, and it is of great significance to process and utilize them efficiently and comprehensively. Based on the phase equilibrium characteristics of Na2SO4-MgSO4-K2SO4-H2O quaternary system at 0 ℃, the technology of processing and separating bloedite by potassium sulfate salting-out method was studied. The technology of producing potassium-magnesium compound fertilizer and sodium sulfate was proposed using bloedite and potassium sulfate as the raw materials, and the process calculation was carried out. Sodium sulfate was produced when reaching phase equilibrium in aqueous solution of bloedite at 0 ℃. Then potassium-magnesium compound was precipitated by adding potassium sulfate into the mother solution, which can be used as a compound fertilizer for agriculture. The remaining solution can be recycled back to the original liquid for continuous production. According to process calculations: the primary yield of sodium sulfate and magnesium sulfate can reach 82.79% and 50.19% respectively. A theoretical basis and data support for the comprehensive utilization of bloedite resources was provided.

Key words： potassium sulfate bloedite salting-out method water-salt system phase equilibrium potassium-magnesium compound fertilizer

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	Articles by authors
	Zhang Rongyu
	Gong Xuemin
	Li Na
	Hao Yanan
	Zhang Qian

Cite this article:

Zhang Rongyu,Gong Xuemin,Li Na等. Processing bloedite by potassium sulfate salting out method[J]. CCI, 2023, 46(4): 126-130.

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2023.04.033 OR http://www.mtyhg.com.cn/EN/Y2023/V46/I4/126

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