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Method for removing magnesium and sulfate ion in salt lake brine of hexahydric salt-water system

A technology of sulfate ion and salt lake brine, which is applied in the field of inorganic salt chemical industry, can solve the problems of serious corrosion of equipment, large amount of evaporated water, and high cost, and achieve the effects of reducing labor costs, improving output and quality, and reducing energy consumption

Inactive Publication Date: 2013-01-09
XINJIANG ANHUA MINING INVESTMENT
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Problems solved by technology

This method is conducive to the comprehensive utilization of lithium and magnesium in salt lake brine, the production of lithium carbonate and high value-added products such as magnesia by-product, but the disadvantage is that the equipment is seriously corroded and the amount of evaporated water is large
Compared with the adsorption method, this method has the problem of high cost

Method used

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  • Method for removing magnesium and sulfate ion in salt lake brine of hexahydric salt-water system
  • Method for removing magnesium and sulfate ion in salt lake brine of hexahydric salt-water system

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Embodiment

[0023] (2) Raw material: volume unit is l, weight unit is Kg.

[0024] Original halogen: that is, the natural salt lake contains 0.2-0.35% of potassium ions, 0.36-0.45% of magnesium ions, 14-15% of chloride ions, 1.5-2% of sulfate ions, 0.5-0.8% of nitrate ions, and 9-10% of sodium ions % of brine.

[0025] Quicklime: Available calcium, namely CaO% content > 75.00%.

[0026] Process method:

[0027] Such as figure 1 Shown:

[0028] ⑴ Crushing: Crush the quicklime with a block size of 15-60mm to a block size of 2-10mm, and put it into the crusher for crushing for 1-2 minutes to make it into 120-160 mesh powdered lime.

[0029] ⑵ Lime digestion: Mix the obtained powdered lime with fresh water according to mass: volume = 1kg: 0.6L. A lot of heat is released during the mixing process, and it becomes slaked lime after natural cooling.

[0030] (3) Slurry mixing: Mix the obtained slaked lime and raw halogen according to the ratio of mass:volume=1kg:2.5L, put the mixed slurry in...

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Abstract

The invention relates to a method for removing magnesium and sulfate ion in salt lake brine of a hexahydric salt-water system and belongs to the field of organic salt chemistry. Raw materials used are original halogen and calcium oxide. The raw materials are subjected to crushing, stone digestion, size mixing and magnesium removal by original halogen to obtain brine with magnesium and sulfur removed. The method has the advantages that magnesium removing is achieved by size mixing by original halogen in the original halogen stage, consumption of fresh water in process of preparing lime slurry is reduced greatly compared with the conventional magnesium removal process, and the method is suitable for being used in salt lake areas lack of fresh water. No separator is used, and accordingly one-time investment of fixed asset is reduced, labor cost is also reduced, the method has the advantages that the method is simple in process, high in operability, low in energy consumption and the like, and yield and quality of sodium chloride in salt fields are increased.

Description

technical field [0001] The method for removing magnesium and sulfate ions by utilizing salt lake brine of a six-component water salt system belongs to the field of inorganic salt chemical industry. Background technique [0002] my country's salt lakes are rich in brine resources, mainly chlorinated, sulfuric acid, and nitric acid salt lakes. At present, magnesium removal is the main process route for extracting potassium and lithium from salt lake brine. The main domestic methods for magnesium removal are as follows, each with its own advantages and disadvantages: [0003] ①Calcination method: Saturated brine containing lithium and magnesium chloride is used as raw material, and the technological process of spray drying, calcination, washing with water, evaporation concentration and precipitation is adopted to separate magnesium and lithium from salt lake brine with high magnesium-lithium ratio, and obtain high-quality lithium carbonate, High-purity magnesium oxide and by-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/16
Inventor 马建玲魏廷祥谢祥林丁朝波贺其华杨顺隆肖建伟董锐马朝伟
Owner XINJIANG ANHUA MINING INVESTMENT
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