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Process for producing soft potassium magnesium vanadium

The technology of a magnesite and a production method, applied in the field of salt chemical industry, can solve the problems such as low single conversion rate of potassium, cumbersome operation process, etc., and achieve the effects of improving the utilization rate of useful components, improving the yield of potassium, and facilitating absorption

Active Publication Date: 2006-01-25
青海中信国安锂业发展有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The disadvantage of this method is two water treatments, the single conversion rate of potassium is low, which is 27% to 43%, and the operation process is more cumbersome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Embodiment one: the potassium mixed salt that is tanned with sulfate-type brine is broken into finer particles by mechanical means, and is sieved with a standard sieve of about 2 meshes, and the oversize returns to be broken again, and the undersize enters a section of transformation, Add 0.20 times the quality of potassium mixed salt to the first-stage transformation or add 0.3 times the second-stage transformation liquid, react at 35 °C for 1 hour, and keep the mechanical separation of sodium chloride at 35 °C. The bottom material enters the second-stage transformation, and the second-stage transformation adds 0.3 times of fresh water of the mixed salt quality of potassium and transforms at normal temperature for 0.6 hours, and filters to obtain a filter cake. Excess water is the product.

Embodiment 2

[0007] Embodiment 2: still adopt the raw material of embodiment 1 to be broken into fine particles, sieve with a standard sieve of about 10 meshes, the oversize is returned and broken again, and the undersize enters a one-stage transformation, and one-stage transformation adds 0.30 times of fresh water of potassium mixed salt quality. Or 0.45 times of the second-stage conversion liquid, react at 55 ° C for 2.5 hours, the mechanical separation of sodium chloride is kept at 55 ° C and sieved with a standard sieve of about 70 meshes, and the second-stage conversion adds 0.8 times the quality of potassium mixed salt fresh water The conversion was carried out at normal temperature for 1.5 hours, and the material temperature of the drying process of the jarosite was 70°C, and the product was obtained by drying with a flash dryer.

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Abstract

A process for preparing soft KMgV from the mixed K salt generated by sunning the sulfate-type bittern includes such steps as breaking, sieving, stage-one converting, mechanical separation of sodium chloride, stage-two converting, and drying. Its advantages are high output rate and high purity of product.

Description

1. Technical field: [0001] The invention relates to a process technology for producing schite as a raw material with potassium mixed salt prepared by drying with sulfate-type brine, and belongs to the technical field of salt chemical industry. 2. Background technology: [0002] The chemical formula of Magnesite is: MgSO 4 ·K 2 SO 4 ·6H 2 O, is a high-quality fertilizer that can provide necessary nutrients such as potassium, magnesium, and sulfur for crop growth, and becomes potassium-magnesium sulfate fertilizer. Its raw material, potassium mixed salt, is obtained by evaporating and sun-drying sulfate-type brine, and it is a mixture of minerals such as sylvite, carnallite, kaleite, epsomite, and halite. At present, the relatively mature production processes in the world can be divided into four categories: (1) Flotation method: the potassium mixed salt ore made by the magnesium sulfate salt type brine after de-sodiumization and drying is ground to form a slurry, which is...

Claims

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Application Information

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IPC IPC(8): C01F5/40G01D5/00
Inventor 杨建元夏康明吴强
Owner 青海中信国安锂业发展有限公司
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