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Method for producing potassium chloride crystal through solarization on large area of brine pan

A potassium chloride, large-area technology, applied in the direction of alkali metal chloride, energy input, etc., can solve the problems of adding chemical agents, lengthy process, low recovery rate, etc., and achieve high recovery rate, uniform grade, and low cost.

Inactive Publication Date: 2006-12-06
高崧耀 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods require large investment, high cost, many machines, lengthy process, low recovery rate, all need to add chemicals and consume coal, and any link is not well controlled, and low-grade potassium chloride products will emerge in endlessly

Method used

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  • Method for producing potassium chloride crystal through solarization on large area of brine pan

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Experimental program
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Embodiment

[0040] Embodiment (mother liquor is not recovered)

[0041] At 25 DEG C, according to the aforementioned method, take by weighing 1116 kg of potassium-containing chloride-type brine with a Pomi concentration of 29Be, pre-dry to a magnesium chloride content of 26%, and obtain a solution of 836 kg, then mix it with a high-magnesium mother solution with a Pomei concentration of 35Be. The ratio of 1 to 2 is mixed and blended, and the precipitation is clarified to obtain 58kg of carnallite with a potassium chloride content of 23%. Potassium content is 56% crude potassium chloride 14kg, then washes with 34Kg fresh water, spreads and obtains content and is 93% crystalline potassium chloride 5.9kg.

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Abstract

This invention discloses a method for producing crystallized KCl by large-scale salina sun drying. The method comprises: spreading chloride brine containing potassium, decomposing carnallite in a desilting machine, washing crude KCl in the desilting machine, sun drying, dehydrating KCl, washing and drying to obtain the final product with KCl content high than 93%. The method has such advantages as short production period, low cost, high productivity, high recovery rate, and no pollution.

Description

technical field [0001] The invention relates to the technical field of alkali metal halides, in particular to a method for producing potassium chloride in a large area in a salt field. Background technique [0002] Potassium chloride is the main variety of agricultural potassium fertilizer, and it is also the main raw material for industrial production of other potassium salts. At present, 90% of potassium chloride production enterprises in my country are still using the traditional positive and negative "flotation" and hot melting production methods. They all ship the raw material "carnallite" from the salt field to the raw material yard of the workshop, and then use it by bulldozers. The material is pushed into the hopper, and leaves the factory through the links of feeding machine, belt conveyor, decomposition machine, flotation machine, centrifuge, drying and packaging. The above method has large investment, high cost, numerous machines, lengthy process, low recovery rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/08
CPCY02P20/133
Inventor 高崧耀卢学敏赵伟殷树梧魏君英
Owner 高崧耀