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Production method of granular anhydrous strontium chloride

A production method, strontium chloride technology, applied in the direction of calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve problems such as unstable product quality, heavy dust on the production site, and high labor intensity of workers. Achieve the effect of avoiding technical difficulties in equipment material selection, low equipment corrosion, and easy moisture index

Active Publication Date: 2014-07-30
CHONGQING YUANHE FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is long, the output is small, and the energy consumption is high; the labor intensity of the workers is high, and the production site is dusty and the environment is poor; the equipment is severely corroded and the product quality is unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a, strontium carbonate and hydrochloric acid are reacted to obtain a concentration of strontium chloride solution that is 32 degrees Baume;

[0017] b. Remove impurities from the strontium chloride solution to remove foreign matter such as magnesium ions, iron ions, calcium ions, sulfate ions, silt, etc.; filter to obtain strontium chloride clear liquid, and then perform precision filtration to obtain chlorine strontium chloride clear liquid;

[0018] c. Pump the strontium chloride clear liquid into the absorption tower circulation pool, and pass the drying hot air from the fluidized bed into the clear liquid to absorb and dry the anhydrous strontium chloride dust produced by the fluidized bed. It is also reduced from 140 degrees to 80 degrees, so that the tail wind meets the discharge requirements; at the same time, the water in the solution is evaporated, and the strontium chloride solution with a concentration of 32 degrees Baume is concentrated to 42 degrees Baume. ...

Embodiment 2

[0022] a, strontium carbonate and hydrochloric acid are reacted to obtain a concentration of strontium chloride solution that is 35 degrees Baume;

[0023] b. Remove impurities from the strontium chloride solution to remove foreign matter such as magnesium ions, iron ions, calcium ions, sulfate ions, silt, etc.; filter to obtain strontium chloride clear liquid, and then perform precision filtration to obtain chlorine strontium chloride clear liquid;

[0024] c. Pump the strontium chloride clear liquid into the absorption tower circulation pool, pass the drying hot air from the fluidized bed into the clear liquid to absorb and dry the anhydrous strontium chloride dust produced by the fluidized bed, and dry the tail air at the same time The temperature is also reduced from 135 degrees to 70 degrees, so that the tail wind meets the emission requirements; at the same time, the water in the solution is evaporated, and the strontium chloride solution with a concentration of 35 degre...

Embodiment 3

[0028] a, strontium carbonate and hydrochloric acid are reacted to obtain a concentration of strontium chloride solution that is 32 degrees Baume;

[0029] b. Remove impurities from the strontium chloride solution to remove foreign matter such as magnesium ions, iron ions, calcium ions, sulfate ions, and sediment; filter to obtain strontium chloride clear liquid, and then perform precision filtration to obtain a finer filter pore size 1 micron, get strontium chloride serum;

[0030] c. Pump the strontium chloride clear liquid into the absorption tower circulation pool, pass the drying hot air from the fluidized bed into the clear liquid to absorb and dry the anhydrous strontium chloride dust produced by the fluidized bed, and dry the tail air at the same time The temperature is also reduced from 140 degrees to 80 degrees, so that the tail wind meets the emission requirements; at the same time, the water in the solution is evaporated, and the strontium chloride solution with a ...

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Abstract

The invention relates a production method of granular anhydrous strontium chloride. The method has the advantages of energy saving, environmental friendliness, simple process, convenience in operation and stable quality. The production method comprises the following steps: a. reacting strontium carbonate with hydrochloric acid to form strontium chloride solution; b. carrying out impurity removal and filtration treatment on the strontium chloride solution; c. evaporating and concentrating treated clear strontium chloride solution with drying hot tail air to increase concentration of the solution to 40-44 Baume degrees, and simultaneously absorbing anhydrous strontium chloride dust out of the hot tail air; and d. pumping the concentrated solution to a fluidized bed, spraying and granulating as well as simultaneously drying by the drying hot air of the fluidized bed, wherein the average particle size of the granulation product is controlled to be between 2 mm and 5 mm and the drying hot air at the equipment outlet can be used in the step c. Through verification, the energy consumption of the production method is 60% that of the existing technical scheme, the product has water content of 0.1-0.3% and the product can be stored for at least 6 months, and the corrosion to equipment is reduced.

Description

technical field [0001] The present invention relates to the production method of anhydrous strontium chloride. Background technique [0002] Since liquid crystal glass substrates have extremely high requirements on the mixing uniformity of raw materials, all formula raw materials are required to have excellent looseness, so as to facilitate the mixing of raw materials and reduce the reject rate of its products. [0003] At present, the production process of anhydrous strontium chloride is mainly: using strontium carbonate as raw material, first producing strontium chloride hexahydrate, and then drying to obtain anhydrous strontium chloride. The process is long, the output is small, and the energy consumption is high; the labor intensity of the workers is high, and the production site is dusty and the environment is poor; the equipment is severely corroded and the product quality is unstable. Contents of the invention [0004] The purpose of the present invention is to pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/30
Inventor 王永范
Owner CHONGQING YUANHE FINE CHEM
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