Method for producing strontium carbonate from carbon dioxide in exhaust gas

A technology of carbon dioxide and strontium carbonate, applied in the direction of strontium carbonate, calcium carbonate/strontium/barium, etc., can solve the problems of difficult operation, high operation cost, and easy waste generation, and achieve the effects of easy control, simple operation, and reduced product cost

Inactive Publication Date: 2016-10-26
SHIJIAZHUANG ZHENGDING JINSHI CHEM
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Problems solved by technology

[0009] This kind of operation cost is high, it is not easy to operate, and it is easy to generate waste

Method used

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Embodiment Construction

[0024] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in specific implementation manners.

[0025] A kind of method that utilizes the carbon dioxide in the exhaust gas to produce strontium carbonate described in the present embodiment, comprises the following steps:

[0026] S1. Preparation of crude strontium

[0027] Put celestite and coal powder into the rotary furnace at a mass ratio of 2:1, and roast at 800-900 degrees, the SrSO in celestite 4 is reduced to soluble SrS;

[0028] S2, leaching of crude strontium

[0029] After the crude strontium is transferred out of the rotary furnace, it is directly transported to the leaching tank. During operation, the leaching tank is a closed system, and the high-temperature crude strontium is added to the leaching tank filled with water, and high temperature is generated in the leaching tank. High pressure, crude strontium reacts with w...

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Abstract

The invention provides a method for producing strontium carbonate by utilizing carbon dioxide in waste gas, comprising the following steps: S1, preparation of crude strontium; S2, leaching of crude strontium; S3, purification of CO in waste gas 2 ; S4, carbonization of leaching solution; S5, desulfurization of strontium carbonate slurry. The beneficial effect of the present invention is that the tail gas produced in the calcination process is used to purify CO2, and then used in the production of strontium carbonate. control features. Low cost and strong market competitiveness. The entire production process is closed-loop, with high yield, reducing my carbon dioxide emissions and turning waste into treasure.

Description

technical field [0001] The invention relates to the technical field of strontium carbonate preparation, in particular to a method for producing strontium carbonate by utilizing carbon dioxide in waste gas. Background technique [0002] The celestite ore and coal are mixed according to the strontium content in the ore and the carbon content in the coal with the appropriate proportion of ore and coal, and the ingredients are reduced and roasted under high temperature conditions, and the SrSO4 in the ore is reduced to soluble SrS. The clinker was leached with water, and SrS was dissolved in water. After repeated leaching to remove impurities, the filtrate was used to precipitate SrS into SrCO3 with CO2. The response is as follows: [0003] Sr(OH)2+CO2→SrCO3↓+H2O [0004] Sr(HS)2+CO2+H2O→SrCO3↓+H2S↑ [0005] SrS+CO2+H2O→SrCO3↓+H2S↑ [0006] In the past production, the production of CO2 is an indispensable basic link for manufacturers in the strontium carbonate industry. Most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
CPCC01F11/187
Inventor 仝毅石
Owner SHIJIAZHUANG ZHENGDING JINSHI CHEM
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