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Method for co-production of light calcium carbonate and ammonium chloride in preparation of potassium chlorate by carbide slag

A light calcium carbonate and potassium chlorate technology, applied in the direction of calcium carbonate/strontium/barium, chloric acid, chlorate, etc., can solve the problems of land erosion, large land, easy leakage and polluted road surface, etc., and achieve low equipment investment, The effect of simple operation steps

Inactive Publication Date: 2010-09-08
汪晋强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbide slag has a moisture content of 40% to 50% and is in the form of paste. It is easy to leak and pollute the road surface during transportation. Long-term accumulation not only occupies a large amount of land, but also has a serious erosion effect on the land.

Method used

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  • Method for co-production of light calcium carbonate and ammonium chloride in preparation of potassium chlorate by carbide slag
  • Method for co-production of light calcium carbonate and ammonium chloride in preparation of potassium chlorate by carbide slag

Examples

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Embodiment 1

[0028] A method for producing potassium chlorate with calcium carbide slag to co-produce light calcium carbonate and ammonium chloride, comprising the steps:

[0029] A: Put the chlor-alkali carbide slag into the ash tank (1), mix it with water to form an emulsion, and make the content of calcium hydroxide reach 120 grams per liter;

[0030] B: Send the calcium carbide slag containing 200kg calcium hydroxide to the chlorination tower (2) with the first pressure pump, and at the same time, input chlorine gas in the chlorination tower (2), so that the mass ratio of calcium hydroxide to chlorine gas is 1 : 0.76 to carry out chlorination reaction, control the chlorination reaction temperature, keep the reaction solution not boiling, display the reaction end point with the chlorination meter (3), when the pointer of the chlorination meter (3) is fixed, it shows that the solution no longer absorbs chlorine , to achieve deep chlorination, that is, chlorination is completed, and a rea...

Embodiment 2

[0040] A method for producing potassium chlorate with calcium carbide slag to co-produce light calcium carbonate and ammonium chloride, comprising the steps:

[0041] A: Put the chlor-alkali carbide slag into the ash tank (1), mix it with water to form an emulsion, and make the content of calcium hydroxide reach 120 grams per liter;

[0042] B: Send the calcium carbide slag containing 300kg calcium hydroxide to the chlorination tower (2) with the first pressure pump, and at the same time, input chlorine gas in the chlorination tower (2), so that the mass ratio of calcium hydroxide to chlorine gas is 1 : 1.00 carry out chlorination reaction, control the chlorination reaction temperature, keep the reaction solution not boiling, show the reaction end point with the chlorination meter (3), when the pointer of the chlorination meter (3) is fixed, it shows that the solution no longer absorbs chlorine , to achieve deep chlorination, that is, chlorination is completed, and a reaction ...

Embodiment 3

[0052] A method for producing potassium chlorate with calcium carbide slag to co-produce light calcium carbonate and ammonium chloride, comprising the steps:

[0053] A: Put the chlor-alkali carbide slag into the ash tank (1), mix it with water to form an emulsion, and make the content of calcium hydroxide reach 120 grams per liter;

[0054] B: send the calcium carbide slag containing 200kg calcium hydroxide to the chlorination tower (2) with the first pressure pump, at the same time, input chlorine gas in the chlorination tower (2), make calcium hydroxide and chlorine gas pure substance mass ratio be 1:1.16 for chlorination reaction, control the chlorination reaction temperature, keep the reaction solution from boiling, use the chlorination meter (3) to display the reaction end point, when the needle of the chlorination meter (3) is fixed, it indicates that the solution is no longer absorbed Chlorine gas reaches deep chlorination, that is, chlorination is completed, and a rea...

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Abstract

The invention discloses a method for co-production of light calcium carbonate and ammonium chloride in the preparation of potassium chlorate by carbide slag. In the method, calcium hydroxide in chlor-alkali carbide slag reacts with chlorine gas to produce reaction products with calcium chlorate and calcium chloride; the reaction products are filtered to remove impurities, solid calcium chlorate can be separated out through settlement under the reduced temperature, and then solid calcium chlorate and calcium chloride filtrate can be obtained through filtration again; the reaction products with the calcium chlorate and the calcium chloride can also react with potassium chloride for double decomposition to produce mixed solution of potassium chlorate and calcium chloride; the mixed solution is filtered to remove impurities, potassium chlorate crystals can be separated out through distillation under the reduced pressure, and potassium chlorate crystals and calcium chloride solution can be obtained through filtration again; and then the calcium chloride solution after being treated with a surfactant react with carbon dioxide and ammonia in a carbonation tower for carbonation, thereby obtaining the light calcium carbonate and ammonium chloride.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of chlor-alkali carbide slag, in particular to a method for producing potassium chlorate and co-producing light calcium carbonate and ammonium chloride with calcium carbide slag. Background technique [0002] Carbide slag is the waste residue produced when calcium carbide is used to produce acetylene, and its main component is Ca(OH) 2 , also contains a small amount of Fe 2 o 3 , SiO 2 and Al 2 o 3 Other metal oxides, hydroxides and a small amount of organic matter. Carbide slag is an important way to use a large amount of carbide slag as a raw material for cement production. It not only solves the problem of carbide slag discharge polluting the environment, realizes the comprehensive recycling of resources, but also saves limestone resources and reduces carbon dioxide emissions. However, with the development of industrialization in our country, the annual output of carbide slag is i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/14C01F11/18C01C1/16B09B3/00
CPCY02W30/82
Inventor 王嘉兴
Owner 汪晋强
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