Method for producing calcium chlorate and co-producing fine calcium carbonate and sodium chloride by using carbide slag

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

Inactive Publication Date: 2011-06-22
汪晋强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 du...

Method used

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  • Method for producing calcium chlorate and co-producing fine calcium carbonate and sodium chloride by using carbide slag
  • Method for producing calcium chlorate and co-producing fine calcium carbonate and sodium chloride by using carbide slag

Examples

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Embodiment 1

[0029] A method for producing calcium chlorate and co-producing fine calcium carbonate and sodium chloride with carbide slag, comprising the steps of:

[0030] A: Put chlor-alkali calcium carbide slag containing 100kg of calcium hydroxide 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;

[0031] B: send the calcium carbide slag gained in step A to the chlorination tower (2) with the first pressure pump, at the same time, input chlorine gas in the chlorination tower (2), so that the mass ratio of calcium hydroxide and chlorine gas is 1: 1.16 Chlorination reaction, control the chlorination reaction temperature, keep the reaction solution not boiling, the chlorination reaction generates the reaction product containing calcium chlorate and calcium chloride; show the reaction end point with the chlorination table (3), when the chlorination table (3) When the hands of the meter are fixed, it indicates ...

Embodiment 2

[0039] A method for producing calcium chlorate and co-producing fine calcium carbonate and sodium chloride with carbide slag, comprising the steps of:

[0040] A: Put chlor-alkali calcium carbide slag containing 100kg of calcium hydroxide 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;

[0041] B: pump to the chlorination tower (2) with the first pressure, at the same time, input chlorine gas in the chlorination tower (2), make calcium hydroxide and chlorine gas pure substance mass ratio be 1: 0.76 to carry out chlorination reaction, control chlorine Increase the reaction temperature to keep the reaction solution from boiling, and the chlorination reaction generates the reaction product containing calcium chlorate and calcium chloride; show the reaction end point with the chlorination meter (3), when the pointer of the chlorination meter (3) is fixed , indicating that the solution no longer abso...

Embodiment 3

[0049] A method for producing calcium chlorate and co-producing fine calcium carbonate and sodium chloride with carbide slag, comprising the steps of:

[0050] A: Put chlor-alkali calcium carbide slag containing 100kg of calcium hydroxide 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;

[0051] B: pump to the chlorination tower (2) with the first pressure, at the same time, input chlorine gas in the chlorination tower (2), make calcium hydroxide and chlorine gas pure substance mass ratio be 1: 1.00 to carry out chlorination reaction, control chlorine Increase the reaction temperature, keep the reaction solution from boiling, and the chlorination reaction generates the reaction product containing calcium chlorate and calcium chloride; show the reaction end point with the chlorination meter (3), when the pointer of the chlorination meter (3) is fixed , indicating that the solution no longer absorbs ...

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PUM

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Abstract

The invention discloses a method for producing calcium chlorate and co-producing fine calcium carbonate and sodium chloride by using carbide slag, comprising the following steps of: generating a reaction product containing the calcium chlorate and calcium chloride by reacting calcium hydroxide contained in chlor-alkali carbide slag with chlorine; filtering and decontaminating the reaction product, reducing temperature, subsiding, and then separating out a calcium chlorate solid; then filtering to obtain the calcium chlorate solid and calcium chloride filter liquor; treating the calcium chloride filter liquor by using a surface active agent, and then reacting with sodium carbonate in a corrosion-resisting reactor to obtain a calcium carbonate sediment and sodium chloride mixed solution; and filtering and separating the calcium carbonate and the sodium 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 calcium chlorate and co-producing fine calcium carbonate and sodium 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 increa...

Claims

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Application Information

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IPC IPC(8): C01B11/14C01F11/18C01D3/04
Inventor 王嘉兴
Owner 汪晋强
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