Process for producing industrial magnesium oxide using dolomite ash and boron mud

A magnesium oxide and dolomite technology, applied in the direction of magnesium oxide, etc., can solve the problems of chemical raw materials such as bittern, achieve the effects of reducing energy consumption, easy design and manufacture, and reducing production and operation costs

Inactive Publication Date: 2007-04-11
高佳令
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0020] Though this method has also utilized Ca(OH) in the dolomite emulsion 2 ingredients, but requires more expensive chemical raw material bittern, and increases the soluble impurity CaCl 2

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The present invention is described in detail as follows with the following examples:

[0051] 1. Weigh 150Kg of boron mud and add it to a 5 cubic meter reaction tank, add 55Kg of dolomite, (first make dolomite into gray milk), add 150g of halogen flakes (MgCl 2 ·6H 2 0), then 0.3 cubic meters of pyrolysis water (85-95°C) produced by the pyrolysis process, keep the temperature at 85°C, react for 2 hours, after the reaction is complete, add 4 cubic meters of cold water after cooling, make the temperature below 25°C, pass Into 0.3MPa, CO 2 Kiln gas with a content of 38%, react for 1 hour, and control the temperature below 35°C. After the reaction is completed, filter, and heat the filtrate to 101°C with 1.3MPa high-pressure steam to produce white light magnesium carbonate precipitate. After filtering, washing, drying and crushing at 140°C, 90Kg of light magnesium carbonate is obtained, and then calcined at 800°C to obtain industrial oxidation Magnesium 32Kg, the product...

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PUM

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Abstract

The present invention belongs to the field of inorganic chemical technology, and is especially process of producing industrial magnesia with dolomite and boric slime as industrial waste. The present invention produces industrial magnesia through slaking dolomite, reaction with boric slime, carbonating, thermal decomposing, drying, calcining and other steps. The present invention features the phase transfer catalysis reaction of the slaked dolomite and boric slime to convert magnesium carbonate hard to carbonize into magnesium hydroxide easy to carbonize.

Description

technical field [0001] The invention relates to a production method of industrial magnesium oxide, in particular to a method for comprehensively utilizing dolomite and boron mud to produce industrial magnesium oxide. Background technique [0002] The existing production methods of light magnesium carbonate and industrial magnesium oxide mainly include carbonization of dolomite and magnesite, reactive carbonization of bittern dolomite, and precipitation of picrine. [0003] The existing methods for producing industrial magnesia by utilizing dolomite (calcined product of dolomite) are as follows: firstly, dolomite is digested and directly carbonized, then pyrolyzed and dried to obtain light magnesium carbonate, and then calcined to obtain industrial magnesia products. [0004] The production chemical reaction equation is as follows: [0005] Calcination of dolomite: [0006] <chemistry num="001"> <chem file="200610137676_cml001.xml" / > < / chemistry> [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/06
Inventor 高佳令王建涛高霖
Owner 高佳令
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