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A method for preparing calcium silicate hydrate and magnetic hydrotalcite from industrial waste

A technology of magnetic hydrotalcite and hydrated calcium silicate, which is applied in chemical instruments and methods, hydrotalcite, solid waste removal, etc., can solve the problems of low added value, high cost, and low cost, and achieve high energy consumption Effect

Inactive Publication Date: 2018-05-01
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problem 1 Applying a large amount of finished raw materials to process industrial waste
Question 2 Use waste as raw material to prepare low-cost, low-value-added or high-cost, high-value-added products
Simple extraction of effective components in waste, lack of effective treatment and utilization of the remaining part after extraction

Method used

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  • A method for preparing calcium silicate hydrate and magnetic hydrotalcite from industrial waste
  • A method for preparing calcium silicate hydrate and magnetic hydrotalcite from industrial waste
  • A method for preparing calcium silicate hydrate and magnetic hydrotalcite from industrial waste

Examples

Experimental program
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Effect test

Embodiment 1

[0076] A method for preparing calcium silicate hydrate and magnetic hydrotalcite using industrial waste, the method is divided into five steps: step 1 is burning and activating white mud and high-sulfur coal; step 2 is distillation; step 3 is distillation extraction; step 4 is extraction and separation; Step 5 is synthesis and "three wastes" treatment;

[0077] Step 1: Combustion activation of white mud and high-sulfur coal

[0078] White mud and high-sulfur coal are mixed according to the ratio of calcium atom to aluminum atom in the ratio of 0.8:1-1.5:1, and sent to the fluidized combustion chamber (1-1-1) for combustion, and the soot produced during the combustion process enters the The lime mud gas-solid mixer (1-2-1) is mixed with the lime mud and returned to the fluidized combustion chamber (1-1-1) through the second fan (1-2-10); The ratio of calcium-aluminum substances in high-sulfur coal to white mud is 2:1-3:1.

[0079] The ash generated by combustion enters the se...

Embodiment 2

[0100] This embodiment is basically the same as the method for preparing calcium silicate hydrate and magnetic hydrotalcite by using industrial waste described in Example 1, the difference is that in step 1, white mud and high-sulfur coal are based on the amount of calcium atoms and aluminum atoms The ratio of the amount is 0.8:1-1.5:1 mixing ratio, preferably 1.4:1.

[0101] Calcium atoms and aluminum atoms are 1.4:1, reducing the amount of lime mud added through the mixer, which is conducive to keeping the temperature in the furnace stable.

Embodiment 3

[0103] This example is basically the same as the method described in Example 1 for preparing calcium silicate hydrate and magnetic hydrotalcite from industrial waste, except that in step 1, during the stable combustion process, high-sulfur coal and white mud are maintained. The ratio of the amount of medium-calcium-aluminum substances is 2:1-3:1; preferably 2.2:1.

[0104] The preferred ratio is 2.2:1, which can reduce the energy consumption during lime mud treatment.

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Abstract

A method for preparing calcium silicate hydrate and magnetic hydrotalcite using industrial waste. The invention relates to a treatment method for industrial waste, in particular to the comprehensive utilization of industrial waste such as fly ash, white mud, and waste acid, and the processing of sewage and waste liquid treatment materials. Synthetic method technical field. The invention prepares fly ash, white mud and waste acid into hydrated calcium silicate and magnetic hydrotalcite through burning and activating white mud and high-sulfur coal, distillation, distillation extraction, extraction and separation, synthesis and "three wastes" treatment. The integration of combustion and activation in the invention achieves the technical effect of energy saving and environmental protection; waste gradient extraction realizes the separation and purification of corresponding components while waste is treated. Through the combination of tail gas discharge and mother liquor treatment, the effective treatment of "three wastes" has been realized.

Description

technical field [0001] The invention relates to a treatment method of industrial waste, in particular to the technical field of comprehensive utilization of industrial waste such as fly ash, white mud, waste acid and synthesis method of sewage waste liquid treatment materials. Background technique [0002] Components and hazards of high-sulfur coal, lime mud and waste acid . 1 Composition of high-sulfur coal and its hazards: High-sulfur coal refers to coal with a sulfur content greater than 3%. About 8% of my country's coal resources are high-sulfur coal. The acid mist generated by direct combustion will pollute the atmosphere and cause serious environmental pollution , simple desulfurization treatment will increase production costs, so high-sulfur coal treatment is a bottleneck problem that has plagued the development of related industries in my country for a long time. Desulfurization of high-sulfur coal mainly adopts three methods: desulfurization before use, desulfuriza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/00C01B33/24B09B3/00F23G7/00F23G5/30B01D3/00
CPCB01D3/00F23G5/30F23G7/00C01B33/24C01F7/785B09B3/80
Inventor 杨德智张宏森宋志伟白云启周思栋潘宇刘宁李文文吴迪杜伟
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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