Method for preparing tobermorite and magnetic hydrotalcite by utilizing industrial wastes

A hydrated calcium silicate, magnetic hydrotalcite technology, applied in chemical instruments and methods, hydrotalcite, solid waste removal and other directions, can solve the problems of low added value, focus on effective treatment of primary waste, low cost, etc. cost-effective effect

Inactive Publication Date: 2018-02-06
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
Problem 3 Pay attention to the effective treatmen

Method used

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  • Method for preparing tobermorite and magnetic hydrotalcite by utilizing industrial wastes
  • Method for preparing tobermorite and magnetic hydrotalcite by utilizing industrial wastes
  • Method for preparing tobermorite and magnetic hydrotalcite by utilizing industrial wastes

Examples

Experimental program
Comparison scheme
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

The invention provides a method for preparing tobermorite and magnetic hydrotalcite by utilizing industrial wastes, relates to a treatment method for the industrial wastes and specifically relates tothe technical field of the comprehensive utilization for the industrial wastes, such as, coal ash, white clay and waste acids and the synthetic method for the wastewater treatment material. Accordingto the invention, the coal ash, white clay and waste acids are prepared into tobermorite and magnetic hydrotalcite in the manner of burning and activating with white clay and high-sulfur coal, distilling, performing distilling extraction, extracting and separating, compounding and treating three-wastes. According to the invention, burning and activating are integrated for achieving an energy-saving environment-friendly technical effect; the waste gradient extraction is capable of treating the wastes while realizing the separation and purification of the corresponding components; the combination of exhaust gas emission and mother liquor treatment is adopted for realizing the three-wastes effective treatment.

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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IPC IPC(8): C01F7/00C01B33/24B09B3/00F23G7/00F23G5/30B01D3/00
CPCB01D3/00F23G5/30F23G7/00C01B33/24C01F7/785B09B3/80
Inventor 张宏森杨德智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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