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Formula and method for producing ceramsite by taking waste incineration fly ash as main body

A waste incineration fly ash and waste fly ash technology, which is applied in the production of ceramic materials, ceramic products, applications, etc., can solve the problems of complex process, high investment and operation costs, and limited popularization and promotion.

Pending Publication Date: 2021-09-10
湖南国发控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of ceramsite is a very promising treatment and resource utilization method for incineration fly ash and municipal sludge. However, the process of sludge drying is complicated and the investment and operation costs are high, which seriously limits the popularization and promotion of this method.

Method used

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  • Formula and method for producing ceramsite by taking waste incineration fly ash as main body
  • Formula and method for producing ceramsite by taking waste incineration fly ash as main body
  • Formula and method for producing ceramsite by taking waste incineration fly ash as main body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The composition of raw materials in this example is by weight: 25 parts of garbage fly ash, 40 parts of fly ash, 20 parts of low-quality kaolin, 5 parts of foaming agent, and 10 parts of combustion aid. Foaming agent is CaCO 3 , the combustion aid is CaO, and the specific process is as follows:

[0040] The first step, fly ash pretreatment

[0041] First, the fly ash is pretreated by water washing to fully dissolve the chlorine-containing compounds in the fly ash.

[0042] S1. According to the ratio of garbage fly ash to water 1:0.8, add water for full mixing, and stir evenly to speed up the dissolution efficiency, so as to achieve full leaching of chloride ions in fly ash.

[0043] S2. Separating the fly ash treated in step S1 from solid to liquid, using a filter press to make the water content in the fly ash filter residue within 10-20%, and transferring it to the mud bin for storage; In the example, a chemical precipitant is added to the filtrate, and then it is a...

Embodiment 2

[0055] The raw material in the present embodiment is composed of: 30 parts of garbage fly, 35 parts of fly ash, 20 parts of inferior kaolin, 5 parts of foaming agent, and 10 parts of combustion aid. Foaming agent is CaCO 3 , the combustion aid is CaO, and the specific process is as follows:

[0056] The first step, fly ash pretreatment

[0057] First, the fly ash is pretreated by water washing to fully dissolve the chlorine-containing compounds in the fly ash.

[0058] S1. According to the ratio of garbage fly ash to water 1:0.8, add water for full mixing, and stir evenly to speed up the dissolution efficiency, so as to achieve full leaching of chloride ions in fly ash.

[0059] S2. Separating the fly ash treated in step S1 from solid to liquid, using a filter press to make the water content in the fly ash filter residue within 10-20%, and transferring it to the mud bin for storage; In the example, a chemical precipitant is added to the filtrate, and then it is allowed to s...

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Abstract

The invention discloses a formula for producing ceramsite by taking waste incineration fly ash as a main body. The formula comprises, by weight, 25-50 parts of waste fly ash, 10-40 parts of fly ash, 20-40 parts of kaolin, 1-5 parts of a foaming agent and 10-20 parts of a combustion improver. The foaming agent is one or more of FeS, Fe2O3, FeO, C, CaMg(CO3)2, CaCO3 and SiC, and the combustion improver is one or more of K2O, Na2O, CaO and MgO. According to the formula and the method for producing the ceramsite by taking the waste incineration fly ash as the main body, heavy metals in the fly ash can be solidified by utilizing a synergistic effect among the raw material components, leaching is avoided, and harmlessness and recycling of the fly ash are realized.

Description

technical field [0001] The invention relates to the technical field of solid waste and hazardous waste treatment, in particular to a formula and method for producing ceramsite with waste incineration fly ash as the main body. Background technique [0002] Domestic waste incineration fly ash is the trappings of the flue gas purification system of domestic waste incineration facilities and the bottom ash settled at the bottom of the flue and chimney, referred to as "fly ash". Fly ash has both heavy metal hazard characteristics and organic pollutant hazard characteristics. Incineration fly ash contains high concentrations of heavy metals such as Pb, Cd, Cu, Cr, and Zn that are easily leached by water, as well as highly harmful dioxins. These pollutants can pollute water bodies and soils, thereby harming To the health of animals, plants and human body, therefore, it is necessary to carry out harmless treatment of waste incineration fly ash. [0003] At present, the common fly a...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B38/02C04B38/00C04B33/32C04B33/135C04B33/13C04B33/04
CPCC04B38/068C04B38/0025C04B38/02C04B38/009C04B33/1355C04B33/04C04B33/1352C04B33/131C04B33/32Y02P40/60
Inventor 黄强卢丰玉黄治齐
Owner 湖南国发控股有限公司
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