Preparation method of light-weight and high-intensity coal ash ceramsites

A technology for fly ash ceramsite and fly ash, which is applied in the production of ceramic products, clay products, and ceramic materials, etc., can solve the problems of low strength, low porosity, low spheroidization rate, etc. The effect of increased ball rate and increased strength

Active Publication Date: 2017-02-15
PANZHIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: low ball forming rate, low

Method used

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  • Preparation method of light-weight and high-intensity coal ash ceramsites
  • Preparation method of light-weight and high-intensity coal ash ceramsites
  • Preparation method of light-weight and high-intensity coal ash ceramsites

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preparation example Construction

[0017] The present invention provides a method for preparing lightweight and high-strength fly ash ceramsite, which includes the following steps: weighing fly ash, pore forming agent, flux, binding agent and reinforcing agent, ball milling, and adding disc granulator to perform Granulation and calcining to obtain lightweight and high-strength fly ash ceramsite.

[0018] Wherein, in the above-mentioned preparation method of light-weight high-strength fly ash ceramsite, the added amount of the fly ash, pore former, flux, binding agent and reinforcing agent are respectively: in parts by weight, 70 parts by weight of fly ash ~90 parts, 0.5-4 parts of pore former, 0.5-4 parts of flux, 5.5-17 parts of binding agent, 1-10 parts of reinforcing agent.

[0019] In order to improve the porosity, the present invention adds limestone as a pore-forming agent and fluxing agent. Limestone can be decomposed to produce CO at high temperatures. 2 The gas plays the role of foaming, and at the same tim...

Embodiment 1～2

[0027] Examples 1-2 Preparation of ceramsite by the method of the present invention

[0028] Dry the raw materials to a moisture content of ≤6wt%, and weigh various materials according to the formula in Table 1. The ground and mixed materials are all passed through a 250-mesh sieve, rolled into balls by a disc ball machine, and calcined at 1100°C to obtain a lightweight high-strength fly ash ceramsite product.

[0029] Table 1 Production ratio of fly ash ceramsite

[0030]

[0031]

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Abstract

The invention belongs to the field of manufacturing of ceramsites, and particularly relates to a preparation method of light-weight and high-intensity coal ash ceramsites. Aiming at the problems of low balling rate, low porosity, low intensity and the like during preparation of the ceramsites from coal ash in the prior art, the invention provides the preparation method of the light-weight and high-intensity coal ash ceramsites. The preparation method comprises the following steps: adding a pore forming material, a fluxing agent, a binding agent and an enhancer in coal ash, controlling the particle size and the moisture content of the raw materials, and performing granulation through a disk granulator. By the reasonable cooperation of the pore forming material, the fluxing agent, the binding agent and the enhancer, the prepared coal ash ceramsites are high in porosity and balling rate, and the intensity of the ceramsites is substantially enhanced; the preparation method has obvious economic benefits.

Description

Technical field [0001] The invention belongs to the field of ceramsite production, and specifically relates to a preparation method of lightweight and high-strength fly ash ceramsite. Background technique [0002] Fly ash is one of the largest industrial waste residues in my country. With the development of the power industry, the discharge of fly ash from coal-fired power plants is increasing year by year. If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere. If discharged into the water system, the river will be blocked, and the toxic chemicals in it will also cause harm to humans and organisms. At present, the main use of fly ash is as a concrete admixture, with low added value. In order to make full use of fly ash to develop high value-added products, fly ash can be developed into fly ash ceramsite. The main raw material of fly ash ceramsite is fly ash (accounting for about 80% of the total raw materials) mixed with a proper proport...

Claims

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Application Information

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IPC IPC(8): C04B33/135C04B33/13C04B33/132C04B38/06
CPCC04B33/131C04B33/1324C04B33/1352C04B38/009C04B2235/3217C04B2235/3427C04B2235/349C04B2235/442C04B38/06Y02P40/60
Inventor 李亮
Owner PANZHIHUA UNIV
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