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Fly ash ceramsite preparation process

A technology of fly ash ceramsite and preparation process, which is applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc., to achieve the effects of good earthquake resistance, good seismic performance, and good thermal insulation

Inactive Publication Date: 2015-03-18
DALIAN HENGXIANG FLY ASH INTEGRATION UTILIZATION
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of fly ash collection and reuse, the invention provides a preparation process of fly ash ceramsite

Method used

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Embodiment Construction

[0009] Fly ash is a finely dispersed material. Most of them are spherical, with smooth surface and small micropores, and a small part are aggregate particles with rough surface and many corners. Therefore, fly ash particles vary in size and shape, and are used in cement, brick, concrete, lightweight concrete, aerated concrete, and aggregates. Poor quality ash can be used to pave roads, make foundations and fill materials.

[0010] In the fly ash ceramsite processing technology of the present invention, 50% to 80% of fly ash (88 μm sieve at 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, SO 3 . In addition to improving the plasticity of the mixture and improving the mechanical and stability of the raw material, the role of the binder can also play a role in flux during roasting and improve the quality of fly ash ceramsite. The plasticity index of clay should be greater than 12.

[0011] The requirements for binders for the production of fly ash ceramsite are as follows: The selectio...

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Abstract

The invention relates to a fly ash ceramsite preparation process, which comprises: doping 10-20% of water into 50-80% of fly ash and 20-40% of a binder, mixing into balls, drying for 12-24 h at a room temperature, placing into a constant temperature oven with a temperature of 70 DEG C to dry for 2-4 h, and carrying out high temperature calcination for 1 h at a temperature of 1200-1300 DEG C to obtain the ceramsite. According to the present invention, the fly ash ceramsite produced through the fly ash ceramsite preparation process has characteristics of low density, light weight and heat insulation; the internal of the fly ash ceramsite has the porous structure so as to provide the good thermal insulation; fire resistance is good, wherein the ceramsite has excellent fire resistance, and the fire resistance of the fly ash ceramsite is more than four times compared with the fire resistance of the ordinary concrete; shock resistance is good, wherein the ceramsite concrete has characteristics of light weight, low elastic modulus and good deformation resistance so as to provide the good shock resistance; water absorption is low, and frost resistance and durability are good; and acid corrosion resistance, alkali corrosion resistance and frost resistance of the ceramsite concrete are superior to acid corrosion resistance, alkali corrosion resistance and frost resistance of the ordinary concrete.

Description

technical field [0001] The invention relates to the technical field of fly ash processing and reuse, in particular to a process for processing fly ash ceramsite. Background technique [0002] my country's energy consumption and pollution are relatively large. Thermal power generation is one of the largest sources of pollution in my country. 72% of my country's coal is used for power generation, resulting in many by-products of coal combustion, a large part of which is fly ash. In 2000, my country's fly ash discharge reached 100 million tons, which is a burden to the environment. At the same time, with the large demand for clay in the construction industry, it has affected the quality and quantity of farmland. Therefore, it is a meaningful subject to prepare ceramsite by using fly ash. The way to effectively deal with fly ash is to prepare ceramsite. [0003] Fly ash ceramsite is mainly used to prepare light aggregate concrete (also known as fly ash ceramsite concrete), w...

Claims

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Application Information

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IPC IPC(8): C04B18/08
CPCY02W30/91
Inventor 马民政
Owner DALIAN HENGXIANG FLY ASH INTEGRATION UTILIZATION
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