Ceramsite material with high proportion of coal ash for water treatment

A technology with high proportion of fly ash ceramsite, applied in the field of materials, can solve the problems of easy loosening of materials and reduced strength, etc.

Inactive Publication Date: 2013-07-10
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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AI Technical Summary

Problems solved by technology

[0004] Because the proportion of fly ash increases, the material is easy to loose and the strength will decrease

Method used

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  • Ceramsite material with high proportion of coal ash for water treatment

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Embodiment 1

[0027] A high-proportion fly ash ceramsite material used for water treatment, its raw material composition and content are as follows:

[0028] Fly ash 85g (85%)

[0029] Dewatered sludge 10.5g (10.5%)

[0030] Clay 0.5g (0.5%)

[0031] Desulfurized gypsum 4g (4%);

[0032] The fly ash is the fly ash of a power plant in Waigaoqiao, Shanghai, and its particle size is 1-200 μm;

[0033] The dewatered sludge is dewatered sludge from Shanghai Quyang Water Purification Plant, and its water content is 75%;

[0034] Described clay is the clay that pulverizes and dries through 80 mesh sieves;

[0035] The desulfurized gypsum is desulfurized gypsum from Shanghai Waigaoqiao Power Plant, with a particle size of 200-300 mesh.

[0036] A kind of preparation method of above-mentioned high-proportion fly ash ceramsite material that is used for water treatment comprises the following steps:

[0037] (1) Pour 85g of fly ash, 10.5g of dewatered sludge, 0.5g of clay and 4g of desulfurized ...

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Abstract

The invention discloses a ceramsite material with high proportion of coal ash for water treatment. The material comprises 85% of the coal ash, 10.5% of dewatered sludge, 0.5% of clay and 4% of desulfurization gypsum, wherein the porosity reaches 55.86%, and the specific surface area reaches 3.16m<2>/g. The stacking density of the ceramsite material with high proportion of the coal ash for the water treatment is 0.49g/cm<3>, the apparent density is 0.11g/cm<3>, the sum of the breakage ratio and the wear ratio is 1.14, and the solubility in hydrochloric acid is 1.98, namely each index can meet the requirements of each item specified in Ministry of Construction ''Artificial Ceramsite Filter Material for Water Treatment'' CJ/T299-2008; and especially the sum of the breakage ratio and the wear ratio and the solubility in the hydrochloric acid reaches the standard, so the strength performance of the ceramsite material with high proportion of the coal ash is stable. If the ceramsite material with high proportion of the coal ash is applied to the water treatment, the treatment of the wastes by using the wastes can be achieved.

Description

technical field [0001] The invention belongs to the field of materials and the technical field of waste water treatment, and in particular relates to a high-proportion fly ash ceramsite material for water treatment which is sintered at high temperature with fly ash and desulfurized gypsum as main raw materials. technical background [0002] The use of fly ash to make ceramsite materials has a history of several decades, and it was mainly used in the field of construction at the earliest, as light aggregates for building materials. Later, according to its advantages of high porosity, large specific surface area and light weight, it was gradually applied to the field of water treatment. [0003] In the fly ash water treatment ceramsite materials developed in the past, the proportion of fly ash is generally about 50%, and the maximum is no more than 70%. The higher the content of fly ash, the higher the porosity, the smaller the specific gravity of the material, and the better...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/00C04B33/132C04B38/00
CPCY02P40/60
Inventor 周笑绿吴南江王道京朱蕊洁张琛李倩炜张艺冉
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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