Method for preparing non-sintered ceramsite from activated sludge blended with fly ash
A technology of activated sludge and fly ash, which is applied in the direction of ceramic products, manufacturing tools, ceramic molding machines, etc., can solve the problems of large pollution, high cost of ceramsite, high density of non-fired ceramsite, etc., and achieve low cost and high density Lightweight, high porosity effect
Active Publication Date: 2012-02-15
HARBIN INST OF TECH
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A method for preparing a non-sintered ceramsite from activated sludge blended with fly ash relates to a preparation method of ceramsite and solves problems of high costs, huge pollution and large density of non-sintered ceramsite prepared by a sintering method. The method comprises steps of: 1. pretreating and mixing fly ash, gelling material and additive to obtain a powder; 2. mixing sludge froma secondary clarifier of a municipal sewage factory with the powder, putting into a balling comminutor to obtain the ceramsite; 3. curing the ceramsite by covering a moistening straw mat to obtain a first curing ceramsite; 4. curing the first curing ceramsite with steam. The invention employs sludge from the secondary clarifier of a municipal sewage factory and combusted fly ash from thermal power plant as raw materials to realize resource utilization and overcome disadvantages of high costs and severe pollution of the sintering method for preparing ceramsite; because of addition of sludge, the ceramsite has advantages of light unit weight high and increased amount of porosity reaching 45-60%, and can load a large biomass when used as a carrier in a processing engineering.
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Property | Measurement | Unit |
Particle size | 5.0 ~ 8.0 | mm |
Particle size | 6.0 | mm |
Strength | >= 5.0 | MPa |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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