Casting-fly-ash ceramsite and preparation method thereof

Abstract

The invention discloses a casting-fly-ash ceramsite. The casting-fly-ash ceramsite is prepared from a plurality of raw materials through mixing, granulation and maintenance. The plurality of raw materials are composed of, by weight, 95 to 105 parts of casting fly ash, 10 to 50 parts of Portland cement, 1 to 5 parts of redispersible latex powder, 1 to 5 parts of polyvinyl alcohol, 1 to 5 parts of a water reducer solution and 0 to 5 parts of bentonite. A preparation method for the casting-fly-ash ceramsite comprises the following steps: preparing the raw materials according to the above weight parts; then mixing the casting fly ash, the Portland cement, the redispersible latex powder, polyvinyl alcohol, the water reducer solution and bentonite; carrying out granulation on a mixture formed in the previous step; and subjecting pellets obtained after granulation to sealing and thermal insulation and then to maintenance. The casting-fly-ash ceramsite and the preparation method thereof realize effectively utilization of casting fly ash; the sintering-free preparation method better reduces energy consumption; so cost is reduced and environment is protected. The casting-fly-ash ceramsite has the advantages of low density, high strength, high particle integrity, etc.

Description

technical field [0001] The invention relates to the technical field of ceramsite production, in particular to a casting dust-removing ash ceramsite and a preparation method thereof. Background technique [0002] Ceramsite, as the name suggests, is ceramic particles. Most of the appearance characteristics of ceramsite are round or elliptical spheres, but there are also some gravel-like ceramsites that are not round or elliptical spheres, but irregular gravel. The shape of ceramsite varies from process to process. Its surface is a hard shell, which is pottery or enamel, which has the function of water-proof and air-retaining, and gives ceramsite high strength. The appearance and color of ceramsite vary with the raw materials and techniques used. [0003] The existing ceramsite products mainly include: ceramsite made of clay and loamy clay as the main raw materials; in order to save energy resources, effectively protect cultivated land and the environment, and promote the co...

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Problems solved by technology

[0003] The existing ceramsite products mainly include: ceramsite made of clay and sub-clay as the main raw materials; in order to save energy resources, effectively protect the cultivated land and the environment, and promote the comprehensive utilization of resources, the use of clay has been restricted

There is also a ceramsite made from shale, slate, etc. after crushing, screening, or grinding, but the energy consumption and cost are high, and there will be slight radiation when used indoors, which will cause damage to the human body.

[0004] There will be dust emission during the casting production process. According to statistics, the dust generated by casting in the country can reach 300,000 tons. For a long time, there has been no effective treatment method. It is only stacked or buried in the open air. This kind of waste sand and dust contains metal oxides. It is mainly composed of silicon aluminum, oxides of calcium, magnesium and iron, and a small amount of sodium and potassium. Studies have shown that metal pollutants in sand dust can inhibit the activity of microorganisms in the soil, and randomly piled up to occupy land resources and destroy ecosystem

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