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Method for preparing thermal-insulation fired bricks through adoption of waste slurry
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A technology for thermal insulation sintering and waste mud, which is used in applications, household appliances, clay products, etc., can solve problems such as reducing production costs and environmental pollution, and achieve the effects of reducing production costs, solving environmental pollution problems, and satisfying recycling.
Inactive Publication Date: 2018-02-16
望江县中山新型建材有限公司
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Problems solved by technology
[0004] The invention proposes a method for preparing thermal insulation sintered bricks by using waste mud. Compared with ordinary clay sintered bricks, the invention meets the requirements of compressive strength while reducing production costs, and has light thermal insulation performance, which solves the problem of waste The problem of mud treatment solves the problem of environmental pollution caused by waste mud, protects cultivated land resources, realizes the recycling of waste mud and meets the needs of building energy conservation
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Embodiment 1
[0021] A method for preparing thermal insulation sintered bricks by using waste mud, comprising the steps of:
[0022] S1. Weigh 50 parts of waste mud, 20 parts of asbestos compound, 8 parts of nitric acid solution with a concentration of 3wt%, 5 parts of silica sol, and 2 parts of wheat straw by weight, stir at a temperature of 90 ° C, and use a plate and frame filter press Filter to obtain wet material;
[0023] S2. Mix 65 parts of wet material, 30 parts of zeolitepowder, 2 parts of sodium citrate, 4 parts of ammonia water, and 100 parts of water in parts by weight, and shape it to obtain a blank;
[0024] S3. Sending the billet into a sintering furnace for sintering to obtain a thermal insulation sintered brick.
Embodiment 2
[0026] A method for preparing thermal insulation sintered bricks by using waste mud, comprising the steps of:
[0027] S1. Weigh 40 parts of waste mud, 40 parts of asbestos compound, 4 parts of nitric acid solution with a concentration of 5wt%, 2 parts of silica sol, and 8 parts of wheat straw by weight, stir at a temperature of 80 ° C, and use a plate and frame filter press Filter to obtain wet material;
[0028] S2. Mix 85 parts of wet material, 20 parts of zeolitepowder, 4 parts of sodium citrate, 2 parts of ammonia water, and 118 parts of water in parts by weight, and shape it to obtain a blank;
[0029] S3. Sending the billet into a sintering furnace for sintering to obtain a thermal insulation sintered brick.
Embodiment 3
[0031] A method for preparing thermal insulation sintered bricks by using waste mud, comprising the steps of:
[0032] S1. Weigh 46 parts of waste mud, 30 parts of asbestos compound, 7 parts of nitric acid solution with a concentration of 4wt%, 4 parts of silica sol, and 3 parts of wheat straw by weight, stir at a temperature of 86 ° C for 16 minutes, and use plate and frame filter press Machinefiltration to obtain wet material;
[0033] Si in the silica sol 2 The O content is 30 wt%.
[0034] S2. Mix 70 parts of wet material, 27 parts of zeolite powder, 3 parts of sodium citrate, 3 parts of ammonia water, and 105 parts of water in parts by weight, and shape to obtain a blank;
[0035] S3, sending the billet into a sintering furnace for sintering, the sintering temperature is 1450° C., and the sintering time is 24 hours, to obtain heat preservation sintered bricks.
[0036] In the asbestos compound, stir 25 parts of oxidized polyethylenewax, 30 parts of asbestos powder, 1...
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Abstract
The invention discloses a method for preparing thermal-insulation fired bricks through adoption of waste slurry. The method comprises the following steps: weighing, by weight, 40-50 parts of waste slurry, 20-40 parts of an asbestos compound, 4-8 parts of a nitric acid solution with the concentration being 3-5 wt%, 2-5 parts of silica sol, and 2-8 parts of wheat straw, performing mixing, carrying out stirring at 80-90 DEG C, and performing filtration with a plate-and-frame filter press to obtain a wet material; mixing, by weight, 65-85 parts of the wet material, 20-30 parts of zeolitepowder, 2-4 parts of sodium citrate, 2-4 parts of ammonia water, and 100-118 parts of water, and performing molding to obtain a blank material; and sending the blank material to a firing furnace for firing toobtain the thermal-insulation fired bricks. Compared with fired bricks made from normal clay, the fired bricks meet the compressive strength requirement, are reduced in production cost, and have lightweight and thermal-insulation capability. The problem of treatment of waste slurry is solved, the problem that waste slurry causes environmental pollution is overcome, and the cultivated land resources are protected. Cyclic utilization of waste slurry is achieved, and the requirement of building energy conservation is satisfied.
Description
technical field [0001] The invention relates to the technical field of thermal insulation sintered bricks, in particular to a method for preparing thermal insulation sintered bricks by using waste mud. Background technique [0002] A large amount of waste mud produced in geotechnical engineering construction is mainly composed of clay, sewage, drilling cuttings and mud treatment agents. In the past, the random discharge of waste mud caused the pollution of a large number of urban rivers, and the rivers were silted up. In recent years, through the strict management of local government departments, this situation has been alleviated and the development of mud curing technology has also been promoted. However, due to the impact of transportation costs, the cost of mud curing has remained high, causing a huge economic burden on construction companies. [0003] At present, the mud cake formed after mud pressing can be used to prepare sintered bricks, which can not only solve the...
Claims
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Application Information
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