Method for manufacturing perforated brick by using red mud

A technology of porous bricks and red mud, applied in clay products, ceramic products, applications, etc., can solve the problems of large consumption of land resources and high energy consumption of solid blocks, and achieve the effect of low density

Pending Publication Date: 2017-05-31
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the development of my country's construction industry, the use of solid blocks has been banned due to the disadvantages of high energy consumption and large consumption of land resources.

Method used

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  • Method for manufacturing perforated brick by using red mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, 5000kg of red mud (Bayer process red mud) and 2000kg of fly ash and 3000kg of quicklime are dried and then finely ground respectively. %above. After fine grinding, the fly ash, quicklime and red mud are mixed evenly, and a pore-forming agent with a volume fraction of 50% of the total volume of the mixture of fly ash, quicklime and red mud is added, and the pore-forming agent is 20 parts by weight of starch , 20 parts by weight of cellulose and 60 parts by weight of sawdust are mixed, and the average particle size of the pore-forming agent is 1mm. Fly ash, quicklime, red mud and pore-forming agent are fully mixed, then add 1000kg of water for stirring, and stir evenly to obtain a slurry, which is transported to a pressure molding machine and pressed at a pressure of 10MPa to form 200mm*100mm* 60mm shape adobe. The bricks are sent to the drying oven through the conveyor belt. The temperature in the drying box is 120°C, the drying time is 2 ho...

Embodiment 2

[0035] Such as figure 1 As shown, 5000kg red mud (sintered red mud) is dried with 2000kg of fly ash and 3000kg of quicklime, and then finely ground respectively. %above. After fine grinding, the fly ash, quicklime, and red mud are mixed evenly, and a pore-forming agent with a volume fraction of 60% of the total volume of the mixture of fly ash, quicklime, and red mud is added, and the pore-forming agent is 20 parts by weight of starch , 30 parts by weight of polystyrene foam particles and 50 parts by weight of sawdust are mixed, and the average particle size of the pore-forming agent is 2 mm. Fly ash, quicklime, red mud and pore-forming agent are fully mixed, then add 1000kg of water for stirring, and stir evenly to obtain a slurry, which is transported to a pressure molding machine and pressed at a pressure of 10MPa to form 200mm*100mm* 60mm shape adobe. The bricks are sent to the drying oven through the conveyor belt. The temperature in the drying oven is 120°C, and the d...

Embodiment 3

[0037] Such as figure 1 As shown, 4000kg of red mud (the mass ratio of Bayer red mud to sintering red mud is 1:1), 1000kg of fly ash and 2000kg of quicklime are dried and then finely ground respectively. Those below 200 mesh account for more than 90% of the overall quality. After fine grinding, the fly ash, quicklime and red mud are mixed evenly, and a pore-forming agent with a volume fraction of 40% of the total volume of the mixture of fly ash, quicklime and red mud is added, and the pore-forming agent is 20 parts by weight of starch , 30 parts by weight of polystyrene foam particles and 50 parts by weight of sawdust are mixed, and the average particle size of the pore-forming agent is 2 mm. Fly ash, quicklime, red mud and pore-forming agent are fully mixed, then add 700kg of water for stirring, and stir evenly to obtain a slurry, which is transported to a pressure molding machine and pressed at a pressure of 1MPa to 200mm*100mm* 60mm shape adobe. The bricks are sent to t...

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Abstract

The invention relates to a method for manufacturing a perforated brick by using red mud. The method comprises the following steps that 1, pulverized fuel ash, quick lime and the red mud are dried and then are finely grinded respectively; 2, a pore forming agent is added and water is added to prepare slurry; 3, the slurry is put in a mold and is pressurized and formed to obtain a green brick, and the green brick is dried; 4, the dried green brick is roasted, and the roasted green brick is cooled to room temperature, and the perforated brick is obtained. The red mud, the pulverized fuel ash and the quick lime are prepared by adopting a fine mill, the pore forming agent is added for uniform slurry preparation, the slurry is pressurized and formed, and the perforated brick produced through the technological process of a block drying and roasting process has the advantages of being light, low in density and good in heat insulation and preservation and sound insulation. Due to the fact that the red mud is adopted as the raw material, the method has the advantages of being environmentally friendly and saving energy. The added pore forming agent makes the density of the perforated brick smaller than 350 kg/m-3, and the requirements for low density and light weight are achieved really.

Description

technical field [0001] The invention relates to a method for preparing porous bricks, in particular to a method for preparing porous bricks from red mud. Background technique [0002] Red mud is a by-product of the alumina industry. The production of 1 ton of alumina will produce 1.1-1.5 tons of red mud. With the rapid development of the alumina industry in recent years, my country's alumina production in 2012 was 42.14 million tons, and the red mud discharge was about 50-60 million tons. Red mud is a kind of bulk waste in our country. There is no effective treatment method yet, and the method of storage is still used for disposal. At present, the total storage capacity has exceeded 200 million tons. The method of land storage will not only occupy a large amount of land, but also due to the strong alkalinity of red mud, once the tailings dam breaks, it will cause great harm to personal and property safety and the ecological environment. In addition, there are about 20% alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/135C04B33/132C04B33/32C04B38/06
CPCC04B33/1322C04B33/1328C04B33/1352C04B33/32C04B38/0675C04B2235/3208C04B2235/656C04B2235/77C04B38/0645C04B38/0067C04B38/067Y02P40/60
Inventor 陈士朝边妙莲马冬阳孙辉曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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