Method for preparing light brick by using metallurgical waste slag

A technology for lightweight bricks and adobes, which is applied in the field of preparation of lightweight bricks, can solve the problems of large consumption of land resources and high energy consumption of solid blocks, and achieve the effects of good thermal insulation and sound insulation, and 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 preparing light brick by using metallurgical waste slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, 4000kg of red mud (Bayer process red mud) and 2000kg of fly ash and 4000kg of quicklime are dried and then finely ground respectively. %above. After fine grinding, mix the fly ash, quicklime and red mud evenly, add 7000kg of water to the mixed powder and stir, and stir evenly to obtain a slurry, which is transported to a pressure molding machine and under a pressure of 10MPa Pressed into adobe of 200mm*100mm*60mm shape. The adobe is sent to the drying oven through the conveyor belt, the temperature in the drying oven is 120°C, the drying time is 2h, and the water content of the adobe after drying is less than 1%. Send the dried bricks into the roasting furnace for roasting, the roasting temperature is 1000°C, 1150°C, 1100°C, 1200°C, the holding time is 10min, 20min, 30min, 45min respectively, and 4 batches of roasted lightweight bricks are obtained; 4 batches of lightweight bricks that have been roasted are cooled to room temperature to obtain...

Embodiment 2

[0031] like figure 1 As shown, 2000kg of red mud (Bayer process red mud), 1000kg of copper slag, 1000kg of nickel slag, 1000kg of fly ash and 3000kg of quicklime are dried and then finely ground respectively. Those below the order account for more than 90% of the overall quality. After fine grinding, mix the fly ash, quicklime and red mud evenly, add 5600kg of water to the mixed powder and stir, and stir evenly to obtain a slurry, which is transported to a pressure molding machine and under a pressure of 10MPa Pressed into adobe of 200mm*100mm*60mm shape. The adobe is sent to the drying oven through the conveyor belt, the temperature in the drying oven is 120°C, the drying time is 2h, and the water content of the adobe after drying is less than 1%. Send the dried bricks into the roasting furnace for roasting, the roasting temperature is 1000°C, 1150°C, 1100°C, 1200°C, the holding time is 10min, 20min, 30min, 45min respectively, and 4 batches of roasted lightweight bricks are...

Embodiment 3

[0033] like figure 1 As shown, 1000kg of copper slag, 1000kg of fly ash and 3000kg of quicklime are dried and then finely ground. After fine grinding, mix the fly ash, quicklime and red mud evenly, add 3500kg of water to the mixed powder and stir, and stir evenly to obtain a slurry, which is transported to a pressure molding machine and under a pressure of 10MPa Pressed into adobe of 200mm*100mm*60mm shape. The adobe is sent to the drying oven through the conveyor belt, the temperature in the drying oven is 105°C, the drying time is 10h, and the water content of the adobe after drying is less than 1%. Send the dried bricks into the roasting furnace for roasting, the roasting temperature is 1000°C, 1150°C, 1100°C, 1200°C respectively, and the holding time is 10min, 20min, 30min, 45min respectively, and 4 batches of roasted lightweight bricks are obtained; 4 batches of light bricks that have been roasted are cooled to room temperature to obtain finished lightweight bricks; aft...

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Abstract

The invention relates to a method for preparing light brick by using metallurgical waste slag. The method comprises the following steps that 1, discarded metallurgical slag, pulverized fuel ash and quick lime are dried and are respectively grinded finely; 2, 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 light brick is obtained. The light brick produced by utilizing discarded metallurgical slag, the pulverized fuel ash and the quick lime and adopting the light brick producing technological process of a process including fine grinding, material preparation, slurrying, forming, drying and roasting 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 discarded metallurgical slag is adopted as the raw material, the method has the advantages of being environmentally friendly and saving energy.

Description

technical field [0001] The invention relates to a method for preparing lightweight bricks, in particular to a method for preparing lightweight bricks from metallurgical waste slag, and also relates to the lightweight bricks prepared by the method. Background technique [0002] Metallurgical waste slag is a by-product of the metal industry, which has the disadvantages of large output, complex types, and strong environmental hazards, but at the same time it has a great prospect of utilization. At present, many works have been carried out on the utilization of metallurgical waste slag at home and abroad, mainly focusing on the production of building materials such as cement or research on road paving and sea reclamation. [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. The government is currently promoting green buildings, act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/138C04B33/132C04B33/135C04B33/32C04B38/00
CPCC04B33/1322C04B33/1328C04B33/1352C04B33/138C04B33/32C04B38/00C04B2235/3208C04B2235/656C04B2235/77C04B2235/96C04B38/0067Y02P40/60
Inventor 吴道洪陈士朝边妙莲马冬阳孙辉曹志成薛逊
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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