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Method for preparing light ceramsites by subway rail residue soil

A lightweight ceramsite and muck technology, applied in clay products, applications, household appliances, etc., can solve the problems of occupying land resources, polluting the environment, wasting transportation resources, etc. The effect of high operability

Inactive Publication Date: 2016-11-23
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current muck disposal method is simply landfilling and discarding, and transporting it to the suburbs and villages without any treatment, or directly stacking it in a place far from the construction site, which not only takes up a lot of land resources, but also pollutes the environment and wastes transportation. resource

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get the Tianjin subway track slag under the natural air-dried state and dry grind it through a ball mill for 30 minutes, and the slag after the dry grinding passes through a 100 mesh sieve; get the slag and powder according to the mass percentage of slag: fly ash=75%: 25%. Coal ash is uniformly mixed to obtain a mixture; add water and stir to make a mixed slurry with a water-solid ratio of 15%; use a granulator to granulate the mixed slurry into balls, pass the ball through a square hole sieve, and select a particle size of 15-25mm and 10-15mm material balls, put them into a constant temperature blast drying oven at 105°C and dry them at a constant temperature for more than 4 hours.

[0022] Pre-lay 3-5mm quartz sand particles on the surface of the ceramic fiber board, then spread the dried balls on the ceramic fiber board, and place them in a silicon-molybdenum rod box-type resistance furnace, at 8-10°C / min The heating rate is raised from room temperature to 500°C, and...

Embodiment 2

[0025] Get the Tianjin subway track slag under the natural air-dried state and dry grind it through a ball mill for 30 minutes, and the slag after the dry grinding passes through a 100-mesh sieve; get the slag and powder according to the mass percentage of slag: fly ash=70%: 30%. Coal ash is uniformly mixed to obtain a mixture; add water and stir to make a mixed slurry with a water-solid ratio of 20%; use a granulator to granulate the mixed slurry into balls, pass the ball through a square hole sieve, and select a particle size of 15-25mm and 10-15mm material balls, put them into a constant temperature blast drying oven at 105°C and dry them at a constant temperature for more than 4 hours.

[0026] Pre-lay 3-5mm quartz sand particles on the surface of the ceramic fiber board, then spread the dried balls on the ceramic fiber board, and place them in a silicon-molybdenum rod box-type resistance furnace, at 8-10°C / min The heating rate is raised from room temperature to 500°C, and...

Embodiment 3

[0029] Get the Tianjin subway track slag under the natural air-dried state and dry grind it through a ball mill for 30 minutes, and the slag after the dry grinding passes through a 100-mesh sieve; get the slag and powder according to the mass percentage of slag: fly ash=60%: 40%. Coal ash is uniformly mixed to obtain a mixture; add water and stir to make a mixed slurry with a water-solid ratio of 25%; use a granulator to granulate the mixed slurry into balls, pass the ball through a square hole sieve, and select a particle size of 15-25mm and 10-15mm material balls, put them into a constant temperature blast drying oven at 105°C and dry them at a constant temperature for more than 4 hours.

[0030] Pre-lay 3-5mm quartz sand particles on the surface of the ceramic fiber board, and then dry the balls

[0031] Spread it on a ceramic fiber board and place it in a silicon-molybdenum rod box-type resistance furnace, heat it up from room temperature to 500°C at a heating rate of 8-10...

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PUM

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Abstract

The invention discloses a method for preparing light ceramsites by subway rail residue soil. The method includes the steps: drily grinding the subway rail residue soil by a ball grinder, then sieving the dry grinded residue soil by a sieve with100 meshes, uniformly mixing the sieved residue soil and coal ash according to a weight percentage, and preparing a mixed slurry according to water-solid ratio; performing granulation for the mixed slurry by a granulator to form balls, selecting the balls with grain diameters of 15-25mm and 10-15mm, and placing the selected balls into a constant temperature air blast drying oven with the temperature of 105 DEG C to dry by constant temperature for 4 hours or more than; tiling the dried balls on a ceramic fiber board, placing the tiled balls in a silicon-molybdenum box-type resistance furnace, increasing the temperature to 500 DEG C from the indoor temperature by the heating speed of 8-10 DEG C per minute, preheating for 20 minutes, then increasing the temperature to 1160-1250 DEG C by the heating speed of 8-10 DEG C per minute, roasting for 15 minutes, placing roasted ceramsites in a ventilated kitchen to naturally cool to the indoor temperature, and sieving the roasted ceramsites to obtain the light ceramsites. The weight percentage of the residue soil and the coal ash is 50%-85%:15%-50%, and the water-solid ratio is 15%-30%. The prepared ceramsites meet standard requirements of artificial lightweight aggregates in GB / T17431.1-2010 and GB / T17431.2-2010 and has the excellent advantages of high strength, multiple hole, high temperature resistance and the like and can serve as high-efficiency support agents for precast concrete components and thermal insulation materials of walls.

Description

technical field [0001] The invention relates to a method for preparing lightweight ceramsite by utilizing engineering dregs. Background technique [0002] With the rapid development of the national economy, all kinds of garbage in the city are also increasing rapidly. As a part of urban garbage, engineering dregs account for 30%-40% of the total garbage. The current muck disposal method is simply landfilling and discarding, and transporting it to the suburbs and villages without any treatment, or directly stacking it in a place far from the construction site, which not only takes up a lot of land resources, but also pollutes the environment and wastes transportation. resource. [0003] How to change the traditional treatment method of engineering slag is the subject of many scientific research institutes. Contents of the invention [0004] Tianjin subway track muck is facing the same problem. In order to promote the comprehensive utilization of the engineering dregs and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/132C04B33/135
CPCC04B33/132C04B33/1352C04B38/009C04B38/0067Y02P40/60
Inventor 荣辉张腾飞王海良张磊邸志鲲宋伟俊齐占国李向海
Owner TIANJIN CHENGJIAN UNIV
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