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Method for preparing high sulfur coal gangue sintered perforated brick

A technology of high-sulfur coal gangue and porous bricks, applied to ceramic products, other household appliances, household appliances, etc., can solve the problems of corroding equipment, polluting the surrounding environment, and being difficult to use, so as to achieve low production costs and protect land resources. , the effect of reducing harm

Inactive Publication Date: 2012-07-18
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for high-sulfur coal gangue, due to the release of a large amount of SO during its sintering 2 , corrode equipment, and pollute the surrounding environment, making it difficult to use in the process of resource utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] All the limestone is crushed to pass through a 120-mesh sieve, and the particle size is below 0.125 mm. The carbide slag is mixed with the crushed limestone at a mixing ratio of carbide slag:limestone=4:1, and then stirred evenly to obtain a sulfur-fixing agent. Among them, the portion of the calcium carbide slag with a particle size of 10-50 μm accounts for 80% of the total weight of the carbide slag.

[0024] Fully mix high-sulfur coal gangue (sulfur content 5.24%), washed gangue and shale at a weight ratio of 30%, 10% and 60% respectively, and then crush it to a size below 2mm, and the part with a particle size below 0.3mm Accounting for 71% of the total weight of high-sulfur coal gangue, washing gangue and shale, the calorific value of the mixed material is 450kcal / kg; adding a sulfur fixative, the amount added is 4% of the total weight of high-sulfur coal gangue and shale %, to obtain brick-making materials.

[0025] Add water to the brick-making material and stir...

Embodiment 2

[0030] All the limestone is crushed to pass through a 120-mesh sieve, and the particle size is below 0.125 mm. The carbide slag is mixed with the crushed limestone at a mixing ratio of carbide slag:limestone=1:1, and then stirred evenly to obtain a sulfur-fixing agent. The portion of the calcium carbide slag with a particle size of 10-50 μm accounts for 70% of the total weight of the carbide slag.

[0031] Fully mix high-sulfur coal gangue (sulfur content 5.24%), washing gangue and self-combustion gangue at a weight ratio of 30%, 20% and 50% respectively, and then crush them to a size below 2mm, and the part with a particle size below 0.3mm Accounting for 72% of the total weight of high-sulfur coal gangue, gangue washing and self-combustion gangue, the calorific value of the mixed material is 500kcal / kg; adding a sulfur fixation agent in an amount of 5% of the total weight of high-sulfur coal gangue and shale. %, to obtain brick-making materials.

[0032] Add water to the bri...

Embodiment 3

[0037] All the limestone is crushed to pass through a 120-mesh sieve, and the particle size is below 0.125 mm. The carbide slag is mixed with the crushed limestone at a mixing ratio of carbide slag:limestone=2:1, and then stirred evenly to obtain a sulfur-fixing agent. Among them, the portion of the calcium carbide slag with a particle size of 10-50 μm accounts for 90% of the total weight of the carbide slag.

[0038] Fully mix high-sulfur coal gangue (with a sulfur content of 5.24%) and shale at a weight ratio of 30% and 70% respectively, and then pulverize them to a size below 2mm. 75% of the total weight of the shale, and the calorific value of the mixed material is 400kcal / kg; adding a sulfur fixation agent in an amount of 7% of the total weight of the high-sulfur coal gangue and shale to obtain a brick-making material.

[0039] Add water to the brick-making material and stir evenly. The amount of water added is 12% of the weight of the brick-making material. After stirrin...

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Abstract

The invention discloses a method for preparing a high sulfur coal gangue sintered perforated brick, which relates to a method for preparing a building material. The method comprises the following steps of: (1) crushing limestone, then mixing with acetylene sludge, and stirring the mixture evenly to obtain a sulfur-fixing agent; (2) mixing high sulfur coal gangue with mining slag, then crushing the mixture, and adding the sulfur-fixing agent to obtain a brickmaking material; (3) adding water into the brickmaking material, stirring the mixture evenly, and placing the mixture for 48 to 72h undersealing conditions to obtained an aged material; (4) adding the water into the aged material, performing roller compaction and stirring on the mixture, and pressing the mixture into a green brick; and(5) placing the green brick into a drying kiln for drying, placing the dried green brick into a roasting kiln, and roasting to obtain the high sulfur coal gangue sintered perforated brick. The method can fix SO2 gas in the form of sulfate, prolong the service life of equipment, and reduce the hazard of the high sulfur coal gangue.

Description

technical field [0001] The invention relates to a preparation method of building materials, in particular to a preparation method of high-sulfur coal gangue sintered porous bricks. Background technique [0002] my country is one of the countries with the most serious sulfur dioxide pollution in the world. In 2005, SO 2 The total emission is as high as 25.49 million tons, ranking first in the world, and the economic loss caused is as high as 500 billion yuan, and the annual growth rate is still about 5% in recent years. Due to my country's control of SO emissions from combustion 2 The treatment of pollution is still in its infancy, causing acid rain pollution in some areas to become increasingly serious. At present, the area covered by acid rain in my country has accounted for 40% of the total land area. Therefore, how to reduce SO 2 Emissions have become an urgent problem to be solved in our country. [0003] China is a big coal country, and the coal gangue produced every...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B30/02
Inventor 邢军邱景平孙晓刚牛雷雷徐世达冯慎明施秋峰武振华黄文柏
Owner NORTHEASTERN UNIV LIAONING
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