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Method for preparing coal gangue perforated brick by taking high-calcium graphite milltailing sand as filler

A technology of tailings sand and porous bricks, applied in applications, ceramic products, household utensils, etc., can solve the problems of waste, environmental pollution, low plasticity, etc., and achieve the effects of reducing land occupation and storage, saving resources, and high strength

Inactive Publication Date: 2010-12-15
黑龙江奥宇石墨集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the current problem that graphite dressing tailings sand contains high CaO, has extremely low plasticity, cannot be used to produce wall materials, and is discarded and pollutes the environment. The method of coal gangue porous brick

Method used

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  • Method for preparing coal gangue perforated brick by taking high-calcium graphite milltailing sand as filler

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specific Embodiment approach 1

[0010] Specific implementation mode 1: In this embodiment, the method of using high-calcium graphite dressing tailings sand as a filler to make gangue porous bricks is carried out in the following steps: 1. The high-calcium graphite dressing tailings sand, high-silicon gangue and shale gangue are used according to the mass percentage. Mix and grind until the particle size of more than 65% is not greater than 0.5mm, add water until the water content is 15%-17%, and perform a stirring; 2. Aging the product after the first stirring in the aging warehouse for at least 72 hours, add water to the water content 14%-16%, the second stirring; third, the product after the second stirring is sent to the mixing extruder, and water is added until the water content is 16%, and the third stirring is carried out; the fourth and third stirring products are extruded in a vacuum Vacuum forming in the brick machine; 5. Stacked blanks, dried in a drying kiln until the water content is less than 5%,...

specific Embodiment approach 2

[0016] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the high-calcium graphite beneficiation tailings sand described in step one accounts for 30% of the total mass of the mixture, the high-silicon gangue accounts for 35% of the total mass of the mixture, and the shale Gangue accounts for 35% of the total mass of the mixture. Others are the same as the first embodiment.

specific Embodiment approach 3

[0017] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the content of CaO in the high-calcium graphite beneficiation tailings sand is 11%, the content of MgO is 2%; the content of silicon in the high-silicon gangue is 40% . Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing coal gangue perforated brick by taking high-calcium graphite milltailing sand as filler, relating to a preparation method of wall material, in particular to a preparation method of perforated brick. The invention solves the problem that graphite tailing can not be used for producing the wall material because of high content of CaO and extra low plasticity and providing a preparation method of perforated brick. The preparation method is as follows: 1, mixing, smashing and stirring raw materials; 2, aging and stirring; 3, transmitting and stirring; 4, forming in vacuum; and 5, setting, drying, sintering and cooling to obtain the perforated brick. The method of the invention utilizes abandoned graphite milltailing sand to serve as raw material, and the prepared perforated brick resists acid and alkali erosion, resists weathering, has high strength and is applied to the field of building.

Description

technical field [0001] The invention relates to a preparation method of a wall material, in particular to a preparation method of a porous brick. Background technique [0002] Tailings sand is one of the products of sorting operations in mineral processing. The content of the target components is the lowest. It is often piled up on land as a waste, resulting in the barrenness of a lot of fertile land, and it is easy to generate sand and seriously pollute the environment. Mashan District, Jixi City, Heilongjiang Province is rich in graphite resources. Graphite concentrators excrete nearly 200,000 tons of tailings sand every year, which piles up like a mountain of waste and brings many hazards to people's lives. Graphite beneficiation tailings have high CaO content, poor plasticity, and cannot be molded by themselves. Therefore, there is no report of using it to produce wall materials. Contents of the invention [0003] The present invention aims to solve the current proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00B09B3/00
Inventor 安玉强
Owner 黑龙江奥宇石墨集团有限公司
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