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Method for preparing ceramic water permeable brick from refractory clay tailings as raw material

A technology of refractory clay and permeable bricks, which is applied in the production and application of clay products and ceramic materials. It can solve problems such as failure to meet the use standards of refractory materials, pollution of water and land resources, and occupation of land resources. It achieves high strength and protection. Can actively reduce the effect of tailings accumulation

Inactive Publication Date: 2017-01-18
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high content of impurities such as iron oxide, potassium oxide, and sodium oxide, refractory clay tailings cannot meet the standards for the use of refractory materials. In the ceramic industry, they can only be used as ceramic raw materials. The utilization rate is very low, and most of them are discarded. , the annual accumulation of millions of tons has caused a great waste of resources
At the same time, the existence of a large number of tailings not only occupies a large amount of land resources, but also pollutes water and land resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Mix 75wt% of high alumina clay tailings, 10wt% of quartz and 15wt% of feldspar according to the weight ratio, add water and grinding balls, and finely grind in a drum mill for 3 hours to obtain a mixed mud;

[0018] 2) After drying, granulating, and pressing the prepared mixed mud, it is placed in a tunnel kiln or roller kiln, and sintered at 1200 to 1250°C for 1 hour to obtain high-density alumino-silicon ceramics;

[0019] 3) Crushing, sieving, and classifying the prepared aluminum-silica ceramics to obtain ceramic aggregates of different particle sizes; the particle size composition of the ceramic aggregates is: 3-10 meshes, 50-55% by weight, 10-14 meshes 15-20 wt%, 18-200 mesh, 25-30 wt% ceramic aggregate;

[0020] 4) Stir 95wt% of ceramic aggregate and 5wt% of sodium silicate as additives, shape at 20~30MPa, dry at 80~120℃ for 3 hours, and then fire at 1150~1200℃ for 1 hour. , Get ceramic permeable bricks.

[0021] The ceramic permeable brick prepared in this example h...

Embodiment 2

[0023] 1) Mix 85% by weight of hard clay tailings, 7% by weight of quartz and 8% by weight of waste glass powder according to the weight ratio, add water and grind in a drum mill for 3 to 5 hours to obtain a mixed slurry;

[0024] 2) The prepared mixed mud is granulated, pressed into shape, dried, put into a tunnel kiln or roller kiln, and kept at 1150~1200℃ for 1~2 hours to obtain high-density aluminum-silicon ceramics. Obtain high-density aluminum silicon ceramics;

[0025] 3) Crushing, sieving, and classifying the prepared aluminum-silica ceramics to obtain ceramic aggregates with different particle sizes; the particle size composition of the ceramic aggregates is: 3-10 meshes for 40-45% by weight, and 10-14 meshes for 20-25wt%, 18-200 mesh, 30-35wt% ceramic aggregate;

[0026] 4) Stir uniformly the 90wt% and 10wt% additives of the prepared ceramic aggregates with different particle sizes, shape them at 20-30MPa, dry at 80-120℃ for 3 hours, and then keep them at 1130-1180℃ for 1 ...

Embodiment 3

[0029] 1) Mix 80wt% of soft clay tailings, 8wt% of quartz and 12wt% of feldspar according to the weight ratio, add water and finely grind in a drum mill for 3 hours to obtain a mixed mud;

[0030] 2) The prepared mixed mud is granulated, pressed, molded, dried, put into a tunnel kiln or roller kiln, and sintered at 1180°C for 1 to 2 hours to obtain high-strength alumino-silicon ceramics;

[0031] 3) Crushing, sieving and classifying the prepared aluminosilicate ceramics to obtain ceramic aggregates of different particle sizes; the particle size composition of the ceramic aggregates is: 3-10 meshes, 40-45% by weight, 10-14 meshes Ceramic aggregate of 20-25wt%, 18-200 mesh, 30-35wt%;

[0032] 4) Mix 88wt% of ceramic aggregate and 12wt% of additives uniformly, shape them at 20-30MPa, dry at 80-120°C for 3 hours, and then fire at 1100-1150°C for 1 to 2 hours. Obtain ceramic permeable bricks; the added amount of the additives is 4wt% water and 8% clay;

[0033] The ceramic permeable brick...

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PUM

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Abstract

The invention relates to a method for preparing a ceramic water permeable brick from refractory clay tailings as a raw material. The method is characterized in that the refractory clay tailings are adopted as a main raw material. The method comprises the following steps: 1) mixing 75-90wt% of the refractory clay tailings, 1-10wt% of quartz and 5-20wt% of a solvent according to a ratio, and performing wet-method fine grinding so as to obtain a mixed mud material; 2) drying, pelleting, molding and sintering the mixed mud material so as to obtain high-strength aluminosilicate ceramic; 3) crushing, screening and grading the prepared ceramic so as to obtain ceramic aggregate; 4) uniformly stirring 85-95wt% of the ceramic aggregate with 5-15wt% of a binding agent, molding and drying, and sintering at 1100-1200 DEG C, thereby obtaining the ceramic water permeable brick. By adopting the method, direct recycling and utilization of the refractory clay tailings can be achieved, and meanwhile the ceramic water permeable brick which is high in strength and good in water permeability can be made, so that the requirements of circular economy development can be met, and a very positive effects on ecological environment protection can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and specifically relates to a ceramic permeable brick using refractory clay tailings as raw materials and a preparation method thereof. Background technique [0002] In recent years, my country’s cities have faced prominent problems such as high flood discharge pressure, frequent waterlogging disasters, and serious loss of rainwater resources, which have led to the decline of urban groundwater levels, urban waterlogging, and urban heat islands. The urban natural ecology is facing serious imbalances. For this reason, our country puts forward the concept of building a "sponge city" with the purpose of improving the hydrological and ecological environment of urban roads and enhancing the "respiratory function" of the urban environment. Ceramic permeable bricks have the characteristics of high strength and good water permeability, which can effectively solve the problem of water p...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/16C04B33/13
CPCC04B33/1305C04B33/131C04B33/132C04B33/1321C04B33/16C04B2235/3208C04B2235/3418C04B2235/3427C04B2235/3463C04B2235/442C04B2235/96Y02P40/60
Inventor 赵飞马成良王淑玲胡晓丽孙洪巍殷武震任海杰史幸福
Owner ZHENGZHOU UNIV
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