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Heat-preservation and energy-saving bricks made from Taihu silt and preparation method for bricks

An energy-saving brick and silt technology, applied in the field of building materials, can solve the problems of large shrinkage, side curvature, and large shrinkage deformation of Taihu mud, and achieve the effects of reducing production costs, high organic content, and large plastic index.

Inactive Publication Date: 2015-11-04
宜兴市浦发陶瓷厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the large amount of organic matter and impurities in the silt, it is produced with pure Taihu mud, which is prone to black spots after firing. In severe cases, it will cause bubbling on the surface of the product or the formation of holes inside; 2. Due to the existing firing system, it is easy to appear Poor oxidation during firing; 3. Taihu mud shrinks greatly, shrinks and deforms relatively large, making long and narrow bricks is prone to side curvature
The above problems have long plagued the use of Taihu Lake sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1), the Taihu silt extracted from Taihu Lake is filtered and dehydrated by a vibrating screen to obtain a semi-finished product with a moisture content of 35%, and then dried to obtain a mud block with a moisture content of 10%, and finally broken into 100 mesh mud powder;

[0026] 2), by weight percentage, weigh the following component raw materials: 35% Taihu silt, 15% illite (80 orders), 5% kaolin (80 orders), 10% waste clinker (60 orders), 10% quartz (60 mesh), 15% feldspar (30mm), 4% interface agent, 6% water, kneaded into a uniform mud bar by wheel rolling;

[0027] 3), using a vacuum extrusion molding machine to vacuum extrude to obtain a wet billet, the molding pressure is 2.4MPa, and the molding pressure time is 3 seconds; the wet billet enters the drying room and is dried at 110°C for 4 hours to obtain a dry billet;

[0028] 4) Send the above-mentioned dry green body into the kiln and burn it at a firing temperature of 1150°C for 8 hours to obtain a finished t...

Embodiment 2

[0030] 1), the Taihu silt extracted from Taihu Lake is filtered and dehydrated by a vibrating screen to obtain a semi-finished product with a moisture content of 30%, and then dried to obtain a mud block with a moisture content of 8%, and finally broken into 100 mesh mud powder;

[0031] 2), by weight percentage, weigh the following component raw materials: 28% Taihu silt, 12% illite (100 orders), 15% kaolin (100 orders), 15% waste clinker (40 orders), 5% quartz (40 mesh), 18% feldspar (32mm), 2% binder, 5% water, kneaded into a uniform mud bar by wheel rolling;

[0032] 3), using a vacuum extrusion molding machine to vacuum extrude to obtain a wet billet, the molding pressure is 3.0 MPa, and the molding pressure time is 4 seconds; the wet billet enters the drying room and is dried at 120 ° C for 4 hours to obtain a dry billet;

[0033] 4) Burn the above-mentioned dry green body at a firing temperature of 1180°C for 12 hours to obtain a finished thermal insulation and energy-s...

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Abstract

The invention discloses heat-preservation and energy-saving bricks made from Taihu silt. The bricks comprise the following raw materials in percentage by weight: 25 to 45 percent of Taihu silt, 1 to 20 percent of illite, 1 to 15 percent of kaolin, 10 to 20 percent of waste clinker, 1 to 10 percent of quartz, 5 to 20 percent of feldspar, 1 to 5 percent of a dry-blend and 3 to 8 percent of water. The preparation method for the heat-preservation and energy-saving bricks comprises the following steps of preparing the Taihu silt; weighing the raw materials in percentage by weight, and rolling and kneading the raw materials into uniform clay strips; performing vacuum extrusion forming to obtain wet blanks, wherein the forming pressure is 2.0 to 4.0MPa; drying the wet blanks for 2 to 4 hours at 100 to 200 DEG C to obtain dried blank bodies; firing the dried blank bodies for 3 to 20 hours at firing temperature of 1,000 to 1,200 DEG C to obtain heat-preservation and energy-saving brick finished products. According to the heat-preservation and energy-saving bricks, the Taihu silt is effectively cleaned and stacked, and the fired products have the characteristics of heat preservation, waterproofness, shock resistance, durability and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a thermal insulation and energy-saving brick made of Taihu Lake silt and a preparation method thereof. Background technique [0002] In May 2007, a large-scale outbreak of cyanobacteria in Taihu Lake caused a drinking water crisis in Wuxi. Experts in bill protection pointed out that Taihu Lake silt not only has peculiar smell, but also is rich in organic matter, which is a breeding ground for blue-green algae. Only comprehensive dredging can fundamentally improve the water environment. However, the disposal of the cleaned up sludge is another thorny issue. How to turn waste into treasure and make the discarded silt a usable backup resource, the Provincial Department of Construction regards it as a key topic to organize research. [0003] According to estimates, 500,000 to 6.7 million cubic meters of Taihu Lake silt are cleared around Taihu Lake in Yixing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132
CPCY02P40/60
Inventor 许锋
Owner 宜兴市浦发陶瓷厂
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