Thermal-decomposing pore-forming self-heat-insulating bearing sintered product and preparation method thereof

A technology of sintered products and thermal decomposition, which is applied in the direction of ceramic products, clay preparation devices, chemical instruments and methods, etc., can solve the problems of high heat transfer, difficult construction, small cavities, etc., so as to save land resources and achieve good thermal insulation effect , the effect of high porosity

Inactive Publication Date: 2010-02-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the existing sintered porous bricks have complex hole patterns and high porosity, which can effectively save materials, but the holes are small, which will bring some difficulties in construction. After the sintered porous bricks are used as a wall, the heat will flow on the thermal bridge. The propagation is more obvious, so that the actual heat transfer is higher than the theoretical simulation

Method used

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  • Thermal-decomposing pore-forming self-heat-insulating bearing sintered product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: three kinds of raw materials that tailings, sodium soil, calcium oxalate mass ratio are 50: 45: 5 are stirred evenly (the particle diameter of tailings, sodium soil is less than 0.15mm, and the particle diameter of calcium oxalate is less than 0.075mm), Add a small amount of water to granulate, age for 1 to 3 days, and after obtaining suitable plasticity, make the mud material be molded into attached bricks in a vacuum extruder through a porous brick mold. figure 1 The green body of mesopore type and size is then dried at a temperature of 50±5°C for 2 to 4 days, and fired at 1070±20°C for 5 hours to obtain a heat transfer coefficient of 0.441W / m2·°C. The compressive strength is 24.3MPa, the apparent density is 1.56g / cm3, and other indicators also meet the requirements of GB13544-2000 and GB6566-2001. It is a self-insulating load-bearing sintered product.

Embodiment 2

[0024] Embodiment 2: three kinds of raw materials that coal gangue, sodium soil, basic magnesium carbonate mass ratio are 60: 30: 10 are stirred evenly (the particle diameter of coal gangue, sodium soil is less than 0.15mm, and the particle diameter of basic magnesium carbonate is less than 0.075mm), adding a small amount of water to granulate, aging for 1 to 3 days, and after obtaining suitable plasticity, the mud is formed into attached bricks in a vacuum extruder through a porous brick mold. figure 1 The green body with mesopore type and size is then dried at a temperature of 50±5°C for 2 to 4 days, and fired at 1070±20°C for 6 hours to obtain a heat transfer coefficient of 0.425W / m2·°C. The compressive strength is 23.1MPa, the apparent density is 1.47g / cm3, and other indicators also meet the requirements of GB13544-2000 and GB6566-2001. It is a self-insulating load-bearing sintered product.

Embodiment 3

[0025] Embodiment 3: the four kinds of raw materials that coal gangue, shale, double fly powder, dolomite mass ratio are 36:54:5:5 are stirred evenly (the particle diameter of coal gangue, shale is less than 0.15mm, double fly powder, dolomite The particle size is less than 0.075mm), add a small amount of water to granulate, and age for 1 to 3 days. After obtaining suitable plasticity, the mud is formed into an attached brick through a porous brick mold in a vacuum extruder. figure 1 The green body with mesopore type and size is then dried at a temperature of 50±5°C for 2 to 4 days, and fired at 1050±20°C for 6 hours to obtain a heat transfer coefficient of 0.402W / m2·°C. The compressive strength is 21.2MPa, the apparent density is 1.43g / cm3, and the other indicators also meet the requirements of GB13544-2000 and GB6566-2001. It is a self-insulating load-bearing sintered product.

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Abstract

The invention relates to a thermal-decomposing pore-forming self-heat-insulating bearing sintered product and a preparation method thereof. The thermal decomposing pore-forming self-heat-insulating bearing sintered product mainly comprises the following raw materials of powder solid waste, a binder and a thermal-decomposing pore-forming agent in a mass ratio of 1: (0.5-1.5): (0.1-0.4), wherein thepowder solid waste adopts one of fly ash, coal gangue and tailings; the binder adopts shale or sodium soil; and the thermal-decomposing pore-forming agent adopts one salt or a mixture of calcium oxalate, basic magnesium carbonate, powdered whiting and dolomite which can be decomposed to discharge a great amount of gases at 500-900 DEG C. The preparation method comprises the following steps: adding water to granulate; aging for 1-3 days; forming blank blocks by a porous block mold in a vacuum extruder; drying at a temperature of 45-55 DEG C for 2-4 days; and sintering at 1000-1100 DEG C for 5-8 hours before cooling. The invention has the advantages of solid waste utilization, soil saving, good heat-insulating effect, convenient and rapid construction, and the like.

Description

technical field [0001] The invention relates to porous bricks, which belong to the field of new wall materials, in particular to a thermal decomposition pore-forming self-insulation load-bearing sintered product and a preparation method thereof. Background technique [0002] At present, my country's economy is developing rapidly, but various resources such as coal and oil are becoming increasingly scarce, and air pollution and water pollution are becoming more and more serious. Saving resources and protecting the environment have become one of my country's basic national policies. Especially since the beginning of the 21st century, with the further improvement of people's living standards, the demand for housing has further increased. The cities and towns in the country need about 2 billion square meters of housing every year. However, most of the buildings in our country used clay bricks as the main material in the past. structural system. The annual excavation of clay bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C1/00B28C7/04B28B3/20C04B38/00C04B28/00C04B18/08C04B18/12
CPCY02W30/91
Inventor 马保国袁龙蹇守卫穆松王耀城黄祥吕阳
Owner WUHAN UNIV OF TECH
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