Fly ash thermal-insulation sintered material and production technique thereof

A technology for thermal insulation sintering and fly ash, which is applied in the field of fly ash thermal insulation sintering material and its production process, can solve problems such as difficulty in defining, no green body strength data, and difficulty in judging whether the green body is not damaged, etc.

Inactive Publication Date: 2010-12-08
翁履谦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent application CN1075310 proposes to mix "sticky" and non-sticky fly ash for molding, but there is no generally accepted definition of "sticky" fly ash, so it is difficult to define
None of the patent applications cited above have data on the strength of the green body, and it is difficult to judge whether the green body has sufficient strength so that it will not be damaged in subsequent handling or palletizing

Method used

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  • Fly ash thermal-insulation sintered material and production technique thereof
  • Fly ash thermal-insulation sintered material and production technique thereof
  • Fly ash thermal-insulation sintered material and production technique thereof

Examples

Experimental program
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Embodiment approach 1

[0010] Embodiment one: get the fly ash that is 90% by weight ratio, 2% solid sodium hydroxide and 8% sodium silicate water glass (modulus is 2.3), produce according to following process:

[0011] 1. Dissolve solid sodium hydroxide in water, and add sodium silicate solution in proportion. The total weight of water, sodium silicate solution and sodium hydroxide is 15% of the amount of fly ash;

[0012] 2. The aqueous solution prepared in step 1 and the fly ash are stirred evenly to form a billet;

[0013] 3. Press the blank obtained in step 2 into a compact;

[0014] 4. Dry the green body at 120°C;

[0015] 5. The dried blocks are sintered in the kiln. The sintering temperature is 1000°C.

[0016] 6. The product leaves the kiln

[0017] After drying, the compressive strength of the green body is 16.1MPa.

[0018] Product performance after leaving the kiln: compressive strength 31.6MPa; thermal conductivity 0.46W / m.K.

[0019] It can be seen from the performance of the pro...

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Abstract

The invention discloses a fly ash thermal-insulation sintered material and a production technique thereof, and belongs to the fields of construction materials and production techniques. Aiming at the problem that the fly ash thermal-insulation material can not easily obtain high green strength and can not be easily sintered, the invention provides the fly ash thermal-insulation sintered material. The fly ash thermal-insulation sintered material comprises the following raw materials in percentage by weight: 30-99% of fly ash, 1-40% of curing excitant, 0-40% of light-weight aggregate and 0-69% of other solid raw materials. The production technique of the fly ash thermal-insulation sintered material comprises the following steps: evenly stirring fly ash, curing excitant, light-weight aggregate and other solid raw materials; evenly mixing the mixture with water to obtain the green compact; molding the green compact; after molding, drying the green compact in an oven, or naturally drying at room temperature; and sintering the dried green compact at 800-1100 DEG C. The fly ash thermal-insulation sintered material has the advantages of high green strength, high sintering strength and favorable thermal insulation property. The production technique is suitable for mass production.

Description

technical field [0001] The invention relates to a fly ash thermal insulation sintering material and a production process thereof. Background technique [0002] Fly ash is a fine powder with pozzolanic activity after the coal powder in thermal power plants is burned. It is one of the largest industrial solid wastes. Fly ash accumulates a large amount and occupies a large area, polluting the environment. Harmful substances in fly ash are not easy to destroy and attenuate, and their hazards are long-term and potential. The chemical composition and content of fly ash vary depending on the origin, combustion method and degree of combustion of the coal. It can be roughly divided into two categories: low-calcium and high-calcium fly ash, but some fly ash contains high sulfur, high carbon, Components such as high-speed rail. Fly ash particles vary in size and shape, and can be divided into bead-like particles and slag-like particles according to their shapes. According to diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 翁履谦
Owner 翁履谦
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