Method for producing self-insulation baked brick by using pure coal gangue

A technology of coal gangue and sintered bricks, which is applied in the field of producing self-insulating sintered bricks using pure coal gangue, which can solve the problems of low compressive strength, low thermal insulation performance, and high apparent density, and achieve particle size reduction and control of lime bursting. , Improve the effect of plasticity index

Inactive Publication Date: 2010-03-17
沈正
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching the existing technical documents, it is found that the Chinese invention patent CN1311087 discloses "A Method for Making Bricks from Coal Gangue". Low porosity, large apparent density, low compressive strength, and low thermal insulation performance; Chinese patent CN101429007A discloses another "Method for Making Coal Gangue Sintered Bricks", which adopts measures such as plugging composite insulation mater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1:

[0019] The method of using coal gangue to produce self-heating sintered bricks is expressed in weight percentage: 70% of coal gangue with a plasticity index of 14.6 is mixed uniformly, and then subjected to aging, stirring, extrusion molding, drying and roasting.

[0020] 1. First, use the jaw crusher to coarsely crush the coal gangue raw materials, then use the hammer crusher to finely crush the coal gangue raw materials, and finally carry out particle screening treatment with the trommel screen, and the particle size of the obtained raw materials is below 3mm, of which 0.5mm The following particles are larger than 60%, then add 4% coal powder, 20% coal slag and 6% wood chips to stir evenly, and finally add water and stir, and the moisture content of the material after adding water and stirring is controlled at 5-10%;

[0021] 2. The stirred raw materials are sent to the aging warehouse for aging treatment, and the raw materials are evenly distributed in t...

Example Embodiment

[0027] Example 2:

[0028] The method of using coal gangue to produce self-heating sintered bricks has the following specific process steps: mixing 75% coal gangue, 3% coal powder, 15% fly ash and 9% wood chips with a plastic index of 14.0, and then mixing them evenly. , stirring, extrusion molding, drying, roasting.

[0029] The process parameters are as follows: the particle size of the raw material is below 3mm, of which the particle size below 0.5mm is preferably greater than 60%, the particle size of wood chips is 0.5mm, the moisture content is 14%, the drying temperature is 90 ° C, drying for 1 day, the roasting temperature is 1080 ° C, and the roasting temperature is 1080 ° C for 1 day. sky.

Example Embodiment

[0030] Example 3:

[0031] The method of using coal gangue to produce self-heating sintered bricks has the following process steps: 80% coal gangue, 5% coal powder, 12% fly ash and 11% wood chips with a plastic index of 14.4 are mixed uniformly, and then aged. , stirring, extrusion molding, drying, roasting.

[0032] The process parameters are as follows: the particle size of the raw material is below 3mm, of which the particles below 0.5mm are preferably greater than 60%, the particle size of the wood chips is 0.5mm, the moisture content is 13%, the drying temperature is 80°C, drying for 1.5 days, the roasting temperature is 1100°C, and the roasting temperature is 1100°C for 1.5 days. sky.

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Abstract

The invention relates to a method for producing self-insulation baked bricks by using pure coal gangue, comprising the following components in weight percent: 65-85 coal gangue, 2-10 coal dust, 10-25coal residue or fly ash and 3-15 pore forming agent. The method comprises the following processing steps: firstly crushing raw materials in particles with particle size being less than 3mm, wherein particles less than 0.5mm accounts for more than 60%; adding water of hole forming agents such as sawdust, rice hulls or straw and the like and evenly stirring; and obtaining finished products by aging,rolling and refining, extrusion molding, drying and roasting. The invention has the advantages of comprehensively using raw materials such as coal gangue, fly ash, sawdust and the like which are absolute waste in industry and agriculture, thus having important realistic significance in protecting environment and plowland, using the processes of jaw crushing, hammer crushing and screening to further lower the particle size of the coal gangue raw material, thus being favor of improving the plasticity indexes of raw materials and controlling lime bloating phenomenon, and has the effects of lightweight, heat preservation, heat insulation and sound insulation, thus completely satisfying the requirement of saving 50% of energy for buildings.

Description

technical field [0001] The invention relates to a production method of building materials, in particular to a method for producing self-insulating sintered bricks by using coal gangue. Background technique [0002] With the accelerated development of urban construction and the gradual advancement of new rural construction, the demand for various building materials is also increasing day by day. Traditional building material products such as cement concrete and clay bricks have played an important role, but as the country has increasingly stringent requirements for building energy conservation and environmental protection, traditional building material products have been unable to meet the requirements for use. Energy-saving and waste-recycling new wall materials for thermal insulation have achieved rapid development. New energy-saving wall materials such as lightweight thermal insulation blocks or porous thermal insulation bricks have been more and more widely used in variou...

Claims

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Application Information

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IPC IPC(8): E04C1/00C04B38/06
Inventor 沈正王新荣殷文束光辉奚彩云
Owner 沈正
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