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

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...

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 materials in holes, Improve the thermal insulation performance of coal gangue sintered bricks, and the heat transfer coefficient of brick wall masonry has reached 1.185W / (m 2 K), the thermal conductivity has reached 0.377W / (m K), although it has a certain thermal insulation effect, it still cannot meet the requirements of building energy saving of more than 50%, and the production process is complicated and the fire resistance is poor