Brick making method

Abstract

The invention relates to a brick making method which comprises the following steps: (1) smashing and mixing the following raw materials in parts by volume to prepare a brick making raw material: 30 to 40 parts of a waste building material, 20 to 30 parts of shale, 10 to 15 parts of coal cinder and 50 to 80 parts of clay; (2) adding water into the brick making raw material, stirring to prepare pug, and then aging for 2 days or longer; (3) preparing a green brick from the pug through a vacuum brick extruding machine; (4) roasting the green brick under a condition that the vacuum degree is less than 0.1 at the roasting temperature of 700 to 800 DEG C to obtain a finished brick. The method goes green and is environmentally-friendly and high in brick making efficiency.

Description

technical field [0001] The present invention relates to a brick making method. Background technique [0002] At present, the treatment of a large amount of domestic sewage in urban filling - the sludge with a water content of 60-85% (including crystal water) after the sedimentation sludge is pressed, filtered and pre-dehydrated is strictly prohibited by local governments because it contains harmful substances such as heavy metals. On-site landfill, although chemically dehydrated and then burned in a furnace or disposed of by a cement factory, the amount of digestion is far from meeting the amount of production. [0003] The sludge of domestic sewage treatment plants is full of 80% water, and most of them are crystalline water bodies that are difficult to evaporate even if they are exposed to the sun. In order to reduce the water content of sludge from urban domestic sewage plants (even if the water content is reduced to 80% to 60%), the investment of energy and funds requir...

AI Technical Summary

Problems solved by technology

[0002] At present, the treatment of a large amount of domestic sewage in urban filling - the sludge with a water content of 60-85% (including crystal water) after the sedimentation sludge is pressed, filtered and pre-dehydrated is strictly prohibited by local governments because it contains harmful substances such as heavy metals. Landfill on site, although it is dehydrated by chemical method and then incinerated or disposed of by cement factory, but the amount of digestion is far from meeting the amount of production

[0003] The sludge of domestic sewage treatment plants is full of 80% water, and most of them are crystalline water bodies that are difficult to evaporate even if they are exposed to the sun. In order to reduce the water content of sludge from urban domestic sewage plants (even if the water content is reduced to 80% to 60%), the investment in energy and funds required is seriously outweighed by the gains, and secondary pollution is also inevitable