Energy-saving heat retaining rectangular-hole porous brick

Abstract

The invention discloses an energy-saving heat retaining rectangular-hole porous brick, prepared through the following steps of: 1) charging coal gangue into a hopper and conveying the same to a raw material processing workshop through a belt conveyor, and then crashing the coal gangue by a hammer mill and screening the same by a rotary screen or a vibrating screen to form coal gangue powder; 2) feeding the coal gangue powder together with building wastes, slags, sludge and water to perform primary stirring and then feeding the mixture to an aging chamber for aging; 3) conveying the aged material to perform secondary stirring and producing green bricks in a vacuum brickmaking machine by the belt conveyor; 4) stacking the green bricks on a kiln car by a hydraulic automatic setting machine and then feeding the green bricks into a drying cavity for drying; and 5) conveying the dried green bricks to the opening of a tunnel kiln by a ferry vehicle and then lifting the green bricks in the kiln for sintering, thereby obtaining finished products of bricks, wherein the bricks comprise the following raw materials by weight percent: coal gangue powder 70-80%, building wastes 5-10%, slags 8-13%, sludge 2-6%, and the balance of water. The energy-saving heat retaining rectangular-hole porous brick is high in strength, high in voidage, low in dead load, good in sound isolation and excellent in heat retaining performance.

Description

technical field

[0001] The invention relates to a brick, in particular to an energy-saving and heat-retaining brick with rectangular holes. Background technique

[0002] Rectangular hole perforated bricks (over 30% void rate) and rectangular hole hollow bricks (over 40% void rate) are a major product of new wall materials, and are wall materials encouraged by the state.

[0003] The current single coal gangue or silt raw materials for making bricks cannot fully meet the brick-making requirements in terms of calorific value. From the perspective of chemical composition, the physical and chemical properties of individual raw materials are not good enough. Among them, AI 2 o 3 、sio 2 Content also does not reach optimal index.

[0004] At the same time, affected by the existing sintering process, the strength of the product is not high enough, the void rate is not large enough, the self-weight is not light enough, and the thermal insulation performance is not ideal enough. ...

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