A micropore composite fired brick tackified and modified with acrylic acid

Abstract

A micropore composite fired brick tackified and modified with acrylic acid is disclosed. The micropore composite fired brick is prepared from, by weight, 40-43 parts of municipal sludge, 8-9 parts of mesoporous silica, 22-25 parts of shale, 38-40 parts of gangue, 14-15 parts of rice hull, a proper amount of water, 6-7 parts of nepheline tailings, 7-9 parts of bamboo charcoal, 3-4 parts of acrylic acid, 2-3 parts of borax and 5-6 parts of hilly loess. The nepheline tailings and the hilly loess are compounded with the acrylic acid through a series of processes, thus playing a role of a filling material and increasing viscosity of mixed mud materials. Through mixing with other raw materials, the water content of a brick blank is increased obviously and the ratio of briquetting of brick blanks is increased. The fired brick is compact in appearance, comprises micropores inside, and is good in thermal insulation effects, good in toughness, high in strength and not liable to break. The raw materials are simple and easily available. A process is convenient in industrial control and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of sintered bricks, in particular to a microporous composite sintered brick modified by viscosity increasing of acrylic acid. Background technique [0002] As the third largest country in the world, China has abundant clay resources. However, with the increasing population of our country and the further development of the construction industry, the contradiction of relatively insufficient land resources in our country has become increasingly prominent. According to statistics, my country's per capita The area of ​​arable land is less than 43% of the world average level, so we are facing the heavy pressure of insufficient land resources. In order to solve the problem of insufficient arable land per capita, clay solid bricks are gradually banned and eliminated, and coal gangue and shale will become As the main raw material for sintered bricks, coal gangue is widely used to make bricks in most mining areas of the...

AI Technical Summary

Problems solved by technology

However, due to the use of rice husk as a porogen, a large amount of water is lost during the sintering process of the brick body, forming larger pores, and the pores are continuously compressed during the densification process, and the firing shrinkage increases. During the firing process, with the continuous escape of water and volatile matter, larger voids are formed in the body, and interpenetrating pores are continuously formed during the outward migration of volatile matter, resulting in its In the case of the same porosity, the water absorption rate is high, and the impermeability decreases, which requires modification; the present invention adds dried sludge as the main component of fired bricks, although the water content of the dried sludge is already very low , but the drying of sludge is a process of water evaporation, and the hydrogen sulfide and ammonia molecules in the raw materials will also evaporate, which will cause odor pollution to the factory and the surrounding environment, and have a serious impact on people's work and daily life