Coal gangue and shale hollow brick with excellent frost resistance and manufacturing method thereof

Abstract

The invention discloses a coal gangue and shale hollow brick with excellent frost resistance. The coal gangue and shale hollow brick with excellent frost resistance is characterized by being prepared from the following raw materials in parts by weight: 70-73 parts of mixed powder of treated coal gangue and shale, 50-54 parts of pulverized fuel ash, 9-11 parts of saw dust, 4-6 parts of red mud, 3-5 parts of sodium sulfate, 2-3 parts of sodium chloride, 4-6 parts of spent pulping liquor and 9-10 parts of water. Compared with the prior art, the coal gangue and shale hollow brick disclosed by the invention has the advantage that the components are matched scientifically and reasonably; due to the addition of the mixed powder of treated coal gangue and shale and the ball-milled pulverized fuel ash, the plasticity index of the coal gangue and shale hollow brick is increased, the cohesiveness of particles is improved, and the adobe is compact, is low in water absorption rate and cracks less in the drying process; due to the addedsodium chloride, the frost resistance of the coal gangue and shale hollow brick is improved; due to the matched components, the coal gangue and shale hollow brick can be baked easily to have high cohesional strength and good frost resistance; and because the saw dust is burnt away in the baking process, the coal gangue and shale hollow brick is light in weight.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a coal gangue shale hollow brick with excellent frost resistance and a preparation method thereof. Background technique [0002] Coal gangue is one of the largest industrial solid wastes in China. Moreover, the annual discharge of coal gangue is equivalent to about 10% of the coal production in that year. The annual emission rate will be greater than 160 million tons. Stacking coal gangue not only takes up a lot of land, but also pollutes the environment and affects people's life and health. In addition, the spontaneous combustion of coal gangue can release a variety of harmful gases, etc., and at the same time it is accompanied by a large amount of smoke and dust and has the risk of explosion. Therefore, the spontaneous combustion of coal gangue has different degrees of impact on the surrounding atmospheric environment, human health, animal and plant growth, etc. Fly ash is...

AI Technical Summary

Problems solved by technology

If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause river silting, and the toxic chemicals in it will also cause harm to humans and organisms