Coal gangue sintered brick and preparation method therefor

Abstract

The present invention discloses a coal gangue sintered brick. The coal gangue sintered brick consists of the following components in proportion by weight: 70-75% of coal gangue; 10-15% of emulsion waste oil; 2-5% of silica fume or cement; and 10-13% of water. The present invention further discloses a method for preparing the coal gangue sintered brick. The method comprises the following steps of: preliminary crushing, smashing, screening, mixing, stirring, aging, secondarily stirring, carrying out vacuum extruding, slitting, carrying out brick-body molding, drying, sintering, and cooling. According to the coal gangue sintered brick and the preparation method therefor disclosed by the invention, the coal gangue and the emulsion waste oil are used as main raw materials for brick preparation, so that not only can cultivated lands and land resources be saved, but also damages to vegetation and river environment can be avoided; and produced bricks have good plasticity, better bearing capability, good water permeability, andare energy-saving and environmentally-friendly.

Description

technical field [0001] The invention belongs to the technical field of preparing or processing raw materials separately or as batch materials, and in particular relates to a coal gangue sintered brick and a preparation method thereof. Background technique [0002] The traditional brick-making technology in our country is to use clay to sinter bricks, which requires a large amount of farmland mining, causing farmland damage, so many companies have begun to use other materials to replace or partially replace clay, such as fly ash or coal gangue in industrial waste, etc. , the development of the country's industry has led to a sharp increase in the discharge of industrial waste, which not only occupies a large amount of space, but also pollutes the environment. Brick enterprises began to use fly ash, coal gangue, etc. to produce sintered bricks. In addition, the rise of real estate not only required a large amount of construction waste during demolition, but also produced a lar...

AI Technical Summary

Problems solved by technology

[0002] The traditional brick-making technology in our country is to use clay to sinter bricks, which requires a large amount of farmland mining, causing farmland damage, so many companies have begun to use other materials to replace or partially replace clay, such as fly ash or coal gangue in industrial waste, etc. , the development of the country's industry has led to a sharp increase in the discharge of industrial waste, which not only occupies a large amount of space, but also pollutes the environment. Brick enterprises began to use fly ash, coal gangue, etc. to produce sintered bricks. In addition, the rise of real estate not only required a large amount of construction waste during demolition, but also produced a large amount of earthwork when digging foundations. There are a lot of construction waste and earthwork Sometimes it is used to dump garbage dumps or river banks or riversides, occupying a large amount of land resources and destroying vegetation and river environments. In addition, as a country with a large steel output, the emulsion waste oil leachate on the cold rolling production line is an important tool for pollution control. The big problem is that the emulsion waste oil leach contains a large amount of iron powder, emulsion components, hydraulic oil components and engine oil components. The existing emulsion waste oil leachate is used for landfill and sun-dried road paving, etc., which not only wastes land, but also wastes resource