Light-weight high-temperature mullite refractory brick prepared from pulverized fuel ash

Abstract

The invention discloses a light-weight high-temperature mullite refractory brick prepared from pulverized fuel ash. The light-weight high-temperature mullite refractory brick comprises the following raw materials: 40-50% of pulverized fuel ash, 25-35% of clay, 10-20% of aluminite powder, 7-8% of coal gangue, 1-2% of polystyrene, and 0.5-1.5% of saw dust. The light-weight high-temperature mullite refractory brick is prepared through the following steps: (1) weighing pulverized fuel ash, clay, aluminite powder, coal gangue, polystyrene and saw dust according to the proportion of the raw materials formulations; (2) grinding weighed coal gangue into powder, and mixing, adding water into, stirring the raw materials formulations into slurry, wherein the water addition is 23-25%; (3) placing the slurry as a product into a die to be subjected to compression moulding; (4) sending the compressed green body to a dry kiln to be dried, wherein the temperature is 100-150 DEG C, and the water content is 2-7%; (5) sending the dried green body in a tunnel kiln, and calcining for 38-42 minutes at the high temperature of 1,200-1,400 DEG C; and (6) cutting the calcined green body to form a finished product. The mullite refractory brick is energy-saving and is high in heat preservation efficiency.

Description

technical field [0001] The invention relates to the field of a lightweight high-temperature mullite refractory brick, in particular to a fly ash lightweight high-temperature mullite refractory brick. Background technique [0002] Fly ash is one of the largest industrial wastes in my country, and it is the main solid waste discharged from coal-fired power plants. With the development of the electric power industry, the discharge of fly ash from coal-fired power plants has increased year by year, polluting the atmosphere; the toxic chemicals in it can also cause harm to human body and organisms. The resource reuse of fly ash has become the most effective way to deal with industrial waste residue. The main oxide composition of fly ash is: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2, etc. Traditional refractory bricks are made by calcining bauxite and clay, but bauxite is a non-renewable resource, many of which need to be imported, and it needs to be ground into flour when used as a raw...

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Problems solved by technology

[0003] The present invention aims at the problems existing in the above products, and provides a lightweight high-temperature mullite refractory brick with fly ash to solve the raw materials required for making lightweight high-temperature refractory bricks. Bauxite is a mineral resource, which is non-renewable, and many It needs to be imported, and it needs to be ground into flour when used as a raw material. The grinding time is also long and the cost is high, and a large amount of fly ash discharge pollutes the environment. How to reuse fly ash resources