CN103183517A - Light-weight high-temperature mullite refractory brick prepared from pulverized fuel ash - Google Patents

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

A kind of coal ash light high temperature mullite firebrick

Technical field

The present invention relates to a kind of lightweight high temperature mullite firebrick field, particularly relate to a kind of coal ash light high temperature mullite firebrick.

Background technology

Flyash is one of bigger industrial residue of the current discharge capacity of China, and flyash is the main solid waste that the coal-burning power plant discharges.Along with development of electric power industry, the flyash quantity discharged of coal-burning power plant increases atmosphere pollution year by year; Toxic chemical substance wherein also can work the mischief to human body and biology.The resource reutilization of flyash becomes handles the effective way of industrial residue, and the main oxides of flyash consists of: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2 etc.Tradition refractory brick uses aluminium vanadine and clay calcination to make, but the aluminium vanadine belongs to a kind of Nonrenewable resources, much also needs import, and also needs grinding to become face in using as raw material, and grinding time is also longer.

Summary of the invention

The present invention is exactly the problem that exists at the said products, a kind of coal ash light high temperature mullite firebrick is provided, solve and make the required raw material of lightweight highiy refractory brick, the aluminium vanadine is a kind of mineral wealth, and is non-renewable, much also needs import, and in using as raw material, also need grinding to become face, grinding time grows up to also that this is higher, and a large amount of flyash discharge capacity contaminate environment, how to make the problem of fly ash recycling.

The present invention is by the following technical solutions: a kind of coal ash light high temperature mullite firebrick, the composition of raw materials ratio is: flyash 40%-50%, clay 25%-35%, aluminium powder 10%-20%, coal gangue 7%-8%, polystyrene 1%-2%, sawdust 0.5%-1.5%.

A kind of coal ash light high temperature mullite firebrick making processes is:

(1) takes by weighing flyash 40%-50%, clay 25%-35%, aluminium powder 10%-20%, coal gangue 7%-8%, polystyrene 1%-2%, sawdust 0.5%-1.5% in the composition of raw materials ratio;

(2) the above-mentioned coal gangue that takes by weighing is carried out grinding to form in 3 hours powdery in ball mill, the above-mentioned composition of raw materials mixing and water adding that takes by weighing is stirred into mud, amount of water is 23%-25%;

(3) with above-mentioned mud by the required size of the goods corresponding mould of packing into, compression moulding;

(4) base substrate after will suppressing is delivered to dry kiln and is dried, and temperature is 100 ℃-150 ℃, and making water content is 2%-7%;

(5) base substrate after will drying is sent in the tunnel furnace, calcines 38-42 minute under 1200 ℃-1400 ℃ high temperature, and the waste heat after the calcining is used for the drying to base substrate;

(6) base substrate after will calcining is cut mill and is formed finished product.

The present invention compared with prior art has following beneficial effect: described a kind of coal ash light high temperature mullite firebrick, 1800 ℃ of JM mullite flame-proof degree, aluminum content is at 60%-65%, energy-conservation, the insulating efficiency height, the refractoriness height, thermal conductivity is little, can alleviate furnace wall thickness, shortens firing time, reduces fuel consumption, improves thermo-efficiency, reduce cost.

Embodiment

A kind of coal ash light high temperature mullite firebrick, the composition of raw materials ratio is: flyash 45%, clay 30%, aluminium powder 15%, coal gangue 7.5%, polystyrene 1.5%, sawdust 1%.

A kind of coal ash light high temperature mullite firebrick making processes is:

(1) takes by weighing flyash 45%, clay 30%, aluminium powder 15%, coal gangue 7.5%, polystyrene 1.5%, sawdust 1% in the composition of raw materials ratio;

(2) the above-mentioned coal gangue that takes by weighing is carried out grinding to form in 3 hours powdery in ball mill, the above-mentioned composition of raw materials mixing and water adding that takes by weighing is stirred into mud, amount of water is 23%-25%;

(3) with above-mentioned mud by the required size of goods pack into length be 240 millimeters, wide be that 115 millimeters, height are that 53 millimeters the hexahedral mould inner pressure in right angle is made type;

(4) base substrate after will suppressing is delivered to dry kiln and is dried, and temperature is 120 ℃, and making water content is 2%;

(5) base substrate after will drying is sent in the tunnel furnace, calcines under 1200 ℃ high temperature 40 minutes, and the waste heat after the calcining is used for the drying to base substrate;

(6) base substrate after will calcining is cut mill and is formed finished product.

Claims (2)

1. coal ash light high temperature mullite firebrick, it is characterized in that: the composition of raw materials ratio is: flyash 40%-50%, clay 25%-35%, aluminium powder 10%-20%, coal gangue 7%-8%, polystyrene 1%-2%, sawdust 0.5%-1.5%.

2. a kind of coal ash light high temperature mullite firebrick according to claim 1, it is characterized in that: making processes is:

(1) takes by weighing flyash 40%-50%, clay 25%-35%, aluminium powder 10%-20%, coal gangue 7%-8%, polystyrene 1%-2%, sawdust 0.5%-1.5% in the composition of raw materials ratio;

(2) the above-mentioned coal gangue that takes by weighing is carried out grinding to form in 3 hours powdery in ball mill, the above-mentioned composition of raw materials mixing and water adding that takes by weighing is stirred into mud, amount of water is 23%-25%;

(3) with above-mentioned mud by the required size of the goods corresponding mould of packing into, compression moulding;

(4) base substrate after will suppressing is delivered to dry kiln and is dried, and temperature is 100 ℃-150 ℃, and making water content is 2%-7%;

(5) base substrate after will drying is sent in the tunnel furnace, calcines 38-42 minute under 1200 ℃-1400 ℃ high temperature;

(6) base substrate after will calcining is cut mill and is formed finished product.