Converter and electric furnace gunning materials have the characteristics of high adhesion rate and good corrosion resistance at high temperature, especially in rotating furnaces.
Furnace, electric furnace later use effect is better. This product can be carried out in the furnace temperature between 300~1700C
For gunning, the amount of water added is generally about 15%, and it can also be adjusted according to the furnace temperature to achieve satisfaction
use effect. In the process of transportation and storage, attention should be paid to moisture-proof, so as not to agglomerate and affect the use effect.
The fruit has a shelf life of two months.
Chemical composition
Physical properties
MgO%
≥81
Bulk density g/cm3
2.70
CaO%
≤7.87
Refractorines ℃
1800
Fe2O3%
<3.15
The attachment rate%
85
SiO%
≤4.2
Bending strength MPa
1300℃×3h
>4
Al2O3%
≤2.1
1600℃×3h
>8
Converter and electric furnace gunning material construction requirements
1. Dry gunning is used, and water is added to the gun head.
2. Air pressure 5-8kg/cm, water pressure 4-5kg/cm.
3. When spraying, the distance between the gun head and the surface of the construction body should be kept 0.8-1m.
4. The thickness of one shot should not be greater than 30-50mm.
5. This material is suitable for hot repair of various converter furnace trees
The unshaped refractory material used when repairing the lining of thermal equipment by spray construction method is called refractory gunning material. It is made of a refractory set with a certain particle gradation
Acid resistant refractory gunning material is used for spraying of blast furnaces, hot blast stoves, hot blast pipes, flue protection layers, working layers, etc.
White corundum is made from industrial alumina powder, which is smelted in an arc at a high temperature above 2000 ℃ and then cooled. After crushing and shaping, magnetic separation to remove iron, it is divided into various particle sizes.
Corundum refractory castable has the characteristics of high strength and good fluidity, which is convenient for construction. It is mainly used for the parts that are easy to be washed and worn, such as the combustion chamber, separator and flue of circulating fluidized bed boiler.
Refractory wet mud used to block the iron outlet can be divided into two categories: water cannon mud and waterless gun mud. On large and medium -sized blast furnaces on high top pressure and high degree of smelting.
Insulating high alumina refractory bricks mainly refer to refractory products with an aluminum content of more than 48%. They are also called lightweight high-alumina bricks or heat-insulating high-alumina bricks due to their advantages of low bulk density, light weight, and good heat insulation effect. . It is a kind of thermal insulation refractory brick commonly used in high temperature industrial kilns and thermal equipment.