High Alumina Refractory Brick Main Ingreadient
Lightweight refractory material can be insulated, belong to the insulation material. It can reduce the kiln body heat, save energy, but also reduce the kiln weight, reduce the kiln cost. High Alumina Refractory Brick The main indicators of lightweight refractories are: bulk density, porosity, thermal conductivity, the use of temperature and mechanical strength.
(900 ~ 1200 ° C) - such as calcium silicate, lightweight clay brick, silicon, and so on. In the case of light refractory materials, it is classified into low temperature type (less than 900 ℃) according to the use temperature. Acid and aluminum fiber; high temperature (1200 ° C above), High Alumina Refractory Brick such as light high alumina brick, alumina hollow ball. According to the shape into fibrous, porous and granular. According to the bulk density is divided into sub-light (1.0 ~ 1.3g / cm3), light (0..4 ~ 1.0g / cm3) and ultra-light (0.4g / cm3 below). The high alumina refractory bricks are divided into the combustible matter method, the foam method and the chemical method according to the production method
Light insulation refractory bricks of the type and manufacturing process Light insulation refractory brick internal porous structure with thermal insulation properties of block insulation refractory products, of which the production and application of brick products is the most extensive, High Alumina Refractory Brick it is also known as light Insulation refractory bricks. Light insulation refractory bricks according to the raw materials can be divided into clay, siliceous, aluminum and mullite quality. Lightweight refractory bricks have low compressive strength, poor slag resistance, poor thermal shock resistance, and can not be in direct contact with glass or flameists the types and characteristics of light insulation refractory bricks by using the raw materials and ingredients used in the manufacture of lightweight refractory bricks.
Lightweight clay insulation brick is refractory clay as the main raw material made of A1203 content of 30% to 48% of the insulation refractory products. High alumina refractory brick its production process using burn-in method and foam method. The products with the bulk density of 0.3 ~ 1.5g / cm3 were prepared by using refractory clay, High Alumina Refractory Brick floating beads and fire-resistant clay clinker as raw materials, adding binder and sawdust, and mixing, molding, drying and firing. Lightweight clay insulation brick is widely used, mainly used in a variety of industrial furnace does not touch the melt and no erosion of the role of the insulation layer of refractory materials, the use of temperature 1200 ~ 1400 ° C. Our standard (GB3994-2005) lists the technical standards for clay insulation and refractory bricks.
Light silicon insulation brick is made of silica as the main raw material Si02 content of not less than 91% of the insulation refractory products. High alumina refractory bricks Light siliceous insulation brick bulk density of 0.9 ~ l.lg / cm3, thermal conductivity is only half of the ordinary silica bricks, good thermal shock resistance, the load softening start temperature up to 1600 ° C , High Alumina Refractory Brick Much higher than clay insulation bricks. So the maximum temperature of silicon insulation bricks up to 1550 ° C. In the high temperature does not shrink, and even a slight expansion.
Lightweight silica bricks are generally made of crystalline quartzite as raw materials, and combustibles are added with flammable substances such as coke, anthracite, sawdust and so on, or the porous structure is formed by gas foaming. High alumina refractory brick and ordinary silicon brick production industry similar to the ingredients added some mineralizer (CaO, Fe203) to promote the transformation of quartz, High Alumina Refractory Brick with pulp waste as a binder so that the brick has a certain strength. In the use of coke or anthracite as a combustible, due to the ash will be brought into Fe203 and Al2O3, the ingredients do not need to add additional iron and phosphorus. High Alumina Refractory Brick When the light silica bricks are fired, the strong oxidizing flame should be maintained before 1200 ° C, so that the additions are completely burned.