The high alumina castable manufacturing is mainly based on the synthesis of high aluminium aggregate, powder and additives. It has high temperature performance, high resistance, high temperature, shrinkage, wear resistance and other characteristics. It is widely used in hardware, smelting, chemical industry, non-ferrous metal and other industries, especially in iron and steel industry. High alumian castable is important to be used in front of rotary kiln mouth, disintegrating furnace, kiln hood and other parts.
High strength high alumina castables are divided into conventional and low steel castables and ultra-low steel castables. Now in heavy steel for the important use of low steel type, and ultra-low steel type of high aluminum castable is used in the non-ferrous industry metallurgical furnace. Low steel and high aluminum castable and ultra-low steel high aluminum castable, but also has less water during construction and flow function, after the construction of early high intensity, high density, stripping early and short maintenance time, etc. Thus select high aluminum castable, to its position and qualitative number, so that the cost is reduced and the position used long cycle.
There are 7 performance indexes of high alumina castable manufacturing, including Al2O3 moisture content, volume relative density, sensible porosity, compressive strength of pressure test at room temperature, soft temperature under load, and thermal shock reliability. The popular point of Al2O3 water content is that Al2O3 water content in high alumina castable determines the height of various other characteristics. Therefore, it is the key performance parameter of high aluminium castable. The volume relative density is the ratio of the total volume between the dry quality of high aluminum castable. Volume relative density is a key expression of the high density level of high aluminum castable. Compressive strength at room temperature is the large bending stress that the strip specimen made of high aluminum castable can bear in the experiment. Generally, high purity raw materials are used, effective particle gradation of raw materials is manipulated, forming working pressure is increased, high-quality fusion agents are applied and calcination level of handicrafts is improved to enhance compressive strength of raw materials. Compressive strength refers to the ultimate load that the construction body of high aluminum castable can bear at a given temperature without being destroyed.
The low water content of concrete in high alumina castable manufacturing, that is to say, the low content of calcium oxide, reduces the raw materials caused by low and medium melts, thus improving the refractory, high temperature compressive strength and slag resistance of the goods. This series of refractory castable after the forming and maintenance, the converted concrete has fewer hydrates, so there is no excess water leakage during the heating and baking process, which reduces the compressive strength at medium temperature. Finally, the temperature rises, the raw materials are slowly calcined, and the compressive strength is constantly improved.
This series of high alumina refractory castable is basically prepared in the traditional way, which can adjust the particle size distribution, increase different water-reducing agent, reduce the amount of concrete, improve the characteristics, improve the compressive strength of medium temperature and the softening temperature of load, reduce the heat transfer coefficient, and have good heat resistance. With anti-wetting, anti-corrosion, anti-impact, anti-wear, good physical performance, furnace wall structure comprehensive strong, better sealing than brick furnace, broaden the furnace age, save repair furnace cost. I plant production of high quality refractory products, a full range of rich, welcome to consult procurement.