How to identify the quality of refractory fire bricks, the characteristics of refractory fire bricks produced by different refractory brick manufacturers are also different, in addition to different raw materials, how to quickly distinguish the quality and technology of refractory fire bricks is particularly important.
A buyer or salesman can distinguish the advantages and disadvantages of refractory fire bricks with more than ten years of experience. These experiences are not only high-level building blocks for who has just entered the refractory material industry, but also difficult to summarize in words. . So how to distinguish the quality of a high-alumina refractory brick with only eyes:
1. Appearance color and appearance lubricity.
Looking at a refractory brick, we first look at its appearance color and appearance lubricity. When some refractory fire bricks are of poor quality, the appearance lubricity is poor, and the strength of the refractory fire bricks is not good.
The uniformity of the appearance and color of the refractory fire bricks indicates whether the materials are stirred evenly during the production of the refractory fire bricks. The uneven distribution of the materials leads to uneven distribution of the strength of the refractory fire bricks and reduces the overall strength and life of the refractory fire bricks.
The second is the appearance of impurities.
The other is to look at the content of impurities on the surface of refractory fire bricks. We often see some black spots on the surface of high-alumina bricks. These are impurities in the raw materials. In theory, the fewer impurities, the better, because most of these impurities are iron oxides. Under the high temperature environment of the kiln, it is easy to be reduced to molten iron and flow out, resulting in damage to the refractory brick structure, thereby affecting the service life of the refractory brick.
refractory fire bricks are used as industrial products, and their quality directly affects the production safety and production costs of enterprises. Residual refractory fire bricks will not only bring various maintenance strikes to production, increase production costs, but also bring more construction and production. Unpredictable security risks. Obviously, it is particularly important to quickly identify the quality of refractory fire bricks and find a reliable refractory brick manufacturer.
Heat resistance of high alumina refractory fire bricks
Aluminium refractory fire bricks are formed and calcined from bauxite or other raw materials containing more alumina. One of its important working characteristics is the structural strength at high temperature. With the temperature increase, but another important property is thermal shock resistance.
The thermal shock resistance of high alumina refractory fire bricks means that the temperature resistance of refractory fire bricks changes dramatically without being damaged. Due to the high operating temperature, in the working environment of the coal-water slurry gasifier, the essence of the service life of high-alumina refractory fire bricks is the change in high temperature or the obvious change in the viscosity-temperature characteristics of coal ash slag. In general, the higher the temperature, the lower the viscosity, the better the fluidity, the more serious the corrosion and penetration of high alumina refractory fire bricks, the greater the corrosion rate, and the shorter the service life of the bricks. So controlling the temperature is very important.
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