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Details of the production process of high alumina bricks

Details of the production process of high alumina bricks

High alumina bricks can be said to be a variety of refractory materials with the largest output and utilization rate. Although the production process is basically the same as that of clay bricks, there are differences in the grade of raw materials and the sintering temperature.

The production of high alumina bricks is first controlled from the selection of raw materials. Under normal circumstances, manufacturers will choose to store old raw materials for some time, because the newly burned materials will contain some impurities and are not weathered. The produced high alumina bricks will be Foaming, black spots, and long-standing material impurities have been weathered away. The high alumina bricks produced are quite stable in terms of surface color and internal quality.


The binding agent in the production control process of high alumina bricks is also the most important thing. The ratio should not be too large. After the raw materials are selected, they are crushed, granulated, and then a reasonable ratio of binding agent and powder are added. The mixing should not be less than 10 minutes. , The mixing time is too short, which will affect the finish and pores of the finished high alumina brick.

After the production of high-alumina bricks control raw materials, crushing, process proportions, and mixing, they are formed by a high pressure press. During the forming process, attention should be paid to the control of the top hammers. High alumina bricks will have internal spalling. The number of forming pressures for high alumina bricks depends on the weight of the high alumina bricks. Generally, several kilograms of hammers are used, with light and heavy hammers at first, no less or more hits. The high alumina bricks are not dense enough when hitting less, and hitting more is easy to crack.


After being shaped, the high alumina bricks are sorted and then sintered in the tunnel kiln. Generally, the binder is first sintered to fill the pores and sinter on the particles. As the temperature rises, the density and strength increase. So as to obtain the overall performance of the high alumina brick. However, the firing temperature is determined by the different raw materials used for high alumina bricks. The higher the aluminum content, the higher the sintering temperature.

After high-alumina bricks are sintered at high temperature, the finished products are sorted and boxed, and then packaged and shipped to the user. In short, the production process of high alumina bricks is actually high-pressure forming and high-temperature sintering. Only in this way can the indicators of high alumina bricks be guaranteed.