Which Of The Aluminum Content And Bulk Density Of High Alumina Bricks Is Easier To Achieve?

In the production of high alumina bricks, the aluminum content is relatively easy to achieve, but the density is relatively difficult to achieve. Among refractory shaped products, high-alumina bricks are the same products with relatively large amounts of clay bricks. Refractory bricks belonging to the mid- to low-end series.

1. The difference between high alumina refractory bricks and clay bricks

In the production of high alumina fire bricks and clay bricks, high alumina bricks are easier to produce than clay bricks because the higher the grade of raw materials, the fewer impurities. It is difficult to control too many impurities. The production of high-aluminum materials is relatively easier to control than clay materials.
The production process of high alumina refractory bricks is basically the same as that of clay bricks. The difference is that the sintering temperature is different. The firing temperature of high alumina firebricks is 80-100°C higher than that of clay bricks, but the firing temperature of high alumina refractory bricks is The indicators of compressive strength and load softening temperature are higher than those of clay bricks.

2. The aluminum content of high alumina bricks cannot be measured by price.

The aluminum content of both high-alumina bricks and clay bricks is relatively easy to achieve. The national standard for aluminum content of clay bricks is 42, but basically the aluminum content of clay bricks is 55. The aluminum content of high-alumina refractory bricks is also easy to achieve, and the volume Density above 2.5 is not easy to achieve. If it is made, it can be made, but for every half point increase, the price will be several hundred yuan higher.

Therefore, the aluminum content of high-alumina bricks or clay bricks cannot be measured by price. The key is the volume density. If the volume density is high and the aluminum content is the same, the price will differ by hundreds or even thousands of yuan.

3. What is not very reasonable is the price comparison.

Some manufacturers only look at the aluminum content to compare prices when purchasing high-alumina bricks and refractory bricks. This is actually an unreasonable comparison method. In this way, the price will be quite different, the volume density will be different, and of course, the strength will be different. 

4. Price difference

There are many grades of high alumina bricks, and the price of bricks with the same aluminum content will vary by three to five grades. The price difference lies in the indicators of bulk density, load softening temperature, and normal temperature strength.
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