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Principles to be followed in the selection of refractory bricks for industrial kilns

Principles to be followed in the selection of refractory bricks for industrial kilns

There are many types of industrial kilns and their structures are more complicated. Among them, the selection and application of refractory bricks are often very different. No matter what kind of refractory bricks are selected for industrial kilns, they must meet the following requirements: first, they can withstand high temperature without softening and melting, and they must also withstand high temperature loads. It does not lose the internal structural strength of refractory bricks, does not deform, has good high-temperature volume stability, has small reburning line changes, and can resist high-temperature gas erosion and slag erosion. The size of the refractory bricks is regular, and the specific parts of the kiln need to be determined by the actual situation.

Principles that should be followed when selecting refractory bricks for industrial kilns:

1. First of all, we must understand the characteristics of industrial kilns, choose refractory bricks according to the design of the kiln, the working environment and working conditions of each part, and analyze the damage mechanism of refractory bricks used in industrial kilns to achieve targeted Choose refractory bricks. For example, refractory bricks for ladle, because the molten steel contained in the ladle is alkaline, the molten steel undergoes physical erosion and chemical erosion when poured into the ladle, and thermal stress caused by sudden temperature changes. Generally, magnesia-carbon refractory bricks with good resistance to slag erosion are used as the The ladle is lined with masonry.


2. To understand the properties of refractory bricks, be familiar with the properties and characteristics of refractory bricks, such as the chemical mineral composition, physical properties and working performance of the refractory raw materials used in refractory bricks, and give full play to the advantages of refractory raw materials selected for refractory bricks , After the reasonable configuration of the refractory raw material formula, the refractory bricks have better performance.

3. Reasonably control the overall use of the kiln. Different parts of the kiln have different operating environments and working conditions. The selected refractory bricks should also be properly matched. Make sure that there will be no chemical reactions and melting damage between refractory bricks of different materials in a high temperature environment, and ensure that all parts of the kiln lining Balance the loss of the furnace, reasonably control the overall use of the furnace, ensure the overall service life of the furnace, and avoid the different repair conditions of different parts of the furnace.

4. Refractory bricks for industrial kilns must not only meet the requirements for use, but also consider the rationality of economic benefits. If clay bricks can meet the needs of industrial kilns, there is no need to choose high-alumina bricks. Therefore, the selection of refractory bricks for industrial kilns should be considered comprehensively.