What are the basic characteristics of refractory bricks?

Because it is a building decoration material used in high temperature environments, the high temperature raw material characteristics of refractory bricks are particularly suitable for application in such environments. This type of raw material is mainly used in industrial kilns. Because of the characteristics of contemporary technology, the performance of refractory bricks is very high. So what are the basic characteristics of refractory bricks?

Basic characteristics of refractory bricks:

"Fire resistance" refers to the function that refractory products can withstand high temperatures without melting during production and use. The refractory brick hydraulic press can effectively reduce costs and save material loss, especially in terms of yield. It not only improves the production efficiency of the refractory brick factory, but also greatly saves labor costs. "" Room temperature strength "is one of the main quality indicators of unburned refractory products and amorphous refractories.

The brick has a small porosity, indicating good density and good quality. One of them is called "apparent porosity", which refers to the ratio of the volume of pores (ie gasification) connecting the refractory to the atmosphere to the total volume. The other is "high temperature compressive strength", which refers to the compressive stress that a refractory sample can withstand without damage to the unit cross-sectional area under the premise of burning to a specified high temperature. The porosity of both refractories is expressed as a percentage.

There are two concepts for the compressive strength of refractory products, one is "normal temperature compressive strength", which refers to the compressive strength per unit area of the sample that can withstand without damage in the laboratory.

Using a four-column hydraulic system, the brick pressing force is average and the pressure is high. Widely used in the refractory industry, as well as some refractory brick manufacturers, especially in the production field of large refractory materials and special refractory materials. More importantly, it is necessary to play an important role. By changing the mold material ratio of the refractory press, it is easier to produce various refractory materials. On the basis of not increasing equipment investment, the use of hydraulic presses to produce refractory bricks can realize multi-purpose and multi-function of one machine. The other is called "true porosity", that is, the ratio of the volume of all pores (including open and closed cells) to the total volume of refractory products "normal temperature compressive strength" is to measure the impact resistance, wear resistance and resistance of ordinary refractory products. One of the important indicators of liquid slag initializing performance.

What are the physical properties of refractory bricks:

1. Wear resistance: Everyone knows that I will not say much, it is one of the quality indicators of refractory materials.

2. Thermal conductivity: Under the condition of unit temperature layer, the heat flow rate per unit area of the material is related to the porosity.

3. Impact resistance: No need to explain, good impact resistance and long service life.

4. Slag resistance: the ability to resist the erosion of dissolved slag at high temperature without being damaged.