Related characteristics of refractory bricks

Introduction

Refractory bricks are referred to as fire bricks. Refractory made of fire-resistant clay or other refractory materials. Pale yellow or brown. According to the preparation process, it can be divided into fired bricks, unfired bricks, fused bricks, and refractory and heat-insulating bricks.

It can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects at high temperatures. For example, refractory clay bricks, high alumina bricks, silica bricks, magnesia bricks, etc.

Features

Own attributes

1. Chemical composition: The main components determine the quality and characteristics of the refractory material.

2. Bulk density: The weight per unit volume and the high density indicate that the compactness is good and the strength may be high, but the thermal conductivity may be high.

3. Obvious porosity: No specific requirements are made, but as a manufacturer, the obvious porosity must be strictly controlled.

4. Load softening temperature: also called high temperature load starting deformation temperature, this parameter is very important, marking the material's resistance to high temperature.

5. Thermal shock resistance: the ability to resist sudden changes in temperature without being destroyed.

6. Compressive strength: the ability to withstand the maximum pressure (normal temperature).

7. Flexural strength: the ability to withstand shear pressure.

8. Linear change rate: It is also called reburning line change or residual line change, which refers to the change in volume expansion and contraction in the same temperature change every time. If each expansion and contraction is the same, we define such a linear change rate as 0.

Physical and chemical properties

1. Wear resistance

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

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

4. Slag resistance: the ability to resist the erosion of molten slag without being destroyed at high temperatures.

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