The reasons of refractory brick collapse in the process of use

For refractory brick, we should not feel strange. With the progress of society, the application of refractory brick is more and more widely. Refractory brick appear collapse phenomenon, in the actual use so, what causes it; following the Xinmi Changxing refractory material factory is simple to give you introduced the refractory brick collapse reason

Refractory brick 1, red hot suddenly quenched with water to produce rupture and fall.

The 2 stage, oven heating rate master is not strict, temperature rise too fast, causing severe dehydration, masonry and damage due to expansion and shrinkage.

3 build stove masonry to expand stay insufficient, cracked and falling temperature after expansion.

4, the ash accumulation system, most of the metal salt corrosion of the refractory brick, embitterment of vanadium and nickel will penetrate into the refractory brick falling off caused by.

5 when the liquefied gas, heating, air flow ratio is undeserved, cause furnace blasting and vibration split off.

6, poor air flow furnace, flame directly flush furnace brick, the furnace brick thinning after a serious fall.

7, the operation too, lifting furnace temperature pressure to balance, it is strictly prohibited to excessive temperature and pressure, avoid the sharp rise in the drop, because the temperature of each layer of brick always lags behind the furnace temperature, the more rely on the outer temperature changes more slowly, if drastic changes in a short time the temperature of the furnace, brick layer between refractory brick and brick joints rupture is caused due to temperature difference is too large to generate huge internal stress. Furnace pressure will cause the sudden change, refractory brick for each layer of gas pressure can’t balance, pressure increasing and destroyed, may cause the whole refractory lining of furnace temperature fluctuation pressure serious collapse.

Silicon nitride bonded silicon carbide product introduction

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The organizational structure of refractory materials

Influence of refractory materials under various physical, chemical interaction in high temperature in the process of using, produce corrosion, wear or crack damage. Therefore, the chemical composition is the basic characteristics of refractory materials; the main components are the basic characteristics of refractory material, so the composition and quantity directly determines the performance of refractory materials.

Refractory products at the same time, mineral composition, product nature is the comprehensive reflection of mineral composition and microstructure, therefore can not only from the chemical composition analysis of the effect on the properties of products. Refractory mineral composition and depends on the chemical composition and process conditions. Although the same chemical composition. If the different processing conditions. The formation of amorphous phase, the number and types of minerals will also have the difference, the performance of refractory materials are also different. However, it must be stressed that the refractory material macro organizational structure is an important factor which influences the use performance, and the performance index can reflect the inner structure of refractory products.

For example: the degree indicates the nature of dense – porosity, bulk density, true density; said gas-permeable nature of the degree of difficulty – Porosity: indicates the nature of the thermal properties – the linear expansion coefficient, thermal conductivity, heat capacity, and temperature conductivity; indicates the nature of the mechanical properties – normal and high temperature compressive strength, high temperature flexural strength, high temperature torsional strength, high temperature creep resistance and modulus of elasticity; said high-temperature performance of a – refractoriness, high temperature load softening temperature , High temperature volume stability, thermal shock resistance and slag resistance.