As a Refractory Brick Manufacturer, share with you.
Refractory bricks for coke ovens are mainly silica bricks, accounting for about 70% of the total refractory materials. It is currently the most suitable refractory brick known for the furnace wall of the carbonization chamber. In the coking process, at the same time and with the same coal contact area, if more heat in the combustion chamber can be transferred to the coking chamber, it will play a role in energy saving. There are two general energy-saving methods: reducing the thickness of the furnace wall and improving the heat transfer efficiency of the furnace wall material.
Silica Brick for Coke Oven
The furnace wall of the carbonization chamber is a relatively weak part, which plays a decisive role in the service life of the entire coke oven. Thinning the thickness of the furnace wall will inevitably reduce the strength of the structural unit of the furnace wall, and the overall service life of the coke oven will have a certain impact. At the same time, the furnace wall itself also has a heat storage function. Therefore, improving the thermal conductivity of the furnace wall material has a more important effect on the balance of the overall structure and functionality of the furnace wall.
Traditional coke oven silica bricks have good chemical stability. If the excellent properties of traditional coke oven silica bricks can be maintained, but also the thermal conductivity can be improved, the structure and stability of the material will be unified. Therefore, high thermal conductivity silica brick is a product that conforms to the development requirements of coke ovens. Baosteel and related units developed an ultra-high thermal conductivity furnace wall silica brick and successfully applied it to Baosteel's coke ovens.
Compared with traditional silica bricks, high thermal conductivity silica bricks have been greatly improved in terms of structural morphology, crystal structure, and physical and chemical indicators.
The structural morphology of high thermal conductivity silica bricks. Comparing the structure morphology of high thermal conductivity silica brick and traditional silica brick after magnifying 20 times, it is found that the pore diameter of high thermal conductivity silica brick is smaller and the distribution is more uniform. The gas in the pores has a lower thermal conductivity than the solid, so the pores always reduce the thermal conductivity of the material. Within a certain temperature range, for a certain porosity, the smaller the pores, the stronger the thermal conductivity.
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