What kind of refractory bricks are best for glass kilns and how often should they be replaced?
Which type of refractory brick is best for a glass kiln depends on the specific structure, working conditions and required refractory performance of the kiln. The following are some common refractory brick types that are widely used in glass furnaces:
There are many types of refractory bricks used in glass kilns, each with its own unique properties and applicable scenarios. The following is a brief introduction to the several types of refractory bricks you listed and their applications in glass furnaces:
Silica bricks: Mainly used for the furnace roof of the melting part and working part, the breast wall and the front and rear end walls, the roof roof of the regenerator and the upper partition wall of the regenerator, etc.
Clay bricks: Mainly used in parts of the kiln with an operating temperature of 1300°C, such as checker bricks and wall bricks in the lower part of the regenerator, flue bricks and large clay bricks at the bottom of the pool.
Fused zirconium corundum brick: This brick has good corrosion resistance and thermal shock resistance, and is especially suitable for parts of glass furnaces that are in direct contact with molten glass, such as tank walls and flow channels.
Fused corundum brick: Fused α-βAl2O3 brick is a brick used in the working part or the cross passage tank wall of a float glass melting furnace. For large melting furnaces, it is mainly used in the working part, cross passages and branch passages.
Zircon bricks: Mainly used for separating bricks, fire holes, detection holes, etc. in the furnace of the melting part or the parapet and the furnace, etc., with good results.
High-purity magnesia bricks: mainly used for the upper grid brick part of the regenerator. Now they are also used for the upper wall bricks of the regenerator and are further developed in the regenerator.
Scope of use, etc.
Directly bonded magnesia bricks: mainly used for the middle and lower checker bricks of the regenerator (mainly used in the 800~1000℃ area).
Lightweight refractory material: It can reduce the heat dissipation of the kiln body, save energy, reduce the weight of the kiln body, and reduce the cost of the kiln. Lightweight refractory materials include lightweight insulating refractory bricks and aluminum silicate fibers.
When selecting refractory bricks, factors such as the specific structure, working conditions, erosion, and cost of the glass furnace need to be considered. In addition, the quality and performance of refractory bricks have an important impact on the operation and product quality of glass kilns. Therefore, reputable suppliers should be selected to ensure the quality and supply stability of refractory bricks.
As for the replacement cycle of refractory bricks, it mainly depends on the usage condition of the bricks, the operating conditions of the kiln and the maintenance status. Generally speaking, refractory bricks can continue to be used if they do not show severe erosion or damage. However, in order to ensure the safe and stable operation of the glass furnace, it is recommended that the refractory bricks be inspected and evaluated regularly. If the bricks are found to be significantly eroded, cracked or peeled off, they should be replaced in time.
Specific selection and usage suggestions should be determined based on the actual conditions of the glass kiln. It is recommended to consult Rongsheng Refractory or the kiln design unit to obtain more accurate suggestions and guidance.
Henan SNR Refractory Co.,Ltd are professional in producing different kinds of refractory materials for glass industry.Any demands,please don't hesitate contact with me.
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