Whether the refractory material can achieve the expected use effect, the structure of the design is very important, and often not too much structural design changes, but it can fundamentally change the working stability of the furnace. Therefore, on the basis of meeting the process requirements, it is necessary to have a reasonable structural design. The tube processing factory quenching furnace burner, the burner brick structure originally designed is a long thin-walled structure, the outermost metal shell to fix the burner brick. The length of the burner block that extends into the furnace is 420, and the wall of the burner block is very thin. The burner block is surrounded by light castables. The thin-walled structure of this long burner is very unstable and prone to cracking.
Quenching furnace is the use of light oil as a fuel, the use of compressed air to atomize the light oil to burn sometimes there will be poor light oil atomization, fuel combustion is not complete, coking, local temperature is too high, these will accelerate the burner brick After the cracking burner brick cracks, the flame penetrates through the crack, causing the metal shell part of the fixed burner brick to oxidize, the flame passes through the oxidized metal shell and burns to the furnace skin plate, so that the furnace skin plate burns red and even deforms. Choose a reasonable refractory material. According to the characteristics of quenched furnace burner tile refractory environment, it must have high temperature and pressure resistance, high temperature flexural strength, good anti-erosion, anti-erosion, resistance to quenching and rapid thermal performance. Based on these characteristics, we chose ultra-low cement castables, that is, a grade bauxite clinker was used as aggregate, and some mullite was added to the matrix material. Ultrafine powder technology was used to add some pure calcium aluminate cement and a small amount of reduction. Water agent, explosion-proof agent. Because of the low refractoriness of lightweight castables, the compressive strength and flexural strength are very low and they cannot be in direct contact with the flame.
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