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Analysis on the Reasons of Furnace Passing Through and Furnace Lining Peeling in Refractory System for Coreless Induction Furnace

Analysis on the Reasons of Furnace Passing Through and Furnace Lining Peeling in Refractory System for Coreless Induction Furnace

(Summary description)Refractory System for Coreless Induction Furnace manufacturers tell you that generally speaking, good quality refractory materials have good effect and long life in furnaces, but the conditions of use cannot be ignored.

Analysis on the Reasons of Furnace Passing Through and Furnace Lining Peeling in Refractory System for Coreless Induction Furnace

(Summary description)Refractory System for Coreless Induction Furnace manufacturers tell you that generally speaking, good quality refractory materials have good effect and long life in furnaces, but the conditions of use cannot be ignored.

Information

Refractory System for Coreless Induction Furnace manufacturers tell you that generally speaking, good quality refractory materials have good effect and long life in furnaces, but the conditions of use cannot be ignored. Just like a kind of refractory materials used in the same thermal equipment, because When the conditions of use are changed, the results of use are often very different. Refractory System for Coreless Induction Furnace manufacturers tell you that there are many reasons for furnace lining failure, such as furnace penetration and lining peeling. The following mainly introduces the analysis of the reasons for the penetration of the induction furnace and the peeling of the furnace lining.

good price and quality Refractory System for Coreless Induction Furnace in china
The phenomenon of furnace penetration is as follows: a large amount of metal penetrates into the cracks of the refractory material.
Passing through the furnace will result in: metal penetration around the pass through the furnace; significantly reduced life of the furnace lining; early grounding alarms; potential risk of molten metal drilling into the coil; The ground expands from the furnace mouth; the oxidation of the part passing through the furnace will cause the erosion of local refractory materials, etc.
The main reason for the formation of the furnace is the cracks formed by the cooling and heating cycle, including horizontal cracks, vertical cracks and cracks in any direction. The main reasons for the formation of horizontal cracks are:
①Layering: Incorrect furnace building method, resulting in no dense lining knot layer formed on the furnace lining;
② Furnace lining attachment: Refractory System for Coreless Induction Furnace manufacturers tell you that it often occurs at the junction of the liquid outlet and the working furnace lining, which can be solved by changing the construction method of the furnace nozzle. Vertical cracks are caused by thermal shock and are mainly caused by incorrect cooling and re-melting processes. Cracks in any direction are generally caused by mechanical impact or demolding.
Lining peeling is a phenomenon in which the refractory material falls off the sintered furnace wall in lumps or sheets.
The reasons for the peeling of the furnace lining are:
(1) Improper furnace building or sintering causes the furnace lining to not form a good sintered layer, causing the furnace lining to peel off.
(2) Water vapor: When the furnace lining is sintered, the speed is too fast, and the water in the refractory material cannot be discharged in time. H2O is decomposed into H2 and O2 at high temperature. According to the ideal gas equation: PV=nRT, it can be seen that the temperature of the gas rises rapidly, the product of the pressure and volume of the gas will expand rapidly, and the volume will expand rapidly. The manufacturer of Refractory System for Coreless Induction Furnace tells you the pressure The rapidly increasing gas will cause spalling of the unsintered furnace lining.
(3) Mechanical spalling: The repeated impact of the charging on the furnace lining, especially the furnace bottom, is the main reason for mechanical spalling.
(4) Expansion and spalling: After the molten metal erodes the furnace lining, the thermal expansion rate of the part eroded by the metal is inconsistent with the thermal expansion rate of the non-eroded part, which makes it easy to generate irregular stress at the interface between the two and cause the furnace lining to fall off.
(5) Extrusion peeling: often occurs at the bottom of the furnace, caused by the impact of the charging material on the bottom of the furnace and the long-term pressure of the molten metal on the bottom of the furnace.
(6) Thermal spalling: The manufacturer of Refractory System for Coreless Induction Furnace tells you that the temperature changes rapidly, and the fluctuation is too fast and too large in a short period of time, resulting in large internal stress of the refractory material, resulting in cracking, peeling and damage.

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