Method for repairing furnace lining of intermediate frequency furnace used in steelmaking

Abstract

The invention discloses a method for repairing a furnace lining of an intermediate frequency furnace used in steelmaking. The method comprises the steps as follows: step one, firstly, an electric shovel is utilized to completely remove oxidizing materials attached on the furnace wall, then, the shovel is utilized to uniformly removing impurities on the periphery of the furnace wall, and a furnace chamber is cleanly blown by compressed air; step two, a furnace lining material, water and bittern slices are uniformly mixed in a mass mixing ratio of 1,000:100:15 to obtain a mixture culturing pile which is placed for 1-2 hours; step three, 5 Kg of a mixed liquid of bittern slices and water is taken, the mass content of the bittern slices in the mixed liquid is 30%-50%, the mixed liquid is uniformly sprayed onto the furnace bottom and the furnace wall; step four, ramming is performed for two to three times at the furnace bottom, the sand filling thickness is not more than 100 mm every time; step five, the furnace wall ramming is performed; step six, furnace collar ramming and furnace mouth ramming are performed; step seven, the furnace lining is dried naturally; step eight, wood charcoal is used for baking; and step nine, a charged material is melted. The method is simple and fast to operate, further, the potential danger of furnace penetration is reduced, and the safety is ensured.

Description

technical field [0001] The invention relates to a method for repairing the lining of an intermediate frequency furnace for steelmaking. Background technique [0002] In the use of intermediate frequency furnaces to smelt composite deoxidizers with high aluminum content such as ferro-silicon and ferro-aluminum manganese, AlO (aluminum oxide), SiO (silicon oxide) and other high-melting point oxides often appear on the furnace wall, making the furnace more and more The smaller it is, the harder it is to produce normally. In order to reduce the cost, remove the adhered oxide and continue to use it. However, when the thickness of the furnace lining at the bottom of the furnace is less than 60mm, the furnace lining needs to be repaired. In the patent CN200510099342, the present invention relates to a furnace lining repair method, especially a method for repairing the furnace lining of an intermediate frequency furnace for steelmaking. It includes the following steps: a. b. clean...

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Problems solved by technology

[0003] This method is only applicable when the bottom of the furnace substrate is damaged, and it cannot be used when the upper part of the furnace lining or the entire furnace lining is damaged; and the furnace lining repaired by this method will reduce the capacity of the furnace, which will affect production efficiency

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