Resin combined tundish working lining anti-oxidation coating

Abstract

The invention relates to the technical field of refractory coatings, in particular to a resin combined tundish working lining anti-oxidation coating. The coating contains low-temperature glass powder, solid water glass, caustic-burned magnesia powder, white dextrin, sodium tripolyphosphate, hydroxypropyl methyl starch ether, ferrosilicon slag powder, silica fume, silicon carbide source gas and deionized water; the following components in parts by weight are as follows: 16-20 parts of low-temperature glass powder, 6-11 parts of solid water glass, 27-33 parts of caustic-burned magnesia powder, 2-4 parts of white dextrin, 2-4 parts of sodium tripolyphosphate, 1-2 parts of hydroxypropyl methyl starch ether, 28-35 parts of ferrosilicon slag powder, 3-7 parts of silica fume, 50-85 parts of silicon carbide source gas and 57-62 parts of deionized water. The problems that in the prior art, carbon loss under the working condition of high-temperature baking of the working lining cannot be avoided, the depth of a decarburized layer is large, the strength of the working lining is low, the service life of the working lining is short, a packet collapse accident is likely to be caused when decarburization is serious, and the safety risk is high can be effectively solved.

Description

technical field [0001] The invention relates to the technical field, in particular to a resin-bonded tundish working lining anti-oxidation coating. Background technique [0002] The tundish is an important link in the continuous casting process of the iron and steel industry. As a transitional steel container, it can store a certain amount of molten steel when changing the ladle and ensure the continuous operation of the continuous casting machine. Improve continuous casting efficiency, prevent secondary oxidation and gas absorption of molten steel, improve the flow state of molten steel, promote the floating and removal of non-metallic impurities in molten steel, and reduce the adverse effects of impurities on the quality of billets. [0003] Dry vibrating material is currently the most widely used tundish working lining refractory material. Most of the binders used are phenolic resins. Usually, they are quickly baked to 1100°C 1-2 hours before molten steel is poured, and t...

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Problems solved by technology

[0003] Dry vibrating material is currently the most widely used tundish working lining refractory material. Most of the binders used are phenolic resins. Usually, they are quickly baked to 1100°C 1-2 hours before molten steel is poured, and the holding time can be done after 1 hour. It is used in pouring. At this time, the bonding strength of the ceramic formed after resin carbonization is good, the loss of carbon oxidation is limited, and it is easy to turn over the bag after use, which belongs to the best working condition. Due to the influence of conditions such as unexpected abnormalities and poor process connection, the phenomenon of early or delayed pouring of the tundish often occurs

[0004] In order to deal with this situation, some steel mills adopt the method of putting the tundish in the high-temperature baking state in advance and preparing the tundish for use at any time. The advantage is that the tundish can be used at any time, which improves the ability to deal with abnormal working conditions and avoids related accidents or losses The unfavorable aspect is that the resin carbonization layer is in a high temperature state for a long time, and the carbon loss is serious. With the prolongation of the baking time, the decarburization layer deepens, which significantly reduces the strength and erosion resistance of the working lining, and even leads to the occurrence of the bag problem. , bringing certain economic losses and safety risks

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