Electroslag remelting method for producing large steel ingots by plurality of small furnaces

Abstract

The invention discloses an electroslag remelting method for producing large steel ingots by a plurality of small furnaces. The method comprises the following steps of A, electroslag remelting machinery preparation: using three-phase electroslag remelting furnaces, and installing nine consumable electrodes in each furnace of the three-phase electroslag remelting furnaces; B, slag material proportioning: proportionally mixing fused alumina, limestone and high-purity fluorite; C, remelting refining: gradually putting the proportioned slag materials into a crystallizer until all slag materials are thoroughly melted in the crystallizer, charging the materials into the consumable electrodes after most slag materials are thoroughly melted, and after the consumable electrodes in the furnace are melted to the proper degree, changing a next group of consumable electrodes for continuous remelting until the remelting of all of the consumable electrodes is completed; D, deoxygenation: continuously adding complex deoxidizers into the crystallizer while the slag materials are gradually put into the crystallizer; and E, mold stripping: performing mold stripping after 3 to 6 hours from the electroslag remelting completion, and then performing hot delivery and furnace entering. Through the electroslag remelting by the plurality of small furnaces, the content of each ingredient can be conveniently controlled.

Description

technical field [0001] The invention relates to a method for manufacturing steel ingots, in particular to an electroslag remelting method for producing large steel ingots in a plurality of small furnaces. Background technique [0002] The development of high parameters and large capacity of heavy equipment makes the size and tonnage of large forgings larger and larger, and the quality and performance requirements of forgings are getting higher and higher. The larger the forging, the higher the quality requirements, and the greater the risk of scrapping the forging. The metallurgical quality of steel ingots is the basis and prerequisite for obtaining large forgings, and plays a key role in the production of large forgings. [0003] The production of steel ingots is usually divided into two steps, namely melting and casting. Electroslag remelting combines the two processes of smelting and casting into one. In the same metal mold, the two processes are carried out and complet...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to solve the problem of controlling the height of each component in the prior art in the production process of large-scale electroslag ingots, and to provide a method of using existing small furnaces to produce several furnace consumable electrodes. Electroslag remelting method for producing large steel ingots through multiple small furnaces with small melts to obtain large electroslag ingots with high uniformity