Electric arc furnace cover casting material, electric arc furnace cover and production method of electric arc furnace cover

Abstract

The invention discloses an electric arc furnace cover casting material, an electric arc furnace cover and a production method of the electric arc furnace cover. A steel structure of the electric arc furnace cover also comprises a reinforcing member; the reinforcing member includes U-shaped supporting rods and a first connecting rib; a through hole is formed in an apron board; the first connecting rib penetrates through the through hole and is fixed; the inner side of the apron board is provided with the U-shaped supporting rods fixed with the first connecting rib; a cavity formed by the apron board, a round bearing plate, the U-shaped supporting rods and the first connecting rib is filled with the casting material and forms a whole, the middle of the whole is provided with graphite electrode holes, and graphite electrodes are inserted in the electrode holes. The electric arc furnace cover has the use performance significantly improved and have relatively high etching resistance and antistrip performance; the etching rate of an electric arc furnace cover work layer tends to be consistent; the age of the electric arc furnace cover is increased to 260 times or more from the original of 200-220 times, the service life of the electric arc furnace cover is prolonged, the work efficiency and benefits of an electric arc furnace are improved, the consumption of the ton steel refractory casting material is reduced, and the cost of production is saved.

Description

Technical field [0001] The invention belongs to the technical field of electric arc furnace steelmaking equipment, and in particular relates to an electric arc furnace cover, and also relates to a castable for the electric arc furnace cover and a production method of the electric arc furnace cover. Background technique [0002] Electric arc furnace is an important equipment for the production of special steel and high alloy steel. The electric arc furnace includes an electric arc furnace cover. A graphite electrode is inserted into the electric arc furnace cover. The graphite electrode is used to input electric energy into the electric arc furnace to generate electricity between the electrode end and the charge. The arc is the heat source for steelmaking. Such as figure 1 with figure 2 As shown, the currently used electric arc furnace cover includes a steel structure and a castable. The steel structure includes a circular load-bearing plate and a skirt plate. The upper and lower...

AI Technical Summary

Problems solved by technology

[0003] However, the electric arc furnace cover is made of refractory castables, circular load-bearing plates and skirts as a whole. Usually, due to the insufficient strength of the refractory castables at room temperature, the electric arc furnace cover is used from hoisting, transportation and to the electric arc furnace cover. The electric arc furnace cover is seriously missing edges and corners, which seriously affects its performance. The medium and high temperature strength, corrosion resistance and thermal shock resistance are poor, and the service life is greatly shortened. If it is not replaced in time, it may even cause the electric arc furnace cover to collapse, seriously affecting the arc. The normal production and operation of the furnace, this problem needs to be solved urgently

Images