Slag Hanging Method for Smelting Titanium Slag in Electric Furnace

Abstract

The invention provides a method for adhering slag onto an electric furnace for smelting titanium slag. The method comprises the following steps: with a low carbon ratio, adopting furnace burden and coke according to the ratio of 100:10 to form a molten pool quickly, controlling FeO to be more than or equal to 15% in slag, and controlling liquid-level temperature of titanium slag to be more than or equal to 1,720 DEG C; adding coke at the upper part of the molten pool according to 100-200 Kg / batch to enable the electrode to rise for 300-1,000 mm in position, after the electrode drops to the position before the coke is added, adding the coke again, and repeating the operation for 2-3 times; using multipoint charging at the edge of the molten pool in the molten pool section; adding the coke to the position, directly facing to the slag hole and iron notch of the molten pool, according to the ratio, in which, the coke is increased by 3-4% compared with that in the normal ratio, of the furnace burden to coke; adding the coke to other edge adding positions according to the ratio, in which, the coke is increased by 2-3% compared with that in the normal ratio, of the furnace burden to coke, wherein the normal ratio of the furnace burden to coke is 100:12, and the power transmission voltage is less than or equal to 320 V; controlling tapping temperature strictly; shortening refining time of grade adjustment at later stage at a high temperature.

Description

technical field [0001] The invention relates to the field of electric furnace smelting titanium slag, and more specifically, relates to a slag hanging method for electric furnace smelting titanium slag. Background technique [0002] Electric furnace smelting titanium slag is a systematic project. In order to increase the production capacity of the electric furnace, it is necessary to ensure that the electric furnace system is in the optimal working condition and maintain it in a timely manner. In addition to the power supply system, batching system, cooling water system, electrode control system, furnace gas treatment system, etc. of the electric furnace, the furnace lining must also be maintained. The furnace lining is the part of the electric furnace that directly contacts the titanium slag and molten iron, and the TiO in the titanium slag 2 The chemical activity at high temperature is extremely strong, and it can react with almost all refractory materials, thus corrodin...

AI Technical Summary

Problems solved by technology

[0006] The existing slag hanging process is to carry out the slag hanging operation by adding 200kg~300kg of coke each time in the smelting process. The actual slag hanging effect is poor. The slag layer in the molten pool section was damaged and bricks were seen on the upper part of the furnace wall

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