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Method for changing refractory brick at tapping hole of direct current electric arc furnace

A technology of DC electric arc furnace and replacement method, which is applied in the direction of lining repair, etc. It can solve the problems that the closed DC electric arc furnace cannot be used and the melt can not be evacuated, and achieve the effect of short replacement time

Inactive Publication Date: 2012-03-21
YUNNAN METALLURGICAL XINLI TITANIUM IND CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is a large amount of melt in the closed DC electric arc furnace, it is impossible to empty the melt in the furnace
The general replacement method is not suitable for the closed DC arc furnace

Method used

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  • Method for changing refractory brick at tapping hole of direct current electric arc furnace
  • Method for changing refractory brick at tapping hole of direct current electric arc furnace

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Embodiment Construction

[0012] A method for replacing refractory bricks at the iron gate of a DC electric arc furnace, the steps of the invention are:

[0013] (1) Stop feeding the furnace for heat preservation; (2) Drain the molten iron above the tap hole; (3) Clean up the outermost castable ① of the tap hole; (4) Shut down the furnace; (5) Remove the damaged refractory brick ②; (6) Build new refractory materials; (7) Restore the outermost castable ① of the iron gate; (8) Start the furnace and resume production.

[0014] Wherein: step (2) discharges the molten iron above the taphole, without emptying the melt in the furnace, only needs to empty the molten iron above the taphole.

[0015] Step (4) shut down the furnace, because the replacement time is short, there is no need to shut down the furnace for a long time.

[0016] Step (8) Start the furnace, because the replacement time is short and the temperature in the furnace will not be too low, so there is no need to carry out long-term temperature...

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Abstract

The invention discloses a method for changing a refractory brick at a tapping hole of a direct current electric arc furnace. The method comprises the following steps of: (1) stopping feeding a material into the furnace and preserving heat; (2) discharging molten iron above the tapping hole; (3) clearing the outermost casting material of the tapping hole; (4) stopping the furnace; (5) detaching the damaged refractory brick; (6) building a new refractory material; and (7) starting the furnace to recover production. According to the method, the damaged refractory brick at the tapping hole is discovered by observation and analysis, the furnace is stopped after a large amount of molten iron higher than the tapping hole is discharged, the damaged refractory brick is detached, and the refractory brick is newly built. Compared with a common changing method, the method has the advantages that: the slag in the furnace does not need to be emptied, the repair time is relatively short, the changing method is simple and convenient and the like, and the method is relatively practical in the field of metallurgy.

Description

technical field [0001] The invention discloses a novel method for replacing refractory bricks at the iron gate of a closed DC electric arc furnace, which is applicable to the technical field of the method for replacing the fire bricks at the iron gate of the novel closed direct current electric arc furnace for smelting titanium slag. Background technique [0002] At present, there are open type, semi-closed type and closed type electric furnaces for industrial production of titanium slag. The smelting process of the former two belongs to batch type, and the smelting process of high titanium slag in closed DC electric arc furnace is continuous production. Regardless of whether it is an open type, a semi-closed type or a closed type, the refractory bricks for the iron row are extremely easy to damage. Replacing the refractory bricks of the iron discharge port with the general method not only needs to empty the melt in the furnace, but also needs to shut down the furnace for a ...

Claims

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Application Information

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IPC IPC(8): F27D1/16
Inventor 刘平邹捷文建华刘建良龙坤黄栓保
Owner YUNNAN METALLURGICAL XINLI TITANIUM IND CO LTD
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