Method for repairing skimmer online

Abstract

The invention discloses a method for repairing a skimmer online, and belongs to the field of blast furnace smelting. The method comprises the steps that the liquid face in a main groove is adjusted tobe below the bottom of a cross beam of a skimmer by a preset distance, so that operation between the top of the cross beam and the liquid face is reserved; a heat preservation layer for preserving heat of molten iron in the main groove to prevent the molten iron from solidifying is laid on the liquid face; a constraint part attached to the cross beam to be fixed is arranged in the operation space, and the constraint part provides a repairing clearance for containing the damaged area of the cross beam at least; the repairing clearance of the constraint part is filled with repairing materials,the repairing materials are tamped and compacted, the repairing materials are in contact with the cross beam and partially cover the damaged area at least, and a regenerated body is formed; and afterthe regenerated body meets selected repairing conditions, the constraint part is removed. According to the method, online repairing of the skimmer can be fast completed, implementation is easy, and therefore the labor intensity of an operator can be reduced by means of the method.

Description

technical field [0001] The present application relates to the field of blast furnace smelting, in particular, to a method for repairing a skimmer online. Background technique [0002] Skimmer is one of the key equipment in front of blast furnace. The skimmer is usually installed between the blast furnace iron storage main ditch and the long ditch to realize the separation of slag and iron in the process of blast furnace slag iron extraction to ensure the quality of molten iron. [0003] The principle of separating slag and iron by the skimmer in the process of slag iron removal is as follows: [0004] Since the density of molten iron is different from that of slag, the slag with low density will be isolated in the upper layer. The lower slag ditch that flows into the iron storage type main ditch end equipment is mixed with high temperature and high pressure slag flushing water and quenched into the slag pool. Due to the high density of molten iron, it sinks into the lower...

AI Technical Summary

Problems solved by technology

However, the use conditions of this mold are harsh, the use cost is high, and the online maintenance of the skimmer cannot be completed substantially, and ditch stop operation is still required

Specifically, the mold can repair the scoured part at the bottom of the skimmer beam, but cannot repair the gap of the scoured damaged part in the middle of the skimmer beam

Also, the slideway in its mold is limited and can only move according to the width of the beam, not the height of the beam

If the skimmer beam washout is thinned, the mold cannot be fully repaired

Moreover, the mold is powerless to repair the deep gap in the middle of the skimmer beam

In essence, this mold is only suitable for the case where a small area at the bottom of the beam of the skimmer is scoured, and the local depth of the bottom of the beam is not enough, but it does not have the function of online repair

This skimmer is not suitable for on-line repairs where there is molten iron in the iron storage main ditch

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