Equipment and method for rapid repair of refractory brick falling off in cross section of blast furnace hot air duct

Abstract

The invention belongs to the technical field of metallurgical equipment, and in particular discloses rapid blast furnace hot-air pipeline cross section refractory brick dropping repairing equipment and method, being applicable to rapid repairing of dropping and damage of refractory bricks inside cross position pipelines of blast furnace hot-air pipelines, hybrid wind tubes, hot-air branch tubes, surrounding tubes and the like under working conditions such as thermal shock. A hybrid wind tube mold consists of a bent tube section mold, a splicing section mold and a main tube hanging mold, wherein a bent tube section is firstly prefabricated and a splicing section is secondly cast, and the bent tube section and the splicing section are integrally welded by using a splicing method, so that the construction difficulty is greatly alleviated, the repairing working period is greatly shortened to be 3-4 days, and furthermore the time for stopping the furnace is shortened and the cost is lowered; anchor rivets are arranged inside the bent tube section mold, the anchor rivets are Y-shaped, and the opening angle is 120 degrees; a plurality of anchor rivets are arranged on the inner side of the bent tube section mold, and the anchor rivets are arranged in a grid-shaped structure. Due to the anchor rivets, a casting material can be firmly fixed, and the casting material is solid and durable after being condensed and formed, so that the service life is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of metallurgical equipment, in particular to a rapid repair device and method for refractory bricks falling off at the cross section of a blast furnace hot blast pipeline, which is suitable for refractory bricks in the crossing positions of blast furnace hot blast pipelines and air mixing pipes, hot blast branch pipes, surrounding pipes, etc. Rapid repair of masonry falling off and damage under thermal shock and other working conditions. Background technique [0002] As we all know, the blast furnace hot air pipeline for ironmaking blast furnace transports the hot air heated by the hot blast furnace, that is, hot air. The refractory bricks at the intersection with the branch pipe and inside the pipe elbow are prone to fall off during use. [0003] At present, the refractory materials of the hot air system pipelines of domestic hot blast stoves are all designed with refractory bricks. The difference is that ...

AI Technical Summary

Problems solved by technology

Once there is a problem with the hot air system, the general situation is to adopt grouting, digging and patching the shell, external water cooling and other methods to deal with it. The grouting method cannot completely fill the cracks or defects of the refractory masonry at the high temperature point. In severe cases, the grouting material will enter the pipeline. Inside or at the tuyere, serious blockages are caused and the entire hot air duct is scrapped; the outer shell is cut and plastered to repair, the repair area is large, and a lot of manpower is required. It needs to be shut down for 20-30 days for maintenance. All high-temperature resistant materials are removed and rebuilt. The maintenance cycle long and expensive

The external water cooling method can not completely cover the reddened area, but can only partially relieve the reddened phenomenon, and cannot fundamentally solve the problem. At the same time, the cooling water consumption is large, and a large amount of hot steam will be generated, which poses a certain safety hazard

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