Construction method for replacing intermediate furnace body of blast furnace

Abstract

The invention discloses a construction method for replacing an intermediate furnace body of a blast furnace. Only the damaged intermediate furnace body is integrally dismounted and mounted. The construction method for replacing the intermediate furnace body of the blast furnace comprises the following steps of: a, carrying out load checking calculation and examination on a blast furnace frame; b,reinforcing an upper furnace body structure with a damaged furnace body on the blast furnace frame; c, arranging a feed / discharge door on the upper furnace body structure with the damaged furnace body and arranging hoisting devices inside and outside the furnace body at the feed / discharge door; d, dismounting a damaged furnace shell and cooling equipment by using the hoisting devices; e, mountinga new furnace shell and cooling equipment by using the hoisting devices; and f, dismounting the hoisting devices in the step b and closing the feed / discharge door. The device weight above the damagedfurnace body can be borne by the blast furnace frame so that only the damaged intermediate furnace body part can be dismounted and mounted in the dismounting and mounting processes, the overhaul investment of the blast furnace can be greatly decreased, the engineering cost is decreased, and the overhaul period is effectively shortened.

Description

technical field [0001] The inventor relates to a construction method for replacing a furnace body, in particular to a construction method for replacing a furnace body in the middle section of a blast furnace. Background technique [0002] At present, in the ironmaking production process, due to the influence of the production process, the cooling equipment in the middle section of the blast furnace body (that is, the blast furnace body) is first damaged, which causes the furnace shell in this area to be damaged by the high temperature, and eventually causes the blast furnace The production is unsafe and the blast furnace shell and cooling equipment have to be replaced and overhauled. Conventionally, the general process for the replacement and maintenance of blast furnace cooling equipment and furnace shells is to dismantle the furnace shells and cooling equipment from top to bottom to below the damaged position, and then reinstall new furnace shells and cooling equipment Wa...

AI Technical Summary

Problems solved by technology

[0003] Since the blast furnace cooling equipment and the damaged part of the furnace shell are located in the middle of the furnace body, if the conventional maintenance process is used to replace it, it is necessary to destroy the undamaged furnace shell, furnace body steel bricks, upper cooling equipment, refractory materials, etc., and reprocess and install them. This will inevitably lead to waste of engineering costs and extension of construction period.

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