A long-term corrosion-resistant and maintenance-free converter body-bottom seam construction method and its structure

Abstract

The invention discloses a method for constructing a long-lasting anti-corrosion maintenance-free joint between a converter body and a converter bottom and a structure of the joint. The method comprises the consecutive steps of foundation treatment, bottom net laying, temperature resistance treatment and joint shaping, particularly, firstly, the surface of the converter bottom is cleared; secondly, a foundational fireproof material is laid and the surface treatment is performed according to the technological requirements; finally, a layer of anti-corrosion fixed rib net is laid and fixed on a foundational fireproof material. The structure comprises fixed ribs and a high temperature resistant filler, wherein the fixed ribs are arranged in the seam of the converter body and the converter bottom, and the high temperature filler is poured and arranged between the fastening rib and the seam to form an overall high temperature joint filling layer. According to the invention, the fireproof material is improved in performance of high temperature resistance, erosion resistance and fireproof material adhesion, a synchronous effect on sustaining the service life of the converter bottom seam and the service life of a converter is achieved, as a result, the maintenance frequency is greatly lowered, the effects on energy conservation and effect increment are remarkably improved, the safety and reliability of the converter are improved. The method and the structure have the advantages that the manufacturing cost is low, the work is reliable, and the operation is simple and easy.

Description

technical field [0001] The invention belongs to the technical field of converter furnace construction, and in particular relates to a method for building joints between the furnace body and furnace bottom of a converter with low cost, reliable operation, simple and easy operation, long-term corrosion resistance and maintenance-free maintenance. Background technique [0002] The converter body consists of a furnace shell and a furnace lining. The furnace shell is welded by steel plates, and the furnace lining is composed of three parts: working layer, permanent layer and filling layer. The working layer is in direct contact with the liquid metal, slag and furnace gas in the furnace, and is easily corroded. It is usually built with magnesia carbon bricks in China. The permanent layer is close to the furnace shell to protect the steel plate of the furnace shell, and the permanent layer may not be removed when the furnace is repaired. A filling layer is set between the permane...

AI Technical Summary

Problems solved by technology

When the furnace age reaches more than 6000 furnaces, it must be completely repaired; at the same time, the curing effect is not good at some parts of the joints, which may easily cause the accident of molten steel passing through the joints of the bottom of the furnace

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