Hot scarfer

Abstract

A steel-slab-use hot scarfer constituted by arranging side by side a plurality of scarfer units each comprising an upper block and a lower block provided with fuel gas jetting ports, an oxygen passage provided between the upper block and the lower block, and shoes mounted on the lower block, wherein the positions of between-shoe contact surfaces formed between adjacent shoes are deviated sidewaysfrom the positions of between-lower-block contact surfaces formed between adjacent lower blocks to thereby prevent oxygen passing through oxygen passages from leaking from between the contact surfaces, whereby the deterioration of the surface profile caused by slag occurrence due to abnormal combustion can be prevented.

Description

technical field [0001] The invention relates to a flame cleaning machine for hot-rolled pieces used for flame cleaning and repairing the surface of a steel plate by using high-temperature combustion gas. Background technique [0002] The flame cleaning machine for hot-rolled parts is a maintenance device for steel slabs (hereinafter referred to as "slabs"), such as Figure 6 , 7 As shown, they are arranged in pairs on the upper side and the lower side of the slab. Each hot-rolled piece flame-cleaning machine adopts a structure in which a plurality of flame-cleaning units 1 are arranged to cover the entire width of the slab along the transverse direction (hereinafter referred to as the transverse direction refers to the width direction of the slab passing through the hot-rolled piece flame-cleaning machine). [0003] Figure 6 In the hot-rolled piece flame cleaning machine shown, five flame cleaning units 1 are arranged in a horizontal row. The main structure of the flame c...

AI Technical Summary

Problems solved by technology

[0010] However, in order to flame-clean the surface of the slab, the hot-rolled piece flame-cleaning machine not only becomes high temperature, but also the end of the flame-cleaning unit is easily deformed due to expansion and contraction caused by repeated heating and cooling, or the refractory material also falls off Many, so the reality is that the effect of suppressing the expansion of the inter-unit gap 6 on the slab side is almost non-existent

[0011] In addition, there is a plan to integrate the flame cleaning unit 1 as a whole, but it is unrealistic to replace the entirety due to ablation of a part, and a large amount of manpower and cost are required for its manufacture, transportation, and installation.

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