Method for processing and building overhauling working lining bricks of vertical type vacuum refining furnace hearth

Abstract

The invention discloses a method for processing and building overhauling working lining bricks of a vertical type vacuum refining furnace hearth and belongs to the technical field of metallurgical furnaces. The method comprises the following steps of: pausing when building working lining bricks (5) to third or fourth working lining bricks far from locking bricks, and accurately measuring a height dimension (1) between an elevation position below 10 to 15 mm of a horizontal elevation of the plane of a flange (2) and the upper end of locking bricks (3); setting the third or fourth working lining bricks far away from the locking bricks as cut working lining bricks (4), and cutting the cut working lining bricks (4) by the height dimension (1) on a brick cutter; and directly building the cut working lining brick (4), the second working lining bricks (5) far away from the locking bricks, and the locking bricks (3) till completing the overhauling of the working lining bricks of the hearth. The method has the advantages of avoiding processing of the locking bricks during medium repair, effectively simplifying construction procedure, greatly lightening the workload of labors and improving working efficiency, along with relatively small workload.

Description

Technical field [0001] The invention belongs to the technical field of metallurgical furnaces, and in particular relates to a method for processing and masonry of working layer bricks when the bottom of a vertical vacuum refining furnace is fully repaired or overhauled. Background technique [0002] RH vacuum refining technology was originally jointly developed by Ruhrstahl and Heraeus. It is also called cyclic degassing in my country. RH vacuum furnace is generally composed of three parts at the bottom, middle and top. It has a vertical structure and is mainly used for the refining process outside the furnace in the iron and steel metallurgy industry. The metallurgical principle is to rely on the pressure difference to elevate the molten steel to vacuum suffocation, and to cause the molten steel to circulate by blowing Ar to achieve the removal of C and N 2 , H 2 The purpose of O: Add a certain amount of alloy in the later stage of smelting to fine-tune the composition of molten...

AI Technical Summary

Problems solved by technology

The disadvantages of this method of overhauling and masonry are: the number of lock bricks 2GG10 and 2GG16 is large (117 pieces in one ring), and the workload of processing bricks is relatively large; at the same time, the lock must be changed every time overhaul Bricks also need to be processed repeatedly (there are two intermediate repairs between the two overhauls), which increases the labor intensity of workers and affects work efficiency

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