Aluminum magnesium carbon sliding plate brick for stopping slag at steel tapping hole of converter

Abstract

The invention relates to an aluminum magnesium carbon sliding plate brick for stopping slag at a steel tapping hole of a converter. The sliding plate brick is characterized by comprising the following components in parts by weight: 70-90 parts of sintered or electric smelting magnesia, 10-30 parts of sintered or electric smelting magnalium spinel, 5-15 parts of metal Al, 1-5 parts of carbon material, 0.5-4.0 parts of antioxidant and 20-30 parts of phenolic resin. Compared with the prior art, the sliding plate brick provided by the invention has the beneficial effects that the magnesia and magnalium spinel are introduced in a formula, thereby improving erosion resisting property and slag resisting property of the sliding plate and maintaining reasonable thermal shock stability; a network structure is formed by fusing and sintering the metal Al and carbonizing of the phenolic resin, thus the bonding strength of the sliding plate is greatly improved, the cracks of the sliding plate caused by thermal shock are reduced, the high-temperature comprehensive property of the sliding plate can be obviously improved, the service life of the sliding plate is prolonged, the reliable guarantee on quality products and use performance is provided for a technology of stopping slag at a sliding water gap of a converter, and the efficiency of stopping the slag of the converter is improved.

Description

technical field [0001] The invention relates to the field of converter refractory materials, in particular to an aluminum-magnesium carbon sliding brick for slag blocking at a tap hole of a converter. Background technique [0002] At present, the development trend of converter tapping slag blocking technology at home and abroad is the sliding nozzle slag blocking technology with higher slag blocking efficiency. Its working principle is to slide the upper and lower plate bricks relative to each other through the sliding mechanism, so as to drive the opening and closing of the tapping hole to adjust the flow of molten steel, control the amount of steel slag entering the molten steel, and ensure the quality of molten steel. As an important functional part of the sliding nozzle system, the slide plate is required to have excellent high temperature strength, thermal shock stability, corrosion resistance and oxidation resistance in order to obtain a higher service life and a stabl...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an aluminum-magnesium-carbon sliding brick for slag blocking at the taphole of a converter, which solves the problems of insufficient compactness, poor bonding

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