Corundum-zirconia corundum-titanic acid aluminum no-firing no-soaking sliding brick and preparation method thereof

Abstract

The invention discloses a corundum-zirconia corundum-titanic acid aluminum no-firing no-soaking sliding brick and a preparation method thereof. The sliding brick is composed of, by weight, 40-55 parts of tabular corundum, 15-25 parts of zirconia corundum, 10-15 parts of titanic acid aluminum, 6-10 parts of spherical calcined alumina, 5-8 parts of metal aluminum powder, 1-2 parts of high-temperature asphalt powder, 1-2 parts of silicon ash, 1-2 parts of antioxidants and 3-5 parts of phenolic resin. According to the corundum-zirconia corundum-titanic acid aluminum no-firing no-soaking sliding brick and the preparation method thereof, the raw materials of the tabular corundum, the zirconia corundum and the titanic acid aluminum are added into the formula, the coefficient of thermal expansion of the material of the sliding brick can be obviously decreased, and the thermal shock stability, the erosion resistance and the slag resistance of the sliding brick are improved; selection and adding amount of the high-temperature asphalt powder, spherical calcined alumina powder and the silicon ash are controlled, and the reasonable strength of the sliding brick in the low-temperature, medium-temperature and high-temperature stages can be achieved; the thermal expansion difference caused by the thermal stress of the temperature difference between inside and outside of the hole diameter of cast steel when the product is used is improved, the crack number is decreased; and the high-temperature comprehensive performance of the sliding brick is remarkably improved, and the service life of the sliding brick is prolonged.

Description

technical field [0001] The invention relates to the field of flow-controlling refractory materials for ladle metallurgy, in particular to a corundum-zirconium corundum-aluminum titanate non-burning and non-impregnating sliding brick for ordinary steel and a preparation method thereof. Background technique [0002] At present, the aluminum-carbon and aluminum-zirconium carbon sliding plates commonly used in ladle metallurgy flow control at home and abroad can meet the service life requirements of ordinary steel types, and the use state is stable; ≥1400℃), and after the firing process, it is necessary to continue the asphalt oil immersion roasting process to improve the oxidation resistance, chemical corrosion resistance, slag resistance and other properties of the slide. The overall production process is relatively complicated and consumes a lot of energy. It is not conducive to the energy saving and environmental protection control requirements of skateboard production, whic...

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Problems solved by technology

[0002] At present, the aluminum-carbon and aluminum-zirconium carbon sliding plates commonly used in ladle metallurgy flow control at home and abroad can meet the service life requirements of ordinary steel types, and the use state is stable; ≥1400℃), and after the firing process, it is necessary to continue the asphalt oil immersion roasting process to improve the oxidation resistance, chemical corrosion resistance, slag resistance and other properties of the slide. The overall production process is relatively complicated and consumes a lot of energy. It is not conducive to the energy saving and environmental protection control requirements of skateboard production, which increases the production cost of skateboards, and the economic benefits of products and manufacturers are restricted

However, ordinary aluminum-carbon or aluminum-zirconium-carbon skateboards that adopt the non-burning and non-immersing process have significantly reduced medium-temperature strength due to decarburization and oxidation of the phenolic resin at about 600-650 ° C, and the metal aluminum has not yet melted to form a bonding strength at this time, resulting in The anti-melting performance of the sliding plate fluctuates greatly, which is one of the most important factors restricting the multiple use and comprehensive promotion of the non-burning and non-immersing sliding plate in large-tonnage ladles (>200 tons); at the same time, due to the obvious During use, the uneven thermal expansion caused by thermal stress will easily lead to cracks, oxidation of the board surface, weakened wear resistance, and further increase of thermal melting loss, which greatly limits the service life and stability of the skateboard.

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