Jointing material for ladle nozzle brick cups

Abstract

The invention discloses a jointing material for ladle nozzle brick cups, which is prepared from the following components in parts by weight: 1 part of adhesive, 0.4-0.9 part of curing agent, 1.8-2.4 part of powder, 0.2-0.6 part of modifier and 1.8-2.4 parts of diluter. The powder comprises the following components in parts by weight: 1 part of magnesite, 0.5-1 part of graphite, 0.3-0.6 part of silicon carbide and 0.3-0.6 part of magnesia alumina spinel. The product obtained by sintering the jointing material has the advantages of high volume density, low porosity and low possibility of bleed-out and seepage, and has excellent binding property, erosion resistance and mechanical properties at high temperature.

Description

technical field [0001] The invention relates to the technical field of high-temperature materials and metallurgy, in particular to a joint material for ladle nozzle seat bricks. Background technique [0002] Efficient, safe and intensive production is the development direction of the metallurgical industry, and it is also an important technical means to improve the survival, development and market competitiveness of high temperature resistant material enterprises. The nozzle block is a relatively special high-temperature-resistant material in the overall system of the ladle furnace. It is the necessary channel for the conversion of molten steel in ladle metallurgy. It is in direct contact with molten steel during tapping, and the temperature reaches 1600 degrees Celsius. At present, the nozzle block bricks used are divided into two types: integral type and split type. Integral seat bricks are widely used because of their good integrity during use. However, for large and me...

AI Technical Summary

Problems solved by technology

Commonly used joint materials use clay as a binder, add admixtures, and add a certain amount of water to prepare a paste-like slurry for use. However, the clay will produce more pores under the repeated high and low temperature alternating action, resulting in leakage and penetration of steel. The occurrence of the phenomenon leads to a shorter service life and seriously affects production safety.

In order to improve the safety and mechanical properties of use, in recent years, corundum, corundum and chromium oxide green have been gradually added as the main powder to prepare joint materials, but to a certain extent, the high temperature resistance and corrosion resistance of joint materials have also been improved. Here comes chromium pollution, wreaking havoc on the environment

The binders of the above two common joint materials contain inorganic water. After burning at high temperature, the water volatilizes or a small amount of liquid phase is formed at high temperature and shrinks, which makes more pores in the bonding parts of the joint material, so that it is easier to make the split type The bricks are cracked and separated, which reduces the service life of the bricks

Chinese patent CN 102875176 B discloses a refractory mud for silicon carbide-carbon composite bricks and its preparation method. In this paper, furan resin and furfuryl alcohol are mixed as an organic binder, which effectively reduces the disadvantage of leaving more pores after the volatile content of the binder is removed. However, the cohesiveness, erosion resistance and mechanical strength of this kind of refractory mud are all reduced when the temperature is above 1600°C, so it is not suitable for the high temperature environment in steelmaking

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