Nanometer material contained ladle bottom argon blowing permeable brick and preparation process thereof

Abstract

The invention discloses a nanometer material contained ladle bottom argon blowing permeable brick and a preparation process thereof. The permeable brick comprises components of high-purity corundum, spinel, alpha-Al2O3 micro powders, nano calcium carbonate, Si powders, binding agents and antiknock agents. The preparation process of the nanometer material contained ladle bottom argon blowing permeable brick includes the following steps of dosing, fine powder premixing, stirring, vibration forming, curing with molds, demolding, drying and baking. According to the nanometer material contained ladle bottom argon blowing permeable brick and the preparation process thereof, Cr2O3 is not used, and during usage, new pollutants are not generated, so that pollution treatment costs are reduced, and high environmental benefits are achieved; micropores are evenly distributed in the brick, so that cracks are effectively prevented from continuing spreading during usage, the toughness of the permeable brick is improved, the spalling is reduced, the service life of the permeable brick is prolonged, the permeable brick is basically free from bonding slag after usage, cleaning during usage is reduced, and production costs of iron and steel enterprises are reduced.

Description

Technical field [0001] The invention relates to the technical field of refractory materials, in particular to a argon-blown gas-permeable brick at the bottom of a ladle containing nano materials and a preparation process thereof. Background technique [0002] With the rapid development of my country's steel industry, it has also led to the rise of my country's refractory industry. my country's refractory production and consumption have been ranked first in the world for many years. It is a large producer, consumer and exporter of refractory materials, accounting for the world's total refractory output. More than 50%. Data shows that in recent years, the growth rate of refractory production in my country has exceeded 20%, the growth rate of sales revenue has exceeded 30%, and the growth rate of total profits has exceeded 30%. [0003] In the past 10 years, China's steel production has maintained a steady growth at a relatively rapid rate. According to statistics, the national steel...

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Problems solved by technology

[0014] (1) During the use of traditional permeable bricks, due to the rapid change of the use temperature, problems such as peeling and falling blocks are prone to occur; some even break during use, resulting in unsmooth blowing of argon, and serious leaks of molten steel

No matter the air blowing is not smooth or the molten steel leaks, it will seriously affect the normal smelting of the steel plant and cause losses to varying degrees. Therefore, it is very necessary to solve problems such as peeling, falling blocks, and fractures of the ventilating bricks.

[0015] (2) At present, the corundum-spinel air permeable bricks commonly used in China are prone to volume expansion in high-temperature environments due to their own characteristics. Once the air-permeable seam design is unreasonable, air blowing will not be smooth due to expansion. Phenomenon, so that some or all of the ventilation bricks lose the ventilation function

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