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ProjectProducts have been widely used in steel, carbon, glass, cement, coking, building materials, non-ferrous and other industries, to meet the requirements of a variety of high-temperature furnace.
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ProductsThe company's main products are clay bricks, high alumina bricks, dense clay bricks, magnesia carbon bricks, high-strength insulation bricks. Special products include sintered corundum brick, corundum mullite brick, chrome corundum brick, etc., as well as various amorphous refractory materials and various refractory clay.
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AboutThe company started from refractory raw materials, in line with the business policy of integrity and win-win, customer first, relying on its own funds, rolling development, and has now developed into a modern refractory enterprise integrating scientific research, development, production and service.
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NewsProducts sell well in 31 domestic provinces and autonomous regions, and exported to Southeast Asia and other countries
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ContactIn case of product quality problems during the warranty period, we guarantee to deal with them in a timely manner. After the expiration of the warranty, we still provide after-sales service, only charge for materials. We promise to reply within 24 hours after receiving the call and arrive at the scene within 3 days.
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NEWS CENTER
Another use of waste refractory bricks
Release time:
Nov 09,2021
Heat-resistant concrete is a kind of special concrete that can withstand high temperature for a long time (above 200 ℃) and maintain the required physical and mechanical properties under high temperature. The heat-resistant concrete used in the lining of industrial kilns instead of refractory bricks is also called Refractory concrete. The cement used in this test is aluminate cement, because the chemical composition of the cement contains more Al₂ O₂, which has a higher sintering strength and refractoriness after sintering at about 1000 ℃ to produce ceramic bonding.
Heat-resistant concrete is a kind of special concrete that can withstand high temperature for a long time (above 200 ℃) and maintain the required physical and mechanical properties under high temperature. The heat-resistant concrete used in the lining of industrial kilns instead of refractory bricks is also called Refractory concrete. The cement used in this test is aluminate cement, because the chemical composition of the cement contains more Al₂ O₂, which has a higher sintering strength and refractoriness after sintering at about 1000 ℃ to produce ceramic bonding.
The main reason for the poor heat resistance of ordinary concrete is that the hydration product of some cement is Ca(OH), and calcium aluminate hydrate is dehydrated at high temperature, which destroys the structure of cement stone and leads to concrete fragmentation; another reason is that some commonly used aggregates, such as limestone and quartz sand, undergo large volume deformation at high temperature, and some aggregates decompose at high temperature, which leads to the destruction of ordinary concrete structure and the reduction of strength. Therefore, the aggregate is a key factor in the preparation of heat-resistant concrete, and the heat-resistant aggregate is a key factor in the preparation of heat-resistant concrete.
Admixture has two main functions: first, it can increase the compactness of concrete and reduce the deformation of concrete at high temperature; Second, when ordinary portland cement is used, Al Oover and SiO₂ in the admixture react with the dehydration product CaO of cement hydration product Ca(OH) to form anhydrous calcium silicate and anhydrous calcium aluminate with good heat resistance, while avoiding the volume change caused by dehydration of Ca(OH). Therefore, the admixture should be a material with a high melting point, no deformation at high temperature and containing a certain amount of Altoo.
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