Metal ceramic combination sintering free low carbon sliding plate brick and preparation method thereof

Abstract

The invention discloses a metal ceramic combination sintering free low carbon sliding plate brick and a preparation method thereof. The sliding plate brick comprises the following components according to weight percentage: 50%-60% of sintered plate shape alundum, 10%-25% of electric melting akerite, 5%-15% of electric melting mullite, 1%-3% of soot carbon, 3%-8% of Alpha- aluminum oxide micropowder, 5%-10% of silicon carbide, 2%-5% of metallic silicon powder,1%-5% of metallic aluminium powder, 0.5%-1% of boron carbide, 1%-3% of aluminum-silicon alloy powder, and 0.5%-2% of metallic aluminium fiber. In the invention, the product has low carbon, high thermal state strength, thermal shock resistance and good oxidation resistance, hole reaming is uniform, galling is less and the crack is verysmall; the process of the invention is characterized in that drying is carried out at a low temperature, the production cycle is shortened from 30 days originally to 7 days, the natural gas consumption is reduced to 2.5% of original technology, and the sintering free low carbon sliding plate brick is indeed belongs to the environmental protective and energy-saving and environmental material resistance product.

Description

technical field [0001] The invention belongs to the field of inorganic non-metal refractory materials based on alumina, magnesia and silicon dioxide, and in particular relates to a cermet-bonded non-fired low-carbon sliding brick and a preparation method thereof. Background technique [0002] 1. The sliding brick installed at the bottom of the ladle and tundish can control and adjust the flow of molten steel. It is not affected by the stirring of molten steel, the injection of flux and the residence time of molten steel, and is easy to operate. Continuous casting can be easily realized by using the sliding brick. Steel operation is automated, eliminating the impact of molten steel, slag residence time and pouring time on flow control. Sliding block is a control device for molten steel in the casting process of the continuous casting machine. It can precisely adjust the flow of molten steel from the ladle to the continuous casting tundish, so that the inflow and outflow of mo...

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Problems solved by technology

This production process not only consumes a lot of energy, the consumption of natural gas is as high as 1800 cubic meters per ton, but also a large amount of harmful substances are produced during impregnation, dry distillation and decoking of tar and asphalt, which has a great impact on the environment and human health; at the same time, the production cycle need a month

In contrast, the thermal shock resistance of aluminum-carbon and aluminum-zirconium carbon is better than that of aluminum-magnesium-carbon and aluminum-magnesium-zirconium carbon, but the corrosion resistance is reduced, especially when casting high-oxygen steel, high-manganese steel, and Ca-treated steel. , killed steel and other steel types, because the oxygen in the molten steel reacts with the carbon in the skateboard bricks, a metamorphic layer is formed due to oxidation and carbon loss, and the structure is loose, which is washed away by molten steel and damaged; the Al in the skateboard bricks 2 o 3 Reacts with FeO(MnO) in molten steel to form low-melting material, causing severe chemical corrosion

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