An environment-friendly sic-c composite heavy foam mud

Abstract

The invention discloses environmentally-friendly SiC-C composite heavy foamed mud. The environmentally-friendly SiC-C composite heavy foamed mud comprises the following components in parts by mass: 7-15 parts of brown fused alumina with the particle size of 1-3 mm, 3-10 parts of brown fused alumina with the particle size of 3-5 mm, 5-10 parts of brown fused alumina with the particle size of 5-8 mm, 10-15 parts of brown fused alumina with the particle size of less than 1 mm, 3-15 parts of alumina, 5-20 parts of silicon carbide micro powder, 15-20 parts of clay, 1-7 parts of Si-C powder, 4-8 parts of sericite, 5-16 parts of coke powder and 5-25 parts of environmental-friendly composite binding agent. The environmentally-friendly SiC-C composite heavy foamed mud has the beneficial effects that compared with conventional foamed mud, the environmentally-friendly SiC-C composite heavy foamed mud is higher in Al2O3 content, the compressive strength of the foamed mud can reach above 30Mpa, the breaking strength of the foamed mud can reach above 7Mpa, the compressive strength and the breaking strength of the foamed mud are improved, the consumption of the foamed mud is reduced, the erosion resistance and oxidation resistance of a foamed mud matrix are improved due to addition of SiC-C powder, and meanwhile, the strength of the foamed mud is not reduced.

Description

【Technical field】 [0001] The invention relates to the field of refractory material manufacturing, in particular to an environment-friendly SiC-C composite heavy foam mud. 【Background technique】 [0002] Large-scale blast furnaces in my country generally have one accidental slag outlet and 1 to 4 tapholes, and the amount of slag and iron discharged from the tapholes is large every day. In addition to the function of blocking the tap hole and stabilizing the tap, taphole mud is also endowed with the function of protecting the hearth and prolonging the life of the side bricks at the bottom of the blast furnace. Cracks, poor resistance to slag iron erosion and other shortcomings make it difficult to meet the needs. Anhydrous tapped clay generally uses corundum, silicon carbide combined with silicon nitride, coke powder, combined clay, etc. Anthracene oil, washing oil or tar is used as a binding agent, and the Al 2 o 3 The content is about 30%, the bulk density is about 1.8g / c...

AI Technical Summary

Problems solved by technology

In addition to the function of blocking the tap hole and stabilizing the tap, taphole mud is also endowed with the function of protecting the hearth and prolonging the life of the side bricks at the bottom of the blast furnace. Cracks, poor resistance to slag iron erosion and other shortcomings make it difficult to meet the needs. Anhydrous tapped clay generally uses corundum, silicon carbide combined with silicon nitride, coke powder, combined clay, etc. Anthracene oil, washing oil or tar is used as a binding agent, and the Al 2 o 3 The content is about 30%, the bulk density is about 1.8g / cm3, the compressive strength is about 15MPa, the flexural strength is about 4MPa, the compressive strength and flexural strength are poor, and its oxidation resistance and resistance to slag and iron erosion The performance is also poor. The most important thing is that this kind of clay has a large environmental pollution. A large amount of harmful gas will escape during production, which will affect the health of the operator. In cold winter conditions, the product is easy to harden, and the Masha value is low. baked, which brings inconvenience to the operation, and its production cost is relatively high