Novel homogenized stemming

Abstract

The invention discloses a novel homogenized stemming, which comprises the following components by mass ratio: 18-20 parts of brown aluminum oxide with a particle size of 1-3mm; 10-13 parts of brown aluminum oxide with a particle size of 3-5mm; 12-15 parts of brown aluminum oxide with a particle size of 5-8mm; 18-22 parts of brown aluminum oxide with a particle size of less than 1mm; 20-25 parts of bauxite homogenized grogs; 10-20 parts of silicon carbide micro-powder; 15-20 parts of clay; 2-5 parts of Al4SiC4 powder; 5-10 parts of ferro-silicon nitride; 5-10 parts of sericite; 8-15 parts of coke powder; and 10-25 parts of an environment-friendly composite binder. Compared with the prior art, the novel homogenized stemming provided by the invention has high normal temperature compressive strength and high temperature bending strength, also has more stable performance, and improves the slag corrosion resistance and molten iron scouring resistance.

Description

【Technical field】 [0001] The invention relates to the technical field of refractory materials, in particular to the technical field of a novel homogeneous blast clay. 【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 / cm3, ...

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, slag resistance, and molten iron resistance Scourability is also poor