Baking-free ramming mass for blast furnace iron runners

Abstract

The invention discloses a baking-free ramming mass for blast furnace iron runners. The baking-free ramming mass for blast furnace iron runners is mainly prepared from the following raw materials in percentage by weight: 10-15% of 0-1mm bauxite, 12-18% of 1-3mm bauxite, 15-20% of 3-5mm bauxite, 18-23% of brown fused alumina, 10-15% of silicon carbide, 8-10% of modified asphalt, 7-10% of phenolic resin, 2-3% of urotropine and 1-2% of spodumene powder. The baking-free ramming mass product has the advantages of favorable oxidation resistance, higher thermal shock resistance, higher erosion resistance and compact structure. When in use, the product has favorable combination effect and higher sintering strength. The baking-free ramming mass is easy for construction, has high repair efficiency, and saves the time.

Description

Technical field [0001] The present invention involves the field of refractory materials technology, and specifically involves a kind of iron -kept furnace out of iron. Background technique [0002] The iron gutter out of the blast furnace is a channel repeatedly flowing out of the high -temperature iron or slag from the blast furnace. It is mainly composed of the main iron ditch, the bracket ditch, the slag ditch, and the slag skimmer.EssenceTherefore, this material is one of the most important parts of ironmaking production. [0003] The melting temperature formed in the smelting process of the vanadium titanium magnetite is high, and the melting temperature of titanium -containing dregs is high. It is generally 1380 to 1450 ° C within the possible alkaline range, which is about 100 ° C higher than the ordinary blast furnace residue, and the viscosity at high temperature is very viscousLow, generally only 0.1 ~ 0.2Pa · s; the residue is very crystallized, from good liquidity to ...

AI Technical Summary

Problems solved by technology

During the tapping process, the viscosity of titanium-containing blast furnace slag increases rapidly with the decrease of temperature, and it is easy to adhere to the refractory material after the temperature drops; Al in the refractory material 2 o 3 Dissolving in the slag will cause the viscosity of the slag to increase, and the flow rate will slow down to make the slag easy to adhere; in addition, the slag reacts with the refractory material to form a high-melting point mineral phase, which makes it difficult to re-dissolve the adhered slag, and the more it is on the iron trench. thicker

Therefore, the workload of slag cleaning in front of the furnace is very large. At the same time, improper slag cleaning operation shortens the life of the iron channel material, resulting in low iron flow, repeated trench repairs, and high labor intensity for workers.