A kind of blast furnace dam material and its preparation and dam building method

Abstract

The invention provides a blast furnace dam material. The blast furnace dam material is prepared from, by weight, 26-35 parts of fused magnesite, 22-28 parts of crystalline flake graphite, 30-36 parts of heavy calcium powder, 2-5 parts of zircon sand, 3-5 parts of silicon carbide micro-powder, 2-4 parts of oil wetting agent, 1-3 parts of heat stabilizer and 2-4 parts of water. According to the scheme, the defects of traditional blast furnace iron runner and slag runner damming materials are effectively overcome, the defects that the traditional damming materials are poor in forming property, prone to iron seepage, dam collapse, iron running and overall sintering and not resistant to scouring or corrosion, so that later dam poking is affected are compressively overcome, and tapping production of a blast furnace is greatly stabilized; labor intensity and the production cost are greatly reduced, production safety of the blast furnace is powerfully guaranteed, and the blast furnace dam material is wide in market space and huge in promotional value.

Description

Technical field: [0001] The invention relates to the technical field of metallurgy and ironmaking, in particular to the blast furnace dam material used for damming the iron ditch and slag ditch in the main ditch area of ​​molten iron in an ironmaking blast furnace casthouse and the corresponding application technology. Background technique: [0002] At present, the large-scale blast furnace and high-strength smelting of blast furnace have become the development trend of the industry. The temperature of molten iron is high when tapping, the amount of iron slag is large, and the time for tapping and slag is long, which leads to extremely harsh conditions for the use of tapping channel refractories. Especially in recent years, the transformation, application and comprehensive promotion of the iron storage type tapping trough have put forward new requirements for the use of blast furnace dam materials. [0003] The working environment of the main tapping channel of the blast fur...

AI Technical Summary

Problems solved by technology

[0003] The working environment of the main tapping channel of the blast furnace is harsh. After the taphole is opened, the amount of slag and iron is large, the temperature is high, and the corrosion is strong. In order to effectively stratify the slag and iron according to their own density, the iron storage type tapping channel must reach The discharge begins only after a certain capacity, and the slag-iron capacity drop of the main ditch is high and the pressure is extremely high. Traditional dam-building materials can no longer meet the production requirements. Production accidents such as dam body seepage, premature dam collapse, and run-off of iron often occur, which affects the stability of production. Shun and safety have caused major hidden dangers

[0004] The disadvantages of the traditional iron ditch dam building materials are very obvious under the current blast furnace production process, and they cannot be synchronized with the blast furnace production at all. During the slag discharge stage, the dam cannot be poked manually in time, and the thermal shock resistance, erosion resistance, and corrosion resistance for a long time are poor, and dam collapse and dam washing are prone to occur, which cannot meet the production requirements