A low-cost, high-life blast furnace taphole mud sleeve and its preparation method

Abstract

A low-cost, high-life blast furnace taphole mud sleeve and a preparation method thereof, the composition of which is calculated by weight percentage: regenerated Al with a particle size of 10-5mm 2 o 3 ‑SiC‑C raw material 25-40%; recycled high-alumina raw material with a particle size of 5-0mm 32-50%, silicon carbide powder with a particle size of ≤0.074mm 3-7%, mullite powder with a particle size of ≤10um 10-20%, High alumina cement 3-5%, heat-resistant stainless steel fiber 2-6%. When preparing the mud jacket, +5-8% of the total amount of dry powder is added to the water, vibrated in the mold for molding, after normal temperature curing, demoulding, and baking at 500-700°C for 12-24 hours, the prefabricated mud jacket is the finished product. It can be directly installed and used during application without further baking. The mud jacket made by the invention has low cost and excellent comprehensive performance: high strength, good toughness, good thermal shock resistance and good stability. It is convenient, safe, efficient and reliable in application, and its service life has been increased by more than 2 times than before.

Description

technical field [0001] The invention relates to the field of refractory materials for ironmaking technology, in particular to a low-cost, high-life blast furnace tap hole mud sleeve and a preparation method thereof. Background technique [0002] Cleaning slag and iron is the main task of blast furnace front work. Leakage of gas in the taphole area affects tapping, making the taphole prone to splashing or polluting the environment, endangering the safety of workers. The iron nozzle mud sleeve is the end face where the iron nozzle contacts the mud gun, and the mud sleeve is required to be complete, and the gun head and the mud sleeve are closely matched when the mouth is blocked. In the actual tapping operation, if the quality of the mud sleeve is not good, it will cause mud to emerge when the hole is blocked, and the iron hole will splash, and even cause the blast furnace to reduce the wind and stop the wind to block the hole, thereby affecting the normal operation of the iro...

AI Technical Summary

Problems solved by technology

The cost of materials used in this technology is very high, but it has not achieved the expected high life. This is related to the need for online construction of the material on site, which actually reduces the physical and technical performance of the mud sleeve.

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