Sand mouth material for blast furnace and preparation method for sand mouth material

Abstract

The invention relates to a sand mouth material for a blast furnace and a preparation method for the sand mouth material. The sand mouth material comprises the flowing components in percentage by weight: 15 to 20 percent of waste alumina-silica material of which the particle size is less than or equal to 0.088mm, 20 to 30 percent of quartz sand of which the particle size is 1 to 3mm, 10 to 20 percent of quartz sand of which the particle size is less than or equal to 0.088mm, 8 to 15 percent of clay powder of which the particle size is less than or equal to 0.074mm, 3 to 10 percent of asphalt of which the particle size is less than or equal to 1.0mm, 7 to 15 percent of coke powder of which the particle size is less than or equal to 2.0mm, 10 to 20 percent of waste iron runner material fine powder of which the particle size is less than or equal to 0.088mm, and 0.1 to 3 percent of sodium metasilicate nonahydrate. According to the sand mouth material, the production cost can be reduced by at least 20 percent, the compression strength is at least 10 Mpa, the breaking strength is at least 3Mpa, the service life can be prolonged from 8 to 48 hours, the used high-alumina bricks containing the alumina-silica material and the used iron runner materials can be utilized comprehensively, and the occupied areas of the used high-alumina bricks containing the alumina-silica material and the used iron runner material, and the recyclable resources are reduced.

Description

technical field [0001] The invention relates to a refractory material for blast furnace taphole and slag ditch repair and a preparation method thereof, and specifically belongs to a method of preparing blast furnace mud jacket, iron ditch and slag ditch repair mainly using waste aluminum-silicon refractory materials and waste iron ditch materials as part of raw materials Refractory material for maintenance and its preparation method. Background technique [0002] Blast furnace sand mouth mud is generally used for local maintenance of blast furnace sand mouth, mud jacket, slag ditch and iron ditch. The materials currently used are generally composed of quartz sand, clay powder, coke powder, asphalt, etc. Its shortcomings: the flexural strength is only no more than 0.5MPa, the compressive strength is no more than 5MPa, the use effect is poor, and the service cycle is short; for example, it takes 8 hours in a shift to make a mud cover for iron mouth shim, and the labor intensi...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the shortcomings of high production cost, low compressive and flexural strength, and short service life of the existing blast furnace sand mouth material, and provides a kind of material that can reduce the production cost by at least 20% compared with the current one, and the compressive strength is at least 10MPa. The flexural strength is at least 3MPa, and the use time of filling the iron hole can be increased from 8 hours to more than 2 days, and can make the discarded high-alumina bricks and iron trench materials containing aluminum-silicon materials comprehensively utilized. its preparation method

Images