Slag adhesion preventing separant for stirring head and preparation method thereof

Abstract

The invention discloses a slag adhesion preventing separant for a stirring head and a preparation method thereof and solves the problem of slag adhesion of the stirring head. The slag adhesion preventing separant for the stirring head is prepared from the following raw materials in parts by weight: 55 to 75 parts of quartz powder, 5 to 15 parts of amorphous graphite, 5 to 15 parts of silicon carbide, 3 to 8 parts of clay, 0.5 to 2 parts of sodium carboxymethylcellulose, 1 to 3.5 parts of paper fiber and 0.03 to 0.15 parts of organic fiber. The prepared separant disclosed by the invention has the characteristics of good adhesion under a normal temperature, high low-temperature bonding strength, reduction or loss of high-temperature bonding strength and benefit to automatic falling off; theseparant can generate larger volume expansion or contraction along with temperature rise and fall, so that the separant is favorable for self crack generating and has an automatic structure collapsingeffect. When being applied to the surface of a refractory material of the KR stirring head, the separant has an effect of preventing slag adhesion; thus, labor intensity is reduced, and service lifeof the stirring head is improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to an anti-sticking slag release agent for a stirring head and a preparation method thereof. Background technique [0002] With the increasing development of various high-quality steels and special steels, the deep desulfurization technology of molten iron is also constantly researched and optimized. Among them, the KR stirring method has become the pretreatment method of molten iron with obvious advantages and widely used. However, during the use of the mixing head, the sticky slag and hanging slag of the mixing head become unfavorable factors. First, it is not easy to clean up slag after sticking. If manual slag removal is labor-intensive, the working environment is poor and high-temperature operation has great potential safety hazards. Second, if the slag is not cleaned in time, the uneven sticky slag will cause the center of the mixing head to rotate and shake, wh...

AI Technical Summary

Problems solved by technology

However, during the use of the mixing head, the sticky slag and hanging slag of the mixing head become unfavorable factors

First, it is not easy to clean up the slag after sticking. If the manual cleaning of slag is labor-intensive, the working environment is poor and high-temperature operation has great potential safety hazards

Second, if the slag is not cleaned in time, the uneven sticky slag will cause the center of the mixing head to rotate and shake, which will affect the service life of the mixing head and also pose a safety hazard

Third, when the slag line part of the mixing head sticks to the slag seriously, the diameter of the slag line part becomes larger, which affects the movement of the stirring head up and down at the round hole of the operation platform, and affects the normal production

In addition, after a lot of research and practical work, it is found that the desulfurization efficiency of the three-blade KR mixing head is higher than that of the four-blade mixing head, and the service life can also be greatly improved. The mixing head is more prone to eccentric rotation, which affects the service life, and also increases the load on the challenge mechanism, which has a large unsafe factor