Improved convertor quick-sintering heat self-flow compensation material, preparing technology and use

Abstract

The invention discloses a kind of improved converter fast-burning heat-junction free-running patching material, its manufacture technology and application. Its features are: the patching percent by weight is one of the two followed: (1) MgO 75-85 Al2O3 1.0-2.0, whole carbon 4.0-12.0 Fe2O3 0.5-1.5 CaO 1.0-2.5, the remnant is SiO2; (2) Mg0 60-70 Al2O3 0.5-2.0, whole carbon 4.0-12.0 Fe2O3 0.3-1.0 CaO 10.0-20.0, the remnant is SiO2. Its manufacture technology is: firstly, to weigh according the above mixture ratio and then to put it in high-temperature bonding agent, high-temperature lacquer solvent, detonation suppression and anti-oxygen, then to intermix it homogeneously by the efficient mixing machine and to deliver it to junk machine by the band carrier to press compact, after all, press it to balls by the ball forming mill. The life span of the heat-junction free-running patching material this invention offers is the time for 30-50 furnaces, and the time for sintering is lowed to 10-25 minutes. It has the merits of good heat flow, high bond strength, high erosion-resisting characteristics and anti osmosis and good sintering under low and middle temperature, and we have gotten good result in the 300-ton converter in Baogang steel works.

Description

technical field [0001] The invention relates to an improved quick-sintering hot self-flowing repair material for a converter, a production process and application, and belongs to the technical field of steelmaking slag splashing furnace protection and refractory materials. Background technique [0002] The technology of slag splashing to protect the furnace has been fully promoted on the converter, which has greatly improved the life of the lining and achieved significant economic benefits. However, the front face of the converter bears the double impact of molten iron and scrap; the rear face is subjected to the flow of molten steel during tapping; and the bottom of the furnace and the vicinity of the tap hole, etc., are easily damaged in advance due to harsh service conditions. For this reason, asphalt-bonded converter hot self-flowing repair materials are widely used. Most of them are made of various graded magnesia plus asphalt and other carbon materials, as well as comb...

AI Technical Summary

Problems solved by technology

However, the front face of the converter bears the double impact of molten iron and scrap; the rear face is subjected to the flow of molten steel during tapping; and the bottom of the furnace and the vicinity of the tap hole, etc., are easily damaged in advance due to harsh service conditions. For this reason, asphalt-bonded converter hot self-flowing repair materials are widely used. Most of them are made of various graded magnesia plus asphalt and other carbon materials, as well as combustion aids and sintering aids. According to the conditions of the use environment, the sintering time is basically about 45-60 minutes, and the service life of a repair is generally 10-30 heats