Tap hole medium-temperature-sintering environment-friendly stemming for large- and medium-sized blast furnaces and preparation method of tap hole medium-temperature-sintering environment-friendly stemming

Abstract

The invention relates to tap hole medium-temperature-sintering environment-friendly stemming for large- and medium-sized blast furnaces and a preparation method of the tap hole medium-temperature-sintering environment-friendly stemming.The spreading drying material of the stemming is reasonable in composition and combination and is characterized in that the spreading drying material uses high-aluminum clinker and coke powder as aggregate and brown aluminum oxide, clay and silicon carbide as powder, ferro-silicon nitride content is adjusted, micro-powder such as silicon powder and alpha-aluminum oxide and anti-burst fibers are added, and the binder is the mixture of 9-11 parts of tar, 2-5 parts of resin and 1-3 parts of anthracene oil.The tap hole medium-temperature-sintering environment-friendly stemming has the advantages that the anti-burst fibers are added, so that the heat conduction ability of the stemming is increased, combustion carbonization of the tap hole stemming can be achieved during high-temperature exhausting, and the opening performance of the stemming is improved; the small amount of fire-resistant materials such as the brown aluminum oxide, the silicon carbide and the ferro-silicon nitride with excellent slag iron corrosion resistance are combined with the anti-burst fibers which can exhaust and combust fast and the high-aluminum clinker which is low in cost, the molten iron and slag corrosion resistance of the stemming is increased greatly, and the tapping time of the stemming is guaranteed, and environment pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of refractory materials for iron and steel metallurgy, in particular to a medium-temperature sintering environment-friendly taphole mud for large and medium-sized blast furnaces and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the iron and steel industry, the development process of large-scale blast furnaces has also been accelerated. The technical advantages of large-scale blast furnaces are mainly reflected in high efficiency and intensive, energy saving and emission reduction, low consumption and environmental protection, and information control. At the same time, the large-scale blast furnace also strongly promotes the development of refractory technology. Due to its high output and large amount of iron in a single pass, large-scale blast furnaces have high requirements on the quality of the blast furnace clay. It requires that the blast furna...

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Problems solved by technology

[0007] The invention provides a medium-temperature sintering environment-friendly taphole clay for large and medium-sized blast furnaces and a preparation method thereof, which solves the problems of poor rapid sintering performance, low strength and thermal conductivity, and poor slag iron erosion and erosion resistance of the taphole

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