Blast-furnace anhydrous stemming and production device thereof

Abstract

The invention discloses a blast-furnace anhydrous stemming and a production device thereof. The blast-furnace anhydrous stemming is prepared from the following raw materials by weight: 4 to 8% of superfine homogenized bauxite particles, 17 to 20% of brown fused alumina particles, 3 to 7% of white fused alumina powder, 4 to 8% of tabular corundum powder, 2 to 6% of chromite sand powder, 9 to 18% of a carbon material, 4 to 10% of high-purity silicon carbide, 5 to 7% of silicon carbide particles, 10 to 13% of submicron powder, 8 to 12% of soft clay, 2 to 5% of sericite, 2 to 4% of metal silicon powder and 10 to 12% of composite oil. The invention has the following advantages: slag erosion resistance of the anhydrous stemming is increased; resistance of the anhydrous stemming to high-temperature molten iron erosion and wear is strengthened; opening performance and iron slag erosion resistance of the traditionally-used anhydrous stemming are improved; the quality stability of the anhydrous stemming is enhanced; meanwhile, a by-product electrical resistance material of carbon electrode smelting is utilized, so the anhydrous stemming is more beneficial for protection of resources and the environment.

Description

technical field [0001] The patent of the present invention relates to the field of refractory materials, in particular to an anhydrous blast furnace mortar. Background technique [0002] Blast furnace ironmaking is currently the most important ironmaking method in the world. As of 2013, my country's molten iron production reached nearly 800 million tons. Small blast furnaces have been gradually phased out due to their low output, heavy energy consumption and serious pollution. At present, the production of large and medium blast furnaces in the field of ironmaking accounts for more than 65% of domestic molten iron production. Large and medium-sized blast furnaces have high smelting intensity, large output, and long tapping time; when tapping, a large amount of slag will flow out with the molten iron from the anhydrous taphole hole of the taphole. The damage to the durability of anhydrous taphole mud is higher than that of molten iron for its high-temperature erosion, so it ...

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Problems solved by technology

Large and medium-sized blast furnaces have high smelting intensity, large output, and long tapping time; when tapping, a large amount of slag will flow out with the molten iron from the anhydrous taphole hole of the taphole. The damage to the durability of anhydrous taphole clay is higher than the high temperature erosion of molten iron, so it often occurs that the tapping time and the amount of iron tapping are not enough due to the poor resistance to slag erosion of anhydrous taphole clay

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