Siliceous stemming for filling blast furnace taphole and preparation method thereof

Abstract

The invention relates to siliceous stemming for filling a blast furnace taphole and a preparation method thereof, and belongs to the field of high-temperature metallurgical fireproof materials. The method comprises the following steps of: pre-mixing 35 to 45 mass percent of diaspore silicate, 16 to 27 mass percent of silicon carbide, 3 to 5 mass percent of micro powder, 10 to 18 mass percent of ball clay, 2 to 4 mass percent of graphite, 1 to 3 mass percent of plasticizer, 6 to 10 mass percent of ferrosilicon nitride, 2 to 4 mass percent of metal powder, 3 to 5 mass percent of modified asphalt powder and 3 to 5 mass percent of expanding agent aluminum silicate fine powder for later use, putting into a wheel roller and pre-rolling for 5 minutes; adding 15 to 20 mass percent of modified liquid tar, performing wheel rolling at a high speed for 30 to 35 minutes to ensure that a Marshall value is between 4 and 16MPa; and packaging, and measuring the Marshall value 3 days later, wherein the product is qualified when the Marshall value is between 8 and 24MPa. The problems of low high-temperature strength and high-temperature toughness of the stemming are solved, and the problems of a shallow iron notch, a broken iron notch and splashing are solved simultaneously.

Description

technical field [0001] The invention relates to a blast furnace tap hole filling siliceous gun mud and a preparation method thereof, belonging to the field of high-temperature metallurgical refractory materials. Background technique [0002] At present, most of the anhydrous taphole mud used in China use coal tar and asphalt as binders. The residual carbon content of tar is 20-30, which belongs to homogeneous brittle combination, low bonding strength, and easy to break due to sudden changes in high temperature; and the content of benzoic acid As high as 10,000-13,000ppm (carcinogens), the thick black smoke in the tapping process diffuses throughout the casting plant, causing great harm to the human body, which is not in line with environmental protection and emission reduction; broken iron holes, splashes, and difficult iron holes often occur Opening and other phenomena seriously affect the life of the blast furnace, which restricts the high efficiency, stability and smooth ...

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Problems solved by technology

[0003] Aiming at the production status of many blasting clay manufacturers in my country and the problems existing in the use of blasting clay, the present invention introduces high-carbon binder T60 and CP asphalt resin powder, which solves the problems of poor high-temperature strength, poor high-temperature toughness and environmental pollution of Chinese gun clay and durability, economical issues

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