High-temperature molten slag pelletizing device
A slag granulation, high temperature technology, applied in cement production and other directions, can solve the problems of difficult waste heat recovery, low thermal conductivity of blast furnace slag, etc., to achieve the effect of easy maintenance, easy industrial production, and avoidance of connection
Pending Publication Date: 2020-05-29
西安联创分布式可再生能源研究院有限公司
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Problems solved by technology
[0006] The thermal conductivity of blast furnace slag is generally low, which brings difficulties to waste heat recovery
Method used
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Embodiment 1
[0029] This embodiment provides a high temperature slag granulation device, such as figure 1 , including a pair of drums 16, a housing 1, a slag removal roller 5, and a driving device, which includes a motor 23, a reducer 22, and transmission gears (a large gear 20 and a pinion 21). The two rollers 4 are driven by the driving device to rotate in opposite directions respectively.
[0030] The drum 16 consists of two identical drums arranged in parallel, tangentially and counter-rotating.
[0031] The drum 16 is composed of an outer roller 18 and an inner roller 17, the upper half of the annular cavity between the outer roller 18 and the inner roller 17 is provided with a cooling water pipe 8, and a plurality of nozzles 9 are arranged on the cooling water pipe 8, and the water in the cooling water pipe 8 Spray to the drum 16 through the nozzle 9, so that the temperature of the outer surface of the outer drum 18 does not exceed 100°C, which can meet the quenching requirements of...
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The invention provides a high-temperature molten slag pelletizing device. The high-temperature molten slag pelletizing device comprises a pair of rollers, a shell, a supporting device, a deslagging roll and the like. The roller pair is composed of two exactly identical rollers which are parallelly arranged, are tangent and rotate reversely. Each roller is composed of an outer barrel and an inner barrel, wherein a cooling water pipe is arranged in an upper half part of an annular cavity between the outer barrel and the inner barrel, a plurality of nozzles are arranged on the cooling water pipe,water in the cooling water pipe is sprayed to the roller through the nozzles, and the temperature of the outer surface of the outer barrel does not exceed 100 DEG C, so that it is ensured that high-temperature creep does not occur on a roller material; and a lower half part of the annular cavity between the outer barrel and the inner barrel forms a water cavity with a certain height water level.On the one hand, the device pelletizes high-temperature molten slag to recover part of heat. On the other hand, the temperature of a slag layer on the surface of each roller before the slag layer reaches the deslagging roll and is extruded, peeled and crushed does not exceed 850 DEG C, the slag has been fully cooled to a curing temperature, and the lowest cooling rate of the slag is greater than 60 DEG C / s, so that the demand on rapid quenching is met.
Description
technical field [0001] The invention relates to comprehensive utilization of slag, in particular to a high-temperature slag granulation and waste heat recovery device. Background technique [0002] Blast furnace slag is the waste discharged from the blast furnace when the pig iron is smelted. When the furnace temperature reaches 1450-1650°C, the furnace charge is melted, and the gangue in the ore, the ash in the coke, the co-solvent and other impurities that cannot enter the pig iron are formed. Salt and aluminate are mainly slag floating on the molten iron, the main components are CaO, SiO2, Al2O3, and a small amount of MgO, MnO, FeO and S. Blast furnace slag is a waste of ironmaking. About 0.29 tons of blast furnace slag is produced per ton of pig iron. The furnace temperature is 1450-1650 ° C. The sensible heat and heat of solution of molten blast furnace slag reach 1883.6MJ / t. According to the calculation of my country's annual pig iron production of 600 million tons, 1...
Claims
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IPC IPC(8): C21B3/08C04B7/147
CPCC21B3/08C04B7/147C21B2400/056C21B2400/024Y02P40/10
Inventor 蒋荣辉张立臣吴飞周向民田玉宝杨博王派风段纪成吕连周马小勇胡娟
Owner 西安联创分布式可再生能源研究院有限公司