Fuel gradation homoenergetic sintering method

Abstract

The invention discloses a fuel gradation homoenergetic sintering method and relates to the field of strand sintering of iron ore powder in the metallurgical production system and chemical reaction kinetics. According to the method, the automatic heat accumulation function in the sintering process of a material bed is considered, the fuel usage amount is gradually reduced in the height direction of the material bed, so that the sintering material bed can keep stable production performance of high temperature and uniformity from top to bottom, and the effects of high quality, high yield and low energy consumption are achieved; the method aims for energy consumption reduction and waste heat recovery in the steel production, has the eyes on the characteristic that automatic heat accumulation can be conducted on a thick material bed in the sintering technique with higher energy consumption and solves the problem that the quality of sintered ores in the height direction of the material bed is uneven, so that the yield of the sintered ores is reduced, and sintering energy consumption is increased, so that the utilization efficiencyof waste heat and the utilization factor, the tumbler strength and the yield of the sintered ores are improved, and the average grain diameters of finished ores are increased.

Description

technical field [0001] The invention relates to the field of belt-type sintering of iron ore powder in a metallurgical production system, relates to chemical reaction kinetics, and in particular relates to a sintering energy-saving waste heat recovery technology, in particular to a method for sintering fuel graded uniform energy. Background technique [0002] The energy consumption of the sintering process accounts for about 10% of the comprehensive energy consumption per ton of steel, which is the second energy-consuming process after ironmaking and steel production. Sintering process energy consumption includes solid fuel consumption, electricity consumption, ignition gas consumption, power (compressed air, steam, water, etc.) consumption, of which solid fuel consumption accounts for 75%-80%, electricity consumption accounts for 13%-20%, ignition gas consumption Consumption accounts for 5%-10%. Therefore, the focus of energy saving in the sintering process is to reduce so...

AI Technical Summary

Problems solved by technology

This method considers the automatic heat storage effect of the material layer during the sintering process, and gradually reduces the fuel consumption along the height direction of the material layer, so that the sintered material layer maintains a stable high temperature and uniform production performance from top to bottom, thereby achieving high quality and high output. and reduce energy consumption; aiming at reducing energy consumption and waste heat recovery in iron and steel production, focusing on the characteristics of "automatic heat storage" of thick material layers in the sintering process with high energy consumption, it solves the uneven quality of sinter in the direction of material layer height, so that sintering The problem of the decline of ore yield and the increase of sintering energy consumption, and then improve the efficiency of waste heat utilization, the utilization coefficient of sinter, drum strength, yield and increase the average particle size of finished ore

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