A method for controlling the particle size of sintered fuel

Abstract

The invention discloses a control method for the particle size of sintering fuel and belongs to the technical field of sintering. The control method comprises the steps that the average particle size D of a sintering raw material is controlled to be 2.5-6.5 mm; and the average particle size of the sintering fuel is adjusted according to the average particle size of the sintering raw material, the average particle size d of the sintering fuel is controlled to be 1.5-3 mm, and meanwhile, the ratio of the average particle size d of the sintering fuel to the average particle size D of the sintering raw material is larger than or equal to 0.3 and smaller than or equal to 0.6. According to the control method for the particle size of the sintering fuel, the particle size of the sintering fuel is adjusted according to the particle size of the sintering raw material, so that the particle size of the sintering fuel is reasonably matched with the particle size of the sintering raw material, the fuel combustion speed is moderate, the sintering bed air permeability is good, liquid phase reaction is complete, and the technical effects of improving the sintered ore quality and reducing fuel consumption are achieved.

Description

technical field [0001] The invention relates to the technical field of sintering, in particular to a method for controlling the granularity of sintered fuel. Background technique [0002] Sintered ore is the main iron-containing raw material in blast furnace production. It is returned to the blast furnace, sintered ore, mixed ore, fuel and flux to form a mixture according to a certain proportion, with an appropriate amount of water, mixed and granulated before sintering The process of sintering on the machine to form lumps. There are many factors affecting the quality of sinter. It is necessary to determine the appropriate ratio of different iron ore powders, the amount of fuel and flux added before sintering to meet the requirements of the blast furnace charge structure. [0003] The particle size of the fuel has a great influence on the sintering process. From the kinetic and thermodynamic analysis of carbon combustion in the sintering process, it can be known that: 1) Wh...

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Problems solved by technology

[0005] The present invention solves the technical problem in the prior art that the particle size of the sintered fuel does not match with that of the sintered raw material by providing a method for controlling the particle size of the sintered fuel

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