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Blast furnace sinter graded feeding technology

A sinter and process technology, which is applied in the field of blast furnace sinter grading charging technology to achieve the effects of improving utilization rate, optimizing raw material structure, and enhancing adaptability

Inactive Publication Date: 2015-01-28
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when recovering sintered ore with a small particle size of 3-5mm, it is not possible to simply set 5mm as the particle size classification point.

Method used

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  • Blast furnace sinter graded feeding technology
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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings. Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the technical solution of the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom" and "front", "rear", "left" ", "right" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and do not require t...

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Abstract

The invention provides a blast furnace sinter graded feeding technology. The blast furnace sinter graded feeding technology comprises the steps that sinter is divided into first-grade sinter and second-grade sinter according to the particle size of the sinter, the first-grade sinter and second-grade sinter are divided according to a grading point, the particle size of the first-grade sinter is larger than that of the grading point, the particle size of the second-grade sinter ranges from 3mm to the grading point, the first-grade sinter and the second-grade sinter are distributed in a blast furnace through rotating chutes, the first-grade sinter is distributed in a layered mode and can be fed into the blast furnace together with nut coke, and the second-grade sinter is mainly distributed on the first-grade sinter and is closed to a furnace wall. Due to the technological steps, the consumption of small-particle-size sinter is increased, the utilization rate of the sinter is increased, the breathability of furnace burden is improved, and stable and smooth operation of the blast furnace is promoted.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a blast furnace sintered ore graded charging process. Background technique [0002] In the blast furnace smelting process, in order to keep the blast furnace production stable and smooth, it is necessary to control the charge to have a reasonable air permeability. Because the ore with a particle size of less than 5mm is inside the blast furnace, it will affect the gas permeability of the charge, resulting in an increase in the pressure drop of the material layer, which is not conducive to the smooth flow of smelting. Blast furnaces at home and abroad usually put ore with a particle size greater than 5mm into the blast furnace for smelting. In order to promote the smooth running of the blast furnace and improve the gas permeability of the charge, some blast furnace smelting adopts the sinter classification into the furnace process, and the sinter above 5mm is divided into two par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 王小伟范小刚
Owner WISDRI ENG & RES INC LTD
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