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Burden distribution method for using small coke nuts by blast furnace

A cloth and blast furnace technology, applied in blast furnaces, blast furnace details, furnaces, etc., to achieve the effects of improving overall utilization, relieving coking pressure, and reducing production costs

Inactive Publication Date: 2018-10-02
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method only utilizes coke with a particle size in the range of 8-20 mm, and coke with a particle size in the range of 5-8 mm, which produces a large proportion during the production and transportation of coke, is not utilized.

Method used

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  • Burden distribution method for using small coke nuts by blast furnace
  • Burden distribution method for using small coke nuts by blast furnace
  • Burden distribution method for using small coke nuts by blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The coke consumed by the blast furnace before the experiment was bulk coke with a particle size ≥ 25mm and diced coke with a particle size of 10-25mm, and coke with a particle size of 10-25mm was mixed with iron ore. During the experiment, 2 circles of 5-10 mm small cokes were placed on the edge of the furnace throat to replace large pieces of coke. At the beginning, 2 circles of cokes were placed on the edge of the blast furnace for every 5 batches of materials, and the proportion of small cokes was gradually increased. When the final furnace condition was stable At the same time, each batch of material is clothed with 2 circles of small Jiao Ding on the edge. The loading system consists of tweak to (Where K stands for ore, J d and J s Respectively represent large coke and small coke with a particle size of 5-10mm, and the numbers and subscripts represent the unit and the number of cloth circles respectively). The monthly economic and technical indicators befor...

Embodiment 2

[0031] The coke consumed by the blast furnace before the experiment was bulk coke with a particle size ≥ 25mm and diced coke with a particle size of 10-25mm, and coke with a particle size of 10-25mm was mixed with iron ore. During the experiment, 2 circles of 5-10 mm small cokes were placed on the edge of the furnace throat to replace large pieces of coke. At the beginning, 2 circles of cokes were placed on the edge of the blast furnace for every 5 batches of materials, and the proportion of small cokes was gradually increased. When the final furnace condition was stable At the same time, each batch of material is clothed with 2 circles of small Jiao Ding on the edge. The loading system consists of tweak to (Where K stands for ore J d and J s Respectively represent large pieces of coke and small coke with a particle size of 5-10mm, and the subscripts and subscripts of the numbers represent the ring position and the number of fabric circles respectively). The monthly ec...

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Abstract

The invention discloses a burden distribution method for using small coke nuts by a blast furnace. By adopting the method, the utilization ratio of small-size coke nuts is greatly increased, the coking pressure brought by increase of the productivity is relieved, and the production cost of pig iron is lowered at the same time; and the limitation that the size of cokes of the traditional large blast furnace 2,000m<3> or more grade needs to be larger than or equal to 25mm is broken through, and small coke nuts with the size being 5-10mm are applied to a blast furnace fuel, so that the utilization ratio of small-size coke nuts is increased.

Description

technical field [0001] The invention belongs to the technical field of blast furnace operation, and in particular relates to a bellless blast furnace material distribution method for improving the utilization rate of blast furnace coke. Background technique [0002] Blast furnace chargeless bell distribution refers to the charging method and sequence of the charge used in the process of loading the charge into the blast furnace, the selected rotary chute inclination, the batch weight of the charge, and the charge line controlled by the blast furnace operator. fabric. The principle of the blast furnace bellless material distribution method is to ensure the reasonable distribution of the gas flow in the blast furnace, make full use of the chemical energy and thermal energy of the gas, and ensure the stable operation of the blast furnace. important role. [0003] In order to ensure a certain degree of air permeability in the blast furnace, before the charge is distributed int...

Claims

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Application Information

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IPC IPC(8): C21B5/00
CPCC21B5/007C21B5/008
Inventor 姜喆车玉满郭天永孙鹏姚硕王传荣谢明辉胡攀王润博于文涛
Owner ANGANG STEEL CO LTD
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