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Process method for cancelling central coke charging

A process method, coke technology, applied in the direction of bell and funnel arrangement, furnace, blast furnace details, etc., can solve the problems of poor gas utilization rate and high fuel ratio, and achieve the improvement of gas utilization rate, uniform feeding, and prolongation of the forward cycle Effect

Inactive Publication Date: 2019-09-20
BAOTOU IRON & STEEL GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: poor gas utilization rate, high fuel ratio, etc., these are the biggest constraints to reduce the cost of blast furnace smelting

Method used

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  • Process method for cancelling central coke charging
  • Process method for cancelling central coke charging

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Embodiment Construction

[0017] Below in conjunction with example, the present invention will be further described.

[0018] Since a blast furnace in Baotou Steel was put into production, it has long used the central coke distribution mode. Although the stability is good, the gas utilization is poor and the fuel consumption is high. A reasonable operation policy and adjustment plan have been established, especially the in-depth research on the fabric pattern, and the fabric pattern has successfully transitioned from the center-focused type to the "platform + funnel" type.

[0019] The first stage: On the premise of stabilizing the central airflow, reduce the ore platform and loosen the edge airflow. Starting from June 7, 2017, the end angle of coke distribution changed from 23° to 33°, the batch weight of ore increased from 59.8t to 60.6t, and the batch weight of ore gradually increased to 62.6t in the next two days, and the distribution matrix changed from tweak to Reduce 1 level of ore, and fi...

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Abstract

The invention discloses a process method for cancelling central coke charging. The process method for cancelling central coke charging comprises the steps of S1, reducing an ore platform, loosening an edge airflow, and enlarging a central zone after a heat load is stabilized and the edge airflow is homogenized; S2, after the cross beam temperature measuring of a center tends to be stable, reducing the central coke amount, setting a coke matrix transition grade, adjusting the center and edge ore circle number, and reducing the impact of a distribution platform change on two airflows; and S3, stabilizing the distribution platform, and increasing a coke load; and after cancelling central coke charging step by step, increasing the ore batch weight according to the coke batch thickness suitable for a blast furnace.

Description

technical field [0001] The invention relates to a process method for canceling center coking. Background technique [0002] The center coking technology was first developed by Kobe Steel Corporation of Japan in the 1980s as a method of blast furnace material distribution. Because it can improve the air permeability of the upper part, reduce the melting loss reaction of the central coke column, and improve the ventilation and permeability of the dead material column in the center of the hearth. Liquidity, quickening the replacement time of the dead material column and other advantages, once it appeared, it has been highly concerned by the ironmaking industry. However, with the continuous improvement of blast furnace smelting technology and the continuous improvement of the quality of raw materials and fuels, under the current economic operation mode, some problems of central coking technology have become increasingly prominent. For example: poor gas utilization rate, high fu...

Claims

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Application Information

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IPC IPC(8): C21B5/00C21B7/20
CPCC21B5/001C21B5/007C21B7/20
Inventor 杨帆白晓光田凯张国成丁坤刘周利李玉柱
Owner BAOTOU IRON & STEEL GRP
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