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Blast furnace loading material sequence control method and system

A control method and blast furnace technology, applied in the field of blast furnace smelting, can solve problems such as unstable gas distribution in the furnace

Active Publication Date: 2018-01-30
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention solves the technical problem that the existing charging system will cause unstable gas distribution in the furnace by providing a blast furnace charging sequence control method and system

Method used

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  • Blast furnace loading material sequence control method and system
  • Blast furnace loading material sequence control method and system
  • Blast furnace loading material sequence control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] If the N kinds of materials needed for the current smelting include ground coke, small dry coke and large dry coke that are classified and placed in different silos, then in the process of the current smelting, start from the moment when the current smelting starts Delay timing, the feeding sequence of ground coke, small dry coke and large dry coke is as follows: when the delay timing reaches 10s and 80s, respectively open a gate for placing large dry coke until it is put into the blast furnace When the total discharge time of the large dry coke is 131s, close the gates of the two bins for the large dry coke that have been opened at the same time; Gate, until the total time of discharging small dry coke into the blast furnace is 84s, close the gates of the two bunkers for placing small dry coke that have been opened at the same time; The gate of the coke silo is closed until the total discharge time of ground coke is 18s.

[0109] In this embodiment, the opening of the...

Embodiment 2

[0117] If the N kinds of materials required for the current smelting include ground coke and mixed dry coke that are classified and placed in different silos, the time delay is performed starting from the moment when the current secondary blast furnace smelting starts. During the current smelting process, The feeding sequence of ground coke and mixed dry coke is as follows:

[0118] When the delay timing reaches 10s, 28s, 52s, and 80s, respectively open the gates of a bunker for placing mixed dry coke until the total time for putting mixed dry coke into the blast furnace is 124s, then close the already opened storage bin for placing mixed dry coke. The gates of the four hoppers for dry coke; when the delay time reaches 28s, open the gate of a silo where the ground coke is placed, and close it when the total discharge time of the ground coke is 18s.

[0119] In the second embodiment, the opening of the gate for storing mixed dry coke is 25 cm; the gate opening for storing small...

Embodiment 3

[0126] If the N kinds of materials required for the current smelting include sintered ore, pellet ore, coke, Australian ore and limestone classified in different silos, start the time delay from the start time of the current secondary blast furnace smelting. During the current smelting process, the feeding sequence of sinter, pellets, coke, Australian ore and limestone is as follows:

[0127] When the delay timing reaches 1s and 45s, respectively open the gate of a bunker for placing pellets until the total time of discharging pellets into the blast furnace is 135s, close the two gates for placing pellets that have been opened. The gate of each silo; when the delay timer reaches 10s, 50s, and 90s, open a sintered ore storage bin respectively, and close the opened sintered ore storage bin until the total discharge time of sintered ore into the blast furnace reaches 165s. The gates of the three bunkers; when the delay timer reaches 35s, open the gate of a bunker for placing coke...

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Abstract

The invention discloses a blast furnace loading material sequence control method and system. The method comprises the following steps: before a blast furnace begins the current smelting, determining Pcabins in which N materials are disposed from M cabins according to the N materials required at the current smelting; separately setting a gate opening delay, discharging duration and gate openness of the P cabins according to addition amounts of the N materials required at the current smelting; controlling a loading sequence of the N materials in the current smelting process as follows: performing delay timing by adopting a start moment of the current smelting as start, at the moment when the delay timing reaches the gate opening delay timing of the i cabin of the P cabins, opening a gate of the i cabin to the gate openness set for the i cabin so as to dispense a material in the i cabin to a transport belt; when the actual discharging duration of the i cabin is equalto the discharging duration set for the i cabin, closing the gate of the i cabin. By adopting the blast furnace loading material sequence control method and system, the problem that the distribution of coal gas in the furnace is unstable due to the existing loading system can be solved.

Description

technical field [0001] The invention relates to the field of blast furnace smelting, in particular to a method and system for controlling the charging sequence of a blast furnace. Background technique [0002] In the blast furnace smelting process, various processes are carried out under the condition of continuous reverse movement of the charge and gas. Therefore, the smooth decline of the charge and the reasonable distribution of the gas flow are the signs of the forward movement of the blast furnace. We often pass the upper charging system. To achieve a reasonable distribution of blast furnace gas, keep the blast furnace running smoothly, improve gas utilization, increase production, and reduce consumption. The charging system includes the charging method, the weight of the material batch, the material distribution method, and the height of the material line. [0003] However, there are many types of raw materials for blast furnaces, and they change frequently during dai...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 李宏伟鲁俭王正新滕召杰陈川王牧麒
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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