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All-scrap continuous steelmaking system and smelting process

An all-scrap steel and process technology, applied in the field of steelmaking, can solve problems such as increasing the utilization efficiency of transformers

Active Publication Date: 2020-05-05
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the existing electric arc furnace steelmaking system equipment and technology, to provide a stable, high-efficiency, low-cost, high-quality, long-life all-scrap continuous steelmaking system and technology, to achieve stable production, shorten the product smelting cycle, reduce Smelting energy consumption and material consumption, increasing the utilization efficiency of transformers, alleviating power quality problems caused by smelting, improving product quality, and extending equipment life

Method used

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  • All-scrap continuous steelmaking system and smelting process
  • All-scrap continuous steelmaking system and smelting process
  • All-scrap continuous steelmaking system and smelting process

Examples

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Embodiment 1

[0048] In this embodiment, the process of the present invention is applied to the implementation of the present invention when the first furnace of an all-scrap continuous steelmaking system starts smelting, and the specific process is as follows:

[0049] (1) 0 to 10 minutes: this stage is the stage of distributing materials in the melting section;

[0050] Specific process: open the hearth cover to distribute material evenly at the bottom of the melting section, and close the retaining wall channel;

[0051] (2) 10 to 30 minutes: this stage is the stage where scrap steel is melted into molten steel in the melting section and flows to the oxidation section;

[0052] Specific process: the electrodes are dropped, the furnace wall cluster oxygen lance is used to assist melting, lime, carbon powder and other auxiliary materials are added through the feeding port, and the automatic slag flow is controlled at the slag outlet; after the scrap steel in the melting section is complete...

Embodiment 2

[0062] In this embodiment, the process of the present invention is applied to smelting Q235A in an all-scrap continuous steelmaking system in the present invention, and the specific process is:

[0063] (1) 0~5min: This stage is the stage where scrap steel is preheated in the continuous feeding shaft until it enters the smelting bed:

[0064] Specific process: steel scrap is added into the shaft, and the flue gas of the smelting bed is combusted by oxygen burners, and the high-temperature flue gas enters the shaft to heat the scrap steel;

[0065] (2) 5 to 20 minutes: This stage is the melting and heating stage of scrap steel in the melting section:

[0066] Specific process: energize to melt scrap steel, use the furnace wall cluster oxygen lance 203 to assist melting or slagging, further, add lime, carbon powder and other auxiliary materials through the feeding port, and control the automatic slag flow at the slag outlet;

[0067](3) 20 to 35 minutes: This stage is the stage...

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Abstract

The invention relates to the technical field of steelmaking, and provides an all-scrap continuous steelmaking system and a smelting process. Through the division of the scrap steel smelting process into six procedures of preheating, fusion, preliminary smelting, refining, finishing and casting, the different smelting procedures can be performed in different devices; through the cooperation betweencontinuous feeding and continuous casting, the dynamic balancing of material and energy flow among a smelting bed, a refining bed and a tundish can be kept, thereby achieving stable, efficient, low-cost, high-quality and long-life all-scrap continuous steelmaking production; and by the use of the all-scrap continuous steelmaking system and the smelting process, the electricity consumption per tonof steel can be reduced by 50 kWh or above, the energy consumption can be reduced by 10 kgce or above, the product quality can be improved, the smelting rhythm can be accelerated, and the productioncost can be reduced.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to an all-scrap continuous steelmaking system and process. Background technique [0002] At present, the production from steel scrap to finished billets mainly depends on the electric arc furnace steelmaking system, which is divided into three processes: electric arc furnace steelmaking-refining-continuous casting. The modern electric arc furnace steelmaking system realizes the preheating of scrap steel through continuous feeding equipment, and realizes the continuous feeding production of electric arc furnace to a certain extent, and realizes the continuous production of billets through continuous casting equipment, but its smelting and transportation are still It is an open intermittent production process. [0003] At present, the electric arc furnace has realized quasi-continuous feeding, which is represented by the Considy electric arc furnace and the vertical electric arc ...

Claims

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Application Information

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IPC IPC(8): C21C5/56C21C7/06
CPCC21C5/562C21C7/06Y02P10/20
Inventor 朱荣田博涵董凯魏光升吴学涛张洪金
Owner UNIV OF SCI & TECH BEIJING
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