Electric furnace steelmaking method and system

An electric furnace steelmaking and electric furnace technology, which is applied to electric furnaces, furnaces, furnace types, etc., can solve the problems of increased steelmaking costs, difficulty in penetrating the slag layer into molten steel, and a large amount of injection.

Active Publication Date: 2020-01-17
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides an electric furnace steelmaking method, which is used to solve the problem that in the prior art, when the electric furnace fuel

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  • Electric furnace steelmaking method and system
  • Electric furnace steelmaking method and system
  • Electric furnace steelmaking method and system

Examples

Experimental program
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Embodiment 1

[0040] This embodiment provides a method for electric furnace steelmaking, such as figure 1 As shown, the method includes:

[0041] S110, using scrap steel and coal particles to make carbon briquettes;

[0042] In this embodiment, in order to increase the feeding speed of the electric furnace, the carbon briquettes are first made of scrap steel and coal particles, which specifically include:

[0043] placing the coal lump particles inside the steel scrap, so that the scrap steel wraps the coal lump particles;

[0044] Using a briquetting machine to press the steel scrap wrapped with the coal particles into the carbon-combined briquette.

[0045] Among them, the carbon content of the coal block formed by the coal particles in the carbon briquette is ≥75%, and the weight of each carbon briquette is 70-100kg; the coal content in each carbon briquette is 10-20kg , the length, width and height of each carbon briquetting block are 200mm×300mm×300mm.

[0046] Here, the coal block...

Embodiment 2

[0059] This embodiment provides an electric furnace steelmaking system, such as figure 2 As shown, the system includes: a briquetting machine 21, a horizontal feeding device 22, a carbon powder injection device 23 and an oxygen supply part 24; wherein,

[0060] In order to increase the feeding speed of the electric furnace, the briquetting machine 21 is used to make carbon briquettes by using scrap steel and coal particles; specifically includes:

[0061] placing the coal lump particles inside the steel scrap, so that the scrap steel wraps the coal lump particles;

[0062] Using a briquetting machine to press the steel scrap wrapped with the coal particles into the carbon-combined briquette.

[0063] Among them, the carbon content of the coal block formed by the coal particles in the carbon briquette is ≥75%, and the weight of each carbon briquette is 70-100kg; the coal content in each carbon briquette is 10-20kg , the length, width and height of each carbon briquetting blo...

Embodiment 3

[0074] In actual application, when using the method provided in Embodiment 1 and the system provided in Embodiment 2 to carry out steelmaking in a 60-ton Consid electric furnace, the details are as follows:

[0075] First make carbon briquettes according to the method provided in Embodiment 1, the carbon content of the coal briquettes formed by the coal particles in the carbon briquettes is ≥75%, and the weight of each carbon briquette is 80kg; each carbon briquette The coal content in the block is 6kg (7.5% by weight), and the length, width and height of each carbon briquette are 200mm×300mm×300mm.

[0076] Scrap steel is a light and thin material, and the weight percentage of each component in the scrap steel includes: carbon C is 0.03%, copper Cu is 0.005%, nickel Ni is 0.05%, selenium As is 0.01%, and the rest is Fe and impurities.

[0077] After the carbon briquettes are made, during the four steelmaking processes, when the electric furnace is energized, use the horizonta...

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Abstract

The embodiment of the invention provides an electric furnace steelmaking method and system. The method comprises the steps that carbon-matching pressing blocks are prepared by using scrap steel and coal block particles; when an electric furnace is powered on, 70-75 t scrap steel and carbon distribution pressing blocks are added by using a horizontal feeding device, the weight of the carbon-matching pressing blocks is 15-50 t, and 340-750 kg of carbon powder is blown into the electric furnace by using a carbon powder blowing device; oxygen is supplied into the electric furnace, and the oxygen supply amount per ton of steel is 28-30 Nm<3>; the carbon content of the coal block formed by coal block particles in the carbon-matching pressing blocks is larger than or equal to 75%; the weight of each carbon-matching pressing block is 70-100 kg; when the electric furnace capacity is smaller than 80 t, the weight of the coal block in each carbon-matching pressing block is 5-10 kg.

Description

technical field [0001] The invention belongs to the technical field of electric furnace steelmaking, and in particular relates to an electric furnace steelmaking method and system. Background technique [0002] With the improvement of the steelmaking efficiency of the electric furnace, the oxygen intensity of the electric furnace increases, and while the production efficiency increases, the content of iron oxide FeO in the electric furnace slag also increases, which not only leads to an increase in iron loss and a decrease in the metal recovery rate, but also directly affects The composition of foam slag and submerged arc effect will increase the cost of electricity consumption, so it is particularly important to increase the carbon content of electric furnace fuel. [0003] In the prior art, the carbon materials of many electric furnace steelmaking enterprises are mainly light and small materials, which leads to slow feeding speed and prolongs the electric furnace smelting ...

Claims

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Application Information

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IPC IPC(8): C21C5/54
CPCC21C5/527C21C5/54Y02P10/20
Inventor 丁宁王勇孙齐松王翔李玉全潘江金俊鑫吕迺冰刘勇刘珂郑玉龙王伟刘银波邱智捷孔祥涛彭世江
Owner SHOUGANG CORPORATION
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