CN102041349A - Method for smelting steel by adopting induction furnace - Google Patents
Method for smelting steel by adopting induction furnace Download PDFInfo
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- CN102041349A CN102041349A CN 201010599708 CN201010599708A CN102041349A CN 102041349 A CN102041349 A CN 102041349A CN 201010599708 CN201010599708 CN 201010599708 CN 201010599708 A CN201010599708 A CN 201010599708A CN 102041349 A CN102041349 A CN 102041349A
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Abstract
本发明涉及一种采用感应炉冶炼钢的方法，包括以下步骤：首先将预熔炼的废钢放入感应炉的缸锅内，然后通电加热，当缸锅内的废钢温度达到800-900℃时，停止电加热，改用向该缸锅内吹入氧气加热，而当废钢开始熔化或部分熔化后，停止吹氧，再通电加热，直至废钢完全熔化后，即为熔融态钢。采用本发明所提出的方法可以提高钢材的质量和降低冶炼成本，以及缩短炼钢时间。The invention relates to a method for smelting steel in an induction furnace, which comprises the following steps: firstly put the pre-smelted steel scrap into the crock pot of the induction furnace, and then heat it with electricity, when the temperature of the scrap steel in the crock pot reaches 800-900°C, Stop electric heating, and use blowing oxygen into the pot for heating instead, and when the scrap steel starts to melt or partially melt, stop blowing oxygen, and then turn on the electric heating until the scrap steel is completely melted, that is, molten steel. The method proposed by the invention can improve the quality of the steel, reduce the smelting cost, and shorten the steelmaking time.
Description
Technical field
The present invention relates to a kind of method that adopts induction furnace to smelt steel.
Background technology
Existing induction furnace comprises normal pressure medium-frequency induction furnace and line frequency induction furnace.Though induction furnace is a kind of equipment of metal smelting, adopt the steel-making of this kind equipment, according to the difference of smelting process, can obtain the steel of different mass and different power consumptions.Because induction furnace relies on inductor block that metal in the stove is heated, promptly be to rely on electric energy to smelt the equipment of steel or other metal, so, in the prior art, a kind of mistaken ideas think and utilize induction furnace steel-smelting can only adopt electric energy, in steelmaking process, from metal such as steel scrap in the input cylinder pot, until smelting scrap steel is arrived molten state, all adopt the electric energy heating.
With regard to adopting induction furnace steel-smelting, no matter adopt any method, the final index of examination has only these two of the quality of steel and steel-making cost.In above-mentioned method for making steel,, make lack of air in the cylinder pot owing to adopt the electric energy heating, promptly be in anoxic condition, and the elements such as hydrogen nitrogen that contained in the steel scrap can not be got rid of, thus contain more hydrogen nitrogen element in the steel that adopts this kind smelting process to smelt, and then influence the quality of steel; On steel-making cost, only calculate to adopt induction furnace to smelt one ton of steel, accurate black furnace was smelted one ton of used time of steel about 150 minutes, and one ton of used time of steel of heat furnace smelting, existing commercial power expense was 0.8 yuan of every degree about about 130 minutes, the rated output that induction furnace is general is 400Kw, black furnace current consumption is 1000 degree, and expense is 800 yuan, and hot stove current consumption is 833 degree, expense is 666.4 yuan, so the cost of this kind smelting process is higher relatively.
Summary of the invention
Task of the present invention provides a kind of oxygen that utilizes and heats the method that employing induction furnace that the mode of dehydrogenation nitrogen element side by side solves steel-making cost and steel quality problem is smelted steel.
Employing induction furnace proposed by the invention is smelted the method for steel, may further comprise the steps: the cylinder pot of at first steel scrap of presmelting being put into induction furnace, energising heating then when the steel scrap temperature in the cylinder pot reaches 800-900 ℃, stops electrically heated, use instead and in this cylinder pot, be blown into the oxygen heating, and after steel scrap begins fusing or partial melting, stop oxygen blast, energising heating again, after steel scrap melts fully, be the molten state steel.
When utilizing induction furnace steel-smelting, adopt method proposed by the invention can improve the quality and the reduction smelting cost of steel, and shorten the steel-making time.Table 1 provides the content of concrete scrap melting time, current consumption and oxygen, nitrogen, hydrogen.
Table one:
Annotate: the 1-3 heat adopts the conventional steel of directly smelting with electric energy, and wherein No. 3 induction furnaces are hot charging stoves, and No. 1 and No. 2 is induction furnace cold charge stove; The steel that the 4-6 heat adopts oxygen blast to smelt, wherein No. 6 induction furnaces are hot charging stoves, No. 4 and No. 5 stove induction furnaces are cold charge stoves.As can be seen from Table 1, the steel that the 4-6 heat adopts oxygen blast to smelt, the content of oxygen, nitrogen, hydrogen be far below the steel of smelting with traditional method, and melting waste steel time, current consumption also reduce greatly.
Embodiment:
Embodiment 1:
When utilizing line frequency induction furnace or medium-frequency induction furnace to smelt steel, at first the steel scrap of presmelting is put into the cylinder pot of induction furnace, then to the induction furnace heating of switching on, when the steel scrap temperature in the cylinder pot reaches 800-900 ℃, stop electrically heated, use instead and in this cylinder pot, be blown into the oxygen heating, and after steel scrap begins fusing or partial melting, stop oxygen blast, use the energising heating again instead, after steel scrap melts fully, be the molten state steel.
Embodiment 2:
When utilizing line frequency induction furnace or medium-frequency induction furnace to smelt steel, at first the steel scrap of presmelting is put into the cylinder pot of induction furnace, then to the induction furnace heating of switching on, when the steel scrap temperature in the cylinder pot reaches 800-900 ℃,, in this cylinder pot, be blown into the oxygen heating in the electrically heated while, and after steel scrap begins fusing or partial melting, stop oxygen blast, continue the energising heating, after steel scrap melts fully, be the molten state steel.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010599708 CN102041349A (en) | 2010-12-22 | 2010-12-22 | Method for smelting steel by adopting induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010599708 CN102041349A (en) | 2010-12-22 | 2010-12-22 | Method for smelting steel by adopting induction furnace |
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| Publication Number | Publication Date |
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| CN102041349A true CN102041349A (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010599708 Pending CN102041349A (en) | 2010-12-22 | 2010-12-22 | Method for smelting steel by adopting induction furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321783A (en) * | 2011-09-19 | 2012-01-18 | 武汉钢铁(集团)公司 | Steel-making method of experimental induction furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084571A (en) * | 1993-07-29 | 1994-03-30 | 扬合景 | Oxygen-blast smelting process for manufacture of steel in induction electric furnace |
| CN1775959A (en) * | 2005-11-24 | 2006-05-24 | 广东韶钢松山股份有限公司 | Electric furnace to converter steel making production process |
| CN101899548A (en) * | 2010-08-10 | 2010-12-01 | 无锡西城特种船用板有限公司 | Novel process for scrap steel preheating and premelting and high-efficiency electric furnace steel making |
-
2010
- 2010-12-22 CN CN 201010599708 patent/CN102041349A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084571A (en) * | 1993-07-29 | 1994-03-30 | 扬合景 | Oxygen-blast smelting process for manufacture of steel in induction electric furnace |
| CN1775959A (en) * | 2005-11-24 | 2006-05-24 | 广东韶钢松山股份有限公司 | Electric furnace to converter steel making production process |
| CN101899548A (en) * | 2010-08-10 | 2010-12-01 | 无锡西城特种船用板有限公司 | Novel process for scrap steel preheating and premelting and high-efficiency electric furnace steel making |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321783A (en) * | 2011-09-19 | 2012-01-18 | 武汉钢铁(集团)公司 | Steel-making method of experimental induction furnace |
| CN102321783B (en) * | 2011-09-19 | 2013-03-20 | 武汉钢铁(集团)公司 | Steel-making method of experimental induction furnace |
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Application publication date: 20110504 |