CN105018681A - Temperature adjusting method for smelting silicon steel with RH refining - Google Patents
Temperature adjusting method for smelting silicon steel with RH refining Download PDFInfo
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- CN105018681A CN105018681A CN201510518836.5A CN201510518836A CN105018681A CN 105018681 A CN105018681 A CN 105018681A CN 201510518836 A CN201510518836 A CN 201510518836A CN 105018681 A CN105018681 A CN 105018681A
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Abstract
The invention discloses a temperature adjusting method for smelting silicon steel with RH refining. According to the temperature adjusting method for smelting the silicon steel with RH refining, the production cost can be lowered, the purity degree and the castability of steel liquid can be improved, and multi-furnace continuous casting of the silicon steel can be guaranteed. When the temperature or the oxygen of RH steel liquid directly supplied by a converter is too high, low carbon ferrosilicon with the steel liquid weight ranging from 2.5% to 10% is firstly added in the early RH deoxidizing stage to remove the oxygen in the steel liquid, and therefore the purpose of small temperature rise is achieved.
Description
Technical field
The present invention relates to silicon steel metallurgical technology field, particularly relate to the method for a kind of smelting silicon steel RH refining adjustment temperature.
Background technology
Converter smelting silicon steel has gone out steel and has crossed RH liquid steel temperature >1620 DEG C and in molten steel during oxygen level >600ppm, if adopt aluminium deoxidation can make RH terminal temperature meeting >1600 DEG C, the situation for casting machine molten steel overheat is too high is caused to occur.
The weight ratio of constituents of RH refinement and deoxidation alloying low-carbon ferrosilicon is: [Si] >77%, [C] <0.042%, [Al] <0.08%, [P] <0.01%, [S] <0.01%, [N] <0.020%, all the other are iron and inevitable impurity;
The molten steel of current domestic steel mill converter direct-furnish RH not deoxidation, all adopt and in earlier stage add little steel scrap in RH process if cross steel temperature height and lower the temperature, its cooling-down effect is that little steel scrap per ton falls 7 DEG C (210t molten steel), and effect is undesirable and cost is higher.
Summary of the invention
The object of this invention is to provide the method for a kind of smelting silicon steel RH refining adjustment temperature, can production cost be reduced, improve Molten Steel Cleanliness and castability, guarantee silicon steel sequence casting.
For reaching above-mentioned purpose, the method for a kind of smelting silicon steel RH of the present invention refining adjustment temperature, converter direct-furnish RH liquid steel temperature or oxygen too high time, the low-carbon ferrosilicon that RH deoxidation first adds Metal Weight 2.5-10% early stage removes oxygen in molten steel to reach the object of few intensification.
The invention difference from existing technology is that the present invention achieves following technique effect:
The present invention's low-carbon ferrosilicon replacement fine aluminium carries out deoxidation to molten steel and can reach adjustment temperature and reduce costs double effects.
Embodiment
Below in conjunction with embodiment, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
For 210 tons of RH stoves:
Table 1
Note: the deoxidation low-carbon ferrosilicon in upper form and composition low-carbon ferrosilicon are all same low-carbon ferrosilicons, and the former adds to slough steel grade free oxygen, the latter adds to meet the requirement of steel grade chemical composition.
Table 1 embodiment illustrates: comparatively can lack intensification 6-13 DEG C with fine aluminium deoxidation with low-carbon ferrosilicon deoxidation, avoid the generation of converter high-temperature steel quality accident.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (1)
1. a method for smelting silicon steel RH refining adjustment temperature, is characterized in that: converter direct-furnish RH liquid steel temperature or oxygen too high time, the low-carbon ferrosilicon that RH deoxidation first adds Metal Weight 2.5-10% early stage removes oxygen in molten steel to reach the object of few intensification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510518836.5A CN105018681A (en) | 2015-08-21 | 2015-08-21 | Temperature adjusting method for smelting silicon steel with RH refining |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510518836.5A CN105018681A (en) | 2015-08-21 | 2015-08-21 | Temperature adjusting method for smelting silicon steel with RH refining |
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| CN105018681A true CN105018681A (en) | 2015-11-04 |
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| CN201510518836.5A Pending CN105018681A (en) | 2015-08-21 | 2015-08-21 | Temperature adjusting method for smelting silicon steel with RH refining |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349755A (en) * | 2020-03-17 | 2020-06-30 | 本钢板材股份有限公司 | Direct supply silicon control process for SAE1006CrQZ steel grade |
| CN111500825A (en) * | 2020-06-04 | 2020-08-07 | 北京首钢股份有限公司 | Method for controlling titanium content behind steelmaking converter |
Citations (7)
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|---|---|---|---|---|
| JPH06116626A (en) * | 1991-07-04 | 1994-04-26 | Nippon Steel Corp | Method for smelting low carbon steel by using vacuum refining furnace |
| CN101619378A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Method for deoxidizing molten steel |
| CN101768653A (en) * | 2008-12-30 | 2010-07-07 | 宝山钢铁股份有限公司 | Non-oriented silicon steel RH refinement and deoxidation control method |
| CN103173588A (en) * | 2013-03-23 | 2013-06-26 | 鞍钢股份有限公司 | RH (relative humidity) treatment method for low silicon-aluminum killed steel |
| CN103276151A (en) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | Deoxidation method of low-silicon steel by utilization of silicon alloys |
| CN104017949A (en) * | 2014-06-12 | 2014-09-03 | 鞍钢股份有限公司 | RH refining method for aluminium-free non-oriented silicon steel |
| CN104711394A (en) * | 2015-03-31 | 2015-06-17 | 山西太钢不锈钢股份有限公司 | Over-RH deoxidization method of low-alloy content steel |
-
2015
- 2015-08-21 CN CN201510518836.5A patent/CN105018681A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116626A (en) * | 1991-07-04 | 1994-04-26 | Nippon Steel Corp | Method for smelting low carbon steel by using vacuum refining furnace |
| CN101619378A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Method for deoxidizing molten steel |
| CN101768653A (en) * | 2008-12-30 | 2010-07-07 | 宝山钢铁股份有限公司 | Non-oriented silicon steel RH refinement and deoxidation control method |
| CN103173588A (en) * | 2013-03-23 | 2013-06-26 | 鞍钢股份有限公司 | RH (relative humidity) treatment method for low silicon-aluminum killed steel |
| CN103276151A (en) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | Deoxidation method of low-silicon steel by utilization of silicon alloys |
| CN104017949A (en) * | 2014-06-12 | 2014-09-03 | 鞍钢股份有限公司 | RH refining method for aluminium-free non-oriented silicon steel |
| CN104711394A (en) * | 2015-03-31 | 2015-06-17 | 山西太钢不锈钢股份有限公司 | Over-RH deoxidization method of low-alloy content steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349755A (en) * | 2020-03-17 | 2020-06-30 | 本钢板材股份有限公司 | Direct supply silicon control process for SAE1006CrQZ steel grade |
| CN111349755B (en) * | 2020-03-17 | 2022-02-08 | 本钢板材股份有限公司 | Direct supply silicon control process for SAE1006CrQZ steel grade |
| CN111500825A (en) * | 2020-06-04 | 2020-08-07 | 北京首钢股份有限公司 | Method for controlling titanium content behind steelmaking converter |
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Application publication date: 20151104 |