JPS56156710A - Heating method for cold charge for refining - Google Patents
Heating method for cold charge for refiningInfo
- Publication number
- JPS56156710A JPS56156710A JP6020980A JP6020980A JPS56156710A JP S56156710 A JPS56156710 A JP S56156710A JP 6020980 A JP6020980 A JP 6020980A JP 6020980 A JP6020980 A JP 6020980A JP S56156710 A JPS56156710 A JP S56156710A
- Authority
- JP
- Japan
- Prior art keywords
- cold charge
- limestone
- lime
- layer
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
PURPOSE:To prevent blow-by of high temperature combustion gas and to heat the cold charge layer uniformly by laying limestone or mixture of quick lime and limestone on the bottom of a converter and charging the cold charge on the layer, and heating from the bottom tuyeres. CONSTITUTION:Before charging the cold charge 12, limestone or mixture 16 of quick lime and limestone equivalent to 1-40kg per 1t of cold charge 12 is charged. Then, the cold charge 12 is charged on the lime layer and the charge is heated using bottom tuyeres 10. The charged lime 16 forms a lime layer on the bottom tyeres 10, and at the same time, covers the bottom 6 including refractory 15 around the tuyeres to protect the refractory from high temperature combustion gas and reversed current of oxygen. Further, a large amount of thermo-decomposed gaseous CO2 is generated and as a dispersion accelerator of high temperature gas. Thus, blow-by is prevented and the cold charge is heated uniformly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6020980A JPS56156710A (en) | 1980-05-07 | 1980-05-07 | Heating method for cold charge for refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6020980A JPS56156710A (en) | 1980-05-07 | 1980-05-07 | Heating method for cold charge for refining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56156710A true JPS56156710A (en) | 1981-12-03 |
Family
ID=13135523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6020980A Pending JPS56156710A (en) | 1980-05-07 | 1980-05-07 | Heating method for cold charge for refining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56156710A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012172249A (en) * | 2011-02-24 | 2012-09-10 | Jfe Steel Corp | Refining method and method for producing molten steel |
| WO2013190591A1 (en) * | 2012-06-18 | 2013-12-27 | Ｊｆｅスチール株式会社 | Refining method and molten steel production method |
| CN110760639A (en) * | 2019-10-18 | 2020-02-07 | 甘肃酒钢集团宏兴钢铁股份有限公司 | System and method for steelmaking by spraying limestone powder to bottom of converter |
-
1980
- 1980-05-07 JP JP6020980A patent/JPS56156710A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012172249A (en) * | 2011-02-24 | 2012-09-10 | Jfe Steel Corp | Refining method and method for producing molten steel |
| WO2013190591A1 (en) * | 2012-06-18 | 2013-12-27 | Ｊｆｅスチール株式会社 | Refining method and molten steel production method |
| CN110760639A (en) * | 2019-10-18 | 2020-02-07 | 甘肃酒钢集团宏兴钢铁股份有限公司 | System and method for steelmaking by spraying limestone powder to bottom of converter |
| CN110760639B (en) * | 2019-10-18 | 2021-09-28 | 甘肃酒钢集团宏兴钢铁股份有限公司 | System and method for steelmaking by spraying limestone powder to bottom of converter |
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