JPS5518525A - Desulfurizing method for hot iron - Google Patents
Desulfurizing method for hot ironInfo
- Publication number
- JPS5518525A JPS5518525A JP8931978A JP8931978A JPS5518525A JP S5518525 A JPS5518525 A JP S5518525A JP 8931978 A JP8931978 A JP 8931978A JP 8931978 A JP8931978 A JP 8931978A JP S5518525 A JPS5518525 A JP S5518525A
- Authority
- JP
- Japan
- Prior art keywords
- hot iron
- gas
- volume
- blown
- hot
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
PURPOSE:To increase remarkably desulfurization efficiency, by controlling an atmosphere contacting with hot iron surface at a prescribed gas concn., and by controlling the volume of dispersing region of rising foam formed with gas blown into the hot iron. CONSTITUTION:N2 gas or mixed gas of N2 gas with O2, CO2 is blown into hot iron 4 as a conveying gas together with powdered CaC2 of a particle diameter not larger than 0.2 mm from a conduit 7 through a fire-resistant lance pipe 3 to desulfurize the hot iron. The concns. of O2, CO2, CO in the atmosphere contacting with the surface of the hot iron is controlled respectively to not higher than 3 %, not higher than 5 %, and not higher than 12 %. Simultaneously the volume of inverted conical foam-dispersing region formed with the conveying gas blown into the hot iron, the gas which rising through the hot iron 4, is regulated to a volume not less than 1/15 that of hot iron contained in the vessel. The conveying gas having risen through the hot iron passes through the opening of the cover of the vessel at a speed pref. not smaller than 3.5 m/sec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8931978A JPS5518525A (en) | 1978-07-24 | 1978-07-24 | Desulfurizing method for hot iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8931978A JPS5518525A (en) | 1978-07-24 | 1978-07-24 | Desulfurizing method for hot iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5518525A true JPS5518525A (en) | 1980-02-08 |
Family
ID=13967337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8931978A Pending JPS5518525A (en) | 1978-07-24 | 1978-07-24 | Desulfurizing method for hot iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5518525A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5943806A (en) * | 1982-09-03 | 1984-03-12 | Nippon Steel Corp | Blowing method of gas |
-
1978
- 1978-07-24 JP JP8931978A patent/JPS5518525A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5943806A (en) * | 1982-09-03 | 1984-03-12 | Nippon Steel Corp | Blowing method of gas |
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