JPS55125216A - Converter blowing method for controlling phosphorus content - Google Patents
Converter blowing method for controlling phosphorus contentInfo
- Publication number
- JPS55125216A JPS55125216A JP3128379A JP3128379A JPS55125216A JP S55125216 A JPS55125216 A JP S55125216A JP 3128379 A JP3128379 A JP 3128379A JP 3128379 A JP3128379 A JP 3128379A JP S55125216 A JPS55125216 A JP S55125216A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- feo
- blowing
- molten steel
- converter
- 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
- C21C5/32—Blowing from above
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
PURPOSE:To provide dephosphorization effect by estimating the FeO amount in slag through application of the solidifying temperature of the slag sampled from the molten steel surface in a converter to a CaO-FeO-SiO2 3-component-system phase diagram and controlling blow from this estimated value. CONSTITUTION:The slag floating on the molten steel surface in the converter is sampled without interrupting blowing, its solidifying temperature is measured and this solidifying temperature is applied to the CaO-FeO-SiO2 3-component phase diagram of Fig. A. The FeO% in the slag thus obtained is converted to the P% in the melting by Fig. B. Namely, if the estimated P% in the molten steel coincides with the P% of steel kind being the object of blowing, the blowing is continued as it is. If this estimated value is higher than the target value, the degree of blow is changed over to soft so as to promote desulphurization so that the disintegration of slag is accelerated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3128379A JPS55125216A (en) | 1979-03-17 | 1979-03-17 | Converter blowing method for controlling phosphorus content |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3128379A JPS55125216A (en) | 1979-03-17 | 1979-03-17 | Converter blowing method for controlling phosphorus content |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55125216A true JPS55125216A (en) | 1980-09-26 |
Family
ID=12326980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3128379A Pending JPS55125216A (en) | 1979-03-17 | 1979-03-17 | Converter blowing method for controlling phosphorus content |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125216A (en) |
-
1979
- 1979-03-17 JP JP3128379A patent/JPS55125216A/en active Pending
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