JPS56116815A - Controlling method of switching of bottom blowing gas in metal refining furnace - Google Patents
Controlling method of switching of bottom blowing gas in metal refining furnaceInfo
- Publication number
- JPS56116815A JPS56116815A JP1742980A JP1742980A JPS56116815A JP S56116815 A JPS56116815 A JP S56116815A JP 1742980 A JP1742980 A JP 1742980A JP 1742980 A JP1742980 A JP 1742980A JP S56116815 A JPS56116815 A JP S56116815A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- time
- switching
- valve
- flow
- 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.)
- Granted
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 maintain a minimum of total gas flow at switching time, by a method wherein gas is switched from the preceding gas to the following, using a valve opening that provides a minimum flow to prevent molten steel from entering the tuyere, and under a virtual condition that there is no mushroom at each end of the tuyere. CONSTITUTION:The preceding gas A is maintained at a constant flow rate up to time e; and in order to switch it to the following gas B, the valve of the preceding gas A is reduced, at time f, to the specified opening at which molten metal does not enter the tuyere, if mushroom drops. At time g, the valve of the following gas B is made to the specified opening, then, at time h, each gas flow becomes nearly the same, and total flow reaches a peak. Then, a time g, the valve of the preceding gas A is closed and, at time j, the flow rate of the preceding gas A is made to 0. At this time, the valve of the following gas B is maintained at the specified opening, so that following gas B also corresponds. At time k, the bollowing gas B is controlled to the flow that meets the requirement of flowing operation after switching gas, and gas switching is completed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1742980A JPS56116815A (en) | 1980-02-15 | 1980-02-15 | Controlling method of switching of bottom blowing gas in metal refining furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1742980A JPS56116815A (en) | 1980-02-15 | 1980-02-15 | Controlling method of switching of bottom blowing gas in metal refining furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56116815A true JPS56116815A (en) | 1981-09-12 |
JPS6136051B2 JPS6136051B2 (en) | 1986-08-16 |
Family
ID=11943766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1742980A Granted JPS56116815A (en) | 1980-02-15 | 1980-02-15 | Controlling method of switching of bottom blowing gas in metal refining furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56116815A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58185710A (en) * | 1982-04-22 | 1983-10-29 | Kawasaki Steel Corp | System for switching gas in bottom blown converter |
JPH04276008A (en) * | 1991-03-01 | 1992-10-01 | Nippon Steel Corp | Method for operating bottom blowing converter |
-
1980
- 1980-02-15 JP JP1742980A patent/JPS56116815A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58185710A (en) * | 1982-04-22 | 1983-10-29 | Kawasaki Steel Corp | System for switching gas in bottom blown converter |
JPS6221846B2 (en) * | 1982-04-22 | 1987-05-14 | Kawasaki Seitetsu Kk | |
JPH04276008A (en) * | 1991-03-01 | 1992-10-01 | Nippon Steel Corp | Method for operating bottom blowing converter |
Also Published As
Publication number | Publication date |
---|---|
JPS6136051B2 (en) | 1986-08-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56116815A (en) | Controlling method of switching of bottom blowing gas in metal refining furnace | |
DE69004054D1 (en) | Method and device for the continuous tapping of metal and slag in the molten state. | |
SE8004913L (en) | PROCEDURE FOR CONTROLING THE EXHAUST VALVE FOR A BOILER | |
JPS5757819A (en) | Converter steel making method | |
ES8406036A1 (en) | Stopper for casting furnaces and other metallurgical vessels. | |
JPS5757818A (en) | Method for controlling changeover of gas of metal refining furnace | |
JPS5713113A (en) | Method for stirring molten steel in converter | |
JPS5736050A (en) | Method for controlling secondary cooling water in continuous casting | |
JPS57145920A (en) | Batch type continuous refining method of molten pig iron | |
ATE144615T1 (en) | SLOG CONTROL APPARATUS AND METHOD | |
JPS52106397A (en) | Treatment of molten blast furnace slag | |
JPS579821A (en) | Method of addition of auxiliary raw material or the like into ladle | |
Rodal | Operational Experience With the Tap Hole Valve on the Arc Furnace at the Texas Works of United States Steel Corporation | |
SU1093706A1 (en) | Device for controlling metal blowing | |
JPS5797850A (en) | Method for dehydrogenation of molten steel in intermediate vessel in continuous casting | |
JPS5893809A (en) | Refining method for molten steel | |
ES8305114A1 (en) | Valve suitable for controlling teeming from furnace tapholes | |
JPS56141953A (en) | Method for controlling pouring flow rate of molten steel for continuous casting | |
JPS55154515A (en) | Desulfurizing method in front of blast furnace | |
GB2003556A (en) | Control of flow of molten metal from casting vessels | |
JPS5439312A (en) | Method of operating blast furnace | |
JPS57155311A (en) | Steel making method | |
JPS57137415A (en) | Steel making method for chromium-containing steel | |
JPS5719146A (en) | Controller for casting machine | |
JPS5511138A (en) | Preventing method for molten slag from running off during tapping |