US768265A - Method of producing open-hearth steel. - Google Patents
Method of producing open-hearth steel. Download PDFInfo
- Publication number
- US768265A US768265A US17579403A US1903175794A US768265A US 768265 A US768265 A US 768265A US 17579403 A US17579403 A US 17579403A US 1903175794 A US1903175794 A US 1903175794A US 768265 A US768265 A US 768265A
- Authority
- US
- United States
- Prior art keywords
- producing open
- hearth steel
- steel
- hearth
- slag
- 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.)
- Expired - Lifetime
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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
- C21C5/04—Manufacture of hearth-furnace steel, e.g. Siemens-Martin steel
Definitions
- My present invention consists in adding suitable quantities of titaniferous iron ore in the basic open-hearth furnace.
- the addition of this material because of the titanic acid present, makes the slag much thinner, and thus serves the purpose for which fluor-spar has previously been used.
- the iron oxid of the ore acts to some extent upon the carbon in the bath to reduce the carbon contents of the same. I have found that in this Way ores containing very large percentages of titanic acid may be used to advantage, and
- titaniferous ore to be added must, of course, be dependent upon local conditions, as it is necessary for the melter to properly control the character of the slag.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Manufacture Of Iron (AREA)
Description
UNITED STATES Patented August 23, 1904.
PATENT OFF C HUGO oARLssoN, OF SYDNEY, CANADA, ASSIGNOR oFoNE-H LF TO 7 JAMES H. LE FEVRE, or SYDNEY, CANADA.
METHOD OF PRODUCING OPEN-HEARTH STEEL.
SPECIFICATION forming part of Letters PatentNo. 768,265, dated August 23, 1904. Application filed October 5, 1903. Serial No. 1 775,794. (No specimens.)
To all whom, it may concern.-
Be it known that I, Hueo CARLssoN. a citizen of the United States, and a resident of practice thereof without deteriorating the quality of the steel, and also has for an'objeot theutilization of a materialtitaniferous iron orethat is now of substantially no value.
In carrying on the basic open-hearth process of making steel it is usual to increase the basicity of the slag in order that it may more effectuallyremove some of the impurities from the metal by adding lime or limestone to the bath. When, however, a certain amount of lime has been added, the slag becomes too thick, and if it is then desired to add more lime it has been necessary to use considerable fluor-spar in order to increase the fluidity of the slag and to allow of more lime being used.
My present invention consists in adding suitable quantities of titaniferous iron ore in the basic open-hearth furnace. The addition of this material, because of the titanic acid present, makes the slag much thinner, and thus serves the purpose for which fluor-spar has previously been used. Moreover, the iron oxid of the ore acts to some extent upon the carbon in the bath to reduce the carbon contents of the same. I have found that in this Way ores containing very large percentages of titanic acid may be used to advantage, and
I. believe that the higher the titanic acid in the ore the better. The particular amount of titaniferous ore to be added must, of course, be dependent upon local conditions, as it is necessary for the melter to properly control the character of the slag.
It is well known that there are large do- I posits of titaniferous iron ores'existing in different parts of the World; buthitherto these ores have been substantially without value. Attempts have been made to obtain the iron from them by smelting them inthe ordinary manner in a blast-furnace, but this produces highly-refractory slags, which seriously interfere With the action of the blast-furnace. These heretofore unavailable ores vary considerably in the percentage of titanic acid contained inthem, but range usually from about two per cent. to about twenty per cent, or even higher. By my invention these ores become at once of value to the steel-maker, since the fluor-Spar hitherto used, which is compar ativelye'xpensive, may be eliminated or partially eliminated.
Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is
The herein-described improvement in the basic open-hearth process which consists in controlling the character of slag produced by adding to the other materials employed in said process, a quantity of titaniferous ore suitable for said purpose, substantially as described.
In testimony whereof I have signed my name i to this specification in the presence of two subscribing Witnesses.
HUGO OARLSSON. Witnesses:
EDWIN Snenn, JOHN O. GEMPLER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17579403A US768265A (en) | 1903-10-05 | 1903-10-05 | Method of producing open-hearth steel. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17579403A US768265A (en) | 1903-10-05 | 1903-10-05 | Method of producing open-hearth steel. |
Publications (1)
Publication Number | Publication Date |
---|---|
US768265A true US768265A (en) | 1904-08-23 |
Family
ID=2836751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17579403A Expired - Lifetime US768265A (en) | 1903-10-05 | 1903-10-05 | Method of producing open-hearth steel. |
Country Status (1)
Country | Link |
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US (1) | US768265A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2457055A (en) * | 1945-05-21 | 1948-12-21 | Armco Steel Corp | Production of stainless steel |
-
1903
- 1903-10-05 US US17579403A patent/US768265A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2457055A (en) * | 1945-05-21 | 1948-12-21 | Armco Steel Corp | Production of stainless steel |
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