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| Number | Title | Issue Date |
| 4407490 | Method and a means for introducing close-grained carbonaceous fuels into an iron melting bath A method and a means for introducing close-grained carbonaceous fuels, which are suspended in a carrier gas, and oxygen into an iron melting bath are described. In this method the fuel and the oxygen can be alternately introduced through the same introduc... | 10/04/1983 |
| 4356035 | Steelmaking process Oxygen is introduced onto the surface of a molten ferrous metal through at least one water-cooled lance disposed above the melt surface while an oxygen free gas in which is entrained ground solids is intermittently introduced into the molten ferrous metal... | 10/26/1982 |
| 4348227 | Process for producing steel with low hydrogen content in a through-blowing oxygen converter In a process for the production of steel with low hydrogen content in a through-blowing oxygen converter with nozzles arranged below the bath surface in the refractory brick lining, the nozzles composed of concentric pipes for introducing oxygen sheathed ... | 09/07/1982 |
| 4262516 | Pierced metal tube blanks and methods of making such blanks A pierced metal blank having an annular cross-section with one end closed and the other end open for use in the manufacture of seamless tubes has a bore with portions of different diameters, the portion of larger diameter, which is adjacent the open end o... | 04/21/1981 |
| 4249719 | Tuyere for the injection of reaction gas A tuyere for the injection of both a refining gas such as oxygen into a melting or refining vessel, and a fluid protective medium such as a hydrocarbon gas or a liquid surrounding the injected refining gas, in which there is a solid center in the pipe thr... | 02/10/1981 |
| 4198230 | Steelmaking process A steelmaking process is described in which solid sources of iron (e.g. scrap) are charged into a convertor equipped with tuyeres through which air, oxygen or mixtures thereof can be blown into the convertor. The process includes (1) a preheating phase in whic... | 04/15/1980 |
| 4171971 | Method of manufacturing hot metal A method of manufacturing hot metal from iron oxide in a shaft furnace by means of reduction with CO and H2 is described in the case of which iron oxide and coke are placed in the shaft furnace. For the purpose of the coke combustion, oxygen or... | 10/23/1979 |
| 4123259 | Method for supplying thermal energy to steel melts A procedure is described for supplying thermal energy to a steel melt by burning a fuel in a melt containing at most 0.10% carbon, by means of oxygen. Both the fuel and the oxygen are introduced into the steel melt beneath the surface of the melt. The met... | 10/31/1978 |
| 4062657 | Method and apparatus for desulphurizing in the gasification of coal This application describes a process and apparatus for gasifying sulphur bearing coal in a molten iron bath which is covered with a sulphur absorbing slag. In order to make the process practical, the hot liquid slag is transferred to a second vessel in wh... | 12/13/1977 |
| 4050681 | Apparatus for the controlled feeding of a refining gas and of a fluid protective medium An improved apparatus for supplying the refining gas and protective media utilized in the refining process described in U.S. Pat. No. 3,706,549 issued Dec. 19, 1972, including valves provided in the supply lines for preventing malfunctioning of the proces... | 09/27/1977 |
| 4047707 | Process and converter for refining liquid metals An improvement in the refining of molten metals in a converter by means of oxygen introduced into the metal through tuyeres which include two concentric pipes, oxygen being passed into the melt through the central pipe and a protective fluid being passed ... | 09/13/1977 |
| 4023781 | Tuyere for metallurgical vessels This invention relates to a process for refining metals in a refining vessel, by means of a tuyere embedded in the bottom or sidewall of the vessel and through which a refining gas is blown into the vessel. The tuyere is composed of at least three concent... | 05/17/1977 |
| 4023713 | Apparatus for batchwise feeding of powders or particles Apparatus for batchwise feeding of powders or other particulate materials from a pressurized supply vessel with a sealable discharge orifice including a movable sealing-and-metering member and a seal against which it seals during periods of non-discharge.... | 05/17/1977 |
| 3983734 | Method of and apparatus for shaping metal billets A method of shaping the external surface of a metal billet which comprises holding the billet stationary and moving a pair of grooved rolls which are idly rotatably supported over the billet so that the billet passes through a gap between the rolls and gu... | 10/05/1976 |
| 3950161 | Process for increasing the life of basic refractory linings in hearth-type furnaces An increase in the life of basic refractory linings in hearth type refining furnaces and a decrease in tap-to-tap time is achieved by the use of at least one refining tuyere which consists of two concentric pipes. The central pipe feeds oxygen into the me... | 04/13/1976 |
| 3945820 | Process and immersion lances for introducing oxygen into a metal melt Immersion lances for refining metal melts in hearth type vessels including open hearth and electric furnaces. The lances are movable into and out of the metal melt and comprise an oxygen pipe, a cooling medium pipe surrounding the oxygen pipe and a refrac... | 03/23/1976 |
| 3938790 | Method and converter for refining pig-iron into steel Pig-iron is refined into steel by blowing oxygen and a protective screen of an encasing gas through injecting means located at or near the bottom of a converter containing a melt of molten metal. The encasing gas while protecting the injecting means, allo... | 02/17/1976 |
| 3932172 | Method and converter for refining pig-iron into steel Pig-iron is refined into steel by blowing oxygen and a protective screen of an encasing gas through injecting means located at or near the bottom of a converter containing a melt of molten metal. The encasing gas while protecting the injecting means, allo... | 01/13/1976 |
