| Patent Number |
Title Of Patent |
Date Issued |
| 4407490 |
Method and a means for introducing close-grained carbonaceous fuels into an iron melting bath |
October 4, 1983 |
| 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 introduction passage of a tuyere into an i |
| 4348227 |
Process for producing steel with low hydrogen content in a through-blowing oxygen converter |
September 7, 1982 |
| 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 by a protective medium, and with |
| 4330326 |
Method and a means for introducing close-grained carbonaceous fuels into a molten iron bath |
May 18, 1982 |
| A method and a means for introducing close-grained carbonaceous fuels, which are suspended in a carrier gas, and oxygen into a molten iron bath are described.In this method the fuel and the oxygen can be alternately introduced through the same introduction passage of a tuyere into a molt |
| 4261551 |
Method and means for supplying nozzles with gaseous and/or liquid hydrocarbons |
April 14, 1981 |
| The invention describes a method and a means for supplying nozzles comprising concentric pipes with gaseous and/or liquid hydrocarbons in which oxygen or oxygen-containing gases are simultaneously introduced into a converter. In so doing, the gases and/or liquid hydrocarbons are cond |
| 4249719 |
Tuyere for the injection of reaction gas |
February 10, 1981 |
| 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 through which the refining gas i |
| 4200453 |
Process for the production of nickel alloys |
April 29, 1980 |
| The process for production of a nickel alloy having a maximum sulphur content of 0.05% in a converter by treatment of a crude ferro-nickel melt having a sulphur content of about 0.10% to 0.50% with oxygen and lime to form a slag and removal of the slag is improved by introducing at least |
| 4198230 |
Steelmaking process |
April 15, 1980 |
| 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 which carbon carriers (fuels) are |
| 4196159 |
Process for increasing the life of the refractory masonry of metallurgical vessels |
April 1, 1980 |
| A process for increasing the life of refractory masonry of furnaces and metallurgical vessels in which the masonry is exposed to oxidizing atmospheres at high temperatures and/or molten metals or slags which are highly erosive, which process consists in depositing carbon in the pores |
| 4195985 |
Method of improvement of the heat-balance in the refining of steel |
April 1, 1980 |
| In the method of producing steel in a converter equipped with tuyeres that are shrouded with a protective medium which are disposed below the melt surface, oxygen is also introduced above the melt during at least a major part of the refining time with sufficient velocity to suck in large |
| 4171971 |
Method of manufacturing hot metal |
October 23, 1979 |
| A method of manufacturing hot metal from iron oxide in a shaft furnace by means of reduction with CO and H.sub.2 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 a gas containing oxygen is introduced |
| 4123259 |
Method for supplying thermal energy to steel melts |
October 31, 1978 |
| 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 method permits an increase in the |
| 4062657 |
Method and apparatus for desulphurizing in the gasification of coal |
December 13, 1977 |
| 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 which it is desulfurized by con |
| 4050681 |
Apparatus for the controlled feeding of a refining gas and of a fluid protective medium |
September 27, 1977 |
| 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 process. |
| 4047707 |
Process and converter for refining liquid metals |
September 13, 1977 |
| 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 into the melt as a sheath or |
| 4023781 |
Tuyere for metallurgical vessels |
May 17, 1977 |
| 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 concentric pipes, the refining gas b |
| 4023713 |
Apparatus for batchwise feeding of powders or particles |
May 17, 1977 |
| 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. |
| 3983734 |
Method of and apparatus for shaping metal billets |
October 5, 1976 |
| 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 guiding the paths of the rolls to p |
| 3950161 |
Process for increasing the life of basic refractory linings in hearth-type furnaces |
April 13, 1976 |
| 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 melt below the bath surface, and a |
| 3945820 |
Process and immersion lances for introducing oxygen into a metal melt |
March 23, 1976 |
| 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 refractory casing which is wear res |
| 3938790 |
Method and converter for refining pig-iron into steel |
February 17, 1976 |
| 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, allows it to be consumed at substanti |
| 3932172 |
Method and converter for refining pig-iron into steel |
January 13, 1976 |
| 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, allows it to be consumed at substanti |
