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7611563 |
Multifunction injector and relative combustion process for metallurgical treatment in an electric arc furnace
A multifunction injector ( 10, 11, 12 ) comprising a De Laval nozzle ( 20 ) adapted to act as a burner at subsonic or supersonic speed, combined with a plurality of nozzles ( 31, 32 ) for fuel and...
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7591876 |
Injection of solids into liquids by means of a shrouded supersonic gas jet
A method of introducing a solid particulate reagent into a bath of metallurgical liquid comprises a step of introducing a solid particulate reagent into a main supersonic gas jet. The main...
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7521035 |
Method for regenerating a residual substance that contains sulfur and an atomizing burner suited for carrying out said method
A method for the regeneration of residues containing sulphur is characterized in that a droplet stream containing fuel is introduced into the reactor simultaneously with the droplet stream...
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7452401 |
Oxygen injection method
A method of injecting oxygen into a melt located within a metallurgical furnace having a heated furnace atmosphere in which oxygen and fuel is injected into 1 or more nozzles having passageways of...
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7297180 |
Method for operating a vacuum vessel with a coherent jet
A method for operating a vacuum vessel with a coherent jet wherein vacuum conditions are established within the vessel and an anchored or attached flame envelope resulting from subsonic velocity...
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6514310 |
Process for injection of a gas with the aid of a nozzle
The electric arc furnace is equipped with a supersonic injector comprising a so-called Laval nozzle arranged at a certain distance above the bath. The dimensions of the nozzle are calculated as a...
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5961159 |
Quick-coupling part arrangement
A first quick-coupling part can be brought into interaction with a second quick-coupling part via an interaction portion. The quick-coupling parts are held together with locking members. The...
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5902372 |
Process and apparatus for processing a shredder light fraction in a melt
A process and apparatus for processing a shredder light fraction including multi-duct nozzle having at least an end section positionable within a metallurgical vessel containing a molten metal...
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5822357 |
Process for melting a charge in a furnace
A charge of scrap is melted in a furnace (1) with post-combustion of the fumes by injection of an oxygenated gas into the space in the furnace above the charge. During periods of post-combustion,...
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5814125 |
Method for introducing gas into a liquid
A method for introducing gas into a liquid wherein a gas stream is ejected from a lance spaced above the liquid surface and directed from the lance onto the liquid surface. The gas retains...
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5572544 |
Electric arc furnace post combustion method
A method for carrying out post combustion in an electric arc furnace comprising forming a preferential gas stream within the electric arc furnace, concentrating carbon monoxide within the gas...
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5444733 |
Electric arc furnace with alternative sources of energy and operating method for such electric furnace
Electric arc furnace with alternative sources of energy, which functions with direct current or alternating current and comprises at least one lance (12) to inject pure or combined oxygen above the...
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5417740 |
Method for producing steel
A method of steelmaking in an at least partially refractory lined furnace. The process includes the steps of retaining a portion of a hot liquid slag from a previous heat, and altering the retained...
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4497656 |
Steel making method
A method of producing steel from ferrous hot metal containing carbon includes the steps of delivering oxygen and a surrounding sheath of hydrocarbon shielding fluid to the metal and beneath its...
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4450005 |
Metal refining method
In a method of refining a metal by blowing a refining gas surrounded by a cooling gas into the melt of the metal to be refined using a concentric multi-tube system nozzle situated beneath the...
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4409024 |
Top-and-bottom blown converter steel making process
In the top-and-bottom blown converter steel making process, a process is provided wherein the position of the bottom-blowing tuyeres is set such that the maximum X 0 among the distances X between...
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4405365 |
Method for the fabrication of special steels in metallurgical vessels
The device consists of a retractible tuyere which can be used with different types of steel melting furnaces, or any other metallurgical vessel. Said tuyere is introduced in the liquid steel bath...
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4401466 |
Process for protection of nozzles and refractory lining of a vessel for refining molten metal
A process for protecting oxygen injection nozzles and the surrounding refractory lining of a molten metal refining vessel having such oxygen injection nozzles beneath the bath surface. The...
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4394165 |
Method of preliminary desiliconization of molten iron by injecting gaseous oxygen
The present invention provides a method for preliminary treatment of molten iron from a blast furnace wherein only desiliconization of the iron is effected. Gaseous oxygen is injected into the...
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4385753 |
Tuyere for the simultaneous and separate introduction of at least one gas and one powder material
Tuyere for the processing of metals in the liquid, solid or pasty state, and capable of introducing simultaneously and separately a gas and a powdered material. The tuyere comprises at least two...
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4365992 |
Method of treating ferrous metal
A method of treating ferrous metal includes the steps of containing in a metallurgical vessel a quantity of ferrous metal which is at least partially solid in form, entraining finely divided carbon...
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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...
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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...
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4336064 |
Method of improving the performance of submerged oxygen injectors
In the injection of oxygen through a refractory lined wall into a molten metal, for example, pig iron, the injected oxygen is surrounded by a stream of a protective fluid to diminish erosion of the...
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4334921 |
Converter steelmaking process
An improved converter steelmaking process that achieves a great increase in the refining capability of top-blown oxygen is provided. The process applies to an oxygen top-blowing converter that also...
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4302244 |
Steel conversion method
A steel conversion method includes the steps of delivering a first quantity of oxygen and a surrounding sheath of hydrocarbon shielding fluid beneath the level of a quantity of molten ferrous metal...
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4272286 |
Metallurgical vessel
A metallurgical vessel has releasably coupled, semicylindrical upper and lower sections arranged such that the axis of revolution of one section lies in a plane normal relative to the rotational...
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4261551 |
Method and means for supplying nozzles with gaseous and/or liquid hydrocarbons
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...
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4225341 |
Refining iron in a converter
Molten iron is refined in a converter whose bottom has tuyeres with coaxial ducts. An oxidising gas such pure oxygen is blown through the inner duct while a protective fluid such as a hydrocarbon...
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4200453 |
Process for the production of nickel alloys
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...
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4195985 |
Method of improvement of the heat-balance in the refining of steel
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...
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4192675 |
Process for decarburizing ferro-manganese
Ferro-manganese is decarburized from a carbon content of as high as 7.5% down to 2% or less by blowing an oxidizing gas into the melt in two stages through one or more immersed tuyeres protected...
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4165980 |
Method of rapidly decarburizing ferro- alloys with oxygen
The invention relates to a method of rapidly decarburizing a high-carbon ro-alloy with oxygen for avoiding an undesirable oxidation of the principal alloying elements, especially chromium or...
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4139370 |
Method of refining ferro-alloys
A ferro-alloy, namely ferrochrome or ferromanganese, is refined by being heated to at least 100° C above its melting point to form a bath whereupon oxygen is blown into the melt, below the bath...
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4139368 |
Metallurgical method
A method of treating ferrous metal in a metallurgical vessel having a plurality of two-pipe tuyeres extending generally upwardly through the vessel bottom and in spaced apart relation relative to...
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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...
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4093452 |
Refining liquid metal
A method and apparatus for treating a bath of liquid iron or steel by submerged injection of a gas or gas-entrained particulate re-agents. Injection is through a tuyere occludable either by a...
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4081268 |
Method of protecting tuyeres for upwardly blowing pure oxygen through the bottom of steel converters
In use of a steel converter into which oxygen is blown through tuyeres, each tuyere being protected by flow of a protective liquid containing hydrocarbons along peripheral passage means in the...
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4071355 |
Recovery of vanadium from pig iron
An improved method is described for processing pig iron containing vanadium to obtain a slag containing at least 8 percent vanadium and having a vanadium to iron ratio of at least 0.5 which is...
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4052197 |
Process for making steel from pig iron
A process for continuous refining in which liquid pig iron is supplied to a pig iron melt which is at least partially refined while said melt is being intensively agitated, the refining means...
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4047936 |
Process for refining hot metal to steel
An apparatus for refining hot metal to steel including a converter provided in the bottom thereof with imbedded concentric double-tube injectors for introducing oxygen enveloped by a shielding gas...
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4009024 |
Process for regeneration and reuse of steelmaking slag
A process for the regeneration of slag involves treating the slag after the steel has been removed from the steelmaking heat. Oxygen and a fluid hydrocarbon fuel are lanced into the molten slag to...
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4007035 |
Method of using an expendable tap hole tuyere in open hearth decarburization
A process of making steel in an open hearth furnace utilizing an expendable tuyere inserted within the furnace tap-hole for injecting oxygen into the furnace charge to assist in oxidizing...
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4001012 |
Method of producing stainless steel
A process for producing stainless steel whereby unrefined molten iron is partially refined by blowing oxygen therethrough to slag the phosphorus; removing the slag therefrom; adding...
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3998626 |
Method for air pollution control combined with safe recovery and control of gases from a bottom-blown steel converter vessel
A gas collector hood is located close to the mouth of a converter vessel and has a diameter which is not much greater than the mouth of the vessel. A mixture of oxygen together with entrained...
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3997334 |
Introduction of a liquid into a receptacle such as a converter
A liquid fuel or other liquid is supplied to a supply line which communicates with an injection conduit opening out into a receptacle such as a steelmaking converter. The supply line includes a...
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3992194 |
Method and apparatus for use in the treatment of metals in the liquid state
In a method of treatment of liquid metal by blowing in at least one fluid in the form of jets emitted by blast pipes, the jets being arranged in at least two groups of which one group is supplied...
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3985550 |
Method of producing low sulfur steel
A method of producing steel by the bottom blown basic oxygen process in which the residual sulfur content is reduced to an exceptionally low level. The process comprehends a standard bottom blown...
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3960546 |
Method for eliminating nose-skulls from steelmaking vessels
Nose-skulls which normally form in the nose section of steelmaking vessels such as the bottom-blown oxygen steelmaking vessel, are prevented from forming, or are removed after forming, by injecting...
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3954445 |
Method of controlling temperature in Q-BOP
A method of producing steel in a bottom-blown oxygen steelmaking vessel wherein the use of scrap steel in the original charge is minimized or eliminated, and the final temperature of the charge is...
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