Patents Examined by P. D. Rosenberg
  • Method for controlling exhaust gases in oxygen blown converter
    Patent number: 4314694
    Abstract: A method for recovering unburnt exhaust gases in an oxygen converter, characterized by the control of an exhaust gas damper by a control signal obtained by signal-processing, in accordance with the set functional formulae, an exhaust gas damper control signal obtained from a pressure differential between throat pressure and atmospheric pressure, and an exhaust gas damper prediction control signal obtained by continuously detecting the quantity of oxygen fed, the quantity of secondary raw material charged, the composition of exhaust gases and the flow rate of exhaust gases to calculate the quantity of furnace generated gases and the quantity of combustion exhaust gases at throat.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: February 9, 1982
    Assignee: Nippon Steel Corporation
    Inventors: Yuziro Ueda, Toru Yoshida, Michiyasu Honda
  • Shroud support and method for shroud engagement with teeming valve
    Patent number: 4313596
    Abstract: A shroud support or tube holder is disclosed for use with a teeming vessel having a gate valve. In the instance disclosed, the gate valve is a sliding valve, and the shroud is positioned by means of a boom in pour tube relationship with the nozzle of the valve. The boom is pivotally mounted for rotation in a horizontal plane, and axially slidable for elevation and lowering. The boom is urged upwardly by means of a dead weight system which, when translated to the length of the boom to a shroud holder, permits the shroud to be engaged with the pour tube portion of the vessel at a predetermined load. The means for pivoting the shroud or tube for removal from the vessel which is being filled has a locked position to lock the shroud against lateral movement which can multiply the internal forces and crack the internal nozzle, and yet can be pivoted at an angle for easy removal from the vessel.
    Type: Grant
    Filed: October 29, 1979
    Date of Patent: February 2, 1982
    Assignee: Flo-Con Systems, Inc.
    Inventor: Patrick D. King
  • Method for adding unalloyed magnesium metal to molten cast iron
    Patent number: 4313758
    Abstract: Finely sized unalloyed magnesium metal is blended with finely sized ferrosilicon alloy. The blended mixture is placed in metal containers and plunged into molten cast iron.
    Type: Grant
    Filed: October 1, 1980
    Date of Patent: February 2, 1982
    Assignee: Union Carbide Corporation
    Inventors: William A. Henning, Henry F. Linebarger
  • Method of forming large, minimal grain copper billet
    Patent number: 4312667
    Abstract: A recrystallized copper billet in excess of one and one-half inches in diameter is formed as an essentially single-grain or crystal copper. A high conductivity, oxygen-free copper billet is subjected to mechanical surface cleaning and to a "bright dip" bath to chemically clean the surface. The copper billet is located in a similar sized graphite crucible and induction-heated in a vacuum chamber to a modest temperature for outgassing of said crucible. The heating is increased to melt the copper and then is reduced in steps to produce a copper equilibrium temperature about seventeen degrees centigrade above the melting point of the copper. A slow non-directional and natural cooling at the rate of about three to fifteen degrees per hour is created until total solidification and recrystallization occurs.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: January 26, 1982
    Assignee: McGraw-Edison Company
    Inventor: Jacques P. Guertin
  • Homogenization of metal using gas
    Patent number: 4311518
    Abstract: In the homogenization of molten metal with a gas, the gas is delivered to agitate the molten metal in a vessel, through an injector tube having a fine bore effective to prevent penetration of molten metal into and along the bore; when injection of gas is discontinued, molten metal is allowed to solidify on the tip of the tube to seal it; when gas is to be delivered to a second load of molten metal in the vessel, it is delivered, at least initially, at a pressure effective to unseal the tube at the tip to permit entry of the gas into the second load to agitate the molten metal and thereby homogenize it; the injector tube can be used for successive batches of molten metal without maintenance.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: January 19, 1982
    Assignee: Canadian Liquid Air Ltd./Air Liquide Canada Ltee
    Inventors: Guy Savard, Robert G. H. Lee
  • Process for the recovery of nickel, cobalt and manganese from their oxides and silicates
    Patent number: 4311520
    Abstract: A process for the recovery of nickel, cobalt or manganese from their oxides or silicates wherein such process, which requires the application of heat, is improved by utilizing microwave energy as the source of heat. The microwave energy may be utilized to cause the reduction of these values enabling such reduced values to then be recovered by conventional leaching processes. The microwave energy may also be used in conjunction with the chlorination of such values to produce their chlorides which are subsequently separated from the gangue and then processed by conventional means to obtain the metal values.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: January 19, 1982
    Assignee: Cato Research Corporation
    Inventors: Paul R. Kruesi, Veryl H. Frahm, Jr.
  • Process for the preparation of a mixture comprising a solid phase and a liquid phase of a metal alloy, and device for its performance
    Patent number: 4310352
    Abstract: A process for the preparation of a mixture comprising a solid phase and a liquid phase of a metal alloy, in which the concentration of the said solid phase has a pre-established value, is described; it comprises at least a first stage for bringing the said alloy into a completely fluid state, a second stage for creating a constant range flow of the mixture between an inlet section and an outlet section, a third stage for subdividing in a longitudinal direction the said flow into a plurality of flow sections, each of which has a predetermined length and in each of which the flow is subdivided into at least two independent streams, and a fourth stage for making each of the said streams flow along such a trajectory as to obtain in each of the said streams of each flow section a confluence of parts of both streams of the immediately preceding section.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: January 12, 1982
    Assignee: Centro Ricerche Fiat S.p.A.
    Inventors: Giovanni Manfre, Jonathan Mironi, Renzo Moschini
  • Cooled components for furnaces
    Patent number: 4310147
    Abstract: To improve the resistance to abrasion during use of cooled components, such as tuyeres and stack and bosh coolers, in furnaces a refractory or a metal with greater abrasion resistance than the metal, which is normally copper or a copper alloy, used for the main body of the component is introduced during casting into the cast walls of the components. The added material may be in the form of one or more segments, a mesh, or in discrete particles and is located at or just below the surface at the nose (24) of the component. Examples of the materials which may be used are particles (44,48) of so-called "hard metals" which comprise hard sintered carbides, such as tungsten carbide; stainless steel meshes and expanded elements (10,40,42) of varying thickness; and various compressed refractories capable of withstanding the thermal shock in a matrix of copper.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: January 12, 1982
    Inventor: Colin F. Widmer
  • Recovering non-volatile metals from dust containing metal oxides
    Patent number: 4310350
    Abstract: A method of recovering non-volatile metals from materials in dust form containing metal oxides, comprising the steps of blowing the material into the lower portion of a reactor, said reactor containing a solid reducing agent, passing said starting material into a reduction zone within said lower portion, said reduction zone being maintained by the use of a plasma generator adjacent thereto, substantially instantaneously reducing and melting said starting material in sad reduction zone, and removing the melted and reduced metal product from the bottom of the reactor.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: January 12, 1982
    Assignee: SKF Steel Engineering Aktiebolag
    Inventor: Sven Santen
  • Apparatus for carrying out metallurgical reactions in a ladle
    Patent number: 4309025
    Abstract: A ladle covered by a lid suitable for carrying out metallurgical reactions, particularly desulphurization, characterized by the fact that the lid is spaced above the ladle so that the edge of the lid overlaps the edge of the ladle, thereby forming an annular slot. A collar open at the top and bottom is inserted in the ladle and is attached to the lid to form outlets for ambient air.
    Type: Grant
    Filed: October 3, 1980
    Date of Patent: January 5, 1982
    Assignee: Thyssen Aktiengesellschaft
    Inventor: Walter Meichsner
  • Low density compacts of prepared mix for use in the production of silicon and ferrosilicon
    Patent number: 4309216
    Abstract: A low density, porous compact of prepared mix containing silica fume, finely-divided carbonaceous reducing agent such as petroleum coke or coal, optionally iron and a binder.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: January 5, 1982
    Assignee: Union Carbide Corporation
    Inventor: Rodney F. Merkert
  • Steel making by converter
    Patent number: 4308057
    Abstract: Steel making by a converter comprises blowing oxygen onto the surface of molten steel held in the converter and blowing agitating gases of 1/3 to 1/3000 of the amount of said oxygen thereinto from tuyeres provided at bottom of the converter, which number from 1 to 30 and are from 2 to 30 mm.phi. in inside diameter, thereby to effectively agitate the molten steel and make blowing reaction stabilized for purposes of increasing production and improving quality of the steel.
    Type: Grant
    Filed: August 4, 1980
    Date of Patent: December 29, 1981
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shigeyuki Ono, Akichika Ozeki, Eiichi Sakamoto, Kiyomi Taguchi, Yoshio Miyashita
  • Method and apparatus for introducing solid substances into liquid metals
    Patent number: 4308056
    Abstract: Solid substances are introduced into a bath of molten metal by pushing a hollow metal tube filled with the solid substance, through a tubular former that imparts a spiral shape to the carrier tube. The spiral rotates about a vertical axis as it descends into the bath of molten metal.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: December 29, 1981
    Assignee: Italsider S.p.A.
    Inventors: Giovanni Guarino, Alberto Praitoni, Vittorio Saverese
  • Process for the oxidation of molten low-iron metal matte to produce raw metal
    Patent number: 4308058
    Abstract: A molten metal matte low in iron is oxidized by blasting oxygen or air into the metal layer to produce raw metal.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: December 29, 1981
    Assignee: Outokumpu Oy
    Inventors: Simo A. I. Makipirtti, Launo L. Lilja, Mauri J. Peuralinna, Valto J. Makitalo
  • Method for producing steel from solid, iron containing pieces
    Patent number: 4304598
    Abstract: A procedure is provided for producing steel from solid, iron containing pieces such as scrap iron, solid pig iron, iron pellets, iron sponge and the like. The iron containing pieces are smelted in a blown oxygen converter equipped with submerged injection devices for oxygen and pulverized fuel. The pieces are first introduced into the converter and preheated and then they are contacted with a sufficient quantity of molten steel to substantially reduce the length of the smelting period and thereby conserve fuel. The molten steel used in the contacting step is recycled from the previous batch after having been retained for the meanwhile in a separate auxiliary ladle.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: December 8, 1981
    Assignee: Klockner-Werke AG
    Inventors: Ludwig von Bogdandy, Karl Brotzmann
  • Hardening of metals
    Patent number: 4304594
    Abstract: Hardened metals are produced by subjecting molten metals to the action of an electrostatic field of at least 1000 volts during the cooling and solidification of the metal.
    Type: Grant
    Filed: April 9, 1980
    Date of Patent: December 8, 1981
    Inventor: Ellsworth G. Munck
  • Apparatus for the production of steel and iron alloys
    Patent number: 4303230
    Abstract: This invention relates to a water-cooled lance suitable for top-blowing molten metal with oxygen entraining hydrogen extraneously to the lance characterized in that the oxygen nozzle (1) thereof includes an annular passage (8) which converges and then diverges inwardly towards the longitudinal axis of the lance and the hydrogen nozzle (9) is an inner nozzle which includes a right circular cylindrical axial passage through a member (7) centrally located in the oxygen nozzle.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: December 1, 1981
    Inventor: William Bleloch
  • Steel conversion method
    Patent number: 4302244
    Abstract: 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 or bath contained in a vessel by means of bottom tuyeres and simultaneously delivering a second quantity of oxygen to the bath from above through a top lance. The oxygen delivered through the bottom tuyeres is sufficient to promote mixing and is about 10% to 40% of the oxygen required for oxidation of impurities with the balance delivered through the top lance. An additional quantity of oxygen is delivered through the top lance to the space above the bath for post-combustion of off-gases to increase the thermal energy in the bath. Fluxes such as lime are added from above in lump form in the conventional manner or are entrained in the upper oxygen stream as required.
    Type: Grant
    Filed: July 18, 1980
    Date of Patent: November 24, 1981
    Assignee: Pennsylvania Engineering Corporation
    Inventors: Walter Sieckman, Jai K. Pearce, Eberhard G. Schempp
  • Continuous copper melting furnace
    Patent number: 4301997
    Abstract: An improved vertical furnace for melting metal pieces, such as pieces of copper cathode. The furnace has a generally round interior wall of refractory brick material which encloses a vertical melting chamber having a plurality of burner openings through the refractory wall. Heat, being injected through these openings by means of a novel burner design, melts the metal pieces under metallurgically controlled conditions. The burners are arranged near the bottom floor of the melting chamber which is sloped toward a single outlet thus allowing the molten metal to continuously drain from the melting chamber. The burners are fed a mixture of fuel and air from a plurality of remote mixing stations so as to reduce turbulence at the burners thereby significantly reducing the operating noise level and refractory wear compared to prior art furnaces.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: November 24, 1981
    Assignee: Southwire Company
    Inventors: Milton E. Berry, Ronald L. Pariani
  • Method for treating sulfide raw materials
    Patent number: 4300949
    Abstract: The present invention relates to the field of non-ferrous metallurgy and more specifically to methods for treating sulfide raw materials.The method comprises an autogenous smelting of the raw materials with flux additions in a blast furnace, where a quartz layer 0.3 to 1.5 m high is provided immediately above the tuyeres of the furnace. The smelting process is conducted with oxygen-enriched air blowing with an oxygen consumption of 300 to 400 m.sup.3 /tonne of sulfide material. The smelting method produces matte suitable for subsequent converting, elemental sulfur, and off-gases containing 8 to 25% SO.sub.2.The method can be applied for copper and copper-nickel production.
    Type: Grant
    Filed: March 7, 1980
    Date of Patent: November 17, 1981
    Inventors: Konstantin I. Ushakov, Mikhail E. Khilko, Rina I. Felman, Vasily I. Sadykov, Evgeny I. Kalnin, Pavel A. Kovgan