Patents by Inventor Rafik Aizatulov

Rafik Aizatulov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5417740
    Abstract: 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 slag with basic slag forming material to increase its basicity, melting temperature, and viscosity, and to reduce its melting temperature below the melting point. The altering step is performed before charging ferrous materials for a new heat. Altered slag is then positioned on the bottom of the furnace, or on the furnace walls, or both, using a slag coating technique. Ferrous metal is then charged, after which a second charge of basic slag forming materials may be added prior to and/or during the first controllable oxygen blow. A slagging off step is conducted after less than one-half of the oxygen is introduced into the heat and when the mass of oxygen already introduced is sufficient to oxidize approximately all of the silicon introduced with hot liquid metal charged into the furnace.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: May 23, 1995
    Assignee: ZapTech Corporation
    Inventors: Grigori Galperin, Anatoli Boutchenkov, Gregory M. Gitman, Rafik Aizatulov
  • Patent number: 5401003
    Abstract: A method of applying a hot composite on top of the refractory lining of steel making and processing vessels is disclosed. The composite may be applied to the refractory wall in more than one layer, including a dense intermediate layer for adhesion, and a less dense layer on top that is designed to be consumed as a slag-forming component during steel making and refining. The composite is applied by discharging a carrier gas containing a mixture of small particles, including particles of silica, particles of at least one high-temperature oxide based material and particles of solid carbonaceous fuel, through a carrier gas discharge nozzle. Additional substances may be added to the mixture to enhance the slag-forming process. A controllable flow of oxidizing gas is charged at high and preferably supersonic speed through an essentially crescent-shaped nozzle partially surrounding the carrier gas discharge nozzle.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: March 28, 1995
    Assignee: ZapTech Corporation
    Inventors: Rafik Aizatulov, Grigori Galperine, Gregory M. Gitman, Iakov Grenader, Boris Kustov, Anatoly M. Sizov, Stanislav I. Zhigach
  • Patent number: 5378261
    Abstract: A steel making process is disclosed that utilizes solid ferrous metallic material as a substantial part of the metallic charge and uses heat released by combustion of two different types of carbonaceous materials and steel scrap that have been strategically charged inside of at least a partially refractory lined steel making vessel. One of the carbonaceous materials contains a high content of volatile hydrocarbons and is primarily responsible for early preheating and partial melting of the solid ferrous material. The second carbonaceous material contains a low content of volatile hydrocarbons and is primarily responsible for providing a reducing capability to the slag, for carburizing the melt and for providing additional heat generated by combustion which is used to enhance heating and melting of solid ferrous materials.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: January 3, 1995
    Assignee: Zaptech Corporation
    Inventors: Rafik Aizatulov, Boris Kustov, Grigori Galperin, Iakov Grenader, Gregory Gitman
  • Patent number: 5286277
    Abstract: A steelmaking process is disclosed utilizes solid ferrous metallic material as a substantial part of the metallic charge and uses heat released by combustion of two different types of carbonaceous materials and steel scrap that have been strategically charged inside of at least a partially refractory lined steelmaking vessel. One of the carbonaceous materials contains a high content of volatile hydrocarbons and is primarily responsible for early preheating and partial melting of the solid ferrous material. The second carbonaceous material contains a low content of volatile hydrocarbons and is primarily responsible for providing a reducing capability to the slag, for carburizing the melt and for providing additional heat generated by combustion which is used to enhance heating and melting of solid ferrous materials.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: February 15, 1994
    Assignee: Zaptech Corporation
    Inventors: Rafik Aizatulov, Grigori Galperine, Gregory Gitman, Jakov Grenader, Boris Kustov