Patents by Inventor Yoyou Zhai

Yoyou Zhai 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).

  • Process for the production of metal melts
    Patent number: 6508853
    Abstract: To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic features: an electric arc furnace vessel (1) provided with one charging opening (11, 21) for a metal melt and/or scrap and/or direct reduced metal, in particular direct reduced iron, and/or ore and at least one electrode (16) and one slag tapping means (22), an oxygen-blowing converter vessel (3) provided with one melt tapping means (41), wherein the oxygen-blowing converter vessel (3) and the electric arc furnace vessel (1) form a unit which is connected via an overflow weir (34) and which is rigidly mounted on the foundation and, wherein the bath surface related specifically to the bath volume is smaller in the oxygen-blowing converter vessel (3) than in the electric arc furnace vessel (1) and the oxygen-blowing converter vessel (3) shares a common re
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: January 21, 2003
    Assignee: Voest-Alpine Industrieanlagenbau GmbH
    Inventors: Stefan Dimitrov, Norbert Ramaseder, Wilfried Pirklbauer, Yoyou Zhai, Johannes Steins, Ernst Fritz, Johannes Müller
  • Process for the production of metal melts
    Publication number: 20020005083
    Abstract: To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic features:
    Type: Application
    Filed: June 29, 2001
    Publication date: January 17, 2002
    Applicant: Voest-Alpine Industrieanlagenbau GmbH
    Inventors: Stefan Dimitrov, Norbert Ramaseder, Wilfried Pirklbauer, Yoyou Zhai, Johannes Steins, Ernst Fritz, Johannes Muller
  • Plant for the production of metal melts
    Patent number: 6264883
    Abstract: To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic features: an electric arc furnace vessel (1) provided with one charging opening (11, 21) for a metal melt and/or scrap and/or direct reduced metal, in particular direct reduced iron, and/or ore and at least one electrode (16) and one slag tapping means (22), an oxygen-blowing converter vessel (3) provided with one melt tapping means (41), wherein the oxygen-blowing converter vessel (3) and the electric arc furnace vessel (1) form a unit which is connected via an overflow weir (34) and which is rigidly mounted on the foundation and, wherein the bath surface related specifically to the bath volume is smaller in the oxygen-blowing converter vessel (3) than in the electric arc furnace vessel (1) and the oxygen-blowing converter vessel (3) shares a common re
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: July 24, 2001
    Assignee: Voest-Alpine Industrieanlagenbau GmbH
    Inventors: Stefan Dimitrov, Norbert Ramaseder, Wilfried Pirklbauer, Yoyou Zhai, Johannes Steins, Ernst Fritz, Johannes Müller