Kawasaki Steel Corporation

Other

Hitachi, Ltd.

Jfe Steel Corporation

Mitsubishi Jukogyo Kabushiki Kaisha

Mitsubishi Jukogyo Kabushiki Kaisha Hiroshima Machinery Works

Kawasaki Steel Corporation Chiba Works

Kawasaki Steel Corporation Et Al.

Nozomu Tamura

Kanji Hayashi

Hideyuki Nikaido

Toshiaki Amagasa

Yoshiki Mito

Shigeru Isoyama

Takeshi Hirabayashi

Hirosuke Yamada

Kunio Miyamoto

Akio Kuroda

Toshisada Takechi

Kazuo Morimoto

Kazuya Tsurusaki

Ikuo Wakamoto

Hiroyuki Nakano

Norio Takashima

Takahiro Yamasaki

Junzo Nitta

Hideo Sakamoto

Michio Hashimoto

Toshinobu Eguchi

Fumihiro Maeda

Masashi Osada

Shuji Amanuma

Tatsuya Ozawa

Tetsuro Uchida

Kazunori Nagai

Katsuhiro Takebayashi

Saburo Moriwaki

Kiyoshi Izumi

Nobuya Kamide

Tomoaki Kimura

Tetsuya Fujii

Yoshiharu Sato

Nagayasu Bessho

Kiyoshi Shibuya

Toru Sato

Tsutomu Nozaki

Sumio Yamada

Toshitane Matsukawa

Hirokazu Tozawa

Masaru Washio

Noboru Yasukawa

Shun Suhara

Katsuhiko Sato

Kenji Nakagawa

Hidetaka Suginobe

Michio Suzuki

Toshio Kanatani

Yuzuru Osaki

Kazuyuki Katoh

Masaaki Kuga

A coke oven buckstay moving device and method which can be used to quickly, reliably, and smoothly repair buckstays compared to conventional methods and devices. The coke oven buckstay moving means includes a main car, a subcar, a frame, and securing means. The main car is used when repairing pillered buckstays that support oven walls of the coke oven, and moves on a coke side platform or a machine side platform. The subcar is placed on the main car, and can freely move forward and backward in a direction of a lengthwise direction of the coke oven. The frame is provided in a standing manner on the subcar. The securing members are mounted to the frame and are used to grasp and secure the buckstays. According to the method, a damaged portion of the buckstay is secured to the subcar, cut, and then removed. Reversing the steps, a replacement buckstay is secured to the subcar, moved into position, and welded into place. The subcar is detached, and the oven repaired.

Method of repairing a coke oven buckstay and a moving device for use in such method

Repairing a chamber coke oven by heat-insulating a repair space in the oven, dividing a brick wall in a portion to be repaired into a plurality of layers stacked one above another, dismantling and removing the brick wall in the repaired portion, and carrying refractory assemblies into the oven one by one, each of the refractory assemblies being manufactured outside the oven by combining a plurality of bricks together correspond in shape to each of the stacked layers in one-to-one relation, thereby building the brick wall in the repaired portion with the refractory assemblies. A damaged combustion chamber brick wall of the coke oven near an oven opening can be repaired with high efficiency.

Method of repairing coke oven

A continuous hot rolling mill with a metal block conveying apparatus and a metal block joining apparatus which moves with the metal blocks along the metal block conveying apparatus to conform a joining operation. The metal block conveying apparatus uses rollers supported by cylinders with a common hydraulic circuit which allows the cylinders to follow guide rails on the metal block joining apparatus and lower out of the path of the metal block joining apparatus and then return to a metal block support position after the metal block joining apparatus' passage without individual control circuits and valves for each of the cylinders.

Continuous hot rolling mill with metal block conveying apparatus

The invention comprises a continuous hot rolling method in which a rear end portion of a preceding metal block and a fore end portion of a succeeding metal block are cut and the metal blocks are joined to each other by heating and pressing followed by a finish rolling. A region of each metal block is restrained from a clamping position to the end portion thereof in order to prevent a change in level of the metal blocks in heating and pressing the piece. The end portions of the metal blocks can be thus prevented from deformation.

Defectively joined portion removal apparatus for use in a continuous hot rolling process

According to the invention, the rear end of a preceding metal piece and a front end of a succeeding metal piece are heated, pressed and joined prior to the finishing hot rolling. An alternating magnetic field running through the metal pieces in the thickness direction thereof is generated in an end region on opposed faces of the respective metal pieces to perform heating. Another alternating magnetic field whose direction is reverse with respect to that of the former alternating magnetic field is partially generated in the end region on the opposed faces of the metal pieces and in either a region where the metal pieces exist or a region outside width ends of the metal pieces. This assures a uniform heating of the end region on the opposed faces of the metal pieces over their full width to reliably join the both metal pieces to each other.

Method and apparatus for joining metal pieces using induction heating

A method and apparatus for joining metal pieces wherein the rear end of a preceding metal piece and a front end of a metal piece are heated and then pressed together prior to hot finished rolling. The temperature the ends of the metal pieces are heated to is a temperature range between the solidus and liquidus line temperatures of the metal(s) to be joined.

Method of joining metal pieces

Method and apparatus for joining metal pieces

Method and apparatus for joining metal pieces using induction heating. Metal pieces to be joined are placed end-to-end with a gap between them and induction heated in the thickness portion. To maximize speed and even heating edge-to-edge of the ends, members of a magnetic substance are provided in a gap between the inductor and the piece to be heated, thereby enhancing local heating effect by increasing magnetic flux density. Once heated, the ends are pressed together end-to-end for joining.

An apparatus for joining metal pieces using induction heating. Preceding and succeeding metal pieces are followed by a carriage which carries an inductor. The inductor has the ability to move in the longitudinal direction of the metal pieces relative to the carriage to allow the inductor to move more or less upon the preceding or succeeding metal pieces to increase or decrease the induction heating effect, thereby taking into account any thickness variation of the metal pieces and yet still heating them evenly with regard to each other, prior to their being pressed against each other for joining before hot finishing rolling.

Apparatus for joining metal pieces using induction heating

The invention comprises a continuous hot rolling method in which a rear end portion of a preceding metal block and a fore end portion of a succeeding metal block are cut and the metal blocks are joined to each other by heng and pressing followed by a finish rolling. A region of each metal block is restrained from a clamping position to the end portion thereof in order to prevent a change in level of the metal blocks in heating and pressing the piece. The end portions of the metal blocks can be thus prevented from deformation.

Continuous hot rolling method of metal blocks, as well as a metal block

The pressure in the coking chamber of a coke oven is held at about atmospheric pressure, and the temperatures at the opposite longitudinal ends of the combustion chamber are independently controlled. Fuel gas is supplied to hold the temperature at the opposite longitudinal ends to be at least about 1000.degree. C. separately from a main burner for the combustion chamber, and the pressure in the coking chamber during the first part of coking is kept in a range from 5 mmH.sub.2 O below atmospheric to 10 mmH.sub.2 O above atmospheric pressure. This allows efficient coke production even with low moisture content coking coal, and coal crumbling near the oven doors is not a problem. The process is typically carried out in a coke oven having a pressure control system for each coking chamber including plural piping devices for supplying a pressure fluid and switching valves for selectively applying the pressure fluid to the nozzle in the rising pipe through any selected one of the piping systems. The fluid pressure applied to the nozzle and the pressure in the coking chamber are preferably changed over time based calculated relationships between carbonization time, coking chamber pressure, and fluid pressure applied to the nozzle.

Method of controlling the operating temperature and pressure of a coke

Hot rolling method for continuously joining metal blocks and an

Ladles used for vacuum refining processes, for example a VOD process, are provided with covers to cover openings of ladles. The covers generally consist of refractories, which are required to have excellent resistance to thermal spalling due to heat cycles and not inhibit decarbonization during refining processes of molten steel. The ladle cover comprises a refractory having a carbon content 5 wt % or more. Preferably, a refractory has a carbon content 5 wt % or more is used for a central section of the ladle cover, and a refractory having a carbon content less than 5 wt % is used for peripheral sections of the ladle cover.

Ladle cover for vacuum refining process

Apparatus and method of producing a thin metal ribbon by pouring a molten metal onto the surface of a quench roll rotating at a high speed so as to rapidly cool and solidify the metal to form the ribbon, separating the ribbon from the quench roll and conveying the same to a take-up device. A compressed gas is blown tangent to the quench roll to separate the ribbon from the quench roll. The separated ribbon is sucked and caught by a suction conveyor which runs at a velocity greater than the speed of production of the thin meal ribbon thereby imparting tension to the ribbon.

Method and apparatus for producing thin ribbon

Growing community of inventors

Chiba, Japan

Nozomu Tamura