Kawasaki Steel Corporation

Other

Jfe Steel Corporation

Sumitomo Heavy Industries, Ltd.

Sumitomo Metal Industries, Inc.

Nkk Corporation

Kansai Netukagaku Kabushiki Kaisha

Tetsuro Uchida

Nozomu Tamura

Tatsuya Ozawa

Nobuya Kamide

Yoshiharu Sato

Keiji Matsuda

Terutsune Nishio

Hiroyuki Shiraishi

Hidetaka Suginobe

Makoto Numazawa

Katsuhiko Sato

Tamotsu Takahashi

Tsutomu Matsuno

Shunji Horinouchi

Hideaki Morimoto

Hideki Ohhira

Shigeru Yamada

Toshio Kondo

Hidekuni Ito

Yuzuru Osaki

Ryuzo Moritani

Keizi Kamegawa

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

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

Method and apparatus for repairing a coke oven

Growing community of inventors

Chiba, Japan

Tetsuro Uchida