Jfe Steel Corporation

Chugai Ro Co., Ltd.

Ikuhiro Sumi

Koichi Tsutsumi

Yoshihiro Miwa

Sumito Ozawa

Takayuki Ito

Ryota Murai

Kenichi Tomozawa

Katsuyasu Sugawara

Takahiro Kato

Takashi Kuroki

Ryo Kawabata

Yasuhiro Mogi

Yoshiki Fujii

Satoshi Kohira

Yoshinobu Kuga

Masayuki Fukami

Nobuyuki Shigaki

Takashi Haraoka

Atsushi Watanabe

Yoshiteru Kikuchi

Shinichi Akai

A method for manufacturing molten iron by melting a cold iron source in an electric arc furnace having a carbonaceous material-injecting device. The method includes, in the carbonaceous material-injecting device, while a carbonaceous material is injected with a carrier gas through a central portion of the carbonaceous material-injecting device, injecting a fuel and a combustion-supporting gas through respective outer peripheral portions of the carbonaceous material-injecting device. The carbonaceous material injected through the central portion passes through a cylindrical combustion flame generated by a combustion reaction between the fuel and the combustion-supporting gas and is injected into molten slag and molten iron.

Method for manufacturing molten iron with electric arc furnace

Provided is an auxiliary burner for an electric furnace that has high iron scrap heating effect by appropriately and efficiently burning a solid fuel such as coal together with a gas fuel. An auxiliary burner for an electric furnacehas a structure in which a solid fuel injection tube, a gas fuel injection tube, and a combustion-supporting gas injection tubeare coaxially arranged in order from the center. The front end of the solid fuel injection tubeis located inside the gas fuel injection tubeto form, between the front end of the solid fuel injection tubeand the front end of the gas fuel injection tube, a first spacefor solid fuel and gas fuel premixing surrounded by the front end portion of the gas fuel injection tube

Auxiliary burner for electric furnace

A gas separation and recovery method is provided. Based on the fact that a gas adsorbent has differing adsorption and desorption characteristics depending on the affinities and pressures of gas species, and gases of different species are desorbed at different timings, a target gas component is separated and recovered from a source gas by a pressure swing adsorption process in such a manner that a desorption step is divided into, for example, two time periods and desorbed gases are recovered separately in the respective time periods. In this manner, when gasand gashaving different desorption timings are adsorbed to an adsorbent, a gas rich in gas, and a gas rich in gasmay be recovered separately from each other. Thus, it becomes possible to separate and recover selectively a target gas component with high concentration.

Gas separation and recovery method and facility

An auxiliary burner for an electric furnace capable of increasing and homogenizing the heating effect of iron scrap by suitably and efficiently burning solid fuel along with gas fuel. Auxiliary burnerfor an electric furnace comprises a solid fuel injection tube, a gas fuel injection tube, and a combustion-supporting gas injection tubein the stated order from the center side, all arranged coaxially, and is characterized in that: a combustion-supporting gas flow pathof the 10 combustion-supporting gas injection tubeis provided with a plurality of swirl vanesfor swirling the combustion-supporting gas, and the angle &#x3b8; formed between the swirl vanesand the burner axis is 5&#xb0; or more and 45&#xb0; or less.

Provided is a cutting machine that cuts a high-temperature moving object to be cut while moving in synchronization with the movement of the object to be cut, and that is capable of effectively protecting itself from the heat of the object to be cut and effectively utilizing the heat. A cutting machine for cutting a high-temperature moving object to be cut while moving in synchronization with the movement of the object to be cut, comprising: a cutter configured to cut the object to be cut; a movement device configured to move the cutting machine in synchronization with the object to be cut; a water-cooling plate configured to cool the cutting machine; and a thermoelectric power generation device including a thermoelectric element for converting the heat of the object to be cut into electric energy, wherein the water-cooling plate also serves to cool a low-temperature side of the thermoelectric element.

Cutting machine and thermoelectric power generation method

Provided is an auxiliary burner for an electric furnace capable of increasing and homogenizing the heating effect of iron scrap by suitably and efficiently burning solid fuel along with gas fuel. This auxiliary burnerfor an electric furnace comprises a solid fuel injection tube, a gas fuel injection tube, and a combustion-supporting gas injection tubein the stated order from the center side, all arranged coaxially, and is characterized in that: a flow pathof the combustion-supporting gas injection tubeis provided with a plurality of swirl vanesfor swirling the combustion-supporting gas, and a flow pathof the gas fuel injection tubeis provided with a plurality of swirl vanesfor swirling the gas fuel; and the angle &#x3b8;of the swirl vanesand the &#x3b8;of the swirl vanessatisfy the relationship &#x3b8;&#x3c;&#x3b8;.

Growing community of inventors

Tokyo, Japan

Ikuhiro Sumi