Ishikawajima-harima Jukogyo Kabushiki Kaisha

Ishikawajima-harima Heavy Industries Co., Ltd.

Ihi Corporation

Nippon Kokan Kabushiki Kaisha

Bhp Steel (jla) Pty. Ltd.

Tohoku University

Ihi Inspection and Instrumentation Co., Ltd.

Fuji Toyuki Kabushiki Kaisha

Industries Co., Ltd.

Kunio Matsui

Hisahiko Fukase

Atsushi Hirata

Akihiro Nomura

Hiroaki Tsuchiya

Ryushi Suzuki

Hideaki Komaki

Soichiro Kato

Yutaka Tsuchida

Shu Ogawa

Akira Sase

Tomio Yamamoto

Kenji Matsuda

Joji Yamaga

Hisashi Nakamura

Kaoru Maruta

Ryo Akiyoshi

Yukio Hosaka

Akihiko Kimatsuka

Koichi Fujita

Masayoshi Hori

Takayoshi Omura

Tsuyoshi Saura

The fuel physical property determination method relating to the first aspect of the present invention includes: a test fuel flame-imaging step of obtaining imaging data by imaging flames formed by supplying a pre-mixed gas containing a test fuel and an oxidant agent, to a test tube in which an internal flow path thereof has a diameter set smaller than a flame-quenching distance at normal temperature; and a physical property determination step of determining a physical property of the test fuel by comparing the imaging data obtained in the test fuel flame-imaging step and imaging data obtained by imaging flames ignited by supplying a pre-mixed gas containing a standard-mixed fuel and an oxidant agent, to the test tube, the standard-mixed fuel having a known physical property.

Fuel physical property determination method and fuel physical property determination device

A gas mixture containing a fuel, water and air is supplied to one end of a reforming room, and a reformed gas containing hydrogen is discharged from the other end thereof. Two or more such reforming units are connected in series, and the upstream part of each reforming room is filled with a first catalyst which catalyzes a partial oxidation reaction in an oxygen-rich environment, and the downstream part is filled with a second catalyst which performs the reforming reaction. The gas mixture which has been heated in a heating unit passes through a distribution tube and is distributed evenly to the reforming units. The reforming room is composed of a reforming tube in which a reforming catalyst is charged, or two or more such reforming tubes, parallel to each other. After being reformed the high-temperature reformed gas is passed around the reforming tubes, and fed back to a manifold.

Method and apparatus for reforming fuel

A gas mixture containing a fuel, water and air is supplied to one end of a reforming room, and a reformed gas containing hydrogen is discharged from the other end thereof. Two or more such reforming units are connected in series, and the upstream part of each reforming room is filled with a first catalyst which catalyzes a partial oxidation reaction in an oxygen-rich environment, and the downstream part is filled with a second catalyst which performs the reforming reaction. The gas mixture which has been heated in a heating unit passes through a distribution tube and is distributed evenly to the reforming units. The reforming room is composed of a reforming tube in which a reforming catalyst is charged, or two or more such reforming tubes, parallel to each other. After being reformed the high-temperature reformed gas is passed wound the reforming tubes, and fed back to a manifold.

A casting roll (18) for a twin roll continuous caster comprises a roll body (19) made of a metal material having high rigidity and a sleeve (20) made of a metal material having high thermal conductivity for covering an outer periphery of the roll body (19). A plurality of load bearing members (23) with thicker width are provided peripherally on the outer periphery of the roll body (19), the load bearing members (23) being in contact with an inner periphery of the sleeve (20) and extending axially of the roll. A plurality of fins (24) with thinner width and shorter in height than the load bearing members (23) are provided on the inner periphery of the sleeve (20) between the adjacent load bearing members (23) and extending axially of the roll, cooling water passages (25) being provided in the form of gaps defined between the roll body (19) and the sleeve (20) thereby providing a roll having sufficiently high rigidity to prevent or at least minimise damage of the cooling water passages when the solidified shells are brought together between the rolls and/or having an enhanced heat transfer area.

Roll cooling structure for twin roll continuous caster

To give vibration to molten metal in a melt pool to enhance solidification efficiency of the molten metal. Substantially directly above meniscus 14 between molten metal 5 in a melt pool 4 and each of rolls, an AC electromagnet 15 is arranged over the entire length of said meniscus 14 so that magnetic flux runs substantially perpendicular to a surface of the molten metal. Above the AC electromagnet 15, a DC electromagnet 16 is arranged over the entire length of the AC electromagnet 15 so that magnetic flux runs substantially perpendicular to the surface of the molten metal. Under application of DC magnetic field by means of the DC electromagnet 16, an AC magnetic field is applied near the meniscus 14 between the molten metal 5 in the melt pool 4 and each of the rolls 1 and 2. As a result, induction current is generated in the molten metal 5 and high frequency vibration is applied to the molten metal 5 by Lorentz's force due to interaction between the induction current and the DC magnetic field.

Method and apparatus for giving vibration to molten metal in twin roll

A twin-roll type continuous casting machine for fabricating a metal sheet from molten metal supplied from a ladle comprises a pair of spaced rolls, side weirs disposed on each roll in the lateral direction of the roll, a tundish for reserving the molten metal and supplying the molten metal through a feeder, which is provided above the rolls and below the tundish, to form a melt pool on the upper side of the gap between the rolls so as to fabricate the metal sheet through the gap between the rolls, a pressurizing chamber formed between the rolls and the tundish for gas-pressurizing the melt surface of the melt pool. The arrangement allows the ladle to easily supply the molten metal to the tundish and ensures easy maintenance of the tundish.

Twin-roll type continuous casting machine

The flow rate of melt flowing through each end face of a core toward the inner surface of a side dam in opposed relationship with each end face is variable by a side-dam-wise flow passage defined within the core, whereby various problems caused at the so-called triple-point zones can be substantially solved.

Pouring device for dual-roll type continuous casting machine

Melt flows down through downspouts into a basin defined by a pair of cooling rolls and side dams. Melt is decreased in flow rate to be supplied uniformly through a slit nozzle in a widthwise direction of the cooling rolls so that a solidified shell formed over the cooling rolls can be prevented from being melted again.

Pouring device for dual-roll type continuous casting machines

Flow rates of melt supplied to triple-point regions are controlled in response to detected shapes of lateral side surfaces of a casting and a level of the melt in a basin is maintained constant, whereby high-quality castings are produced.

Dual-roll type continuous casting machine

Cut-out portions or horizontal passages in the form of an inverted T are provided to melt solidified shells grown at triple points at which side seal plates, colling rolls and molten metal are made contact with each other. Pouring holes or slits are provided for inside pouring. Length of the slit in the cast widthwise direction is preliminarily determined so as to maintain temperature distribution in molten bath uniformly. Start of a continuous casting operation is facilitated by movable baffer plates disposed at open ends of the horizontal passage.

Dual roll type continuous casting machine

In moving-mold type or dual-belt type continuous casting machines, the molten metal static pressure in the mold cavity is detected and the quantity of the molten metal poured through the tundish nozzle into the mold cavity is controlled such that the static pressure in the mold cavity is maintained at a predetermined range in which penetration of the molten metal into the gap between the tundish nozzle and the mold assembly can be avoided.

Method for controlling internal pressure in mold cavity in moving-mold

In a dual roll type continuous casting machine, molten-metal-pouring passages for feeding molten metal into a molten bath or pool are so disposed and oriented that molten metal is fed toward the side seal plates in the directions tangential to a pair of cooling rolls, whereby only solidified shells formed on the side seal plates at the so-called triple points are effectively melted.

Disclosed is a method for causing bubbles in a fluid to coalesce into a coherent mass by use of a vessel having a cylindrical space therein wherein the fluid is caused to flow into the vessel at such a velocity that a vortex is generated to flow from one end of the space to the other while establishing a state in which the pressure on the center axis of the cylinder rises from one end toward the other, then reaches a maximal value and thereafter drops, and this coalescing of the bubbles is effected at the field near the axis of the vortex and between a position close to the inflow position and the position of the highest pressure. The method greatly facilitates deaeration.

Method for causing bubbles in a fluid to coalesce

A centrifugal separator for separating gas bubbles from a liquid incorporates a spiral liquid passage with inlet and outlet ends as defined by a top plate, a bottom plate and a strip spirally coiled between the plates and otherwise constructed so that by utilizing the low specific gravity of the bubbles and centrifugal force acting thereon, the bubbles are directed into a bubble trapping compartment for removal.

Gas-liquid separator

A gas-liquid separator wherein a helical passageway is defined between an outer cylinder and an inner cylinder in such a way that a working fluid with entrained bubbles may be forced to flow tangentially into the helical passage and swirl therethrough. The entrained bubbles are separated from the liquid through centrifugal force produced by the swirling or vortical flow through the helical passageway and trapped or collected inside the inner cylinder, from which they are discharged to the exterior.

Growing community of inventors

Yokohama, Japan

Kunio Matsui