Kobe Steel has developed coal-based direct reduction (DR) technologies, the FASTMET, FASTMELT and ITmk3 processes, which reduce carbon composite agglomerates (pellets or briquettes) on the hearth of a rotary hearth furnace (RHF). This paper outlines the features of each process, status of technical development and commercialization.
FASTMET is a direct reduction process using rotary hearth furnace (RHF). Various carbon sources such as coal, coke breeze or carbon bearing wastes can be used as reductant. Reduction process is completed in 6 - 12 minutes. FASTMET Plant at Kobe Steel, Ltd. Kakogawa Works (KDP)
Jun 28, 2001 To provide an operating method of a rotary hearth furnace for producing reduced iron in which a stuck substance stuck on the hearth surface is removed from the hearth surface to thereby prevent or reduce the wear of the knife edge of a screw of a discharge device, enabling continuous operation for a long period and capable of achieving high availability factor.
9. A rotary hearth furnace according to claim 7, wherein said discharge element of said second heating device is at least one of a burner and an oxidizing gas for combustion. 10. A rotary hearth furnace for reducing raw materials, including a metal oxide and a carbonaceous material, to manufacture a metal, said rotary hearth furnace comprising
Jan 14, 2010 TOKYO, January 14, 2010 - Kobe Steel, Ltd. announces that the worlds first commercial plant using the ITmk3 Process successfully began production of iron nuggets in the United States on January 12 at 600 pm CST. The next-generation ITmk3 Process was developed by Kobe Steel. ... The pellets are fed into a rotary hearth furnace. Reduction ...
US2074662A US42104A US4210435A US2074662A US 2074662 A US2074662 A US 2074662A US 42104 A US42104 A US 42104A US 4210435 A US4210435 A US 4210435A US 2074662 A US2074662 A US 2074662A Authority US United States Prior art keywords hearth furnace ring walls edge Prior art date 1934-10-12 Legal status (The legal status is an assumption and is not a legal conclusion.
Oct 02, 2008 Capital Ratio Nippon Steel 70%, Kobe Steel 30% Location On the grounds of the Nippon Steel Hirohata Works (Fuji-cho, Hirohata-ku, Himeji, Hyogo Prefecture) Capital Investment Approximately 20 billion yen (Investment will be primarily for a rotary hearth furnace-type reduction furnace and related equipment.
May 25, 2010 The DRI will be supplied to Nippon Steel and Kobe Steel, with a portion also going to Sanyo Special Steel Co., Ltd., a group company of Nippon Steel. (3) In the FASTMET Plant, steel mill dust is heated to a high temperature in a doughnut-shaped Rotary Hearth Furnace (RHF) and quickly undergoes reduction to make DRI, which is then formed into ...
May 30, 2002 Midrex Technologies Inc., Charlotte, N.C., has signed an agreement with steelmaker Kobe Steel and equipment maker Techint Technologies to jointly market and supply the Fastmet and Fastmelt alternative iron systems worldwide.. Under the agreement, Techint will supply the rotary hearth furnaces and melting/smelting equipment, which are integral parts of the Fastmet and
DIRECT REDuCTIOn Shaft furnace and rotary hearth furnace (rhf) As the global technology leader in direct reduced iron (DRI) - a high-purity product for use in steelmaking, ironmaking and foundry applications - Midrex offers two types of furnaces for iron production and mineral processing.
(6) From 1992-94, Midrex and Kobe Steel Ltd. (KSL) operated a 150 kilogram/hour FASTMET rotary hearth furnace (RHF) pilot plant at the Technology Center. Based on the success of these test campaigns, KSL constructed a demonstration plant at its Kakogawa Works in Japan. KSL has since built six FASTMET Plants in Japan for reclaiming useful iron
Oct 21, 2014 The PDP had a 14 meter diameter RHF (Rotary Hearth Furnace), all the required material handling off gas treatment systems. Four campaigns were run from 2002 to 2004 and their total run time was 230 days, with the longest campaign of being 81 days. Overall plant availability was 93-94% and 9,561 MT of high quality Nuggets were produced.
Assignee Kobe Steel Ltd. Inventors Hiroshi Sugitatsu, Hiroshi Tamazawa ... dust and a carbonaceous material into a briquette and subjecting the briquette to a thermal reduction treatment in a rotary hearth furnace, the method being capable of ensuring a strength of the briquette resistant to a handling in a course after the compacting through ...
KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.) (Kobe-shi, JP) Primary Class 432/138. International Classes F27B9/16. View Patent Images Download PDF 20090136887 ... A rotary hearth furnace in which a rotary hearth being arranged between an outer circumference wall and an inner circumference wall includes an annular hearth frame, ...
A rotary hearth furnace includes a unit that supplies an agglomerate onto a hearth of the rotary hearth furnace, a unit that discharges a heated substance which has been heated in the rotary hearth fu Login ... (Kobe Steel, Ltd.) (Kobe-shi, JP) International Classes C21B13/10 F27B3 ...
In a rotary hearth furnace (RHF), the heating combustion gas from a burner may adversely affect the reductive atmosphere in the furnace. To resolve this issue, the Mechanical Research Laboratory at Kobe Steel conducted a simulation study based on the computational fluid dynamics (CFD) to optimize the RHF, in the designing stage, for gas
ITmk3 High-Quality Iron Nuggets Using a Rotary Hearth Furnace Steelmaking Process with a One-step Furnace Operation Uses Less Energy The industrial sector consumes 30% of all U.S. energy consumption, of which about half (1.5 quad) is consumed by iron and steel production.
Kobe Steel has developed coal-based direct reduction (DR) technologies, the FASTMET, FASTMELT and ITmk3 processes, which reduce carbon composite agglomerates (pellets or briquettes) on the hearth of a rotary hearth furnace (RHF).
To provide an operating method of a rotary hearth furnace for producing reduced iron in which a stuck substance stuck on the hearth surface is removed from the hearth surface to thereby prevent or reduce the wear of the knife edge of a screw of a discharge device, enabling continuous operation for a long period and capable of achieving high availability factor.
The invented pellet reclamation process includes forming green pellets of a mixture of steel furnace dust, a carbonaceous material such as coal, charcoal, lignite, petroleum coke, or coke, and an organic binder. The green pellets are fed over a layer of burnt pellets on a rotary hearth furnace which successively conveys the pellets first through a drying and coking zone in which the pellets ...
Kobe Steel, the groundbreaking iron making technology uses a rotary hearth furnace to turn iron ore, pulverized coal and limestone into iron nuggets that have 97% iron content. Most of the nuggets produced will be shipped by rail to SDIs three Indiana steel mills. While building the material handling equipment to convey resources from
High Quality Iron Nuggets Using a Rotary Hearth Furnace. The Mesabi Nugget Project is a large-scale pilot project which successfully demon-strates the innovative ITmk3 ironmaking technology developed by Kobe Steel for the North American scenario. The ITmk3 pro-cess uses a rotary hearth furnace to turn iron ore fines and pulverized coal into ...
Jan 16, 2006 With its FASTMET process for direct reduction using rotary hearth furnaces, Kobe Steel succeeded in recycling iron mill dust from blast furnaces that had until now been difficult to recycle, and at the same time, in recovering volatile components such
Nov 15, 2013 The process uses a rotary hearth furnace (RHF) for the reduction reaction (Fig 1). The end product DRI can be hot briquetted (HBI), discharged as hot DRI into transfer containers, or cooled if cold DRI is needed. FASTMELT process is the FASTMET process with addition of an Electric Iron Melting Furnace (EIF) to produce liquid iron or hot metal.
Feb 17, 2013 The pellets are charged into a rotary hearth furnace (RHF), heated to 1350 deg C, reduced, melted and separated into metal and slag. The molten iron is solidified into nuggets inside the furnace, discharged after cooling and separated from the slag. The process is simple and uses conventional equipment.
Rotary hearth furnace china-sz. Rotary hearth furnace smelting reduction technology is to make the pelletizing ball which after ingredients, mixing, pelletizing and dried process be added to an annular rotatable hearth furnace and a rotary hearth furnace, rotating under the temperature of about 1350, the iron ore is carbon reduction.
The rotary hearth furnace (RHF) process is an important coalbased direct reduction method for dust recycling (Lu and Huang, 2003) and has been practiced in the steel industry (Oda et al., 2006).
KOBE STEEL LTD (Kobe-shi, Hyogo 651-8585, JP) ... In a rotary hearth furnace method, green pellets containing water are dried before they are fed to a rotary hearth furnace. The drying is necessary to prevent the pellets from bursting due to sudden evaporation during heating, i.e., to prevent bursting inside the furnace. ...
Nov 29, 2015 Midrex and Kobe Steel Rotary Hearth Furnace Technologies tric iron melting furnace to take the FASTMET Process one more step. In the FASTMELT Process, FASTIRON also can be cast into pigs or granulated for sale or later use. An investment in a blast furnace is an investment in the future. Taphole refractories, No. 4 blast furnace, China Steel ...
The plant will introduce a new conveyer and increases operation ratio to 500,000 tonnes per year in the last half of 2011. ITmk3 was developed by Kobe Steel, that can produce high quality iron nugget in short time from low quality iron ore and fuel coal. The process can reduce CO2 emission by about 20% compared with blast furnace process.
Managed a 13 million dollar Rotary Hearth Furnace Off gas system upgrade. ... Manager - Kobe Steel, Ltd. Aurora, MN. Ryan Thompson The Jamar Company Eveleth, MN. PAULIE STARKOVICH ...
May 11, 2008 Steel Dynamics Inc., based in Fort Wayne, Ind., and its partner, Kobe Steel Ltd. of Japan, expect to invest $235 million in the nugget plant. The project has been taking shape quietly near ...
more Operational for more than 30 years, Midrex Technologies is an international process engineering and technology company. It offers shaft and rotary hearth furnace-based technologies.The company specializes in the direct reduction process that converts iron ore into high-purity direct reduced iron for use in steelmaking, ironmaking and foundry applications.
Dec 22, 2010 A recent commercial installation employing Kobe Steels ITmk3 process, was installed in Northeastern Minnesota. The basic process uses a moving hearth furnace to directly reduce iron oxides to metallic iron from a mixture of iron ore, coals and additives.
Sep 20, 2004 An example is a rotary hearth furnace (RHF) linked to a smelter (e.g., AISI, HIsmelt). The objective of this research is to select promising process combinations, develop energy, materials balance and productivity models for the individual processes, conduct a limited amount of basic research on the processes and evaluate the process combinations.