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The Corex smelting reduction ironmaking technology has been known as an advanced technology of metallurgical industry presently due to the use of non-coke coal, shorter production route, lower investment and cost, less pollution and good quality of hot metal and the use of off gas for production of sponge iron.
smelting reduction Prior art date 2002-09-02 Legal status The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Ceased Application number AU2003228122A Other versions AU2003228122A1 en Inventor Min-Young Cho Young-Joo
Smelting reduction furnace 1.9kgcm2 G 290kPa N2 70Nm3 Tapping device RD 27.0 779 OC O2 608Nm3 RD 27.1 OD 31.6 Pre-reduction furnace Plant size Smelting reduction furnace Pre-reduction furnace 500 t-molten ironday Height 9.3m Inner diameter 3.7m Pressure less than 2.0kgcm2 G 300kPa Height 8.0m Inner diameter 2.7m Legend ...
COREX and COSRI smelting reduction iron-making process could directly use coal as reductant. So it is necessary to contrast the development and technology of two kinds smelting reduction iron-making process. Due to lack of funds, COSRI smelting reduction iron-making process has not been fully developed. And the COREX has completed the transformation to
JSW Steel is the first Indian Company to use the Corex technology to produce hot metal. We went for this technology although it was untested in Indian conditions due to its benefits to the environment. Corex is a smelting-reduction process developed by VAI, for cost-efficient and environmentally friendly production of hot metal from iron ore and low grade coal.
A two-dimensional mathematical model is developed to describe iron oxides reduction in the shaft furnace of COREX smelting reduction process. Combined with mass, momentum and heat transfers between gas and solid phases in steady state, the model calculates and demonstrates the basic characteristics of the shaft furnace, such as velocity, pressure,
The COREX smelting reduction process is environmen-tally friend with low energy consumption, which provides a new way for the sustainable development of the ironmaking and steelmaking industry.1 However, the severe disintegra-tion behavior of lump ores limits its proportion in the burden of COREX shaft furnace, which would increase the cost of
Corex is a smelting reduction process Coal gasification, iron ore reduction, and liquefaction of the resulting iron are combined in one process. The gases produced can immediately be used for heating or for generating electricity in a gas and steam turbine power plant.
May 11, 2010 This work deals with the topic of how a new smelting reduction process influenced the iron and steel making industry till today. It covers the history of the iron and steel production, the development of the COREX plant and the influence of environmental restrictions and future perspectives for this iron-making process.
Apr 18, 2020 The Corex Process is a smelting reduction process created by Siemens VAI as a more environmentally friendly alternative to the blast furnace. Views Read Edit View history. Corex Process for Production of Iron Cirex is coal which has been cooked in order to remove impurities so that it is superior to coal. The hot metal produced has carbon and ...
4. COREX is smelting reduction process, whereas MIDREX is gas based shaft reduction process. The gas leaving in the corex, the reduction shaft is
Several smelting reduction processes are under further development. The process variants differ in the number of reactors, operating temperature, the ore feed pellet, lump ore or fines. The variant processes that are relatively well developed are COREX, DIOS, HIsmelt, CCF, Romelt and HIsarna.
The scarcity of coking coals and the high cost entailed in minimizing the emissions from the coke-making process as well as the relative inflexibility of large production capacity of the conventional blast-furnace ironmaking are the main reasons for the development of non-coke smelting reduction processes with the economical and ecological compatibility.
COREX, which was restricted to species balance of Fe, slag, MgO, and Al2O3. The coal and coke fed to the process is known to be used for reduction and smelting. The fractions of coal and coke utilized for reduction and smelting will help to understand the process in depth. A thermodynamic model for the COREX melter gasifier was
The background and history of COREX smelting reduction was introduced. And the technological process was provided, including the main chemical reactions in COREX process. According to the operating state, COREX process characteristics and
With Corex, all metallurgical work is carried out in two separate process reactors the reduction shaft and the melter gasifier. Iron ore lump ore, pellets, or a mixture thereof is charged into the reduction shaft, where it is reduced to direct reduced iron DRI by the reduction gas in counterflow. Discharge screws convey the DRI into the
In a nutshell, COREX is a coal based SR smelting reduction process of making hot metal or pig iron by direct use of non-coking coal. The outputs can be used either by integrated mills or EAF electric arc furnace mills. The process gasifies non-coking coal in a smelting reactor, which also produces liquid iron.
It is the first and the only commercially established smelting-reduction process based on non-coking coal which is available as an alternative route to the blast furnace for the production of hot metal. Corex process was developed by the Austrian technology supplier VOEST in the late 1970s, and its feasibility was confirmed during the 1980s.
a smelting reduction vessel Smelting reduction technology, however, does not necessarily require two separate vessels. Thecoal is fed into the smelting reduction vessel where it is gasified. This delivers heat and hot gas containing carbon monoxide. The heat is used for melting the iron in the smelting reduction vessel. The hot gas is transported to the pre-reduction unit and used
Dec 02, 2009 COREX is the first and the only commercially established smelting-reduction process, as an alternative route to blast furnace, based on non-coking coal. This process, has been developed and is being marketed by VOEST
The Corex process is a two-stage smelting reduction process, in which hot metal can be produced from non-coking coal and iron ores. Iscors Corex plant has
Teknologi peleburan langsung smelting reduction yang komersial dijalankan adalah proses COREX. Proses ini awalnya dikembangkan oleh VAI di Afrika Selatan. Penggunaan batu bara nonkokas menjadi titik kuat dari teknologi COREX.
Corex is a smelting reduction process combining a melter gasifier with a reduction shaft. ...
COREX COST-EFFICIENT AND ENVIRONMENTALLY FRIENDLY IRONMAKING. Corex is an industrially and commercially proven smelting-reduction process unique to Primetals Technologies. Corex enables the cost-efficient and environmentally friendly production of hot metal from iron ore and coal. In the Corex process, all metallurgical work is carried out
Apr 21, 2020 Corex Process for Production of Iron Smelting reduction processes come in two basic varieties, two-stage or single-stage. The COREX technology is a cost efficient, environmentally friendly and industrially accomplished alternative to the blast furnace route for the production of hot metal from iron ore and coal.
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