Corex process

Corelle Coreminal Cores Corethane COREX process... 

Corex process. The Corex or Cipcor process has integral coal desulfurizing, is amenable to a variety of coal types, and generates electrical power in excess of that required by an iron and steel mill which can be sold to local power grids. A Corex plant is in operation in South Africa, and other plants are expected to be operational in South Korea and India. 

Some cokeless technologies in use or under development include the Japanese direct iron ore smelting (DIOS) process, in which molten iron is produced directly with coal and sinter feed ore, the HIsmelt process, where ore fines and coal are used to achieve a production rate of 8 t/h using ore directly in the smelter, and the Corex process, which has an integral coal desulfurizing step, making it amenable to a variety of coal types.14... 

Core technologies, 21 625-626, 629 Core tissues, in flax fiber, 11 597-598 Corex process, 14 520-521 Corey-Pauling-Kolton (CPK) surfaces, 16 732... 

Long-term development work is focusing on direct smelting technologies. Multimillion dollar development programs are underway in the United States (AISI Direct Ironmaking process), Australia (HIsmelt process), and Japan (DIOS process). A direct smelting process, called the COREX process, already is in commercial operation in South Africa. 

South Blackwater and Ensham coal are shipped from Gladstone port in QLD, Australia to the Jindal COREX plant in India. The COREX process is a unique and modem process of iron making that has many distinct advantages over the conventional blast furnace iron making process. The COREX process does not required coking coal and uses only thermal coal for generating heat, reduction gas and adequate permeability. The properties of South Blackwater and Ensham coal used in the Jindal COREX plant are given in Table 1. 

The Mean particle size (MPS) of coal is an important factor for the COREX Process because a decrease in the MPS reduces the permeability of the char bed resulting in gas channelling, which drops the hot metal temperature and quality. To maintain consistency, the MPS of the coal should be maintained within 20-30 mm, which is a very important factor for efficient plant operation. The COREX technology coal should be sized at +16 mm with a top size as high as 70-80 mm. Fines coal (—16.0 mm) included with the sized coal is separated at the COREX steel mill and used for either... 

COREX Process (26). The COREX process began as an advanced process for iron making, not for coal gasification. It uses an oxygen-blown combination coal gasifier/iron melter. Coarse-size coal and hot pre-reduced iron are fed to this gasifier/melter. This process favors coals that have a minimum of fines and are low in sulfur and volatiles. 

Kloeckner/CRA Process (29). The Kloeckner/CRA molten-iron bath coal gasification process was originally very similar to the KHD process. However, developers have modified it for use in a new iron making process called HIselt being developed by CRA and Midrex. A large pilot plant is under construction in western Australia. It is likely that this process could produce excess coal-derived fuel gas like the COREX process. 

U.S. Development (30). A consortium of U.S. integrated steel companies is currently developing an advanced steel-making process based on coal, oxygen, and iron ore. A large (120 t/d) pilot plant is under construction at a USX facility near Pittsburgh, Pennsylvania. Though process details are not public, the process is likely to be similar to the COREX process and produce excess coal-derived fuel gas. 

The COREX Process." Brochure. Diisseldorf, Germany Deutsche Boest-Alpine Industrieanlagenbau GmbH. 

EFFECT OF REDUCTION CONDITIONS ON PRE-REDUCTION BEHAVIORS OF SELF-FLUXED PELLETS IN COREX PROCESS... 

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