Reduction in specific energy requirements through optimization of charge in Hismelt(Ironmaking) Process Presented by Mainak Saha. ABSTRACT. Direct smelting of iron ore is an alternative process for pig iron production that is currently coming of age. The. HIsmelt Direct. The China HIsmelt plant was commissioned and operated in , after about But sintering and coking is a high pollution emission process.
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The partnership seeks to finalize the development of HIsmelt technology and to work together to further improve the technology to higher levels of environmental and economic performance.
Control room of the HIsarna pilot plant. HIsarna – Highly energy efficient ironmaking.
The basic mechanism of hisnelt process is the reduction and smelting of the iron bearing ores with the dissolved carbon in the bath. The process does not require the manufacturing of iron ore agglomerates such as pellets and sinter, nor the production of cokewhich are necessary for the blast furnace process. The main advantages of the process are derived from those mentioned above, however: Retrieved 25 September Electro-slag remelting Vacuum arc remelting Argon oxygen decarburization.
The main improvements incorporated into the design included a stationary vertical vessel, top injection of solids, a simplified hot air blast lance, a fore hearth for continuous tapping of metal and water cooled panels to overcome refractory wear problems.
Low hydrogen Short circuit. Posted by Satyendra on Jul 2, in Technical 2 comments. Retrieved 17 March HIsmelt is short for high intensity smelting. Your email address will not be published. Cast house and metal tapping at the HIsarna pilot plant.
HIsarna ironmaking process
The pilot plant has a capacity of producing 65, tons of pig iron per year. Powder coal is injected into the slag layer, again through water cooled lances. It is cleaned, cooled and used as a fuel and for power generation. Unlike blast furnaces, the HIsmelt process can be started, stopped or idled with ease.
HIsmelt process of Ironmaking |
The highly responsive nature of the process means that it converts iron ore, coal and flux to metal, slag and energy almost instantaneously. Slag is formed by fluxing the gangue in the iron ore and ash in the coal with lime and dolomite.
Heavy environmental restrictions made it unattractive to build new facilities, so steel producers sought ways to reduce the need for cokes; Hoogovens started putting more effort into the cyclone technology as a solution to this problem and a test facility for the cyclone part proved capable of producing twenty tons of pig iron per hour.
The byproduct of the process is slag and the off gas. A theoretical answer was found to the earlier problems of the post-cyclone part of the cyclone furnace in the form of a Smelting Reduction Vessel and the Rio Tinto Group had industrial-scale experience with the required process, called HIsmelt.
But some iron making peocess like finex, HIsmelt and HIsarna are technologically sound and have potential to have better techno-economics. This page was last edited on 1 Decemberat Tapping slag at the HIsarna pilot plant. The heat transfer between the upper oxidizing regions to the lower reducing region profess achieved in such a way hisemlt the oxygen potential gradient is maintained.
Procdss combustion occurs in the relatively oxidizing region in the upper section of the SRV. Annealing Low hydrogen Short circuit.
The heat of the cyclone procesw the initial partial reduction reaction to take place that reduces iron ore to iron. Hence this process has flexibility to use high phosphorus containing ores. The SSPP operated from to and proved the viability of the technology. The use of HIsarna hot metal in steelmaking. Stahl – Stahl in Bewegung. The process has been developed to treat iron ore fines with minimum pretreatment, making the process more flexible in terms of the quality of iron ore it can treat.
HIsmelt process of Ironmaking
The fifth campaign started hismeltt the autumn his,elt Located in Kwinana, Western Australia, the merchant pig iron facility was designed and engineered with a 6 meter hearth diameter SRV. The rest of the process didn’t work very well though, so when steel producers massively moved to replace part of the coke by powdered coal injection and China started mass-producing cokes, the project lost momentum again.
Since the slag is batch tapped through a slag notch, the hot metal is slag free.