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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HIsarna ironmaking process
Pattern welding Damascus steel Crucible steel Tatara hosmelt Cementation process. This vessel addressed all the key requirements for a successful direct smelting iron making technology — combining a high level of technical achievements with simple engineering concepts and plant technology. The process uses high velocity injection of coal and ore into the melt through downwardly angled water cooled injection lances.
The environmental benefits of the HIsmelt process are considerable.
But some iron making technologies like finex, HIsmelt and HIsarna are technologically sound and have potential to have better techno-economics. To overcome this hismeltt a design was developed for water cooled vertical vessel.
Hot metal is tapped continuously through an open forehearth and is free of slag. Tapping slag at the HIsarna pilot plant. To develop the HIsmelt technology further, Rio Tinto has signed a development agreement with a Chinese steelmaker. Retrieved 25 September Powder coal is injected into the slag layer, again through water cooled lances.
The core of the HIsmelt process is the smelt reduction vessel SRV which hismelh a refractory lined hearth and water cooled upper shell. Construction of the plant was started in January History of ferrous metallurgy List of steel producers. Located in Kwinana, Western Australia, the merchant pig iron facility was designed and engineered with a 6 meter hearth diameter SRV.
Low hydrogen Short circuit. The horizontal vessel was operated from October to August The vertical vessel demonstrated major improvements in terms of refractory wear, reliability, availability, productivity and simplicity in design. Typical temperature of hot metal is around — deg C and typical composition of the hot metal is as follows:.
HIsarna is considered one of the most promising developments in reducing CO 2 emissions from the steel industry. The hot metal produced in HIsarna also has advanatges for the steelmaking process, allowing for lower slag and metal phosphorus levels in the BOF converter or larger hot metal charges in an Electric arc furnace .
The new plant is expected to be commissioned in Leave a Reply Cancel reply Your email address will not be published. Besides the direct environmental benefits HIsarna offers economic benefits as well.
Iron and steel production. Both layers can be tapped individually and the pig iron can be used immediately in the remainder of the basic oxygen steelmaking process. Cast house and metal tapping at the HIsarna pilot plant. The projected improvements from the process are as follows. Blast furnace process is no doubt proven route globally. The HIsarna ironmaking process is a direct reduced iron process for iron making in which iron ore is processed almost directly into liquid iron or hot metal.
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. The use of HIsarna hot metal in steelmaking. 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.
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. The plant is presently in the closed down condition.
HIsmelt process of Ironmaking |
The HIsarna process is a smelting reduction process with two directly coupled process stages in which the production of liquid pig iron takes place. The trying times did not last however and the project was put on the back burner until the early s. Slag can be granulated or directed into pits for further processing.
The molten iron droplets then drip down the furnace wall to the place where the “neck” widens into the “bottle”. Archived from the original on 3 April Here the droplets fall from the wall into the molten slag, which sits on top of the liquid iron bath in the bottom of the furnace.
HIsmelt | Industrial Efficiency Technology & Measures
Your email address will not be published. Hiselt is formed by fluxing the gangue in the iron ore and ash in the coal with lime and dolomite.
The refractory hearth contains the molten iron bath and liquid slag. Views Read Edit View history. Schematic of the HIsarna process Tata Steel . Between the cyclone and the slag layer, oxygen is injected through water cooled lances to generate heat by partly combusting the gasses being released from the final reduction reaction step that takes place in the slag.
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Any other technology to reach the level of BF will take a lot of time. Byproducts of the process are slag and off hismrlt. Without these steps, the HIsarna process is more energy-efficient and has a lower carbon footprint than traditional ironmaking processes.
The main objective of the HRDF was to demonstrate the process and engineering scale up of the core plant and to provide operating data for commercial evaluation. Designed by Elegant Themes Powered by WordPress. The fifth campaign started in the autumn hismrlt Design and engineering for the vertical SRV Fig 1 was completed in The main product of the process is hot hismrlt.
This operating flexibility maximizes productivity, as it is easy to maintain a steady state operating window.