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 highly responsive nature of the process means that it converts iron ore, coal and flux to metal, slag and energy almost instantaneously. At that time the desire was mostly a cost-cutting measure in order to make the process cheaper in trying economic times.
HIsmelt is short for high ptocess smelting. The molten iron droplets then drip down the furnace wall to the place where the “neck” widens into the “bottle”.
The first serious revival came inwhen Hoogovens sought a method of producing steel without having to produce iron ore agglomerates such as pellets and sinter. Typical flow sheet of hosmelt process is shown in Fig 2 and the typical layout of the process is in Fig 3. Stahl – Stahl in Bewegung.
However, at the time they couldn’t get it to work properly and the experiment was quickly abandoned. Both layers can be tapped individually and the pig iron can be used immediately in the remainder of the basic oxygen steelmaking process.
HIsarna ironmaking process
Your email address will not be published. The process allows the use of non coking coal and iron ore fines with significant impurities. Construction of the HRDF with a design capacity oftons per annum, commenced in This combustion occurs in the relatively oxidizing region in the upper section of the SRV. Views Read Edit View history.
Since the slag is batch tapped through a slag proces, the hot metal is slag free.
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 HIsarna process is a smelting reduction process with two directly coupled process stages in which the production of liquid pig iron takes place. Typical temperature of hot metal is around — deg C and typical composition of the hot metal is as follows:.
The horizontal vessel was operated from October to August 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. Hot metal is tapped continuously through an open forehearth and is free of slag.
Design and engineering for the vertical SRV Fig 1 ihsmelt completed in Bessemer process Open hearth furnace Electric arc furnace Basic oxygen process. The SSPP operated from to and proved the viability of the technology.
HIsarna ironmaking process – Wikipedia
Unlike blast furnaces, the HIsmelt process can be started, stopped or idled with ease. Once there are successful operating references available for these technologies then all the future installations will be of these technology based iron making units. Powder coal is injected into the slag layer, again through water cooled lances. Besides the direct environmental benefits HIsarna offers economic benefits as well. This is done through large amounts of liquid splash moving between the two regions.
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. These process capabilities allow for raw material feed rates to be changed very efficiently without affecting product quality. Cast house and metal tapping at the HIsarna pilot plant.
Blast furnace process is no doubt proven route globally.