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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Tapping slag at the HIsarna pilot plant. Slag is formed by fluxing the gangue in the iron ore and ash in the coal with lime and dolomite.
Unlike blast furnaces, the HIsmelt process can be started, stopped or idled with ease. Further there is big reduction in dust emissions and specific wate consuption. Liquid slag and metal splash acts as a carrier of the heat.
HIsmelt | Industrial Efficiency Technology & Measures
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. These process capabilities allow for raw material feed rates to be changed very efficiently without affecting product quality. Construction of the plant was started in January The fifth campaign started in the autumn of However they need support of some dedicated entreprenuers to prove to the world that they are better technologies.
Both layers can be tapped individually and the pig iron can be used immediately in the remainder of the basic oxygen steelmaking process. Reaction gas CO and coal devolatilization products which are generated from deep within the bath form a fountain of mostly slag and some metal.
HIsmelt process of Ironmaking |
Procesz steep drop in prices of commodities around caused the project to be halted. In a technical sense, the advantage of the HIsarna process is that it removes the step of creating iron ore agglomerates and coke to procesx a porous burden for the blast furnace. Low hydrogen Short circuit. Cast house and metal tapping at the HIsarna pilot plant. In November it was announced that a large scale HIsarna pilot facility would be built at the Tata Steel site in JamshedpurIndiapprocess  but that the site in IJmuiden would still be a potential location for further industrial implementation of the technology.
The plant is presently in the closed down condition. A theoretical answer was found to the earlier problems of the post-cyclone part procesw the cyclone furnace in the hismdlt of a Smelting Reduction Vessel and the Rio Tinto Group had industrial-scale experience with the required process, called HIsmelt. The projected improvements from the process are as follows. Cold commissioning commenced in the second half of while the hot commissioning was carried out in second quarter 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.
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.
Hence this process has flexibility to use high phosphorus containing ores. Control room of the HIsarna pilot plant. The basic mechanism of the process is the reduction and smelting of the iron bearing ores with the dissolved carbon in the bath.
HIsmelt process of Ironmaking
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Designed by Elegant Themes Powered by WordPress. Posted by Satyendra on Jul 2, in Technical 2 comments. This reduction reaction produces iron Fe and carbon monoxide CO.
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. Construction of the HRDF with a design capacity oftons per annum, commenced in In however, the European Union brought pressure on the steel industry to reduce its carbon footprint; the Hismdlt consortium was founded as a result and in the period the cyclone technology was selected as one of four high-potential technologies.
The heat transfer between the upper oxidizing regions to the lower reducing region is achieved in such a way that the oxygen potential gradient is maintained. It is cleaned, cooled and used as a fuel and for power generation. This operating flexibility maximizes productivity, as it is easy to maintain a steady state operating window.
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 procees and China started mass-producing cokes, the project lost momentum again. The heat of the cyclone causes the initial partial reduction reaction to take place that reduces iron ore to iron.
Without these steps, the HIsarna process is more energy-efficient and has a lower carbon footprint than traditional ironmaking processes. Design and engineering for the vertical SRV Fig 1 was completed in HRDF vertical smelt reduction vessel was commissioned in the first half of and operated through to May Hizmelt the direct environmental benefits HIsarna offers economic benefits as well.
Retrieved 25 September By the early s the availability of cokes was becoming limited due to many of the major coking facilities in the West that produced cokes from coal were reaching the end of their economic life.
The pilot plant has a capacity of producing 65, tons of pig iron per year. HIsarna – Highly energy efficient ironmaking. Between the cyclone and the slag layer, oxygen is injected through water cooled lances to procews heat by partly combusting the gasses being released from the final reduction reaction step that takes place in the slag.
Leave a Reply Cancel reply Your email address will not be published. The refractory hearth contains the molten iron bath and liquid slag. The process is carried out in this vessel.