Strategies for Development of Optimal Process Control Models for Hot Metal Desulfurization : Conventional and AI Techniques By B. Deo, Lingamaneni, A. Dey, Prateek Mittal INTRODUCTION of different models depends to a large extent on Optimal process control models can be the quality of data and the variability of process developed by using ...
May 28, 2015· but lime and calcium carbide have a lower equilibrium with the sulphur in the hot metal, see This means that magnesium is required for a fast process, but that lime or calcium carbide is ...
May 14, 1991· One aspect of the present invention is directed to a process for desulfurizing molten hot metal, by injecting a desulfurization reagent into the molten hot metal using a carrier gas via a lance immersed in the molten hot metal; said desulfurization reagent comprising powdered or particulate magnesium nitride.
dephosphorisation, ladle desulphurisation, and inclusion imaging Chris Pistorius Center for Iron and Steelmaking Research Carnegie Mellon University ... Hot metal dephosphorisation: optimal slag composition for twoslag practice Equilibrium experiments MgOsaturated slag, 1400°C
AbstractIron losses during hot metal desulphurisation using magnesium and calcium carbide have been studied by large scale investigations of slag from the slag pit as well as slag sampling during desulphurisation at SSAB EMEA in Luleå The desulphurisation slag after coinjection is normally solid and contains a large amount of iron An alkali ...
Desulphurization of pig iron using calcium carbide based reagents C. BRODRICK SA Calcium Carbide Use of calcium carbide based reagents is a long established practice for the desulphurization of pig iron/hot metal resulting in the removal of the sulphur from the molten metal as calcium sulphide into the slag floating on the molten metal surface.
A number of complex phenomena take place during the injection process which require an investigation of the kinetics, thermodynamics, transport processes and overall process dynamics of both the molten iron and the topslag layer to predict the dynamic removal of sulphur from hot metal.
Sep 01, 2013· The new process is particularly suitable for treating large batches. Simetal HM KR Desulf adds a stirrerbased solution to the current Siemens portfolio of desulphurisation plants that run on the injection process. Due to the use of sulphurcontaining fuels in the blastfurnace process, hot metal always contains a certain amount of sulphur.
Desulphurisation of HIsarna hot metal HIsarna is a new ironmaking process that is being developed at Tata Steel IJmuiden that reduces CO 2 emissions. HIsarna hot metal (HsHM) has a different composition compared to normal hot metal (HM) from a blast furnace (BF); notably much higher sulphur [1,2]. Fig 1. HM composition and temperature vs Mg ...
in hot metal %. Keywords: DESULFURIZATION, HOT METAL, MAGNESIUM, INJECTION Introduction Current demands of steelmaking need improvement of technological and design solutions in outoffurnace desulfurization of hot metal with maintenance of high efficiency and carrier power of desulfurization plant, the maximum efficiency at
After injection of calcium carbide and magnesium during desulphurisation of hot metal, the slag is normally solid and contains large amounts of iron. Besides the enclosed iron droplets in the slag, drawnoff hot metal during slag skimming also accounts for iron losses during desulphurisation of hot metal.
Desulfurization technology developed as a result of the need to reduce cost and increase productivity in the hot metal process. Slag management and sulfur management became key in these improvements. Use of reagents introduced into the hot metal had been through mechanical stirrers and by dunking materials filled with magnesium into the ladle.
Mar 14, 2015· c) It is the first steel Plant in India to adopt external desulphurisation of hot metal by calcium carbide injection process. d) It is the only Plant in SAIL producing Cold Rolled Non Oriented (CRNO) Steel sheets for use in the electrical industries with installed capacity of 73,000 Ton/year.
To be able to select the optimum process at any time and thus flexibly adapt the hot metal desulphurisation plant to the respective operating and production conditions, a comprehensive knowledge of the metallurgy of the hot metal desulphurisation process is required. Selection of the optimum process is performed by a metallurgical process computer.
Sep 17, 2015· Desulphurisation process • Dip lance process is the most economical, effective and reliable method of desulphurisation of hot metal. • It consists of pneumatic injection of fine grained desulphurisation reagent into the hot metal. • Nitrogen gas is normally used as a carrier gas for the desulphurization reagent.
The new hot metal desulphurisation plant desulphurise Mio. hot metal per year with the coinjection process with lime and magnesium. Die neue Ro heise nEntschwefelungsanlage e ntsch we felt jährlich 2,5 Mio.