scholarly journals The solar thermal treatment of manganese ore pellets using closed-loop forced convection of air

2019 ◽  
Author(s):  
Lina Hockaday ◽  
Frank Dinter ◽  
Thomas Harms ◽  
Quinn Reynolds
Keyword(s):  
Thermal Treatment ◽  
Forced Convection ◽  
Closed Loop ◽  
Solar Thermal ◽  
Manganese Ore ◽  
Ore Pellets

Effect of Sintering and Porosity Development on Direct Reduction of Manganese Ore Pellets

JOM ◽  
2020 ◽  
Vol 73 (1) ◽  
pp. 334-344
Author(s):  
Xi Ling ◽  
Richard Elliott ◽  
Mansoor Barati
Keyword(s):  
Direct Reduction ◽  
Manganese Ore ◽  
Ore Pellets ◽  
Porosity Development

scholarly journals Study of desulphurization processes at heat treatmet of iron ore pellets

2018 ◽  
Vol 1 (11) ◽  
pp. 21-28
Author(s):  
B. P. Yur’ev ◽  
V. A. Dudko
Keyword(s):  
Thermal Treatment ◽  
Calcium Sulfate ◽  
Iron Ore ◽  
Sulphur Content ◽  
Gas Content ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Nonisothermal Heating ◽  
Different Content ◽  
Kinetics Of

Main reactions of iron ore pellets desulphurization are considered in details in a number of papers, in which the results obtained refer only to their isothermal heating. Therefore studies of authors were concentrated on desulphurization kinetics of nonfluxed and fluxed Sokolov-Sarbai and Kostomuksha pellets, having different content of initial Sulphur in concentrate at nonisothermal heating.Regime peculiarities of sulphuric pellets thermal treatment in a layer considered. Recommendations on roasting regime of pellets layer elaborated, which enable to decrease the sulfates decomposition degree.   The mechanism and kinetics of calcium sulfate dissociation at temperatures and gas content, typical for conveyer and sintering machines, studied. The temperature level determined, at which maximum dissociation velocity of calcium sulfate is reached. Simulation of the process of pellets thermal treatment in air and in helium media realized. It was shown that at roasting in a lowoxidizing atmosphere the sulphur content in pellets, roasted at correspondent temperatures, was decreased considerably. Rational iron ore pellets roasting regimes elaborated aimed at their acceptable properties both by strength and by Sulphur content. 

scholarly journals Manganese Ore Thermal Treatment Prior to Smelting

2018 ◽  
Vol 3 (5) ◽  
pp. 71 ◽  
Author(s):  
Y Gordon ◽  
J Nell ◽  
Y Yaroshenko
Keyword(s):  
Thermal Treatment ◽  
Manganese Ore

.

Concentrating Solar Thermal Process Heat for Manganese Ferroalloy Production: Plant Modelling and Thermal Energy Storage Dispatch Optimization

2020 ◽  
Author(s):  
Tristan Mckechnie ◽  
Craig McGregor ◽  
Gerhard Venter
Keyword(s):  
Steel Production ◽  
Environmental Benefits ◽  
Solar Thermal ◽  
Ferroalloy Production ◽  
Smelting Process ◽  
Manganese Ore ◽  
Production Plant ◽  
Arc Furnaces ◽  
Manganese Ferroalloy ◽  
Process Heat

Abstract This paper investigates the economic benefit of incorporating solar-based preheating of Manganese ore before smelting in electric submerged arc furnaces. Manganese ore is smelted to produce Manganese ferroalloy, a key component in steel production. The smelting process is highly energy intensive, with temperatures up to 1600 °C. The paper discusses the developed methodology for determining the configuration of a concentrating solar thermal (CST) plant to produce high temperature process heat. The CST plant is sized to preheat the ore to 600 °C before it enters the smelter — currently ore enters at ambient temperature. The preheating leads to economic and environmental benefits by offering lower cost heat and reducing carbon emissions for the process.

scholarly journals Entropy generation analysis for forced convection boiling in absorber tubes of linear fresnel reflector solar thermal system

2020 ◽  
Vol 24 (2 Part A) ◽  
pp. 735-743
Author(s):  
Sanju Thomas ◽  
Ajith Kumar ◽  
Sudhansu Sahoo ◽  
Shinu Varghese
Keyword(s):  
Heat Flux ◽  
Pressure Drop ◽  
Forced Convection ◽  
Entropy Generation ◽  
Phase Region ◽  
Solar Thermal ◽  
Thermal System ◽  
Two Phase ◽  
Linear Fresnel Reflector ◽  
Solar Thermal System

A methodology has been presented related to entropy generation due to forced convection boiling in long absorber tubes used in linear Fresnel reflector solar thermal system. Variable heat flux has been applied on the tube which replicates the scenario for aforementioned tubes and local entropy generation has been obtained for various parameters. Mathematical modeling has been made separately for single-phase and two-phase regions in flow boiling conditions encountered in linear Fresnel reflector tubes. Entropy generation in two-phase region has been formulated using homogeneous equilibrium model. The entropy generation at varying mass flux and heat flux cases are calculated. The entropy generation due to heat transfer is found to be more than that of pressure drop. Still, entropy generation due to pressure drop in two-phase region plays a major role of increasing nature of it. Present approach will help researchers and industry to optimize the solar thermal systems where flow related phase change occurs and measures can be taken accordingly to increase energy efficiency of those systems.

scholarly journals Solar thermal treatment of manganese ores

2018 ◽  
Author(s):  
Susanna A. C. Hockaday ◽  
Quinn G. Reynolds ◽  
Frank Dinter ◽  
Thomas Harms
Keyword(s):  
Thermal Treatment ◽  
Solar Thermal ◽  
Manganese Ores
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