Production of Ferrosilicoaluminium from Aluminum Slag and Local Ore Via Carbothermic Reduction

Faramawy, Hoda El; Ghali, Saeed; Mishreky, Michel L.

doi:10.4028/www.scientific.net/kem.835.75

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…According to studies [22][23][24], the recycling of aluminum-bearing secondary oxide materials and the secondary application of extracted aluminum would achieve particularly high and stable efficiency in the carbothermal production of special deoxidizing agents, ligatures, and modifiers of cast iron and steel, particularly in the smelting of non-standard complex multicomponent ferroalloys of the Fe-Si-Mn-Al system. On the one hand, the aforementioned approach extends the life cycle of this essential valuable metal, and on the other, by deoxidizing and improving the quality of the treated steel, it serves as an auxiliary tool for extending the service life of products and structures made from it.…”

Section: Advanced Environmentally Friendly Recovery Technologiesmentioning

confidence: 99%

“…To emphasize the metallurgical value of the aforementioned aluminum-bearing slags and the feasibility of methane reduction, it is necessary to mention the possibility and efficiency of direct carbothermal reduction of silicon and iron from the corresponding oxide compounds or waste [32,33]. It is important to emphasize this because silicon and iron oxides are almost always present with the target aluminum oxide in the metallurgical slags of the aluminum industry and, according to the studies [22,23,24,34], this would be considered a very positive, auxiliary factor for their joint recovery, increasing the degree of extraction of valuable aluminum and receiving special multicomponent ligatures with high added value that are in demand by the industry.…”

Section: Advanced Environmentally Friendly Recovery Technologiesmentioning

confidence: 99%

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Development and investigation of the technological process of plasma carbothermal reduction of slag from secondary metallurgy of aluminum

Sakhvadze¹,

Janelidze

Mikadze

2022

Metall Mater Eng

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Based on a critical analysis of the current state and prospects of development of the problem of pyrometallurgical recovery/extraction of aluminum from aluminum-bearing industrial waste, the need to replace traditional, electrocarbonothermic processes and melting process units with innovative, plasma carbothermal processes and furnace-reactors, with the possibility of reverse feeding and recovery of gasified during melting metal and metal oxide components is substantiated. On the basis of this analysis a new technological scheme of smelting with a new design of plasma-arc furnace-reactor, which provides a solution to the problem using a special hollow double-shell graphite cathode connected to the system of circulating supply of gases separated from the reaction zone, was developed and presented. The proposed technological scheme also differs in the use of such highly active liquid and gaseous reagents as carbon-containing reducing agents as calcium carbide (CaC2) and methane (CH4). The main features of chemism of reducing processes are described. It is shown that by replacing traditional coke with anodized calcium carbide and natural gas (methane) the recovery rate of aluminum oxide (Al 29-34%) and silica (SiO2) and hematite (Fe2O3) present with it increases to 80-99%. Specific power consumption is reduced by 35-40%, the 90-95% reduction in the loss of target elements, the 80% reduction in the emission of greenhouse carbon dioxide, which is replaced by a very valuable recyclable synthesis gas - CO-H2. By additionally feeding separate portions of quartzite and steel-rolling scale in the furnace-reactor, a complex alloy-ligature of Fe-Si-Al-Ca system is melted, with the ratio of components: 1:[1.3-2]:[1.3-1.2]:[0.9-1.25]. With the introduction into industrial practice of the plasma carbothermal process of aluminum reduction from secondary aluminum dumping slags accumulated in the world (4 million tons/year), it will be possible to return up to 1-1.5 million tons/year of aluminum to the production processing cycle.

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Section: Advanced Environmentally Friendly Recovery Technologiesmentioning

confidence: 99%

Section: Advanced Environmentally Friendly Recovery Technologiesmentioning

confidence: 99%

Development and investigation of the technological process of plasma carbothermal reduction of slag from secondary metallurgy of aluminum

Sakhvadze¹,

Janelidze

Mikadze

2022

Metall Mater Eng

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Value Extraction from Ferrochrome Slag: A Thermochemical Equilibrium Calculation and Experimental Approach

Sahu,

Kapure,

Kumar

et al. 2024

Minerals

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The valorization of slag from the production of high-carbon ferrochrome is a challenge for ferrochrome producers. The recycling of high-carbon ferrochrome slag was explored through the smelting route to recover Fe–Si–Al–Cr alloys and reengineer the residual slag for alumina-enriched refractory material. In this research, the focus was to reduce the SiO2% and enrichment of Al2O3% in the final slag and recover the metallic value in the form of a complex alloy containing Fe, Si, Cr and Al. The manuscript consists of a thermochemical simulation of the smelting of FeCr slag followed by smelting experiments to optimize the process parameters such as temperature and the addition of coke, cast iron and alumina. An experimental investigation revealed that the maximum recovery of Si (57.4% recovery), Al in the alloy (20.56% recovery) and Al2O3 (85.78% recovery) in the slag was achieved at a charge mix consisting of 1000 g of FeCr slag, 300 g of alumina, 200 g of cast iron and 300 g of coke. The present study also demonstrated the usefulness of prior thermochemical calculations for smelting metallurgical wastes such as slag from high-carbon ferrochrome production for value creation and reutilization purposes.

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Production of Ferrosilicoaluminium from Aluminum Slag and Local Ore Via Carbothermic Reduction

Cited by 2 publications

References 5 publications

Development and investigation of the technological process of plasma carbothermal reduction of slag from secondary metallurgy of aluminum

Development and investigation of the technological process of plasma carbothermal reduction of slag from secondary metallurgy of aluminum

Value Extraction from Ferrochrome Slag: A Thermochemical Equilibrium Calculation and Experimental Approach

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