Possibilities of a Direct Synthesis of Aluminum Alloys with Elements from Deep-Sea Nodules

Borkovcová, Klára; Novák, Pavel

doi:10.3390/ma15134467

Cited by 2 publications

(3 citation statements)

References 25 publications

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“…The processing of deep-sea nodules is carried out as an extraction of the metals contained in them. Nowadays, two types of extraction procedures are used to obtain the metal of interest -pyrometallurgical process, followed by hydrometallurgical process, or hydrometallurgical treatment (leaching) only [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…In this work, microstructure, mechanical properties and phase composition of new alloys produced by silicothermic reaction from deep-sea nodules were tested. Obtained results were compared with articles on the aluminothermic reduction of deep-sea nodules [4,7].…”

Section: Introductionmentioning

confidence: 99%

“…1. Using equations based on the Ellingham diagram, the stoichiometric amount of silicon required for silicothermic reduction was calculated [4,7]. According to the calculation, 32 g of silicon had to be used for 100 g of nodules.…”

Section: Introductionmentioning

confidence: 99%

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Processing of Deep-sea Nodules by Silicothermic Reduction

Borkovcová¹,

Novák²,

Chmelíková³

2023

Manufacturing Technology

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Deep-sea nodules are ores formed on the sea floor at depths of 3000 to 6000 m as a result of sedimentation. They range in size from 1 cm to 15 cm and contain mainly manganese and iron and other elements that are collected from the nodules by complex pyrometallurgical and hydrometallurgical processes. These other elements of interest are bound in the nodules mainly in the form of manganese and iron oxides. In order to achieve a high yield of metals bound in nodules in the form of oxides, it is necessary to disintegrate this arrangement in the lattice. This can be achieved by exposing the deep-sea nodules to a reducing condition. This paper deals with the one-step recovery of metals of interest from nodules using silicothermic reduction with 10% excess silicon over stoichiometry. The phase composition, microstructure and mechanical properties of the obtained reduced material were determined.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Processing of Deep-sea Nodules by Silicothermic Reduction

Borkovcová¹,

Novák²,

Chmelíková³

2023

Manufacturing Technology

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Microstructure and Properties of Natural Alloy Prepared by Aluminothermic Reduction of Deep-Sea Nodules and Processed by Rapid Solidification

Michalcová,

Orlíček,

Novák

2024

Manufacturing Technology

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This paper explores the investigation of a natural alloy processed using the rapid solidification technique. The study involves the reduction of manganese nodules through aluminothermy with a 20 wt. % excess of aluminum, followed by further processing of the resulting alloy using the melt-spinning process. The obtained melt-spun ribbons were subjected to a comprehensive analysis, including X-ray diffraction, scanning electron microscopy for microstructure observation, and EDS analysis for local chemical composition. The research unveiled that the rapidly solidified ribbons consist of several key phases, including β-Mn, the Heusler phase Mn2FeSi, and an intermetallic phase (Cu,Mn)3(Al,Si). Importantly, the phase composition exhibited notable differences from that of the as-reduced alloy, with a reduced number of phases in the rapidly solidified ribbons. Notably, the phase composition remained stable even after annealing, demonstrating the robustness of the rapidly solidified material. Impressively, the material exhibited a remarkable hardness of approximately 800 HV 0.1, even after 100 hours of annealing at temperatures of 500 and 750°C.

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Possibilities of a Direct Synthesis of Aluminum Alloys with Elements from Deep-Sea Nodules

Cited by 2 publications

References 25 publications

Processing of Deep-sea Nodules by Silicothermic Reduction

Processing of Deep-sea Nodules by Silicothermic Reduction

Microstructure and Properties of Natural Alloy Prepared by Aluminothermic Reduction of Deep-Sea Nodules and Processed by Rapid Solidification

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