The results obtained from the work on a concept of recycling process for NdFeB magnets to recover rare earth elements remanufacturing similar are presented. This paper investigates viability extracting metals magnet recycling-derived oxide (MRDO) by means molten salt electrolysis. MRDO was produced spent through oxidation in air and subsequently carbothermic reduction under an 80 mbar Ar gas at...

The reaction mechanism of the carbothermic reduction Fe3O4 powder heated by radiating multi-mode microwave with 2.45 GHz and 2.8 kW was clarified means gas analysis changing contact state mixed powder. process classified in three stages. In stage I, magnetic loss induction current graphite (Gr) reached peak temperature 1000°C to 1200°C 30 s 40 after irradiation, then dropped rapidly at 600°C 70...

Systems based on Ce-Zr are used in catalytic converters for their oxygen storage ability. Recently, their application for soot abatement is under investigation. In this paper, preliminary results of the performance of Ce-Zr systems with the addition of K are reported by varying potassium content and calcination temperature. The powder catalysts were prepared by a variant of the citrates route d...

Silicomanganese (SiMn) is an alloy used in steelmaking to provide both Si and Mn additions at low carbon contents. In South Africa, SiMn is produced in three-phase alternating current (AC) submerged arc furnaces (SAFs) by carbothermic reduction of manganese ores in the form of lump, sinter, and briquettes (Steenkamp and Basson, 2013). In a SAF the electrode tips are submerged in a porous charge...

Phosphorus is an attractive negative electrode material for sodium ion batteries due to its high theoretical specific capacity of 2596 mA h g . However, it suffers poor conductivity (10 12 S m ), slow reaction dynamics, and large volume expansion ( 440%) during the sodiation process, leading to rapid capacity decay upon cycling. Great attention has been devoted to improving the electrical condu...

This paper investigates the use of shop-floor ferrous scrap that contains iron ore as a raw material for purpose making steel products through an in situ carbothermic reduction. The technique powder metallurgy (PM) was used studying reduction followed by densification during sintering. Two sources oxide—ferrous grinding-sludge and ore—and three carbonaceous material—graphite, charcoal, carbon b...

Demand for niobium and tantalum is increasing exponentially as these are essential ingredients the manufacture of, among others, capacitors in technological devices ferroniobium. Mine tailings rich such elements could constitute an important source of Nb Ta future alleviate potential supply risks. This paper evaluates possibility recovering from slags generated during tin beneficiation process ...