Reduction of Magnetite from Copper Smelting Slag using Petro-diesel and Biodiesel

Li, Bo; Wei, Yonggang; Wang, Hua; Yang, Yindong

doi:10.2355/isijinternational.isijint-2017-723

Cited by 22 publications

(9 citation statements)

References 18 publications

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“…In HYBRIT, the coking coal in steelmaking is replaced with hydrogen in a direct reduction process, thus replacing the traditional blast furnace [25,26]. The recovery of valuables in copper slag cleaning by alternative reducing agents, such as hydrogen, biodiesel, and CO-CH 4 -Ar gas mixtures, has been studied by Nagasaka et al [27], Li et al [28], and Huaiwei et al [29], respectively. It was recognized that these could be viable options for replacing coke.…”

Section: Introductionmentioning

confidence: 99%

Integrated Battery Scrap Recycling and Nickel Slag Cleaning with Methane Reduction

et al. 2020

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Innovative recycling routes are needed to fulfill the increasing demand for battery raw materials to ensure sufficiency in the future. The integration of battery scrap recycling and nickel slag cleaning by reduction with methane was experimentally researched for the first time in this study. Industrial nickel slag from the direct Outotec nickel flash smelting (DON) process was mixed with both synthetic and industrial battery scrap. The end products of the slag-scrap mixtures after reduction at 1400 °C in a CH4 (5 vol %)-N2 atmosphere were an Ni–Co–Cu–Fe metal alloy and FeOx–SiO2 slag. It was noted that a higher initial amount of cobalt in the feed mixture increased the recovery of cobalt to the metal alloy. Increasing the reduction time decreased the fraction of sulfur in the metal alloy and magnetite in the slag. After reduction, manganese was deported in the slag and most of the zinc volatilized. This study confirmed the possibility of replacing coke with methane as a non-fossil reductant in nickel slag cleaning on a laboratory scale, and the recovery of battery metals cobalt and nickel in the slag cleaning process with good yields.

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Section: Introductionmentioning

confidence: 99%

Integrated Battery Scrap Recycling and Nickel Slag Cleaning with Methane Reduction

et al. 2020

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“…Magnetite is common in many ore deposits and host rocks, and its presence in CSFT was expected. [39] Fayalite represents a ferrous iron silicate that belongs to the olivine minerals group. In CSFT, fayalite is the artificial mineral that arises in a high temperature process with low oxygen amount (calcination process) with a naturally elevated amount of silicon dioxide.…”

Section: Mineral Composition (Xrd Analysis)mentioning

confidence: 99%

Application of Copper Mining Waste in Radionuclide and Heavy Metal Immobilization

Dimović

Jelić

Šljivić-Ivanović

et al. 2021

CLEAN Soil Air Water

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Copper slag flotation tailings (CSFT), as the end waste from copper mining, are evaluated for radionuclide and heavy metal immobilization. Characterization of CSFT based on grain size and mineral composition, surface functional groups, pH and electrical conductivity in aqueous media, thermogravimetric analysis (TGA), determination of characteristic temperatures in sample melting process, leachability, and toxicity tests is conducted. The screening sorption of Mn(II), Co(II), Ni(II), Zn(II), Cd(II), and Pb(II) inactive isotopes from single-component solutions is performed. The Cd(II) ions show better sorption potential than other ions, with a sorption capacity of 0.08 mmol g −1 at the highest initial concentration. Sorption decreases in the sequence Cd(II) > Pb(II) > Zn(II) > Mn(II) > Ni(II) > Co(II) at all initial concentrations. Although CSFT shows lower sorption capability than synthetic sorbents based on fayalite and magnetite, its inexpensiveness and substantial accessible amount represent great advantages in wider utilization.

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“…The gaseous reducing agents used in the processes of copper recovery from slags are usually hydrogen, methane, carbon monoxide or natural gas [ 45 , 46 , 47 ]. It should also be mentioned that there are also studies aimed at replacing the solid carbon reducing agents with biomass and waste oils [ 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

et al. 2023

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The article presents the results of a study on metallurgical sludge reduction using electronic waste such as Printed Circuit Boards (PCBs). Two aspects were taken into account when selecting such a reducer, namely the environmental aspect and the technological aspect. The research was an attempt to use waste metal-bearing material of which the effective management causes many problems from an environmental point of view. In the technological aspect, the specific chemical composition of this waste was taken into account. Its gasification yields significant amounts of hydrocarbons, which are excellent reducing agents in such process. The separation of these compounds may additionally cause the mixing of the molten slag, which should result in faster separation of the formed metal droplets and the molten slag. In the case of the fragmented PCB (Printed Circuit Board) reducer used in this study, a significant degree of copper removal was achieved, as much as 92%. As the reduction-process time increased, the degree of copper removal also increased. For the 1 h process, the average value of copper removal was 60%, and for the 4.5 h process it was over 70%. The case was the same with the addition of reductant: as the amount of reductant added to the process increased, an increase in copper removal was observed. With the addition of 30 g of the reducing agent (per 65 g of slag), the degree of copper removal was over 90%.

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Reduction of Magnetite from Copper Smelting Slag using Petro-diesel and Biodiesel

Cited by 22 publications

References 18 publications

Integrated Battery Scrap Recycling and Nickel Slag Cleaning with Methane Reduction

Integrated Battery Scrap Recycling and Nickel Slag Cleaning with Methane Reduction

Application of Copper Mining Waste in Radionuclide and Heavy Metal Immobilization

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

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