Showing papers in "Hydrometallurgy in 2019"

TL;DR: A review of the major developments in lithium recovery from brines, starting from an overview of lithium demand and consumption, available resources and processing methods, and challenges of processing brines is presented in this paper.

TL;DR: In this paper, a review compiles extensive studies on treatment of secondary solid wastes employing chemolithotrophs (acidophiles) and organotrophics (fungi and cyanogens) for metal extraction, and the mechanism of bioleaching, candidate microbes, metal extraction efficiency, operational strategies and process improvement are extensively reviewed, discussed and reported.

TL;DR: In this article, the major mineral deposits of Li are summarised and illustrated, which shows its high abundance and wide distribution around the global, and various methods of Li recovery reported so far are then summarised with flowsheets and discussed by different type of minerals, covering spodumene, lepidolite, zinnwaldite, amblygonite and clays.

TL;DR: A review of the application of the sulfuric acid bake process to ores/concentrates containing mainly monazite, xenotime and bastnasite, and other less common rare earth minerals including euxenite, samarskite, fergusonite, loparite, allanite, eudialyte and pyrochlore is given in this paper.

TL;DR: In this article, coal fly ash samples from different power plants of India have been collected and studied for their rare earth content and recovery, and the analysis of major and trace elements was done by ICP-AES.

TL;DR: In this paper, the adsorption/extraction for light (La3+) and heavy (Yb3+) REE of kaolinite (Kao), montmorillonite (Mt), muscovite (Ms), illite (Ilt), were systematically investigated and compared.

TL;DR: In this paper, a review of the process developed for extraction and recovery of manganese from ores using different kinds of reducing agents is presented, including reduction roasting followed by leaching and reductive leaching.

TL;DR: In this paper, the authors investigated the leaching kinetics of aluminum extraction from secondary aluminum dross by using hydrochloric acid and showed that the extraction rate of aluminum in SAD could reach 22% under optimal conditions.

TL;DR: In this paper, the authors give an overview of recent advances in the development of electrodialysis technology, which could be an asset for the next generations of processes involved in lithium production.

TL;DR: In this paper, a novel precipitant, sodium metasilicate nonahydrate, was investigated as a new magnesium precipitant for separating lithium from magnesium in brine with a high Mg/Li mass ratio.

TL;DR: In this paper, the authors compared and analyzed the different industrial processes for cadmium removal from WPA, starting with solvent extraction, and considering also precipitation, ion exchange, adsorption, flotation, and even the more recent membrane processes that can become a relevant alternative.

TL;DR: In this paper, an effective and environmentally friendly process was developed for recovering metals present in lithium-ion batteries (LIBs), using a mechanical process followed by heat treatment and leaching using malic, citric, and formic acids at concentrations of 2.

TL;DR: In this article, gold and silver were recovered from waste printed circuit boards (WPCBs) with the use of ammonia-thiosulfate solutions and the MTA 5011 ion exchange resin.

TL;DR: In this paper, the surface modifications of the new titanium DSAs could be the alloying of the PGMs at low temperatures, and the discussed results are related to the increase of current density by using alternative types of anodes and charge transfer between specific PGMs as well as chemical reaction engineering, and surface acidity in the catalysts.

TL;DR: In this paper, a bio-electro-hydrometallurgical platform was constructed to efficiently recover cobalt (Co), lithium (Li), and manganese (Mn) from the cathode active materials (CAMs) of spent lithium batteries.

TL;DR: In this paper, a pyro-hydrometallurgical approach involving a thermal treatment was proposed to convert rare-earth phosphates into oxides, which can be more easily leached by mineral acids (HCl and H2SO4) in a further leaching step.

TL;DR: In this article, six different slags generated by reductive smelting of the same bauxite residue sample were treated by high-pressure acid leaching (HPAL) with HCl and H2SO4 to selectively extract rare earth elements (REEs).

TL;DR: In this article, the authors used trifluoromethanesulfonic acid (TFMS) for the first time in the leaching of SRICs at a temperature of 90 °C, where leaching efficiencies of 85.9, 60 and 28.4% were achieved for Cu, Zn, and Ni respectively.

TL;DR: In this article, the activation energy of a natural ore sample (that contained 48.7% bornite and 15.8% chalcopyrite) in a solution of methanesulfonic acid and ferric chloride was studied.

TL;DR: In this paper, a novel macroporous silica polymer (SiO2-P) based di(2-ethylhexyl) phosphonate adsorbent was synthesized by vacuum impregnation method for separating Sc from the other rare earth elements (REEs).

TL;DR: In this paper, simultaneous extractions of lithium, rubidium and cesium from a lepidolite concentrate were conducted through a low-temperature sulfuric acid baking and water leaching route.

TL;DR: In this paper, Li et al. showed that α-spodumene can be directly decomposed by alkali, and showed that the addition of CaO and a higher temperature and alkalinity had a significant influence on the decomposition reaction.

TL;DR: In this paper, a spinel type of LTMO was synthesized by the high-energy milling of a titania (TiO2), Li2CO3, and manganese carbonate (MnCO3) mixture and subsequent heat treatment.

TL;DR: A suite of leaching tests of chalcopyrite at 75°C with various lixiviants exhibited that MSA showed the highest copper extraction of 47% at 96 h with 30 g/L MSA and 5.5 g/L ferric as mentioned in this paper.

TL;DR: In this article, the authors studied the impact of chelating resins on the performance of the resin-in-leach (RIL) process for rare earth elements (REE) recovery.

TL;DR: In this article, a method using phosphate precipitation was investigated for the selective separation of chromium (Cr) from sulphuric acid leaching solutions for the harmless disposal and resource recycling of electroplating sludge.

TL;DR: In this article, the authors developed a process consisting of REMs leaching from Indian coal bottom ash (CBA) followed by solvent extraction and selective precipitation, which achieved maximum dissolution of residual salt using 4'mol/L HCl at 90'°C for 2'h and pulp density 50'g/L.

TL;DR: In this paper, Aspergillus niger was used to recover lanthanum from spent fluid catalytic cracking catalysts (SFCCC), which accounts for 8170 mg/Kg.

TL;DR: In this paper, a modified calcification-carbonation method was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution.

TL;DR: In this article, the technical feasibility of recovering uranium and molybdenum from industrial copper leaching solutions (PLS) using the ion exchange technique has been shown, without disturbing or changing the normal operation of the overall copper production process.