Rare Metal Extraction & Processing: Poster Session
Sponsored by: TMS Extraction and Processing Division, TMS: Hydrometallurgy and Electrometallurgy Committee
Program Organizers: Gisele Azimi, University of Toronto; Takanari Ouchi, University of Tokyo; Hojong Kim, Pennsylvania State University; Shafiq Alam, University of Saskatchewan; Kerstin Forsberg, KTH Royal Institute of Technology; Alafara Baba, University of Ilorin
Tuesday 5:30 PM
February 25, 2020
Room: Sails Pavilion
Location: San Diego Convention Ctr
Session Chair: Gisele Azimi, University of Toronto; Kerstin Forsberg, KTH Royal Institute of Technology
M-80: A Novel Depressant of Sodium Polyacrylate for Magnesite Flotation: Hongwei Cheng1; Changmiao Liu1; Dong Dong1; Zihu Lv1; Fei Yang1; 1Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS
In order to inhibit magnesite effectively, a new macromolecule reagent, sodium polyacrylate (SP), is introduced. Micro-flotation results indicate that SP can strongly inhibit the flotation of magnesite in a wide pH range. When pH=9, the flotation recovery of magnesite is 90%. After increasing the dosage of SP to 10mg/L, the flotation recovery of magnesite declines to below 20%. Mineral crystal structure and solution chemistry show that SP easily absorbs the Mg2+ active sites on the surface of magnesite. Meanwhile, SP could form a bridge among the magnesite particles and lead to the flocculation and sedimentation, thus inhibiting the magnesite flotation.
Cancelled
M-81: Dissolution Behavior of Calcium Vanadates and Magnesium Vanadates in Sulfuric Acid: Xin Wang1; Junyi Xiang1; Qingyun Huang2; Xuewei Lv1; 1College of Materials Science and Engineering, Chongqing Univesity; 2College of Metallurgical and Materials Engineering, Chongqing University of Science and Technology
The leaching efficiency of vanadium is the key to improve the recovery of vanadium from vanadium-bearing converter slag by calcification roasting - acid leaching process. An improved process, which involves roasting with calcium-magnesium salts, followed by acid leaching, was found to have a positive effect on the vanadium recovery. In this process, CaO-MgO-V2O5 is the basic system in the roasting step. In this study, the leaching behavior of calcium vanadates (CaV2O6, Ca2V2O7, and Ca3V2O8) and magnesium vanadates (MgV2O6, Mg2V2O7, and Mg3V2O8) in sulfuric acid was investigated. The effect of leaching temperature, pH value, and liquid/solid ratio, on the leaching behavior was determined. The results have shown that both leaching temperature and liquid/solid ratio have significantly effects on the leaching efficiency of vanadium, while pH value has relatively minor effect under the studied conditions. Furthermore, the leaching efficiency of magnesium vanadates has been found much higher than that of calcium vanadates.
M-82: PRICE - PRocess Industries in the Circular Economy: Dag Eriksen1; 1University of Oslo, Norway
PRICE is an acronym for PRocess Industries in the Circular Economy. The main objective of the project is to prepare the collaborating industrial partners to the circular economy. This competence building project gathers industrial partners, research institutes, and the two largest universities in Norway.The participants are: Boliden Odda, Glencore Nikkelverk, KA Rasmussen, NOAH, Solberg Industri, Yara International, SINTEF industry, University of Oslo, and the Norwegian University of Science and Technology (NTNU). To reach this ambitious goal there are sub-objectives: Increased recirculation and recovery of metals and minerals – in general and between the participants in PRICE; Understanding the behavior (speciation) of and recovery or removal of valuable elements and toxic components present at low concentrations in process solutions; Use of electrochemical means to enhance separation of elements present in trace concentrations; Assessment to evaluate the impacts of circular economy value-chains through environmental modelling (LCA) and techno/economic optimization.