Extraction of Platinum Group Metals
About 80% of the worlds' reserves for platinum group metals (PGMs) are in South Africa's Bushveld Igneous Complex. Processing of PGM involves comminution, flotation, smelting, converting, base metals refinery and precious metals refinery. Due to increasing chrome content in the feed and the challenges associated with operating high chrome feed, alternative routes …
Study of Metal Leaching from Ore Dressing Tailings
Abstract The depletion problem of available mineral resources is outlined and the reasons for its actualization due to incomplete extraction of metals from mined ores are characterized. The authors note that the strategy of the mining industry may be the use of non-traditional technologies for the extraction of metals as part of a combination of traditional and …
Mineral processing: leaching process of chromium and …
The current strategy reports the recovery of precious group metals (PGMs) from Na2CO3 roast of Saudi Arabian ophiolitic chromite ore at 1160 °C under atmospheric O2. The influence of roasting temperature (960–1200 °C) and leaching agents (H2O, HCl, H2SO4) and their concentrations on the recovery of PGMs was studied. Chromite roast concentrates a …
Recover PGM by Matte Smelting and Leaching
These processes alleviate the SO2 pollution problem but require high-pressure autoclaves. The Falconbridge Matte Leach Process involves selective leaching of nickel from a Cu-Ni-PGM matte with strong HCl at atmospheric pressure. The nickel is solubilized, while the copper and PGM remain as a sulfide residue.
LECTURE NOTES
So mineral dressing or ore dressing is commonly regarded as processing of raw ores to yield marketable products by such physical means those do not destroy the physical and chemical identity of the ore. Economic Justification of Mineral Dressing: 1. To purify and upgrade the ore:
Potential Processing Routes for Recovery of Platinum Group …
This process involves roasting of the PGM ore followed by acidic bromine leaching of the oxidized PGM ore. In this process, sulfuric acid is used for acidity control, bromine ions …
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Easily extract Au, Ag, PGM metals from either rock ore materials or E-waste (electronic scrap metals, catalyst converters and solar panel) materials. ... Eco-Goldex Agent can seamlessly replace cyanide in rock ore leaching process without change of existing flowsheet and equipment. The unique selective extraction feature of the agent makes it ...
STAURK Metallic gold ore dressing agent China leaching …
STAURK Metallic gold ore dressing agent China leaching reagent for gold mine, (3) Product transportation and storage 1. The product is non-flammable, non-explosive, non-oxidizing, non-radioactive, and has no other transportation hazards. ... Usage: heap leaching or pool leaching process with clean water to prepare a solution with a mass ...
Direct leach approaches to Platinum Group Metal (PGM) …
Ore is first ground by conventional multistage crushing and ball milling, or by semi-autogenous grinding (SAG), and then smelted. The matte is hydrometallurgically treated to …
The Effect of Roasting on the Recovery of PGMs from …
The study highlights the complexity of the Pd leaching process from chromite ores and the critical need to optimize roasting conditions to achieve effective PGM recovery.
(PDF) A conceptual hybrid process flowsheet for platinum group metals
Accepted Manuscript A conceptual hybrid process flowsheet for platinum group metals (PGMs) recovery from a chromite-rich Cu-Ni PGM bearing ore in oxidized mineralization through a single-stage leach and adsorption onto ion exchange resin Cleophace Ngoie Mpinga, Jacobus Johannes Eksteen, Chris Aldrich, Laurence Dyer PII: DOI: Reference: S0304 ...
Commercial Processes for the Extraction of Platinum Group Metals …
Several researchers have also reported hydrometallurgical or the combination pyro-hydrometallurgical processes as a pre-treatment step for the recovery of PGM from ores/concentrates [17,18,19,20,21,22].Hydrometallurgical processes consisting of leaching operation for enrichment PGMs from base metal (Cu, Ni, Co, Fe) sulfide minerals have also …
Basics of mineral processing | PPT
9 A1. Crushing and screening is the first controlled size reduction stage in the process. This is the main process in aggregate production and a preparation process for further size reduction. A2. Grinding is the stage of size reduction (wet or dry) where the liberation size for individual minerals can be reached.
PGM Ore Processing
Recycling of platinum group metals from automotive catalysts by an acidic leaching process; Tailings scavenging – the complete story; Centralized wireless remote blasting; Redefining competitive advantage in the South African platinum market; A symphony of collaboration between mining and engineering
Mineral Processing and Ore Dressing
Before the event of ore dressing, crude ores were shipped directly to the smelters, or the refineries, with the shipper paying the freight and treatment ... This process is based on one main fact, that a sulphide mineral particle and also other minerals properly treated, will adhere to the surface of an air bubble, and that gangue and rock ...
Kell hydrometallurgical process for extraction
PGM sulphides, amphoterics (bismuthides, tellurides, arsenides) and alloys with other metals. The PGM minerals present in the ore have varying associations with base metal sulphide minerals and gangue minerals. The Kell hydrometallurgical process for extraction of platinum group metals and base metals from flotation concentrates
(PDF) Overview of Mineral Processing Methods
The first process that most of the ores or minerals undergo after they leave any mine, is mineral processing or mineral/ ore dressing. It is a process of ore preparation, milling, and ore dressing ...
PGM extraction from oxidized ores using flotation and …
Flotation and leaching were investigated as possible processing routes for improving PGM recovery from a Southern African oxidized PGM ore. Different flotation reagent schemes and …
THE ADSORPTION AND ELUTION OF PLATINUM …
processing route for PGM concentrates. Leaching of PGMs with cyanide has been proposed a number of times as a promising PGM process option. Mwase et al. (2012) proposed a conceptual flow sheet for heap leaching of PGMs from a low-grade ore concentrate. Chen and Huang (2006) and Huang et al. (2006) investigated two-stage selective pressure-leaching
Potential Processing Routes for Recovery of Platinum Group Metals …
This process involves roasting of the PGM ore followed by acidic bromine leaching of the oxidized PGM ore. In this process, sulfuric acid is used for acidity control, bromine ions for the formation of PGM complexes, and bromine for redox potential control . The simplified flow diagram of the TLM process is shown in Fig. 9.
Challenges & Process Flow of Chromium Ore Dressing …
Chromium ore dressing mainly uses various technologies such as gravity separation, flotation and magnetic separation, which help to improve the quality of chrome concentrate and maximize recovery. Among them, flotation is suitable for the dressing of chromium ore with a large amount of fine particles or rich in silicate minerals, separating …
A Comprehensive Guide to Gold Ore Automation Processing …
Leaching is a critical process in which chemicals are used to dissolve gold from the ore. Automation in leaching processes includes: Automated Chemical Dosing Systems: These systems precisely control the amount of chemicals added to the leaching solution, optimizing the extraction process. Real-Time Monitoring: Sensors continuously monitor ...
Planning and Design of a Process for PGM Ore Dressing
Leaching Two main steps are involved is Contact of liquid solvent with the solid to effect transfer of solute from the solid to the solvent. Separation of resulting solution from the residual solid. …
Comminution a Heart of Mineral Processing
Ore deposit is the gathering of ore where ore is defined as a rock or sediment which contains sufficiently high levels of minerals that can be profitably extracted.
PGM extraction from oxidized ores using flotation …
Flotation and leaching were investigated as possible processing routes for improving PGM recovery from a Southern African oxidized PGM ore. Different flotation reagent schemes and lixiviants were evaluated and their PGMs …
PROCESSING OF GOLD-BEARING SAND DUMPS: A CASE …
Heap or vat leaching is a process that has been extensively used for the recovery of valuable metals like copper, gold (Au) and silver. The ore is prepared for vat leaching by either crushing or ...
Mineral dressing (= Orebeneficiation)
Mineral dressing (= Orebeneficiation) The first process most ores undergo after they leave the mine is mineral dressing (processing), also called ore preparation, milling, and ore dressing or ore beneficiation. Ore dressing is a process of mechanically separating the grains of ore minerals from the gangue minerals, to produce a concentrate ...
Recovery of PGMs from an oxide ore by flotation and …
Figure 12: Experimental flow diagram for processing of oxidised PGM ore through a multi-step leaching approach, adapted from (Kraemer et al, 2015). …
Leaching and recovery of platinum group metals from …
Leaching and recovery of platinum group metals from UG-2 concentrates yields were not good (less than 40 per cent). Platinum leaching was particularly poor with cyanide (ambient temperature). A HCl/chlorine leach on untreated material had the same effect as a cyanide leach with a nitric acid pre-leach,
Ore dressing | PPT
The document summarizes the key steps in the ore dressing (mineral processing) process. It describes four main steps: 1) Comminution which involves crushing and grinding ore to reduce particle size. ... Leaching – is the process of extracting substances from a solid by dissolving them in a liquid, either in nature or through industrial ...