Atmospheric leach process of high-chromitite PGM
2018-8-15 The fast depletion of sulfide PGM-bearing minerals and the deteriorating socio-political environments in most primary PGM producing countries have triggered interest in exploring the recovery of these metals from high-chromium PGM-bearing oxidized ores sometimes contain relatively high marketable PGM values which have proven to be more difficult to process by conventional
Recovery of platinum group metals from oxide ores—TML
A conventional flotation-smelting process has been proposed to recover the platinum group metal (PGM) values from the sulfide ores. With the development of a low temperature roasting, acidic bromine leaching process by The Minerals Laboratory of BHP Minerals, substantial PGM recoveries from oxide and mixed oxide/sulfide ores are now possible.
(PDF) Direct leach approaches to Platinum Group Metal
2015-7-31 PGM ore from the Panton Sill deposit, a Bushveld-type deposit in the Kimberly region of Western Australia, contains 2.19 g/t Pt, 2.39 g/t Pd associated with
Leaching and recovery of platinum group metals from
2009-8-26 Leaching of PGM from ores is not trivial andwas expected to be the most problematic stepin a hydrometallurgical process. Some efforthas been expended by different investigatorson evaluating and testing possibilities forleaching of various types of ores.In Mintek’s most significant work, themineralogy of a feed to a leach was shown toaffect PGM recovery1–3. In the case of a UG-2feed tested2, only 30 per cent of PGM grainswere liberated, and 60 per cent of PGM grainswere associated with base metal sulphides(BMS; mainly pentlandite and chalcopyrite)either on edges or locked into BMS. Eighty-fiveper cent occurred as PGM-sulphides and theremainder as compounds with arsenic,bismuth, tellurium, antimony, iron, lead ormercury. Hence, accessibility of lixiviant tonon-liberated PGM and refractory species suchas PGM-sulphides would be expected to causepoor direct leachability.
Ammonia Leaching as a Pre-Treatment for the
2020-12-8 Both column leaching of whole ore and batch stirred tank reactor leaching of milled ore were investigated as pre-treatment methods for varying length of process times, and the material was subsequently tested for its flotation behaviour. The total solids, base metal and PGM recoveries were monitored in order to determine the effect of the
Mineral processing: leaching process of chromium and
2019-5-6 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 reasonable percentage of
A conceptual flowsheet for heap leaching of platinum
2012-1-1 It is proposed that a variation of these processes be investigated as the method for extracting the BMs from the low-grade ore concentrate prior to PGM leaching with cyanide. In microbially assisted leaching, iron oxidizing bacteria catalyze the oxidation of reduced sulfur compounds such as sulfides to elemental sulfur or sulfates by the ferrous/ferric couple. Additionally, sulfur oxidizing bacteria are
(PDF) Commercial Processes for the Extraction of Platinum
The Plasma arc smelting process for recovery of PGM s from the. J Ore Dressing 11(22) 40. Liddell KS, catalysts by an acidic leaching process. In: The Southern
OVERVIEW OF PGM PROCESSING
2015-1-12 PGM Concentrated Residues Tailings Purchased Concentrate Concentrate Furnace Matte Smelting Ore Anglo Converting Process (at Rustenburg) Our configuration differs from our competitors we have a broad footprint across all 3 Bushveld limbs. Consequently, our integrated production system is more complex (i.e.13
RECYCLING OF PLATINUM GROUP METALS FROM
2012-9-6 The most common technique is the leaching of the individual PGMs. As these metals show a very noble character, their resistance to dissolution is quite high. Consequently, strong acids in combination with oxidants are required in the leaching process. These conditions lead to the formation of soluble PGM complexes.
Direct leach approaches to Platinum Group Metal (PGM) ores
The conventional smelter-based process options are justifiable for high grade, low chromite, large resource and long life-of-mine operations. In the present paper, we review some of the most recent literature on the predominantly hydrometallurgical approaches to PGM extraction.
Atmospheric leach process of high-chromitite PGM-bearing
Using a high-chromium PGM oxidized mineralized ore, the hybrid pyro-hydrometallurgical and low-temperature single-stage salt chlorination process proved successful for simultaneously and efficiently leaching Cu, Ni, Pt and Pd without the need and/or addition of further oxidizing agents.
Process for recovering platinum group metals from ores
A process is described for the separation of platinum group metals (PGM) from ores also containing iron, nickel and copper as sulfides. The minerals in the ore are first concentrated by flotation and the ore concentrate is melted in an electric furnace to form a matte containing at
Potential Processing Routes for Recovery of Platinum Group
2017-11-6 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
Potential Processing Routes for Recovery of Platinum
pared with the pristine PGM ore sample, showing evidence of alteration. Also, the high contents, in oxidized PGM ores, of nat- bined leaching/flotation process for the beneficiation of
A conceptual flowsheet for heap leaching of platinum
2017-6-19 times, a conceptual flowsheet was proposed for a possible process route to recover PGM values circumventing the problematic smelter route for this material. Keywords: PGMs, heap leaching, low-grade ore concentrate, cyanide, thermophiles, bioleaching 1. Introduction
Assessing a two-stage heap leaching process for Platreef
2017-5-18 a mill-float-mill-float (MF2) recovery process on Platreef ore as a proxy material. Samples for the leaching tests, size analysis, mineral analysis and PGM and BM solid assays were obtained using a 2-way riffle splitter and various size rotary splitters, from
RECYCLING OF PLATINUM GROUP METALS FROM
2012-9-6 The most common technique is the leaching of the individual PGMs. As these metals show a very noble character, their resistance to dissolution is quite high. Consequently, strong acids in combination with oxidants are required in the leaching process. These conditions lead to the formation of soluble PGM complexes.
An investigation of cyanide-based heap leaching for
2020-12-15 process, in terms of Pt leaching from sperrylite, through further work on a pure mineral sample. The key focus was on finding a suitable oxidant that can be used in cyanide solutions, from among air, oxygen and ferricyanide, to facilitate the dissolution.
Recovery of Platinum, Palladium, and Gold From Stillwater
recovery of platinum, palladium, and gold from stillwater complex flot ation concentrate by a roasting·leaching procedure by e. g. bdglin, 1 j. m. gomes, 2 t. g. carnahan,2and j. m. snider3 abstract
Effect of PGM Mineralogy on PLATSOL® Leachibility
PGM ore for which the full values of its PGM content could not be realised using conventional techniques. The PLATSOL ® process was developed in 2000 by International PGM Technologies at SGS Lakefield, to maximise the revenues from the ore by leaching, in a single step, the base (Cu, Ni, Co) and precious (Pt, Pd, Au) metals in a bulk concentrate.
A conceptual flowsheet for heap leaching of platinum
2017-6-19 times, a conceptual flowsheet was proposed for a possible process route to recover PGM values circumventing the problematic smelter route for this material. Keywords: PGMs, heap leaching, low-grade ore concentrate, cyanide, thermophiles, bioleaching 1. Introduction
Leaching and the Residue Flotation of a Low-Grade Ni-Cu
According to the mineralogy of a low-grade Ni-Cu-PGM sulfide ore, a leaching-flotation process was introduced to process the ore. The leaching tests were focused on temperature, acid concentration, and grinding fineness under normal pressure. Results show that most of Mg and Fe can be effectively leached by 25% H2SO4 with a small amount of copper and nickel loss in leaching solution.
OVERVIEW OF PGM PROCESSING
2015-1-12 PGM Concentrated Residues Tailings Purchased Concentrate Concentrate Furnace Matte Smelting Ore Anglo Converting Process (at Rustenburg) Our configuration differs from our competitors we have a broad footprint across all 3 Bushveld limbs. Consequently, our integrated production system is more complex (i.e.13
(PDF) A conceptual flowsheet for heap leaching of
Cyanidation, which is commonly applied to extract Au and Ag, may also be used for leaching PGM [7, 8]. For example, Panda et al demonstrated column bioleaching allowed to extract 52% Cu, 95% Ni
RECYCLING OF PLATINUM GROUP METALS FROM
2012-9-6 The most common technique is the leaching of the individual PGMs. As these metals show a very noble character, their resistance to dissolution is quite high. Consequently, strong acids in combination with oxidants are required in the leaching process. These conditions lead to the formation of soluble PGM complexes.
An investigation of cyanide-based heap leaching for
2020-12-15 process, in terms of Pt leaching from sperrylite, through further work on a pure mineral sample. The key focus was on finding a suitable oxidant that can be used in cyanide solutions, from among air, oxygen and ferricyanide, to facilitate the dissolution.
Blacksand2gold
2020-5-8 The leaching process has not yet been optimized for recovery of PGM's, but it is expected that PGM's will pass through the leaching operation and be recovered with the base metals. This problem is difficult to resolve because testing for PGM's is sophisticated and is not readily available to the small scale miner, therefore, most miners
Leaching and solvent extraction purification of zinc from
2021-1-15 An integrated hydrometallurgical process was used for the zinc leaching and purification from a zinc ore containing 9.75 wt% zinc. The zinc minerals in the ore were hemimorphite, willemite, and
cayanide leaching process step by step supplier
Carbon in leaching process also be called CIL plant. In this production line, use cyanide leading and carbon absorbing technology to get gold. CIL plant consists of following steps: 1 The ore is first reduced in size (typically 80% passing 200mesh ) to ensure that all
