pgm leaching process technique

pgm leaching process technique

(PDF) Direct leach approaches to Platinum Group Metal (PGM ...

International PGM Technologies, to recover platinum group metals, gold and base metals such as Cu, Ni and Co from a variety of high and low-grade ores, concentrates,

Atmospheric leach process of high-chromitite PGM-bearing ...

Leach tests were conducted in either a single-stage or a two-stage process and the results are compared and contrasted. 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

Effect of PGM Mineralogy on PLATSOL® Leachibility

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. NorthMet bulk flotation concentrate assayed ~15%

Direct leach approaches to Platinum Group Metal (PGM) ores ...

Jul 01, 2015  The Platsol® is a single step pressure leaching process developed at SGS (formerly Société Générale de Surveillance) by International PGM Technologies, to recover platinum group metals, gold and base metals such as Cu, Ni and Co from a variety of high and low-grade ores, concentrates, mattes, auto-catalysts and other industrial products (Fleming, 2002).

(PDF) Potential Processing Routes for Recovery of Platinum ...

Direct leaching of oxidic PGM ore using different acids yielded relatively low PGM extractions. Leaching in hydrochloric acid achieved extractions of 36.6% Pt and 8.8% Pd, nitric acid achieved ...

RECYCLING OF PLATINUM GROUP METALS FROM

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

OVERVIEW OF PGM PROCESSING - Anglo American Platinum

Platinum Group Metals (PGMs) are recovered through underground and open pit mining from poly-metallic sulphide ores containing PGMs, Nickel, Copper and other metals: • Platinum (Pt), Palladium (Pd), Rhodium (Rh) and Ruthenium (Ru) are the most prevalent of the six PGMs, with Iridium (Ir), and Osmium (Os) found in much smaller quantities

Extraction of Platinum Group Metals IntechOpen

Oct 02, 2017  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 to smelting of PGM

PGM Extraction Hydrocaronyl Processes

The kinetics and mechanism of the reaction of CO with solutions of chloride complexes of pgms have been discussed in detail (4–7).In particular, Equation (ix) was studied. (NH 4) 2 [PtCl 6] was isolated from a solution of chloride complexes upon leaching of industrial concentrate of pgms in the hydrochloric acid + dichlorine (HCl + Cl 2) system and contained 41.45% Pt and 0.65% Pd.

CN1650036A - Process for extracting platinum group metals ...

PGMs can be extracted from a source material by heat-treating the source material to form a residue containing PGMs in a cyanide leachable condition and, thereafter, cyanide leaching the resudue...

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.

RECYCLING OF PLATINUM GROUP METALS FROM

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

WO2003087416A1 - Process for extracting platinum group ...

PGMs can be extracted from a source material by heat-treating the source material to form a residue containing PGMs in a cyanide leachable condition and, thereafter, cyanide leaching the resudue using a solution containing cyanide to form a pregnant cyanide leach liquor containing PGMs in solution.

Ammonia Leaching as a Pre-Treatment for the Processing of ...

metal and PGM recoveries were monitored in order to determine the effect of the treatment. Due to the low extraction of base metals, less than 10%, the ammonia column treatment was unsuccessful at dissolving the oxidation layer and hence had only modest impact on the flotation process, with an indication that leaching treatment

PGM Refining Catalytic Converter Recycling

LEACHING AND REFINING. The last part of the catalytic converter recycling is refining. At the end of this section, we can see the metals in our hands. As a result of this process, we can reach platinum, palladium and rhodium. In these processes, if different acids are used in only correct proportions, the process result is achieved.

Extraction of Platinum Group Metals IntechOpen

Oct 02, 2017  Pressure oxidation leach is a typical hydrometallurgical process used to separate base metals from the PGM residue. The base metals are leached, while the PGMs remain in the residue. The PGM residue is sent to a precious metal refinery where various solution extraction and precipitation methods are used to separate individual metals [ 1 ].

CN1650036A - Process for extracting platinum group metals ...

PGMs can be extracted from a source material by heat-treating the source material to form a residue containing PGMs in a cyanide leachable condition and, thereafter, cyanide leaching the resudue using a solution containing cyanide to form a pregnant cyanide leach liquor containing PGMs in solution.

Process development for elemental recovery from PGM ...

• PGM tailings represent untapped secondary metal and mineral resources. • Major elements were extracted from PGM mine tailings. • Extraction was achieved via thermochemical treatment followed by aqueous leaching. • The process used ammonium sulphate, a low-cost, recyclable chemical agent.

Recovery of PGM's from Spent Autocatalyst Using ...

Effects of ultrasound agitation on the efficiency of solvent extraction was also evaluated in this work.Results of aqua regia leaching experiments have shown that the quantity of dissolved PGM¡¦s increased as the solid-to-liquid ratio decreased. The maximum dissolved quantity of PGM¡¦s could be obtained by a 3-hr leaching time.

PLATIRUS PGM Recycling

R. Rumpold and J. Antrekowitsch, ‘Recycling of Platinum Group Metals from Automotive Catalysts by an Acidic Leaching Process’, Fifth International Platinum Conference: A Catalyst for Change, Sun City, South Africa, 17th–21st September, 2012, The Southern African Institute of Mining and Metallurgy, Johannesburg, South Africa, 2012, pp. 695 ...

Leaching of Pt, Pd and Rh from Automotive Catalyst Residue ...

After 10h leaching, about 99% of PGM was dissolved. In the case of automotive catalyst recycling, the presence of Pt, Pd, Rh and other supporting oxides makes the leaching process more complex. Several studies had been made to leach PGM from new or spent automotive catalyst with higher extraction efficiency. Leaching of Pt and Rh from

Recovery of platinum group metals from oxide ores—TML Process

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.

Pyrometallurgical upgrading of PGM-rich leach residues ...

The production of Platinum Group Metals (PGM) normally entails the smelting of PGM flotation concentrates, converting of the furnace matte and removal of the bulk of the Ni, Cu, Co, S and Fe through atmospheric and pressure leaching in a base metals refinery to produce a PGM-rich concentrate.

Gold extraction - Wikipedia

Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of small gold nuggets and flakes. Placer mining techniques since the mid to late 20th century have generally only been the practice of artisan miners. Hydraulic mining was used widely in the Californian gold rush, and involved ...

Pyrometallurgical upgrading of PGM-rich leach residues ...

The production of Platinum Group Metals (PGM) normally entails the smelting of PGM flotation concentrates, converting of the furnace matte and removal of the bulk of the Ni, Cu, Co, S and Fe through atmospheric and pressure leaching in a base metals refinery to produce a PGM-rich concentrate.

Selective Recovery of Platinum Group Metals from Spent ...

Selective Recovery of Platinum Group Metals from Spent Automotive Catalysts by Leaching and Solvent Extraction ... When the technique is applied to PGM recy-cling, the metals contained in the scrap are dissolved in a ... Before the leaching process, so that the PGMs could be readily dissolved in acidic solution, the catalyst was mechan- ...

PGM Refining Catalytic Converter Recycling

LEACHING AND REFINING. The last part of the catalytic converter recycling is refining. At the end of this section, we can see the metals in our hands. As a result of this process, we can reach platinum, palladium and rhodium. In these processes, if different acids are used in only correct proportions, the process result is achieved.

CN1650036A - Process for extracting platinum group metals ...

PGMs can be extracted from a source material by heat-treating the source material to form a residue containing PGMs in a cyanide leachable condition and, thereafter, cyanide leaching the resudue using a solution containing cyanide to form a pregnant cyanide leach liquor containing PGMs in solution.

Process development for elemental recovery from PGM ...

• PGM tailings represent untapped secondary metal and mineral resources. • Major elements were extracted from PGM mine tailings. • Extraction was achieved via thermochemical treatment followed by aqueous leaching. • The process used ammonium sulphate, a low-cost, recyclable chemical agent.

Recovery of PGM's from Spent Autocatalyst Using ...

Effects of ultrasound agitation on the efficiency of solvent extraction was also evaluated in this work.Results of aqua regia leaching experiments have shown that the quantity of dissolved PGM¡¦s increased as the solid-to-liquid ratio decreased. The maximum dissolved quantity of PGM¡¦s could be obtained by a 3-hr leaching time.

Recovery of Platinum, Palladium, and Gold From Stillwater ...

platinum-group metals (PGM) and gold from Stillwater Complex flotation concentrate. The Stillwater Complex is the only major U.S. PGM re­ source. Development of a suitable extraction technique will contribute to its exploitation. The concentrate was roasted at 1,050° C to convert

Pgm refining Johnson Matthey

Chemical separation is a highly complex multistage process that converts the five pgms into their final product forms, commonly a pgm sponge. It involves dissolution and a series of solvent extractions, evaporation, precipitation and filtration steps to produce highly pure salts for each pgm.

Tailored High Performance Low-PGM Alloy

10) Acid leaching process was modified.Go. 2nd stage scale up: M 8-9. 11) The 2. nd. stage scale up (5 g / batch) was successful. 12) Acid leaching process . was established. M 10: 13) The 2. nd stage scale up is reproducible. Go. M 11-12: 14) MEA performance; New IP application; Sample send out; Manuscript submitted. Task 5 Accomplishments ...

Recovery of platinum group metals from oxide ores—TML Process

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.

Gold extraction - Wikipedia

Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of small gold nuggets and flakes. Placer mining techniques since the mid to late 20th century have generally only been the practice of artisan miners. Hydraulic mining was used widely in the Californian gold rush, and involved ...

Learn About the Heap Leaching Process Mining Techniques

Jan 10, 2019  Leaching process Ore initial processing. In heap leach mining the ore is prepared according to its starting particle size, and is... Leaching solution composition distribution. Leaching solutions (or lixiviants) used in heap leach mining are either...

Assessing a two-stage heap leaching process for Platreef ...

1 Assessing a two-stage heap leaching process for Platreef flotation concentrate James M. †Mwase†1, Jochen Petersen , Jacques J. Eksteenβ † Centre for Bioprocess Engineering, Department of Chemical Engineering, University of Cape Town, Rondebosch, South Africa β Department of Metallurgical Engineering, Western Australia School of Mines, Curtin University, GPO

Leaching (chemistry) - Wikipedia

Leaching is the process of a solute becoming detached or extracted from its carrier substance by way of a solvent.. Leaching is a naturally occurring process which scientists have adapted for a variety of applications with a variety of methods. Specific extraction methods depend on the soluble characteristics relative to the sorbent material such as concentration, distribution, nature, and size.