a fundamental evaluation of the atmospheric pre-leaching section of ...
Nickel-Copper sulphide ores are the most important Platinum Group Metal bearing ores. The South African deposits are exceptionally rich in the platinum group metals (PGMs) and production of the PGMs is the primary purpose of treating these ores. The methods used in the recovery of the PGMs from the nickel-copper...Read More
Mining Heap Leach Mining Copper SX/EW Mining Process Plants ...
Overview. The Majuba Coal Terrace Handling System consisted of a system of 28 inplant conveyors and two under silo belt feeders. The two under silo belt feeders and associated mass flow hoppers withdrew a wide variety of coal from the two 100,000 tonne storage silos and conveyed the coal up into the boiler house at...Read More
Sources of Copper Ore | Copper Development Association of South ...
Oxide ores are readily leached by sulfuric acid, usually using a heap leach or dump leach process in combination with solvent extraction and electrowinning technology (SX-EW). Commonly sulfuric acid is used as a leach for copper oxide, although it is possible to use water. There have been examples where froth flotation...Read More
Copper recovery using leach/solvent extraction ... - SAIMM
Improvements in copper L/SX/EW technology. Solvent extraction reagents. The first improvement in copper SX reagents came when LIX. △. 446. NOVEMBER/DECEMBER 2002. The Journal of The South African Institute of Mining and Metallurgy. Figure 1— Conceptual leach/solvent extraction/electrowinning flow sheet...Read More
Lessons learnt from heap leaching operations in South ... - SAIMM
The Journal of The South African Institute of Mining and Metallurgy. JANUARY/FEBRUARY 2003. Introduction. In recent years, production of extremely pure copper from solvent extraction and electro- winning (SX/EW) of solutions obtained from leached oxide and sulphide ores has gained popularity as an efficient recovery...Read More
The chemistry of the nickel-copper matte leach and its application to ...
The chemistry of the nickel-copper matte leach and its application to process control and optimisation. Z. Hofirek and D.G.E. Kerfoot b. ~Rustenburg Base Metals Refiners, Rustenburg, South Africa. bSherritt Technologies, Fort Saskatchewan, Alta., Canada. (Revised version accepted February 5, 1992 ). ABSTRACT. Hofirek...Read More
Optimization of Microbial Leaching of Base Metals from a South ...
X-ray diffraction analysis revealed that pentlandite and chalcopyrite were the prominent mineral phases in a South African sulfidic nickel ore concentrate that hosted nickel and copper. Cobalt was found to be closely associated with the nickel-bearing pentlandite phase of the ore sample. Microbial batch leaching.Read More
Parametric Effects on Leaching Behavior of Nickel-Copper Matte in ...
May 24, 2013 ... Leaching Behavior of Nickel-Copper Matte in Ammonia, Particulate Science and Technology: An International Journal, 31:4,. 319-325. To link to this article: ... 2Department of Civil and Chemical Engineering, College of Science, Engineering and Technology University of South Africa,. Johannesburg, South...Read More
Hydrometallurgical Approach for Leaching of Metals from Copper ...
Jan 8, 2018 ... In order to improve the circular economy of metals, selective leaching of copper from ... Keywords: base metal production; intermediate; nickel iron oxide; fayalite; cuprite; leaching. 1. ...... International Conference on Molten Slags Fluxes and Salts, Cape Town, South Africa, 25–28 January 2004; pp. 543–550...Read More
Acid-Gangue Interactions in Heap Leach Operations: A ... - MDPI
Deshenthree Chetty. Mineralogy Division, Mintek, Private Bag X3015, Randburg 2125, South Africa; firstname.lastname@example.org. Received: 14 November 2017; Accepted: 25 January 2018; Published: 29 January 2018. Abstract: Heap leaching accounts for a fifth of global copper production, sourced primarily from porphyry ores...Read More
Heap Leaching and Heap Bioleaching - MINTEK | MINTEK
Mintek has developed considerable experience in heap leaching and heap bioleaching, and has undertaken an advanced research programme investigating the high-temperature heap bioleaching of low-grade chalcopyrite. This has culminated in the design, commissioning and operation of the copper heap bioleaching...Read More
US6277341B1 - Process for the rapid leaching of chalcopyrite in the ...
Leach Test No. 1 (Comparative). FIG. 1 shows the results of a batch bioleach test using a South African copper-zinc sulphide flotation concentrate and in which no active control over the process variables was exercised in order to control the surface potential of the chalcopyrite. The concentrate assayed 28% copper, 33%...Read More
LEACHING OF A Cu-Co ORE FROM CONGO USING ... - doiSerbia
peroxide, the maximum extraction of copper and cobalt were found to be ~80% and ~15%, respectively when the acid concentration was ... Keywords: Cu-Co ores; Leaching; Sulphuric acid; Hydrogen peroxide; Shrinking-core model; Stabcal modeling ..... oxide ores, in: Proc. of Third South African Conference on Base...Read More
Base metals heap leaching applications and process parameters
The Southern African Institute of Mining and Metallurgy The Fourth Southern African Conference on. Base Metals. Petrus J. van ... Mintek, 200 Hans Strijdom Drive, Randburg, South Africa. ABSTRACT. The heap ... Acid soluble oxide ore: of which the heap leaching of oxide copper ore with mild sulphuric acid solution is the...Read More
Extraction of Tin and Copper by Acid Leaching of PCBs
Feb 2, 2013 ... Many developing countries including India face the problem of hazardous e-waste generation with serious consequences for the environment and public health. According to the UN research in China and South Africa, e-waste from old computers may rise by 200 to 400 % from 2007 levels and by 500 % in...Read More
Novel redesign of a pressure leach autoclave by a South African ...
Novel redesign of a pressure leach autoclave by a South African platinum producer. ... extraction of copper and any remaining base metals from the first stage leach solid residue material. Leaching is performed in an autoclave operating at a ... platinum, african, south, autoclave, pressure, producer, leach, novel, redesign.Read More
Electrochemical Aspects of Leaching Copper from Chalcopyrite in ...
National Institute for Metallurgy, Randburg, South Africa. Abstract. Electrochemical aspects of semiconductors are used to interpret well established observations on the kinetics of leaching of chalcopyrite. The oxidation of this n-type semiconductor is dominated by a surface film which is thermally unstable and breaks down...Read More
Outotec completes the acquisition of Biomin BIOX® technology in ...
Nov 23, 2015 ... Outotec completes the acquisition of Biomin BIOX® technology in South Africa. Outotec has successfully completed the acquisition of the majority of the shares in Biomin South Africa Pty. Ltd. and certain assets from Biomin Technologies S.A. in Switzerland. Outotec got the full intellectual property and...Read More
Bioleaching technology in minerals processing
Private Bag X3015, Randburg, 2125, South Africa. Bioleaching is a process that employs micro- organisms to dissolve (leach) sulphide minerals. It finds application in the extraction of metals from their ores. Although bioleaching was used unknowingly by the ancients to extract metals (principally copper) from ores, the...Read More
Extractive Metallurgy of Copper - 5th Edition - Elsevier
This multi-author new edition revises and updates the classic reference by William G. Davenport et al (winner of, among other awards, the 2003 AIME Mineral Industry Educator of the Year Award "for inspiring students in the pursuit of clarity"), providing fully updated coverage of the copper production process, encompassing...Read More
biological generation of sulphuric acid for bioleaching of copper ...
copper oxide ore and elemental sulphur were suspended in an acid solution bearing acidophilic microorganism ... leaching processes, in particular by leaching oxide copper ores with sulphuric acid and subsequent .... KORDOSKY G.A., The Journal of The South African Institute of Mining and Metallurgy, Copper recovery...Read More
Copper: Technology and Competitiveness (Part 7 of 15)
A copper ore deposit is a localized zone in the earth's crust that contains copper-bearing min- erals in unusually large quantities. On average, the continental crust contains about 0.0058 per- cent copper, or 58 parts per million. A deposit of copper-bearing minerals is classed as an ore reserve if there are sufficient quantities...Read More
Microbial Leaching (Bioleaching, Biomining) - Environmental ...
Microbial leaching of copper has been widely used in the USA. Australia, Canada, Mexico, South Africa and Japan. In the USA 200 tonnes of copper is recovered per day. Uranium Leaching Uranium leaching is more important than copper, although less amount of uranium is obtained than copper. For getting one tonne of...Read More
Copper SX-EW – What are the options? | MINING.com
Feb 28, 2017 ... This was the traditional route to cathode copper for high copper solutions from vat leaching and roast leaching operations prior to the advent of SX. ... New systems include Resin in Slower Settling Solids (RIS)(4) developed by WINRIS, South Africa, and Resin in Moisturised Mix (RIMM)(5) by InnovEco,...Read More
Performance Chemicals for Enhanced Oil ... - BASF Corporation
recovery of copper from leach solutions. Leaching copper from oxide ores, low grade secondary sulfide ores, and primary sulfide concentrates with aqueous acid .... BASF CHILE S.A.. Av. Carrascal Nº 3851. Quinta Normal. Santiago. Chile. Phone: +56 2 2640 7000. Fax: +56 2 775 3095. Africa. BASF South Africa (Pty) Ltd.Read More
Quantitative Monitoring of Microbial Species during Bioleaching of a ...
Dec 20, 2016 ... Stirred tank bioreactors for the leaching of copper concentrate, housing a consortium of acidophilic, moderately thermophilic bacteria, relevant in several bioleaching operations, served as a model system. The microbial community analysis via qPCR allowed a precise monitoring of the evolution of total...Read More
Leaching of Wood Preservative Components and Their Mobility in ...
crossfield pits of pine was noted, and a portion of the copper appeared to migrate to the surface of the larger blocks. Sig- nificant CCA leaching and copper movement was also noted in 6- by 6- by 20-in. (50- by 50- by 500-mm) CCA-treated. Pinus patula stakes exposed off the coast of South Africa for. 2 years (Shelver and...Read More
Heap Leaching - 911 Metallurgist
Aug 20, 2017 ... Other very large gold districts – notably the pre-cambrian shield areas of Canada, Australia and South Africa – show relatively few heap leaches. ... The recovery of copper by leaching from relatively low grade ores containing both oxidized, and sulphide minerals is rapidly gaining in commercial importance.Read More
Copper and cyanide recovery from barren leach solution - BQE Water
Oct 20, 2014 ... Base metals such as copper compete for the cyanide reagent used to extract gold, necessitating the need to .... cyanide leach to suppress copper leaching (Hunt, 1901; Muir et al, 1995; Drok & Ritchie, 2000); this option has only seen ..... South African Institute of Mining and Metallurgy, Johannesburg, pp.Read More
Precious Metal Heap Leach Design and Practice - Ore-Max
leach recovered aluminum (actually alum) for use in the cloth dying industry. Copper heap and dump leaches in southern Spain were common by about 1700. Gold and silver heap leaching ... cambrian shield areas of Canada, Australia and South Africa - show relatively few heap leaches. There are several reasons for this...Read More
heap leaching of platinum group metals from a low-grade ore ... - ORBi
Apr 16, 2001 ... 2. Process Division, Western Platinum Limited, Private Bag X508, Marikana, 0284, Republic of South Africa; ... Keywords: PGMs, heap leaching, low-grade ore concentrate, cyanide, thermophiles, bioleaching. 1. ... the copper and gold industry, where heap and dump leaching have found wide spread use in.Read More
Sherritt International - Operations - Commercial and Technologies ...
This process is highly versatile and has been integrated with acid and ammoniacal leaching flowsheets for the treatment of nickel-copper mattes and for the ... Implats, Springs Refinery (South Africa); Norilsk Nickel, Harjavalta Refinery (Finland); BHP Billiton, Kwinana Operations (Australia); Minara Resources, Murrin Murrin...Read More
BHP Billiton | BHP Billiton Closes San Manuel Copper Mine
BHP Billiton Base Metals recently announced the immediate closure of its in situ copper leaching operations at San Manuel, Arizona, as part of its international copper resource management strategy. The closure of these operations will result in a production cut of 9 000 tons per annum of copper cathode. (The closure was...Read More
Your Clean TeQ Representative in Africa - Multotec
Resin-in-Leach. U-Column. Concentration. Desorption. cLX. Continuous. Liquid Extraction. CIF®. Dealkalisation and Target. Species Removal. DeSALx® ... Resin. Metals Recovery. Recovering. Gold. Silver. Vanadium. Platinum. Palladium. Scandium. Nickel. Copper. Rare Earth. Elements. Recovering. Zinc. Cobalt.Read More
Leaching of Chromium, Copper, and Arsenic from CCA-Treated ...
Nov 26, 2014 ... In South Africa, CCA is still commonly used and local food vendors in Cape Town are even cooking food over fires fueled with CCA-treated wood . Slightly different formulations of CCA (CCA-A, CCA-B, and CCA-C) exist but CCA-C containing 18.5% CuO (copper oxide), 47.5% CrO3 (chromium oxide or...Read More
'Zimbabwe should harness biomining' | The Chronicle
Apr 10, 2017 ... “Biomining is already in use in several countries, including South Africa, Brazil and Australia. It's now estimated ... Copper dump and heap-leaching applications have been used mainly in South America while globally; there has been agitated tank bioleaching of refractory gold concentrates. “More recently...Read More
THE NABABEEP NEAR WEST TUNGSTEN MINE, SOUTH AFRICA ...
SOUTH AFRICA. P. G. Sonr.rct, O'okiep Copper Company, Ltd., IVababeep, South AJrica. ABSTRACT. A number of ferberite-wolframite deposits in the Namaqualand copper district are restricted to several bands of sedimentary schist separated by paragneiss. These Archaean formations are intruded by Pre-Cambrian...Read More
Mineral bio-processing: an option for recovering strategic ... - prometia
Leaching of copper ores in. “precipitation ponds”. 1960s. U.S.A.. Copper dump leaching. (Kennecott Corporation). 1960s-1990s. Ontario, Canada. In situ mining of uranium. 1980-1996. Lo Aguirre, Chile. Bioheap leaching of copper. (with SX/EW). 1986-. Fairview, South Africa. Bioprocessing of gold ore concentrate.Read More
Real and Potential Metallurgical Benefits of HPGR in Hard ... - CEEC
shown that HPGR comminution resulted in improved gold leaching even at considerably coarser particle size distributions ... rate improvements were demonstrated in column leaching of South African gold ores also in 1988. Randol ... gravity recovery as well as improved and faster heap leach gold and copper recoveries.Read More
SCRAP METAL FACT SHEET. - South African Waste Information ...
All South. Africans can play a significant role in reporting illegal dumping and recycling scrap metal. Recycled scrap metals can be ferrous or non-ferrous. Ferrous metals and ... leach toxic chemicals from oil, petrol, diesel, battery acid, coolants and transmission and ... South Africa followed by copper at 23%. SCRAP METAL...Read More