Advanced study on the extraction of Nickel from its ores
270°C. Solid-liquid separation is carried out by Counter-Current Decantation (CCD). There are various ways of purifying the nickel-containing solution and separating nickel and cobalt. In modern plants, such separation is carried out by solvent extraction (SX). Final products produced are electro-nickel, nickel oxide or nickel briquettes.
Pumpi Copper-Cobalt Mine, Katanga, Democratic Republic …
The run-of-the-mine (ROM) ore will undergo coarse crushing, semi-automatic grinding, as well as ball milling-single stage and ball mill circuit (SABC) beneficiation, sulphuric acid leaching, counter current decantation (CCD) extraction, and electro winning processes for the production of cathode copper and cobalt hydroxide.
DESIGN OF COUNTER CURRENT DECANTATION IN …
The counter current decantation had been used since 90 years ago in the hydrometallurgical plant. It is currently adopted by all new hydrometallurgical plants located in the Katanga Province of ...
SEPARATION HIGH-TECH AND EFFICIENCY FOR COPPER/COBALT PRODUCTION
Counter Current Decantation
The process used for the washing of the copper leach solution from the copper ore is a Counter Current Decantation process with Thickeners supplied by FL Schimdth. CCD thickener …
Batu Hijau Copper-Gold Mine, Indonesia
The mine typically handles around 600,000t/d of ore and waste, the ore grading an average 0.49% copper and 0.39g/t gold. Following primary crushing, the ore is transported to the concentrator by an overland conveyor, 1.8m wide and 6.8km long. ... Counter-current decantation thickeners are used to dewater the concentrate to a slurry, which is ...
Current Trends in Countercurrent Decantation and Thickener Circuit
Continuous countercurrent decantation (CCD) washing is an important unit operation employed mostly in hydrometallurgical, mining, and chemical process industries.
Hidden Valley | Papua New Guinea | Open Pit | Harmony
Crushed ore is conveyed from the pit via a 5.5km overland pipe conveyor and treated at the Hidden Valley processing plant using a two-stage crushing circuit followed by a semi-autogenous grinding mill, gravity, counter current decantation/Merril Crowe circuit for silver and a carbon-in-leach circuit for gold.
Mine Details | MiningLink.au
It is primarily a copper mine that also produces uranium, gold and silver. ... Mine in Australia The Olympic Dam operation is a very large polymetallic undertaking with probable and proven copper ore reserves totalling 717 million tonnes, grading at 1.7 percent copper and 0.5 kilogram a tonne of uranium oxide. It is the largest known uranium ...
Mining Process | Konkola Copper Mines Plc
The smelter processes ore from Konkola, Nchanga and other third party concentrates and it has a capacity of 311,000t pa. The smelter has met global benchmark environmental performance as it captures 99.6% of sulphur emissions. The main refinery at Nkana uses electrolysis to process copper anodes to LME A grade copper cathodes.
High-tech and efficiency for copper/cobalt production
Unlike sulfide ore, the beneficiation of oxide ore involves acid leaching, where the copper is liberated by the addition of sulfuric acid. ... most cost-effective thickener solution incorporating the latest separation technology and knew that it had to include counter-current decantation (CCD). As the name implies, CCD works by sending water in ...
US4043760A
It is obvious from the description thus far that in the counter current technique used the fresh acid entering line 16 comes in contact with the ore containing the least amount of copper, whereas, the copper rich ore entering line 11 first comes in contact with the copper rich acid extractant. This is a well known principle of counter current ...
Recent Progress in Hydrometallurgical Processing of Nickel Lateritic Ore
MHP is one of the intermediate products of nickel laterite ore processing through the hydrometallurgical route. The solution after the leaching reaction is precipitated to separate solid–liquid parts through counter-current decantation. The pH is adjusted for leached liquor obtained to remove ions such as Fe +3, Al 3+, and Cr +3 as hydroxide ...
Towards Solving the Complexity Associated with Continuous
Continuous countercurrent decantation (CCD) washing is an important unit operation employed mostly in hydrometallurgical, mining, and chemical process industries. In many of the hydrometallurgical processes CCD system is used in combination with leaching circuit. It is observed that while obtaining the number of CCD stages, water and material …
Developing of a Counter-Current Copper Leaching Process …
A method for reusing hydrometallurgical raffinate in the leaching of low-grade oxide copper ore in a counter-current leaching process was evaluated.
Counter Current Decantation
Counter-current decantation (CCD) and counter-current washing (CCW) circuits can be significantly more efficient and cost-effective with the right technology and process optimisation. We have over 130 years of experience providing solutions for liquid-solid separation.
SEPARATION RECOVERY OF HIGHLY CLARIFIED LIQUID
decantation (CCD) plants, the new and improved ANDRITZ inter-stage mixing and dilution system for CCD circuits helps to reduce the footprint and consequently cut CAPEX while …
Hydro–pyro integration in the processing of nickel laterites
Solid–liquid separation is carried out by Counter-Current Decantation (CCD). There are various ways of purifying the nickel containing solution and separating nickel and cobalt. In modern plants such separation is carried out by solvent extraction (SX). Final products produced are electro-nickel, nickel oxide or nickel briquettes.
HYDROMETALLURGY | 9 Cobalt processing options …
Copper and cobalt are usually simultaneously dissolved from the oxide ores using acid and SO 2 (added as sodium metabisulphite, SMBS) for reduction of Co(III) minerals. The downstream thickener overflow advances to a high-grade copper SX circuit. The thickener underflow is fed to a counter-current decantation (CCD) train to wash out
Research Portal
2012 ALTA Nickel/Cobalt/Copper Conference (Perth, Western Australia, 26/05/2012 - 02/06/2012) 2012. ... Counter current decantation (CCD) of this material is challenging at best, with large CCD tanks having a large plant footprint and requiring high capital investment. ... Depending on the composition of the original ore and the method of ...
Design and Operation of the Kupol Project Counter …
Design and Operation of the Kupol Project Counter-Current Decantation Circuit Using Deep Cone Thickeners F. brunn et al. Figure 1 Kupol location map with shipping routes to port of Pevek 3 Testing and sizing Testing of about ten different ore samples was conducted over a period of about one year. Variations in pH
Counter Current Decantation Cyanide Gold Leaching
The Process Flowsheet CCD CY-1 shows (below) the continuous counter-current decantation system, in which all the ore is first reduced to a very fine state in the grinding mill-classifier circuit, in a cyanide solution.The slime overflow of the classifier, usually 70%—200 mesh, or finer, is sent to the first thickener, known as the primary thickener.
The HPAL Process
Autoclave discharge is fed to a solid/liquid separation step. Counter-current decantation is employed in most plants. It usually involves six to seven stages of thickeners. The majority of HPAL plants burn elemental sulfur to produce sulfuric acid and the by-product steam is utilized in various unit operations.
Continuous Countercurrent Decantation Calculations
equation method, for 100 tons per day of $10 ore, plus (400 )< 0.02) with the conditions assumed as below (fig. 1). 5. lOOZ plus 1002 = lOOY, Conditions Assunled plus 100 tons of water (value $0.00) ... calculatiilg countercurrent decantation circuits in the chemical ~ndustry, for example causticizing flowsheets, the manufacture of alum from ...
Microsoft Word
Copper at the Ruashi II plant is leached into solution in Stirred tanks. Leach solution (pregnant liquor) is then recovered in a counter-current-decantation (CCD) circuit. Cu is extracted from the pregnant liquor using solvent extraction (SX). The loaded strip liquor from the SX plant is fed to the electrowinning circuit to produce Cu cathodes.
Characterisation of Parameters Influencing the Phase …
Solvent extraction (SX) is one of the most widely applied hydrometallurgical processes in copper production from oxide ore. As the high-grade ore deposits have been developed and depleted, now only low-grade ore deposits are being developed and are therefore facing obstacles of extreme processing conditions. This results in leaching gangue minerals …
Flowsheets & Flowcharts
Copper Ore Extraction. Aerial view of the Opemiska Copper Mines (Quebec) Ltd., Mill Buildings and Shaft Area. ... CY-1 This leach plant shows the continuous counter-current decantation system, in which all the ore is first reduced to a very fine state in the grinding mill-classifier circuit, in a Gold Leaching solution. The slime overflow of ...
High-Rate Thickener for Gold Counter Current Decantation …
High-rate Thickener for Gold Counter Current Decantation Circuit (CCD Process) Working Principle Generally this type of thickener has double or triple thickening chambers arranged vertically, it seems like two or three thickeners are piled together. The double-deck thickener is an example to show the working principle.
Towards Solving the Complexity Associated with …
solution can be generated from very lean ore. Keywords Continuous counter current decantation (CCD) · Leaching circuit · Solute concentrations · Solid– liquid separation * Anil Kumar Tripathy bapun.tripathy@gmail 1 Hydro and Electrometallurgy Department, CSIR- Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
Towards Solving the Complexity Associated with Continuous
The solid liquid separation process through repeated stages of dilution and gravity sedimentation is termed as continuous countercurrent decantation (CCD) system. In CCD …
MANUAL FOR URANIUM ORE PROCESSING
laboratory ore testing, to show the specific role of these tests in the development of a project, and to provide practical instructions for performing the tests and for inter- ... 8.2. Batch counter-current extraction tests 91 8.2.1. Extraction 91 8.2.2. Stripping of uranium from loaded solvent 94 8.3. Continuous extraction tests 94 8.3.1 ...