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.

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.

Major Mines & Projects | McArthur River / Key Lake Mine

The high pressure autoclave secondary leaching circuit is on stand-by as the current ore is amenable to leaching at atmospheric pressure. Sulphuric acid, steam and oxygen are injected into the leach vessels to promote uranium extraction. The CCD circuit consists of eight thickeners in series. The slurry flow is counter current to the wash water.

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 …

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 ...

HYDROMETALLURGY | 9 Cobalt processing options …

r overflow advances to a high-grade copper SX circuit. The thickener underflow is fed to a counter-current decantation (CCD) train to wash out entrained copper and cobalt values …

Towards Solving the Complexity Associated with …

The solid liquid separation process through repeated stages of dilution and gravity sedimentation is termed as continu-ous countercurrent decantation (CCD) system. In CCD system …

SEPARATION HIGH-TECH AND EFFICIENCY FOR COPPER/COBALT PRODUCTION

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.

Overview of the main processing routes for cobalt extraction …

The ore is first leached at high pressure and temperature in an autoclave and then undergoes neutralisation and solid-liquid separation through counter current decantation (CCD).

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 ...

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 ...

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

Processing of copper electrorefining anode slime: a review

Anode slime is the insoluble product deposited at the bottom of the electrorefining tank during electrorefining of copper. It generally contains Cu, Ni, Se, Te, Ag, Au, platinum group metals (PGM), Pb, Ba, Fe, etc. Owing to the presence of valuable metals and metalloids in the anode slime, numerous approaches have been made by the researchers to extract them …

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 ...

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 ...

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

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. In the first stage of the investigation, the influential factors on copper leaching, such as the amount of acid consumed (200–400 g/kg of ore), the initial iron concentration of the raffinate (5 ...

counter current decantation copper ore – Grinding Mill China

Aug 23, 1977 · A counter current decantation system for the fluid separation … of sulfuric acid whereby the copper in the ore is leached into the solution and … » More detailed Soluble metal recovery improvement using high density thickeners …

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 …

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.

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 ...

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.

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 …

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

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 ...

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 ...

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.

Exploration, Mining, Milling and Processing of Uranium

2.1.1.3 Exploration for Uranium Ore Deposits. Exploration of uranium anomalies in the early days consisted of the most direct approach such as geological favorability involving places of known uranium minerals and hydrothermal mineralization, especially the existence of pathfinder elements like copper and lead, along with searches in favorable rocks such as granitoids and …

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 …