The CIL (Carbon in Leach) circuit is an intermediate stage in the production of gold. The process involves dissolving the solid gold particles into solution using a process know as cyanidation. The dissolved gold in solution is adsorbed onto activated carbon.
The remaining 'barren' slurry reports to the tails thickener and is pumped to the tails dam. The CIL circuit consists of two separate trains of tanks, with seven tanks in each train. In conventional CIL circuits, leaching takes place in the presence of carbon and therefore leaching and adsorption occur simultaneously.
• Method: flotation, regrind, CIL of concentrate and Float tails; • Equipment: 2 x SK1200 and 10 x OK200TC (flotation), Vertimill (VTM1000WB), 2 x 355kW SMDs, 4,000m3, Pre-Ox, 2 x 4,000m3 and 6 x 1,000m3 CIL tanks; FTL 7 * tank leach circuit with Kemix inter-stage screens and SMBS Cyanide destruct tanks;
CIL. Copper concentrate is stockpiled and sold to a smelter for further processing. In recent times, as the depth of the pit has increased the copper head grade has also increased, to the point where the ore was becoming uneconomical to treat. In addition, it was desirable to reduce the amount of cyanide reporting to the tails dam
3. Carbon-In-Leach (CIL): The carbon-in-leach process integrates leaching and carbon-in-pulp into a single unit process operation. Leach tanks are fitted with carbon retention screens and the CIP tanks are eliminated. Carbon is added in leach so that the gold is adsorbed onto carbon almost as soon as it is dissolved by the cyanide solution.
Gold Leaching( carbon in leach) process is widely used in the newly built gold leaching plants in recent years, and a lot of plants are changing into CIL as well.Gold Leaching CIL process is suitable for the treatment of oxidized gold ore with low sulfur content and mud content. It is unsuitable for the gold ore with high-grade silver.
Results of the bulk float show that 96% of the gold can be recovered into a concentrate mass of 9.2% by weight, assaying 41.8g/tAu. Stage 2: Bio-Leach Amenability Test The BAT test is a standard laboratory test devised to determine the amenability of a high arsenic concentrate to bio-leach technology.
Provided here are all major equipment for a plant arranged to recover gravity gold, float a gold rich sulphide concentrate, liberate the sulphide hosted gold with a light regrind and dissolved its precious metals using the Carbon-in-Leach process. The CIL process with activated carbon is best suited for ores with no or some levels of preg ...
An exceptional problem exists in CIL/CIP circuits since the residence time in the leaching/adsorption tankage may be ∼20 h and the tails from any period are derived from material entering the circuit an average of 20 h or so earlier and thus do not relate to the head from the same sampling period.
The leach circuit contains five leach tanks (CIL). From the copper flotation, the copper tails are pumped to the leach feed thickener to thicken the slurry to at least 50% solids before pumping it into the first leach tank for the cyanidation process (to dissolve the gold).
The product from the concentrate leach circuit is processed by resin in pulp for uranium recovery, followed by neutralization, cyanidation and carbon in pulp for gold recovery.The rougher float tails may be further treated to recover gold that was not recovered in flotation, but which had been liberated from the old dumps by natural oxidation ...
Float cellsold gravity leach float build big float tank daf float tank process description float cell laundry mineral processing flash float prices hybrid flot flotation cells siemens isolation float tank with epson salts purchase a float tank in south ontact supplier gold gravity leach float. ... Concentrate Cil Float Tails Leach ...
With CIL, leaching and adsorption start at the same time in the first tank; hence the solution grade doesn't get really high. If there is no reason to have a CIL, like preg robbing etc, you can achieve higher loading by using the first tank as a leach tank, followed by 6 stages of CIL.
Approximately 10 kg of four CIL tailings (iden tified as Tail-17, Tail-19, Tail-22, and Tail-25, taken September 17, 19, 22, and 25, respectively, in 20 16) were sampled from the metallurgical circuit
Leach ("CIL") cyanide leach of the gravity tails. The second was a whole ore cyanide leach and the third was a whole ore CIL. The fourth flowsheet involved a flotation separation (rougher and cleaner) followed by a separate cyanide leach of the flotation concentrate. Gold recoveries from the first three flowsheets were similar. Using
residue and CIL residue). This paper discusses the deportment characterization methodology by presenting results from investigations on samples from flotation (feed, concentrate, scavenger/rougher tail samples) and leach circuits (feed, POX/CIL residue and CIL residue). These samples represent the key streams for a typical
Carbon in Leach (CIL) process is widely used in the mining industry and in particular, it is an integral step of gold processing in gold extraction. Normally the CIL process can concentrate gold from 2.5–3.5 g/t in ore to 2000 to 6000 g/t on carbon.
Fast-payback reactivation of carbon from a flotation tails CIL circuit 339 the leach slurry, notably flotation reagents. If the carbon is not adequately reactivated after stripping, gold recovery can be reduced in the subsequent loading cycle, re sulting in higher gold values in the solution tails.
Intensive cyanidation4 of a gravity concentrate typically gives leach recoveries of 90 % to over 98%. The aggressive leach conditions with high cyanide and oxidant levels are easily able to treat coarse particles and complex ores that under standard CIP/CIL conditions would give extremely poor leach performance.
A sample of magnetic cleaner concentrate of roaster calcine-CIL tails containing 12.4 g/t gold, 33.8% iron (Fe) (typically in the form of iron oxides), and 3.4% carbonate (CO 3), was subjected to gold recovery by carbon-in-leach. Carbon-in-leach was conducted at 30% solids, 1 g/L sodium cyanide (NaCN) at pH 10.5 at ambient temperature for 6 hours.
The RIP tails are then treated by flotation to recover a rougher pyrite concentrate, and flotation tailings that are discarded. The rougher concentrate is cleaned to produce a final pyrite concentrate and cleaner scavenger tailings, and the pyrite concentrate is oxidized in an autoclave to leach uranium and generate acid. The
The float concentrate is transported to the Fairview BIOX® section for further processing, while the tails are subjected to the New Consort carbonin-leach (CIL) circuit. The loaded carbon from the CIL section is transported to Fairview for elution (and electro-winning). The total capacity of the New Consort metallurgical plant is 8ktpm.
The discovery of the significance of heat on leach recoveries, triggered extensive testwork on a range of leach feed and tails samples. Pilot plant testing demonstrated that 'heated leaching' of the CIL tails was the best process with an average recovery increase of 7·5% being achieved.
The present study was done according to an original methodology that aims to explore, for the first time, the CIL gold loss in oxidized leach tails. It allows to understand the leaching behavior of a double refractory ore using a synergistic approach including mineralogical characterization, diagnostic leach tests, and preg-robbing tests.
circuit, which are amenable to leaching. The CIL process involves: tailings from the copper rougher float being subjected to bulk sulphide flotation; and the bulk sulphide concentrate being combined with the copper cleaner tails, thickened and leached by CIL to recover gold and silver. The carbon is treated
At which time GMA also operated a 600ktpa oxide ore CIL plant configured to handle 270ktpa of sulphide ( i.e. Youanmi Deeps) feed through a bacterial oxidation plant (Bachtech technology). ... Concentrate and Float Combined Tail Leach Gold Extracted (g/t) 3.14 3.67 4.87 5.03 5.1 8.53 Gold in Tail (g/t) 1.97 1.36 0.23 4.00 3.27 0.40
"High quality activated carbon is essential in the recovery of gold in Carbon-in-Leach (CIL), Carbon-in-Pulp (CIP), and Carbon-in-Column (CIC) circuits. Goldcorp's Campbell complex at Red Lake Gold Mines (RLGM) experienced a period of low soluble gold (Au) recoveries during Q3 2013, during which time the processing plant saw higher than ...
The concentrate is pumped to cleaner cells for upgrading and is then filtered into a dry concentrate cake. Gold Leaching The leaching circuit comprises of one leach tank and six Carbon-in-Leach (CIL) tanks. From the copper flotation, the copper tails are conditioned with lime before it is pumped to the leach feed thickener.
AusIMM - Metallurgical Plant Design and Operating Strategies, Perth, September 2004 _____ _____ _____ GRINDING & GRAVITY CYCLONE SCAVENGER FLOTATION FINAL TAIL FALCON ROUGHER TAILS DAM IPJ1500 TAILS DAM CLEANER DETOX TAIL CRUSHING IPJ1000 FEEDER MILL FEED BALL MILL CONCENTRATE LEACH SYSTEM REACTOR …
"The Telfer processing plant commissioned its pyrite regrind and flotation circuit in August 2012. The circuit was designed to regrind pyrite concentrate to a p80 of <30µm then float a gold and copper rich concentrate before tails from the flotation circuit fed the carbon-in-leach (CIL) circuit downstream.
my problem is we don't have tailing and concentrate at same time, we feed solid gold to the leach tank, i can calculate how much gold i have leached, this does not include the amount of gold lose in solution form . now i am using this formula (total gold to tail= solid gold +solution gold) once i found the total gold, i converted it to gram/ton (total tail gold/total milled ore per day ...
C concentrate c grade in concentration E0 standard reduction potential F feed ... LGRT gold in total LG tails MBC Mercaptobenzothiolates ... process and gold is recovered on carbon in leach (CIL) process. Gold is recovered from the loaded carbon and later precipitated by electrolysis. Finally, doré bars are casted.