2 edition of Carbon-in-pulp silver adsoption from cyanide leach slurries of a silver ore found in the catalog.
Carbon-in-pulp silver adsoption from cyanide leach slurries of a silver ore
Stuart J. Hussey
Includes bibliographical references.
|Statement||by S. J. Hussey, H. B. Salisbury, and G. M. Potter.|
|Series||Report of investigations - Bureau of Mines ; 8268, Report of investigations (United States. Bureau of Mines) -- 8268.|
|Contributions||Salisbury, H. B., Potter, George M., United States. Bureau of Mines.|
|The Physical Object|
|Pagination||, ii, 22 p. :|
|Number of Pages||22|
The invention concerns the concentration or recovery of gold or silver from cyanide liquors containing either or both of them by contacting the liquors with activated carbon in order to load it with Au(CN) 2-or Ag(CN) 2-according to the particular isotherm, removing the loaded carbon and treating it with hydronium or metal cations or molecular complexes in order to convert the Au(CN) 2-and Ag The mill processes a free-milling gold ore utilizing a gravity recovery circuit and conventional cyanide leach/carbon-in-pulp circuits. Plant slurry temperature cycles seasonally and allows for a unique opportunity to measure the impact that temperature has on gold leach kinetics, carbon adsorption efficiency and cyanide destruction ://
USGoldAndSilverLeaching - b Bureau of Mines Information Circular/l Gold and Silver Leaching 百度首页 登录 加入VIP 享VIP专享文档下载特权 赠共享文档下载特权 w优质文档免费下载 赠百度阅读VIP精品版 立即开通 意见反馈 下载客户端 网页 The invention concerns the concentration or recovery of gold or silver from cyanide liquors containing either or both of them by contacting the liquors with activated carbon in order to load it with Au(CN).subsup.- or Ag(CN).subsup.- according to the particular isotherm, removing the loaded carbon and treating it with hydronium or metal cations or molecular complexes in order to convert › Justia.
carbonprior to adsorption of gold from cyanide solution (Rabb, ). The lackof a convenient methodfor stripping adsorbed gold and silver from loaded carbon handicapped the development of ClP practice. Without stripping, it was impossible to recycle carbon in a closed-circuitsystem (adsorption, stripping, and reactivation). These A process for adsorbing gold from a leach pulp by means of activated carbon is described in which the leach pulp (the leach solution together with the subdivided gold bearing ore) is diluted to a specific gravity of less than that of the activated carbon and is subsequently passed upwardly through a multistage liquid/solid contacting ://
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The Bureau of Mines investigated the applicability of carbon-in-pulp process for recovering silver from low-grade ores. The reasons for the research were to illustrate a practical procedure for the process design of carbon-in-pulp adsorption circuits using leach slurries and simple equipment, and to illustrate how equations of adsorption theory relating to rate data and equilibrium adsorption Carbon-in-pulp silver adsorption from cyanide leach slurries of a silver ore.
[Washington]: Dept. of the Interior, Bureau of Mines, (OCoLC) Online version: Hussey, Stuart J. Carbon-in-pulp silver adsorption from cyanide leach slurries of a silver ore. [Washington]: Dept. of the Interior, Bureau of Mines, (OCoLC) Minor silver in the ore reported in the carbon in amounts of up to oz/ton.
Gold adsorption rate data and an equilibrium adsorption curve for minus plus mesh carbon at ambient temperatures were developed and used in the successful application of a cascade design :// A countercurrent, carbon-in-pulp, pilot plant test was made for the adsorption and recovery of gold on minus 6- plus mesh coconut carbon from cyanide leach slurries of the jig tailing.
The ore was in two lots containing and oz/ton Au and was leached in cyanide solutions containing and pet NaCN, respectively, at pH Carbon adsorption of gold, silver, and mercury from leach pulps or solutions is usually 90 to pct; however, the addition of lb/st CaS to the slurry reduced mercury and silver adsorption to between 0 and 8 pct and 0 and 6 pct, respectively, with all ores except the high-silver-copper 5-M :// Carbon-in-pulp silver adsorption from cyanide leach slurries of a silver ore / ([Washington, D.C.]: Dept.
of the Interior, Bureau of Mines, ), by Stuart J. Hussey, George M. Potter, and H. Salisbury (page images at HathiTrust)?type=lcsubc&key=Cyanide process&c=x. The carbon is then removed by screening, across a carbon screen, allowing the liquid and finely ground ore ( mesh) to pass through easily, and retaining the carbon on the screen.
The carbon is then generally subjected to a heated solution ( deg to deg F) of (1%) sodium hydroxide and (%) cyanide and the gold is re-dissolved and Improving the process performance of gold cyanide leaching reactors 3 literature (Equation ) shows that k L a is a function of mixing power intensity (P/V) and superficial gas velocity v s.
The coefficients A, B, and C are reactor- and :// nature of the pulp a certain amount of degradation of carbon takes place within the adsorption section.
Carbon fines that are produced by abrasion pass through the inter-stage screens and move co-current with the pulp down the adsorption cascade. The barren pulp is screened at – mm to recover undersize carbon. Tailings are pumped to a In both processes the activated carbon is moved from one tank to another in countercurrent with the ore pulp until the recovery of the loaded carbon in the first tank.
This paper presents a dynamic model that describes, with minor changes, the carbon-in-leach, the carbon-in-pulp, and the gold leaching ?script=sci_arttext&pid=S The introduction of activated carbon to recover gold from cyanide leach solutions in the last quarter of the 20th century had a breakthrough impact on the economics of gold ore processing, as the world gold industry entered a period of unparalleled expansion following the deregulation of Carbon-in-pulp silver adsorption from cyanide leach slurries of a silver ore / In a typical gold processing plant, gold is extracted from ore using an aerated alkaline cyanide solution and recovered from the solution by activated carbon (AC) through carbon in pulp (CIP) or adsorption onto activated carbon, these effects include competing metal-cyanide complexes, preg-robbing and the mineralogy of the ore.
This thesis considers these areas from an experimental and modelling viewpoint. In this research it is shown that a variety of metal-cyanide species can be used to leach gold from certain refractory :// At a fixed cyanide concentration, the kinetics investigation of gold adsorption onto activated carbon was conducted at four initial glycine concentrations (1, 5, 10 and 15 g/L) in the presence of ppm copper and the results are presented in Fig.
1 and Table observations indicate that when copper is present, increasing free glycine concentration accelerates the gold adsorption rate sodium or potassium cyanide are brought into contact with an ore which may or may not have required extensive preparation prior to leaching. Gold and silver are dissolved by cyanide in solutions of high pH in the presence of oxygen.
There are three general methods of contacting ores with leach solutions: (1) heap leaching, (2) vat leaching, and (3) Carbon in leach (CIL) is an important step in gold processing that involves simultaneous adsorption and leaching. While the mechanism of leaching and adsorption are well known, the effect of CALCIUM SULFIDE PRECIPITATION OF MERCURY FROM GOLD~SILVER CYANIDE~LEACH SLURRIES By W.
Slmpson,1 W. Staker,1 and R. Sandberg2 ABSTRACT During cyanidation of mercury-bearing gold-silver ores, significant amounts of mercury are :// Calgon Carbon – GRC 6×12 – Granular Activated Carbons.
Calgon Carbon Type GRC Granular Carbons are coconut-based activated for gold recovery operations- In Carbon in Leach (CIL), Carbon in Pulp (CIP), and Heap for carbon that, in the past, was lost in the pre-attrition step and/ or process.»More Gold CIL (Carbon in Leach) Process is an efficient design of extracting and recovering gold from its ore.
By cyaniding and carbon leaching crushed gold ore slurry simultaneously, CIL process lower the gold mining operation cost and increase gold recovery rate to a degree of 99%.
HUSSEY S.J. SALIBURY H.B. AND POTTER G.M., "Carbon In Pulp Silver Adsorption From Cyanide Leach Slurries Of Silver Ore" Report of Investigations Bureau Of Mines United States – JOHN MARSDEN AND IAIN HOUSE, "The Chemistry of Gold Extraction", Great Britain –Cap.
6 – Pag. – Carbon-in-pulp silver adsorption from cyanide leach slurries of a silver ore / ([Washington, D.C.]: Dept. of the Interior, Bureau of Mines, ), by Stuart J. Hussey, George M. Potter, and H.
B. Salisbury (page images at HathiTrust)?type=lcsubc&key=Gold.Calcium Sulfide Precipitation of Mercury During Cyanide Leaching of Gold Ores By R. G. Sandberg, W. W. Simpson, When lb CaS per ton of ore was added to a leach slurry, mer three-stage carbon-in-pulp adsorption.
Gold, silver, and mercury analyses were accomplished using radioisotopes. The