Productscanada patents for gold leaching reagents

BF Flotation Cell

BF flotation cell has two types: type I and type II. Type I is improved as suction cell referring to model SF; type II is improved as direct flow cell referring to model JJF.

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Cyclone Unit

Each feeding inlet of Xinhai cyclone unit is installed knife gate valve independently developed by Xinhai. This valve with small dimension reduces the diameter of cyclone unit.

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Hydraulic Cone Crusher

The supports at both ends of cone crusher main shaft, scientific design of crushing chamber, double insurance control of hydraulic and lubricating system.

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Overflow Type Ball Mill

Wet type overflow ball mill is lined with Xinhai wear-resistant rubber sheet with excellent wear resistance, long service life and convenient maintenance

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Grid Type Ball Mill

Wet type grid ball mill is lined with Xinhai wear-resistant rubber sheet with excellent wear resistance design, long service life and convenient maintenance.

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Round Vibrating Screen(YA)

Ring groove rivets connection, plate type screen box, advanced structure, strong and durable Vibration exciter with eccentric shaft and eccentric block, high screening efficiency, large capacity

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Jaw Crusher

Xinhai improves the traditional specification of crushing chamber by adopting high speed swing jaw and cambered jaw plate.

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Hammer Crusher

High-speed hammer impacts materials to crush materials. There are two ways of crushing (Wet and dry)

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Jig

The cone slide valve is adopted; the failure rate is reduced by 80%; low energy consumption;the separation of different material, improvement of the processing capacity by more than 35%.

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Energy Saving Ball Mill

Cylindrical energy saving grid ball mill is lined grooved ring plate which increases the contact surface of ball and ore and strengthens the grinding.

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Cylinder Energy-Saving Overflow Ball Mill

20-30%. Rolling bearings replace slipping bearings to reduce friction; easy to start; energy saving 20-30%

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SF Flotation Cell

Both sides of the impeller with back rake blades ensures double circulating of slurry inside the flotation tank. Forward type tank, small dead end, fast foam movement

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Patents - Process Research Ortech Inc.

The following patents and process innovations have been carried out at Ortech and by 2, 2548225, A PROCESS FOR THE RECOVERY OF VALUE METALS FROM 9, 2289967, METHODS FOR SEPARATION OF TITANIUM FROM ORE OF BASE METALS AND CYANIDE FROM GOLD-BARREN CIP SOLUTIONS.

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YES TECHNOLOGIES: Cyanide-free biocatalyzed leaching of gold

Gold. Description: Process which uses microorganisms for the recovery of precious metals and efficacy on par with cyanidation, with a concurrent reduction in chemical reagent costs of about 80 percent. Canadian Patent Application No.

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WO2013023297A1 - Process of leaching precious metals - Google

Of Canada As Represented By The Minister Of Natural Resources Canada; Priority date A traditional way of extracting gold from crushed ores has involved leaching A number of methods have been attempted to overcome the problems of the processes that do not need ammonia, e.g. the process of U.S. Patent No.

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US5250272A - Process for leaching precious - Google Patents

A process for leaching gold and silver from ores and ore concentrates is The procedure of the Canadian Patent 1,221,842 is for leaching for instance gold and . and reliable process control, it is necessary that the reagents, among which in

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HM X-leach - MineworX - Mineworx Technologies

Cyanide has been the leach reagent of choice in gold mining because of its high gold The patent-pending cyanide-free reagent consists of a base formula of

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Technologies EnviroLeach Technologies Inc.

The patent-pending EnviroLeach formula consists of simply combining five Cyanide has been the leach reagent of choice in gold mining because of its high gold BC, Canada involved the preparation, leaching and assaying of numerous

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PDF STUDY OF GOLD LEACHING WITH BROMINE AND

Jul 31, 2018 reagent. The reactivity of pure pyrite, arsenopyrite and chalcopyrite minerals was brominebromide leaching, gold dissolution rate, sulphide minerals, copper Published by the Canadian Institute of Mining, Metallurgy and Petroleum In 1942, Fink et al. patented the in-situ production of bromide or its

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Iberian Develops New Enviro-Friendly Alternative to Cyanide

Jul 26, 2016 the United States Patent and Trademark Office USPTO for its HM X-leach, As gold cyanidation rates are relatively slow, the industry has been searching through a number of well-known and proven extraction methods including; Iberian Minerals is a Canadian junior mining company positioned for

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Non-toxic leaching formula developed for e-scrap - E-Scrap News

Aug 11, 2016 British Columbia, Canada-based Mineworx said its HM X leach formula removes gold, Iberian recently announced it filed for a patent from the U.S. Patent Some leaching reagents, including cyanide, are poisonous and

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cyanide-free process for gold extraction - 911 Metallurgist

Thetford Mines, QC, Canada. 418-423- process for gold extraction without the short and long Patented process for precious metals Au & Ag extraction, using Closed-loop process with recycling of reagents and water, eliminating the.

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Using Nickel as a Catalyst in Ammonium Thiosulfate Leaching for

nickel was used as a catalyst to minimize the reagent consumption. On a 100 In 1887, cyanidation was patented by MacArthur and the. Forrester brothers Symposium on Gold Recovery, CIM, Montreal Quebec, Canada, May. 3–7, 1998

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hypochlorite leaching of gold ore - 911 Metallurgist

Kingston, Ontario, Canada K7L 3N6. ABSTRACT of impurities, gold extraction from an ore quantities of reagents. .. W., 1887, British Patent 14,174; 1888,.

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Thiourea Leaching of Gold - Imperial Spiral - Imperial College London

For over 100 years, cyanide has been the leach reagent of choice in gold mining because of its high gold recoveries, A chemical metallurgist, MacArthur was granted British Patent No. Canadian Metallurgical Quarterly 363: 149-155.

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US20140356225A1 - Method for pre-treatment of gold-bearing

Info: Patent citations 7; Non-patent citations 2; Legal events; Similar documents; Priority and Thiosulfate gold extraction from some oxide ores can be minimal. . Inexpensive air or more expensive oxygen gas are the only reagents consumed, thereby Owner name: BARRICK GOLD CORPORATION, CANADA.

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EnviroLeach and Mineworx Provide Year End Corporate Update

Jan 10, 2018 Cyanide has been the leach reagent of choice in gold mining because of its metals extraction process and patent-pending portable extraction technologies. of applicable Canadian and United States securities legislation.

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Thiosulphate Stability In Gold Leaching Process - Bibliothèque et

Canada. Yout fila Votre rélémce. Our file Noire refdnnce. The author has The current problem of thiosulphate gold leaching is the high reagent patented an ammonium thiosulphate leaching process for treating a copper bearing gold ore.

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Modern trends in gold processing — overview - ScienceDirect

Direct leaching of gold ores such as heap leaching, carbon in pulp CIP, carbon in leach of alternative leach reagents which could improve environmental concerns as . Canadian Mining Journal May 1967, pp. US Patent #4,557,795.

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Gold Extraction and Recovery Processes - Semantic Scholar

Various methods such as gravity concentration, flotation, panning, pyrometallurgy, cyanidation etc are available for Selected summary of patented gold recovery processes and examples of commercial mining and recovery the Canadian,.

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The bugs that boost leaching MINING.com

Jun 19, 2015 Bio-oxidation has also been used to treat sulphide containing gold ores before leaching of the gold using chemical reagents. This has

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the management of cyanide in gold extraction the - Squarespace

Cyanide is one of only a few chemical reagents that will dissolve gold in water. .. Patents formalized by McArthur and the Forrest brothers in 1887 and 1888 effec- .. oped by the Canadian mining company INCO and the H2O2 hydrogen

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A Review of Thiosulfate Leaching of Gold: Focus on - MDPI

Jun 15, 2017 Thiosulfate Consumption and Gold Recovery from. Pregnant low corrosivity of leach solution, cheap reagents, etc. [11–15]. U.S. Patent 4,070,182, 24 January 1978. 18. Grosse, A.C. . Canada, 3–6 May 1998. 41. Chen

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Gold cyanidation - Wikipedia

Gold cyanidation is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. It is the most commonly used leaching process for gold extraction. Production of reagents for mineral processing to recover gold, copper, zinc .. other metals in Gossan Creek: Murray Brook mine, New Brunswick, Canada"

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MEI Online - Hydrometallurgy: Latest News

Dundee Sustainable Technologies Cyanide-Free Gold Extraction Process Receives . Teck Cominco Granted Canadian Patent for the CESL Hydrometallurgical Nickel New Generation Solvent Extraction Reagents Jun.16, 2003.

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the promise of the patent in canada and around the world

E. Richard Gold. ** Canadian and British patent law, and one that possesses sound policy following explanation from Bennett J. in Unifloc Reagents Ltd. v. . the dye leaching out of the fabric when subjected to a process called “kier.

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glycine as a lixiviant for the leaching of low grade copper-gold ores

have been reported to selectively leach copper over gold from a copper .. Leaching Methods Applicable to Low Grade Ores . Philippines, Saudi Arabia, Canada, Argentina, USA, Indonesia, Peru, Mexico, Solutions: Google Patents.

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Patent Pending: The Future of Intellectual Property Rights in

Jun 27, 2018 The burgeoning marijuana industry is a gold rush for patent law firms around the country. Marijuana businesses are New methods of extraction and processing. Cannabis Intellectual Property in Canada. The same

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Gold processing Britannica.com

By ad 100, up to 40,000 slaves were employed in gold mining in Spain. With E.B. Millers process of refining impure gold with chlorine gas patented in Britain that concentration by methods such as those applied to alluvial gold is impossible. and most of the rest is divided among Russia, Canada, Australia, Brazil, and

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PREG-ROBBING OF GOLD IN CHLORIDE-BROMIDE SOLUTION

Jun 29, 2015 Abstract: One of the major issue in gold chloride leaching is a patented andor tested on a demonstration plant scale, such as Intec Moyes, 2002, carried out in chloride solutions at ambient pressure, high reagent concentrations and .. Gold Extraction, Presentation in World Mining Congress, Canada.

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A method for leaching or dissolving gold from ores or precious metal

The hydrometallurgical leaching of native gold from gold-bearing ores or the However, even if several other reagents are known to dissolve gold at the QC PQ H3A 2B2, Canada; e-mail [email protected] of Gold from a Precious Metal Bearing Sludge Concentrate, U.S. patent 4,670,052 2 June 1987.

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Bruner Gold Project – Canamex Gold Corp.

Bruner is Canamex´s flagship gold mine development project; Located in the prolific on patented claims; Oxide heap leach processing with 90% recovery of gold on single stage crushed material Low reagent consumption = low operating costs; Cyanide leachable gold property-wide. Vancouver BC V6C 3T7 Canada.

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A REVIEW OF GOLD LEACHING IN ACID THIOUREA SOLUTIONS

Since the initial report of thiourea as a complexing reagent for gold leaching, methods for gold recovery were employed until cyanidation was patented by and G. W. McDonald , Eds., Winnepeg : Canadian Institute of Mining and

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Extraction of copper and gold from anode slime of Sarcheshmeh

For gold extraction, anode slime was heated with aqua regia at 90°, and the gold then Different methods to extract valuable metals like gold exist, but hydrometallurgical methods are more affordable. . Canadian Metallurgical Quarterly, vol. Method for recovering gold by solvent extraction, US patent EP20110791989.

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Recovery of gold from solution by reduction-precipitation with

Jun 29, 1993 A process is disclosed for the direct recovery of gold from thiourea, thiocyanate or United States Patent 5223023 . of recovering gold from non-toxic reagents such as thiourea solution. Dietz, Jr. et al Canadian Patent No.

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METHODS FOR SELECTIVE LEACHING AND EXTRACTION OF

Oct 27, 2016 A method of leaching gold, palladium andor platinum from a . 62150,513 Filed: April 21 , 2015 and United States Provisional Patent Application No. Extractive Quebec, Quebec City, Canada, second edition, 1999.

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solvent impregnated resins for the recovery of gold from - DORAS

cyanidation or post treatment methods of recovering copper and cyanide from solution are . chalcopyrite concentrate from the Chibougamau mine in Canada. The . at the same time he patented cyanidation as an extraction technique.

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the increased activity in the development of thiosulfate based

CSIROs patented breakthrough in the elution of gold thiosulfate from strong .. As a result of recycling the leach solution after resin adsorption, the reagent cost for .. leaching of gold in thiosulfate solutions”, Treatment of gold ores, Canadian.

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Patenting Life: The Harvard Mouse that Has Not Roared The

Chakrabarty decision about a patent process as tortuous as the Canadian R.E.Gold, "Biomedical patents and ethics," McGill Law Journal, 45:413, 2000. 3.

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PATENTS IN GENOMICS AND HUMAN GENETICS - NCBI - NIH

Patents on methods and DNA sequences relevant to clinical genetic testing show less . Gold and Gallochat explained how the Directive became an important . In Australia, the United Kingdom, and especially Canada, where Myriad .. and at lower cost than previous methods that relied on extraction and purification of

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A Method for Leaching or Dissolving Gold from Ores or Precious

the well-known chemical inertness of the noble metal toward most acids and bases.3. Several reagents are known to leach native gold from gold-bearing ores. It.

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Technical Papers & Patents Hazen Research

Patents. 9,499,756 Roll press. 9,340,849 Systems and methods for metal recovery. 9,187,803 Systems and methods for improved metal recovery using

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