hydrometallurgy chlorination leaching of refractory ores

  • Home
  • /
  • PRODUCT
  • /hydrometallurgy chlorination leaching of refractory ores

Chlorination Leaching of Refractory Ores - Hydrometallurgy ...

Chlorination leaching of floatation concentrate could be a route for treatment of refractory ores instead of roasting, BIOB or POX - some companies are also testing fine grinding and oxygen injection using shear reactors in alkaline cyanide systems. Direct leaching of ores becomes very expensive using chlorine systems.

Research on chlorination leaching of pressure-oxidized ...

Jun 01, 2020 · As a result, the optimum conditions of the chlorination leaching for the refractory gold concentrate pretreated by pressure oxidation are as follows: 4 of pH, above 1.0 V of the redox potential, 75 g/L of the NaCl concentration, 40 °C of the reaction temperature, 3:1 of the liquid-solid ratio and 2 h of the leaching time.

hydrometallurgy chlorination leaching of refractory ores

Chlorination Leaching of Refractory Ores - Hydrometallurgy ... To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Hydrometallurgy. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).

Kinetics of leaching refractory gold ores by ultrasonic ...

Jun 02, 2012 · 高达10%返现 · The resources of refractory gold ores are abundant, and their effective treatment can bring good economic benefits. This paper investigated the kinetics of leaching gold from refractory gold ores by ultrasonic-assisted electro-chlorination. The effects of ultrasound time ratio, initial hydrochloric acid concentration and leaching temperature on the kinetic parameters were

HYDROMETALLURGY OF GOLD: NEW PERSPECTIVES AND

Refractory gold ores Refractory ores are characterized by low recoveries and high reagent consumption when subjected to direct leaching and several attempts have been done to process efficiently those raw materials. In the last few years with the depletion of high grade and free-milling ores and with the development of economic and feasible pre-

The recovery of gold from refractory ores by the use of ...

高达10%返现 · Recently, the U.S. Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores, comparing various treatment methods in which a ground ore pulp is contacted with chlorine gas and activated carbon is added to the pulp for a carbon-in-chlorine leach (CICL). The objective of this research was to demonstrate the basic feasibility of CICL

Electro-hydrometallurgical chloride process for selective ...

Chloride leaching has been explored as one of the most promising development-stage cyanide-free processes due to its capability of leaching refractory ores without pre-treatment (e.g. pressure oxidation or roasting), enhanced gold dissolution kinetics compared to cyanidation and facile oxidant regeneration via air sparging , .

Kinetics of leaching refractory gold ores by ultrasonic ...

Jun 02, 2012 · The resources of refractory gold ores are abundant, and their effective treatment can bring good economic benefits. This paper investigated the kinetics of leaching gold from refractory gold ores by ultrasonic-assisted electro-chlorination. The effects of ultrasound time ratio, initial hydrochloric acid concentration and leaching temperature on the kinetic parameters were discussed. It is ...

Electro-Hydrometallurgical Chloride Process For Selective ...

The leaching results of different types of gold ores including oxide, sulfide, carbonaceous and refractory ores/concentrates and the fundamentals relevant to the oxidation of pure gold are summarised.

The recovery of gold from refractory ores by the use of ...

Recently, the U.S. Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores, comparing various treatment methods in which a ground ore pulp is contacted with chlorine gas and activated carbon is added to the pulp for a carbon-in-chlorine leach (CICL). The objective of this research was to demonstrate the basic feasibility of CICL technology ...

Gold Leaching from a Refractory Gold Concentrate by the ...

In this research, NaCl — NaClO solution is used to leaching gold from a refractory gold concentrate, and the influence of NaCl and NaClO concentration, reaction time to the leaching rate were investigated in this experiment. The raw materials and the leaching residue were characterized by a series of analysis methods such as XRD, XRF, SEM and ...

Refractory Gold Ore Treatment Methods

Jul 14, 2016 · Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and

Leaching characteristics of copper refractory ore in ...

Nov 01, 2011 · Refractory copper ores (CROs) in central Africa contain copper minerals that are locked up in a micacious solid matrix or associated with carbonate, sulfide and phosphate minerals. Several researchers have reported that the recovery of copper from CRO material by an acid-leaching process is not economically feasible, due to the presence of excess gangue-acid-consuming minerals such as

(PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE |

LEACHING OF A ROASTED COPPER SULFIDE ORE Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY ABSTRACT Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition.

Refractory Gold Technology

Refractory Gold Technology Sherritt’s Refractory Gold Technology is used to recover gold from refractory sulphide feedstocks. Many gold ores and concentrates contain fine grained gold locked within sulphide minerals, such as pyrite and/or arsenopyrite, unavailable for recovery by conventional leaching

Silver Metal Extraction from Refractory Silver Ore Using ...

Jan 28, 2021 · Alp I, Celep O, Paktunc D, Thibault Y (2014) Influence of potassium hydroxide pretreatment on the extraction of gold and silver from a refractory ore. Hydrometallurgy 146:64–71. Article Google Scholar 3. Altiner M, Yildirim M, Yilmaz T (2015) Leaching of Mersin/Aydincik dolomite ore in hydrochloric acid. Dissolution rates.

Hydrometallurgy & Recycling Group – Hydrometallurgy ...

Hydrometallurgy & Recycling Group. Our duty is to respond the recycling and mineral processing sectors by developing process flowsheet and process optimization. We have a solid background both in primary resources processing and secondary resources recycling. In area of urban waste management and recycling we worked on spent printed boards ...

GOLD RECOVERY OF REFRACTORY SULFIDE CONCENTRATES

Cyanide leaching of the concentrate was performed at 20%-w/w of solid (500 gram of refractory sulfide gold ore concentrate) in a 2.5-liter glass reactor with aeration and stirred at 250 rpm. Leach solutions were prepared using deionized-distilled water at the prescribed concentration of reagents.

Efficient Synchronous Extraction of Nickel, Copper, and ...

Jun 18, 2020 · Improving gold recovery from a refractory ore via Na 2 SO 4 assisted roasting and alkaline Na 2 S leaching. Hydrometallurgy 185 , 133–141 (2019). CAS Article Google Scholar

文献高级检索结果 - x-mol

The dielectric properties and thermostable characteristics of 15 rare earth oxides are systematically investigated in microwave fields. Results indicate that the Pr6O11 of the light and Tb4O7 of the heavy rare earth oxides show excellent responsiveness to microwaves, both start to surge after 500 °C, with dielectric constant values of 10.814 and 10.157 (F/M) at 800 °C, respectively, meaning ...

Electro-hydrometallurgical chloride process for selective ...

Chloride leaching has been explored as one of the most promising development-stage cyanide-free processes due to its capability of leaching refractory ores without pre-treatment (e.g. pressure oxidation or roasting), enhanced gold dissolution kinetics compared to cyanidation and facile oxidant regeneration via air sparging , .

Electro-Hydrometallurgical Chloride Process For Selective ...

The leaching results of different types of gold ores including oxide, sulfide, carbonaceous and refractory ores/concentrates and the fundamentals relevant to the oxidation of pure gold are summarised.

US4559209A - Leaching refractory gold ores - Google Patents

A method is disclosed for leaching a gold ore which is refractory due to the presence of sulphide minerals of arsenic and antimony. The ground ore is leached with cyanide in a pipe reactor at a pressure of between 5 and 8 MPa. The terminal pH value of the pulp is controlled to be 10 or less than 10.

Processing Refractory Gold - Hydrometallurgy: Leaching in ...

Refractory ores are normally have either a high sulfide content that masks the gold preventing cyanide leaching of the gold, or high organic content that also block gold leaching (reabsorbs the gold), or it can have a high clay content that also soaks up the cyanide.

(PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE |

LEACHING OF A ROASTED COPPER SULFIDE ORE Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY ABSTRACT Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition.

Pretreatment Process on Refractory Gold Ores with As

Beijing General Research Institute of Mining and Metallurgy has studied a refractory gold ore bearing high arsenic in Guizhou. It used water chlorination to leach gold and gold leaching rate reached 91.48%. 17) High cost of chlorides and serious corrosion of equipment are the key factors to restrict the application of wet chlorination. 3.4.

Hydrochloric Acid in Hydrometallurgy - Bepress

Gold has usually been extracted from its ores by cyanide solution. Refractory gold ores are usually treated by different methods, e.g., bacteria, pressure leaching, roasting, etc., to liberate the gold then leach it by cyanide solution. It was found that when refractory gold ores

(PDF) Gold recovery of refractory sulfide concentrates ...

hydrometallurgical pre-treatment process has given more option for treating refractory ores. Keywords: refractory gold ore, ... of hydrometallurgy process is one of ... chlorine leaching of gold ...

Silver Metal Extraction from Refractory Silver Ore Using ...

Jan 28, 2021 · Alp I, Celep O, Paktunc D, Thibault Y (2014) Influence of potassium hydroxide pretreatment on the extraction of gold and silver from a refractory ore. Hydrometallurgy 146:64–71. Article Google Scholar 3. Altiner M, Yildirim M, Yilmaz T (2015) Leaching of Mersin/Aydincik dolomite ore in hydrochloric acid. Dissolution rates.

2019 | Waters - CGIS

Leach) facility, Moa Nickel in Cuba, started production in 1959 and has ore and processing capability to operate well into the middle of the 21st century. If we accept that the most modern and challenging varieties of pressure hydrometallurgy started with the oxidation of gold refractory ores

Chloride–hypochlorite oxidation and leaching of refractory ...

SABA M., YOUSEFI A.M., RASHCHI F., MOGHADDAM J., 2011, Diagnostic pre-treatment proce-dure for simultaneous cyanide leaching of gold and silver from a refractory gold/silver ore, Minerals Engineering 24,

Supercritical Water Treatment of Refractory Gold Ores

Nov 06, 2017 · Bureau researchers attempted to apply this ore dissolution chemistry as a method to improve metal recoveries from complex or refractory ores. Pyrite is known to inhibit gold leaching (Nicol, 1987); supercritical water pretreatment was tried as a method of improving gold recovery from auriferous pyrite ore while yielding innocuous sulfur as a ...

(PDF) A short history of hydrometallurgy | Rubens Felipe ...

20 F. Habashi / Hydrometallurgy 79 (2005) 15–22 Pyrrhotitic Make up nickel ore H2SO4 Sulfide SO2 concentrate Roasting O2 Leaching Reduction NH4OH + (NH4)2CO3 Filtration Air Gangue, S, PbSO4 FeOOH Leaching Purification Filtration Spent Electrolysis electrolyte Drying