Zinc Silicate and Carbonate Leaching Process Outotec

Outotec174; Zinc Silicate and Carbonate Leaching Process Achieve efficient zinc recovery from ores that are not suitable for conventional processing. A significant part of the world's zinc reserves are in the form of zinc carbonate, often containing zinc silicate.

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CaF2 Enhanced HCI Leaching of a Manganese Bearing

CaF, ENHANCED HCI LEACHING OF A MANGANESE BEARING SILICATE ORE By P. ~omlaa,' K. P. V. ~ei,* and T. G. carnahan3 ABSTRACT The U.S. Bureau of Mines investigated a hydrochloric (HC1) calcium fluoride (CaF,) leaching procedure to treat domestic manganese (Mn) bearing silicate

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Ultrasound intensified Leaching of Gold from a Refractory Ore

sound increased remarkably the leaching ratio of gold when the pretreated ore was subjected to ultra sound leaching. The results showed that the appropriate acoustic power was a requirement during the ultrasound intensified leaching. The leaching ratio of gold increased with an increasing of NaCN concentra tion from 6 to 18 kg/t.

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Pressure acid leaching of zinc silicate ore ResearchGate

Download Citation on ResearchGate Pressure acid leaching of zinc silicate ore In this paper zinc silicate ore was treated by method of pressure leaching in sulfuric acid medium, by which zinc

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HCl Hydrochloric Leaching of Manganese Silicate Ore

Countercurrent Leaching. Countercurrent leaching was conducted to utilize excess leach acid and improve Mn extractions and to recover and recycle the fluoride that had been added to enhance leaching. The manganese silicate ore was leached countercurrently in a procedure schematically illustrated in

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Hydrometallurgical treatment of zinc silicate ore from

Hydrometallurgical treatment of zinc silicate ore from Thailand Hydrometallurgical treatment of zinc silicate ore from Thailand Bodas, M.G. 1996 01 01 000000 In recent years much emphasis has been placed on the leaching of zinc silicate ores by sulphuric acid, because these are the next best source for zinc after sulphide ores. An attempt has been made to assess the suitability of sulphuric

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Kinetics of sulfuric acid leaching of low grade zinc

The results of a leaching kinetics study of low grade zinc silicate ore with sulfuric acid are presented. Effect of ore particle size, reaction temperature, and acid concentration on

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Pressure leaching of zinc silicate ore in sulfuric acid medium

Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size, sulfuric acid concentration, pressure, reaction time and temperature on the extraction

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Column Bioleaching of a Low Grade Silicate Ore of Uranium

The bioleaching of a low grade Indian uraninite ore (triuranium octoxide, U 3 O 8 0.024%), containing ferro silicate and magnetite as the major phases, and hematite and

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Characterization and Flotation of Sulfur from Chalcopyrite

The chalcopyrite leaching residue used in this study was produced from a chalcopyrite concentrate leaching similar to the leaching circuit of the Cuprex process [9]. The leaching conditions are two stage countercurrent leaching with 6 hours of retention time on each stage, leaching temperature of 95oC, and 2.0 moles per liter of ferric chloride. The copper

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US20040074340A1 Method for the precipation of silica in

The invention relates to a method for the leaching of oxidized ores and in particular zinc ores. The ore, wherein the valuable metals are at least partially in silicate form, are routed to an acidic leaching stage in conditions where the silicate decomposes and the valuable metal ion comes into the solution. During leaching the silicate ion first dissolves, but simultaneously decomposes and is

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Bioleaching of silicate manganese ores Geomicrobiology

Jan 28, 20090183;32;Organic acids excreted by microorganisms dissolve manganese from silicate ores. Oxalic acid is more effective than citric, gluconic, and glycolic acid. Eighteen percent of the manganese in manganese silicate ore from Razoare, Romania, was dissolved within 6 days. Improvement of leaching conditions increased this to 20% within 6 h. Besides the manganese in the ore, 45% of the aluminum

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Welcome to CDC stacks CaF enhanced HCl leaching of a

A process flowsheet was developed that incorporated hcl caf2 leaching, excess leach acid utilization, fluoride (f) recycle, and mn recovery. When the domestic manganese silicate ore was processed, 98 pct of the mn was extracted, 99 pct of the caf2 was reclaimed, and a leach residue was produced that passed the Environmental Protection Agency

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CaF enhanced HCl leaching of a manganese bearing silicate

Note Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

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The kinetics of zinc silicate leaching in sodium hydroxide

As the leaching kinetics in alkaline medium is far less studied than in acid solutions, the purpose of the present work is to assessthe leaching kineticsparametersof a zinc silicate ore in sodium hydroxide. 2. Materials and methods The zinc silicate concentrate contains 3439% Zn (Table 1).

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Caf2 enhanced Hcl Leaching of a Manganese Bearing Silicate

Caf2 enhanced Hcl Leaching of a Manganese Bearing Silicate Ore. When the domestic manganese silicate ore was processed, 98 pct of the mn was extracted, 99 pct of the caf2 was reclaimed, and a leach residue was produced that passed the Environmental Protection Agency (EPA) extraction procedure (ep) test for nonhazardous waste. NTIS Accession No.

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Leaching of rare earths elements (REE) past and present

leaching technologies, both past and present, used in primary REE production. Bastnaesite Bastnaesite is a rare earth fluorocarbonate mineral1, RE(CO3)F, which primarily contains light rare earth elements. After physical upgrading, bastnaesite ore concentrates contain between 40 to 60% REE2.

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Lateritic nickel ore deposits

Limonite type laterites (or oxide type) are highly enriched in iron due to very strong leaching of magnesium and silica. They consist largely of goethite and contain 1 2% nickel incorporated in goethite. Absence of the limonite zone in the ore deposits is due to erosion. Silicate type (or saprolite type) nickel ore formed beneath the limonite

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Sulfuric acid leaching of zinc silicate ore under pressure

The obtained results show that the acid leaching of zinc silicate ore under pressure was found to be more efficient compared to other zinc hydrometallurgical process in terms of decreased dissolution of silica and iron and increased zinc extraction.

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Extraction method of nickel and cobalt from silicate

In the leaching of silicate Nickel cobalt ores particularly undesirable in the final solutions, complicating and drastically reducing the extraction of Nickel and cobalt ions are Fe 3+ and Al 3+. In the method prototype for maximum deposition in the ore body, the ore pile or from production solutions pH is maintained within the range of 2.5 4.0

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WO2002072896A1 A method for the precipitation of silica

The invention relates to a method for the leaching of oxidized ores and in particular zinc ores. The ore, wherein the valuable metals are at least partially in silicate form, are routed to an acidic leaching stage in conditions where the silicate decomposes and the valuable metal ion comes into the solution. During leaching the silicate ion first dissolves, but simultaneously decomposes and is

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Kinetics of Pressure Acid Leaching of Zinc from Zinc

The present work is concerned with the kinetic study of pressure leaching of zinc silicate ore in sulfuric acid solutions. The effects of leaching temperature, particle size, sulfuric acid concentration and agitation speed on the zinc extraction were evaluated. The results obtained show that the zinc extraction increases with increasing sulfuric acid concentration and leaching temperature.

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The kinetics of zinc silicate leaching in sodium hydroxide

12.1 kJ/mol and 66.8177;9.2 kJ/mol, for the high and low iron silicate, respectively). As the leaching kinetics in alkaline medium is far less studied than in acid solutions, the purpose of the present work is to assessthe leaching kineticsparametersof a zinc silicate ore in

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Kinetics of Sulfuric Acid Leaching of Low Grade Zinc

The results of a leaching kinetics study of low grade zinc silicate ore with sulfuric acid are presented. Effect of ore particle size, reaction temperature, and acid concentration on zinc

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(PDF) The kinetics of zinc silicate leaching in sodium

Abdel Aal (2000) also studied the leaching of a zinc silicate ore containing willemite and The morphology of the zinc silicate concentrate before and during hemi morphite as major zinc phases and observed that increasing the leaching was examined by SEMEDS and is presented in Fig. 6.

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Hydrometallurgical Treatment of Low Grade Zinc Oxide Ore

The results show that over 90% of Zn can be extracted from the low grade complex zinc oxide ore when the leaching process is operated in 2M sulfuric acid at 60176;C for 2.5h with a liquid to solid ratio of 61.

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The processing of zinc silicate ores A review SpringerLink

Some comparisons are made with the new continuous leaching process recently developed by the Electrolytic Zinc Company of Australasia Limited. These comparisons, based on tests with two different zinc silicate ores, demonstrate the simplicity and effectiveness of the new process.

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WO2002072896A1 A method for the precipitation of silica

The invention relates to a method for the leaching of oxidized ores and in particular zinc ores. The ore, wherein the valuable metals are at least partially in silicate form, are routed to an acidic leaching stage in conditions where the silicate decomposes and the valuable metal ion comes into the solution. During leaching the silicate ion first dissolves, but simultaneously decomposes and is

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PQ Sodium Silicates PQ Corporation Home

Enhanced Ore Beneficiation PQ sodium silicates are used in numerous mining and mineral processing systems to improve valu able mineral recovery, while reducing unwanted contaminants. Their chief use in ore flotation is as a deflocculant for dispersing undesired clay. Sodium silicates also inhibit the corrosive wear of grinding media.

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Uranium processing Britannica

Uranium processing, preparation of the ore for use in various products. Uranium (U), although very dense (19.1 grams per cubic centimetre), is a relatively weak, nonrefractory metal. Indeed, the metallic properties of uranium appear to be intermediate between those of silver and other true metals and those of the nonmetallic elements, so that it is not valued for structural applications.

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