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froth flotation sodium cyanide in flotation of copper:

Sodium Cyanide in Flotation of Copper - Froth Flotation ...

Yes, cyanide is used as a depressant for pyrite in copper flotation. There are however a number of alternatives such as sodium meta-bisulphite (SMBS) or a combination of lime & NaCN or lime & SMBS, soda ash and NaOH (all pH modifiers together with NaCN or SMBS).

Flotation Depressants - Mineral Processing & Metallurgy

Aug 12, 2015 · Sodium cyanide. Sodium cyanide is mainly used to depress sphalerite in the first or lead-flotation stage in separating lead from zinc minerals. Its action on pyrite is nearly as strong as on sphalerite, but it does not affect galena unless a large excess is added or the contact time is too long. The effect of sodium cyanide is often intensified ...

Flotation Reagents - Mineral Processing & Metallurgy

Jun 08, 2016 · Sodium silicate, quebracho, and also cyanide are common depressants in non-metallic flotation. How much Flotation Depressants is needed Depressants are generally added to the grinding circuit or conditioner usually before addition of promoting and frothing reagents .

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Froth flotation method for recovering copper, nickel, silver, mercury, bismuth, and lead values from their ores by applying thiourea or any substituted thiourea in conjunction with hydrochloric, nitric, sulfuric, phosphoric, oxalic, hexacyanoferric (II), thiocyanic, or cyanic acids to obtain pure copper, nickel, silver, mercury, bismuth, and lead concentrates, which comprises; adding to a ...

Selective Flotation for Copper-Lead-Zinc without Cyanide ...

We developed a new method of selective flotation concentration by applying an effective, non-toxic cyanide-free depressant for Galena “DG / 1” and depressant for “Zinc DZ / 2”. Galena and Zinc depressants are our own patented and laboratory tested products on ore samples of a small lead-zinc and copper mine in South East Europe.

Alternatives for Sodium Cyanide for Flotation Control

Recovery is about 90 percent. In addition to copper, operations belonging to the company recover molybdenum, gold, silver, selenium, platinum, paladium, and various rhenium salts. These mills use sodium cyanide to depress pyrite during copper flotation at a

Removal of copper cyanide by precipitate flotation with ...

Jan 01, 2020 · After flotation, the froth product and remaining solution were placed in two different beakers. The volume of the remaining solution was measured and the residual cyanide and copper concentrations were analyzed.

Pyrite Depressant - Froth Flotation (Sulphide & Oxide ...

Froth Flotation (Sulphide & Oxide) ... Flotation of copper at different alkaline pH from 7upto 10 and using different Xanthates as collector vs. recovery of copper may give some clue. Minimum Pyrite obtained in copper concentrate is the starting point for further flotation test work. ... Sodium cyanide is the only chemical which can depress ...

US4256227A - Froth flotation method for recovering metal ...

Froth flotation method for recovering copper, nickel, silver, mercury, bismuth, and lead values from their ores by applying thiourea or any substituted thiourea in conjunction with hydrochloric, nitric, sulfuric, phosphoric, oxalic, hexacyanoferric (II), thiocyanic, or cyanic acids to obtain pure copper, nickel, silver, mercury, bismuth, and lead concentrates, which comprises; adding to a ...

Copper Flotation - Mineral Processing & Metallurgy

May 16, 2016 · A Copper Flotation Flowsheet. Because the copper in this type of ore usually assays only plus or minus 1% copper, the porphyry copper operations must be relatively large in order to be commercial. The flowsheet in this study illustrates a typical 3,000 ton per day operation. In general most operations of this type have two or more parallel ...

US4514292A - Froth flotation process - Google Patents

The froth flotation of ore and coal is significantly improved in recovery and grade of valuable minerals and coal when a depressant combination of an inorganic sulfite and the salts of certain sulfonated compounds are employed. US4514292A - Froth flotation process -

US10005088B2 - Flotation of sphalerite from mixed base ...

The main objective of the invention was to develop a new flotation collector that could eliminate or reduce the amount of copper sulfate used in the flotation of sphalerite. Different series of collectors such as cupferrons, arylhydroxamic acids and amino mercaptans or amino thiols were synthesized and tested. Amino mercaptans/aminothiols were found to be very effective in floating sphalerite ...

What is the role of depressant in froth floatation process?

For example, sodium cyanide is a depressant used for an ore containing Z n S and P b S. N a C N forms a layer of the complex N a 2 [Z n (C N) 4 ] on the surface of Z n S and prevents it from forming a froth. Thus, it acts as a depressant. However, N a C N does not prevent P b S from forming froth and allows it to come with froth.

FROTH FLOTATION | Wetting | Chemical Compounds

Sodium cyanide, Zinc sulphate etc.] ORGANIC (or POLYMERIC) [eg. Starch, tannin, Quebracho, Dextrin etc.] Cyanides are the most commonly used in the selective flotation of Lead-Copper-Zinc and Copper-Zinc systems as Depressants for Sphalerite and pyrite ores.

Handbook of Flotation Reagents - MESA

Handbook of Flotation Reagents Chemistry, Theory and Practice: Flotation of Sulfide Ores by Srdjan M. Bulatovic • ISBN: 0444530290 • Publisher: Elsevier Science & Technology Books • Pub. Date: April 2007

The Application of Xanthate in Froth Flotation Process ...

Apr 11, 2019 · Xanthate, as the flotation collector with strong collection effect, is mainly used to enhance the hydrophobicity of the mineral surface to meet the requirements of flotation.Xanthate is commonly used in the flotation process of sulfide minerals. Xanthate is a combination of alcohol, sodium hydroxide and carbon dioxide, which is an anionic collector. . It is light yellow, soluble in water and ...

Flotation Behavior of Complex Sulfide Ores in the Presence ...

Jun 12, 2017 · Results obtained from this work show that chitosan polymer has a promising future as a biodegradable alternative to sodium cyanide for the purpose of depressing pyrite in sulfide minerals flotation. 1. Introduction. Froth flotation has found extensive use in the mineral processing industry especially in treating low grade ores.

Froth flotation method for stibnite - Engelhard Minerals ...

The essence of the invention resides in using a zinc cyanide compound, preferably the relatively insoluble zinc cyanide (Zn(CN) 2), with a thiocarbanilid reagent to activate the flotation of lead and/or copper sulfides. A soluble lead salt may be added when antimony sulfides are also present in order to activate the antimony, such use of a lead ...

froth process in silver ores

In The Cyanide Process For Extraction Of Gold And Silver. after the preliminary crushing and concentration by froth floatation process, the ore (crushed auriferous rocks in the case of gold) is leached with dilute (0.4 - 7) solution of sodium cyanide made alkaline by adding lime kept agitated by a current of air. silver (or gold) pass into solution as.froth flotation method for sulphide ...

ALTERNATIVES FOR SODIUM CYANIDE FOR FLOTATION

May 24, 2002 · Cyanide plays a role of varying importance in the metallurgy of gold, silver, copper, nickel, cobalt, lead, zinc, molybdenum, and cadmium. In the copper, lead, and zinc industries the primary uses for cyanides are as depressants for the flotation of iron and zinc minerals and for the reactivation of copper minerals in the flotation of molybdenite.

The following reagents are used in froth flotation of ...

Sodium Cyanide 4. Sodium Hydrogen Sulphide 5. Copper Sulphate For each one of them: (a) State the general class to which the reagent belongs and the role of the class in flotation (b) For each specific reagent listed, Question: The following reagents are used in froth flotation of minerals for recovery of metals values. 1. Sodium Normal Butyl ...

FROTH FLOTATION : RECENT TRENDS Flotation of Sulphide

As regards other reagents used in sulphide flotation, depressants like sodium cyanide, ZnSO4, sodium meta bi-sulphite are common. Effectiveness of depressant also depends on concentration and selection of collectors. In case of cyanide as iron sulphide depressant there is a relationship between concentration of collector and cyanide ion present.

Flotation Behavior of Complex Sulfide Ores in the Presence ...

Jun 12, 2017 · Results obtained from this work show that chitosan polymer has a promising future as a biodegradable alternative to sodium cyanide for the purpose of depressing pyrite in sulfide minerals flotation. 1. Introduction. Froth flotation has found extensive use in the mineral processing industry especially in treating low grade ores.

Effect of cuprous cyanide, dry and wet milling on the ...

Jan 01, 2006 · Copper cyanide stock solutions (10 −4 and 10 −3 M Cu(I)) were prepared by addition of CuCN powder to a sodium cyanide solution at a CN − /Cu molar ratio of 3:1 and at pH of 10.5, which was maintained by additions of sodium hydroxide solutions. 3.2. Flotation

DE-ZINCING OF LEAD-COPPER SULPHIDE MINERALS

flotation. A series of de-zincing on lead-copper flotation tests has been conducted in the laboratory to reduce unwanted zinc content. Dosages variation of common sphalerite depressant such as sodium cyanide, sodium bisulphite combined with zinc sulphate were employed in addition to flotation time and pH regula-tors alteration.

Recovery of zinc from cyanide tailings by flotation ...

Dec 01, 2015 · Abstract. The present research investigates sodium hypochlorite, hydrogen peroxide, sodium metabisulfite and copper sulfate as activators to lessen the depressant effect of cyanide. The results indicate that the zinc recovery exceeded 93%, 90%, 85% and 95% at the dosages: sodium hypochlorite 1.5 ml/L, hydrogen peroxide 2 ml/L, sodium ...

Effect of cuprous cyanide, dry and wet milling on the ...

Batch flotation tests of a lead–zinc sulphide composite ore from the Rosh Pinah Mine have been carried out at pH 8.5 in the presence of copper cyanide complexes. These copper cyanide complexes are often found in the recycled water that is used in the milling and the lead flotation circuits.

Cyanide chemistry and its effect on mineral flotation ...

Nov 01, 2014 · Cyanide has been widely used as a depressant in sulphide mineral flotation. It occasionally activates mineral flotation as well. In addition, cyanide species in the water from gold cyanidation process may be recycled to flotation circuits and have an inadvertent effect on mineral flotation. Therefore, the investigation on mineral flotation in ...

What is the role of depressant in froth floatation process?

For example, sodium cyanide is a depressant used for an ore containing Z n S and P b S. N a C N forms a layer of the complex N a 2 [Z n (C N) 4 ] on the surface of Z n S and prevents it from forming a froth. Thus, it acts as a depressant. However, N a C N does not prevent P b S from forming froth and allows it to come with froth.

Flotation Behavior of Complex Sulfide Ores in the Presence ...

Jan 01, 2017 · Frother was the last reagent to be added. Dosages of sodium cyanide, zinc sulphate, sodium isopropyl xanthate, and MIBC were kept the same in all flotation experiments at dosages of 2.26g/ton, 680g/ton, 317g/ton, and 470g/ton of ore, respectively, unless otherwise stated. Agitator was set at a rotation rate of 1000 RPM.

Froth Flotation Process - Detailed Explanation With ...

Such ores containing multiple metals such as lead, copper and zinc can be selectively extracted by using froth floatation. The minerals that do not float into the froth are called the flotation tailings or flotation tails. The froth flotation process was first patented by

FROTH FLOTATION- SWAPNIL NIGAM - SlideShare

Oct 28, 2011 · froth flotation- swapnil nigam 1. f r o t h f l o a t n t i o a presentation on prepared by:- swapnil nigam guided by:- prof.

Flotation process of lead-, copper-, uranium- and rare ...

A process and flotation agents are provided for flotation of lead-, uranium-, and rare earth-type minerals and ores in which an aqueous pulp of the mineral or ore is subjected to a froth flotation, characterized in that the flotation is performed in the presence of a tertiary amine flotation agent having the general formula: ##STR1## wherein: R is a aliphatic hydrocarbon group having from ...

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