ph modifiers for enargite flotation

ph modifiers for enargite flotation

Effect of Eh and pH on the flotation of enargite using ...

Dec 01, 2020  The flotation data obtained at pH = 10.5 in seawater show a strong depression of enargite throughout the whole range of E h which can be explained by the adhesion of hydrolysis products of magnesium on enargite (Yepsen et al., 2019, Li and Somasundaran, 1991).

The Importance of pH in Flotation

Oct 21, 2020  The neutral point in the pH scale is 7.0, and the alkalinity of a pulp normally ranges from 7.0 to 8.5, although there are cases where a pH value as high as 13.0 has to be maintained. Soda ash is added to the circuit as a solid ; the addition of lime is sometimes made in this way, but it is generally preferable to feed it to the circuit in the ...

Flotation behavior of enargite in the process of flotation ...

Oct 01, 2019  The presence of enargite (Cu 3 AsS 4) in porphyry copper deposits is an important matter as this mineral shows good flotability in the presence of the thiol collectors used in the flotation copper sulfides thus contaminating the final concentrate.Besides a relevant problem in Chilean mining is the scarcity of water resources so the use of seawater has become a feasible solution.

pH Modifiers ArrMaz

pH MODIFIERS. Mineral conditioning and pH control can greatly affect flotation performance. Most mineral beneficiation processes require some type of pH adjustment to impart ideal separation conditions. As mineral feed quality continues to decrease, more sophisticated pH modifiers are needed to achieve optimum flotation performance.

US20080197053A1 - FROTH FLOTATION PROCESS WITH pH ...

This invention relates to the pH modifier in alkaline froth flotation processes to treat oxide and semi-soluble salt ores, such as phosphates, sulfates, carbonates and halides, to increase the recovery while generally maintaining or improving selectivity, thus the grade of desired minerals. The invented pH modifier is used to replace traditional alkaline pH modifiers—hydroxides, carbonates ...

Selective flotation of enargite and chalcopyrite Request PDF

Specific flotation separations are as follows.•Copper sulphides such as chalcocite and copper oxides such as cuprite could be floated from enargite at pH 11 after setting the potential to about ...

pH Ranges for Sequential Cu Pb Zn Flotation Separation

Mar 17, 2017  pH 10.5-12 is where Fe is least hydrophobic while Zn (and Cu/Pb) is most hydrophobic. Great pH to Recover Zn. By modifying Flotation pH to create kinetic/speed differences between the metals and achieve sequential flotation and take full advantage of the hydrophobic nature of each mineral, it is best to first lower the pH and see about ...

Effect of H2O2 and potassium amyl xanthate on separation ...

Jun 15, 2020  However, Sasaki et al. (2010) reported that enargite remained floatable at pH 11 after the oxidation treatment. Meanwhile, Guo and Yen (2005) showed that the collectorless floatability of enargite at pH 10 is Eh dependent. Enargite did not float at potential lower than 0.094 V (vs. SHE) and its flotation recovery increased when the pulp ...

The effect of pH modifier on the flotation of celestite ...

Oct 01, 1998  This paper studies the influence of two pH modifiers, namely sodium hydroxide (NaOH) and sodium carbonate (Na 2 CO 3), on the flotation of celestite ore using sodium oleate as the collector and sodium silicate (Na 2 SiO 3) as the depressant.The use of Na 2 CO 3 provides the best results for the concentration of celestite, under the same experimental conditions.

Flotation Conditioners -Modifiers -Activators -Depressants

Mar 19, 2017  This branch of chemicals will prepare the mineral surface so other reagents will be able to collect the metal. For Conditioners and Modifiers, it may be simply cleaning the surface of the particles, as in the case of removing oxidization, or it may be a chemical that these are the chemicals that bind the mineral to the air bubble to be lifted away from the waste.

TECHNICAL NOTE THE EFFECT OF pH MODIFIER ON THE

Effect of pH modifier on flotation of celestite 991 at 10 -2 M, giving rise to intense mineral depression. G~ilvez [4], found a similar effect of the depressant Na2SiO 3 when working in alkaline media on pure minerals. Likewise, at low depressant concentrations (10

Investigation of Flotation Parameters for Copper Recovery ...

In mix ore (enargite + chalcopyrite) flotation, 97% of enargite was first removed at pH 4 followed by chalcopyrite flotation at pH 8, and over 95% recovery was achieved in 15 min flotation time. The As content in the final tailings was reduced to 0.1 mass%.

Optimisation of Spodumene Ore Flotation using Zeta Potentials

Figure 4. Zeta potential versus pH curve of enargite, circles represent solution conditioned for 60 minutes in nitrogen environment, triangles are in presence of oxygen. Filled shapes represent pH change from 11 to 5, empty shapes represent reverse pH change. [16] Figure 5.

Classification of the Major Copper Sulphides into ...

Oct 01, 2016  For this reason it is common to see the use of lime as a pH modifier in a copper circuit to reject pyrite. 2.2. Case 2: Copper and iron sulphide minerals with an arsenical tenor2.2.1. Enargite. Enargite flotation and depression was investigated for the flowsheet development of the Tampakan ore deposit, Philippines, by Senior et al. (2006).

Froth flotation process with pH modification - ARR-MAZ ...

What is claimed is: 1. A process for increasing a flotation recovery with improved concentrate grade of desired minerals in alkaline froth flotation processes of oxide and semi-soluble ores, the method comprising, instead of using traditional pH modifiers, including caustic soda, soda ash, lime and ammonia for pH adjustment and using soda ash or ammonia to adjust pH during fatty acid/fuel oil ...

Flotation Collectors - Mineral Processing Metallurgy

Oct 21, 2020  For industrial sulfide mineral flotation, the xanthates and dithiophosphates are the major classes of Flotation Collectors compounds used, where M+ is either Na+ or K+, and R is a relatively short hydrocarbon chain typically containing two to five carbon atoms. The solubility, pH application range, physical state (solid or liquid), and ...

ph modifiers for bornite flotation - ctbuskersfestival.co

ph modifiers for enargite flotation. pH Ranges for Sequential Cu Pb Zn Flotation Separation. MBS is the pH modifier of choice to dropping pH into a zone where Cu is hydrophobic while all other metals are hydrophilic provided an opportunity As MBS is added and pH drops from Natural pH 9 other minerals are

(PDF) BULK FLOTATION OF COMPLEX COPPER ORE Khmer Lee ...

As a result, modifiers that regulate the pH are of great importance. The most commonly used pH regulators are lime, soda ash and, to a lesser extent, caustic soda. In sulfide flotation, however, lime is by far the most extensively used. In copper sulfide 13 flotation, which dominates the sulfide flotation industry, or example, lime is used to ...

Flotation - CONCENTRATION OF MINERALS

and Ph.D. Natalia Petrovskaya The model allowing to describe correctly kinetics and speed of flotation of raw mineral material of any kind are proposed. The model take into account delay in extraction of a component in concentrate, upper limit of component’s extraction, inclination of e (t) parameter* and can be considered as universal ...

Electrical separation - CONCENTRATION OF MINERALS

Ph.D. Igor Bobin, Ph.D. Natalia Petrovskaya. MINING SERVICES. Concentration of minerals, mineral separation, enrichment of minerals, flotation, magnetic separation ...

BENEFICIATION OF ARSENIC BEARING COMPLEX SULPHIDE

flotation behaviour of enargite is similar to that of chalcocite. Tennantite and tetrahe-drite do not respond well to flotation using xanthate as a collector. Tetrahedrite floats well with aerophine and mercaptan type of collectors at a pH value between 8 and 10 (Bulatovic, 2007).

Froth flotation - Wikipedia

Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic.This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.

PH Froth Modifiers For Mining – Kemcore

The role of pH modifier and the dosage affect flotation . From test results, it was confirmed that sodium silicate and other chemicals can be be used with depressant and dispersant could adjust the pH of pulp . Flotation efficiency using pH modifier is better than that using lime in the alkaline conditions (pH

US20110155651A1 - Separation of copper minerals from ...

US20110155651A1 US12/960,041 US96004110A US2011155651A1 US 20110155651 A1 US20110155651 A1 US 20110155651A1 US 96004110 A US96004110 A US 96004110A US 2011155651 A1 US2011155651 A1 US 2011155651A1 Authority US United States Prior art keywords feed sulfide valuable metal flotation copper Prior art date 2009-12-04 Legal status (The legal status is

Flotation Reagents’ Types and Working Principles CNFREE

pH modifiers: It is a kind of reagent mainly used to adjust the pH value of the flotation slurry, control the surface characteristics of the mineral and the chemical composition of the slurry to achieve the conditions required for flotation. Commonly used pH modifiers are lime, sodium carbonate, sulfuric acid and sodium hydroxide, etc.

THE USE OF PULP POTENTIAL CONTROL TO SEPARATE

When the flotation response of enargite at pH 11 is compared with the flotation response of chalcocite at the same pH (refer Figure 1) two possible windows wherein separation of chalcocite and enargite should be possible are obvious. The first is a relatively narrow window between -150 mV and -25 mV SHE in which chalcocite floats ahead of enargite.

Froth Flotation Process - Detailed Explanation With ...

pH Modifiers. pH is also a very important factor in the process of floatation. Even a slight change in the pH of the slurry can result in loss of productivity and efficiency of the operation. Thus to ensure the optimum use of the resources and production is maximum pH modifiers are used. Lime, Sodium carbonate, Sodium hydroxide and Ammonia are ...

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

(PDF) Handbook of Flotation Reagents Chemistry, Theory and ...

Handbook of Flotation Reagents Chemistry, Theory and Practice: Flotation of Sulfide Ores. Serkan Gökçen. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 36 Full PDFs related to this paper. READ PAPER.

ph modifiers for bornite flotation - ctbuskersfestival.co

ph modifiers for enargite flotation. pH Ranges for Sequential Cu Pb Zn Flotation Separation. MBS is the pH modifier of choice to dropping pH into a zone where Cu is hydrophobic while all other metals are hydrophilic provided an opportunity As MBS is added and pH drops from Natural pH 9 other minerals are

Flotation - SGS

solutions for more efficient flotation. SULPHIDE FLOTATION SGS Minerals Services has over 70 years of experience in the design and evaluation of sulphide base metal flotation regimes, with more than a thousand ores including the minerals • argentite • arsenopyrite • bornite • chalcopyrite • covellite • enargite • galena ...

(PDF) Handbook of Flotation Reagents Chemistry, Theory and ...

Handbook of Flotation Reagents Chemistry, Theory and Practice: Flotation of Sulfide Ores. Serkan Gökçen. luis araya. Serkan Gökçen. luis araya. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER.

(PDF) Flash flotation of free coarse gold using ...

Flash flotation of free coarse gold using dithiophosphate and dithiocarbamate as a replacement for traditional amalgamation. Flash flotation of free coarse gold using dithiophosphate and dithiocarbamate, 2018. Pablo Bustamante-Baena. Julian David Osorio Botero. Alan Jose Daza Aragon.

high quality reinforced polypropylene copper ore flotation ...

The objective of this study was to assess the effect of lime and soda ash as pH modifiers on the flotation of a copper gold ore mixed with kaolinite at different concentrations. For the flotation . Know more. The selective flotation of enargite from other copper .

US Patent Application for SEPARATION OF COPPER MINERALS ...

Dec 03, 2010  The process is particularly applicable to the flotation separation of copper sulfides, such as chalcocite (Cu 2 S), bornite (Cu 5 FeS 4), chalcopyrite (CuFeS 2), covellite (CuS), tetrahedrite (Cu 12 Sb 4 S 13), tennantite (Cu 12 As 4 S 13), and enargite (Cu 3 AsS 4) and/or molybdenum sulfide (e.g., as molybdenite (MoS 2)), on the one hand from ...

Recovery of phosphate minerals from plant tailings using ...

the flotation pulp, pulp pH and pulp residence time were investigated to optimize the flotation outcomes in terms of the recovery and the grade of the concentrate products. Studies using a dual dispersant/depressant system, at a specific mass ratio, were also

Electrical separation - CONCENTRATION OF MINERALS

Ph.D. Igor Bobin, Ph.D. Natalia Petrovskaya. MINING SERVICES. Concentration of minerals, mineral separation, enrichment of minerals, flotation, magnetic separation ...

Modifiers For Chalcocite Flotation - Nicolini Preschool

Modifiers For Chalcocite Flotation. Flotation Plant. Flotation plant is widely used in various fields of ore dressing industry. ... philippines froth flotation process. ... Investigation of Flotation Parameters for Copper Recovery from Enargite and Chalcopyrite Mixed Ore Kazutoshi Haga+, William Tongamp and Atsushi Shibayama Faculty of ...