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Study of Flotation Parameters for Copper Recovery from ...

collectors and the activation of sphalerite by heavy metal ions such as copper and lead. The different mechanisms of activation of sphalerite by copper and lead ions are discussed. The mineralogy of the Rosh Pinah ore is also presented in order to understand the parameters that may be involved during the selective flotation of the ore.

Flotation of sphalerite and pyrite in the presence of ...

the zinc flotation circuit after activation with copper sulphate. Selectivity against sphalerite poses a difficult challenge in the lead flotation circuit at the Rosh Pinah Mine, where cyanide dosages as high as 150-180 g/t are being used to suppress the flotation of sphalerite and pyrite at the concentrator.

THERMOMECHANICAL ASPECT OF SELECTIVE FLOTATION OF ...

copper-activated sphalerite is not efficient at lower dosages of zinc sulphate alone. In addition, Trahar et al. (1997) have shown that the use of zinc salts at pH 9 decreased the recovery of galena due to the coating by hydrophilic zinc hydroxide. A study on the deportment of sphalerite in the lead flotation circuit was carried out in the work

New collectors for sphalerite flotation

The flotation of sphalerite has been demonstrated without the use of collectors. The effect of redox potential, pH, and copper-activation have been investigated in tests using samples of pure mineral. It has been found that in general, collectorless flotation of sphalerite can be accomplished at potentials greater than -200 mV, SHE, and is more ...

Research Article Activation of Sphalerite by Ammoniacal ...

Plant and laboratory test work was performed in order to optimize a copper/zinc flotation separation circuit at Matagami concentrator, Canada. The testing identified a significant difference between the laboratory testing and the plant flotation, particularly for the sphalerite recovery in the rougher copper concentrate.

Effect of Copper Sulfate on Zinc Sphalerite Flotation

the processes of sulphides flotation. The adsorption of potassium isobutyl xanthate (KIBX 3⋅10-3M) on sphalerite has been studied using electrochemical potential, FTIR technique and SEM. Non activated minerals and minerals activated with copper sulfate (10-4 M) and copper nitrate (10-4 M) have been investigated at pH 7.5. Surface species have ...

MECHANISM OF SPHALERITE DEPRESSION IN AN OPEN …

Colloidal interactions between sphalerite and synthesized ZnS (analogous to sphalerite) and between silica and synthesized ZnS in aqueous solutions were studied using direct surface forces zeta potential distribution measurements. The role of flotation reagent including activator, depressant and collector in tuning surface forces was investigated.

Comparative study on the copper activation and xanthate ...

INDUSTRIAL COPPER AND ZINC FLOTATION PRACTICE Sphalerite ores are generally treated by flotation at pH 9 to 11 using lime as a regulator, copper sulfate as an activator and xanthates or dithfophosphates as collectors. Typical reagent quantities are 2.0-5.0 lbs per ton of regulator, 0.5 to 1.0 lbs per ton of activator, 0.1

US5599442A

May 30, 2016· Different sulphide ores respond differently in the prospect of copper activation to thiols for froth flotation. With the BCL Selebi-Phikwe ore body, pentlandite–pyrrhotite–chalcopyrite co-occur and there is the constraint of fine pentlandite dissemination in the pyrrhotite, so that liberation is limited. In the presence of pentlandite, …

Activation of Sphalerite by Ammoniacal Copper Solution in ...

Copper ion exchanges for zinc ion of the mineral surface, and the sphalerite particle then behaves in flotation like a copper sulphide particle. Depressants Depressants retard or inhibit flotation of a desired solid. The depressing agent is adsorpted on the particle surface, which pre-empts the collector from adsorbing and masks the adsorbed ...

THERMOMECHANICAL ASPECT OF SELECTIVE FLOTATION OF ...

Flotation tests were conducted in a 23-cm square section per 175-cm high laboratory flotation. Sodium isopropyl xanthate (SIPX) and copper sulfate (1.9 10 4 M) respectively served as col-lector and the activator. Overflowing froth was broken with an auxiliary system for removal or recycling to the feed tank (200 L), thus allowing a

Froth flotation of sphalerite: Collector concentration ...

The recovery of these copper minerals by flotation or hydrometallurgy from ores, typically containing 0.5%TCu (open pit mines) and 1-2%TCu (underground mines) is of …

Copper activation option for a pentlandite–pyrrhotite ...

Metallurgical ContentThe Problem with separating Copper from Zinc by flotationThe Copper Zinc Process FlowsheetCRUSHINGROD MILLING The Problem with separating Copper from Zinc by flotation The treatment of heavy sulphide ores of copper containing zinc and pyrite is often extremely difficult particularly if soluble copper and sulphates are present. This is usually the …

Role of Flotation Reagents in Tuning Colloidal Forces for ...

Shen et al. (2001) studied the effect of sodium sulphite on the flotation of sphalerite and pyrite in the presence of copper ions and they reported that sulphite promoted the formation of copper hydroxide on the surface of pyrite leading depression. Yamamoto (1980) proposed that sulphite ions depressed pyrite by

The Effect of Particle Size on the Activation and ...

copper-activated sphalerite is not efficient at lower dosages of zinc sulphate alone. In addition, Trahar et al. (1997) have shown that the use of zinc salts at pH 9 decreased the recovery of galena due to the coating by hydrophilic zinc hydroxide. A study on the deportment of sphalerite in the lead flotation circuit was carried out in the work

The effect of mode of occurrence of galena and sphalerite ...

The experimental data on copper-zinc ore flotation have shown that sphalerite and pyrite present at the final process stages of col-lective–selective flotation possess equal kinetics of floatability. This is particularly obvious in zinc flotation cycle, where pyrite is only depressed with lime and blue copperas activates both sphaler-

Influence of the Interaction between Sphalerite and Pyrite ...

Intergrowth of pyrite, sphalerite, tennantite and other copper sulphides, difference in their activity and size create the considerable problems in implementation of selective flotation, obtaining conditional copper and zinc concentrates. Despite several …

Electrochemistry of Copper Activation of Sphalerite and ...

Copper activation of sphalerite and its reaction with xanthate in relation to flotation: an X-ray absorption spectroscopy (reflection extended X-ray absorption fine structure) investigation Int J Miner Process, 1999

Activation of Sphalerite by Ammoniacal Copper Solution in ...

The copper flotation tailings are the feed to the sphalerite flotation circuit where the zinc minerals are floated as explained in the lead-zinc flotation section. Sphalerite is first activated with CuSO4 and floated typically at elevated pH for iron sulphide depression. Combinations of xanthate with either dithiophosphate and/or ...

An XPS Study of Sphalerite Activation by Copper | Langmuir

bloc flotation of galena and sphalerite fines 91 RESULTS AND DISCUSSIONS F l o c f l o t a t i o n o f single m i n e r a l s pH effect The floatability of flocculated galena and sphalerite fines induced by PAX as a function of pH is shown in Figure 3, in which the results from the conventional flotation of the same mineral samples under the ...

CANATUAN CU/ZN FLOTATION METALLURGY

As an example of the beneficial effect of copper sulfate in the activation of zinc sphalerite toward flotation, the series of results shown in Fig. 1 is of interest. These represent rougher tests on a sample of heavy pyritic ore. The particular …

Chapter 7. Depression of sphalerite with cyanide and zinc ...

Sphalerite is a zinc-bearing mineral available in abundance. Unfortunately, it has both inferior natural floatability and collector molecules adsorption thereby demanding the use of additional activators like copper sulfate for treating the mineral surface to improve its adsorption properties.