Chalcopyrite (Cu) Sphalerite (Zn) Separation by Flotation

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 case in ore deposits near the surface or in tropical countries where the annual rainfall is quite high.

Sulfidation of Oxidized Lead and Zinc with Pyrite-Bearing …

It is experimentally proved that selective oxidation of pyrite proceeds together with disintegration of lead and zinc along the interphase boundaries. The main products of such …

Dispersion effect on a lead–zinc sulphide ore flotation

This investigation was performed with samples from a lead–zinc sulphide deposit aiming at studying the influence of the dispersion degree of the particles in the pulp on lead and zinc flotation. Samples of ore and also of the minerals sphalerite, galena, pyrite, and dolomite were selected for the experiments.

Effect of activator on properties in sulfurous iron ore flotation

activation of sphalerite and pyrite by flotation of zinc ions. ... In the actual ore flotation test, 500 g of raw ore was weighed each time, and tap water was added to the .

Application and electrochemical depression mechanism of …

To inhibit pyrite under low-alkaline conditions, this study intended to take Yiliang high‑sulfur lead–zinc sulfide ore as the object and Na 2 SO 3 and CaO as the combined depressant for pyrite. ... Role of starch and metabisuphite on pure pyrite and pyritic copper ore flotation [J] Physicochem Problems of Mineral Processing, 48 (2011), pp ...

Efficient flotation recovery of lead and zinc from refractory lead-zinc

Therefore, the industrial flotation tests were mainly conducted to investigate the effect of collector MA and depressant SHP/SS on the selective flotation of zinc oxide ore. The feed ore of zinc oxide ore flotation process was the underflow of the hydrocyclones, and the flowsheet of industrial tests of zinc oxide ore flotation is shown in Fig. 8.

The role of depressant and pH in the selective flotation …

study. The mineralogical properties of the ore were fully investigated to aid in the choice of depressant and the pH environment to carry out flotation for the copper-zinc ore. 2. Experimental 2.1 Materials and reagents used. The ore samples used in the experiment were obtained from a mining company in Japan. The reagents

Flotation separation of pyrite and carbonate minerals from …

The optimum ratio of pyrite flotation with combined collector is 3, and the recovery rate of pyrite flotation is 37%, which is higher than that of pyrite flotation recovery of 30.5% when ...

Maximise pyrite depression in copper ore flotation using …

The depression of pyrite in copper ore flotation is a challenge in high salinity water although natural pyrite can be depressed readily at alkaline pH due to the formation of iron hydroxides on pyrite surfaces (Boulton et al., 2001, Mu et al., 2016).In copper ore flotation, a galvanic interaction occurs between copper minerals and pyrite with copper minerals acting as …

A New Innovative Method of Flotation Separation for High …

Galena–Pyrite Bulk Flotation. The particle size has a significant effect on the flotation behaviors of minerals; therefore, the effect of grinding fineness (−0.074 mm) on galena -pyrite bulk flotation was firstly investigated and the results are shown in Fig. 2a. As can be noted that the recovery of lead, zinc, and sulfur was increased simultaneously as the proportion of …

The Importance of pH in Flotation

Some minerals like Iron pyrite will not float well in an alkaline flotation circuit. An alkaline solution is also slightly caustic, this will help clean the surface of the mineral. ... Its application is confined mainly to the flotation of lead and zinc ores and tailings. Some inorganic salts decompose it and it is therefore often necessary to ...

Application and depression mechanism of sodium sulfite on galena-pyrite

In this study, Na 2 SO 3 and lime were used as pyrite depressants for the flotation separation of the lead and zinc ore. The influence of Na 2 SO 3 on pre-adsorbed EX was investigated through micro-flotation experiments, contact angle measurements, ultraviolet–visible spectroscopy (UV–Vis), and time of flight secondary ion mass spectrometry ...

Assessing the depression of high-concentration pyrite in …

The pyrite recovery from the flotation of the copper ore with 25 % pyrite was finally reduced as the pH increased from 10.5 to 11.5. Nonetheless, the improved Cu concentrate grade was limited, only comparable to that produced from the flotation of the copper ore with 5 % pyrite at pH 9.0. To understand why the high-concentration pyrite could ...

Depression of pyrite in the flotation of high pyrite low …

In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus ...

Evaluation of the replacement of NaCN with Acidithiobacillus

We investigated the replacement of NaCN with Acidithiobacillus ferrooxidans, in the flotation of a low-grade lead–zinc ore containing high amounts of pyrite.A. ferrooxidans were adapted to original ore, and its growth curves were monitored before and after adaptation. Because of its characteristics, the addition of original ore caused the bacterial cell count to …

Flotation of Pyrite

To make certain that the material in each case was uniformly mixed and to determine the pyrite, copper, and zinc in each sample, a number of assay samples were taken during the subdivision into the 500-gm. portions, and analyzed. ... The percentage of pyrite or other sulfide mineral in an ore would, to a certain degree, affect the other factors ...

Solving the mystery of natural pyrite flotation

Pyrite is known to readily report to flotation concentrates, diluting their value and resulting in excess sulphur dioxide production during smelting. The presence of pyrite in …

Surface chemistry investigation of froth flotation products …

Lab-scale experiments results show that the new process contributed to the flotation of the complex mixed sulfide-oxide lead and zinc ore regarding two aspects: (1) High alkaline process (pH = 12±) was replaced by low alkaline process (pH = 9±) by using collector WS (a mixture of ethyl thiocarbamate, ammonium dibutyldithiophosphate and ...

Pyrite Depression in Copper Flotation

The more flotation collector you have on, the higher you will need to increase that pH for effective pyrite depression. You also need to insure your pyrite and copper minerals are well liberated for good chemical separation by pH. In froth flotation, depressing pyrite or any metal is impossible if minerals are locked.

Flotation Reagents: Uses and Advantages in Ore Processing

An alkalinity modifier regulator and depressor of pyrite. Used extensively in lead-zinc flotation. Liqro: A Crude tall oil, bi-product from paper pulp manufacture. Water emulsion.5 to 2.5: Contains fatty and resin acids and is used as a substitute for oleic acid in flotation of non-metallics. Lintz Reagent R-52 A surface active agent dry powder.

Application and electrochemical depression mechanism of …

Real ore sample flotation separation tests showed that the mixed depressant can efficiently depress pyrite from galena-pyrite mixed concentrate. The obtained galena concentrate had a Pb recovery ...

Mineralogy and Innovative Flash Flotation Separation of Cu …

Pyrite in complex metallic ore is a widely distributed sulfide on earth, commonly associated with copper, lead, and zinc sulfides, as well as gold and silver [1,2].The production of separate concentrates from ores containing economic amounts of copper, lead, and zinc is complicated [], especially for ores with high pyrite content [4,5,6,7].Due to copper, lead, and …

Depression of pyrite in the flotation of high pyrite low-grade …

In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and presence of …

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

The aim is to remove separate concentrates in a complex ore. This is driven by smelting practice and concentrate contracts which penalise impurities in For example in a lead/zinc sulphide ore …

Developments in Milling Practice at the Lead/Zinc …

Figure 5 - Zinc circuit laboratory flotation performance of different ore types. Zinc metallurgical performance (Figure 5) varies over a smaller band, due to low zinc losses in the lead circuit and the ability to be more selective against pyrite. The methods used in the laboratory have shown good agreement with plant performance and provide

Full article: Impact of Pyrite Textures Prevalence on Flotation

Approximately 90% of the achieved pyrite flotation recovery is associated with true flotation, and the highest entrainment is measured for the OD1-Leached ore ... Influence of electrochemical environment on the flotation behaviour of Mt. Isa copper and lead-zinc ore. International Journal of Mineral Processing 30 (1):69–97. doi:10. ...

Sulfidation mechanism of ZnO roasted with pyrite

For example, Li et al. 32 investigated the recovery of lead and zinc from low-grade lead-zinc oxide ore by sulfidation roasting and flotation process. The results showed 79.5% Pb and 88.2% Zn were ...

Flotation of Copper-Lead-Zinc Ores

The polymetallic separation flowsheet of copper/lead bulk flotation - copper/lead separation - priority flotation zinc ... [Show full abstract] and pyrite from the bulk flotation tailings was used ...

Froth Flotation 101 in Video

In floating copper ores and lead-zinc ores, depression of the iron pyrite is important; but in floating gold-silver ores, the free gold and the iron pyrite are floated. ... The quantity consumed is 1/20 to 1/5 pound per ton of ore. For sulphide flotation various wood oils have been used, the most common being pine oil, particularly steam ...

Critical importance of pH and collector type on the flotation …

Collector type and pulp pH play an important role in the lead–zinc ore flotation process. In the current study, the effect of pulp pH and the collector type parameters on the galena and...

Flotation Depressant

Inorganic depressants mainly include lime, zinc sulfate, sulfur dioxide, sulfurous acid, and its salts, sodium sulfide, water glass, phosphate, and cyanide, etc. (1) Lime. It can be used for the flotation of copper sulfide ore and lead-zinc …

How to Process Low-Grade Lead Zinc Ore by Flotation

The zinc tailings pass over a Table which gives the operator a constant, visual picture of the efficiency of the zinc flotation machine, and also recovers additional zinc values. Zinc concentrates are fed to a Table to remove any lead oxide values which may have floated with the zinc, and then are thickened in a Thickener.

Depression of pyrite in the flotation of high pyrite low …

In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus ferrooxidans. Pyrite was significantly depressed with these bacteria using the optimum dosage of reagents.

Flotation Depressants

The commonest depressing reagents are lime, sodium cyanide, and zinc sulphate. Lime is extensively used to prevent pyrite from entering the concentrate of other minerals particularly copper and zinc sulphides. Its action …