Florrea MaxLeadZinc@ Solution

Better Flotation for Lead-zinc separation

In order to achieve better economical extraction of valuable resources of lead sulfides minerals , zinc sulfides minerals and precious metals along with our expert advice and technical support, Florrea MaxLeadZinc@ Solution is designed to provide value added specialty chemicals and technologies for lead and zinc ore flotation , for the purpose to improve separation efficiencies between Lead sulfides minerals with zinc sulfides and iron sulfides minerals.

 Ores :Lead Zinc ores

Main Minerals                            

Galena, Cerrusite,                                              

Anglesite, Sphalerite

 Marmatite,smithsonite                           

Silver, Gold & electrum                                     

Tetrahedrite/Tennantite

Gold & Silver associated with sulfides

Minerals Values : Pb/Zn /Au/Ag

Benefits of Florrea MaxLeadZinc^? Solution

√  Maximize Pb/Zn/Ag recovery

√  Gold and silver recovery increased

√  Excellent selectivity  against zinc sulfides and iron sulfides.

√  Differential flotation of galena from sphalerite and rejection of pyrite and pyrrhotite. 

√  BESTREC collectors induced minor improvements in zinc grades and recoveries.

√  Zinc recovery in the lead concentrate and lead recovery in the zinc concentrate improved

√  Rejection of gangue carbonaceous minerals, dolomite or magnesite

 

Most lead-zinc ores can be classified as complex ores, and recovery problems will increase with the degree of dissemination of the minerals.

Flotation separation and recovery of lead and zinc concentrates from ores containing galena (PbS) and sphalerite (ZnS) is well established and generally achieved quite effectively.

Silver often provides highly significant economic value, if not the greatest value, with the silver most often associated with the galena mineralization which is fortuitous since smelters pay more for silver in lead vs. zinc concentrates.

 

The non-values include iron sulphides such as pyrite and pyrrhotite that, while are often floatable, can be controlled. Siderite, an iron carbonate mineral, is often also associated in at least some minor quantity.

Marmatite ((Zn,Fe)S) is an iron-rich sphalerite which consequently results in lower zinc concentrate grades. Marmatite concentrates have a lower zinc level due to dilution from the iron minerals.

Flotation Reagents Schemes  of MaxLeadZinc Solution

General practice in the treatment of lead-zinc ores is to float the lead concentrate first, while depressing the zinc minerals for the recovery of high grade Pb and Zn concentrate and rejection of iron sulfides.

After lead flotation, the zinc minerals are reactivated with copper sulfate and floated selectively.

Separations are made possible by galena’s inherent natural hydrophobicity and due to the fact that sphalerite as a mineral is not easily collected by flotation reagents.

 

Lead circuit

→  COLLLECTOR for Lead, Silver + Gold

?  Primary collectors  : Florrea MaxLead^? 

·           Florrea 22A: excellent collector for galena and precious metals and selective against sphalerite ,pyrite and pyrrohotite.

·           Florrea 41: Excellent collector for argentiferous galena with high degree of selectivity against zinc minerals

·           Florea 4650 : unsurpassed for galena bearing silver

·           Florrea 2701: used primarily for silver and lead flotation especially when tarnished galena is present.

·           Ecoxanthate @ Florrea 5013A,4105 : Formulated Florrea collectors often used as partial or full replacement of xanthate for galena flotation

?  Secondary collector

·           Florrea 32 is selective against sphalerite and can improve flotation power.

→  Frother

·           Florrea M42: selective frother with minimal persistence. MIBC replacement. Lower dosage.

·           Florrea 522 : used in selective flotation and when clays/slimes are present. Selective frother with minimal persistence. Slightly stronger than MIBC.

·           Florrea 541: selective frother with fast kinetics.

·           Florrea 572: low-medium strength frother

·           Florrea 598: medium strength frother

·           Florrea 579: Relatively strong frother, but with better kinetics and coarse particle recovery. Excellent frother for zinc circuit as well.

·           Florrea M54: excellent selective frother for Zn/Pb flotation.

·           Florrea 55: promote fast kinetics. Selective against gangue minerals.

→  Depressant

?  sphalerite depressants

ZnSO4,Na2SO3,Na2S2O5,SO2,NaCN,Zn(CN)2,or   combination used to depress Zn and iron sulfides.

?  Depressants of iron sulfides pyrrhotite

Florrea D171 depressant is formulated to depress pyrrhotite in the flotation of simple metal sulfide and complex polymetalic bearing ores, such as Cu-Zn, Zn-Pb, and Ni.

?  Depressants of iron sulfides pyrite

Florrea D177 depressant

?  Depressants and rejection of gangue carbonaceous shale

Some lead-zinc ores contain carbonaceous shale or graphitic compounds which tend to dilute the lead concentrate, retard lead flotation rate or cause an unmanageable froth condition. The use of depressants Florrea D160,D161 the lead roughing circuit and lesser amounts in the cleaning circuit can alleviate these conditions.

→  pH modifiers

?   Soda ash is normally used for pH control at around 8-10

Lime may has a depressing effect on free gold recovery.

It has also been noted that zinc minerals may become activated by lime

 

 

Zinc circuit  

Florrea MaxZinc Solution

Florrea MaxZinc solution can float zinc sulfide minerals at NO LIME , NO XANTHATE,

and bring mining industry a lot benefits Compared with traditional xanthate sphalerite

collector which has to work at pH in the range of 10-12 for pyrite and pyrrhotite

depression

 

→  Activator

Activation of Zinc minerals : copper sulfate through depressing any pyrite .

→  Collector

?  Sphalerite collector: Florrea 1205, 9200, 9964,221,224,2255,5103A,4105 as xanthate replacement

?  Pulp pH: natural or mildly alkaline

→   Depressant

?  Dolomite depressants

Rejection of gangue dolomite or magnesite

The undesired presence of dolomite or magnesite fines in the zinc concentrate may be reduced by the use of  Florrea D168 Depressant, Florrea D100X depressant, usually added to the zinc cleaner circuit.

 

Pyrite circuit

Florrea MaxPyrite Solution

A number of operations recover a pyrite concentrate after flotation of the lead and zinc minerals.

→  pH modifier

 This is usually accomplished by adding sulfuric acid to the zinc circuit tailings to lower the pH to between 7 and 8.5.

→  Pyrrhotite activator

Florrea A621A is good activator than copper sulphate for pyrrhotite.

→  Pyrite activator

the addition of a small amount of copper sulfate for the reactivation of pyrite.

→  Pyrite collector

√  The pyrite is floated with Florrea 2701 or Florrea 2702 collectors or isobutyl or amyl xanthate.

√  Ecoxanthate collector: 5013A,4105 as xanthate replacement

It is also possible to float the pyrite with Florrea collectors without pH adjustment