Synonyms : LEAD NITRATE,Lead dinitrate,Lead(II) nitrate,Plumbous nitrate,Lead(2+) nitrate,Nitrate de plomb [French],Lead nitrate (Pb(NO3)2),Lead(II) nitrate (1:2),Nitric acid, lead(2+) salt
Recommended use: Accelerator in gold cyanidation.
Flotation -Activator for stibnite (Sb2S3) in antimony ores.
Advantages of Lead Nitrate
**Lead nitrate is used to activate sphalerite, similar to Copper Sulphate.
**Lead Nitrate is also the most widely used chemical as an accelerator in cynadation of precious metals.
**Adding lead nitrate to the pre-leach circuit increases gold recovery.
** In Several studies it has been presented that addition of lead solution for example lead nitrate, Pb(NO3)2, is able to enhance gold leaching kinetics.
Deschênes and Prud’homme (1997) have presented that lead nitrate can act in different ways.
**They observed that lead nitrate can activate the surface of a passivated gold particle, prevent a passivation film formation on the gold surface and also precipitate the soluble sulphides.
*** Kondos et al. (1995) have presented that sulphide mineral, which is distributed in the solution, will be precipitated by excess lead as PbS. Lead ion may also react with gold sulfide film making the passive gold particle to become active again in the absence of sulfide formation
*** effect of lead ions in the form of lead nitrate, lead sulfide and lead sulfite, which are reacted with gold and accelerate gold dissolution
*** sulfide ion concentration is decreased fast with the addition of lead ions.
*** It may enhance gold leaching from ores by continually removing the leached species from the solution, redistributing the solid/liquid equilibrium and favoring further gold dissolution.
*** addition of lead nitrate does not affect cyanide consumption.
*** addition of lead nitrate together with oxygen provides the most effective gold extraction.
***** also presented that higher concentrations of lead nitrate can reduce gold extraction****
- Lead (II) nitrate preparation
Lead (II) nitrate is prepared by mixing 12.5 kg into 200 litres drum of water. Lead nitrate activate the surface of a passivated gold particle and prevent a passivation film formation by sulphide minerals on the gold surface by forming gold-lead alloys on the surface of gold. Sulphide minerals or layers are precipitated by excess lead as PbS and through the reaction of Lead ions with gold sulphide films, and these make the passive gold particle to become active again in the absence of sulfide formation and these accelerate the dissolution of gold.
The dosage of Lead (II) nitrate /Pb(NO4) goes up to 200g/t. Above 200g/t the dissolution rate of gold reduced due to the formation of Pb(OH) which forms a passive layer on gold surface. A dosage of 250ml/min is also used.
The PH ranges from 8.5 to 9.0. Lead nitrate works for Gold ores which contains sulphides such as pyrite ores.
Lead nitrate is also used in other applications such as:
- medical astringent;
- tanning material for leather-making;
- dyeing mordant;
- photograph promoting agent;
- flotation for ore;
- chemical reagents; and also used for making fireworks, match, and other lead salts.
- Transport-UN UN 1469
- Hazard Class No. :5.1 Oxidizing Agent
- Packing Group: II
- HS Code: 28332950
2- STORAGE & HANDLING & HANDLING
Store in a cool, dry, well ventilated place and out of direct sunlight. Store away from foodstuffs. Store away from incompatible materials . Keep containers closed when not in use - check regularly for spills.
25kg PP/PE bags
Environmental considerations - Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). Remove trapped material with suction hoses. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
5. Download our Lead nitrate msds for more safety and handling information.