Mineral Leaching

Mineral leaching

We manufacture lead nitrate for mineral leaching. This is the process to extract a species of interest, such as gold (Au) and silver (Ag) through chemicals substances that dissolve them.

Benefits of Lead Nitrate for the mineral leaching process in mining:

Lead Nitrate

Increases the gold and silver dissolution speed during cyanidation, avoiding mineral passivation.
Reduces the use of cyanide.
Fights the cyanicide effects of minerals such as sulfurs.

We can supply lead nitrate quickly and timely to USA, Canada, Central America, Europe, etc.

Lead nitrate available products

1 ton superbags

25 kg bags

Specifications:

Formula: Pb(NO3)2
Physical description: White crystals
CAS No.: 10099-74-8
Packaging: Superbag
Qty. per package: 1,000 kg

Characteristics:

Purity: 99% min.
Insoluble Materials: 0.20 % max
Humidity: 1.0% max.
Copper: 20 ppm max
Iron: 20 ppm max.

Characteristics and Advantages of the Leaching Process using Cyanide and Lead Nitrate

Characteristics

Metals are dissolved in an alkaline cyanide solution.
The most commonly used oxidant is air oxygen.
Types: Tank leaching and Heap leaching.

Advantages

Stable gold and silver compounds are formed.
High-efficiency dissolution of gold and silver.
Lower cost compared to other technologies (thiourea, thiosulfate, etc.)
Lead nitrate use counteracts the negative effects of sulfides in the system.

Mineral Leaching Process

Reagent diffusion on the mineral surface

Reagent adsorption on the mineral surface

Chemical reactions between minerals and reagents

Separation of reaction products on the mineral surface

Diffusion of soluble products in the solution

Lead Nitrate Use Best Practices

Prepare a lead nitrate solution (4-10%).
If possible, use process water low in sulfates and carbonates to prevent lead precipitation.
Do not manipulate the product unless you have read and understood all safety precautions.

Always use the indicated PPE.
Keep the product under lock, always in compliance with storage conditions.
Eliminate the contents and/or containers in compliance with the regulations for hazardous wastes, containers, and residues.

Frequent Questions

What are the final products of this process?

A Gold (Au) and Silver (Au) pregnant solution is obtained.

During which leaching process stage is lead nitrate used?

This compound is used when cyanided is added, or during the pre-treatment stage.

What is the recommended lead nitrate dose for leaching?

According to references, 50-500 ppm.

Where do you ship this product?

Our plant is located in Mexico, and we ship it to all the world. We have customers in USA, Canada, Central and South America.

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