Method for extracting base and precious metals by a pre- treatment that leads to solubilisation of the refractory matrices thereof

A method for extracting precious metals by a treatment conducive to the solubilization of their refractory matrices, wherein in case of an extraction of gold and platinum L free in oxidized matrices, the method uses NaCN, the method comprising the steps of:

• crushing the gold and platinum L free in oxidized matrices to sizes of 2.5 cm, wherein if gold and platinum L free in oxidized matrices contains clay, the crushing step is to a particle size of 5 cm;
• adding a lime to the crushed gold and platinum L free in oxidized matrices until obtaining a homogeneous mixture with a pH >11;
• agglomerating the homogeneous mixture to form a glomer
• adding a solid reactant to the glomer;
• depositing the glomer into a leach pad to form a cell;
• resting the cell between 5 to 10 days;
• and
• irrigating after resting by spraying with refining solutions to extract the gold in a cyanide solution.

A method for extracting base metals and precious metals by a treatment conducive to the solubilization of their refractory matrices, wherein in the case of the extraction of free gold particles in oxidized matrices, NaCl used and the method comprising the steps of:

• crushing the free gold particles in oxidized matrices to sizes of 2.5 cm, wherein if the free gold particles in oxidized matrices contains clay, the reduction in size is to a particle size of 5 cm;
• adding a lime to the crushed gold until obtaining a homogeneous mixture with a pH >11;
• agglomerating the homogenous mixture to form a glomer
• adding solid Nacl reagent to the glomer;
• depositing the glomer into a leach pad to form a cell;
• resting the cell from 10 to 15 days;
• and
• irrigating after resting to spraying with refining solutions to extract the gold in a chlorinated solution.

A method for extracting base and precious metals by a pre-treatment conducive to the solubilization of their refractory matrices, wherein in the case of an extraction of gold particles encapsulated in sulfide grains (pyrite, arsenopyrite or other sulfide) contained in silicated matrices, NaCl is used, the method comprising the steps of:

• crushing the gold particles encapsulated in sulfide grains to a particle size of 2.5 cm, wherein if the gold particles encapsulated in sulfide grain contains clay, the size reduction is to 5 cm;
• adding a lime to the crushed gold until obtaining a homogeneous mixture with a pH >11;
• agglomerating the homogenous mixture to form a glomer
• adding a solid Nacl reagent to the glomer;
• depositing the glomer into a leach pad to form a cell;
• resting the cell between 20 to 30 days;
• and
• irrigating after resting by sprayed with refining solutions to extract the gold in a chlorinated solution.

Method for extracting base and precious metals by a pre-treatment conducive to the solubilization of their refractory matrices, wherein in case of the extraction of gold particles encapsulated in sulfide grains (pyrite, arsenopyrite or other sulfide) contained in silicated matrices, NaCl and NaCN are used, the method comprising the steps of:

• crushing the gold particles encapsulated in sulfide grain to a particle size of 2.5 cm, wherein the gold particles contain clay, the size reduction is to 5 cm;
• adding a lime to the crushed gold until obtaining a homogeneous mixture with a pH >11;
• agglomerating the homogeneous mixture to form a glomer;
• adding a solid Nacl to the glomer
• adding Nacn to the product of the previous step;
• depositing the glomer into a leach pad to form a cell;
• resting the cell between 15 to 20 days;
• and
• irrigating after resting by spraying with refining solutions to extract the gold in an aqueous solution.

A method for extracting base and precious metals by a pre-treatment conducive to the solubilization of their refractory matrices, wherein in the case of the extraction of cobalt and iron minerals, the method comprising the steps:

• crushing the mineral (Carroite, Cobaltite, Spherocobaltite, heterogenite and variants, Wustite, hematite, Magnetite, Nichelite) to a particle size distribution between 2.5 and 5 centimeters;
• mixing the crushed mineral with a solid active agent (Nacl) to form an homogenous mixture;
• agglomerating the homogeneous mixture by adding water to form a glomer whose moisture can range from 5 to 8%;
• deposited the glomer into a pad to form a cell;
• resting the cell between 20 and 60 days;
• and
• irrigating the cell by aqueous washing to extract the mineral.

A method for extracting base and precious metals by a pre-treatment conducive to the solubilization of their refractory matrices, wherein in the case of an extraction of Lithium (extendable to extract Na, K, B and Mg) mineral, the method comprises the steps of:

• crushing the mineral (Espoduore, Lepidoptera litiphyllite, petalite and variants) to a particle size distribution between 2.5 and 5 centimeters;
• mixing the crushed mineral with a solid active agent (Nacl) to form a homogeneous mixture;
• agglomerating the homogeneous mixture by adding water to form a glomer whose moisture ranging from 3 to 5%;
• depositing the glomer into a pad to form a cell;
• resting the cell between 5 and 15 days;
• and
• irrigating the cell With water to extract the mineral in a rich solution.