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A method for leaching silver from refractory oxidized manganese-silver ore

A manganese-silver ore and oxidation-type technology, which is applied in the field of mineral processing, can solve problems such as failure to achieve a wide range of applications, and achieve the effect of improving the cyanide leaching rate

Active Publication Date: 2016-09-14
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] While the above-mentioned patented method has advantages, it also has certain deficiencies, and has not been able to achieve a wide range of applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method for leaching silver from the oxidized manganese-silver ore described in the present embodiment comprises the following steps:

[0021] 1. Sample preparation: crush and roughly grind the manganese-silver ore to make manganese-silver ore powder for later use;

[0022] 2. Sample mixing: Weigh 200g of manganese-silver ore powder, mix the manganese-silver ore powder and ferrous sulfate according to the mass ratio of 1:2-4, and prepare the ore sample for later use;

[0023] 3. Wet separation: react the mineral sample prepared in step 2 with sulfuric acid according to the solid-liquid ratio of 1g: 3ml~5ml, add 1000mL of 2.5mol / L sulfuric acid to react, and at the same time, keep stirring to make the solid-liquid fully contact Finally, carry out the water bath reaction with occasional stirring, the water bath temperature is 80-90 ° C, the reaction time is 2 hours, and the slurry is prepared for use;

[0024] 4. Solid-liquid separation: centrifuge the slurry prepared...

Embodiment 2

[0028] The method for leaching silver from the oxidized manganese-silver ore described in the present embodiment comprises the following steps:

[0029] 1. Sample preparation: crush and roughly grind the manganese-silver ore to make manganese-silver ore powder for later use;

[0030] 2. Sample mixing: Weigh 200g of manganese-silver ore powder, mix the manganese-silver ore powder and ferrous sulfate according to the mass ratio of 1:2-4, and prepare the ore sample for later use;

[0031] 3. Wet separation: the mineral sample prepared in step 2 and sulfuric acid are mixed according to the solid-liquid ratio of 1g: 3ml~5ml, and 800mL of 3mol / L sulfuric acid is added to react, and at the same time, keep stirring to make the solid-liquid fully contact , carry out water bath reaction with occasional stirring, the water bath temperature is 80-90 ° C, the reaction time is 2 hours, and the prepared slurry is ready for use;

[0032] 4. Solid-liquid separation: centrifuge the slurry prep...

Embodiment 3

[0036] The method for leaching silver from the oxidized manganese-silver ore described in the present embodiment comprises the following steps:

[0037] 1. Sample preparation: crush and roughly grind the manganese-silver ore to make manganese-silver ore powder for later use;

[0038] 2. Sample mixing: Weigh 200g of manganese-silver ore powder, mix the manganese-silver ore powder and ferrous sulfate according to the mass ratio of 1:2-4, and prepare the ore sample for later use;

[0039] 3. Wet separation: react the mineral sample prepared in step 2 with sulfuric acid according to the solid-liquid ratio of 1g: 3ml~5ml, add 600mL of 4mol / L sulfuric acid to react, and at the same time, keep stirring to make the solid-liquid fully contact , carry out water bath reaction with occasional stirring, the water bath temperature is 80-90 ° C, the reaction time is 2 hours, and the prepared slurry is ready for use;

[0040] 4. Solid-liquid separation: centrifuge the slurry prepared in step...

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Abstract

The invention relates to the technical field of mineral processing, in particular to a method for leaching silver from refractory oxidized manganese silver ore. The method includes the following steps: 1. Crushing and coarsely grinding the manganese-silver ore to produce manganese-silver ore powder; 2. Mixing the manganese-silver ore powder and reducing agent evenly according to the mass ratio of 1:2-4 to obtain the ore sample Standby; 3. Wet separation: react the ore sample prepared in step 2 with sulfuric acid according to the ratio of solid-liquid ratio of 1g:3ml~5ml. With occasional stirring, the temperature of the water bath is 80-90°C, and the reaction time is 2 hours, and the slurry is prepared for use; 4. Solid-liquid separation: the slurry prepared in step 3 is centrifuged and washed 1-2 times; Filter and separate the centrifuged mother liquor with fine filter paper to obtain a residue; 5. Silver extraction by cyanide: use sodium cyanide solution to leach silver from the residue. The invention can greatly increase the cyanidation leaching rate of silver while reducing and separating manganese.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for leaching silver from refractory oxidized manganese silver ore. Background technique [0002] Silver-containing manganese ore is usually called manganese-silver ore, which contains tens to several kilograms of silver per ton of raw ore, and is an important type of silver ore resource in my country. This type of manganese-silver ore is accompanied by a small amount of lead, zinc, iron and other metal minerals. Among them, the main mineral containing manganese is pyrolusite, and there are also a small amount of manganese ore, manganese ore, ferromanganese ore and brown manganese ore. The occurrence forms of silver in this type of ore mainly include: ①distributed in the crystal lattice of manganese ore in the form of isomorphism; It exists in the form of independent silver minerals such as horn silver ore, native silver or argentite. These occurrence forms a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/08
Inventor 顾汉念温汉捷王宁赵成东杜胜江田元江
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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