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Method for leaching silver from oxidized manganese-silver ores difficult to dress and smelt

A manganese-silver ore, oxidation-type technology, 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: 2015-04-29
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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PUM

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Abstract

The invention relates to the technical field of mineral substance processing, and particularly relates to a method for leaching silver from oxidized manganese-silver ores difficult to dress and smelt. The method comprises the following steps: 1, crushing the manganese-silver ores, and carrying out coarse grinding on the obtained object, so that manganese-silver ore powder is obtained; 2, uniformly mixing the manganese-silver ore powder with a reductant in a mass rate of 1:2-4, so that an ore sample is obtained for standby application; 3, carrying out wet separation: reacting the ore sample prepared in the step 2 with sulfuric acid in a ratio of 1 g: 3-5 ml, and stirring constantly, and after solids and liquid are fully contacted, carrying out water bath reaction accompanied by occasional stirring for 2 hours at a water bath temperature of 80-90 DEG C, so that slurry is obtained for standby application; 4, carrying out solid-liquid separation: carrying out centrifugal separation on the slurry prepared in the step 3, and washing 1-2 times; and filtering and separating centrifugalized mother liquor by using fine filter paper, so that residues are obtained; and 5, extracting silver by cyanidation: leaching silver from the residues by using a sodium cyanide solution. According to the invention, the cyanide leaching rate of silver can be greatly improved while manganese is reduced and separated.

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 Applications(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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