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Method for recovering lost gold-loaded carbon from tailings obtained in carbon leaching gold extraction process

A gold-loaded carbon and carbon leaching technology, which is applied in the field of mineral processing engineering, can solve the problems of gold loss, wear resistance, and loss, and achieve the effects of easy production, good recovery effect, and low chemical consumption

Inactive Publication Date: 2012-06-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above leaching and adsorption process, because the activated carbon is brittle and not resistant to wear, a small amount of fine carbon powder that has adsorbed gold will be produced after aerated or mechanical stirring. Usually, this part of carbon powder will be directly lost in the slurry when the pulp is filtered and concentrated. In the tailings, causing the loss of gold

Method used

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  • Method for recovering lost gold-loaded carbon from tailings obtained in carbon leaching gold extraction process
  • Method for recovering lost gold-loaded carbon from tailings obtained in carbon leaching gold extraction process

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The tailings of Huaniushan carbon leaching gold extraction process in Guazhou, Gansu contain 0.88% organic carbon and 0.49 g / t gold. The main minerals in the tailings are pyrrhotite and pyrite, and the gangue minerals are quartz, Fluorite, calcite and hornblende, etc. After sieving the tailings with a 100-mesh sieve to remove large particles and debris, the particle size is -200 mesh, accounting for 85%, adding water to adjust the slurry concentration to 35%, adding sodium carbonate to adjust the pH value to 8, adding kerosene 400 g / t, pine oil 50g / t, carry out rough selection of floating carbon; after rough selection of powdered gold-loaded carbon, add kerosene 100 g / t, pine oil 20g / t to carry out floating carbon sweeping; roughing and sweeping foam are combined for two second choice The foam is the gold-loaded carbon coarse concentrate, and the middle ore of the selection Ⅰ returns to the roughing, and the selection The medium ore is returned to beneficiation I f...

Embodiment 2

[0018] The tailings of the carbon leaching gold extraction process in Yantai Gold Smelter, Shandong Province contain 0.97% organic carbon and 0.65 g / t gold. The main minerals in the tailings are pyrrhotite and arsenopyrite, and the gangue minerals are Quartz, calcite, etc. Screen the tailings with a 100-mesh sieve to remove large particles and debris. The particle size is -200 mesh, accounting for 93%. Add water to adjust the slurry concentration to 30%, add sodium carbonate to adjust the pH value to 7.5, and add kerosene 300 g / t , pine oil 30g / t, carry out floating carbon roughing; after roughing out gold-loaded carbon, add kerosene 200 g / t, pine oil 25g / t into the slurry to carry out floating carbon sweeping; roughing and sweeping foam are combined for two second choice The foam is the gold-loaded carbon coarse concentrate, and the middle ore of the selection Ⅰ returns to the roughing, and the selection The medium ore is returned to beneficiation I for recycling treatmen...

Embodiment 3

[0020] The tailings of Ulaga Gold Mine in Heilongjiang contain 1.52% organic carbon and 6.0 g / t gold in the carbon leaching gold extraction process. The main metal minerals in the tailings are pyrite, and the gangue minerals are mica, quartz and some mud. quality minerals. After sieving the tailings with a 100-mesh sieve to remove large particles and debris, the particle size is -200 mesh, accounting for 95%, adding water to adjust the slurry concentration to 40%, adding sodium carbonate to adjust the pH value to 8, adding kerosene 600 g / t, pine oil 40g / t, carry out rough selection of floating carbon; after coarse selection of powdered gold-loaded carbon, add 300 g / t of kerosene and 30 g / t of pine oil to carry out floating carbon sweeping; roughing and sweeping foam are combined and carried out two picks, picks The foam is the gold-loaded carbon coarse concentrate, and the middle ore of the selection Ⅰ returns to the roughing, and the selection The middle ore in the middl...

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Abstract

The invention discloses a method for recovering lost gold-loaded carbon from tailings obtained in a carbon leaching gold extraction process, which is a flotation recovery technology of powder gold-loaded carbon and belongs to the technical field of mineral processing engineering. According to the invention, kerosene is used as a collecting agent to carry out flotation on carbon matter; and after the tailings produced in the carbon leaching gold extraction process is subjected to size mixing, the kerosene is used for carrying out flotation and enrichment on the powder gold-loaded carbon. The method is utilized to recover the gold-loaded carbon lost in the tailings. The method has simple process and high recovery rate and is easy to operate. The loss of gold can be greatly reduced.

Description

technical field [0001] The invention relates to a method for recovering lost gold-loaded carbon from tailings in a gold extraction process by carbon leaching, and belongs to the field of mineral processing engineering. Background technique [0002] At present, the carbon leaching gold extraction process is one of the main methods for gold ore treatment, and it is widely used. The feature of the process is that the gold-bearing minerals in the ore are leached by cyanide to form a water-soluble gold-cyanide complex. After the ore slurry is placed in a series of adsorption tanks and fully contacted with granular activated carbon after stirring, the gold-cyanide complex ions are adsorbed to the On activated carbon, the gold-loaded carbon is further processed to recover gold. In the above-mentioned leaching and adsorption process, because the activated carbon is brittle and fragile, it is not resistant to wear, and a small amount of fine carbon powder that has adsorbed gold will...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B11/00B03D1/006
CPCY02P10/20
Inventor 谢海云周平庄故章高利坤刘殿文刘畅姜亚雄
Owner KUNMING UNIV OF SCI & TECH
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