Method for gradient separation and comprehensive recovery of gold concentrate containing carbon and arsenic

A technology for gold concentrate and carbon concentrate, which is applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of decarburization, poor dearsenic boiling effect, and gold leaching rate from re-wrapping of gold particles, and achieves good results. Environmental benefits, friendly operation environment, simple process and technical conditions

Active Publication Date: 2021-12-07
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]According to the deficiencies in the prior art above, the object of the present invention is to provide a method for the comprehensive recovery of cascade separation of carbon-containing arsenic-gold concentrate, which overcomes the two-stage boiling In the process of roasting furnace to process carbon-arsenic gold concentrate, the decarburization and de-arsenic boiling effect is not good, the gold particles are re-wrapped during the roasting process, and the gold leaching rate is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) First-stage pre-flotation decarburization: mix the carbon-containing arsenic-containing gold concentrate with the two-stage roasting cyanide tailings, the mass ratio is 1:0.1, adjust the pulp concentration to 10%, adjust the pH to 9 with lime, and use the amount of sodium sulfite 500g / t, the amount of kerosene is 50g / t, after stirring for 10 minutes, add 2# oil 50g / t, stirring for 3 minutes, flotation time 10 minutes, using the first roughing, second sweeping and three times fine flotation process, scraping The foam produced is carbon concentrate, and the main components of carbon concentrate are 10% carbon, 50g / t gold, 300g / t silver, 3% sulfur, 5% lead, 3% copper, and 0.30% arsenic; The product in the tank is carbon beneficiation tailings, containing 0.2% carbon, 20g / t gold, 10g / t silver, 0.1% lead, 0.1% copper, 20% sulfur and 3% arsenic;

[0028] 2) Gold and silver extraction by high-concentration cyanide leaching of carbon concentrate: put the carbon concentrate i...

Embodiment 2

[0034] 1) First-stage pre-flotation decarburization: mix the carbon-containing arsenic-containing gold concentrate with the two-stage roasting cyanide tailings, the mass ratio is 1:0.3, adjust the pulp concentration to 15%, use lime to adjust the pH to 10, and the amount of sodium sulfite 1250g / t, kerosene dosage 175g / t, after stirring for 20 minutes, add 2# oil 125g / t, stirring for 4 minutes, flotation time of 25 minutes, using one roughing, two sweeping, three fine flotation process, scraping The froth is carbon concentrate, and the main components of carbon concentrate are 25% carbon, 125g / t gold, 450g / t silver, 5.5% sulfur, 6.5% lead, 4% copper, and 0.65% arsenic; The product in the tank is carbon beneficiation tailings, containing 0.3% carbon, 35g / t gold, 20g / t silver, 0.25% lead, 0.2% copper, 30% sulfur and 9% arsenic;

[0035] 2) Gold and silver extraction by high-concentration cyanidation leaching of carbon concentrate: put the carbon concentrate described in step 1) i...

Embodiment 3

[0041] 1) First-stage pre-flotation decarburization: mix the carbon-containing arsenic-containing gold concentrate with the two-stage roasting cyanide tailings, the mass ratio is 1:0.5, adjust the pulp concentration to 19%, use lime to adjust the pH to 11, and the amount of sodium sulfite 2000g / t, kerosene dosage 300g / t, after stirring for 30 minutes, add 2# oil 200g / t, stirring for 5 minutes, flotation time 40 minutes, using one roughing, two sweeping, three fine flotation processes, scraping The foam is carbon concentrate, and the main components of carbon concentrate are 40% carbon, 200g / t gold, 600g / t silver, 8% sulfur, 8% lead, 5% copper, and 1.00% arsenic. Carry out the next step of processing; the product in the tank is carbon tailings, containing 0.4% carbon, 50g / t gold, 30g / t silver, 0.4% lead, 0.3% copper, 40% sulfur, and 15% arsenic .

[0042] 2) Gold and silver extraction by high-concentration cyanide leaching of carbon concentrate: put the carbon concentrate desc...

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Abstract

The invention belongs to the technical field of gold dressing and smelting, and relates to a method for gradient separation and comprehensive recovery of gold concentrate containing carbon and arsenic. A flotation technology and a smelting technology are effectively combined for pre-flotation of the gold concentrate containing carbon and arsenic, the obtained carbon concentrate is independently cyanided to extract gold, silver and copper, the gold, silver and copper in the carbon concentrate are comprehensively recycled, the influence of carbon minerals on roasting and the influence of subsequent cyaniding on gold recycling are eliminated, and carbon concentrate leaching residues are subjected to non-waste comprehensive treatment through a nonferrous smelting production process. By effectively combining low-temperature arsenic removal, acid leaching treatment and high-temperature desulfurization of the carbon separation tailings, through granulation, low-temperature reduction roasting, fine grinding of cinder and an acid leaching process, the defects are overcome that in a conventional two-stage roasting process, arsenic minerals are not roasted completely and gold is wrapped by metal oxides and sulfides, so that the gold is exposed to the maximum extent, the leaching rates of gold and silver in the cyaniding process is remarkably improved, and economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of gold dressing and smelting, and in particular relates to a method for stepwise separation and comprehensive recovery of carbon-arsenic-containing gold concentrate. Background technique [0002] With the massive exploitation of mineral resources in the world, the treatment of easy-to-handle gold ore resources continues to decrease, and refractory gold ore has become an important raw material for gold extraction in all countries in the world. Refractory gold ore accounts for as much as 60% of the total gold in the earth's crust. . Therefore, the research on the technology of extracting gold from refractory gold ores has attracted the attention of countries all over the world, and the research on the rational and efficient development and utilization technology of refractory gold ores has always been a hot spot in the research of gold-producing countries in the world. [0003] The prospective reserves of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08C22B1/06C22B3/08C22B3/46C22B30/04C25C1/12C22B15/00
CPCC22B11/04C22B11/08C22B1/06C22B3/08C22B15/0071C22B30/04C22B3/46C25C1/12Y02P10/20
Inventor 郭建东朱德兵
Owner SHANDONG GUODA GOLD
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