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Comprehensive recovery for bullion ore with various metals

A recovery method and polymetallic technology, applied to silver and polymetallic, low-temperature chlorine-sulfur oxidation pretreatment, can solve the problems of comprehensive recovery of polymetallic gold and silver ore, long leaching time, equipment corrosion, etc., and achieve obvious economic benefits and environmental benefits, strong mineral adaptability, and fast leaching speed

Inactive Publication Date: 2006-08-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN90103384.7 discloses " chlorinated body chlorination leaching gold and silver " though has solved cyanide, mercury pollution problem, is not suitable for high carbon, high sulfur, high arsenic containing polymetallic gold and silver ore, leaching gold needs It is carried out in a strong acid solution, which is corrosive to the equipment, and the leaching time is long (24 hours), and the efficiency is low
[0005] The technologies disclosed in AU8425022A, US4662938, GB2154221A and CN87103312A are all different from the recovery method of the present invention, and cannot solve the comprehensive recovery of high-sulfur, high-carbon, high-arsenic polymetallic gold and silver ore

Method used

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  • Comprehensive recovery for bullion ore with various metals

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Take 30Kg of high-carbon and high-sulfur gold concentrate powder, add 4.5Kg of solid NaCl (about 15%), stir and mix, put it into a continuous rotary kiln, heat to 350°C, and keep it warm for 3.5 hours for pretreatment. Immerse the sand in a solution of 20% NaCl and 11% sodium hypochlorite at a solid-liquid ratio of 1:4, add 10Kg / ton of cyanuric acid (about 0.36Kg) according to the weight of the calcined sand, stir and leach for 6 hours, and then filter and wash to form Precious liquid and leaching slag, the leaching slag is discharged into the tailings pond, the precious liquid passes through the C410 resin exchange column at a flow rate of less than 100ml / min to adsorb gold and silver to form gold-loaded, silver-laden resin and sub-column liquid, thereby separating gold, silver and polymetallic separate. Use 3% thiourea to elute the gold-silver resin to form a gold-silver liquid. The volume ratio of the eluent to the gold-silver resin is 30:1. NaOH is added to the gold...

Embodiment 2

[0030] The material is a high-carbon and high-sulfur silver concentrate. Take 30Kg of the material and add 6Kg of solid NaCl (about 20%) to stir and mix it, then put it into a continuous rotary kiln and heat it to 350°C for 4 hours. The calcine is mixed according to the ratio of solid to liquid 1:6, the NaCl concentration of the leaching solution is 20%, the concentration of sodium hypochlorite is 13%, and 15 kg / ton (about 0.54 kg) of cyanuric acid is added according to the weight of the calcine, stirred and leached for 8 hours, filtered Washing, leaching slag enters the tailings pond. The immersion liquid enters the multi-metal recovery process, and the flow rate is controlled below 100mL / min to absorb gold and silver through the C410 resin adsorption column. Cu, Pb, Zn, and Fe are in the effluent, thereby separating them from Au and Ag. The gold-loaded resin was eluted with 3% thiourea, and the volume ratio of the eluent to the gold-silver resin was 30:1. NaOH was added to t...

Embodiment 3

[0035] Material is the calcined sand after oxidation roasting, gets 30Kg material and puts into stirring tank, immerses in the solution that contains 5%NaCl and 12% sodium hypochlorite, makes solid-liquid ratio be 1: 5, adds cyanuric acid 8kg / ton by calcined sand weight ( about 0.28Kg), stirred and leached for 6 hours, filtered and washed, the leached slag was put into the tailings pond, the leached liquid was adsorbed by the C410 resin adsorption column to absorb gold and silver, the flow rate was controlled below 100mL / min, Cu, Pb, Zn, Fe were in the effluent, Separated from Au and Ag. The gold-silver loaded resin was eluted with 3% thiourea, the volume ratio of the eluent to the gold-silver loaded resin was 30:1, NaOH was added to the eluent to make the pH = 11, and a hydroxide precipitate was formed, which was filtered and washed , add 1:1 aqua regia to the gold and silver precipitate to dissolve until transparent, add sodium chloride until the black silver chloride precip...

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Abstract

The invention opened a recovery method for the polymetallic bullion ore of high sulphur, carbon and arsenic. It solves the problem of extracting gold interfering by the sulphur and carbon. The chlorination extracting system is proper not only to sulfide mineral but also to the polymetallic accompanying mineral. Also it can recovery the accompanying metal less than 8h, so it has improved the extracting ratio. The process is easy to do and low cost.

Description

technical field [0001] The invention relates to a pretreatment process, leaching process and polymetallic comprehensive recovery process for high-sulfur, high-carbon or high-arsenic polymetallic gold-silver ore, especially through low-temperature chlorine-sulfur oxidation pretreatment to obtain gold, silver and polymetallic. Background technique [0002] The existing gold and silver ore pretreatment technologies include: Oxidation roasting: air roasting and oxygen-enriched roasting are usually carried out at 600°C to 900°C. Oxidation roasting method is the earliest pretreatment method, with mature technology and high reliability , but the adaptability is limited by the type of deposit or metallogenic material, and sometimes the recovery rate of associated metals is low, especially silver. Roasting for sulfur and arsenic fixation: Sodium carbonate, calcium oxide or calcium hydroxide can be added to mix with the ore sample and then roasted. The sulfur and arsenic will be conv...

Claims

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Application Information

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IPC IPC(8): C22B3/00C22B3/04C22B3/24C22B1/08C22B11/06
CPCY02P10/20
Inventor 李滦宁崔玉果陈民友
Owner JILIN UNIV
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