CN101748285A - Refined gold ore cyaniding and leaching process - Google Patents
Refined gold ore cyaniding and leaching process Download PDFInfo
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- CN101748285A CN101748285A CN200810240057A CN200810240057A CN101748285A CN 101748285 A CN101748285 A CN 101748285A CN 200810240057 A CN200810240057 A CN 200810240057A CN 200810240057 A CN200810240057 A CN 200810240057A CN 101748285 A CN101748285 A CN 101748285A
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Abstract
The invention relates to a refined gold ore cyaniding and leaching process. The refined gold ore cyaniding and leaching process comprises the following: (1) regrinding and size mixing are carried out on refined gold ore which is reclaimed through flotation; (2) concentration processing is carried out on refined ore powder which is ground in a fine manner in the step (1); (3) ore pulp is fed into an ultrasonic cyaniding and leaching system after the concentration processing in the step (2), oxygen dissolving, [CN-] and pH value of the ore pulp are controlled during the leaching reaction; (4) deoxidizing replacement is carried out on leached pregnant solution to obtain gold mud for smelting, an ultrasonic leaching groove in the leaching process is renovated on the basis of the original leaching groove, and an ultrasonic device adopts the interval using manner. The process not only can greatly shorten the leaching time, but also can increase the leaching efficiency of vulcanized gold ore difficult for dipping; moreover, the process only needs equipment renovation on the present basis, and is particularly suitable for expansion and production increasing renovation of old factories.
Description
Technical field
The present invention relates to a kind of novel process of utilizing ultrasonic wave to improve the refined gold ore cyaniding leaching efficiency, especially handle the difficult gold ore that leaches, extraction time is short, and speed is fast, the efficient height; And only need on original basis, to append new equipment, need not redesign construction, be applicable to that also the enlarging volume increase of old factory is transformed.
Background technology
The treatment process of tradition sulfuration gold mine is ore reduction, ore grinding, flotation, flotation concentrate hydrogenation leaching.This technology is to the specification of quality strictness of flotation concentrate, to low-grade gold ore and superfine parcel gold exist the treatment time long, energy consumption is high, the sodium cyanide usage quantity is big, environmental pollution heavy, metal recovery rate is low and shortcoming such as poor product quality, is not suitable for handling the ore of the type.In the explored gold trisulfide Mineral resources of China, some soaks the sulfuration gold mine for low-grade refractory, adopts existing conventional art exploitation, and economic benefit is extremely low.And difficulty is transformed in traditional leaching method enlarging volume increase.Therefore, be necessary to provide a kind of novel process
Summary of the invention
The purpose of this invention is to provide a kind of refined gold ore cyaniding and leaching process,, this technological reaction speed is fast, and novel process does not need from new design and construction, only needs on original basis stirred leaching tank to be transformed, and increases new controller switching equipment.
For reaching above-mentioned goal of the invention, the present invention by the following technical solutions:
This refined gold ore cyaniding and leaching process is characterized in that: it may further comprise the steps:
(1) gold ore of floatation recovery is regrinded and is sized mixing;
(2) fine ore after the fine grinding in (1) is carried out concentration;
(3) ore pulp after the concentration in (2) is sent into the ultrasonic wave cyaniding and leach system, leach the dissolved oxygen, [CN of control ore pulp in the reaction process
-] and the pH value;
(4) your liquid after leaching obtains the gold mud that can be used for smelting through the deoxidation displacement.
Described ultrasonic frequency is 24-30kHz, sound intensity 0.8-1.0W/cm
3, ultrasonic unit can adopt intermittently use-pattern.
Advantage of the present invention is: novel process is by introducing ultrasonication in original cyaniding and leaching process, by hyperacoustic high pressure concussion effect, smash the film that mineral surface generates, the micro-crack of cleaning mineral surface, defective etc., make mineral surface keep high activity, the reinforcing mass transfer effect, fast reaction speed makes sodium cyanide give birth to reaction with golden hair faster; Novel process does not need from new design and construction, only needs on original basis stirred leaching tank to be transformed, and increases new controller switching equipment.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Fig. 2 changes for improved stirred leaching tank equipment synoptic diagram
Among Fig. 1, shown in the Grinding procedure 1, the Gold Concentrate under Normal Pressure that flotation is reclaimed is carried out ore grinding thinning processing (containing the reagent removal process), so that the mineral disaggregation degree satisfies the subsequent treatment requirement; Adding simultaneously calcium oxide sizes mixing;
Shown in the solid-liquid separation process 2, the Gold Concentrate under Normal Pressure after the fine grinding is after Separation of Solid and Liquid, and ore grinding water returns Grinding procedure and uses for ore grinding; Thin concentrate enters leaching system;
Ultrasonic wave leaches shown in the operation 3, and the thin concentrate after the Separation of Solid and Liquid enters ultrasonic wave leaching system, carries out intensified by ultrasonic wave and leaches processing; Monitor pH, temperature and dissolved oxygen in each leaching tanks in the leaching process, and suitably adjust according to monitored data, this leaching system can adopt two sections continuous series systems.
Shown in solid-liquid separation process 4, the washing 5, the ore pulp after the leaching is realized Separation of Solid and Liquid through operations such as thickening filtrations; Concentrate overflow and filtrate and all enter your liquid pool, soak slag and enter Tailings Dam after washing and relevant treatment, a cleaning solution part is returned the leaching operation, and your liquid pool is a part enter.
Shown in deoxidation step 6, the displacement 7, the liquid in your liquid pool is after deoxidation and zinc dust precipitation operation, and tail washings returns the leaching operation through washing. Gold mud can be sent to the smeltery and smelt.
In leaching process, in stirred leaching tank, generator riding position, usage quantity and concussion time at intermittence determine that according to test stirred leaching tank 11 is transformed schematic diagrames and seen Fig. 2 with supersonic generator 13 fixed in position, and among the figure, 12 is paddle.
Gold content＞10g/t in the above-described Gold Concentrate under Normal Pressure, the mog of Gold Concentrate under Normal Pressure is 90%-0.043mm, the Cymag consumption is 1.5Kg/t, the pulp density of leaching is 50% (2: 1 volume ratio of liquid-solid ratio), the leaching time is 8h, gold leaching rate＞95%, gold concentration＞5g/m in the leachate3。
Embodiment
The invention will be further described below in conjunction with concrete embodiment.
Embodiment 1
This novel process is applied to certain sulfuration gold mine.The Qinghai arsenic-bearing gold ore is the strong alteration ore of the clay mineral that dyes based on iron, chlorite, sericite, metalliferous mineral in the ore mainly is mispickel, pyrite, melnikovite, limonite, wherein most of sulfide is very easily cracked because of alteration, cracked back granularity superfine (＜30 μ m).Gold mainly is present in mispickel, pyrite, melnikovite and the limonite with the submicroscopic state, because the grain size number of sulfide of load gold own is very thin, contained Jin Zegeng is thin, is difficult to see the gold of separate state under the mirror.An oxide mineral part of carrying gold is in addition dyed the form diafiltration in the gangue based on clay mineral with iron, and the entrained gold of this part oxide mineral will be difficult to reclaim, and therefore, it is all bigger that difficulty is leached in this ore floatation and cyaniding, belongs to refractory gold ore.The resulting flotation concentrate index of this gold mine: gold grade 12.67g/t, gold recovery 82.17%.
(1) as shown in Figure 1, the raw ore of mining obtains gold sulphide concentrate through operations such as broken grinding flotations.The gold ore granularity is thicker, for reaching desired particle size, with the gold ore processing of regrinding.
(2) according to the size-grade distribution situation and the ore grinding testing data of gold ore, make gold ore reach the granularity requirements of 90%-0.038mm, add calcium oxide simultaneously and size mixing, make the pH value 11～12 of ore pulp.
(3) gold ore after levigate enters thickener and concentrates, and the gold ore operation of regrinding is returned in concentrated overflow, and concentrated underflow enters ultrasonic wave and leaches system.
(4) thin concentrate enters the ultrasonic stirring leaching vat, and the ore pulp after 2 grades of series connection air agitation leach is sent into thickener and concentrated.In the ultrasonic stirring leaching process, pulp density remains on 50% (liquid-solid ratio 2: 1), and the sodium cyanide add-on is about 1.5Kg/t, and (frequency of ultrasonic is 24-30kHz, sound intensity 0.8-1.0W/cm to keep every 60min to open ultrasonic unit concussion 10min
3), stir 8h altogether, monitor [CN in slurry pH, ore pulp dissolved oxygen amount, slurry temperature and the ore pulp simultaneously
-] parameters such as concentration.
Because noise intensity was bigger when ultrasonic wave was opened, and need carry out sound-absorbing noise abatement measure, guarantee personnel safety.
(5) leach ore pulp after thickener concentrates, your liquid pool overflow enters, and underflow enters pressure filter.
(6) filter cake of pressure filter production is sent into the tailings area after washing, and your liquid pool filtrate partly returns, and part is returned the leaching system and leached usefulness.
(8) after the concentration in your liquid pool reaches requirement, obtain gold mud through the deoxidation displacement and send smelting, the displacement tail washings returns and is used for washing.
Effect of the present invention is: reduce the Cymag consumption, reduce toxic wastewater processing cost and pollution, shorten the Gold ore leaching time, improve Gold ore leaching efficient, open up the new treatment process of Gold Concentrate under Normal Pressure, reduce the cost that Gold Concentrate under Normal Pressure enlarging volume increase is transformed.
Claims (5)
1. refined gold ore cyaniding and leaching process, it is characterized in that: it may further comprise the steps:
(1), the gold ore of floatation recovery is regrinded and is sized mixing;
(2), the fine ore after the fine grinding in (1) is carried out concentration;
(3), the ore pulp after the concentration in (2) is sent into the ultrasonic wave cyaniding leaches system, dissolved oxygen, [CN-] and the pH value of control ore pulp in the leaching reaction process;
(4), your liquid after leaching obtains the gold mud that can be used for smelting through the deoxidation displacement.
2. gold ore ultrasonic wave cyaniding leaching novel technique according to claim 1 is characterized in that: in the described ultrasonic wave cyaniding leaching system, frequency of ultrasonic is 24-30kHz, sound intensity 0.8-1.0W/cm
3
3. gold ore ultrasonic wave cyaniding leaching novel technique according to claim 1 and 2 is characterized in that: ultrasonic unit adopts intermittently use-pattern.
4. gold ore ultrasonic wave cyaniding leaching novel technique according to claim 1 and 2 is characterized in that: described gold ore is after fine grinding, and the granularity of its ore grinding satisfies the granularity requirements of 90%-0.038mm
5. gold ore ultrasonic wave cyaniding leaching novel technique according to claim 1 and 2 is characterized in that: extraction time is 8h altogether.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810240057A CN101748285A (en) | 2008-12-17 | 2008-12-17 | Refined gold ore cyaniding and leaching process |
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| CN200810240057A CN101748285A (en) | 2008-12-17 | 2008-12-17 | Refined gold ore cyaniding and leaching process |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535180A (en) * | 2012-02-11 | 2012-07-04 | 东华大学 | Method utilizing ultrasonic for size mixing |
| CN102912116A (en) * | 2012-11-07 | 2013-02-06 | 灵宝金源矿业股份有限公司 | Smelting residue flash magnetizing roast comprehensive recycling technology |
| CN104131160A (en) * | 2014-08-01 | 2014-11-05 | 昆明理工大学 | Ultrasonic intensified leaching method for refractory gold ores and ultrasonic intensified gold leaching stirrer |
| CN106167853A (en) * | 2016-08-24 | 2016-11-30 | 铜仁市万山区盛和矿业有限责任公司 | A kind of ultrasonic extraction process of gold |
| CN106350670A (en) * | 2016-08-24 | 2017-01-25 | 铜仁市万山区盛和矿业有限责任公司 | Treatment process of pyrrhotite |
| CN107684972A (en) * | 2016-08-05 | 2018-02-13 | 北京有色金属研究总院 | A kind of more ore deposits of step further utilization mutually carry the group technology of Results of Gold in Auriferous Ore Samples |
| CN108277360A (en) * | 2018-03-30 | 2018-07-13 | 陕西科技大学 | A method of using the ultrasonic combined processing of Fenton-containing golden tailing |
| CN113718111A (en) * | 2021-08-26 | 2021-11-30 | 昆明理工大学 | Method for extracting gold by using ultrasonic cooperation of bromide |
| CN113718112A (en) * | 2021-09-13 | 2021-11-30 | 昆明理工大学 | Method for pre-oxidizing refractory high-sulfur gold ore by ultrasonic activation of persulfate |
-
2008
- 2008-12-17 CN CN200810240057A patent/CN101748285A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535180A (en) * | 2012-02-11 | 2012-07-04 | 东华大学 | Method utilizing ultrasonic for size mixing |
| CN102912116A (en) * | 2012-11-07 | 2013-02-06 | 灵宝金源矿业股份有限公司 | Smelting residue flash magnetizing roast comprehensive recycling technology |
| CN102912116B (en) * | 2012-11-07 | 2015-03-11 | 灵宝金源矿业股份有限公司 | Smelting residue flash magnetizing roast comprehensive recycling technology |
| CN104131160A (en) * | 2014-08-01 | 2014-11-05 | 昆明理工大学 | Ultrasonic intensified leaching method for refractory gold ores and ultrasonic intensified gold leaching stirrer |
| CN104131160B (en) * | 2014-08-01 | 2016-05-11 | 昆明理工大学 | The method of the ultrasound-enhanced leaching of a kind of Refractory Au-ores and ultrasound-enhancedly soak golden agitator |
| CN107684972A (en) * | 2016-08-05 | 2018-02-13 | 北京有色金属研究总院 | A kind of more ore deposits of step further utilization mutually carry the group technology of Results of Gold in Auriferous Ore Samples |
| CN106167853A (en) * | 2016-08-24 | 2016-11-30 | 铜仁市万山区盛和矿业有限责任公司 | A kind of ultrasonic extraction process of gold |
| CN106350670A (en) * | 2016-08-24 | 2017-01-25 | 铜仁市万山区盛和矿业有限责任公司 | Treatment process of pyrrhotite |
| CN108277360A (en) * | 2018-03-30 | 2018-07-13 | 陕西科技大学 | A method of using the ultrasonic combined processing of Fenton-containing golden tailing |
| CN108277360B (en) * | 2018-03-30 | 2023-05-05 | 陕西科技大学 | Method for treating gold-containing tailings by Fenton-ultrasonic wave combination |
| CN113718111A (en) * | 2021-08-26 | 2021-11-30 | 昆明理工大学 | Method for extracting gold by using ultrasonic cooperation of bromide |
| CN113718112A (en) * | 2021-09-13 | 2021-11-30 | 昆明理工大学 | Method for pre-oxidizing refractory high-sulfur gold ore by ultrasonic activation of persulfate |
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Open date: 20100623 |