CN104232908A - Method for recovering gold from gold-containing mercury smelting tailings - Google Patents
Method for recovering gold from gold-containing mercury smelting tailings Download PDFInfo
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- CN104232908A CN104232908A CN201410474306.0A CN201410474306A CN104232908A CN 104232908 A CN104232908 A CN 104232908A CN 201410474306 A CN201410474306 A CN 201410474306A CN 104232908 A CN104232908 A CN 104232908A
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Abstract
The invention discloses a method for recovering gold from gold-containing mercury smelting tailings. Firstly, grinding the mercury-making tailings by using a ball mill until the fineness is-74 mu m and accounts for more than 90 percent, then putting the ground mercury-making tailings into a leaching tank, adding a gold dissolving agent A, B and C into the leaching tank, stirring and leaching for 24 hours, dissolving bare gold in the tailings, and recovering gold in an ore pulp solution by using a carbon pulp method; and continuously feeding the tailing slurry after gold leaching into a flotation system, adding an activating agent D for activation, then adding flotation agents E and F, and recovering gold wrapped by sulfide ores in the form of gold concentrate. The method has the advantages of high gold recovery rate, energy consumption saving, no environmental pollution and the like, and is particularly suitable for environment-friendly recovery of gold from gold-containing tailings, gold-containing materials and semi-oxidized semi-vulcanized gold ores which can not obtain better recovery effect in cyanidation and flotation.
Description
Technical field
The invention belongs to technical field of beneficiation, relate to a kind of from containing the method reclaiming gold gold refining mercury tailings, be specifically applicable to be oxidized semicure Types of Gold from half of high alkalinity or reclaim gold containing golden tailings or gold-bearing material.
Background technology
There is much large-scale mercury ore mountain in valley district, Yunnan-Guizhou of China, and the mine tailing after refining mercury is stored up in a large number, wherein much refines mercury mine tailings, makes roasting carry the Gold grade of the tailings after mercury higher, be about 2g/t due to the cracks such as the sulfide in raw ore or trapping gold.But this kind of ore often containing a large amount of calcium carbonate and magnesium carbonate mineral, is transformed into calcium oxide magnesium strong basicity mineral, causes tailings to be strong basicity after roasting.Because maturing temperature is lower, sulphide ores in raw ore only has partial oxidation, also has a large amount of sulphide ores trapping gold not to be destroyed, and leaches gold extracting method and can only leach the exposed gold of Extraction parts, this part trapping gold cannot adopt leaching method to extract, and method for floating can only be adopted to reclaim.Because the golden method of common leaching all uses extraction of gold by cyanidation, this is just extremely unfavorable to follow-up flotation operation: prussiate is not only hypertoxic, and is the strongly inhibited agent of sulphide ores, directly to cause in follow-up flotation sulphide ores can not emersion; In addition, due to the strong basicity of tailings, under so high pulp alkalinity (pH > 12), exist even without prussiate, sulphide ores also can be subject to strongly inhibited, is difficult to floatation recovery.
In view of above reason, the type that river, Yunnan-Guizhou one is with is always not ideal containing the synthetical recovery situation of the gold of gold refining mercury mine tailings.The selected gold grade of major part is after the tailings of 2g/t adopts " Cyanide Leaching-method for floating " to process, and can only reclaim the gold of about 60%, the gold of the 0.8g/t that also has an appointment is lost in Tailings Dam with tailings discharging.And prussiate medicament has severe toxicity, contaminate environment.
Therefore, for the type containing golden tailings, seek the ore dressing recovery method of a kind of high-efficient simple, environmentally safe, significant to the comprehensive reutilization containing gold refining mercury mine tailings, be a problem needing solution badly.
Summary of the invention
The present invention aims to provide a kind of method reclaiming gold, and object is to reclaim the gold containing in gold refining mercury mine tailings, and the method can improve the rate of recovery of gold in refining mercury mine tailings effectively.
The present invention is achieved through the following technical solutions:
From containing the method reclaiming gold gold refining mercury tailings, comprise reclaiming and leach exposed gold stage and sulphide ores trapping gold stage,
Wherein leach the exposed gold stage of reclaiming in tailings, concrete steps are:
A. will carry out ore grinding containing gold refining mercury tailings ball mill, ore milling concentration is 50 ~ 60%, and grinding fineness is-74 μm and accounts for 90%;
B. the ore pulp after milled is entered leaching vat, adjustment pulp density is 40 ~ 45%, and in leaching vat, adds combination medicament A, B and C, agitation leach, and the time length is 18 ~ 24 hours;
C. adopt the method for activated carbon absorption-desorption-electrodeposition, reclaim the gold be dissolved in ore pulp;
Continue the floatation recovery sulphide ores trapping gold stage after wherein utilizing the ore pulp activation after leaching gold, concrete steps are:
D. the ore pulp after the process of leaching-carbon adsorption enters floatation system, is introduced into 1
#surge tank, adjusts to 25-30% by pulp density, then adds activator D, and stirs, and ensures that ore pulp is 1
#the residence time in surge tank was at 15 ~ 20 minutes;
E. ore pulp is from 1
#out continue afterwards in surge tank to enter 2
#surge tank, 2
#add flotation agent E and F in surge tank, and stir, ensure that ore pulp is 2
#the residence time in surge tank was at 10 ~ 15 minutes;
F.2
#surge tank size mixing after ore pulp enter flotation unit, flotation flowsheet structure be one section roughly select, two sections selected, two sections scan, obtain gold floatation concentrate.
Described medicament A is calcium peroxide, and consumption is 1000 ~ 3000 grams/ton, and medicament B is Losantin, add-on is 1000 ~ 3000 grams/ton, medicament C is sulfonated humic acid sodium, and add-on is 500 ~ 1000 grams/ton, and the quality proportioning of medicament A, B and C is: A:B:C=2 ~ 3:2 ~ 3:1.
Described activator D is made up of ammonium sulfate and ammonium thiosulfate, and the weight ratio of ammonium sulfate and ammonium thiosulfate is 1:1 ~ 1:5, and consumption is 1000 ~ 3000 grams/ton;
The powerful collecting agent of the one that described flotation agent E is made up of allyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol, wherein the weight ratio of propyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol is 60:35:5, and consumption is 50-300 gram/ton.
Described flotation agent F is 11
#oil, consumption is 10 ~ 30 grams/ton.
Beneficial effect of the present invention is:
1) application combination medicament A, B and C are as the golden agent of leaching, the hypertoxic prussiate applied when instead of the golden operation of conventional leaching;
2) by the application of combination medicament A, B and C, when eliminating follow-up flotation operation, prussiate is to the restraining effect of sulphide ores;
3) by the application of activator D, alleviate the suppression of highly basic degree to sulphide ores during follow-up flotation operation, add the floated activity of sulphide ores.
Accompanying drawing explanation
Fig. 1 is from refining the schema reclaiming gold mercury mine tailings containing gold for of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described further, the following stated, only to preferred embodiment of the present invention, not do other forms of restriction to the present invention, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed to the Equivalent embodiments of equal change.Everyly do not depart from the present invention program's content, according to technical spirit of the present invention to any simple modification made for any of the above embodiments or equivalent variations, all drop in protection scope of the present invention.
Embodiment 1
Adopt method of the present invention, containing gold refining mercury tailings, the small-sized flow test in golden recovery experiment room has been carried out to certain mine, has achieved good sorting index.
Certain mine is containing gold grade 2.13g/t, the sulphur grade 2.01% of gold refining mercury tailings.This tailings is owing to creating a large amount of calcium oxide magnesium material during roasting in early stage, basicity is higher, and pH reaches 13-14, and the disseminated grain size of gold is comparatively thin, and the gold accounting for 50% ore deposit that cures wrapped up.
As shown in Figure 1, first raw ore (namely refining mercury tailings) is accounted for 90% by grinding of ball grinder to-74 μm, add water the ore pulp of milled adjustment, makes leaching operation pulp density be 40%; Add A+B+C and combine leaching agent, institute's dosage: calcium peroxide 2000g/t, Losantin 2000g/t, sulfonated humic acid sodium 800g/t; Extraction time is after 24 hours, and sampling analysis soaks slag gold grade.Ore pulp after leaching, after charcoal absorption process, enters floatation system.
The adjustment concentration that added water by ore pulp after leaching is 25% carry out floatation recovery sulfuration gold mine, and first add activator D and activate, activator D is made up of ammonium sulfate and ammonium thiosulfate, and the weight ratio of ammonium sulfate and ammonium thiosulfate is 1:3, soak time 20 minutes; Flotation flowsheet structure is: roughly select one section, scans two sections, selected two sections; Use XFD type list groove flotation 3 liters, 1 liter, 0.75 liter, 0.5 liter in the closed circuit flotation of open-circuit condition Imitating; Dosing is adjusted in closed circuit process, is final dose with dose during quantity and quality balance, institute's dosage: D2000g/t; Roughly select institute's dosage: E80g/t, F30g/t; Scan I dosage: E30g/t, F10g/t; Scan I dosage: E30g/t, F10g/t, wherein the powerful collecting agent of the one that is made up of allyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol of E, the weight ratio of propyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol is 60:35:5, F is 11
#oil.
The closed circuit flow test technical indicator of laboratory room small-sized is: leaching slag gold grade is 1.06g/t, and leaching yield is 50.23%; Gold floatation concentrate gold grade is 21.36g/t, productive rate 3.20%, the rate of recovery 64.56%, flotation tailings gold grade 0.39g/t.The total yield of gold reaches 82.36%.
Embodiment 2
Certain sulphur plant fires the tailings after sulphur containing golden 1.62g/t, sulphur grade 3.4%.This tailings is the tailings produced after firing sulphur with sulfurous iron ore, except containing except gold, also have containing have an appointment 20% magnetite, the disseminated grain size of gold is comparatively thin, and the gold of about 30% ore deposit that cures wrapped up.
As shown in Figure 1, first raw ore (i.e. tailings) is accounted for 90% by grinding of ball grinder to-74 μm, add water the ore pulp of milled adjustment, makes leaching operation pulp density be 45%; Add A+B+C and combine leaching agent, institute's dosage: calcium peroxide 1500g/t, Losantin 1500g/t, sulfonated humic acid sodium 600g/t; Extraction time is after 24 hours, and sampling analysis soaks slag gold grade.Ore pulp after leaching, after charcoal absorption process, enters floatation system.
The adjustment concentration that added water by ore pulp after leaching is 30% carry out floatation recovery sulfuration gold mine, and first add activator D and activate, activator D is made up of ammonium sulfate and ammonium thiosulfate, and the weight ratio of ammonium sulfate and ammonium thiosulfate is 1:1, soak time 20 minutes; Flotation flowsheet structure is: roughly select one section, scans two sections, selected two sections; Use XFD type list groove flotation 3 liters, 1 liter, 0.75 liter, 0.5 liter in the closed circuit flotation of open-circuit condition Imitating; Dosing is adjusted in closed circuit process, is final dose with dose during quantity and quality balance, institute's dosage: D1500g/t; Roughly select institute's dosage: E60g/t, F30g/t; Scan I dosage: E30g/t, F15g/t; Scan I dosage: E30g/t, F15g/t, wherein the powerful collecting agent of the one that is made up of allyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol of E, the weight ratio of propyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol is 60:35:5, F is 11
#oil.
The closed circuit flow test technical indicator of laboratory room small-sized is: leaching slag gold grade is 0.58g/t, and leaching yield is 64.20%; Gold floatation concentrate gold grade is 18.94g/t, productive rate 1.91%, the rate of recovery 62.48%, flotation tailings gold grade 0.22g/t.The total yield of gold reaches 86.57%.
Embodiment 3
Certain half oxidation half primary ore, containing golden 1.95g/t, sulphur grade 1.64%.This Gold in Ores belongs to mineral based on limonite, rhombohedral iron ore, a small amount of chalcopyrite and pyrite; Gangue mineral is potassium felspar sand, quartz etc. mainly.Rock-mineral determination shows, the disseminated grain size of gold is comparatively thin, and the gold accounting for 50% ore deposit that cures wrapped up.
As shown in Figure 1, first raw ore is accounted for 90% by grinding of ball grinder to-74 μm, add water the ore pulp of milled adjustment, makes leaching operation pulp density be 40%; Add A+B+C and combine leaching agent, institute's dosage: calcium peroxide 1500g/t, Losantin 1500g/t, sulfonated humic acid sodium 600g/t; Extraction time is after 24 hours, and sampling analysis soaks slag gold grade.Ore pulp after leaching, after charcoal absorption process, enters floatation system.
The adjustment concentration that added water by ore pulp after leaching is 25% carry out floatation recovery sulfuration gold mine, and first add activator D and activate, activator D is made up of ammonium sulfate and ammonium thiosulfate, and the weight ratio of ammonium sulfate and ammonium thiosulfate is 1:5, soak time 15 minutes; Flotation flowsheet structure is: roughly select one section, scans two sections, selected two sections; Use XFD type list groove flotation 3 liters, 1 liter, 0.75 liter, 0.5 liter in the closed circuit flotation of open-circuit condition Imitating; Dosing is adjusted in closed circuit process, is final dose with dose during quantity and quality balance, institute's dosage: D1500g/t; Roughly select institute's dosage: E60g/t, F30g/t; Scan I dosage: E30g/t, F15g/t; Scan I dosage: E30g/t, F15g/t, wherein the powerful collecting agent of the one that is made up of allyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol of E, the weight ratio of propyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol is 60:35:5, F is 11
#oil.
The closed circuit flow test technical indicator of laboratory room small-sized is: leaching slag gold grade is 0.82g/t, and leaching yield is 57.95%; Gold floatation concentrate gold grade is 38.45g/t, productive rate 3.99%, the rate of recovery 78.74%, flotation tailings gold grade 0.18g/t.The total yield of gold reaches 90.85%.
Claims (5)
1., from refining the method reclaiming gold mercury tailings containing gold, it is characterized in that comprising following steps:
1) will carry out ore grinding containing gold refining mercury tailings ball mill, ore milling concentration is 50 ~ 60%, and grinding fineness is-74 μm and accounts for 90%;
2) ore pulp after milled is entered leaching vat, adjustment pulp density is 40 ~ 45%, and in leaching vat, adds combination medicament A, B and C, agitation leach, and the time length is 18 ~ 24 hours;
3) adopt the method for activated carbon absorption-desorption-electrodeposition, reclaim the gold be dissolved in ore pulp;
4) ore pulp after the process of leaching-carbon adsorption enters floatation system, is introduced into 1
#surge tank, adjusts to 25-30% by pulp density, then adds activator D, and stirs, and ensures that ore pulp is 1
#the residence time in surge tank was at 15 ~ 20 minutes;
5) ore pulp is from 1
#out continue afterwards in surge tank to enter 2
#surge tank, 2
#add flotation agent E and F in surge tank, and stir, ensure that ore pulp is 2
#the residence time in surge tank was at 10 ~ 15 minutes;
6) 2
#surge tank size mixing after ore pulp enter flotation unit, flotation flowsheet structure be one section roughly select, two sections selected, two sections scan, obtain gold floatation concentrate.
2. according to claim 1 a kind of from refining the method reclaiming gold mercury tailings containing gold, it is characterized in that: described medicament A is calcium peroxide, consumption is 1000 ~ 3000 grams/ton, medicament B is Losantin, add-on is 1000 ~ 3000 grams/ton, medicament C is sulfonated humic acid sodium, and add-on is 500 ~ 1000 grams/ton, and the quality proportioning of medicament A, B and C is: A:B:C=2 ~ 3:2 ~ 3:1.
3. according to claim 1 a kind of from refining the method reclaiming gold mercury tailings containing gold, it is characterized in that: described activator D is made up of ammonium sulfate and ammonium thiosulfate, and the weight ratio of ammonium sulfate and ammonium thiosulfate is 1:1 ~ 1:5, consumption is 1000 ~ 3000 grams/ton.
4. according to claim 1 a kind of from refining the method reclaiming gold mercury tailings containing gold, it is characterized in that: the powerful collecting agent of the one that described flotation agent E is made up of allyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol, wherein the weight ratio of propyl group thiourethane, isobutyl Sodium Aerofloat and propyl carbinol is 60:35:5, and consumption is 50 ~ 300 grams/ton.
5. according to claim 1 a kind of from containing the method reclaiming gold gold refining mercury tailings, it is characterized in that: described flotation agent F is 11
#oil, consumption is 10 ~ 30 grams/ton.
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Cited By (5)
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| CN110292990A (en) * | 2019-07-11 | 2019-10-01 | 河南省岩石矿物测试中心 | Method for improving gold recovery rate and beneficiation efficiency |
| CN111054524A (en) * | 2019-12-30 | 2020-04-24 | 北京矿冶科技集团有限公司 | Gold flotation auxiliary collecting agent and flotation method thereof |
| CN113755695A (en) * | 2021-08-11 | 2021-12-07 | 昆明理工大学 | Enrichment recovery of gold (Au (S) in thiosulfate solution2O3)23-) of (b) |
| CN114214516A (en) * | 2021-10-15 | 2022-03-22 | 贵州锦丰矿业有限公司 | Method for improving carbon leaching recovery rate of high-mercury gold ore |
| CN114807608A (en) * | 2022-04-07 | 2022-07-29 | 西安建筑科技大学 | Method for recovering gold from high-sulfur gold separation tailings |
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| CN114807608B (en) * | 2022-04-07 | 2023-09-29 | 西安建筑科技大学 | Method for recovering gold from high-sulfur gold-separating tailings |
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