CN107604160A - A kind of handling process of high-carbon difficult-treating gold mine - Google Patents
A kind of handling process of high-carbon difficult-treating gold mine Download PDFInfo
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- CN107604160A CN107604160A CN201711011263.2A CN201711011263A CN107604160A CN 107604160 A CN107604160 A CN 107604160A CN 201711011263 A CN201711011263 A CN 201711011263A CN 107604160 A CN107604160 A CN 107604160A
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Abstract
The present invention relates to a kind of handling process of high-carbon difficult-treating gold mine, is carried out as follows with condition：Pre-acidified, Gold Concentrate under Normal Pressure is sized mixing, add sulfuric acid and carry out pre-acidified, pre-acidified groove is connected for three grooves, connects installation foam isolating device on the chute between each groove, blowing air, stoking oil in No. 1 groove acidization, 2nd, No. 3 grooves add 2# oil, blowing air, control acidifying endpoint pH, per the 1h of groove acidificatoin time 0.5, stirring linear velocity 4 5m/s in groove；Dividing plate separation isolates portion's foam and collected to storage tank press filtration pack at chute, obtains high-carbon gold mine and bottom ore pulp；Hot-pressure oxidation, bottom ore pulp enter autoclave and carry out hot-pressure oxidation, and control temperature, partial pressure of oxygen, liquid consolidates and the reaction time；Solid-liquor separation, hot-pressure oxidation bottom ore pulp is subjected to solid-liquor separation, obtains oxidizing slag and oxidation solution；Carbon-impregnated cyaniding, lime is added to oxidizing slag, adjusts pH value, adds activated carbon, carried out CIL and carry gold, it can effectively reclaim the comprehensive recovery of bubble in acidifying groove, gold cyanide and gold, have the advantages that technique is brief, easily operated, environmentally friendly.
Description
Technical field
The present invention relates to a kind of handling process of high-carbon difficult-treating gold mine, suitable for high-carbon difficult-treating gold mine application.
Background technology
Professional thinks, high-carbon difficult-treating gold mine refer to organic carbon containing 1-10%, 1-5% DICs and 6-22% sulphur and
Difficult golden (essence) ore deposit of the tiny ore deposit parcel that cures of gold grain.
The type gold (essence) ore deposit is multiple difficult-treating gold mine, and gold grain is fine and the thing parcel that cures, direct cyaniding are basic
Gold can not be soaked, even if destroying the sulfide of parcel by conventional ore grinding or oxidation means, it is also difficult to gold grain is obtained completely
Exposure, also also contain a large amount of organic carbons in ore, and organic carbon can produce " robbing gold " effect during cyanide gold-leaching, so that
The recovering effect of gold more deteriorates.
Wrapping up sulfide the ore of gold at present mainly has three kinds of roasting oxidation, biological oxidation and pressure oxidation processing works
Skill:Roasting technique is traditional handicraft, is decomposed sulfide-oxidation by high-temperature roasting, so that gold exposure, then soaked by cyaniding
Go out recovery gold, the golden rate of recovery is typically 90~96%, but roasting technique produces substantial amounts of acid, and such ore typically contains
Arsenic, and the difficult control of environment.Biological oxidation is a kind of oxidation technology more friendly to environment, and gold side is carried in difficult-treating gold mine oxidation
Face is also more and more applied, but its shortcoming is oxidation cycle length, and poor to ore adaptability, oxidation is not thorough enough, and can not
Solve the influence of carbonaceous " robbing gold ", therefore, be not suitable for such gold ore.Pressure oxidation is current processing sulfide parcel gold mine
Maximally effective technique, its aoxidize thoroughly, high-efficiency environment friendly, can handle and contain arsenic ore, to microfine wrap up gold mine have it is good
Treatment effect, due to containing DIC in ore, it is necessary to be removed in advance before autoclave is entered, acid caused by pressurization can be back to use pre-
In acidizing process, but when organic carbon content in ore is high, golden effect is robbed so occurring in pressurization and cyaniding process, is caused
Gold recovery reduces.
To solve the above problems, Chinese Patent Application No. CN201010614426.8 is disclosed, " one kind is containing arsenic, carbon containing low product
Position gold extraction process of refractory gold ore ", it is more for argillaceous mineral, the big difficult-treating gold mine of fine ore amount after crushing, first by original
Ore deposit is crushed to 10~-30mm, then ore is sieved or washed by 1~-2mm sub-sieve separates fine ore from ore,
Obtained fine ore is used for gold floatation concentrate, and+2mm ore direct leaching in dumps carries out biological oxidation, the ore after biological oxidation is passed through
Cyanide Leaching is directly carried out after the change of medium such as pickling, washing, alkali cleaning and carries gold, the Gold Concentrate under Normal Pressure floatingly selected uses biological oxidation-cyanogen
The leaching of change charcoal, pressure oxidation-cyanidation gold-extracted or roasting oxidation are cyanidation gold-extracted, but the technique can not improve the rate of recovery of gold.It is Chinese special
Sharp application number CN201010545048.2 also discloses " a kind of extraction of gold process of high-carbon pozzuolite Gold Concentrate under Normal Pressure ", and the technique includes ore grinding
Classification, biological oxidation, pressure oxidation, separation of solid and liquid, cyanidation gold-extracted five steps, belong to biology and hydrometallurgical processes class, first
The sulfide moiety for making parcel gold using biological oxidation technique aoxidizes, and recycles pressure oxidation technique exhaustive oxidation sulfide parcel
Gold, gold is finally carried using cyanide carbon pulp or zinc replacement, due to not handling high-carbon, caused during pressure oxidation
Carbon can occur and rob golden effect, reduce gold leaching rate, so the technique can not improve the rate of recovery of gold.
A kind of high-carbon difficult-treating gold mine handling process is researched and developed for this and just seems particularly urgent.
The content of the invention
The task of the present invention is in order to which solve the multiple difficult-treating gold mine such as high organic carbon, high-sulfur puies forward golden problem, there is provided one
The handling process of kind high-carbon difficult-treating gold mine.
The task of the present invention is completed by the following technical programs：
A kind of high-carbon difficult-treating gold mine handling process, carried out as follows with condition successively：
A. pre-acidified, Gold Concentrate under Normal Pressure 1 is sized mixing to pulp density 15-20%, adds sulfuric acid and carry out pre-acidified, pre-acidified groove is
Three grooves are connected, and connect installation foam isolating device on the chute between each groove, air aeration quantity 6- is passed through in No. 1 groove acidization
8Nm3/ (㎡ h), addition 5~15g/t of kerosene dosage, 2, No. 3 grooves add 2# oil 10~20g/t of dosage, are passed through air aeration quantity 4-
6Nm3/ (㎡ h), acidifying endpoint pH is controlled to 1~2, per groove acidificatoin time 0.5-1h, stirring linear velocity 4-5m/s in groove；
Dividing plate separation isolates portion's foam and collected to storage tank press filtration-pack at chute, obtains high-carbon gold mine and bottom ore pulp；
B. hot-pressure oxidation, bottom ore pulp enter autoclave and carry out hot-pressure oxidation, 180~240 DEG C of temperature of control, partial pressure of oxygen 0.3
~1.0MPa, liquid-solid ratio 3~8,1~4h of reaction time；
C. solid-liquor separation, hot-pressure oxidation bottom ore pulp is subjected to solid-liquor separation, obtains oxidizing slag and oxidation solution；
D. carbon-impregnated cyaniding, lime is added to oxidizing slag, regulation pH value to 9.5-10, adds activated carbon content 20-40g/L,
It is cyanidation gold-extracted to carry out carbon-impregnated, obtains gold loaded carbon.
The percentage being related in specification is mass percent.
CIL (Carbon In Leach) extract technology, i.e. carbon-in-leach process carry gold, are that one kind adds activated carbon simultaneously into ore pulp
Carry out leaching the technological process with ADSORPTION OF GOLD simultaneously.
/ t represents dry mine weight per ton.
The present invention has advantages below and effect compared with prior art：
The present invention because by being passed through air into the pre-acidified groove that pressurizes and adding the decarburization medicament such as kerosene and 2# oil,
Bubble in acidifying groove can be effectively reclaimed, obtains high organic carbon Gold Concentrate under Normal Pressure；Simultaneously because into golden (essence) ore deposit of hot-pressure oxidation process
Phosphorus content reduce, so can both improve cyaniding gold recovery, the comprehensive recovery (1-5%) of gold can be improved again；Additionally due to
Do not lie in and change existing equipment, so technique is brief, it is easily operated, it is environmentally friendly.
Brief description of the drawings
Fig. 1 is according to a kind of process chart of high-carbon difficult-treating gold mine handling process proposed by the present invention.
Each sign represents respectively in accompanying drawing：
1. the high-carbon gold mine of 7. oxidation solution of the kerosene 3.2# of Gold Concentrate under Normal Pressure 2. oil 4. air, 5. sulfuric acid, 6. oxidizing slags 8.
Explanation is described in further detail below in conjunction with accompanying drawing.
Embodiment
As shown in figure 1, a kind of high-carbon difficult-treating gold mine handling process of the present invention, successively by following processing step and condition
Carry out：
A. pre-acidified, Gold Concentrate under Normal Pressure 1 is sized mixing to pulp density 15-20%, adds sulfuric acid 5 and carry out pre-acidified, pre-acidified groove
Connected for three grooves, connect installation foam isolating device on the chute between each groove, the aeration quantity of air 4 is passed through in No. 1 groove acidization
6-8Nm3/ (㎡ h), the addition 5~15g/t of dosage of kerosene 2,2, No. 3 grooves add 2# 3 10~20g/t of dosage of oil, are passed through air 4 and fill
Tolerance 4-6Nm3/ (㎡ h), acidifying endpoint pH is controlled to 1~2, per groove acidificatoin time 0.5-1h, stirring linear velocity 4- in groove
5m/s, at chute dividing plate separation isolate portion's foam and collect to storage tank press filtration-pack, obtain high-carbon gold mine 8 and bottom ore pulp；
B. hot-pressure oxidation, bottom ore pulp enter autoclave and carry out hot-pressure oxidation, 180~240 DEG C of temperature of control, partial pressure of oxygen 0.3
~1.0MPa, liquid-solid ratio 3~8,1~4h of reaction time；
C. solid-liquor separation, hot-pressure oxidation bottom ore pulp is subjected to solid-liquor separation, obtains oxidizing slag 6 and oxidation solution 7；
D. carbon-impregnated cyaniding, lime is added to oxidizing slag 6, regulation pH value to 9.5-10, adds activated carbon content 20-40g/L,
It is cyanidation gold-extracted to carry out carbon-impregnated, obtains gold loaded carbon.
The technique of the present invention may furthermore is that：
The return to step A of oxidation solution 7 of the step C is used, can twice laid and the dosage of reduction sulfuric acid 5.
Embodiment 1
Certain carbonaceous Gold Concentrate under Normal Pressure 1 contains golden 25g/t, organic carbon 3.8%, sulphur 16%, and gold is wrapped in vulcanization in microfine disseminated
In thing, direct cyaniding gold leaching rate is contrasted less than 15%, carbon-impregnated cyaniding gold leaching rate about 24%；Contrast uses conventional pressure oxidation
Carbon-impregnated cyaniding after 220 DEG C, 1 hour, gold leaching rate 88%.
The concrete operation step and technological parameter that this example uses are as follows：
(1) pre-acidified, certain carbonaceous Gold Concentrate under Normal Pressure 1 is sized mixing to pulp density 15-20%, adds sulfuric acid 5 and carry out pre-acidified,
Air aeration quantity 7Nm is passed through in No. 1 acidifying groove3/ (㎡ h), addition kerosene dosage 10g/t；2nd, No. 3 grooves are passed through air aeration quantity
5Nm3/ (㎡ h), addition 2# oil dosages 15g/t；Acidifying endpoint pH is controlled to 1~2, per groove acidificatoin time 0.5-1h, in groove
Stir linear velocity 4-5m/s, at chute dividing plate separation isolate portion's foam and collect to storage tank press filtration-pack, obtain high-carbon gold mine
Yield 18%, organic carbon content 13%, stockpiling is outer to sell, bottom ore pulp gold mine organic carbon content 1.8%；
(2) hot-pressure oxidation, bottom ore pulp is adjusted to concentration 18%, in 210 DEG C, partial pressure of oxygen 0.7MPa of temperature, oxygen inflation
Pipe extends multiple spot annular in shape below agitating paddle and added, and stirs linear velocity 4.5m/s, controls residence time 2h；
(3) solid-liquor separation, oxidizing slag 6 and oxidation solution 7 are obtained；
(4) CIL carries gold, adds lime to oxidizing slag 6, regulation pH value to 9.5-10, carries out CIL and carry gold, add activated carbon
Dosage controls 30g/L, time 24h, obtains gold loaded carbon.
The example can still obtain gold leaching rate 95% when Gold Concentrate under Normal Pressure contains organic carbon 3.8%.
Embodiment 2
Certain carbonaceous gold ore 1 contains golden 30g/t, and organic carbon 5.6%, DIC 3%, sulphur 22%, gold is in microfine disseminated bag
It is rolled in sulfide, contrasts direct cyaniding gold leaching rate less than 8%, carbon-impregnated cyaniding gold leaching rate about 15%；Contrast is matched somebody with somebody with raw ore
Carbon-impregnated cyaniding after 220 DEG C, 1 hour of conventional pressure oxidation, gold leaching rate 86% are carried out after ore deposit.
The concrete operation step and technological parameter that this example uses are as follows：
Certain Gold Concentrate under Normal Pressure 1 is containing golden 30g/t, organic carbon 5.6%, DIC 3%, sulphur 22%, and raw ore is containing golden 5g/t, organic carbon
1%th, sulphur 3%, with the composite ore that golden 24.7g/t, organic carbon 4.6%, sulphur 18% are obtained after ore deposit.
(1) pre-acidified, composite ore is sized mixing to pulp density 20%, adds sulfuric acid 5 and carry out pre-acidified, groove is acidified at No. 1
In be passed through air, aeration quantity 8Nm3/ (㎡ h), addition kerosene dosage 15g/t；2nd, No. 3 grooves are passed through air, aeration quantity 6Nm3/
(㎡ h), 2# oil dosage 20g/t are added, acidifying endpoint pH is controlled to 1~2, per groove acidificatoin time 0.5-1h, stirred in groove
Linear velocity 4-5m/s, at chute dividing plate separation isolate portion's foam and collect to storage tank press filtration-pack；High-carbon gold mine 8 is obtained to produce
Rate 20%, organic carbon content 15%, stockpiling is outer to sell, bottom ore pulp gold mine organic carbon content 2%；
(2) hot-pressure oxidation, by bottom ore pulp in 220 DEG C of temperature, partial pressure of oxygen 0.8MPa, oxygen gas tube is extended under agitating paddle
Side's multiple spot annular in shape adds, and stirs linear velocity 4.5m/s, controls residence time 1h；
(3) solid-liquor separation, oxidizing slag 6 and oxidation solution 7 are obtained；
(4) CIL carries gold, adds lime regulation pH9.5-10 to oxidizing slag 6, progress carbon-impregnated is cyanidation gold-extracted, activated carbon control
40g/L, time 23h, obtains gold loaded carbon.
The embodiment can still obtain gold leaching rate 93% when Gold Concentrate under Normal Pressure contains organic carbon 5.6%.
As described above, the present invention can be better realized.Above-described embodiment is only the optimal embodiment of the present invention, but this
The embodiment of invention is simultaneously not restricted to the described embodiments, and other are done under Spirit Essence and principle without departing from the present invention
Change, modify, replace, combine, simplify, should be equivalent substitute mode, be included in protection scope of the present invention.
Claims (2)
1. a kind of handling process of high-carbon difficult-treating gold mine, carried out as follows with condition successively：
A. pre-acidified, Gold Concentrate under Normal Pressure (1) is sized mixing to pulp density 15-20%, adds sulfuric acid (5) and carry out pre-acidified, pre-acidified groove
Connected for three grooves, connect installation foam isolating device on the chute between each groove, air (4) inflation is passed through in No. 1 groove acidization
Measure 6-8Nm3/ (㎡ h), addition kerosene (2) 5~15g/t of dosage, 2, No. 3 grooves add 2# oil (3) 10~20g/t of dosage, are passed through sky
Gas (4) aeration quantity 4-6Nm3/ (㎡ h), acidifying endpoint pH is controlled to 1~2, per groove acidificatoin time 0.5-1h, is stirred in groove
Linear velocity 4-5m/s；Dividing plate separation isolates portion's foam and collected to storage tank press filtration-pack at chute, obtain high-carbon gold mine (8) and
Bottom ore pulp；
B. hot-pressure oxidation, bottom ore pulp enter autoclave carry out hot-pressure oxidation, control 180~240 DEG C of temperature, partial pressure of oxygen 0.3~
1.0MPa, liquid-solid ratio 3~8,1~4h of reaction time；
C. solid-liquor separation, hot-pressure oxidation bottom ore pulp is subjected to solid-liquor separation, obtains oxidizing slag (6) and oxidation solution (7)；
D. carbon-impregnated cyaniding, lime is added to oxidizing slag (6), regulation pH value to 9.5-10, activated carbon content 20-40g/L is added, enters
Row carbon-impregnated is cyanidation gold-extracted, obtains gold loaded carbon.
2. technique according to claim 1, it is characterized in that oxidation solution (7) return to step A of the step C is used, it can give up
Thing utilizes and reduced the dosage of sulfuric acid (5).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796239A (en) * | 2018-05-28 | 2018-11-13 | 烟台市金奥环保科技有限公司 | A method of gold and silver in recycling high-carbon Gold Concentrate under Normal Pressure |
| CN110331287A (en) * | 2019-08-12 | 2019-10-15 | 贵州紫金矿业股份有限公司 | A kind of Carlin-type gold ore pressure pre-oxidation soda boiling extraction of gold process |
| CN110904335A (en) * | 2019-11-22 | 2020-03-24 | 厦门紫金矿冶技术有限公司 | Method for improving silver leaching rate of pressure oxidation slag of silver-containing gold concentrate difficult to treat |
| CN112662886A (en) * | 2020-12-17 | 2021-04-16 | 紫金矿业集团股份有限公司 | Method for improving gold cyaniding leaching rate of double refractory gold ores |
| CN113106246A (en) * | 2021-04-09 | 2021-07-13 | 东北大学 | Organic carbon modification method for carbon-containing refractory gold ore and characterization method thereof |
| CN113122730A (en) * | 2021-04-12 | 2021-07-16 | 东北大学 | Palmaria type gold ore double-roller crushing-bacterial pool leaching oxidation gold extraction method |
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| CN102876884A (en) * | 2012-09-10 | 2013-01-16 | 山阳秦金矿业有限公司 | Beneficiation method for high-carbon fine particle embedded gold ore |
| CN106086455A (en) * | 2016-08-18 | 2016-11-09 | 紫金矿业集团股份有限公司 | A kind of Quick Oxidation method of carbonaceous Very Small Au-ore |
| CN106498177A (en) * | 2016-09-23 | 2017-03-15 | 北京科技大学 | In a kind of baking cyaniding tailings, gold and silver iron is reclaimed and synchronous innoxious method |
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| CN102876884A (en) * | 2012-09-10 | 2013-01-16 | 山阳秦金矿业有限公司 | Beneficiation method for high-carbon fine particle embedded gold ore |
| CN106086455A (en) * | 2016-08-18 | 2016-11-09 | 紫金矿业集团股份有限公司 | A kind of Quick Oxidation method of carbonaceous Very Small Au-ore |
| CN106498177A (en) * | 2016-09-23 | 2017-03-15 | 北京科技大学 | In a kind of baking cyaniding tailings, gold and silver iron is reclaimed and synchronous innoxious method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796239A (en) * | 2018-05-28 | 2018-11-13 | 烟台市金奥环保科技有限公司 | A method of gold and silver in recycling high-carbon Gold Concentrate under Normal Pressure |
| CN108796239B (en) * | 2018-05-28 | 2020-08-18 | 烟台市金奥环保科技有限公司 | Method for recovering gold and silver from high-carbon gold concentrate |
| CN110331287A (en) * | 2019-08-12 | 2019-10-15 | 贵州紫金矿业股份有限公司 | A kind of Carlin-type gold ore pressure pre-oxidation soda boiling extraction of gold process |
| CN110904335A (en) * | 2019-11-22 | 2020-03-24 | 厦门紫金矿冶技术有限公司 | Method for improving silver leaching rate of pressure oxidation slag of silver-containing gold concentrate difficult to treat |
| CN112662886A (en) * | 2020-12-17 | 2021-04-16 | 紫金矿业集团股份有限公司 | Method for improving gold cyaniding leaching rate of double refractory gold ores |
| CN113106246A (en) * | 2021-04-09 | 2021-07-13 | 东北大学 | Organic carbon modification method for carbon-containing refractory gold ore and characterization method thereof |
| CN113122730A (en) * | 2021-04-12 | 2021-07-16 | 东北大学 | Palmaria type gold ore double-roller crushing-bacterial pool leaching oxidation gold extraction method |
| CN113122730B (en) * | 2021-04-12 | 2022-05-24 | 东北大学 | Palmaria type gold ore double-roller crushing-bacterial pool leaching oxidation gold extraction method |
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