CN104722408B - Method for recycling gold in cyanided tailings in ramified and series flotation mode - Google Patents
Method for recycling gold in cyanided tailings in ramified and series flotation mode Download PDFInfo
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- CN104722408B CN104722408B CN201410678782.4A CN201410678782A CN104722408B CN 104722408 B CN104722408 B CN 104722408B CN 201410678782 A CN201410678782 A CN 201410678782A CN 104722408 B CN104722408 B CN 104722408B
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Abstract
The invention discloses a method for recycling gold in cyanided tailings in a ramified and series flotation mode. The method includes the following steps that ore pulp pretreatment is conducted, and sodium carbonate and ferrous sulfate are used as ore pulp regulators; coal oil flotation decarbonizing is carried out; ramified pulp mixing is conducted, the decarbonized ore pulp automatically flows to a stirring and distributing groove, and the ore pulp is evenly distributed to two pulp mixing barrels for mixing pulp through the stirring and distributing groove; ramified and series flotation is performed, foam products in first rougher flotation fully enter in second rougher flotation to be subjected to flotation together with the decarbonized ore pulp, foam products in second rougher flotation undergo closed circuit concentration operation of first concentration and second concentration to obtain gold concentrate, and no drug is added in the concentration stage; products in the groove of first rougher flotation are subjected to closed circuit scavenging of first scavenging and second scavenging to obtain tailings. By the adoption of the method, the recovery rate of the gold can be improved obviously, meanwhile, drug consumption is lowered, and the cost is saved.
Description
Technical field
The present invention relates to technical field of mineral processing, specifically to relate to one kind and to reclaim cyaniding tail using branch's crossfire flotation
The method of gold in slag.
Background technology
Cyanidation tailings are the waste residues being proposed generation during gold by gold mine cyaniding, and the still gold containing recoverable, containing gold
Amount, typically in more than 1g/t, is a kind of secondary resource.Contain some heavy metal ion and cyanide in cyanidation tailings, its length simultaneously
Phase stores up in a large number can be to environment.In recent years, many researcheres are to carrying out proposing gold research from cyanidation tailings, but due to
Cyanide residue with the addition of the medicaments such as Cyanogran., Calx, bleaching powder in process of production, and processing through long-time cyaniding makes mineral surfaces
Property there occurs that obvious change, particularly auriferous pyrite and other sulfide containing gold are easily oxidized makes its floatability decline,
Along with cyanide acts on to the strong inhibition of sulfide mineral, the microfine cyaniding slag flotation being difficult to ore dressing in itself is made to propose gold change
Must be more difficult to.It can be seen that research cyanide residue extraction of gold process efficient and with low cost and medicament, comprehensive for solution environmental pollution and resource
Close using having important reality and far-reaching significance.
Content of the invention
It is an object of the invention to a kind of response rate significantly improving gold overcoming disadvantages mentioned above and providing, reduce medicine simultaneously
The method that gold in cyanidation tailings is reclaimed in consumption, the crossfire flotation of cost-effective utilization branch.
The method that gold in cyanidation tailings is reclaimed in a kind of utilization branch crossfire flotation of the present invention, comprises the following steps：
（1）Ore pulp pretreatment：Tailings after all sliming cyanidation is processed adds surge tank, and the adjustment pulp density 20 of adding water～
40%, normal temperature and pressure continuous stirring 5～7 minutes, the Na uniformly adding 1000～1500g/t afterwards to be mixed2CO3With 500～
The Fe of 1200g/t2SO4, adjust pH values of pulp=7～8, then pump is to flotation stage；
（2）Flotation removes carbon：The good ore pulp of pretreatment is pumped into stirring dashpot, continues stirring 15～20 minutes, from inflow
Surge tank, adds the kerosene of 50～80g/t and the terpenic oil of 20～30g/t, and after being sufficiently stirred for 3～5 minutes, ore pulp enters flotation
Machine carries out flotation and removes carbon, and froth pulp obtains carbon containing Gold Concentrate under Normal Pressure after filter pressing；
（3）Shunting is sized mixing：Except the pulp gravity flow after carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to
Two mixing cirterns are sized mixing, add in roughly selecting a mixing cirtern sodium hexameta phosphate 600～1000g/t, waterglass 900～
1500g/t, plumbi nitrass 400～600g/t, copper sulfate 500～1000g/t, butylamine black powder 50～80g/t and benzyl hydroximic acid are used
Amount 8～15g/t, roughly selects and adds sodium hexameta phosphate 300～400g/t, waterglass 400～800g/t, plumbi nitrass in two mixing cirterns
200～250g/t, copper sulfate 150～500g/t, butylamine black powder 10～50g/t and benzyl hydroximic acid consumption 3～6g/t, and continuously
Stir, then pump enters branch's crossfire flotation to two initial separatory cells；
（4）Branch's crossfire flotation：Roughly select one froth pulp to fully enter and roughly select two with ore pulp flotation together after carbon, slightly
The froth pulp selecting two obtains Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, and this selected stage is without any medicine
Agent；Roughly select in one groove product through scanning one, to scan two closed circuit scan after mine tailing.Scanning stage process condition is：
Scan one：Copper sulfate 150～400g/t, isoamyl xanthate 10～50g/t, terpenic oil 5～25g/t；
Scan two：Isoamyl xanthate 5～30g/t, terpenic oil 2～15g/t.
The method that gold in cyanidation tailings is reclaimed in a kind of above-mentioned utilization branch crossfire flotation, wherein：Cyanidation tailings contain
Au1.42～2.82g/t, carbon containing 0.92～1.32%, sulfur-bearing 0.22～0.92%.
The method that gold in cyanidation tailings is reclaimed in a kind of above-mentioned utilization branch crossfire flotation, wherein：The foam scanning two returns
Flyback selects one, and the foam return scanning roughly selects one.
The method that gold in cyanidation tailings is reclaimed in a kind of above-mentioned utilization branch crossfire flotation, wherein：Selected two ore pulp returns
Return selected one, selected one ore pulp returns roughly selects two.
The present invention compared with prior art, has obvious beneficial effect, as can be known from the above technical solutions：Using sodium carbonate
It is ore pulp regulator with ferrous sulfate, dispersion ore pulp can be played and adjustment ore pulp alkalescence precipitates the fine- disseminated ore in ore pulp simultaneously
The effect of mud, so that the floatability of target minreal is recovered and is improved；Carbon is removed using kerosene flotation, flow process can be substantially reduced
In carbon content, reduce the adsorption to floating agent for the carbon, provide good environment for branch's crossfire flotation below, reduce
Reagent cost.Using the gold in branch's crossfire flotation for recovery of fine cyanidation tailings, can make full use of roughly select a froth pulp and
Residual pharmacy in ore pulp, thus reduce the additive amount of medicament roughly selecting two so as to total dosing is only conventional flotation dosage
60～90%, simultaneously the mineral particle through pharmacy effect hydrophobization played " load " effect of its floc sedimentation again, reach and " carry
The effect of flotation body ", substantially increases the response rate of gold, is allowed to reach more than 90%.Present invention process is simple, economic and practical, medicine
Agent consumption is few, small investment, instant effect, has significant technology and economic effect for the gold utensil recycling in microfine cyanidation tailings
Benefit, has wide popularizing application prospect.
Brief description
Fig. 1 is the process chart of the present invention.
Specific embodiment
Embodiment 1
The method that gold in cyanidation tailings is reclaimed in a kind of crossfire flotation of utilization branch, comprises the following steps：
All sliming cyanidation tailings contains Au2.82g/t, carbon containing 1.32%, sulfur-bearing 0.92%, and add water adjustment pulp density 20～40%,
Normal temperature and pressure continuous stirring 5～7 minutes, according to reagent combination listed by table 1, to be mixed uniformly afterwards add Na2CO3, FeSO4 sizes mixing
PH=7～8, the good ore pulp of pretreatment is pumped into stirring dashpot, continues stirring 15～20 minutes, from flowing into surge tank, adds coal
Oil and terpenic oil, are sufficiently stirred for 3 minutes, and ore pulp enters flotation device and carries out flotation except carbon, and froth pulp is contained after filter pressing
Carbon Gold Concentrate under Normal Pressure；Except the pulp gravity flow after carbon is to stirring distributing trough, ore pulp is averagely allocated to by two mixing cirterns by stirring distributing trough,
Roughly selecting one, roughly select and in two mixing cirterns, be separately added into the different beneficiation reagent of ratio, and continuous stirring is uniformly, then pump is to two
Initial separatory cell enters branch crossfire flotation stage, roughly selects one froth pulp and fully enters and roughly select two with ore pulp one floating after carbon
Choosing, the froth pulp roughly selecting two obtains final Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, the selected stage without
Any medicament；Roughly select in a groove product through through scanning one, to scan two closed circuit scan after mine tailing.The foam return scanning two is scanned
One, the foam return scanning roughly selects one.Selected two ore pulp returns selected one, and selected one ore pulp returns roughly selects two.Entirely
Branch's crossfire floatation process is carried out in row's flotation device, output concentrate and tailings.
Obtain the listed carbon containing Gold Concentrate under Normal Pressure containing Au18.33g/t, the response rate 9.88% of table 2 through analysis, containing Au39.11g/t, return
The Gold Concentrate under Normal Pressure of yield 80.44%.Bulk concentrate Au34.80g/t, the overall recovery 90.32% of gold.
Embodiment 2
The method that gold in cyanidation tailings is reclaimed in a kind of crossfire flotation of utilization branch, comprises the following steps：
Certain all sliming cyanidation mine tailing contains Au1.91g/t, carbon containing 1.15%, sulfur-bearing 0.52%, and add water adjustment pulp density 20～40%
, normal temperature and pressure continuous stirring 5～7 minutes, according to reagent combination listed by table 1, formula, to be mixed uniformly add Na afterwards2CO3、
FeSO4 sizes mixing pH=7～8, and the good ore pulp of pretreatment is pumped into stirring dashpot, continues stirring 15～20 minutes, sizes mixing from flowing into
Groove, adds kerosene and terpenic oil, is sufficiently stirred for 4 minutes, and ore pulp enters flotation device and carries out flotation except carbon, and froth pulp is through filter pressing
After obtain carbon containing Gold Concentrate under Normal Pressure；Except the pulp gravity flow after carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two
Individual mixing cirtern, roughly selecting one, roughly selects and is separately added into the different beneficiation reagent of ratio in two mixing cirterns, and continuous stirring is uniformly, so
Pump enters branch's crossfire flotation stage to two initial separatory cells afterwards, roughly selects one froth pulp and fully enters and roughly select two with ore deposit after carbon
Slurry flotation together, the froth pulp roughly selecting two obtains final Gold Concentrate under Normal Pressure, selected rank through selected one, selected two closed circuit selected operations
Section is without any medicament；Roughly select in a groove product through through scanning one, to scan two closed circuit scan after mine tailing.Scan two foam
Return scans one, and the foam return scanning roughly selects one.Selected two ore pulp returns selected one, and selected one ore pulp returns to be roughly selected
Two.Whole branch crossfire floatation process is carried out in row's flotation device, output concentrate and tailings.
Obtain the listed carbon containing Gold Concentrate under Normal Pressure containing Au15.56g/t, the response rate 10.08% of table 2 through analyzing, g/t containing Au38.28,
The Gold Concentrate under Normal Pressure of the response rate 80.22%.Bulk concentrate Au 32.92g/t, the overall recovery 90.30% of gold.
Embodiment 3
The method that gold in cyanidation tailings is reclaimed in a kind of crossfire flotation of utilization branch, comprises the following steps：
Certain all sliming cyanidation mine tailing contains Au1.42g/t, carbon containing 0.92%, sulfur-bearing 0.22%, and add water adjustment pulp density 20～40%
, normal temperature and pressure continuous stirring 5～7 minutes, according to reagent combination listed by table 1, formula, to be mixed uniformly add Na afterwards2CO3、
FeSO4 sizes mixing pH=7～8, and the good ore pulp of pretreatment is pumped into stirring dashpot, continues stirring 15～20 minutes, sizes mixing from flowing into
Groove, adds kerosene and terpenic oil, is sufficiently stirred for 5 minutes, and ore pulp enters flotation device and carries out flotation except carbon, and froth pulp is through filter pressing
After obtain carbon containing Gold Concentrate under Normal Pressure；Except the pulp gravity flow after carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two
Individual mixing cirtern, roughly selecting one, roughly selects and is separately added into the different beneficiation reagent of ratio in two mixing cirterns, and continuous stirring is uniformly, so
Pump enters branch's crossfire flotation stage to two initial separatory cells afterwards, roughly selects one froth pulp and fully enters and roughly select two with ore deposit after carbon
Slurry flotation together, the froth pulp roughly selecting two obtains final Gold Concentrate under Normal Pressure, selected rank through selected one, selected two closed circuit selected operations
Section is without any medicament；Roughly select in a groove product through through scanning one, to scan two closed circuit scan after mine tailing.Whole branch crossfire
Floatation process is carried out in row's flotation device, output concentrate and tailings.
Obtain the listed carbon containing Gold Concentrate under Normal Pressure containing Au16.82g/t, the response rate 9.83% of table 2 through analyzing, g/t containing Au36.11,
The Gold Concentrate under Normal Pressure of the response rate 78.32%.Bulk concentrate Au 32.02g/t, the overall recovery 88.15% of gold.
Claims (4)
1. the method that gold in cyanidation tailings is reclaimed in a kind of crossfire flotation of utilization branch, comprises the following steps：
（1）Ore pulp pretreatment：Tailings after all sliming cyanidation is processed adds surge tank, and add water adjustment pulp density 20～40%,
Normal temperature and pressure continuous stirring 5～7 minutes, the Na uniformly adding 1000～1500g/t afterwards to be mixed2CO3With 500～1200g/t's
FeSO4, adjust pH values of pulp=7～8, then pump is to flotation stage；
（2）Flotation removes carbon：The good ore pulp of pretreatment is pumped into stirring dashpot, continues stirring 15～20 minutes, size mixing from flowing into
Groove, adds the kerosene of 50～80g/t and the terpenic oil of 20～30g/t, and after being sufficiently stirred for 3～5 minutes, ore pulp enters flotation device and enters
Row flotation removes carbon, and froth pulp obtains carbon containing Gold Concentrate under Normal Pressure after filter pressing；
（3）Shunting is sized mixing：Except the pulp gravity flow after carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two
Mixing cirtern is sized mixing, in roughly selecting a mixing cirtern add sodium hexameta phosphate 600～1000g/t, waterglass 900～1500g/t,
Plumbi nitrass 400～600g/t, copper sulfate 500～1000g/t, butylamine black powder 50～80g/t and benzyl hydroximic acid consumption 8～15g/
T, roughly selects and adds sodium hexameta phosphate 300～400g/t, waterglass 400～800g/t, plumbi nitrass 200～250g/ in two mixing cirterns
T, copper sulfate 150～500g/t, butylamine black powder 10～50g/t and benzyl hydroximic acid consumption 3～6g/t, and continuous stirring is uniformly,
Then pump enters branch's crossfire flotation to two initial separatory cells；
（4）Branch's crossfire flotation：Roughly select one froth pulp to fully enter and roughly select two with ore pulp flotation together after carbon, roughly select two
Froth pulp obtain Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, this selected stage is without any medicament；Slightly
Select in one groove product through scanning one, to scan two closed circuit scan after mine tailing, scan stage process condition and be：
Scan one：Copper sulfate 150～400g/t, isoamyl xanthate 10～50g/t, terpenic oil 5～25g/t；
Scan two：Isoamyl xanthate 5～30g/t, terpenic oil 2～15g/t.
2. the method that gold in cyanidation tailings is reclaimed in a kind of crossfire flotation of utilization branch as claimed in claim 1, wherein：Cyaniding tail
Slag contains Au1.42～2.82g/t, carbon containing 0.92～1.32%, sulfur-bearing 0.22～0.92%.
3. the method that gold in cyanidation tailings is reclaimed in a kind of crossfire flotation of utilization branch as claimed in claim 1 or 2, wherein：Sweep
The foam return selecting two scans one, and the foam return scanning roughly selects one.
4. the method that gold in cyanidation tailings is reclaimed in a kind of crossfire flotation of utilization branch as claimed in claim 1 or 2, wherein：Essence
The ore pulp selecting two returns selected one, and selected one ore pulp returns roughly selects two.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105327783B (en) * | 2015-11-17 | 2018-02-09 | 紫金矿业集团股份有限公司 | Low-grade scheelite ramified flotation method |
| CN105381886B (en) * | 2015-12-14 | 2017-12-29 | 灵宝金源晨光有色矿冶有限公司 | It is a kind of to be used for the floating agent containing golden thiocyanation castaway slag |
| CN106799309A (en) * | 2017-01-22 | 2017-06-06 | 彝良驰宏矿业有限公司 | A kind of method for floating of high efficiency zincblende |
| CN107617507B (en) * | 2017-08-31 | 2020-04-10 | 厦门紫金矿冶技术有限公司 | Process for recovering gold and sulfur from gold concentrate biological oxidation cyanidation tailings |
| CN108262173A (en) * | 2018-01-20 | 2018-07-10 | 华北科技学院 | A kind of coal slime cooperates with floatation process |
| CN113751180A (en) * | 2021-08-20 | 2021-12-07 | 江西铜业集团有限公司 | Beneficiation method for complex embedded low-grade copper-sulfur ore |
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| US20050188791A1 (en) * | 2004-02-18 | 2005-09-01 | Seeley Larry E. | Process to recover base metals |
| CN1865461A (en) * | 2006-06-19 | 2006-11-22 | 青岛黄金铅锌开发有限公司 | Method for floatation and recovery of lead zinc mixed concentrate from gold mine cyaniding slag tails |
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