CN110013918A - Method for improving gold recovery rate of semi-primary semi-oxidized gold ore by full flotation process - Google Patents
Method for improving gold recovery rate of semi-primary semi-oxidized gold ore by full flotation process Download PDFInfo
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- CN110013918A CN110013918A CN201910035892.1A CN201910035892A CN110013918A CN 110013918 A CN110013918 A CN 110013918A CN 201910035892 A CN201910035892 A CN 201910035892A CN 110013918 A CN110013918 A CN 110013918A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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Abstract
The invention provides a method for improving the gold recovery rate of semi-primary semi-oxidized gold ores by a full flotation process, which comprises the following steps: (1) after grinding raw ores, performing rough concentration through a first-stage flotation column to obtain primary concentrate and primary tailings, and performing fine concentration on the primary concentrate through a first-stage flotation column to obtain fine concentration tailings and final gold concentrate; (2) scavenging the primary tailings by a primary flotation machine to obtain scavenging first concentrate and scavenging first tailings, scavenging the scavenging first tailings by a secondary flotation machine to obtain scavenging second concentrate and final tailings, and returning the scavenging second concentrate to the primary scavenging; (3) and combining the selected tailings and the scavenging-concentrate concentrated by the gold-carrying lean intergrowth for cyclone classification operation to obtain a sand setting product and an overflow product, regrinding the sand setting product, combining the sand setting product and the overflow product, and returning to the first-stage roughing. The method effectively solves the problem of low recovery rate of the flotation gold caused by the fact that the poor intergrowth enters the tailings in the production process, and simultaneously eliminates cyaniding leaching operation in the prior art and eliminates the harm of cyanide to the environment from the source.
Description
Technical field
The present invention relates to gold mine gold recovery technology fields, particularly relate to a kind of half primary gold semi-oxidized of bulk flotation technique raising
The method of mine gold recovery, alternative existing flotation+cyanidation technology eliminate harm of the cyanide to environment.
Background technique
China's gold mineral product is resourceful, but with the continuous consumption of golden resource, currently possesses golden resource reserve situation simultaneously
Pessimistic, downward trend year by year is presented in gold mine average grade.Due to consuming excessively to superficial part resource in the past, gold mine prospecting is opened
Hair gradually turns to deep, and gold ore resource increasingly shows the features such as distribution dissipates, selects smelting and recycling difficult, low-grade difficult mineral products
Resource accounting is gradually increased.
This kind of ore is difficult to reach and effectively extracts gold during development and utilization using conventional or single flotation and metallurgy method
Purpose.For rock gold mine and associated gold ore, since mineral and gangue fine-grained disseminated grain, symbiosis are complicated, conventional is single
Treatment process (gravity treatment, flotation, Cyanide Leaching) technique can not effectively recycle gold therein, it is therefore desirable to use joint work to gold mine
Skill extracts gold, and main process integration has the techniques such as gravity treatment-flotation, gravity treatment-leaching and flotation-leaching.
Oxide ore, primary ore and composite ore can be divided into according to gold leaching rate, corresponding existing to select gold process be complete
Mud cyaniding, flotation and flotation+cyanidation technology.As oxide ore is gradually deeply exploited, ore properties evolve as half primary half
Thus the mixed ore of oxidation causes the change of golden dressing and smelting process due to the variation of geologically gold occurrence state, general to use
Flotation+cyanidation technology is recycled, and for the gold in the embedding sulfide being distributed in, is suitable for being recycled using floatation process, is obtained aurin
Mine.And preservation is in gangue crack or the gold wrapped up, is recycled using all sliming cyanidation technique more effective, allows for so such mixed
The more complete recycling of gold in mould assembly ore, Specific Principles technique are as shown in Figure 1.
It is general to use according to the mineralogy features of its gold for the hybrid metal ore of semi-oxidized half primary type
Flotation+flotation tailing cyanidation technology recycling, but the technique inevitably has the following problems: 1, flotation gold recovery compared with
Low, usually 50%-60%, gold grade is higher in tailing, reaches 0.5 g ton or so；2, gold uses full mud in flotation tailing
Cyanidation technology recycling, thus brings problem of environmental pollution can not be ignored.
Summary of the invention
The present invention is directed to half primary mixed type Features of The Gold Resources semi-oxidized, provides a kind of poor adhesion mineral selectivity of load gold
Ore grinding-particulate gold-carrying minerals flotation recovery method, substitutes existing flotation+cyaniding and leaching process, solves in floatation process
Lean intergrowth enters tailing, the problem for causing flotation gold recovery low, achievees the purpose that bulk flotation technique recycles the eka-gold resource,
Cyanide environmental pollution is eliminated from source simultaneously.
The technical scheme of the present invention is realized as follows: a kind of bulk flotation technique improves half primary gold mine gold recycling semi-oxidized
The method of rate, comprising the following steps:
(1) raw ore obtains primary concentrate and primary tailing by one section of roughing, passes through in one section of roughing efficient after ore grinding
Collecting agent promotes its floating of lean intergrowth, and primary concentrate is through one section of selected acquisition cleaner tailings and final Gold Concentrate under Normal Pressure；
(2) primary tailing scans acquisition through one section and scans a concentrate and scan a tailing, scans a tailing and scans through two sections
Two concentrate and true tailings are scanned in acquisition, are scanned two concentrate and are back to one section and scan；
(3) cyclone classification operation is carried out with concentrate merging is scanned for carrying the cleaner tailings that golden lean intergrowth is concentrated,
It obtains sand setting product and overflow product, sand setting product is regrinded, occur gold-carrying minerals in the form of monomer or rich intergrowth, so
Merge afterwards with overflow product and returns to one section of roughing.
Further, in step (1), raw ore is after ore grinding, and into roughing flotation column, what is be added in raw ore per ton is efficiently caught
Receipts agent is MA collecting agent 90g/t and P-1 collecting agent 30g/t, in addition, No. 2 oil 9g/t of foaming agent are added, is obtained mainly by monomer solution
The primary concentrate of the gold bearing sulfide composition different from adhesion degree.
Further, one section of roughing and one section of selected use cyclone-static flotation column or jet flotation machine in step (1).
Further, primary concentrate is selected into selected flotation column blank in step (1) in step (1), obtains final gold
Concentrate and cleaner tailings, based on gold bearing sulfide lean intergrowth, blank is selected to be referred to not adding valuable mineral in cleaner tailings
Add collecting agent and foaming agent etc..
Further, in step (2), primary tailing per ton adds No. 2 oil 9g/t of MA collecting agent 30g/t and foaming agent, into
Enter one section of scavenging flotation machine, obtain the golden lean intergrowth composition of load that valuable mineral is mainly coarse grain scans a concentrate.
Further, in step (2), MA collecting agent 30g/t is added in a tailing per ton of scanning, and scans flotation into two sections
Machine obtains what valuable mineral was referred to by poorer two concentrate of scanning for carrying golden intergrowth or wrapping up mineral composition, the poorer golden intergrowth of load
It is that can float the golden lean intergrowth of the lower load of mineral content relative to scanning a concentrate.
Further, in step (1), raw ore passes through ball milling-graded operation, is milled to -0.074mm and accounts for 60%, into one section
Roughing, coarse grain of the partial size greater than 0.074mm, which returns, continues ball milling.
Further, in step (3), cyclone classification operation, obtaining fineness is the sand setting production that -0.025mm accounts for 53.77%
Product and fineness -0.025mm account for 98.71% overflow product, and sand setting product is regrinded by Ball-stirring mill, be milled to fineness reach -
0.025mm accounts for 75.25%, then merges with overflow product and is back to one section of roughing.
Beneficial effects of the present invention: compared with the existing technological process of production, hydrocyclone sand Regrinding of the present invention is mentioned
The high dissociation degree for carrying golden lean intergrowth, will carry golden lean intergrowth mill and opens, make gold-carrying minerals in the form of monomer or rich intergrowth
Occur；Pre-selection graded operation ensure that the higher valuable mineral of dissociation degree is not overground；The cooperation of eddy flow-Static Flotation Column,
The particulate valuable mineral after regrinding has been recycled well.The present invention efficiently solves lean intergrowth in production procedure and enters most finality
Mine, the problem for causing flotation gold recovery low, while excessive lean intergrowth is also avoided into final Gold Concentrate under Normal Pressure, it reduces final
The gold grade of Gold Concentrate under Normal Pressure.
MA collecting agent of the present invention is modified alkyl xanthates, and P-1 collecting agent is polyamine compounds, two kinds of collecting agents
It is combined into high-efficient collecting agent, with the strong advantage of collecting ability, the floating for being conducive to the golden lean intergrowth of coarse grain load enters primary essence
Mine reduces the grade of flotation tailing, provides precondition for subsequent selective ore grinding, thereby reduces the product of true tailings
Position.
The present invention uses selective regrinding, is distributed more intermediate products for carrying after golden lean intergrowth mineral float, such as
Cleaner tailings scans a concentrate etc., and using Ball-stirring mill to regrind is made to carry golden lean intergrowth dissociation or gone out in the form of opposite rich intergrowth
It is existing, the progress roughing of roughing flotation column is back to for subsequent particulate, and advantage is provided.
Column machine of the present invention is reelected, and is combined by flotation column-flotation device, and flotation device recycles coarse grain lean intergrowth, static state rotation
The particulate gold-carrying minerals after fine grinding are recycled in stream flotation, the common recycling for reinforcing valuable element.
The present invention is suitable with existing flotation+cyanidation technology for the semi-oxidized half primary golden total recovery of mixed type gold mine acquisition,
Since its processing cost of cyanidation technology link abandoned is 100 yuan/ton, which accounts for the 50% of prior art production cost, therefore
Present invention process can reduce existing processing cost 50%.It can be eliminated from source in the implementation of environment, secure context, present invention process
Cyanidation tailings environmental pollution, and save cyanide residue blowdown expenses；Flotation tailing has the condition of underground filling, row simultaneously
In addition to Tailings Dam is to the potential security risk of Lower Reaches, the mining rate of extraction is improved, there is certain economy, environmental protection and safety effect
Benefit.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the production technological process for extracting gold existing to mixed type gold mine；
Fig. 2 is the production technological process that gold is extracted to the mixed type gold mine present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
Songxian County Taurus Co., Ltd, Billion Group Dong Wan selects factory's half primary gold ore stone semi-oxidized in raw ore use, as shown in Fig. 2,
A kind of method that bulk flotation technique improves half primary gold mine gold recovery semi-oxidized, comprising the following steps:
(1) raw ore obtains primary concentrate and primary tailing by one section of roughing, primary concentrate is through a Duan Jingxuan after ore grinding
Obtain cleaner tailings and final Gold Concentrate under Normal Pressure；
The raw ore that gold grade is 1.6g/t is passed through into ball milling-graded operation, -0.074mm is milled to and accounts for 60%, carry out one section
Roughing, coarse grain of the partial size greater than 0.074mm, which returns, continues ball milling.After ore pulp enters roughing flotation column, in terms of raw ore per ton, it is added
No. 2 oil 9g/t of MA collecting agent 90g/t, P-1 collecting agent 30g/t and foaming agent, the mine liquid concentration into roughing flotation column are 33%,
One section of roughing carries out under the conditions of in ± 0.5 natural pH=7, obtains primary concentrate and primary tailing, primary concentrate is mainly by list
Body dissociates the gold bearing sulfide composition different with adhesion degree, gold grade 5-10g/t, primary tailing gold grade 0.6g/t；It is primary
Concentrate is selected into selected flotation column blank, and the selected pulp density of primary concentrate is 10%, and one section selected in natural pH=7
It is carried out under the conditions of ± 0.5, obtains final Gold Concentrate under Normal Pressure and cleaner tailings, the gold grade of final Gold Concentrate under Normal Pressure is greater than 30g/t, cleaner tailings
The predominantly different gold bearing sulfide of adhesion degree, gold grade 2-3g/t.
Roughing flotation column and selected flotation column are cyclone-static flotation column, are also changed to jet flotation machine.
(2) primary tailing scans acquisition through one section and scans a concentrate and scan a tailing, scans a tailing and scans through two sections
Two concentrate and true tailings are scanned in acquisition, are scanned two concentrate and are back to one section and scan；
In terms of mine per ton, primary tailing adds No. 2 oil 9g/t of MA collecting agent 30g/t and foaming agent, scans into one section floating
Machine is selected, the mine liquid concentration that primary tailing enters one section of scavenging flotation machine is 28%, and one section is scanned in natural pH=7 ± 0.5
It is carried out under part, acquisition scans a concentrate and scans a tailing, scans a concentrate gold grade 1-2g/t, valuable mineral is mainly coarse grain
Load gold lean intergrowth, scan a tailing gold grade 0.4g/t；In terms of mine per ton, scans a tailing and MA collecting agent 30g/t is added,
Into two sections of scavenging flotation machines, the concentration for scanning a tailing into two sections of scavenging flotation machines is 25%, and two sections are scanned in nature
It being carried out under the conditions of pH=7 ± 0.5, two concentrate and true tailings are scanned in acquisition, the gold grade 1.1-1.5g/t of two concentrate is scanned,
Valuable mineral is the golden intergrowth of poorer loads or wraps up mineral, scans two concentrate and is back to one section of scavenging flotation machine and is sorted.
(3) cyclone classification operation is carried out with concentrate merging is scanned for carrying the cleaner tailings that golden lean intergrowth is concentrated,
It obtains sand setting product and overflow product, sand setting product is regrinded, then merge with overflow product and return to one section of roughing；
Merge progress cyclone classification operation with a concentrate is scanned for the cleaner tailings that gold-carrying minerals lean intergrowth is concentrated,
Graded operation sand setting product fineness is that -0.025mm accounts for 53.77%, and sand setting product is milled to fineness by stirring and reaches -0.025mm
75.25% is accounted for, merges with -0.025mm overflow the product for accounting for 98.71% and is back to the progress roughing of roughing flotation column.
Raw ore multielement analysis the results are shown in Table 1.
The multinomial analysis result of table 1 raw ore chemistry
| Ingredient | Au* | Ag* | Pb | Zn | Cu | S | As | TFe |
| Content (%) | 1.62 | 15.63 | 0.064 | 0.071 | 0.0023 | 1.25 | 0.0065 | 3.80 |
| Ingredient | SiO2 | Al2O3 | K2O | CaO | MgO | Na2O | WO3 | |
| Content (%) | 68.71 | 10.02 | 5.48 | 1.81 | 1.37 | 0.14 | 0.036 |
The method for improving half primary gold mine gold recovery semi-oxidized using the bulk flotation technique of the present embodiment carries out half industry
The average index that gained mineral products are reelected in test for 72 hours is shown in Table 2, and corresponding same period scene is produced using prior art shown in FIG. 1
The index of gained mineral products is shown in Table 3.
Table 2 present invention process pilot-plant test, 72 hours index averages
| Name of product | Yield (%) | Gold grade (g/t) | Gold recovery (%) |
| Final Gold Concentrate under Normal Pressure | 4.06 | 34.50 | 85.87 |
| True tailings | 95.94 | 0.24 | 14.13 |
| Raw ore | 100.00 | 1.63 | 100.00 |
The corresponding small hourly value of pilot-plant test production target 72 in 3 scene of table
As known from Table 3, flotation tailing gold grade is 0.48g/t, and tailings, tailings gold product are obtained after cyanidation technology gold operation
Position is reduced to 0.24g/t, and gold recovery is 50% in flotation tailing, to raw ore gold recovery 14.39%, flotation+cyanidation technology
Golden total recovery 85.62%.
Contrast table 2 and table 3, invention for semi-oxidized half primary mixed type gold mine obtain golden total recovery with it is existing
Flotation+cyanidation technology is suitable, but this invention simplifies process flows, eliminate cyanidation technology, reduces production cost, and
Cyanidation tailings environmental pollution is eliminated from source, and saves cyanide residue blowdown expenses.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of method that bulk flotation technique improves half primary gold mine gold recovery semi-oxidized, which is characterized in that including following step
It is rapid:
(1) raw ore obtains primary concentrate and primary tailing by one section of roughing, passes through efficient collecting in one section of roughing after ore grinding
Agent promotes to carry golden lean intergrowth floating, and primary concentrate is through one section of selected acquisition cleaner tailings and final Gold Concentrate under Normal Pressure；
(2) primary tailing scans acquisition through one section and scans a concentrate and scan a tailing, scans a tailing through two sections and scans acquisition
Two concentrate and true tailings are scanned, two concentrate is scanned and is back to one section and scan；
(3) cyclone classification operation is carried out with concentrate merging is scanned for carrying the cleaner tailings that golden lean intergrowth is concentrated, obtained
Sand setting product and overflow product, sand setting product are regrinded, and occur gold-carrying minerals in the form of monomer or rich intergrowth, then with
Overflow product, which merges, returns to one section of roughing.
2. the method that a kind of bulk flotation technique according to claim 1 improves half primary gold mine gold recovery semi-oxidized,
It is characterized in that, in step (1), raw ore is after ore grinding, and into roughing flotation column, the high-efficient collecting agent being added in raw ore per ton is MA
Collecting agent 90g/t and P-1 collecting agent 30g/t is obtained in addition, No. 2 oil 9g/t of foaming agent are added mainly by monomer dissociation and adhesion
The primary concentrate of the different gold bearing sulfide composition of degree.
3. the method that a kind of bulk flotation technique according to claim 1 improves half primary gold mine gold recovery semi-oxidized,
It is characterized in that, one section of roughing and one section of selected use cyclone-static flotation column or jet flotation machine in step (1).
4. the method that a kind of bulk flotation technique according to claim 1 improves half primary gold mine gold recovery semi-oxidized,
It is characterized in that, primary concentrate is selected into selected flotation column blank in step (1), obtains final Gold Concentrate under Normal Pressure and cleaner tailings, essence
Select in tailing valuable mineral based on gold bearing sulfide lean intergrowth.
5. the method that a kind of bulk flotation technique according to claim 1 improves half primary gold mine gold recovery semi-oxidized,
It is characterized in that, in step (2), No. 2 oil 9g/t of MA collecting agent 30g/t and foaming agent is added in primary tailing per ton, into one section
Scavenging flotation machine, obtain the golden lean intergrowth composition of load that valuable mineral is mainly coarse grain scans a concentrate.
6. the method that a kind of bulk flotation technique according to claim 1 improves half primary gold mine gold recovery semi-oxidized,
It is characterized in that, it is per ton to scan addition MA collecting agent 30g/t in a tailing in step (2), into two sections of scavenging flotation machines, obtain
Valuable mineral be it is poorer carry golden intergrowth or package mineral composition scan two concentrate.
7. the method that a kind of bulk flotation technique according to claim 1 improves half primary gold mine gold recovery semi-oxidized,
It is characterized in that, in step (1), raw ore passes through ball milling-graded operation, is milled to -0.074mm and accounts for 60%, into one section of roughing, grain
Coarse grain of the diameter greater than 0.074mm, which returns, continues ball milling.
8. the method that a kind of bulk flotation technique according to claim 1 improves half primary gold mine gold recovery semi-oxidized,
It is characterized in that, in step (3), cyclone classification operation, obtaining fineness is that -0.025mm accounts for 53.77% sand setting product and thin
Degree -0.025mm accounts for 98.71% overflow product, and sand setting product is regrinded by Ball-stirring mill, is milled to fineness and reaches -0.025mm and accounts for
75.25%, then merge with overflow product and is back to one section of roughing.
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| CN114029157A (en) * | 2021-11-10 | 2022-02-11 | 长春黄金研究院有限公司 | Optimization method of flotation process |
| CN114029157B (en) * | 2021-11-10 | 2024-03-15 | 长春黄金研究院有限公司 | Optimization method of flotation process |
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| CN110013918B (en) | 2021-05-14 |
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