CN112474035A - Production process for obtaining sulfur concentrate from copper tailings - Google Patents
Production process for obtaining sulfur concentrate from copper tailings Download PDFInfo
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- CN112474035A CN112474035A CN202011317980.XA CN202011317980A CN112474035A CN 112474035 A CN112474035 A CN 112474035A CN 202011317980 A CN202011317980 A CN 202011317980A CN 112474035 A CN112474035 A CN 112474035A
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- dealkalization
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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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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Abstract
The invention discloses a production process for obtaining sulfur concentrate from copper tailings, which comprises the following process steps: the ore pulp after the copper tailings are thickened enters an ore drawing pool to form a thickener bottom liquid; conveying the bottom liquid of the thickener to a copper tail dealkalization slurry pump by a lining rubber pump, then conveying the bottom liquid to a copper tail dealkalization cyclone group for grading, feeding the graded settled sand into a copper tail dealkalization stirring barrel, and then feeding the settled sand into a flotation machine to start a sulfur separation process; after the settled sand enters a sulfur selecting flow, the middlings obtained by first coarse sweeping, third sweeping and first fine sweeping and second sulfur sweeping are led into a pump pool of a copper tail dealkalizing slurry pump, and then are pumped to a copper tail dealkalizing swirler by a slurry pump to carry out secondary activation and desliming; and finally, concentrating the obtained sulfur concentrate product in a concentrate concentrator. The production process for obtaining the sulfur concentrate from the copper tailings provided by the invention effectively improves the recovery rate of sulfur concentration and the taste of the sulfur concentrate by reducing the yield of overflow loss and the recovery rate of sulfur loss.
Description
Technical Field
The invention belongs to the technical field of mine sulfur separation, and particularly relates to a production process for obtaining sulfur concentrate from copper tailings.
Background
When the copper tailings are used for sulfur separation, a concentrating mill generally uses a rubber-lined pump to pump underflow of a thickener to a cyclone for classification after activating the copper tailings by using acidic water, then settled sand is selected, and overflow is returned to the thickener for reciprocating circular separation. However, with the improvement of the ball milling production efficiency in recent years, the yield of sulfur selection from copper tails is correspondingly increased, and the original cyclone can not meet the existing sulfur selection process. In order to solve the bottleneck problem of influencing production indexes, the method combines the modern sulfur separation industrial experimental research, applies the copper tail dealkalization cyclone group to optimize the classification condition, reduces the probability of influencing flotation indexes by selecting fine mud and residual medicaments, and has great significance.
The copper tail dealkalization process adopts a dehydration and dealcoholization process to pre-treat the sulfur-selecting ore pulp. The existing dealkalization process is generally provided with only one stage, namely the frequency of copper tailings entering a copper tail dealkalization cyclone is only one, so that the problems of large process overflow loss and insufficient flotation acidity exist, and the sulfur separation recovery rate and the sulfur concentrate taste are reduced.
In conclusion, how to provide a production process for obtaining sulfur concentrate from copper tailings, which can effectively improve the flotation yield, the flotation sulfur recovery rate and the sulfur concentrate grade, is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the technical problems of high overflow loss and insufficient flotation acidity in the existing sulfur separation process flow, which cause the recovery rate of sulfur separation and the reduction of the taste of sulfur concentrate, and provides a production process for obtaining sulfur concentrate from copper tailings, which solves the problems and can effectively improve the yield of sulfur separation, the recovery rate of sulfur separation and the grade of sulfur concentrate.
In order to achieve the purpose, the invention provides the following technical scheme: a production process for obtaining sulfur concentrate from copper tailings comprises the following process steps:
s1, enabling the copper tailings to enter a transmission type thickener and be extruded and thickened by a rake rack, enabling the thickened ore pulp to enter an ore drawing pool to form a thickener bottom liquid, and discharging the thickener supernatant along with an overflow port to serve as primary tailing throwing to a tailing pool;
s2, enabling the bottom liquid of the thickener to enter a rubber lining pump, conveying the bottom liquid of the thickener to a copper tail dealkalization slurry pump by the rubber lining pump, continuously pumping the slurry pump to a copper tail dealkalization cyclone group for grading, enabling the graded settled sand to enter a copper tail dealkalization stirring barrel to a sulfur separation process, and discharging dealkalization overflow substances along with an overflow port as secondary tail throwing to a tailing pond;
s3, after the settled sand enters a sulfur selecting process, sulfur sweeping a middling back to restart the sulfur selecting process through a first coarse sweeping, a third sweeping and a fine sweeping, the sulfur sweeping an overflow mineral enters a sulfur sweeping second, the middling obtained by the sulfur sweeping second is led into a pump pool of a copper tail dealkalization slurry pump, and then the middling is pumped to a copper tail dealkalization cyclone through a slurry pump to carry out secondary activation and desliming;
s4, enabling the minerals overflowing from the sulfur scavenging II to enter a sulfur scavenging III, returning the middlings obtained from the sulfur scavenging III to the upper stage to restart the sulfur scavenging II, and using the minerals overflowing from the sulfur scavenging III as sulfur tailings for underground filling;
and S5, thickening the finally obtained sulfur concentrate product in a concentrate thickener.
Further, the ore drawing pond is connected to driven type thickener bottom, the tailing storehouse is connected to driven type thickener's overflow mouth, the rubber lining pump is connected to the ore drawing pond, the rubber lining pump is connected copper tail dealkalization sediment stuff pump, copper tail dealkalization stuff pump is connected copper tail dealkalization swirler group, copper tail dealkalization agitator is connected to copper tail dealkalization swirler group's bottom, the tailing storehouse is connected to copper tail dealkalization swirler group's overflow mouth, copper tail dealkalization agitator is connected to copper tail dealkalization agitator.
Further, be equipped with the foam groove in the two flows are swept to sulphur, the foam groove is equipped with the feed inlet, defeated thick liquid pipe is connected to the feed inlet, defeated thick liquid pipe is connected with the acid water piping, the acid water piping connection goes into copper tail dealkalization sediment stuff pump pond.
Furthermore, a cylindrical deslagging screen is arranged in the pump pool of the copper-tail dealkalization slurry pump, and the sulfur-swept secondary middlings led into the pump pool are subjected to centrifugal separation of the ore pulp and impurities through the cylindrical deslagging screen.
Further, the step S3 includes that, after the second middlings of sulfur scavenging are introduced into the pump pool, acid water and clean water are added through the pump pool to mix and size-blend, and the classified settled sand enters the stirring barrel to be supplemented with the acid water to size-blend again to realize the third sulfur activation. The new process greatly improves the sulfur yield of the selected copper tail and achieves the aim of quickly activating the original sulfur in the copper tail.
Further, the pH value of the ore after the slurry mixing in the pump pool is 7.5-8, the pH value of the ore after the slurry mixing in the stirring barrel is 7.2-7.5, the stirring is kept for 1-2 hours, then the acid water is continuously used for slurry mixing to ensure that the pH value is 7-7.2, the stirring is kept for 0.5-1 hour, and the pH value is continuously adjusted to 6.5-7, and the stirring is kept for 30-45 minutes.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention forms a new process flow of industrial production of two-stage dealkalization of the thickener and the dehydration swirler through a new process of dealkalization of the copper tail, and three-stage acid water activation of the thickener and the dehydration swirler feeding and sulfur selecting stirring barrel, realizes high-efficiency dealkalization and deep classification of the copper tail, and solves the problems of large overflow loss and insufficient flotation acidity of the original process, thereby greatly increasing the selection yield, and improving the sulfur selection recovery rate and the sulfur concentrate grade;
(2) after the second sulfur swept concentrate is introduced into the pump pond, a proper amount of acid water and clear water are added into the pump pond to mix and adjust the concentration and the pH, and the classified settled sand enters the stirring barrel to be supplemented with the acid water and is subjected to size mixing again to realize the third sulfur activation, so that the new process greatly improves the sulfur yield of the selected copper tail and achieves the purpose of quickly activating the original sulfur in the copper tail;
(3) in the process, the overflow of the cyclone is directly discarded, so that the circulation amount of the alkaline overflow of the cyclone entering a thickener is reduced, and the consumption of acid water by copper tails is reduced.
Drawings
Fig. 1 is a flow chart of a production process for obtaining sulfur concentrate from copper tailings provided by the invention.
Description of reference numerals:
1. the device comprises a transmission type thickener, 2. a rubber lining pump, 3. a copper tail dealkalization slurry pump, 4. a copper tail dealkalization cyclone group and 5. a copper tail dealkalization stirring barrel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a production process for obtaining sulfur concentrate from copper tailings, comprising the following process steps:
s1, enabling the copper tailings to enter a transmission type thickener and be extruded and thickened by a rake rack, enabling the thickened ore pulp to enter an ore drawing pool to form a thickener bottom liquid, and discharging the thickener supernatant along with an overflow port to serve as primary tailing throwing to a tailing pool;
s2, enabling the bottom liquid of the thickener to enter a rubber lining pump, conveying the bottom liquid of the thickener to a copper tail dealkalization slurry pump by the rubber lining pump, continuously pumping the slurry pump to a copper tail dealkalization cyclone group for grading, enabling the graded settled sand to enter a copper tail dealkalization stirring barrel to a sulfur separation process, and discharging dealkalization overflow substances along with an overflow port as secondary tail throwing to a tailing pond;
s3, after the settled sand enters a sulfur selecting process, sulfur sweeping a middling back to restart the sulfur selecting process through a first coarse sweeping, a third sweeping and a fine sweeping, the sulfur sweeping an overflow mineral enters a sulfur sweeping second, the middling obtained by the sulfur sweeping second is led into a pump pool of a copper tail dealkalization slurry pump, and then the middling is pumped to a copper tail dealkalization cyclone through a slurry pump to carry out secondary activation and desliming;
s4, enabling the minerals overflowing from the sulfur scavenging II to enter a sulfur scavenging III, returning the middlings obtained from the sulfur scavenging III to the upper stage to restart the sulfur scavenging II, and using the minerals overflowing from the sulfur scavenging III as sulfur tailings for underground filling;
and S5, thickening the finally obtained sulfur concentrate product in a concentrate thickener.
The ore drawing pond is connected to driven type thickener bottom, the tailing storehouse is connected to driven type thickener's overflow mouth, the ore drawing pond is connected and is lined with the glue pump, line glue pump connection copper tail dealkalization sediment stuff pump, copper tail dealkalization stuff pump connection copper tail dealkalization swirler group, copper tail dealkalization agitator is connected to copper tail dealkalization swirler group's bottom, the tailing storehouse is connected to copper tail dealkalization swirler group's overflow mouth, flotation machine is connected to copper tail dealkalization agitator.
Be equipped with the foam groove in the two flows are swept to sulphur, the foam groove is equipped with the feed inlet, defeated thick liquid pipe is connected to the feed inlet, defeated thick liquid pipe is connected with the acid water piping, the acid water piping is gone into copper tail dealkalization sediment stuff pump pond.
A cylindrical deslagging screen is arranged in the pump pool of the copper tail dealkalization slurry pump, and the sulfur swept secondary middlings led into the pump pool are centrifugally separated from ore pulp and impurities through the cylindrical deslagging screen.
Example 2
The embodiment provides a production process for obtaining sulfur concentrate from copper tailings, and based on embodiment 1, the step S3 further includes, after the sulfur scavenger middlings are introduced into the pump pond, adding acid water and clear water through the pump pond to mix and size, and feeding the classified settled sand into the stirring barrel to supplement acid water to mix and size again to realize third sulfur activation. The new process greatly improves the sulfur yield of the selected copper tail and achieves the aim of quickly activating the original sulfur in the copper tail.
Example 3
This example provides a production process for obtaining sulfur concentrate from copper tailings, based on example 1, the PH of the conditioned mineral in the pump pond is 7.5, the PH of the conditioned mineral in the stirring tank is 7.2, stirring is maintained for 1-2 hours, then acid water is continuously used for conditioning the PH to 7, stirring is maintained for 0.5-1 hour, and then PH is continuously adjusted to 6.5, and stirring is maintained for 30-45 minutes.
Example 4
This example provides a production process for obtaining sulfur concentrate from copper tailings, based on example 2, the PH of the conditioned mineral in the pump pond is 8, the PH of the conditioned mineral in the stirring tank is 7.5, stirring is maintained for 1-2 hours, then acid water is continuously used for conditioning the PH to 7.2, stirring is maintained for 0.5-1 hour, and then the PH is continuously adjusted to 7, and stirring is maintained for 30-45 min.
Comparative example 1
This comparative example differs from example 1 in that step S3 is changed to: after the settled sand enters a sulfur selecting flow, middlings obtained by the first coarse sweeping, the third sweeping and the first fine sweeping, the sulfur sweeping and the second sweeping return to restart the sulfur selecting flow, and the overflowing minerals enter the sulfur sweeping second.
Comparative example 2
The difference between the comparative example and the example 3 is that the pH of the ore after the slurry mixing in the pump tank is 7.5, and the pH of the ore after the slurry mixing in the stirring barrel is 7.2 and the stirring is kept for 1-2 hours.
Comparative example 3
The difference between the comparative example and the example 3 is that the pH of the ore after the slurry mixing in the pump tank is 7.5, and the pH of the ore after the slurry mixing in the stirring barrel is 7 and the stirring is kept for 0.5 to 1 hour.
Comparative example 4
The comparative example is different from example 3 in that the pH of the ore after the mixing in the mixing tank is 6.5 and the mixing is kept for 30-45 min.
The process of examples 1-4 and comparative examples 1-4 were applied to industrial production and the obtained sulfur concentrate grade and sulfur concentration recovery are shown in the following table:
| grouping | Grade of sulphur concentrate | Recovery rate of sulfur concentration | Yield of overflow loss | Recovery of lost sulfur |
| Example 1 | 48.8% | 71.9% | 8.4% | 4.7% |
| Example 2 | 48.2% | 72.5% | 7.3% | 4.1% |
| Example 3 | 47.8% | 72.8% | 6.8% | 3.8% |
| Example 4 | 47.2% | 73.2% | 6.5% | 3.0% |
| Comparative example 1 | 47.8% | 68.5% | 15.2% | 8.4% |
| Comparative example 2 | 47.2% | 68.8% | 13.5% | 7.7% |
| Comparative example 3 | 46.9% | 70.2% | 12.7% | 7.1% |
| Comparative example 4 | 46.5% | 70.9% | 11.9% | 6.9% |
Comparing the above results, it can be seen that the following three process improvements can both improve the sulfur concentrate grade and the sulfur concentration recovery, and reduce the yield of the overflow loss and the sulfur recovery of the loss: (1) guiding the middlings obtained by sulfur scavenging twice into a copper tail dealkalization cyclone for secondary activation and desliming; (2) after the second-time sulfur scavenging middlings are led into a pump pool, acid water and clear water are added through the pump pool to mix and size, and the classified settled sand enters a stirring barrel to be supplemented with the acid water to mix and size again to realize third-time sulfur activation; (3) and (3) carrying out sectional type size mixing on the minerals in the stirring barrel, wherein different intervals are set between the pH = 6.5-8.0.
The invention has the beneficial effects that: the invention provides a production process for obtaining sulfur concentrate from copper tailings, which effectively improves the recovery rate of sulfur concentration and the grade of sulfur concentrate by reducing the yield of overflow loss and the recovery rate of sulfur loss.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features thereof can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A production process for obtaining sulfur concentrate from copper tailings is characterized by comprising the following steps: the method comprises the following process steps:
s1, enabling the copper tailings to enter a transmission type thickener and be extruded and thickened by a rake rack, enabling the thickened ore pulp to enter an ore drawing pool to form a thickener bottom liquid, and discharging the thickener supernatant along with an overflow port to serve as primary tailing throwing to a tailing pool;
s2, enabling the bottom liquid of the thickener to enter a rubber lining pump, conveying the bottom liquid of the thickener to a copper tail dealkalization slurry pump by the rubber lining pump, continuously pumping the copper tail dealkalization slurry pump to a copper tail dealkalization cyclone group for classification, enabling the classified settled sand to enter a copper tail dealkalization stirring barrel, then entering a flotation machine to start a sulfur selection process, and discharging dealkalization overflow substances along with an overflow port as secondary tail throwing to a tailing pond;
s3, after the settled sand enters a sulfur selecting process, sulfur sweeping a middling back to restart the sulfur selecting process through a first coarse sweeping, a third sweeping and a fine sweeping, the sulfur sweeping an overflow mineral enters a sulfur sweeping second, the middling obtained by the sulfur sweeping second is led into a pump pool of a copper tail dealkalization slurry pump, and then the middling is pumped to a copper tail dealkalization cyclone through a slurry pump to carry out secondary activation and desliming;
s4, enabling the minerals overflowing from the sulfur scavenging II to enter a sulfur scavenging III, returning the middlings obtained from the sulfur scavenging III to the upper stage to restart the sulfur scavenging II, and using the minerals overflowing from the sulfur scavenging III as sulfur tailings for underground filling;
and S5, thickening the finally obtained sulfur concentrate product in a concentrate thickener.
2. The process of claim 1, wherein the production process comprises the following steps: the ore drawing pond is connected to driven type thickener bottom, the tailing storehouse is connected to driven type thickener's overflow mouth, the ore drawing pond is connected and is lined with the glue pump, line glue pump connection copper tail dealkalization sediment stuff pump, copper tail dealkalization stuff pump connection copper tail dealkalization swirler group, copper tail dealkalization agitator is connected to copper tail dealkalization swirler group's bottom, the tailing storehouse is connected to copper tail dealkalization swirler group's overflow mouth, flotation machine is connected to copper tail dealkalization agitator.
3. The process of claim 1, wherein the production process comprises the following steps: be equipped with the foam groove in the two flows are swept to sulphur, the foam groove is equipped with the feed inlet, defeated thick liquid pipe is connected to the feed inlet, defeated thick liquid pipe is connected with the acid water piping, the acid water piping is gone into copper tail dealkalization sediment stuff pump pond.
4. The process of claim 1, wherein the production process comprises the following steps: a cylindrical deslagging screen is arranged in the pump pool of the copper tail dealkalization slurry pump, and the sulfur swept secondary middlings led into the pump pool are centrifugally separated from ore pulp and impurities through the cylindrical deslagging screen.
5. The process of claim 1, wherein the production process comprises the following steps: and step S3, further comprising the steps of adding acid water and clear water through the pump pond for mixing and size mixing after the sulfur swept secondary middlings are introduced into the pump pond, and feeding the classified settled sand into a stirring barrel for adding the acid water for size mixing again to realize the third sulfur activation.
6. The process of claim 5, wherein the production process of obtaining the sulfur concentrate from the copper tailings comprises the following steps: the pH value of the ore after the slurry mixing in the pump pool is 7.5-8, the pH value of the ore after the slurry mixing in the stirring barrel is 7.2-7.5 and the stirring is kept for 1-2h, then the acid water is continuously used for slurry mixing to ensure that the pH value is 7-7.2 and the stirring is kept for 0.5-1h, and then the pH value is continuously adjusted to 6.5-7 and the stirring is kept for 30-45 min.
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Cited By (1)
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| CN115155794A (en) * | 2022-06-17 | 2022-10-11 | 白银有色集团股份有限公司 | Flotation process for recovering and producing sulfur concentrate from flotation tailings |
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Effective date of registration: 20220804 Address after: 335400 Yin Lu Ling, Lengshui Town, Guixi City, Yingtan City, Jiangxi Province Patentee after: Jiangxi Jiangtong yinzhushan Mining Co.,Ltd. Address before: 331812 Fenglin, Xiaogang Town, Dongxiang District, Fuzhou City, Jiangxi Province Patentee before: JIANGXI COPPER GROUP DONGTONG MINING INDUSTRY Co.,Ltd. |