CN115259459A - Method for internal recycling of grading branch wastewater flow of concentrating mill - Google Patents
Method for internal recycling of grading branch wastewater flow of concentrating mill Download PDFInfo
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- CN115259459A CN115259459A CN202210912685.1A CN202210912685A CN115259459A CN 115259459 A CN115259459 A CN 115259459A CN 202210912685 A CN202210912685 A CN 202210912685A CN 115259459 A CN115259459 A CN 115259459A
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000002351 wastewater Substances 0.000 title claims abstract description 48
- 238000004064 recycling Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 21
- 239000011707 mineral Substances 0.000 claims abstract description 21
- 238000005188 flotation Methods 0.000 claims abstract description 20
- 239000002562 thickening agent Substances 0.000 claims abstract description 19
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 239000008394 flocculating agent Substances 0.000 claims abstract description 11
- 238000004062 sedimentation Methods 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000000498 ball milling Methods 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims description 22
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 11
- 229910052718 tin Inorganic materials 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 4
- 229910052785 arsenic Inorganic materials 0.000 claims description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 4
- LVYZJEPLMYTTGH-UHFFFAOYSA-H dialuminum chloride pentahydroxide dihydrate Chemical compound [Cl-].[Al+3].[OH-].[OH-].[Al+3].[OH-].[OH-].[OH-].O.O LVYZJEPLMYTTGH-UHFFFAOYSA-H 0.000 claims description 3
- 230000002000 scavenging effect Effects 0.000 claims description 3
- 239000005083 Zinc sulfide Substances 0.000 claims description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims description 2
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 2
- 239000003814 drug Substances 0.000 abstract description 10
- 229910001111 Fine metal Inorganic materials 0.000 abstract description 4
- 239000004576 sand Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 8
- 239000011701 zinc Substances 0.000 description 8
- 229910052725 zinc Inorganic materials 0.000 description 8
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
Abstract
A method for recycling the wastewater in the flow path of the ore dressing plant by the branch of the grading comprises the following steps: (1) Carrying out physical sedimentation on the beneficiation backwater by using a square bucket and a pool, and taking overflow water as feed water for ore grinding and jigging operation; (2) Wastewater generated by the ball-milling full-floating system is precipitated by a thickener and a flocculating agent with the total dosage of 30 percent of the total flow, and then is used as make-up water for the operation of a flotation section and a conical spiral chute; (3) The wastewater with finer relative ore granularity and larger residual medicament amount is settled by a thickener, a flocculating agent with 70 percent of the total dosage of the whole process is added, and the overflow water is used as the make-up water of partial operation; (4) The waste water after on-site recycling enters a tailing dam together with tailings, and is used as make-up water for concentration in a plant and preparation operation of a medicament after precipitation. Realizes the internal circulation of the full-flow sectional branched quality-divided wastewater and improves the returning rate of the micro-fine metal minerals.
Description
Technical Field
The invention relates to a method for treating mineral separation backwater of various metal minerals, in particular to a method for internal recycling of a sectional, quality-divided and branched wastewater flow of a concentrating mill.
Background
The heavy-floating-repeated impurity combined mineral processing flow has the disadvantages of large water consumption, large difference of water quality requirements of each operation, large flocculant consumption, high treatment method cost, long flow, low wastewater recycling, large control difficulty and the like, and the following problems exist in the flow:
(1) The flow process fails to overcome the influence of residual medicament
Because the flotation process mainly considers the recovery of metals of tin and zinc and sulfur, a large amount of residual medicaments which are not beneficial to lead flotation enter the lead flotation, so that minerals such as zinc, sulfur and the like are difficult to inhibit, and the influence of the residual medicaments in return water on the flotation cannot be overcome fundamentally by increasing the medicament dosage in production.
(2) The flow can not overcome the problem of water consumption
Because of the influence of the residual medicament in the flotation on the flotation system, on one hand, the medicament dosage is increased, and on the other hand, the residual medicament dosage in the return water is diluted by adding new water, so that the flotation index is qualified. However, the recycling of the return water in the system is reduced while the consumption of the new water is increased, and the new water has the outstanding problems of long water supply line, low return water speed, more water supply equipment and the like, so that the outstanding problems of high water supply energy consumption, high production water consumption, low water recycling rate and the like are caused.
(3) The different water quality requirements of different processes
Because of different requirements on water quality in the operation processes of ore grinding, jigging, flotation and the like, simple ore dressing and backwater mixing easily causes resource waste, increases energy consumption and reduces the production index of each operation section.
Disclosure of Invention
According to different requirements of operations on water quality in the heavy-floating-heavy combined flow, the requirements on water quality for operations such as ore grinding sand pump jigging and the like are low, and the operation requirements can be met by arranging a square bucket and a pool on site for simple water after physical settlement; the operation of the flotation roughing scavenging table and the like has higher requirement on water quality, so that the waste water obtained by adding a small amount of flocculating agent into the beneficiation waste water and simply precipitating can meet the operation requirement; the operation with higher requirements on water quality in the operations of flotation concentration, medicament preparation and the like is added with the flocculant for further collecting and precipitating, and then the flocculant is combined with the water precipitated in a tailing pond in a large capacity and a long distance to meet the operation requirements. These are not achievable by the prior art. Accordingly, the method for internal recycling of the wastewater flow of the grading branch of the concentrating mill is provided.
In order to achieve the purpose, the invention adopts the following technical scheme: the method for internal recycling of the sectionalized and quality-divided branch wastewater flow of the concentrating mill is provided, and the specific operation steps are as follows:
(1) Simple physical sedimentation is carried out on the mineral separation backwater by using a square bucket and a pool, and overflow water returns to the operations of ore grinding and jigging through a pump;
(2) Wastewater generated by the ball-milling full-floating system is settled by a thickener and a flocculating agent with the total dosage of 30 percent of the total flow, and the recovered wastewater is supplied to water for the operations of flotation roughing, scavenging and conical spiral chute;
(3) Waste water generated by lead-zinc sulfide ore flotation and fine mud system operation is settled by a thickener, a flocculating agent with the total consumption of 70 percent of the total flow is added, and the waste water generated after the assisted settlement can be used as make-up water for partial operation;
(4) After the in-process wastewater is recycled on site, the rest wastewater and tailings of the concentrating mill are raised into a tailing dam together, the high-quality wastewater which is generated after the large-capacity long-distance in a tailing pond and the precipitation of a flocculating agent is added serves as make-up water for concentrating table of the concentrating mill, flotation concentration and reagent preparation operation, and the full-process branch quality-grading segmented wastewater is recycled in situ.
And (2) after the square hopper and the pool in the step (1) are settled, the content of minus 0.037mm in the overflow water is 1.0%.
The flocculating agents in the steps (2) and (3) are nonionic polyacrylamide: mixtures of aluminum chlorohydrate at all concentrations of 0.1%.
The content of-0.037 mm in the overflow water of the thickener in the step (2) is 0.3 percent.
The content of-0.037 mm in the overflow water of the thickener in the step (3) is 0.1 percent.
And (3) mixing high-quality overflow water and tailing backwater generated after long-distance and flocculant-added precipitation in the step (4), wherein the content of-0.037 mm is 0.0008%.
The invention has the beneficial effects that:
1. the harmful influence of residual agents recovered in the flotation process in the flow on the flotation is overcome, and the dosage of the agents in the flotation process is reduced.
2. Realizes the flocculation and sedimentation of the micro-fine grade metal and creates favorable conditions for recovering the micro-fine grade target mineral.
3. Solves the problem of water for production. Through the internal circulation of the water return flow, the supply amount of new water is reduced, the use of water resources is reduced, the water circulation utilization rate is improved, and sufficient production water is provided for production.
4. Because the shortening of water supply pipeline and the reduction of water supply equipment, very big facility is provided for maintenance management.
Drawings
FIG. 1 is a process flow diagram of the method for internal recycling of the wastewater of the concentrating mill by the sectional and quality-divided branch flow.
Detailed Description
The technical solution of the present invention is further described in detail by examples below.
Example 1
This embodiment is an example of the method for recycling the wastewater from the concentrating mill by the branch flow,
aiming at a complex mineral separation process of mineral separation process 'heavy-float-heavy' of a polymetallic ore containing arsenic and tin in Guangxi ore, which is stage grinding stage selection, full-float return-to-queue re-separation of sulfide ore and centralized treatment of fine mud, the property difference of waste water generated by each process section and the requirement of each mineral separation process on required make-up water are different, wherein the grades of tin, zinc and lead in raw ore are respectively as follows: 0.56 percent; 2.00 percent; 0.45 percent; a step-by-step branch wastewater internal circulation method is provided, which comprises the following steps:
(1) Firstly, a square hopper and a pool are utilized to carry out simple physical sedimentation on mineral separation backwater, and overflow water of the square hopper and the pool is used for mineral separation water in grinding and jigging operations.
(2) After sand setting of the square bucket and the pool and overflow water generated by dewatering equipment at each point in the gravity separation overflow operation of the front section and the rear section of the whole process are converged, the converged water enters a first-section thickener, simultaneously 30% of mixed flocculant in the whole process is added, the sand setting is used as fine mud for feeding, and the overflow water enters a second-section thickener.
(3) And adding 70% of mixed flocculant in the whole process into the first-stage overflow water for secondary sedimentation, wherein settled sand is used as fine particles for feeding, and the overflow water and tailing backwater are mixed to be used as production water in the mineral separation process.
In this example, the +200 mesh solids content of the (1) overflow water was 0.3%. The flocculant of (2) is nonionic polyacrylamide: mixtures of aluminum chlorohydrate; the content of 200 meshes in the overflow water of the first-stage thickener is 0.1 percent; the 200-mesh content of the second-stage overflow water in the step (3) before transformation is 0.0008%.
In the embodiment, the grouping rate of the micro-fine metal can be better improved, wherein: the grouping rate of tin metal is 8.50 percent; the zinc metal convoy rate is 9.98 percent; the lead metal return rate is 19.28 percent.
Example 2
This embodiment is an example of the method for recycling the wastewater from the concentrating mill by the branch flow,
aiming at a complex mineral separation process that a mineral separation process of a polymetallic ore containing arsenic and tin of a certain ore is a stage grinding stage selection, a sulfide ore is separated after being completely floated and then is treated, and fine mud is treated in a centralized way, the property difference of waste water generated by each process section and the requirement of each mineral separation process on required make-up water are different, wherein the grades of tin, zinc and lead in raw ore are respectively as follows: 0.59 percent; 1.89 percent; 0.76 percent; a step-by-step branch waste water internal circulation method is provided, which comprises the following steps:
(1) Firstly, a square hopper and a pool are utilized to carry out simple physical sedimentation on mineral separation backwater, and overflow water of the square hopper and the pool is used for mineral separation water in grinding and jigging operations.
(2) After sand setting of the square bucket and the pool and overflow water generated by dewatering equipment at each point in the gravity separation overflow operation of the front section and the rear section of the whole process are converged, the converged water enters a first-section thickener, simultaneously 30% of mixed flocculant in the whole process is added, the sand setting is used as fine mud for feeding, and the overflow water enters a second-section thickener.
(3) And adding 70% of mixed flocculant in the whole process into the first-stage overflow water for secondary sedimentation, wherein settled sand is used as fine particles for feeding, and the overflow water and tailing backwater are mixed to be used as production water in the mineral separation process.
In this example, the +200 mesh solids content of the (1) overflow water was 0.3%. The flocculant (2) is nonionic polyacrylamide: a basic aluminum chloride mixture; the content of 200 meshes in the overflow water of the first-stage thickener is 0.1 percent; the 200-mesh content of the second-stage overflow water in the step (3) before transformation is 0.0008%.
In the embodiment, the grouping rate of the micro-fine metal can be better improved, wherein: the convoy rate of tin metal is 8.30 percent; the zinc metal convoy rate is 10.32 percent; the lead metal formation rate is 16.34%.
Example 3
This embodiment is another application example of the method for recycling wastewater from a concentrating mill by stages and branch according to the present invention,
aiming at the complex ore dressing process that the ore dressing process of polymetallic ore containing arsenic and tin in a certain ore in Yunnan is a stage ore grinding stage sorting, sulfide ore is separated after being floated and returned, and fine mud is treated in a centralized way, the property difference of waste water generated by each process section and the requirement of each ore dressing process on required make-up water are different, a step-by-step branch waste water internal circulation method is provided, wherein the grades of tin, zinc and lead in the raw ore are respectively as follows: 0.43 percent; 2.23 percent; 0.55 percent; the method is characterized in that: the recovery process flow of the method comprises the following steps:
(1) Firstly, a square hopper and a pool are utilized to carry out simple physical sedimentation on beneficiation backwater, and overflow water of the beneficiation backwater is used as beneficiation water for ore grinding and jigging operation.
(2) After sand setting of the square hopper and the pool and overflow water generated by dewatering equipment at each point in the gravity separation overflow operation of the front section and the rear section of the whole process are converged, the converged water enters a first-section thickener, simultaneously 30% of mixed flocculant in the whole process is added, the sand setting serves as fine mud for feeding ores, and the overflow water enters a second-section thickener.
(3) And adding 70% of mixed flocculant in the whole process into the first-stage overflow water for secondary sedimentation, wherein settled sand is used as fine particles for feeding, and the overflow water and tailing backwater are mixed to be used as production water in the mineral separation process.
In this example, the solid content (+ 200 mesh) content in the (1) overflow water was 0.3%. The flocculant (2) is nonionic polyacrylamide: a basic aluminum chloride mixture; the content of 200 meshes in the overflow water of the first-stage thickener is 0.1 percent; the 200-mesh content of the second-stage overflow water in the step (3) before transformation is 0.0008%.
In the embodiment, the grouping rate of the micro-fine metal can be better improved, wherein: the convoy rate of tin metal is 9.38%; the zinc metal convoy rate is 8.87%; the lead metal formation rate is 21.34%.
Claims (7)
1. A method for internal recycling of wastewater in a grading branch flow of a concentrating mill is characterized by comprising the following specific operation steps:
(1) Carrying out physical sedimentation on the mineral separation backwater by using a square bucket and a pool, and returning overflow water to the operations of grinding and jigging through a pump;
(2) Wastewater generated by the ball-milling full-floating system is settled by a thickener and a flocculating agent with the total dosage of 30 percent of the total flow, and the recovered wastewater is supplied to water for the operations of flotation roughing, scavenging and conical spiral chute;
(3) Waste water generated by lead-zinc sulfide ore flotation and fine mud system operation is settled by a thickener, a flocculating agent with the total consumption of 70 percent of the total flow is added, and the waste water generated after the assisted settlement can be used as make-up water for partial operation;
(4) After the in-process wastewater is recycled on site, the rest wastewater and tailings of the concentrating mill are raised into a tailing dam together, the high-quality wastewater which is generated after the large-capacity long-distance in a tailing pond and the precipitation of a flocculating agent is added serves as make-up water for concentrating table of the concentrating mill, flotation concentration and reagent preparation operation, and the full-process branch quality-grading segmented wastewater is recycled in situ.
2. The method for the internal recycling of the wastewater from the grading and branching processes of the concentrating mill according to claim 1, wherein the content of-0.037 mm in the overflow water is 1.0% after the square buckets and the pools are settled in the step (1).
3. The method for the internal recycling of the wastewater flow of the grading and branching of the concentrating mill according to claim 1, wherein the flocculating agents of the steps (2) and (3) are nonionic polyacrylamide: mixtures of aluminum chlorohydrate were all 0.1% in concentration.
4. The method for the internal recycling of the wastewater from the branch grading wastewater process of the concentrating mill according to claim 1, wherein the concentration of-0.037 mm in the overflow water of the thickener in the step (2) is 0.3%.
5. The method for the internal recycling of the wastewater from the branch grading wastewater process of the concentrating mill according to claim 1, wherein the concentration of-0.037 mm in the overflow water of the thickener in the step (3) is 0.1%.
6. The method for the internal recycling of the wastewater from the branch of the concentrating mill according to claim 1, wherein the high quality overflow water produced in the step (4) after long-distance precipitation by adding flocculant is mixed with the tailings backwater, and the content of 0.0008% in the overflow water is-0.037 mm.
7. The application of the method for internal recycling of the graded branch wastewater flow of the concentrating mill in the heavy-float-heavy combined flow of the polymetallic ore containing arsenic and tin according to claim 1 is characterized in that the heavy-float-heavy combined flow refers to a complex concentrating process of stage ore grinding stage separation, full-float return to the team of sulfide ores for re-separation and fine mud centralized treatment.
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