CN114054216A - Method and equipment for improving separation and flotation concentration of bulk concentrate - Google Patents
Method and equipment for improving separation and flotation concentration of bulk concentrate Download PDFInfo
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- CN114054216A CN114054216A CN202111343469.1A CN202111343469A CN114054216A CN 114054216 A CN114054216 A CN 114054216A CN 202111343469 A CN202111343469 A CN 202111343469A CN 114054216 A CN114054216 A CN 114054216A
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- 239000012141 concentrate Substances 0.000 title claims abstract description 117
- 238000000926 separation method Methods 0.000 title claims abstract description 77
- 238000005188 flotation Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 66
- 239000007787 solid Substances 0.000 claims abstract description 29
- 239000002562 thickening agent Substances 0.000 claims abstract description 27
- 239000000575 pesticide Substances 0.000 claims abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 18
- 239000006260 foam Substances 0.000 claims description 17
- WIKSRXFQIZQFEH-UHFFFAOYSA-N [Cu].[Pb] Chemical compound [Cu].[Pb] WIKSRXFQIZQFEH-UHFFFAOYSA-N 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 12
- 239000011859 microparticle Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000003153 chemical reaction reagent Substances 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002184 metal Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002923 metal particle Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000013043 chemical agent Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910001111 Fine metal Inorganic materials 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2444—Discharge mechanisms for the classified liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
- B01D21/286—Means for gentle agitation for enhancing flocculation
-
- 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
- B03D1/14—Flotation machines
-
- 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
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for improving the separation and flotation concentration of bulk concentrates, which comprises the following steps: 1. the mixed concentrate pulp scraped by the mixed concentration flotation machine is conveyed into a middling box through a mixed concentrate conveying pipeline; 2. performing physical and mechanical pesticide removal treatment on the mixed concentrate pulp thrown into the middling box; 3. the mixed concentrate pulp after the drug-removing treatment is pumped into a liquid-solid separation thickener for concentration; 4. and sucking the concentrated and adjusted bulk concentrate pulp into a lifting stirring barrel. The method improves the low separation flotation concentration to the proper concentration, plays a vital role in improving the recovery rate of ore dressing and obtaining qualified products, is simple and safe to operate, stabilizes production and increases economic benefit. The invention also discloses equipment for improving the separation and flotation concentration of the bulk concentrate.
Description
Technical Field
The invention relates to a method and equipment for improving the separation and flotation concentration of bulk concentrates.
Background
The pulp flow in the existing process flow is as follows: 1. the first and second series of mixed concentrate pulp → enters a middling de-dosing tank for de-dosing treatment → enters a middling pump for controlling the rotation speed of the middling pump through frequency conversion, so that the purpose of uniform ore feeding is achieved → the middling pump is driven into a lifting stirring barrel for stirring → finally enters a separation flotation system, and the separation work of mixed concentrate copper and lead is completed. In the production process of recent years, when copper and lead bulk concentrates are subjected to separation flotation, the bulk concentrates have high mutual content and are difficult to separate, so that the metal recovery rate and the concentrate quality are reduced. In order to avoid the situation, the reason for influencing the difficult separation of the mixed concentrate is searched, the ore property, the grinding fineness, the chemical agent system and the flotation concentration are searched, the situation that the separation is difficult is determined mainly by comparing, analyzing and determining that the flotation concentration in the separation process of the mixed concentrate is lower and exceeds the flotation concentration critical value required by the mineral separation, the floating useful metal concentrate has particularly high grade and particularly good quality through the adjustment of the separation chemical agent of the normal mixed concentrate, the useful metal flowing away from the flotation underflow is not completely controlled by the chemical agent because the flotation concentration is lower than 6 percent, and all impurities in the metal separation are gathered in the metal of the underflow, so that the grade of the useful metal concentrate of the underflow is particularly low and cannot completely meet the mineral separation requirement. Sometimes, the economic benefit of the company is affected because the useful metals are contained in high quantity and the recovery rate is low because the medicament is not adjusted in time.
Disclosure of Invention
In order to overcome the situation that when the bulk concentrates are separated and floated, the bulk concentrates are high in mutual content and difficult to separate, so that the metal recovery rate and the quality of the concentrates are reduced. The invention discloses a method for improving the separation and flotation concentration of bulk concentrate, which improves the low separation and flotation concentration to the proper concentration, plays an important role in improving the recovery rate of ore dressing and obtaining qualified products, is simple, convenient and safe to operate, can stabilize production and increases economic benefit.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for improving the separation flotation concentration of bulk concentrate comprises the following steps:
1. the mixed concentrate pulp scraped by the mixed concentration flotation machine is conveyed into a mixed concentrate conveying foam pump by using brewing water through a mixed concentrate conveying pipeline, and the mixed concentrate pulp is conveyed into a middling box through a mixed concentrate conveying pipeline by the operation of the mixed concentrate conveying foam pump;
2. adding activated carbon into the mixed concentrate pulp pumped into the middling box to carry out physical reagent removal through a disc feeder, fully stirring the pulp through a stirrer, carrying out mechanical reagent removal treatment, and enabling the pulp to enter a middling pump to uniformly feed the pulp by controlling the rotating speed of the middling pump through variable frequency;
3. pumping the mixed concentrate pulp subjected to the reagent removal treatment in the step (2) into a liquid-solid separation thickener for concentration through a slurry pump, and performing descending precipitation and clear water top overflow treatment on the concentrate;
4. the concentrated and adjusted bulk concentrate pulp is sucked into a lifting stirring barrel through an underflow high-concentration pulp discharge pipe, and after the full stirring work of the added medicament required by the bulk concentrate pulp and a lower copper-lead separation flotation system is completed in the lifting stirring barrel, the bulk concentrate pulp enters a copper-lead separation flotation machine through a bulk concentrate conveying pipeline to complete the copper-lead separation work; and after the excessive clear water in the settled and clarified bulk concentrate is collected by an overflow groove at the top of the liquid-solid separation thickener, the excessive clear water is conveyed into a 6-meter thickener of lead concentrate in a flotation system through an overflow water pipe, and the excessive clear water and the qualified lead concentrate discharged by separation flotation are simultaneously concentrated and dehydrated.
The invention also discloses equipment of the method for improving the separation and flotation concentration of the bulk concentrate, which comprises a bulk concentration flotation machine, a bulk concentrate delivery foam pump, a middling box, a slurry pump, a liquid-solid separation thickener, a lifting stirring barrel and a copper-lead separation flotation machine;
the bulk concentrate pulp scraped by the bulk concentration flotation machine is communicated with a bulk concentrate delivery foam pump through a bulk concentrate delivery pipeline, the bulk concentrate delivery foam pump is communicated with a middling box through the bulk concentrate delivery pipeline, a discharge port of the middling box is communicated with a slurry pump through the bulk concentrate delivery pipeline, the slurry pump is communicated with a square tubular spiral tangent feeding pipe of a liquid-solid separation thickener through the bulk concentrate delivery pipeline, an underflow high-concentration pulp discharge pipe is communicated with a lifting stirring barrel, and the lifting stirring barrel is communicated with the copper-lead separation flotation machine through a pipeline.
Further, the liquid-solid separation thickener consists of a lifting device part, a driving device, a box body part, a central steady flow feeding device part and a stirring main shaft part; the lifting device part comprises a lifting lead screw, a nut handle, a bearing, a lifting device bracket, a bearing box, a connecting shaft pin and a bearing box bracket; the driving device comprises a cycloidal pin gear speed reducer, a pin coupling, a worm and gear speed reducer, a fastening bolt and a stirring driving support; the box body part comprises a box body, an overflow groove, a box body pillar, a conical funnel, a discharge hole, a bottom discharge hole and an overflow drain outlet; the central steady flow feeding device comprises a cylindrical steady flow cylinder, a spiral tangent feeding pipe, a cylindrical steady flow cylinder support, an umbrella-shaped distributing disc and an umbrella-shaped flange plate support; the stirring main shaft part comprises a stirring main shaft upper part, a stirring main shaft lower part, a connecting flange, a conical helical blade stirrer and a stirring bottom bearing; the lifting device comprises a lifting device part, a bearing box is installed on a bearing box support, the bearing box support is welded on the upper portion of the lifting device support, the lifting device support is welded on a stirring driving support, the stirring driving support is welded on the upper portion of a box body, a lifting lead screw and the upper portion of a stirring main shaft are connected and fixed, a turbine worm speed reducer is installed on the stirring driving support in the center position, the cycloidal pin wheel speed reducer is connected with the turbine worm speed reducer through a pin coupler, the cycloidal pin wheel speed reducer is installed on the stirring driving support, a box body support is welded on the lower portion of the box body, an overflow groove is welded on the upper portion inside the box body, an overflow water outlet is welded on the parallel and level position of the bottom of the overflow groove, a conical funnel is welded on the center position of the bottom of the box body, the center of a discharge hole is vertically welded on the side face of the conical funnel, and the discharge hole is welded on the center position of the bottom of the conical funnel. The stirring device comprises a cylindrical flow stabilizing cylinder, a stirring driving support, a box body, a spiral tangent feeding pipe, an umbrella-shaped material distribution plate, an umbrella-shaped flange plate support, a turbine worm speed reducer hollow transmission shaft, a lifting screw rod, a connecting shaft pin and a lifting screw rod, wherein the cylindrical flow stabilizing cylinder is fixedly connected below the stirring driving support through a cylindrical flow stabilizing cylinder support and is located at the positive center of the box body, the spiral tangent feeding pipe is welded inside the cylindrical flow stabilizing cylinder, the umbrella-shaped material distribution plate umbrella-shaped flange plate support is fixedly connected at the positive center of the bottom of the cylindrical flow stabilizing cylinder, the top end of the upper portion of a stirring main shaft is installed inside the turbine worm speed reducer hollow transmission shaft, the connecting shaft pin and the lifting screw rod are connected to form an integral structure, the bottom end of the lower portion of the stirring main shaft is installed into a stirring bottom bearing and then is connected through the connecting flange to form a main shaft whole, a conical helical blade stirrer is welded at the lower position of the stirring main shaft, and the stirring bottom bearing is fixedly installed on the bottom surface inside a conical funnel.
Further, a 45-degree micro-particle material blocking and flow stabilizing settler with a PVC plastic inclined plate with the vertical height of 400 mm is designed and installed at the position of 100 mm to 500 mm below the upper weir of the overflow chute.
Further, the micro-particle material blocking and flow stabilizing settler is a PVC plastic inclined plate 45-degree micro-particle material blocking and flow stabilizing settler.
The invention has the following beneficial effects:
1. the process of the invention improves the low separation flotation concentration to the proper concentration, plays a key role in improving the recovery rate of ore dressing and obtaining qualified products, has simple, convenient and safe operation, stabilizes production and increases economic benefit; 2. the middling box of the equipment is an original middling stripping box which is additionally provided with a small stirrer, so that active carbon and ore pulp in the original stripping box are fully stripped through stirring, and simultaneously, a defoaming effect is achieved, and the loss of fine particle concentrate wrapped by overflow water after foam enters a liquid-solid separation thickener is prevented; 3. the liquid-solid separation thickener utilizes the cycloidal pin gear speed reducer and the worm gear speed reducer to assemble the two-stage speed reduction combination, and the design can achieve the effects of low power, low rotating speed and high torque; 4. the liquid-solid separation thickener utilizes a cylindrical spiral tangent feed cylinder, and the design can stabilize the flow, buffer and prevent the ore pulp from running and mixing; 5. the liquid-solid separation thickener utilizes a square tubular spiral tangent feeding pipe, and the design can achieve the effects of stabilizing the flow, buffering, preventing ore pulp from mixing and feeding at the bottom; 6. the conical blade spiral stirrer of the liquid-solid separation thickener can achieve low-rotating-speed and high-torque stirring, and achieves the aim of uniformly discharging ores in real time.
Drawings
FIG. 1 is a schematic structural view of the present invention;
1-1, mixing and selecting a flotation machine; 1-2, a first mixed concentrate conveying pipeline; 1-3, a bulk concentrate delivery foam pump; 1-4, a second mixed concentrate conveying pipeline; 2-1, a disk feeder; 2-2, a stirrer; 2-3, a manual gate valve; 2-4, a third mixed concentrate conveying pipeline; 2-5, a slurry pump; 2-6, a mixed concentrate conveying pipeline IV; 3-1, a turbine speed reducer; 3-2, a cycloidal pin gear speed reducer; 3-3, a conical helical blade stirrer; 3-4, a square tubular spiral tangent feeding pipe; 3-5, an overflow groove; 3-6, an overflow water pipe; 3-7 inch underflow concentration adjusting water pipe; 3-8 parts of umbrella-shaped material distribution disc; 3-9 parts of an electric hydraulic wear-resistant gate valve; 3-10, underflow high-concentration ore pulp discharge pipes; 3-11, a microparticle material blocking and flow stabilizing settler; 3-12, a support of the microparticle material blocking and flow stabilizing settler; 3-13, an umbrella-shaped material distribution disc bracket; 3-14 agitator main shaft; 3-15; a pulp concentration meter; 3-16, electric ball valve; 4-1, lifting the stirring barrel; 4-2, a mixed concentrate conveying pipeline five; 4-3, a copper-lead separation flotation machine, 5 and a lead concentrate 6-meter thickener.
Detailed Description
A method for improving separation and flotation concentration of bulk concentrate comprises the steps of conveying bulk concentrate pulp scraped by a bulk concentrate flotation machine 1-1 into a bulk concentrate conveying foam pump 1-3 through a bulk concentrate conveying pipeline 1-2 by using brewing water, conveying the bulk concentrate pulp into a middling box through a bulk concentrate conveying pipeline two 1-4 by operation of the bulk concentrate conveying foam pump 1-3, completing the operation of residual reagent removal in the bulk concentrate flotation in a previous section of the bulk concentrate flotation machine, wherein the middling box is novel reagent removal equipment integrating stirring of a stirrer, defoaming and feeding of a disk feeder, and after the bulk concentrate pulp thrown into the middling box is stirred by the stirrer, active carbon added by the disk feeder 2-1 and the pulp are fully and uniformly fused, and the incompletely ablated foam concentrate wrapped by the pulp at the upper section can be eliminated by stirring, the problem of original ordinary middling case medicine and ore pulp fuse inhomogeneously, and the upper segment comes the ore pulp in the parcel and carries partial concentrate foam, and the foam appears the trough excessively when the liquid level is high is solved.
After the mixed concentrate pulp subjected to reagent removal enters a slurry pump 2-5 through a mixed concentrate conveying pipeline three 2-4 at the inlet end of the slurry pump, the slurry pump 2-5 is designed in a parallel mode of one use and one standby, the mixed concentrate pulp subjected to reagent removal is pumped into a liquid-solid separation concentrator designed by self research and development by a mixed concentrate conveying pipeline four 2-6 to complete dehydration concentration, the center of the liquid-solid separation concentrator is a cylindrical spiral tangent feeding barrel, a square tubular spiral tangent feeding pipe (3-4) with the volume 3 times larger than that of a circular pipe with the same length is designed in the cylindrical spiral tangent feeding barrel, the design achieves the purposes of reducing the flow rate of the fed mixed ore pulp, the effect of buffering and stabilizing flow is achieved, and then the uniform and distributed bottom feeding is completed through an umbrella-shaped distributing plate 3-8.
In the process flow, the ore pulp is copper and lead bulk concentrate with large metal specific gravity, and copper and lead metal particles with the particle size of about 5 mu m-0.5 mm are all in the ore pulp, therefore, after part of coarse-grained metal particles enter the liquid-solid separation thickener, the sedimentation speed is higher, in order to prevent the blockage of the underflow high-concentration ore pulp discharge pipe 3-10 caused by the quick sedimentation, therefore, a stirring device consisting of a turbine speed reducer 3-1, a cycloidal pin gear speed reducer 3-2, a stirrer main shaft 3-14 and a conical helical blade stirrer 3-3 is designed and installed in the liquid-solid separation thickener, the device works at a rotating speed of 1.5 circles per minute, has low power, low rotating speed, high torque and good stability, and achieves the good effects of stirring and diluting the bottom high-concentration ore pulp, preventing the blockage of a bottom flow high-concentration ore pulp discharge pipe by 3-10 and preventing the floating of metal particles caused by stirring the bottom high-concentration ore pulp. The upper part of the liquid-solid separation thickener is of an equal-diameter square structure, the volume of the liquid-solid separation thickener is larger than that of an equal-diameter circular volume structure, the lower part of the liquid-solid separation thickener is conical, so that the liquid-solid separation thickener is convenient for the high-efficiency falling and sedimentation of materials, in order to prevent the ore concentrate loss caused by the fact that the settling velocity is slow due to the physical characteristics of thinner metal particles in the ore pulp and the upward floating loss of overflow water at the top of the ore pulp, a PVC plastic inclined plate (45-degree) micro-particle material blocking and flow stabilizing settler with the vertical height of 400 mm is designed and installed at a position 100 mm-500 mm below an upper weir of an overflow groove 3-5 of a liquid-solid separation concentrator, so that the upper liquid level in the liquid-solid separation concentrator is stabilized, and utilizes the method of obliquely arranging the PVC plastic plate at 45 degrees to separate the vertically floating fine metal particles in the upper liquid level so as to quickly descend and precipitate the fine metal particles, and the design also makes full use of the material characteristics of the PVC plastic plate that the PVC plastic plate is high in acid and alkali resistance, corrosion resistance, smooth in surface and difficult to bond materials.
After the bulk concentrates enter the liquid-solid separation thickener, the liquid level stabilization, the acceleration of material sedimentation, the low-speed stirring and uniform discharging and other work are completed through the technical means, and meanwhile, the discharge flow of the underflow high-concentration ore pulp of the liquid-solid separation thickener is controlled by utilizing the electric hydraulic wear-resisting gate valve 3-9 arranged on the underflow high-concentration ore pulp discharge pipe 3-10, so that the overflow flow of top clear water is controlled, and the expected target of the high-concentration bulk concentrate ore pulp required by a lower copper-lead separation flotation system is uniformly improved in real time in the production and use processes.
An ore pulp concentration meter 3-15 is designed and installed on an underflow high-concentration ore pulp discharge pipe 3-10, an electric ball valve 3-16 installed on an inch underflow concentration adjusting water pipe 3-7 is controlled through a sensing electric control system, when the concentration is higher than 20%, the electric ball valve 3-16 is opened to supply water for dilution, when the concentration is lower than 18%, the electric ball valve 3-16 is closed to stop supplying water to adjust the discharge concentration of the underflow high-concentration mixed concentrate ore pulp, so that the underflow concentration reaches the ore pulp concentration of 18% -20% required by a lower-section copper-lead separation flotation system in real time, and the design also efficiently utilizes partial overflow water discharged by an overflow water pipe 3-6, so that the concentration of the underflow ore pulp can be adjusted, and the good effect of using no new water is achieved. The mixed concentrate pulp meeting the requirement is automatically sucked by a lifting stirring barrel 4-1 through an underflow high-concentration pulp discharging pipe 3-10, after the stirring work of adding a medicament required by the mixed concentrate pulp and a lower copper-lead separation flotation system is completed, the mixed concentrate pulp enters a copper-lead separation flotation machine 4-3 through a mixed concentrate conveying pipeline 4-2 to complete the copper-lead separation work, an overflow groove 3-5 is designed at the top of a liquid-solid separation thickener, redundant clear water in the mixed concentrate subjected to sedimentation and clarification is collected through the overflow groove 3-5 and then is conveyed and discharged into an original lead concentrate 6 m thickener in the flotation system through an overflow water pipe 3-6, and the concentrated and dehydrated work is completed with qualified lead concentrate discharged by separation and flotation at the same time, so that the loss of a small amount of metal particles in the overflow water is prevented, and the work of recovering superfine metal is better completed.
Claims (5)
1. A method for improving the separation flotation concentration of bulk concentrate is characterized by comprising the following steps:
(1) the bulk concentrate pulp scraped by the bulk concentration flotation machine is conveyed into a bulk concentrate conveying foam pump by using brewing water through a bulk concentrate conveying pipeline, and the bulk concentrate pulp is conveyed into a middling box through a bulk concentrate conveying pipeline by the operation of the bulk concentrate conveying foam pump;
(2) adding active carbon into the mixed concentrate pulp thrown into the middling box through a disc feeder to carry out physical pesticide removal, and carrying out mechanical pesticide removal treatment after fully stirring through a stirrer;
(3) pumping the mixed concentrate pulp subjected to the reagent removal treatment in the step (2) into a liquid-solid separation thickener for concentration by a slurry pump, and performing descending precipitation and top overflow treatment on the concentrate;
(4) sucking the concentrated and adjusted bulk concentrate pulp into a lifting stirring barrel through an underflow high-concentration pulp discharge pipe, and after the full stirring work of the bulk concentrate pulp and the required added medicament of a lower copper-lead separation flotation system is completed in the lifting stirring barrel, feeding the bulk concentrate pulp into a copper-lead separation flotation machine through a bulk concentrate conveying pipeline to complete the copper-lead separation work; and after the excessive clear water in the settled and clarified bulk concentrate is collected by an overflow groove at the top of the liquid-solid separation thickener, the excessive clear water is conveyed into a 6-meter thickener (5) for lead concentrate in a flotation system through an overflow water pipe, and the excessive clear water and the qualified lead concentrate discharged by separation flotation are simultaneously concentrated and dehydrated.
2. The equipment of the method for improving the separation and flotation concentration of the bulk concentrate is characterized in that: comprises a mixed concentration flotation machine (1-1), a mixed concentrate delivery foam pump (1-3), a middling box, a slurry pump (2-5), a liquid-solid separation concentrator, a lifting stirring barrel (4-1) and a copper-lead separation flotation machine (4-3);
the bulk concentrate ore pulp scraped by the bulk concentration flotation machine (1-1) is communicated with a bulk concentrate delivery foam pump (1-3) through a bulk concentrate delivery pipeline I (1-2), the bulk concentrate delivery foam pump (1-3) is communicated with a middling box through a bulk concentrate delivery pipeline II (1-4), a discharge port of the middling box is communicated with a slurry pump (2-5) through a bulk concentrate delivery pipeline III (2-4), the slurry pump (2-5) is communicated with a square tubular spiral tangent feeding pipe (3-4) of a liquid-solid separation concentrator through a bulk concentrate delivery pipeline IV (2-6), a underflow high-concentration ore pulp discharge pipe (3-10) is communicated with a lifting stirring barrel (4-1), and the lifting stirring barrel is communicated with a copper-lead separation flotation machine (4-3) through a bulk concentrate delivery pipeline V (4-2).
3. The apparatus for increasing the separation flotation concentration of bulk concentrate according to claim 2, characterized in that: the liquid-solid separation thickener consists of a lifting device, a driving device, a box body part, a central steady flow feeding device and a stirring main shaft part;
the lifting device comprises a lifting lead screw, a nut handle, a bearing, a lifting device bracket, a bearing box, a first fastening bolt, a connecting shaft pin and a bearing box bracket;
the driving device comprises a cycloidal pin gear speed reducer, a pin coupling, a worm gear speed reducer, a fastening bolt II, a stirring driving support and a fastening bolt III;
the box part comprises a box body, an overflow groove, a conical funnel, a discharge hole, a bottom discharge hole, an overflow discharge port, a PVC plastic inclined plate 45-degree micro-particle material blocking and flow stabilizing settler and a blocking and flow stabilizing settler support;
the central steady flow feeding device comprises a cylindrical steady flow cylinder, a square tubular spiral tangent feeding pipe, a cylindrical steady flow cylinder bracket and an umbrella-shaped distributing disc;
the stirring main shaft part comprises a stirring main shaft upper part, a stirring main shaft lower part, a connecting flange, a conical helical blade stirrer and a stirring bottom bearing;
the bearing box is fixed on the bearing box bracket, the bearing box bracket is fixed at the upper part of the lifting device bracket, the lifting device bracket is fixed on the stirring driving bracket, the stirring driving bracket is fixed at the upper part of the box body, the turbine worm speed reducer is fixed at the central position on the stirring driving bracket, the cycloid pin wheel speed reducer is connected with the turbine worm speed reducer by a pin coupling, the cycloid pin wheel speed reducer is fixed on the stirring driving bracket, the overflow trough is fixed at the upper side in the box body, the overflow drainage outlet is fixed at the level position of the bottom of the overflow trough, the conical funnel is fixed at the central position of the bottom of the box body, the discharge outlet is arranged at the side surface of the conical funnel, the bottom discharge outlet is welded at the central position of the bottom of the conical funnel, the cylindrical steady flow cylinder is connected below the stirring driving bracket by a cylindrical steady flow cylinder bracket, the square tubular spiral tangent feeding pipe is fixed in the cylindrical steady flow cylinder, the umbrella-type divides the charging tray to connect and is fixed in cylinder stationary flow barrel bottom, and inside the stirring main shaft upper portion top passed turbine worm speed reducer machine cavity transmission shaft, utilized flat key and turbine worm speed reducer machine cavity hub connection, the concave part on stirring main shaft top was combined with promotion lead screw bottom bulge and is utilized connecting pin to connect, and stirring main shaft lower part bottom is connected with stirring end bearing, and stirring main shaft lower part utilizes flange to be connected with stirring main shaft upper portion, and toper helical blade agitator is fixed in stirring main shaft lower part position, and stirring end bearing is fixed in the inside bottom surface of circular cone funnel.
4. The apparatus for increasing the separation flotation concentration of bulk concentrate according to claim 3, characterized in that: and a micro-particle material blocking and flow stabilizing settler with the vertical height of 400 mm is designed and installed at the position of 100 mm to 500 mm below the upper weir of the overflow groove.
5. The apparatus for increasing the separation flotation concentration of bulk concentrate according to claim 3, characterized in that: the micro-particle material separation and flow stabilization settler is a PVC plastic inclined plate 45-degree micro-particle material separation and flow stabilization settler.
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| CN114054216B (en) | 2023-11-28 |
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