CN113735310B - Clear water and turbid water separation process - Google Patents
Clear water and turbid water separation process Download PDFInfo
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- CN113735310B CN113735310B CN202110999369.8A CN202110999369A CN113735310B CN 113735310 B CN113735310 B CN 113735310B CN 202110999369 A CN202110999369 A CN 202110999369A CN 113735310 B CN113735310 B CN 113735310B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 248
- 238000000926 separation method Methods 0.000 title claims abstract description 18
- 239000000706 filtrate Substances 0.000 claims abstract description 41
- 239000004744 fabric Substances 0.000 claims abstract description 38
- 239000013049 sediment Substances 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 239000012065 filter cake Substances 0.000 claims description 24
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 18
- 238000011010 flushing procedure Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000009776 industrial production Methods 0.000 claims description 4
- 239000006148 magnetic separator Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000010802 sludge Substances 0.000 abstract description 12
- 239000008235 industrial water Substances 0.000 abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 11
- 239000011707 mineral Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 9
- 238000004062 sedimentation Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a clear water and turbid water separation process, which comprises the following steps: step 1: pretreatment of ore pulp, namely, step 2: high-pressure filter pressing, step 3: selecting filter cloth, and step 4: turbidity of filtrate at different feed pressures, step 5: turbidity detection of different pulp feeding time, step 6: and (7) optimizing the gradient of the water receiving tank, and step 7: clear water and turbid water are separated, and step 8: clear water and turbid water are utilized, and step 9: and (5) treating sediment in a clear water turbidity water tank. According to the technical scheme, the water quality is continuously detected on line through turbidity and is immediately transmitted to a background control unit, an instruction is sent in real time according to a detection value, an electric gate valve is automatically opened and closed, clear water and turbid water are separated, different water quality classifications are reasonably utilized, and the industrial water standard is met, and the utilization rate is 100%; the separated sludge is settled and is transported and recovered in real time by a submerged electric pump, so that zero emission of the sludge is realized.
Description
Technical Field
The invention relates to a clear water turbid water separation process, in particular to a filter pressing, dehydration, desliming and water separation process for extremely fine tailings, and belongs to the field of tailings treatment in mineral separation industry production in the mine industry.
Background
The method is characterized in that the iron ore is lean and fine, the ore is required to be ground into fine particle size by multistage grinding, the ore is promoted to be dissociated and selected, iron ore concentrate is selected, a large amount of tailing pulp is produced at the same time, the tailing particle size is very fine, the conveying and piling up occupy land resources, environmental ecological risks are brought, the subsequent utilization can be realized by further reducing moisture, the filtering efficiency of a vacuum filter is low, the production capacity is limited, the method generally adopts a high-pressure filter press for treatment, a filter cake with lower moisture is produced, a small amount of fine tailings and a large amount of water can permeate filter cloth under the pressure effect, the filter cloth is called filtrate, the turbidity of the filtrate in the initial stage of the filter press pulp inlet is higher, along with the prolongation of the pulp inlet time, the surface of the filter cloth stores tailing filter cake with a certain thickness, only water permeates the filter cake and the filter cloth, the permeated filtrate is clear, and turbid is clear, and has no clear and turbid filtrate, and the clear water is generally used as the circulating water for production after all the filter cake is directly collected into a sedimentation tank for sedimentation due to no clear demarcation and enough importance.
The filter liquor of the tail coal filter press of the coal preparation factory is recycled, clear and turbid water is separated and stored, clear water is used as production water and sanitary water, turbid water is clarified again, an automatic control program of a time relay is set, when water is clear, a clear water electric gate valve is opened to close the turbid water electric gate valve, clear water enters a clear water tank, when water is turbid, the clear water electric gate valve is opened to close the clear water electric gate valve, and turbid water enters the turbid water tank.
The filter pressing filtrate of the coal washery is independently recovered, the turbidity of the filtrate is 100g/l, the granularity is-0.125 mm and accounts for 78%, the ash content is 11%, the granularity is fine, the density is low, the flocculant polyacrylamide is added to prepare 0.05% solution, the addition amount is 4ml/l, the solution is concentrated by a deep cone thickener, the turbidity of the underflow is 300g/l, the turbidity of the overflow is 70g/l, and the filtrate returns to the flotation machine to float and recycle coal. Therefore, a new solution is urgently needed to solve the above technical problems.
Disclosure of Invention
The invention provides a clean water turbid water separation process aiming at the problems existing in the prior art, the technical scheme is that the clean water turbid water separation process continuously detects the water quality on line through turbidity and immediately transmits the water quality to a background control unit, and an instruction is sent in real time according to the detection value, an electric gate valve is automatically opened and closed to separate clean water and turbid water, so that different water quality classifications are reasonably utilized, the industrial water standard is met, and the utilization rate is 100%; the separated sludge is settled and is transported and recovered in real time by a submerged electric pump, so that zero emission of the sludge is realized.
In order to achieve the above purpose, the technical scheme of the invention is as follows, and the clear water turbidity water separation process comprises the following steps:
step 1: the pulp is pretreated and then is processed by the method,
step 2: high-pressure press filtration is carried out,
step 3: the filter cloth is selected and the filter cloth is arranged,
step 4: the turbidity of the filtrate at different feed pressures,
step 5: turbidity detection at different pulp inlet times,
step 6: the gradient of the water receiving tank is optimized,
step 7: clear water and turbid water are separated,
step 8: the clear water and turbid water are utilized,
step 9: and (5) treating sediment in a clear water turbidity water tank.
As an improvement of the present invention, step 1: the ore pulp pretreatment is as follows: tailings with low weight concentration and extremely fine granularity are concentrated, so that ore pulp with higher weight concentration is obtained and is conveyed to an input filter press, and the filter press yield and efficiency can be improved. And (3) measuring the granularity of the tailings by-400 meshes of 85 percent and-200 meshes of 96 percent, wherein the maximum granularity is 0.3mm, the weight concentration is 15 percent, 35 g/t-50 g/t of dry ore with the dosage of the polyacrylamide polymer flocculant with the molecular weight of 750 ten thousand is added, and the pulp and the medicament are fully and uniformly mixed and then enter a high-pressure thickener for concentration, so that the concentration of the concentrated underflow weight reaches 55-60 percent, and the overflow is clarified water for production and recycling.
As an improvement of the present invention, step 2: high-pressure filter pressing is carried out, and the concrete steps are as follows: 600m 2 The filter plates of the filter press are vertically arranged, water permeable filter cloth is arranged between adjacent filter plates, the squeezing plates and the non-squeezing plates are arranged at intervals, high-pressure water enters the inner cavity of the squeezing plates through rubber pipes to expand the filter plates, water in filter cakes is squeezed, the main process links include compacting of the compacting plates, pulp feeding, high-pressure water squeezing, compressed air blowing, automatic discharging and filter cake conveying and piling, the filtrate is returned to a thickener for concentration, and filter cakes with different water contents are obtained by optimizing the squeezing time and the blowing time, so that the subsequent utilization is met. When the pressure requirement of ore feeding pulp reaches 0.75-0.80 MPa and the ore feeding pump is used for feeding pulp, under the action of pressure, the superfine tailings form filter cakes on the surfaces of filter cloth, most of water permeates the filter cakes and the filter cloth to become clear filtrate to flow out, and when the pulp feeding time reaches 40-45 minutes, the flowing-out filtrate is in a discontinuous drop shapeWhen the pulp feeding is finished, the conveying pump is stopped, the squeezing and blowing are started, and the squeezing water pressure is 1.2MPa; the squeezing time is 6 minutes, the blowing time is 40 seconds, the thickness of the filter cake is 40-50 mm, and the water content of the filter cake is 15.10%.
As an improvement of the present invention, step 3: the filter cloth is selected as follows: the industrial filter press cloth is made of polypropylene multifilament with multiple purposes, the types are numerous, the thickness is 0.5-1.3 mm, the performance is evaluated by the water permeability per unit time area, the water permeability is large, the treatment capacity is large, the filter cake yield is high, but the solid content in the filtrate is large, the filtrate running and mudding time is long, and the water permeability is 600m 2 3 kinds of filter cloth are tested on an industrial machine, and the water permeability is 600l/m respectively 2 /s、900l/m 2 /s、1500l/m 2 Per second, the output is measured to be 14t/h, 21t/h and 25t/h respectively, the turbidity of the filtrate is 300mg/l, 500mg/l and 1000mg/l respectively 5 minutes before, the average turbidity of the filtrate in 41 minutes in the whole pulp feeding period is 100 mg/l, 250mg/l and 400mg/l respectively, and the filtrate turbidity and the production filter pressing efficiency are considered to determine the water permeation rate of 900l/m 2 The filter cloth of/s is used.
As an improvement of the present invention, step 4: the turbidity of the filtrate under different feeding pressures, the speed of the slag slurry pump is regulated by frequency conversion, and the pressure is 0.80MPa. The slag slurry pump is used for variable frequency speed regulation, the filter cloth type and the slurry concentration are fixed under the condition that the highest pressure allowed by a filter pressing filter plate is 0.80MPa, three pressure tests of 0.5, 0.65 and 0.80MPa are respectively carried out, and the data show that the turbidity of the filtrate in the front 5 minutes is 150, 250 and 400mg/l respectively, the slurry inlet time is 70, 55 and 41 minutes respectively, and the selected pressure is 0.80MPa.
As an improvement of the present invention, step 5: turbidity detection at different pulp inlet time, under the condition of pumping and conveying of a slurry pump, conveying ore pulp into a central hole of a filter plate of a filter press, penetrating into filter cloth, allowing water to flow into a water receiving tank through holes in the filter plate through the filter cloth, installing a vertical pipeline at the bottom of the water receiving tank, continuously flowing out all water together at the water receiving tank through the pipeline, and setting turbidity continuous detection at a water collecting position; at 50% of ore pulp concentration, 0.80MPa of pulp feeding pressure and 900l/m of water permeating capacity by using filter cloth 2 At/s, detecting the pulp inlet time and the turbidity of the filtrate; 17 measurements from 0s until 720s are performed, the detection conditions are shown in Table 1, turbidity of 10s for pulp feeding is 3500mg/l, along withThe time is prolonged, the turbidity of the pulp fed for 240s is 300mg/l, and the industrial water requirement is met.
TABLE 1 time to pulp and filtrate turbidity detection
| Sequence number | Time of pulp feeding s | Turbidity mg/l of filtrate |
| 1 | 0 | 0 |
| 2 | 10 | 3500 |
| 3 | 30 | 2500 |
| 4 | 60 | 1000 |
| 5 | 90 | 900 |
| 6 | 120 | 800 |
| 7 | 180 | 400 |
| 8 | 240 | 300 |
| 9 | 300 | 200 |
| 10 | 360 | 150 |
| 11 | 420 | 100 |
| 12 | 480 | 100 |
| 13 | 540 | 90 |
| 14 | 600 | 90 |
| 15 | 660 | 85 |
| 16 | 660 | 85 |
| 17 | 720 | 80 |
As an improvement of the present invention, step 6: the gradient of the water receiving tank is optimized, and the concrete steps are as follows: the water receiving tank is made of smooth stainless steel plates, the length is 9900mm, the width is 300mm, the height is 350mm, and water flows along the length direction. The bottom gradient is selected properly, if the water is clear water, the gradient level can be met, if the water contains the mineral mud, the mineral mud is deposited at the bottom due to the high specific gravity of the mineral mud, the mineral mud does not flow when the gradient is small, the larger the accumulation is, the space is occupied when the gradient is large, and the aim is that the mineral mud does not accumulate at the bottom of the tank and the minimum proper gradient is adopted; the sediment thickness of the bottom sludge corresponding to 6 groups of slopes including 0, 1%, 2%, 3.5%, 4.5% and 6% is tested respectively, the thicker the thickness is, the higher the sediment degree is, the smaller the slope is, and the result shows that when the slope is 0, the sediment thickness of the bottom sludge of the water receiving tank is 5mm; when the gradient is 1%, the sediment thickness at the bottom of the water receiving tank is 3.5mm; when the gradient is 2%, the sediment thickness at the bottom of the water receiving tank is 2.8mm; when the gradient is 3.5%, the sediment thickness of the bottom sludge of the water receiving tank is 1.5mm; when the gradient is 4.5%, the sediment thickness of the bottom sludge of the water receiving tank is 0mm; when the gradient is 6%, the sediment thickness at the bottom of the water receiving tank is 0mm; so the bottom gradient of the water receiving tank is 4.5 percent, and the lowest position of the water receiving tank is lower than 445.5mm of the highest position of the water receiving tank.
As an improvement of the present invention, step 7: clear water and turbid water are separated, specifically, each water receiving tank flows out through a collecting pipe, the collecting pipe is divided into two pipelines, two electric gate valves are arranged, namely a turbid water gate valve and a clear water gate valve, are connected with a display control screen, and can be opened and closed; the turbidity meter detection data are read out through a background display control screen, when the turbidity value is higher than 300mg/l, the clear water gate valve is automatically closed, and meanwhile, the turbid water gate valve is automatically opened, so that turbid water flows to a turbid water tank; when the turbidity value is lower than 300mg/l, the clear water gate valve is automatically opened, meanwhile, the clear water gate valve is automatically closed, and clear water flows to the clear water tank.
As an improvement of the present invention, step 8: clear water and turbid water are respectively utilized, and the method comprises the following steps: the depth of the clear water and turbid water tanks is 5m, the diameter is 30m, the bottom keeps the gradient of 10 percent, the bottom is inclined towards the center, so that sediment can flow to the center after gravity precipitation, clear upper clear water flows out from the upper part, wherein clear water in the clear water tanks is used for cooling water in oil stations of the ball mill, cooling water in vacuum pumps, water sealing water in slurry pumps and the like; the clear water in the turbid water tank is used for industrial production circulating water for flushing the terrace, the ore pulp pump tank is supplemented with water, ore concentrate unloading flushing water of the magnetic separator, flushing water in a slag separation sieve and the like.
As an improvement of the present invention, step 9: the sediment treatment of the clear water turbid water tank is concretely as follows, a submerged electric pump is arranged in the center of the bottom of the clear water turbid water tank and used for conveying the sediment and sundries deposited at the bottom, the sediment and sundries are cleaned regularly without stopping the machine, the sediment and sundries are conveyed to a feeding pump tank of a filter press, and the sediment is continuously filtered by the feeding filter press, so that the whole treatment of the sediment is realized, and the sediment is not discharged.
Compared with the prior art, the invention has the following advantages: according to the invention, the water quality is continuously detected on line through turbidity and is immediately transmitted to the background control unit, an instruction is sent in real time according to the detection value, the electric gate valve is automatically opened and closed, clear water and turbid water are separated, different water quality classifications are reasonably utilized, and the industrial water standard is met, and the utilization rate is 100%; the separated sludge is settled and is transported and recovered in real time by a submerged electric pump, so that zero emission of the sludge is realized; 3 600m 2 Automatic filter press for 1 year presses tailing filter cake 46.8 ten thousand t, discharges filtrate 33.95 ten thousand m 3 Can directly recycle 23.76 ten thousand meters of clean water 3 The method comprises the steps of carrying out a first treatment on the surface of the The running cost is reduced, and the water treatment cost is only 0.8 yuan/m 3 The investment yield is 32%, which is 22 percentage points higher than the industry average value of 10%.
Drawings
FIG. 1 is a schematic diagram of the separation process of the present invention.
In the figure: 1. the device comprises superfine tailing pulp, a conveying slurry pump, a filter press, a filtrate water receiving tank, a turbid water electric valve, a clear water electric valve, a turbidity meter, a display controller, a connecting cable, a sedimentation tank, a submersible electric pump, a sedimentation tank and a submersible electric pump.
The specific embodiment is as follows:
in order to enhance the understanding of the present invention, the present embodiment will be described in detail with reference to the accompanying drawings.
Example 1: referring to fig. 1, example 1: a clear water and turbid water separation process and method comprise the following steps:
step 1, pulp pretreatment;
measuring the granularity of tailings by-400 meshes of 85 percent, 200 meshes of 96 percent, the maximum granularity of 0.3mm and the weight concentration of 15 percent, adding 50g/t dry ore with the dosage of a macromolecular flocculant with the molecular weight of 750 ten thousand into the slurry, fully and uniformly mixing the slurry and the medicament, and entering the diameterConcentrating by a 30m high-pressure concentrator to obtain concentrated underflow with the weight concentration reaching 55%, and overflowing to obtain clarified water.
Step 2, high-pressure filter pressing;
by 600m 2 The filter press and the filter plates are vertically arranged, when the pulp pressure of the ore feeding pump reaches 0.80MPa, a filter cake is formed on the surface of the filter cloth, most of water permeates through the filter cake and the filter cloth to become clear filtrate to flow out, when the pulp inlet time reaches 41 minutes, the flowing-out filtrate is in a discontinuous drop shape, the pulp inlet is finished, the conveying pump is stopped, the squeezing and blowing are started, and the squeezing water pressure is 1.2MPa; the pressing time is 6 minutes, the blowing time is 40 seconds, and the thickness of the filter cake is 47mm, and the moisture of the filter cake is 15.10%.
Step 3, selecting the filter cloth;
the industrial filter press cloth is made of polypropylene multifilament with multiple purposes, the types are numerous, the thickness is 0.5-1.3 mm, the performance is evaluated by the water permeability per unit time area, the water permeability is large, the treatment capacity is large, the filter cake yield is high, but the solid content in the filtrate is large, the filtrate running and mudding time is long, and the water permeability is 600m 2 The industrial machine is selected to use filter cloth with water permeability of 900l/m2/s, the turbidity of the filtrate is 500mg/l for 5 minutes, and the average turbidity of the filtrate in 41 minutes in the whole pulp feeding period is 250mg/l respectively.
Step 4, feeding pressure and filtrate turbidity;
the slag slurry pump is used for variable frequency speed regulation, the type of filter cloth and the concentration of ore pulp are fixed under the condition that the highest pressure of a filter pressing filter plate is allowed to be 0.80MPa, when the ore feeding pressure is 0.80MPa, the turbidity of the filtrate for the first 5 minutes is 250mg/l, and the slurry feeding time is 41 minutes.
Step 5, detecting turbidity at different pulp inlet times;
under the pressure transmission of a slurry pump, the slurry is transmitted into a central hole of a filter plate of the filter press and permeates into the filter cloth, water flows into a water receiving tank through pores in the filter plate through the filter cloth, a vertical pipeline is arranged at the bottom of the water receiving tank, all water is gathered and continuously flows out through the pipeline, and turbidity is continuously detected at the water gathering position; at the ore feeding pulp concentration of 55%, the pulp feeding pressure of 0.80MPa, and the water permeability of 900l/m by using filter cloth 2 At/s, detecting the pulp inlet time and the turbidity of the filtrate; the measurement is carried out 17 times from 0s to 720s, the detection conditions are shown in table 1, the turbidity of the pulp fed for 10s is 3500mg/l, the turbidity of the pulp fed for 240s is 300mg/l gradually decreases along with the time extension, and the industrial water requirement is met.
TABLE 1 time to pulp and filtrate turbidity detection
Step 6, gradient of the water receiving tank;
the stainless steel plate with a smooth water receiving groove is 9900mm in length, 300mm in width and 350mm in height, water flows along the length direction, the gradient of the bottom is proper, if the water is clear water, the gradient level can be met, if the water contains mineral mud, the mineral mud is deposited at the bottom due to high specific gravity, the mineral mud does not flow when the gradient is small, the more the mineral mud is accumulated, the space is occupied when the gradient is large, and the aim is that the mineral mud is not accumulated at the bottom of the groove, and the minimum proper gradient is adopted; when the gradient is 4.5%, the sediment thickness of the bottom sludge of the water receiving tank is 0mm; the gradient of the bottom of the water receiving tank is 4.5 percent, and the lowest position of the water receiving tank is lower than 445.5mm of the highest position of the water receiving tank.
Step 7, separating clear water and turbid water;
each water receiving tank flows out through a collecting pipe, the collecting pipe is divided into two pipelines, two electric gate valves are arranged, namely a turbid water gate valve and a clear water gate valve, are respectively connected with a display control screen, and can be opened and closed; the turbidity meter detection data are read out through a background display control screen, when the turbidity value is higher than 300mg/l, the clear water gate valve is automatically closed, and meanwhile, the turbid water gate valve is automatically opened, so that turbid water flows to a turbid water tank; when the turbidity value is lower than 300mg/l, the clear water gate valve is automatically opened, meanwhile, the clear water gate valve is automatically closed, and clear water flows to the clear water tank.
Step 8, respectively utilizing clear water and turbid water;
clear water and turbid water pool depth 5m, diameterThe bottom keeps the slope 10%, and inclines to the center, so that sediment can flow to the center after gravity precipitation, clear upper clear water flows out from the upper part, wherein clear water in a clear water tank is used for cooling water of a ball mill oil station, cooling water of a vacuum pump, water sealing water of a slurry pump and the like; the clear water in the turbid water tank is used for industrial production circulating water for flushing the terrace, the ore pulp pump tank is supplemented with water, ore concentrate unloading flushing water of the magnetic separator, flushing water in a slag separation sieve and the like.
Step 9, treating sediment in a clear water turbid water tank;
the center of the bottom of the clear water turbid water tank is provided with a submerged electric pump, the model is 200WQ250-13-15, and the flow is 250m 3 And/h, the device is used for conveying the ore slime and sundries deposited at the bottom, cleaning the ore slime and sundries regularly without stopping the machine, conveying the ore slime and sundries to an ore feeding pump pool of a filter press, continuously filtering the ore slime by the filter press, and realizing the complete treatment of the ore slime without discharging.
Step 10, a complete invention process;
measuring the granularity of the superfine tailings: 85 percent of 400 meshes, 96 percent of 200 meshes, 0.3mm of maximum granularity and 15 percent of weight concentration, obtaining 55 percent of underflow concentration through the pretreatment of adding flocculant and concentrating, and entering high-pressure filter pressing, wherein the water permeability is 900l/m 2 The filter cloth of/s, the ore feeding pressure is 0.80MPa to obtain filter cakes and filtrate, the turbidity of the filtrate is 300mg/l after 240s of pulp feeding, and the requirements of industrial water are met;
the bottom gradient of the water receiving tank is 4.5%, the sediment thickness is 0, the turbid water gate valve and the clear water gate valve are automatically controlled, separation is realized, and the diameter is enteredSedimentation treatment in a sedimentation tank, wherein clear water in a clear water tank is used for cooling water in an oil station of a ball mill, cooling water in a vacuum pump, water sealing water in a slurry pump and the like; the clear water in the turbid water tank is used for industrial production circulating water for flushing the terrace, the ore pulp pump tank is supplemented with water, ore concentrate unloading flushing water of the magnetic separator, flushing water in a slag separation sieve and the like; the sludge at the bottom of the sedimentation tank can be continuously conveyed, returned to the process for reprocessing, and the utilization rate of clear water and turbid water reaches 100%.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present invention as defined in the claims.
Claims (1)
1. A clear water turbidity water separation process, which is characterized by comprising the following steps:
step 1: the pulp is pretreated and then is processed by the method,
step 2: high-pressure press filtration is carried out,
step 3: the filter cloth is selected and the filter cloth is arranged,
step 4: the turbidity of the filtrate at different feed pressures,
step 5: turbidity detection at different pulp inlet times,
step 6: the gradient of the water receiving tank is optimized,
step 7: clear water and turbid water are separated,
step 8: the clear water and turbid water are utilized,
step 9: treating sediment in a clear water turbidity water tank;
wherein, step 1: the ore pulp pretreatment is as follows:
measuring the granularity of tailings by-400 meshes of 85 percent and-200 meshes of 96 percent, wherein the maximum granularity is 0.3mm, the weight concentration is 15 percent, adding 35-50 g/t dry ore of macromolecular flocculant with the molecular weight of 750 ten thousand, fully and uniformly mixing ore pulp and medicament, and then concentrating in a high-pressure concentrator to obtain concentrated underflow with the weight concentration of 55-60 percent, wherein overflow is clarified water for production and recycling;
step 2: high-pressure filter pressing is carried out, and the concrete steps are as follows: 600m 2 The filter plates of the filter press are vertically arranged, water-permeable filter cloth is arranged between adjacent filter plates, the squeezing plates and the non-squeezing plates are arranged at intervals, high-pressure water enters into the cavity in the squeezing plates through rubber pipes, the filter plates are expanded, and water in filter cakes is squeezed; when the pressure requirement of ore pulp fed to the ore pump reaches 0.75-0.80 MPa, under the pressure effect, the ultrafine tailings form a filter cake on the surface of the filter cloth, most of water permeates the filter cake and the filter cloth to become clear filtrate to flow out, when the pulp feeding time reaches 40-45 minutes, when the flowing-out filtrate is in a discontinuous drop shape, the pulp feeding is finished, the conveying pump is stopped, the squeezing and blowing are started, and the squeezing water pressure is 1.2MPa; the squeezing time is 6 minutes, the blowing time is 40 seconds, the thickness of the filter cake is 40-50 mm, the water content of the filter cake is 15.10 percent,
step 3: the filter cloth is selected, and the water permeability is 900l/m 2 The filter cloth of/s is used,
step 4: the turbidity of the filtrate under different feeding pressures, the speed of the slag slurry pump is regulated by frequency conversion, the pressure is selected to be 0.80MPa,
step 5: turbidity detection at different pulp inlet time, under the condition of pumping and conveying of a slurry pump, conveying ore pulp into a central hole of a filter plate of a filter press, penetrating into filter cloth, allowing water to flow into a water receiving tank through holes in the filter plate through the filter cloth, installing a vertical pipeline at the bottom of the water receiving tank, continuously flowing out all water together at the water receiving tank through the pipeline, and setting turbidity continuous detection at a water collecting position; at 50% of ore pulp concentration, 0.80MPa of pulp feeding pressure and 900l/m of water permeating capacity by using filter cloth 2 At/s, the time of pulp inlet and the turbidity of filtrate are detected,
step 6: the gradient of the water receiving tank is optimized, and the concrete steps are as follows: the stainless steel plate with the smooth water receiving groove is 9900mm in length, 300mm in width and 350mm in height, water flows along the length direction, the gradient of the bottom of the water receiving groove is 4.5%, the lowest position of the water receiving groove is lower than 445.5mm at the highest position, and the method comprises the following steps: clear water and turbid water are separated, specifically, each water receiving tank flows out through a collecting pipe, the collecting pipe is divided into two pipelines, two electric gate valves are arranged, namely a turbid water gate valve and a clear water gate valve, are connected with a display control screen, and can be opened and closed; the turbidity meter detection data are read out through a background display control screen, when the turbidity value is higher than 300mg/l, the clear water gate valve is automatically closed, and meanwhile, the turbid water gate valve is automatically opened, so that turbid water flows to a turbid water tank; when the turbidity value is lower than 300mg/l, the clear water gate valve is automatically opened, meanwhile, the clear water gate valve is automatically closed, clear water flows to the clear water tank, and the step 8: clear water turbid water is utilized, and the method concretely comprises the following steps: the depth of the clear water and turbid water tanks is 5m, the diameter is 30m, the bottom keeps the gradient of 10 percent, the bottom is inclined towards the center, so that sediment can flow to the center after gravity precipitation, clear upper clear water flows out from the upper part, wherein clear water in the clear water tanks is used for cooling water in oil stations of the ball mill, cooling water in vacuum pumps and water sealing water in slurry pumps; the clear water in the turbid water tank is used for industrial production circulating water and is used for flushing the terrace, the ore pulp pump tank is supplemented with water, ore concentrate of the magnetic separator is unloaded with flushing water, flushing water in the slag separation sieve is used for flushing water, and step 9: the sediment treatment of the clear water turbid water tank is concretely as follows, a submerged electric pump is arranged in the center of the bottom of the clear water turbid water tank and used for conveying the sediment and sundries deposited at the bottom, the sediment and sundries are cleaned regularly without stopping the machine, the sediment and sundries are conveyed to a feeding pump tank of a filter press, and the sediment is continuously filtered by the feeding filter press, so that the whole treatment of the sediment is realized, and the sediment is not discharged.
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