CN106362480A - Efficient filtering method of concentrate pulp - Google Patents
Efficient filtering method of concentrate pulp Download PDFInfo
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- CN106362480A CN106362480A CN201611059495.0A CN201611059495A CN106362480A CN 106362480 A CN106362480 A CN 106362480A CN 201611059495 A CN201611059495 A CN 201611059495A CN 106362480 A CN106362480 A CN 106362480A
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- concentrate
- filter
- filter aid
- pulp
- underflow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
Abstract
The invention relates to an efficient filtering method of concentrate pulp. In a concentrate pulp filtering system with no concentrate thick pulp mixing tank, a dosing point of a filter aid is set behind a concentrate concentrated large well; in a concentrate pulp filtering system with a concentrate thick pulp mixing tank, a dosing point of the filter aid is set behind the concentrate thick pulp mixing tank; a filter aid dosing device is composed of a filter aid storage tank, a filter aid feeding pump and a filter aid header tank which are sequentially connected and is controlled through an automatic dosing control system; the automatic dosing control system is composed of a control device, a pulp flowmeter, a filter aid flowmeter, an electrically operated valve and an electromagnetic valve, wherein the pulp flowmeter, the filter aid flowmeter, the electrically operated valve and the electromagnetic valve are connected with the control device. According to different concentrate pulp filtering systems, the filter aid dosing points are reasonably set, and the dosing amount is controlled through the automatic dosing control system; accordingly, the concentrate pulp filtering efficiency is greatly improved, and the filter cake water content is lowered.
Description
Technical field
The present invention relates to slurry filtration and sludge press filtration technical field, more particularly, to one kind are applied to iron mine, aluminium ore, colliery
Or the concentrate pulp high efficiency filter method of other slurry filtration and sludge press filtration process.
Background technology
In iron ore concentrate ore dressing process, the filtration of concentrate pulp is the important process factor in ore dressing process, and it is to Haematite
The production cost of ore deposit, the quality of iron ore concentrate all can play critically important effect.
In existing ore-dressing technique, after ore grinding, powder particle size degree of refinement and fine granularity breeze proportion are continuously increased,
In addition the reverse flotation that breeze passes through roughly select fall miscellaneous after, resulting in concentrate pulp becomes thinner, more tacky, and essence mine dehydration task difficulty adds
Greatly, filter efficiency reduces.If filter cake moisture is more than 12%, concentrate transportation system easily blocks, to production system just
Often run and bring adverse effect.In existing concentrate pulp dewatering process, raising filtration effect can only be reached by adding filter aid
Rate, reduces filter cake moisture, reduces the purpose of investment in technological transformation, and meets the moisture requirement to concentrate for the postorder operation.
Filter aid is that it primarily serves the purpose of: 1) plays flocculation for reducing filter cake moisture, improving the medicament of filter efficiency
Effect, makes short grained mineral become bulky grain, and increase water penetration prevents tiny mineral blocking filter cloth simultaneously.2) reduce concentrate ore deposit
The viscosity of slurry, increases the mobility of concentrate pulp, advantageously in filtration.
In technology disclosed in existing document, the set-up mode of filter aid chemical feeding points has following 3 kinds: 1) is arranged on concentrate pulp
Chute；2) it is arranged on concentrate underflow agitator mine-separating box；3) it is arranged on above concentrate underflow agitator.This 3 kinds of chemical feeding points settings
Mode all has following defect: before being arranged at concentrate pulp agitator due to chemical feeding points, can cause to have flocculated into big
The ore pulp of grain is dispersed as little particle after entering concentrate underflow agitator again, loses original effect, thus largely effecting on
Filter efficiency.
Content of the invention
The invention provides a kind of concentrate pulp high efficiency filter method, according to different concentrate pulp filtration systems, rationally
Setting filter aid chemical feeding points, and chemical feeding quantity is controlled by Automatic Dosage Control of Additives system；Thus greatly improving concentrate pulp to filter effect
Rate, reduces filter cake moisture content.
In order to achieve the above object, the present invention employs the following technical solutions realization:
A kind of concentrate pulp high efficiency filter method, specifically includes:
1) concentrate pulp filtration system concentrates big well, concentrate underflow pump, essence by the concentrate pulp chute being sequentially connected, concentrate
Ore deposit underflow filter mine-separating box and vacuum filter composition；The overfall of vacuum filter and concentrate underflow filter mine-separating box leads to
Cross overflow pipe and connect concentrate pulp chute；Filter aid chemicals dosing plant used is by the filter aid holding vessel being sequentially connected, filter aid
Feeding pump and filter aid head tank composition；Filter aid head tank connects each chemical feeding points by drug feeding pipeline；Chemical feeding points include: a. essence
On the ore pulp delivery duct that ore deposit concentrates between big well and concentrate underflow pump, b. concentrate underflow pump and concentrate underflow filter mine-separating box
Between ore pulp delivery duct on, c. concentrate underflow filter mine-separating box, d. concentrate underflow filter mine-separating box and vacuum filter
Between ore pulp delivery duct on；A～c chemical feeding points can be arranged alone or in combination, is arranged as required to 1～4；Filter aid dosing
Device is controlled by Automatic Dosage Control of Additives system；
2) concentrate pulp filtration system by the concentrate pulp chute being sequentially connected, concentrate concentrate big well, concentrate underflow pump a,
Concentrate underflow agitator mine-separating box, concentrate underflow agitator, concentrate underflow pump b, concentrate underflow filter mine-separating box and vacuum mistake
Filter forms；The overfall of vacuum filter and concentrate underflow filter mine-separating box connects concentrate pulp stream by overflow pipe
Groove；Filter aid chemicals dosing plant used is made up of the filter aid holding vessel being sequentially connected, filter aid feeding pump and filter aid head tank；
Filter aid head tank connects each chemical feeding points by drug feeding pipeline；Chemical feeding points include a. concentrate underflow agitator and concentrate underflow pump b
Between ore pulp delivery duct on, on the ore pulp delivery duct between b. concentrate underflow pump b and concentrate underflow filter mine-separating box,
C. concentrate underflow filter mine-separating box, d. concentrate underflow filter on the ore pulp delivery duct between mine-separating box and vacuum filter；a
～c chemical feeding points can be arranged alone or in combination, is arranged as required to 1～4；Filter aid chemicals dosing plant passes through Automatic Dosage Control of Additives system
System controls；
3) concentrate pulp filtration system concentrates big well, concentrate underflow pump by by the concentrate pulp chute being sequentially connected, concentrate
A, concentrate underflow agitator mine-separating box, concentrate underflow agitator, concentrate underflow pump b and filter press composition；Filter press
Overfall by overflow pipe connect concentrate pulp chute；Filter aid chemicals dosing plant used is by the filter aid storage being sequentially connected
Tank, filter aid feeding pump and filter aid head tank composition；Filter aid head tank connects each chemical feeding points by drug feeding pipeline；Chemical feeding points
Including on the ore pulp delivery duct between a. concentrate underflow agitator and concentrate underflow pump b, b. concentrate underflow pump b and filter press
On ore pulp delivery duct between machine；A, b chemical feeding points can be arranged alone or in combination, is arranged as required to 1～2；Filter aid adds
Medicine device is controlled by Automatic Dosage Control of Additives system.
Flow of slurry scale that described Automatic Dosage Control of Additives system is connected respectively by control device and with control device, filter aid
Flow meter, electrodynamic valve and electromagnetic valve composition；Set gradually in drug feeding pipeline between filter aid head tank and chemical feeding points electromagnetic valve,
Electrodynamic valve and filter aid flow meter, and electromagnetic valve and electrodynamic valve setting be located proximate to filter aid head tank；Vacuum filter or
Flow of slurry scale is set on the ore pulp delivery duct before filter press.
Filter aid Automatic Dosage Control of Additives process is as follows:
1) before filter aid dosing, flow is set according to filter aid, corresponding aperture opened by electrodynamic valve；Electromagnetic valve is in cut out
State；
2) during filter aid dosing, flow of slurry scale detected ore pulp flow through i.e. reading be more than zero when, pass the signal along to
In control device, control device controls electromagnetic valve to open；Filter aid in filter aid head tank is flow automatically by drug feeding pipeline and flows to
Each chemical feeding points；The flow of flow of slurry scale real-time detection concentrate pulp, and institute's flow measurement value is sent in control device；According to
Preset reduction formula, control device calculates corresponding filter aid flow theory add value automatically, and this value is converted to control
Signal processed is sent in electrodynamic valve, and electrodynamic valve adjusts the real-time traffic of filter aid accordingly；Filter aid flow meter again will be measured
Filter aid real-time flow data feed back in control device, so circulate, realize the real-time control of drainage agent flux；
3), after filter aid dosing terminates, close electrodynamic valve；The reading treating flow of slurry scale is zero, then when waiting more than 10 seconds
Between, it is then shut off electromagnetic valve；Reopen electrodynamic valve again, be ready for the process of filter aid dosing next time.
Float switch is set, float switch is linked with filter aid feeding pump, for controlling drainage in described filter aid head tank
Liquid level in agent head tank.
Described chemical feeding points can set multiple points of chemical feeding points, and each chemical feeding points or a point filter aid added by chemical feeding points can be identical, also may be used
With difference.
Described control device is plc or computer.
Compared with prior art, the invention has the beneficial effects as follows:
1) according to the chemical feeding points position that different filtration system settings is different, in the concentrate ore deposit not setting concentrate underflow agitator
In slurry filtration system, after the chemical feeding points of filter aid are arranged on the concentrate big well of concentration；In the concentrate being provided with concentrate underflow agitator
In slurry filtration system, after the chemical feeding points of filter aid are arranged on concentrate underflow agitator, prevent the oarse-grained ore deposit after flocculating
Slurry is dispersed as little particle after entering concentrate underflow agitator again, thus improving filter efficiency, reduces filter cake moisture content；
2) one or more dosings can be set as needed, continuous dosing amount is controlled by Automatic Dosage Control of Additives system, protect
Card filter aid and the mixing match of concentrate pulp, and both mix homogeneously；
3) in Automatic Dosage Control of Additives system, by the way of electrodynamic valve and electromagnetic valve combine, it is to avoid electrodynamic valve is because during reaction
Between slow there is time delay dosing phenomenon it is ensured that optimal dosing effect.
Brief description
Fig. 1 is the principle schematic of the embodiment of the present invention one.
Fig. 2 is the principle schematic of the embodiment of the present invention two.
Fig. 3 is the principle schematic of the embodiment of the present invention three.
In figure: the 1. big well 3. concentrate underflow pump 4. concentrate underflow filter of concentrate pulp chute 2. concentrate concentration divides ore deposit
Case 5. vacuum filter 6. filter aid discharging pump 7. filter aid holding vessel 8. drainage machine feeding pump 9. filter aid head tank
10. float switch 11. filter aid head tank overflow pipe 12. control device, 13. electromagnetic valve, 14. electrodynamic valve 15. filter aid stream
Scale 16. flow of slurry scale 17. concentrate underflow pump a 18. concentrate underflow agitator mine-separating box 19. concentrate underflow agitator
20. concentrate underflow pump b 21. filter press 23. points of ore deposit electrodynamic valves of 22. flood pump
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further:
A kind of concentrate pulp high efficiency filter method of the present invention, specifically includes:
1) as shown in figure 1, concentrate pulp filtration system by the concentrate pulp chute 1 being sequentially connected, concentrate concentrate big well 2,
Concentrate underflow pump 3, concentrate underflow filter mine-separating box 4 and vacuum filter 5 form；Vacuum filter 5 and concentrate underflow filter
The overfall of machine mine-separating box 4 connects concentrate pulp chute 1 by overflow pipe；Filter aid chemicals dosing plant used is by being sequentially connected
Filter aid holding vessel 7, filter aid feeding pump 8 and filter aid head tank 9 form；Filter aid head tank 9 is connected by drug feeding pipeline
Each chemical feeding points；Chemical feeding points include: on the ore pulp delivery duct that a. concentrate concentrates between big well 2 and concentrate underflow pump 3, b. concentrate dense
On ore pulp delivery duct between stock pump 4 and concentrate underflow filter mine-separating box 4, c. concentrate underflow filter mine-separating box 4, d. essence
Ore deposit underflow filters on the ore pulp delivery duct between mine-separating box 4 and vacuum filter 5；A～c chemical feeding points can set alone or in combination
Put, be arranged as required to 1～4；Filter aid chemicals dosing plant is controlled by Automatic Dosage Control of Additives system；
2) as shown in Fig. 2 concentrate pulp filtration system by the concentrate pulp chute 1 being sequentially connected, concentrate concentrate big well 2,
Concentrate underflow pump a17, concentrate underflow agitator mine-separating box 18, concentrate underflow agitator 19, concentrate underflow pump b20, concentrate underflow
Filter mine-separating box 4 and vacuum filter 5 form；The overfall of vacuum filter 5 and concentrate underflow filter mine-separating box 4 passes through
Overflow pipe connects concentrate pulp chute 1；Filter aid chemicals dosing plant used is by the filter aid holding vessel 7 being sequentially connected, filter aid
Feeding pump 8 and filter aid head tank 9 form；Filter aid head tank 9 connects each chemical feeding points by drug feeding pipeline；Chemical feeding points include a.
On ore pulp delivery duct between concentrate underflow agitator 19 and concentrate underflow pump b20, b. concentrate underflow pump b20 and concentrate underflow
On ore pulp delivery duct between filter mine-separating box 4, c. concentrate underflow filter mine-separating box 4, d. concentrate underflow filter a point ore deposit
On ore pulp delivery duct between case 4 and vacuum filter 5；A～c chemical feeding points can be arranged alone or in combination, is arranged as required to 1
～4；Filter aid chemicals dosing plant is controlled by Automatic Dosage Control of Additives system；
3) as shown in figure 3, concentrate pulp filtration system concentrates big well by by the concentrate pulp chute 1 being sequentially connected, concentrate
2nd, concentrate underflow pump a17, concentrate underflow agitator mine-separating box 18, concentrate underflow agitator 19, concentrate underflow pump b20 and sheet frame pressure
Filter 21 forms；The overfall of filter press 21 connects concentrate pulp chute 1 by overflow pipe；Filter aid dosing dress used
Put and be made up of the filter aid holding vessel 7 being sequentially connected, filter aid feeding pump 8 and filter aid head tank 9；Filter aid head tank 9 leads to
Cross drug feeding pipeline and connect each chemical feeding points；Chemical feeding points include the ore pulp between a. concentrate underflow agitator 19 and concentrate underflow pump b20
On ore pulp delivery duct on conveyance conduit, between b. concentrate underflow pump b20 and filter press 21；A, b chemical feeding points can be independent
Or combination setting, it is arranged as required to 1～2；Filter aid chemicals dosing plant is controlled by Automatic Dosage Control of Additives system.
As shown in Figure 1-Figure 3, described Automatic Dosage Control of Additives system is connected with control device 12 by control device 12 and respectively
Flow of slurry scale 16, filter aid flow meter 15, electrodynamic valve 14 and electromagnetic valve 13 form；Filter aid head tank 9 and chemical feeding points it
Between drug feeding pipeline on set gradually electromagnetic valve 13, electrodynamic valve 14 and filter aid flow meter 15, and electromagnetic valve 13 and electrodynamic valve 14
Arrange is located proximate to filter aid head tank 9；Ore deposit is set on ore pulp delivery duct before vacuum filter 5 or filter press 21
Slurry flow meter 16.
Filter aid Automatic Dosage Control of Additives process is as follows:
1) before filter aid dosing, flow is set according to filter aid, corresponding aperture opened by electrodynamic valve 14；Electromagnetic valve 13 is in
Closed mode；
2) during filter aid dosing, flow of slurry scale 16 detected ore pulp flow through i.e. reading be more than zero when, by signal transmission
To in control device 12, control device 12 controls electromagnetic valve 13 to open；Filter aid in filter aid head tank 9 passes through drug feeding pipeline
Flow to each chemical feeding points；The flow of flow of slurry scale 16 real-time detection concentrate pulp, and institute's flow measurement value is sent to control
In device 12；According to preset reduction formula, control device 12 calculates corresponding filter aid flow theory add value automatically, and
This value is converted to control signal be sent in electrodynamic valve 14, electrodynamic valve 14 adjusts the real-time traffic of filter aid accordingly；Filter aid
Measured filter aid real-time flow data is fed back in control device 12 by flow meter 16 again, so circulates, realizes filter aid
The real-time control of flow；
3), after filter aid dosing terminates, close electrodynamic valve 14；The reading treating flow of slurry scale 16 is zero, then wait 10 seconds with
The upper time, it was then shut off electromagnetic valve 13；Reopen electrodynamic valve 14 again, be ready for the process of filter aid dosing next time.
Float switch 10 is set, float switch 10 is linked with filter aid feeding pump 8, for controlling in described filter aid head tank 9
Liquid level in filter aid head tank 9 processed.
Described chemical feeding points can set multiple points of chemical feeding points, and each chemical feeding points or a point filter aid added by chemical feeding points can be identical, also may be used
With difference.
Described control device 12 is plc or computer.
The Chinese patent of Application No. 87202472 discloses a kind of " floatation system disperses multiple spot automatic medicine adding apparatus ", uses
Flotation agent is added when coal preparation plant carries out flotation operation；It is " by the electromagnetic flowmeter being contained on raw ore slurry supplied materials pipeline and ore pulp
Densitometer form, also include one be contained on loading total main road in order to measure medicament tiny flow quantity throttling differential pressure flowmeter,
Microprocessor and some loading branch lines branching out from loading total main road direction floatation system, in Mei Tiao loading branch
Several chemical feeding points of setting on pipeline ".This technical scheme is used for monitoring the electromagnetic flowmeter of mineral slurry flux and being used for monitoring ore deposit
The ore pulp concentration meter of slurry concentration is arranged on raw ore slurry supplied materials pipeline, therefore can only monitor the mineral slurry flux in ore pulp house steward
And concentration；Throttling differential pressure flowmeter for monitoring medicament flow is arranged on loading total main road, therefore can only monitor to add
Medicament flow in medicine house steward；System, after the flow signal obtaining floating raw ore slurry and concentration signal, sets a medicine ore deposit ratio
Example coefficient signal, is multiplied through multiplier, obtains a Setting signal being proportional to additive amount of medicament needed for floating dry mine content, with section
The actual dose addition signal of stream differential pressure flowmeter output is compared, and its deviation signal is through pid actuator and analog digital conversion
Device, obtains the pulse signal of corresponding frequencies, drives monostable switch to control the dosing by the ratio of the required of dosing electromagnetic valve.And specific to
The chemical feeding quantity size of each chemical feeding points can only be by technological requirement pro rate, that is, when setting floatation system chemical feeding quantity as 1, then each adds
The allocation proportion of snack made with traditional Chinese medicines is the coefficient less than 1, and its summation is 1.Limited by technical conditions at that time, this technical scheme structure is multiple
Miscellaneous, and each chemical feeding points can only by technological requirement pro rate chemical feeding quantity although achieving the close-loop automatic adjustment of dosing, but its
Comparatively the levels of precision of dosing can only be.
The present invention is to set electromagnetic valve, electrodynamic valve in the drug feeding pipeline between filter aid head tank and chemical feeding points successively and help
Filtering agent flow meter, sets flow of slurry scale, therefore convection current on the ore pulp delivery duct between vacuum filter or filter press
Enter the mineral slurry flux of each filter plant and drainage agent flux all can accurately monitor, regulate and control in time.Its structure is simple, and reaction is fast
Speed, is adjusted accurately.Simultaneously by way of electrodynamic valve is combined with electromagnetic valve, it is to avoid electrodynamic valve occurs time delay to add because the response time is slow
Medicine phenomenon is it is ensured that optimal dosing effect.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.In following embodiments, method therefor is such as no special
Do not mentionlet alone and bright be conventional method.
[embodiment 1]
As shown in figure 1, in the present embodiment, concentrate pulp filtration system is dense by the concentrate pulp chute 1 being sequentially connected, concentrate
Contract big well 2, concentrate underflow pump 3, concentrate underflow filter mine-separating box 4 and vacuum filter 5 forms；Vacuum filter 5 and concentrate
The overfall of underflow filter mine-separating box 4 connects concentrate pulp chute 1 by overflow pipe, and overflow pipe sets flood pump 22.
Iron ore concentrate concentration be 20% about iron ore concentrate ore pulp by concentrate pulp chute 1 enter concentrate concentrate big well 2, in essence
Ore deposit concentrates in big well 2, goes through overflow after water process, and concentrate concentrates the underflow of big well 2 and obtains the concentrate pulp that concentration is more than 60%,
Concentrate pulp is directly sent to clear ore deposit underflow filter mine-separating box 4 through ore pulp delivery duct in the presence of concentrate underflow pump 3, then divides
Deliver in 3 groups of vacuum filters 5 and filter；The overflowing liquid of vacuum filter 5 and concentrate underflow filter mine-separating box 4 pumps through overflow
Return to concentrate pulp chute 1.
Filter aid chemicals dosing plant used by the present embodiment by the filter aid holding vessel 7 being sequentially connected, filter aid feeding pump 8 and helps
Filtering agent head tank 9 forms；Filter aid holding vessel 9 passes through the tank car loading and unloading material from transport filter aid for the filter aid discharging pump 6.Filter aid
Head tank 9 connects each chemical feeding points by drug feeding pipeline.The overfall of filter aid head tank 9 passes through filter aid head tank overflow pipe 11
Connect filter aid holding vessel 7.
In routine techniquess, in the concentrate pulp filtration system being not provided with concentrate underflow agitator 19, filter aid dosing
Point is generally located on concentrate pulp chute 1, but in the concentrate concentration process and then carrying out, can cause a large amount of streams of filter aid
Lose, not only result in the wasting of resources, cost raises, and causes follow-up filter efficiency to reduce.Chemical feeding points are arranged by the present invention
On ore pulp delivery duct after concentrate concentrates big well 2 or equipment, the loss of filter aid can be avoided.
As shown in figure 1, in the present embodiment, concentrate underflow filter mine-separating box 4 connects 3 groups of vacuum by ore pulp delivery duct
Filter 5, chemical feeding points arrange 1, that is, be arranged on the ore deposit between concentrate underflow filter mine-separating box 4 and each group vacuum filter 5
On slurry conveyance conduit, this ore pulp delivery duct is simultaneously provided with flow of slurry scale 16 and point ore deposit electrodynamic valve 23, point ore deposit electrodynamic valve 23
Control system interlocked control with vacuum filter 5.
[embodiment 2]
As shown in Fig. 2 the concentrate pulp filtration system of the present embodiment is dense by the concentrate pulp chute 1 being sequentially connected, concentrate
Contract big well 2, concentrate underflow pump a17, concentrate underflow agitator mine-separating box 18, concentrate underflow agitator 19, concentrate underflow pump b20,
Concentrate underflow filter mine-separating box 4 and vacuum filter 5 form；The overflowing of vacuum filter 5 and concentrate underflow filter mine-separating box 4
Head piece connects concentrate pulp chute 1 by overflow pipe；In the present embodiment, it is provided with 2 groups of concentrate underflow agitators 19 and 3 groups of vacuum
Filter 5.
Iron ore concentrate concentration be 20% about iron ore concentrate ore pulp by concentrate pulp chute 1 enter concentrate concentrate big well 2, in essence
Ore deposit concentrates in big well 2, goes through overflow after water process, and concentrate concentrates the underflow of big well 2 and obtains the concentrate pulp that concentration is more than 60%.
Concentrate pulp enters concentrate underflow agitator 19 through concentrate underflow agitator mine-separating box 18 in the presence of concentrate underflow pump a17,
Agitated temporary after, be delivered to concentrate underflow filter mine-separating box through ore pulp delivery duct in the presence of concentrate underflow pump b20
4, then be delivered to vacuum filter 5 through ore pulp delivery duct and filter.
In the present embodiment, filter aid chemicals dosing plant by the filter aid holding vessel 7 being sequentially connected, filter aid feeding pump 8 and helps
Filtering agent head tank 9 forms；Filter aid head tank 9 connects each chemical feeding points by drug feeding pipeline.
In routine techniquess, the chemical feeding points being provided with the concentrate pulp filtration system of concentrate underflow agitator 19 are generally arranged at essence
On ore deposit ore pulp chute 1, concentrate underflow agitator 19 or concentrate underflow agitator mine-separating box 18；But flocculate into oarse-grained ore deposit
Slurry is dispersed as little particle after agitation again, and effect of filtering agent is had a greatly reduced quality, and causes filter efficiency to reduce.
In the present embodiment, chemical feeding points are located at the pulp conveying between concentrate underflow filter mine-separating box 4 and vacuum filter 5
On pipeline (as shown in Figure 2), dosing mean concentration is 936ppm, and the mean utilization of vacuum filter 5 is 1.32t/m2·
H, average negative pressure of vacuum is -0.053mp, 5 days filter cloth replacing time, and the average moisture content of filter cake is 9.83%.
During using routine techniquess, chemical feeding points are located on concentrate underflow agitator mine-separating box 18, and dosing mean concentration is
1440ppm, the mean utilization of vacuum filter 5 is 0.943t/m2H, average negative pressure of vacuum is -0.054mp, and filter cloth is more
Change the time 5 days；The average moisture content of filter cake is 9.94%.
Compared with routine techniquess, filter aid saves 35% to the present embodiment, and vacuum filter 5 efficiency improves 39.98%, filter cake
Moisture content reduces 1.11%, improves filter efficiency and the quality of concentrate, greatly reduces filtration cost.
[embodiment 3]
As shown in figure 3, in the present embodiment, concentrate pulp filtration system is by by the concentrate pulp chute 1 being sequentially connected, concentrate
Concentrate big well 2, concentrate underflow pump a3, concentrate underflow agitator mine-separating box 18, concentrate underflow agitator 19, concentrate underflow pump b20
Form with filter press 21；The overfall of filter press 21 connects concentrate pulp chute 1 by overflow pipe；The present embodiment
In, it is provided with 2 groups of concentrate underflow agitators 19 and 3 groups of filter press 21, pass through corresponding ore pulp delivery duct respectively and connect.
Iron ore concentrate concentration be 20% about iron ore concentrate ore pulp by concentrate pulp chute 1 enter concentrate concentrate big well 2, in essence
Ore deposit concentrates in big well 2, goes through overflow after water process, and concentrate concentrates the underflow of big well 2 and obtains the concentrate pulp that concentration is more than 60%.
Concentrate pulp enters concentrate underflow agitator 19 through concentrate underflow agitator mine-separating box 18 in the presence of concentrate underflow pump a17,
Agitated temporary after, be delivered to concentrate underflow filter mine-separating box through ore pulp delivery duct in the presence of concentrate underflow pump b20
4, then be delivered to filter press 21 through ore pulp delivery duct and filter.
In the present embodiment, filter aid chemicals dosing plant by the filter aid holding vessel 7 being sequentially connected, filter aid feeding pump 8 and helps
Filtering agent head tank 9 forms；Filter aid head tank 9 connects each chemical feeding points by drug feeding pipeline.
In routine techniquess, the chemical feeding points being provided with the concentrate pulp filtration system of concentrate underflow agitator 19 are generally arranged at essence
On ore deposit ore pulp chute 1, concentrate underflow agitator 19 or concentrate underflow agitator mine-separating box 18；But flocculate into oarse-grained ore deposit
Slurry is dispersed as little particle after agitation again, and effect of filtering agent is had a greatly reduced quality, and causes filter efficiency to reduce.
As shown in figure 3, in the present embodiment, chemical feeding points are arranged between concentrate underflow agitator 19 and concentrate underflow pump b20
Ore pulp delivery duct on when, dosing mean concentration be 824ppm；Material feeding average time of filter press 21 is 71 seconds, averagely
Cycle period is 572 seconds, and filter cloth usage cycles are 3274 times, and filter cake average moisture content is 9.37%.
Using routine techniquess, when that is, filter aid chemical feeding points are located on concentrate underflow agitator mine-separating box 4, dosing mean concentration
For 1263ppm, material feeding average time of filter press 21 is 83 seconds, and mean period is 634 seconds, and filter cloth usage cycles are
1687 times, filter cake average moisture content is 9.81%.
Compared with routine techniquess, in the present embodiment, filter aid saves 34.76%, and filter press 21 efficiency improves
9.78%, filter cloth cycle stretch-out 94.07%, filter cake moisture content reduces 4.49%, improves filter efficiency and the quality of concentrate, greatly
Reduce greatly filtration cost.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (6)
1. a kind of concentrate pulp high efficiency filter method is it is characterised in that specifically include:
1) concentrate pulp filtration system is dense by the concentrate pulp chute being sequentially connected, the concentrate big well of concentration, concentrate underflow pump, concentrate
Slurry filter mine-separating box and vacuum filter composition；The overfall of vacuum filter and concentrate underflow filter mine-separating box passes through to overflow
Stream ore pulp delivery duct connects concentrate pulp chute；Filter aid chemicals dosing plant used by the filter aid holding vessel being sequentially connected, help
Filtering agent feeding pump and filter aid head tank composition；Filter aid head tank connects each chemical feeding points by dosing ore pulp delivery duct；Plus
Snack made with traditional Chinese medicines includes: on the pulp conveying ore pulp delivery duct that a. concentrate concentrates between big well and concentrate underflow pump, b. concentrate underflow pump
On pulp conveying ore pulp delivery duct and concentrate underflow filter mine-separating box between, c. concentrate underflow filter mine-separating box, d.
Concentrate underflow filters on the pulp conveying ore pulp delivery duct between mine-separating box and vacuum filter；A～c chemical feeding points can individually or
Combination setting, is arranged as required to 1～4；Filter aid chemicals dosing plant is controlled by Automatic Dosage Control of Additives system；
2) concentrate pulp filtration system concentrates big well, concentrate underflow pump a, concentrate by the concentrate pulp chute being sequentially connected, concentrate
Underflow agitator mine-separating box, concentrate underflow agitator, concentrate underflow pump b, concentrate underflow filter mine-separating box and vacuum filter
Composition；The overfall of vacuum filter and concentrate underflow filter mine-separating box connects concentrate pulp by overflow pulp conveyance conduit
Chute；Filter aid chemicals dosing plant used is by the filter aid holding vessel being sequentially connected, filter aid feeding pump and filter aid head tank group
Become；Filter aid head tank connects each chemical feeding points by dosing ore pulp delivery duct；Chemical feeding points include a. concentrate underflow agitator with
On pulp conveying ore pulp delivery duct between concentrate underflow pump b, b. concentrate underflow pump b and concentrate underflow filter mine-separating box it
Between pulp conveying ore pulp delivery duct on, c. concentrate underflow filter mine-separating box, d. concentrate underflow filter mine-separating box and vacuum
On pulp conveying ore pulp delivery duct between filter；A～c chemical feeding points can be arranged alone or in combination, it is arranged as required to 1～
4；Filter aid chemicals dosing plant is controlled by Automatic Dosage Control of Additives system；
3) concentrate pulp filtration system concentrates big well, concentrate underflow pump a, essence by by the concentrate pulp chute being sequentially connected, concentrate
Ore deposit underflow agitator mine-separating box, concentrate underflow agitator, concentrate underflow pump b and filter press composition；Filter press overflow
Head piece connects concentrate pulp chute by overflow pulp conveyance conduit；Filter aid chemicals dosing plant used is by the filter aid being sequentially connected
Holding vessel, filter aid feeding pump and filter aid head tank composition；Filter aid head tank passes through dosing ore pulp delivery duct and connects respectively
Chemical feeding points；On the pulp conveying ore pulp delivery duct that chemical feeding points include between a. concentrate underflow agitator and concentrate underflow pump b, b.
On pulp conveying ore pulp delivery duct between concentrate underflow pump b and filter press；A, b chemical feeding points can set alone or in combination
Put, be arranged as required to 1～2；Filter aid chemicals dosing plant is controlled by Automatic Dosage Control of Additives system.
2. a kind of concentrate pulp high efficiency filter method according to claim 1 is it is characterised in that described Automatic Dosage Control of Additives
Flow of slurry scale, filter aid flow meter, electrodynamic valve and solenoid valve block that system is connected respectively by control device and with control device
Become；Electromagnetic valve, electrodynamic valve and filter aid is set gradually on dosing ore pulp delivery duct between filter aid head tank and chemical feeding points
Flow meter, and electromagnetic valve and electrodynamic valve setting be located proximate to filter aid head tank；Before vacuum filter or filter press
Ore pulp delivery duct on set flow of slurry scale.
3. a kind of concentrate pulp high efficiency filter method according to claim 2 is it is characterised in that filter aid dosing is controlled automatically
Process processed is as follows:
1) before filter aid dosing, flow is set according to filter aid, corresponding aperture opened by electrodynamic valve；Electromagnetic valve is in cut out shape
State；
2) flow of slurry scale detected ore pulp flow through i.e. reading be more than zero when, pass the signal along in control device, control dress
Put control electromagnetic valve to open, filter aid starts dosing；Filter aid in filter aid head tank passes through dosing ore pulp delivery duct certainly
Stream flows to each chemical feeding points；The flow of filter aid flow meter real-time detection filter aid, and institute's flow measurement value is sent to control device
In；According to preset reduction formula, control device calculates the filter aid flow theory add value of corresponding mineral slurry flux automatically, and
The difference of this value and filter aid flow meter surveyed filter aid actual flow is converted to control signal be sent in electrodynamic valve, electronic
Valve adjusts the real-time traffic of filter aid accordingly；Measured filter aid real-time flow data is fed back to control by filter aid flow meter again
In device processed, so circulate, realize the real-time control of drainage agent flux；
3) at the end of ore pulp charging, the reading of flow of slurry scale is zero, and control device controls electrodynamic valve to close；Wait again 10 seconds with
Electromagnetic valve was closed after the upper time；Then reopen electrodynamic valve again, be ready for the process of filter aid dosing next time.
4. a kind of concentrate pulp high efficiency filter method according to claim 1 is it is characterised in that described filter aid head tank
In set float switch, float switch is linked with filter aid feeding pump, for controlling the liquid level in filter aid head tank.
5. a kind of concentrate pulp high efficiency filter method according to claim 1 it is characterised in that described chemical feeding points can set many
Individual point of chemical feeding points, each chemical feeding points or point filter aid added by chemical feeding points can identical it is also possible to different.
6. a kind of concentrate pulp high efficiency filter method according to claim 1 is it is characterised in that described control device is
Plc or computer.
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| CN108380377A (en) * | 2018-02-06 | 2018-08-10 | 鞍山市方业科技生化厂 | A method of improving the yield of reverse flotation iron concentrate reduces caustic soda dosage simultaneously |
| CN113600347A (en) * | 2021-07-21 | 2021-11-05 | 宜都兴发化工有限公司 | Filter-pressing release agent for phosphate rock flotation tailings and use method thereof |
| CN114849343A (en) * | 2022-04-29 | 2022-08-05 | 鞍山市方业科技生化厂 | Method for adding filter aid into filter system |
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| CN114849343A (en) * | 2022-04-29 | 2022-08-05 | 鞍山市方业科技生化厂 | Method for adding filter aid into filter system |
| CN114849343B (en) * | 2022-04-29 | 2023-10-03 | 鞍山市方业科技生化厂 | Method for adding filter aid to filtration system |
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