CN106362480B - A kind of concentrate pulp high efficiency filter method - Google Patents
A kind of concentrate pulp high efficiency filter method Download PDFInfo
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- CN106362480B CN106362480B CN201611059495.0A CN201611059495A CN106362480B CN 106362480 B CN106362480 B CN 106362480B CN 201611059495 A CN201611059495 A CN 201611059495A CN 106362480 B CN106362480 B CN 106362480B
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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 present invention relates to a kind of concentrate pulp high efficiency filter methods, and in the concentrate pulp filtration system for not setting concentrate underflow agitator, the chemical feeding points setting of filter aid is after concentrate concentrates big well；In the concentrate pulp filtration system equipped with concentrate underflow agitator, the chemical feeding points of filter aid are arranged after concentrate underflow agitator；Filter aid chemicals dosing plant is made of sequentially connected filter aid holding vessel, filter aid feeding pump and filter aid head tank, and is controlled by Automatic Dosage Control of Additives system；Flow of slurry scale, filter aid flowmeter, motor-driven valve and the solenoid valve block that Automatic Dosage Control of Additives system is connect by control device and respectively with control system at；According to different concentrate pulp filtration systems filter aid chemical feeding points are rationally arranged, and control dosage by Automatic Dosage Control of Additives system in the present invention；To greatly improve concentrate pulp filter efficiency, filter cake moisture content is reduced.
Description
Technical field
The present invention relates to slurry filtration and sludge press filtration technical fields, more particularly to one kind being suitable for iron ore, aluminium ore, coal mine
Or the concentrate pulp high efficiency filter method of other slurry filtrations and sludge press filtration process.
Background technology
In iron ore concentrate ore dressing process, the filtering of concentrate pulp is the important process factor in ore dressing process, it is to iron essence
The production cost of mine, the quality of iron ore concentrate can all play critically important effect.
In existing ore-dressing technique, powder particle size degree of refinement and fine granularity miberal powder proportion are continuously increased after ore grinding,
In addition miberal powder by reverse flotation roughing drop it is 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, just to production system
Often operation brings adverse effect.In existing concentrate pulp dewatering process, raising filtering effect can only be reached by adding filter aid
Rate reduces filter cake moisture, reduces the purpose of investment in technological transformation, and meet moisture requirement of the postorder operation to concentrate.
Filter aid is for reducing the medicament of filter cake moisture, raising filter efficiency, and main function is：1) it plays flocculated
Effect makes short grained mineral become bulky grain, and increase water penetration prevents tiny mineral from blocking filter cloth simultaneously.2) concentrate mine is reduced
The viscosity of slurry increases the mobility of concentrate pulp, is more conducive to filtering.
In technology disclosed in existing literature, the set-up mode of filter aid chemical feeding points has following 3 kinds：1) it is arranged in concentrate pulp
Chute；2) it is arranged in concentrate underflow agitator mine-separating box；3) it is arranged above concentrate underflow agitator.This 3 kinds of chemical feeding points settings
There is following defects for mode：Before being set to concentrate pulp agitator due to chemical feeding points, it can cause to flocculate into big
The ore pulp of grain is dispersed as little particle again after entering concentrate underflow agitator, original effect is lost, to largely effect on
Filter efficiency.
Invention content
The present invention provides a kind of concentrate pulp high efficiency filter methods, according to different concentrate pulp filtration systems, rationally
Filter aid chemical feeding points are set, and dosage is controlled by Automatic Dosage Control of Additives system；To greatly improve concentrate pulp filtering effect
Rate reduces filter cake moisture content.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of concentrate pulp high efficiency filter method, specifically includes：
1) concentrate pulp filtration system concentrates big well, concentrate underflow pump, essence by sequentially connected concentrate pulp chute, concentrate
Mine underflow filter mine-separating box and vacuum filter composition；The overflow port of vacuum filter and concentrate underflow filter mine-separating box is logical
Cross overflow pipe connection concentrate pulp chute；Filter aid chemicals dosing plant used is by sequentially connected filter aid holding vessel, 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. smart
Mine concentrates on the ore pulp delivery duct 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 filters mine-separating box, d. concentrate underflows filtering mine-separating box and vacuum filter
Between ore pulp delivery duct on；A~c chemical feeding points can be arranged alone or in combination, be 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 sequentially connected concentrate pulp chute, 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；Vacuum filter connects concentrate pulp stream with the overflow port of concentrate underflow filter mine-separating box by overflow pipe
Slot；Filter aid chemicals dosing plant used is made of sequentially connected filter aid holding vessel, 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 agitators 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. on the ore pulp delivery duct between concentrate underflow filter mine-separating box, d. concentrate underflows filtering mine-separating box and vacuum filter；a
~c chemical feeding points can be arranged alone or in combination, be arranged as required to 1~4；Filter aid chemicals dosing plant passes through Automatic Dosage Control of Additives system
System control；
3) concentrate pulp filtration system by sequentially connected concentrate pulp chute, concentrate by concentrating big well, concentrate underflow pump
A, concentrate underflow agitator mine-separating box, concentrate underflow agitator, concentrate underflow pump B and plate and frame filter press composition；Plate and frame filter press
Overflow port pass through overflow pipe connect concentrate pulp chute；Filter aid chemicals dosing plant used is stored by sequentially connected filter aid
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 agitators and concentrate underflow pump B, b. concentrate underflow pump B and plate compression
On ore pulp delivery duct between machine；A, b chemical feeding points can be arranged alone or in combination, be arranged as required to 1~2；Filter aid adds
Medicine device is controlled by Automatic Dosage Control of Additives system.
Flow of slurry scale, the filter aid that the Automatic Dosage Control of Additives system is connect by control device and respectively with control device
Flowmeter, motor-driven valve and solenoid valve block at；Set gradually in drug feeding pipeline between filter aid head tank and chemical feeding points solenoid valve,
Motor-driven valve and filter aid flowmeter, and solenoid valve and motor-driven valve setting be located proximate to filter aid head tank；Vacuum filter or
Flow of slurry scale is set on ore pulp delivery duct before plate and frame 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, motor-driven valve is opened to corresponding aperture；Solenoid valve, which is in, closes
State；
2) when 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 solenoid valve and opens；Filter aid in filter aid head tank is flow automatically by drug feeding pipeline to be flowed to
Each chemical feeding points；Flow of slurry scale detects the flow of concentrate pulp in real time, and institute's flow measurement magnitude is sent in control device；According to
Preset reduction formula, control device calculates corresponding filter aid flow theory add value automatically, and the value is converted to control
Signal processed is sent in motor-driven valve, and motor-driven valve adjusts the real-time traffic of filter aid accordingly；Filter aid flowmeter again will be measured
Filter aid real-time flow data feed back in control device, so recycle, realize drainage agent flux real-time control；
3) after filter aid dosing, motor-driven valve is closed；When waiting for that the reading of flow of slurry scale is zero, then waiting for 10 seconds or more
Between, it is then shut off solenoid valve；Motor-driven valve is reopened again, is ready for the process of filter aid dosing next time.
Float switch is set in the filter aid head tank, float switch links with filter aid feeding pump, for controlling drainage
Liquid level in agent head tank.
The chemical feeding points can set multiple points of chemical feeding points, each chemical feeding points or divide filter aid added by chemical feeding points identical, also may be used
With difference.
The control device is PLC or computer.
Compared with prior art, the beneficial effects of the invention are as follows：
1) different chemical feeding points positions is set according to different filtration systems, in the concentrate mine for not setting concentrate underflow agitator
It starches in filtration system, the chemical feeding points setting of filter aid is after concentrate concentrates big well；In the concentrate equipped with concentrate underflow agitator
In slurry filtration system, the chemical feeding points of filter aid are arranged after concentrate underflow agitator, prevent the mine of the bulky grain after flocculation
Slurry is dispersed as little particle again after entering concentrate underflow agitator, to improve filter efficiency, reduces filter cake moisture content；
2) one-point or multi-point dosing can be set as needed, continuous dosing amount is controlled by Automatic Dosage Control of Additives system, is protected
The mixing match of filter aid and concentrate pulp is demonstrate,proved, and the two is uniformly mixed；
3) in Automatic Dosage Control of Additives system, in such a way that motor-driven valve and solenoid valve combine, when avoiding motor-driven valve because of reaction
Between slowly occur delay dosing phenomenon, ensure best dosing effect.
Description of the drawings
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：1. 2. concentrate of concentrate pulp chute, which concentrates big 3. concentrate underflow pump of well, 4. concentrate underflow filter, divides mine
5. vacuum filter of case, 6. filter aid discharging pumps 7. filter aid holding vessel, 8. drainage machine feeding pump, 9. filter aid head tank
10. 11. 14. motor-driven valve of filter aid head tank overflow pipe 12. control device, 13. solenoid valve of float switch, 15. filter aid stream
16. flow of slurry scale of scale, 17. concentrate underflow pump A, 18. concentrate underflow agitator mine-separating boxs, 19. concentrate underflow agitator
20. 21. plate and frame filter press of concentrate underflow pump B, 22. flood pump 23. divides mine motor-driven valve
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
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 sequentially connected concentrate pulp chute 1, 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 the filtering of concentrate underflow
The overflow port of machine mine-separating box 4 connects concentrate pulp chute 1 by overflow pipe；Filter aid chemicals dosing plant used is by 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：A. concentrate concentrate on the ore pulp delivery duct between big well 2 and concentrate underflow pump 3, b. concentrate it is dense
On ore pulp delivery duct between stock pump 4 and concentrate underflow filter mine-separating box 4, c. concentrate underflow filters mine-separating box 4, d. essence
Mine underflow filters on the ore pulp delivery duct between mine-separating box 4 and vacuum filter 5；A~c chemical feeding points can be set alone or in combination
It sets, is 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 sequentially connected concentrate pulp chute 1, 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 overflow port 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 sequentially connected filter aid holding vessel 7, 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 filters mine-separating box 4, d. concentrate underflows filtering divide mine
On ore pulp delivery duct between case 4 and vacuum filter 5；A~c chemical feeding points can be arranged alone or in combination, be 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 by sequentially connected concentrate pulp chute 1, concentrate by concentrating big well
2, 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 overflow port of plate and frame filter press 21 connects concentrate pulp chute 1 by overflow pipe；Filter aid dosing dress used
It sets and is made of sequentially connected filter aid holding vessel 7, filter aid feeding pump 8 and filter aid head tank 9；Filter aid head tank 9 is logical
It crosses drug feeding pipeline and connects each chemical feeding points；Chemical feeding points include the ore pulp between a. concentrate underflows agitator 19 and concentrate underflow pump B20
On ore pulp delivery duct on conveyance conduit, between b. concentrate underflow pump B20 and plate and frame filter press 21；A, b chemical feeding points can be independent
Or combination settings, 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, the Automatic Dosage Control of Additives system is connect by control device 12 and respectively with control device 12
Flow of slurry scale 16, filter aid flowmeter 15, motor-driven valve 14 and solenoid valve 13 form；Filter aid head tank 9 and chemical feeding points it
Between drug feeding pipeline on set gradually solenoid valve 13, motor-driven valve 14 and filter aid flowmeter 15, and solenoid valve 13 and motor-driven valve 14
What is be arranged is located proximate to filter aid head tank 9；Mine is set on ore pulp delivery duct before vacuum filter 5 or plate and frame filter press 21
Starch flowmeter 16.
Filter aid Automatic Dosage Control of Additives process is as follows：
1) before filter aid dosing, flow is set according to filter aid, motor-driven valve 14, which is opened, arrives corresponding aperture；Solenoid valve 13 is in
Closed state；
2) when filter aid dosing, flow of slurry scale 16 detected ore pulp flow through i.e. reading be more than zero when, signal is transmitted
Into control device 12, control device 12 controls solenoid valve 13 and opens；Filter aid in filter aid head tank 9 passes through drug feeding pipeline
Flow to each chemical feeding points；Flow of slurry scale 16 detects the flow of concentrate pulp in real time, and institute's flow measurement magnitude 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
By value conversion, signal is sent in motor-driven valve 14 in order to control, and motor-driven valve 14 adjusts the real-time traffic of filter aid accordingly；Filter aid
Flowmeter 16 again feeds back to measured filter aid real-time flow data in control device 12, so recycles, and realizes filter aid
The real-time control of flow；
3) after filter aid dosing, motor-driven valve 14 is closed；Wait for that the reading of flow of slurry scale 16 is zero, then wait for 10 seconds with
The upper time is then shut off solenoid valve 13；Motor-driven valve 14 is reopened again, is ready for the process of filter aid dosing next time.
Float switch 10 is set in the filter aid head tank 9, float switch 10 links with filter aid feeding pump 8, for controlling
Liquid level in filter aid head tank 9 processed.
The chemical feeding points can set multiple points of chemical feeding points, each chemical feeding points or divide filter aid added by chemical feeding points identical, also may be used
With difference.
The control device 12 is PLC or computer.
Application No. is 87202472 Chinese patents to disclose 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 and ore pulp mounted in raw ore slurry coming expects pipe road
Densimeter forms, further include one mounted in loading total main pipe road to measure medicament tiny flow quantity throttling differential pressure flowmeter,
Microprocessor and several loading branch lines branched out from the total main pipe road direction floatation system of loading, in every loading branch
Several chemical feeding points being arranged on pipeline ".The technical solution is for monitoring the electromagnetic flowmeter of mineral slurry flux and for monitoring mine
The ore pulp concentration meter of slurry concentration is arranged at raw ore slurry coming expects pipe road, therefore can only monitor the mineral slurry flux in ore pulp manifold
And concentration；Throttling differential pressure flowmeter for monitoring medicament flow is mounted on the total main pipe road of loading, therefore can only monitor to add
Medicament flow in medicine manifold；System sets a medicine mine ratio after obtaining the flow signal and concentration signal of floating raw ore slurry
Example coefficient signal, is multiplied through multiplier, a Setting signal for being proportional to additive amount of medicament needed for floating dry mine content is obtained, with section
The actual dose additive amount signal of stream differential pressure flowmeter output is compared, and deviation signal is through PID regulator and analog-to-digital conversion
Device, obtains the pulse signal of corresponding frequencies, and driving monostable switch controls the dosing by the ratio of the required of dosing solenoid valve.And specific to
The dosage size of each chemical feeding points can only be when to set floatation system dosage be 1, then each to add by technological requirement pro rate
The allocation proportion of snack made with traditional Chinese medicines is the coefficient less than 1, summation 1.It is limited by technical conditions at that time, the technical solution structure is multiple
It is miscellaneous, and each chemical feeding points can only be by technological requirement pro rate dosage, although realizing the close-loop automatic adjustment of dosing, its
In contrast the levels of precision of dosing can only be.
The present invention is to set solenoid valve, motor-driven valve successively in drug feeding pipeline between filter aid head tank and chemical feeding points and help
Filtering agent flowmeter sets flow of slurry scale, therefore convection current on the ore pulp delivery duct between vacuum filter or plate and frame filter press
The mineral slurry flux and drainage agent flux for entering each filter plant can be monitored accurately, be regulated and controled in time.Its is simple in structure, and reaction is fast
Speed is adjusted accurate.Simultaneously in such a way that motor-driven valve is combined with solenoid valve, motor-driven valve is avoided to add because delay occurs slowly for the reaction time
Medicine phenomenon ensure that best dosing effect.
Following embodiment is being implemented down based on the technical solution of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment 1】
As shown in Figure 1, in the present embodiment, concentrate pulp filtration system is dense by sequentially connected concentrate pulp chute 1, concentrate
Contract big well 2, concentrate underflow pump 3, concentrate underflow filter mine-separating box 4 and the composition of vacuum filter 5；Vacuum filter 5 and concentrate
The overflow port of underflow filter mine-separating box 4 connects concentrate pulp chute 1 by overflow pipe, and flood pump 22 is set on overflow pipe.
The iron ore concentrate ore pulp of iron ore concentrate a concentration of 20% or so enters concentrate by concentrate pulp chute 1 and concentrates big well 2, in essence
Mine concentrates in big well 2, and after water process is gone in overflow, concentrate concentrates 2 underflow of big well and obtains a concentration of 60% or more concentrate pulp,
Concentrate pulp is directly sent to clear mine underflow filter mine-separating box 4 under the action of concentrate underflow pump 3 through ore pulp delivery duct, then divides
It is sent in 3 groups of vacuum filters 5 and filters；The overflowing liquid of vacuum filter 5 and concentrate underflow filter mine-separating box 4 is pumped through overflow
Return to concentrate pulp chute 1.
Filter aid chemicals dosing plant used in the present embodiment is by sequentially connected filter aid holding vessel 7, filter aid feeding pump 8 and helps
Filtering agent head tank 9 forms；Filter aid holding vessel 9 pumps the 6 tank car loading and unloading materials from transport filter aid by filter aid discharging.Filter aid
Head tank 9 connects each chemical feeding points by drug feeding pipeline.The overflow port of filter aid head tank 9 passes through filter aid head tank overflow pipe 11
Connect filter aid holding vessel 7.
In routine techniques, in the concentrate pulp filtration system for 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 carried out, can cause a large amount of streams of filter aid
It loses, not only results in the wasting of resources, cost increases, and subsequent filter efficiency is caused to reduce.Chemical feeding points are arranged the present invention
After concentrate concentrates big well 2 ore pulp delivery duct or equipment on, can avoid filter aid loss.
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 are arranged 1, that is, the mine between concentrate underflow filter mine-separating box 4 and each group vacuum filter 5 are arranged
It starches on conveyance conduit, be equipped with flow of slurry scale 16 on the ore pulp delivery duct simultaneously and divide mine motor-driven valve 23, divide mine motor-driven valve 23
With the control system interlocked control of vacuum filter 5.
【Embodiment 2】
As shown in Fig. 2, the concentrate pulp filtration system of the present embodiment is dense by sequentially connected concentrate pulp chute 1, 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；Vacuum filter 5 and concentrate underflow filter mine-separating box 4 overflow
Head piece connects concentrate pulp chute 1 by overflow pipe；In the present embodiment, it is equipped with 2 groups of concentrate underflow agitators 19 and 3 groups of vacuum
Filter 5.
The iron ore concentrate ore pulp of iron ore concentrate a concentration of 20% or so enters concentrate by concentrate pulp chute 1 and concentrates big well 2, in essence
Mine concentrates in big well 2, and after water process is gone in overflow, concentrate concentrates 2 underflow of big well and obtains a concentration of 60% or more concentrate pulp.
Concentrate pulp enters concentrate underflow agitator 19 under the action of concentrate underflow pump A17 through concentrate underflow agitator mine-separating box 18,
It is agitated it is temporary after, be delivered to concentrate underflow filter mine-separating box through ore pulp delivery duct under the action 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 is by sequentially connected filter aid holding vessel 7, 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 techniques, the chemical feeding points of the concentrate pulp filtration system equipped with concentrate underflow agitator 19 are generally arranged at essence
On mine ore pulp chute 1, concentrate underflow agitator 19 or concentrate underflow agitator mine-separating box 18；But flocculate into the mine of bulky grain
The effect of slurry is dispersed as little particle again after agitation, filtering agent is had a greatly reduced quality, and filter efficiency is caused 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 are -0.053mp, and the average moisture content of 5 days filter cloth replacing time, filter cake are 9.83%.
When using routine techniques, chemical feeding points are located on concentrate underflow agitator mine-separating box 18, and dosing mean concentration is
The mean utilization of 1440ppm, vacuum filter 5 are 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%.
The present embodiment is compared with routine techniques, and filter aid saves 35%, and 5 efficiency of vacuum filter improves 39.98%, filter cake
Moisture content reduces 1.11%, improves filter efficiency and the quality of concentrate, greatly reduces filtering cost.
【Embodiment 3】
As shown in figure 3, in the present embodiment, concentrate pulp filtration system is by by sequentially connected concentrate pulp chute 1, concentrate
Concentrate big well 2, concentrate underflow pump A3, concentrate underflow agitator mine-separating box 18, concentrate underflow agitator 19, concentrate underflow pump B20
It is formed with plate and frame filter press 21；The overflow port of plate and frame filter press 21 connects concentrate pulp chute 1 by overflow pipe；The present embodiment
In, 2 groups of concentrate underflow agitators 19 and 3 groups of plate and frame filter press 21 are equipped with, are connected respectively by corresponding ore pulp delivery duct.
The iron ore concentrate ore pulp of iron ore concentrate a concentration of 20% or so enters concentrate by concentrate pulp chute 1 and concentrates big well 2, in essence
Mine concentrates in big well 2, and after water process is gone in overflow, concentrate concentrates 2 underflow of big well and obtains a concentration of 60% or more concentrate pulp.
Concentrate pulp enters concentrate underflow agitator 19 under the action of concentrate underflow pump A17 through concentrate underflow agitator mine-separating box 18,
It is agitated it is temporary after, be delivered to concentrate underflow filter mine-separating box through ore pulp delivery duct under the action of concentrate underflow pump B20
4, then be delivered to plate and frame filter press 21 through ore pulp delivery duct and filter.
In the present embodiment, filter aid chemicals dosing plant is by sequentially connected filter aid holding vessel 7, 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 techniques, the chemical feeding points of the concentrate pulp filtration system equipped with concentrate underflow agitator 19 are generally arranged at essence
On mine ore pulp chute 1, concentrate underflow agitator 19 or concentrate underflow agitator mine-separating box 18；But flocculate into the mine of bulky grain
The effect of slurry is dispersed as little particle again after agitation, filtering agent is had a greatly reduced quality, and filter efficiency is caused 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；The material feeding average time of plate and frame filter press 21 is 71 seconds, average
Cycle period is 572 seconds, and filter cloth service life is 3274 times, and filter cake average moisture content is 9.37%.
Using routine techniques, i.e., when filter aid chemical feeding points are located on concentrate underflow agitator mine-separating box 4, dosing mean concentration
Material feeding average time for 1263ppm, plate and frame filter press 21 is 83 seconds, and mean period is 634 seconds, and filter cloth service life is
1687 times, filter cake average moisture content is 9.81%.
Compared with routine techniques, in the present embodiment, filter aid saves 34.76%, and 21 efficiency of plate and frame filter press 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 filtering cost greatly.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of concentrate pulp high efficiency filter method, which is characterized in that according to different concentrate pulp filtration systems, be rationally arranged
Filter aid chemical feeding points, and dosage is controlled by Automatic Dosage Control of Additives system；It specifically includes：
1) concentrate pulp filtration system is dense by sequentially connected concentrate pulp chute, the big well of concentrate concentration, concentrate underflow pump, concentrate
Starch filter mine-separating box and vacuum filter composition；The overflow port of vacuum filter and concentrate underflow filter mine-separating box is by overflowing
It flows ore pulp delivery duct and connects concentrate pulp chute；Filter aid chemicals dosing plant used by sequentially connected filter aid holding vessel, 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；Add
Snack made with traditional Chinese medicines includes：A. concentrate concentrate on the pulp conveying ore pulp delivery duct between big well and concentrate underflow pump, b. concentrate underflow pumps
On pulp conveying ore pulp delivery duct between concentrate underflow filter mine-separating box, c. concentrate underflow filters 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 individually or group
Setting is closed, 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 sequentially connected concentrate pulp chute, concentrate
Underflow agitator mine-separating box, concentrate underflow agitator, concentrate underflow pump B, concentrate underflow filter mine-separating box and vacuum filter
Composition；Vacuum filter connects concentrate pulp with the overflow port of concentrate underflow filter mine-separating box by overflow pulp conveyance conduit
Chute；Filter aid chemicals dosing plant used is by sequentially connected filter aid holding vessel, filter aid feeding pump and filter aid head tank group
At；Filter aid head tank connects each chemical feeding points by dosing ore pulp delivery duct；Chemical feeding points include a. concentrate underflow agitators 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 filters mine-separating box, d. concentrate underflows filtering mine-separating box and vacuum
On pulp conveying ore pulp delivery duct between filter；A~c chemical feeding points are arranged alone or in combination, are arranged as required to 1~4
It is a；Filter aid chemicals dosing plant is controlled by Automatic Dosage Control of Additives system；
3) concentrate pulp filtration system by sequentially connected concentrate pulp chute, concentrate by concentrating big well, concentrate underflow pump A, essence
Mine underflow agitator mine-separating box, concentrate underflow agitator, concentrate underflow pump B and plate and frame filter press composition；Plate and frame filter press overflows
Head piece connects concentrate pulp chute by overflow pulp conveyance conduit；Filter aid chemicals dosing plant used is by sequentially connected filter aid
Holding vessel, filter aid feeding pump and filter aid head tank composition；Filter aid head tank is connected each by dosing ore pulp delivery duct
Chemical feeding points；Chemical feeding points include on pulp conveying ore pulp delivery duct between a. concentrate underflow agitators and concentrate underflow pump B, b.
On pulp conveying ore pulp delivery duct between concentrate underflow pump B and plate and frame filter press；A, b chemical feeding points are arranged alone or in combination,
It is 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, which is characterized in that the Automatic Dosage Control of Additives
Flow of slurry scale, filter aid flowmeter, motor-driven valve and the solenoid valve block that system is connect by control device and respectively with control device
At；Solenoid valve, motor-driven valve and filter aid are set gradually on dosing ore pulp delivery duct between filter aid head tank and chemical feeding points
Flowmeter, and solenoid valve and motor-driven valve setting be located proximate to filter aid head tank；Before vacuum filter or plate and frame 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, which is characterized 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, motor-driven valve is opened to corresponding aperture；Solenoid valve, which is in, closes 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
It sets control solenoid valve to open, filter aid starts dosing；Filter aid in filter aid head tank by dosing ore pulp delivery duct from
Stream flows to each chemical feeding points；Filter aid flowmeter detects the flow of filter aid in real time, and institute's flow measurement magnitude 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
By the value and the conversion of the difference of the surveyed filter aid actual flow of filter aid flowmeter, signal is sent in motor-driven valve in order to control, 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 flowmeter again
It in device processed, so recycles, realizes 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 motor-driven valve and closes；Wait for again 10 seconds with
Solenoid valve was closed after the upper time；Then motor-driven valve is reopened again, is ready for the process of filter aid dosing next time.
4. a kind of concentrate pulp high efficiency filter method according to claim 1, which is characterized in that the filter aid head tank
In set float switch, float switch links 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, which is characterized in that the control device is
PLC or computer.
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| CN113600347B (en) * | 2021-07-21 | 2022-11-08 | 宜都兴发化工有限公司 | Filter-pressing release agent for phosphate rock flotation tailings and use method thereof |
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| US4544490A (en) * | 1984-01-09 | 1985-10-01 | Rexnord Inc. | Method and system for recovering coal fines from pipe line coal slurry |
| CN100391574C (en) * | 2006-04-25 | 2008-06-04 | 开滦精煤股份有限公司范各庄矿业分公司 | Process for dehydrating floatation coal |
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