CN109621500A - A method of improving deep cone thickener underflow density - Google Patents
A method of improving deep cone thickener underflow density Download PDFInfo
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- CN109621500A CN109621500A CN201811487118.6A CN201811487118A CN109621500A CN 109621500 A CN109621500 A CN 109621500A CN 201811487118 A CN201811487118 A CN 201811487118A CN 109621500 A CN109621500 A CN 109621500A
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- thickener
- adjustment
- flocculant
- control
- deep cone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/30—Control equipment
- B01D21/32—Density control of clear liquid or sediment, e.g. optical control ; Control of physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/30—Control equipment
- B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
Abstract
The invention discloses a kind of methods for improving deep cone thickener underflow density, according to the production actual conditions and operating experience of tailing high concentration storage system, achieve the purpose that promote deep cone thickener underflow density by multiple inspection, multiple control and multinomial adjustment, and save mass production water, Tailings Dam occupied area is small, safety of dam body coefficient is high, and stability is good, and environmental benefit is prominent.
Description
Technical field
The present invention relates to a kind of methods for improving deep cone thickener underflow density.
Background technique
Original tailing high-concentration dry heap method routine tailings processing method: 1. thickener startup programs: starting thickener drives
Dynamic motor；It is filled the water in toward thickener；Start flocculant pump；Flocculating effect in feedwell is monitored, suitable charging rate is grasped；If
Flocculant is set to automatically control；Start underflow pump when the formation of mud bed.2. points for attention in operating: whether each pipeline, valve block
Or dew mine；Whether motor working current is normal；Whether each portion's grease, oil level lubricate in place；Each transmission parts whether abnormal voice.
3. thickener stopping procedure: closing thickener charging；Empty concentration basin；Stop thickener driving motor after pond emptying to be concentrated；
Dirt in flushed channel body.
Passing through above maneuver major defect are as follows: original maneuver is mainly made an issue of in thickener single devices,
Without systematicness well, so that post operation is improper arrangement.The operating method is merely able to provide in stopping procedure and operating
Points for attention, and natural labor, up to postpartum, we should have higher requirement, past maneuver can not meet demand at this stage.
The feature of systematicness difference, the final formation for influencing high-concentration underflow is presented.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of sides for improving deep cone thickener underflow density
Method.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A method of deep cone thickener underflow density is improved, is included the following steps:
S1, inspection
Whether in safe range to check muddy layer height；Check whether big well liquid face rotates；Check whether flocculant has
Caking phenomenon；Check whether flocculant add-on system has air entrance；Check whether dilution water water quality meets the requirements；Check overflow
Whether water turbidity meets the requirements；
S2, control
Thickener materials inside is controlled to balance, control concentrator rake revolving speed, control mud bed height, control medicament addition surely
It is fixed；
S3, adjustment
Adjust thickener input concentration, adjustment feeding pump rate of discharge, adjustment flocculant concentration point flow, adjustment dilution water
Flow, adjustment flocculant matched proportion density.
Further, whether inspection requirements in safe range is turbid layer height: turbidity screen is not more than in operational process
1m, inspection cycle are 1 hour；When checking whether big well liquid face rotates, observing time is not less than 10 minutes, confirms whether it goes out
Existing rotation phenomenon.
Further, it when checking whether flocculant has caking phenomenon, carries out within every 2 hours once, inspection method is to flocculate
Agent prepares case and storage bin sewage pipe gives off the medicament prepared on a small quantity, touches whether it agglomerates with feel, and processing method is will
The medicament that agglomerates is discharged by sewage draining exit, while reducing medicament configuration concentration；Check whether flocculant add-on system has air entrance
Method be to observe whether big well liquid face has bubble to emerge the water surface, while being vented to flocculant transfer pipeline and ore pulp feeding pipe
Valve checked, inspection cycle is 2 hours, if discovery have air enter should each pipeline of inspection immediately, valve, carry out in time close
Envelope processing.
Further, when checking whether dilution water water quality meets the requirements, the inspection cycle of dilution water water quality is 2 times/class,
Inspection method is to be sampled to dilution water, sedimentation experiment is carried out to quantitative ore pulp using transparent vessel, if the ore pulp in 10 seconds
It can settle completely, then illustrate that dilution water medicament is saturated, thickener flocculant additive amount need to be replaced or reduced to dilution water；Inspection
Whether when looking into overflow water turbidity and meeting the requirements, inspection method is to be overflow to carry out two position sample liquid of concentration overflow with turbidity
Turbidity test is less than the overflow water turbidity that 50ppm is qualification to meet, and inspection cycle is 1 hour.
Further, controlling the material balance inside thickener is control thickener inlet amount and row's tail amount, so that concentration
Solids bulk amount inside machine maintains constant level always；Wherein the adjustment of the feed surge of deep cone thickener is underflow row's tail
The adjustment of amount is realized inside thickener for adjustment target using adjusting underflow pump frequency as measure so that thickener mud bed height is constant
Material balance.
Further, when controlling concentrator rake revolving speed, the control of concentrator rake speed is in 10-20Hz, with concentration
Machine torque is control target in 25-30%, adjusts amplitude by concentrator rake revolving speed of 1Hz, 0.135r/min.
Further, the height of mud bed controls below aqueduct height 12m when controlling mud bed height；Control medicament addition
Stable control condition is that pharmaceutical quantities are added to 21g/t dry mine.
Further, the pulp density that thickener input concentration is 10%；During the adjustment of feeding pump rate of discharge, begin
The control of pipe outlet pressure is in 500-550kpa at last, and to adjust feeding pump frequency as method, adjustment amplitude is 1Hz, 590r/
Min, adjustment period are 0.5 hour.
Further, the mode of flocculant concentration point flow is adjusted are as follows: the chemical feeding points of flocculant are distributed in thickener charging
Four different positions of well top, are followed successively by 1#, 2#, 3#, 4# chemical feeding points from feedstock direction, by adjusting the valve of each chemical feeding points
Door aperture carries out, and adjustment amplitude is 3 degree, and the adjustment period is 0.5 hour, and it is 45 that when adjustment, which resets primary condition as valve opening,
Degree, 1#, 2# chemical feeding points are to increase valve opening adjustment, and aperture is 60 degree, and 3#, 4# chemical feeding points are to reduce valve opening adjustment, are opened
Degree is 30 degree.
Further, the adjustment of dilution water flow is adjusted by the frequency conversion of fresh water pump and is carried out, and flocculant is finally diluted to
3/20000ths to ten thousand/10000ths；The matched proportion density of flocculant is adjusted to 1.9 ‰ -2.3 ‰.
Compared with prior art, advantageous effects of the invention:
The method of the raising deep cone thickener underflow density, effect is obvious, and effect is significant, and considerable benefit can not only have
The raising tailing underflow discharge concentration of effect provides foundation for operator's reasonable operation, while to explore tailing maximum discharge concentration
Road on lay a solid foundation.And save mass production water；Tailings Dam occupied area is small；Safety of dam body coefficient is high, surely
It is qualitative good；Environmental benefit protrusion etc..
Detailed description of the invention
The invention will be further described for explanation with reference to the accompanying drawing.
Fig. 1 is the relational graph of mud bed height and underflow density；
Fig. 2 is the relational graph of flocculation dosage and underflow density；
Fig. 3 is the relational graph of flocculant concentration and underflow density.
Specific embodiment
A method of deep cone thickener underflow density is improved, specific steps are as follows:
1: checking: whether in safe range checking muddy layer height；Check whether big well liquid face rotates；Check flocculant
Whether caking phenomenon is had；Check whether flocculant add-on system has air entrance；Check whether dilution water water quality meets the requirements；Inspection
Look into whether overflow water turbidity meets the requirements.
2: control: control thickener materials inside balance；Control concentrator rake revolving speed；Control mud bed height；Control medicine
Agent addition is stablized.
3: adjustment: adjustment thickener input concentration；Adjust feeding pump rate of discharge；Adjust flocculant concentration point flow；It adjusts
Whole dilution water flow；Adjust flocculant matched proportion density.
1, it checks
Whether in safe range 1.1 check muddy layer height
Turbidity screen is unsuitable excessively high in operational process, be within 1 meter it is best, it is muddy and not that turbidity screen height be easy to cause big well to run
Conducive to the formation of high concentration mud bed, inspection cycle is 1 hour, and inspection method is to carry out manual measurement with self-control Flat bottom container.
1.2 check whether big well liquid face rotates
There is the performance that rotation phenomenon is concentration systems fluctuation of service in the process of running in thickener liquid level, influences to flocculate
Effect, need to per hour observe big well liquid face, and observing time is no less than 10 minutes, and it is existing to confirm whether it rotation occurs
As.
Whether 1.3 inspection flocculants have caking phenomenon
The excellent dissolution of flocculant is the guarantee that flocculant system operates normally, while being also related to good flocculating effect
It realizes.Inspection to flocculant with the presence or absence of caking phenomenon should carry out once for every 2 hours, and inspection method is to prepare case in flocculant
The medicament prepared on a small quantity is given off with storage bin sewage pipe, touches whether it agglomerates with feel.Processing method is the medicament that will agglomerate
It is discharged by sewage draining exit, while reducing medicament configuration concentration.
Whether 1.4 inspection flocculant add-on systems have air entrance
Air is forbidden to bring into flocculant mechanism, the air brought into will seriously affect the shape of ore pulp particle floc sedimentation
At.The method of air entrance is checked whether there is to observe whether big well liquid face has bubble to emerge the water surface, while flocculant is conveyed
Pipeline and ore pulp feeding pipe drain tap are checked that inspection cycle is 2 hours.If should inspection immediately it was found that there is air to enter
Each pipeline, valve are sealed processing in time.
Whether 1.5 inspection dilution water water quality meet the requirements
Dilution water provides for thickener overflow water and reservoir area return water, inside have residual flocculant presence, medicament residual
Biggish water, which is measured, as dilution water will cannot play dilution effect to flocculant, so periodically its water quality should be checked,
The inspection cycle of dilution water water quality is 2 times/class, and inspection method is to be sampled to dilution water, using transparent vessel to quantitative mine
Slurry carries out sedimentation experiment, if ore pulp can settle completely in 10 seconds, illustrates that dilution water medicament is saturated, need to set to dilution water
Change or reduce thickener flocculant additive amount.
Whether 1.6 inspection overflow water turbidities meet the requirements
The turbidity of overflow water can directly reflect flocculating effect quality, at the same can race to big well is muddy and mud bed operating not
Stablize and the indication phenomenon of early stage is provided.The inspection method of overflow water turbidity is two position samples to be overflow with turbidity to concentration overflow
Liquid carries out turbidity test, is less than the overflow water turbidity that 50ppm is qualification to meet, inspection cycle is 1 hour.
2, it controls
2.1 control thickener materials inside balances
Control the material balance inside thickener, it is preferred that emphasis is the control of thickener inlet amount and row's tail amount, so that concentration
Solids bulk amount inside machine maintains constant level always, to obtain stable mud bed, realizes the gradually compacting of ore pulp, is formed
High concentration.The adjustment of the feed surge of deep cone thickener essentially consists in the adjustment of underflow row's tail amount.It is permanent with thickener mud bed height
It is set to adjustment target, to adjust underflow pump frequency as measure, realizes thickener materials inside balance.For thickener feedback time
Long feature adjusts amplitude using 1Hz (590r/min) as underflow pump, adjusts interval using 0.5 hour as frequency, passes through measurement
The eustasy of mud bed height instructs underflow pump to adjust trend.
2.2 control concentrator rake revolving speeds
The harrow frame rotation of deep cone thickener is conducive to the export of tailing heap deposition bed internal water, and harrow frame rotation is be easy to cause slowly
High torque damages harrow frame；Harrow frame rotation then be easy to cause the rotation of whole mud bed fastly, is unfavorable for that mud bed is stable and water
Export.The harrow frame speed control of thickener is advisable in 10-20Hz, with thickener torque in 25-30% to control target, with
1Hz (0.135r/min) is that concentrator rake revolving speed adjusts amplitude, reaches best rotary rpm, realizes the promotion of underflow density.
2.3 control mud bed heights
The formation key of deep cone thickener high-concentration underflow is to be higher than other type thickeners in thickener building up inside
Ore pulp stack layer, by compacting, effective water guide is carried out, to realize high underflow density.Unsuitable too low, the low mud of the height of mud bed
Bed is not easy to realize the compacting of ore pulp layer, meanwhile, the height of mud bed should not be greater than the height of aqueduct inside thickener, be higher than water guide
The mud bed of pipe height will stop the export of mud bed internal water.Therefore, the height of mud bed should control in aqueduct height 12m hereinafter,
Mud bed height high as far as possible is pursued below this maximum height limit, by long-term practice it is concluded that (such as Fig. 1): mud bed height is stablized
Control in the position 11.5m be the best mud bed height position to form high underflow.
2.4 control medicament additions are stablized
Control medicament adds stable purpose and is to form the mud bed compactness of continuous-stable, so that depositing ore pulp inside mud bed
Sinking speed it is consistent, ore pulp particle floc sedimentation is in the same size, mud bed every aspect have uniform compacting factor, realize mine
Settlement stability is starched, realizes that underflow density is stablized and is promoted.It is learnt in practice (Fig. 2), suitable pharmaceutical quantities are added to 21g/t dry mine,
Dry mine amount is calculated according to the input concentration of thickener and feed rate, adds flow (such as following table) by adjusting flocculant, so that
The additive amount of flocculant maintains 21g/t dry mine always, to realize that stablizing for settling ore pulp layer is formed.
3, it adjusts
3.1 adjustment thickener input concentrations
Under the conditions of the best effect of settling of flocculant is embodied in thickener charging as 10% pulp density.Deep cone thickener
Feedwell has from dilution function, a certain amount of dilution water can be improved for feed slurry, to obtain optimal flocculating setting effect.
The feed rate of deep cone thickener can be controlled by the way that the frequency conversion of underflow pump is once concentrated, and meet conveyance conduit minimum flow rate
It is required that the frequency by the way that underflow pump is once concentrated adjusts, and change is delivered to secondary concentration deep cone thickener on the basis of 1180m/h
The flow of feed slurry, to change input concentration.By taking input concentration 40%-45% as an example, concentration can be improved when exceeding 45%
Primary concentration underflow pump frequency, concentration reduce primary concentration underflow pump frequency lower than 40%.
3.2 adjustment feeding pump rates of discharge
The adjustment of feeding pump rate of discharge not only can effectively control the mud bed height inside thickener, while according to discharge
The data streams amount such as pipe outlet pressure, concentration is adjusted, and discharge tube continuous and steady operation is realized, so that inside thickener
Ore pulp it is heavy by not because row's tail amount it is unstable caused by fluctuate.The concentration control that feeding pump arranges tail is better than flow control, but for a long time
Low discharge operation easily cause the deposition of ore pulp inside pipeline, flow-reduction caused by resistance increases, so that the frequency of feeding pump
It is forced to increase, is easy to the phenomenon for causing thickener row's tail amount suddenly big or suddenly small, is unfavorable for mud bed and stablizes, influence high concentration and formed.
During the adjustment of feeding pump rate of discharge, control pipe outlet pressure is advisable always in 500-550kpa, the row of can satisfy
The stabilization of tail and pipeline it is unimpeded, to adjust feeding pump frequency as method, adjustment amplitude is 1Hz (590r/min), adjusts the period
It is 0.5 hour.
3.3 adjusting flocculant chemical feeding points flow
The chemical feeding points of flocculant are distributed in four different positions of thickener feedwell top, are followed successively by from feedstock direction
1#, 2#, 3#, 4# chemical feeding points, each chemical feeding points are provided with valve and are adjusted to lower dose.The size of dose under different location
The flocculating effect of flocculant is directly affected, and then influences the height of turbidity screen, lower turbidity screen embodies preferable sedimentation effect
Fruit is more conducive to the formation of high-concentration underflow.The flocculation agent flux adjustment of different chemical feeding points can effectively reduce muddy layer height,
Adjustment flow can carry out by adjusting the valve opening of each chemical feeding points, and adjustment amplitude is 3 degree, and the adjustment period is 0.5 hour, adjust
It is 45 degree that primary condition is reseted when whole as valve opening, and 1#, 2# chemical feeding points are to increase valve opening adjustment, and aperture is 60 degree,
3#, 4# chemical feeding points are to reduce valve opening adjustment, and aperture is 30 degree.Finally adjusted within 1m with the control of muddy layer height
Target.
3.4 adjustment dilution water flows
In flocculant adding procedure, the addition of dilution water rational proportion plays key effect to flocculating effect.Dilute water
Reasonable addition the floc sedimentation of tailings particles is formed and the compacting of mud bed, and have positive work to good control of turbidity screen
With.The adjustment of the adjustment cooperation flocculant addition point flow of dilution water flow, is to realize low muddy layer height and good mud bed shape
At effective means.The adjustment of dilution water flow is adjusted by the frequency conversion of fresh water pump and is carried out, and flocculant is finally diluted to ten thousand
3/1 bis- to ten thousand additions are advisable, and dilution water must be adjusted simultaneously with the variation of flocculant additive amount, to guarantee
The flocculant concentration being added to inside thickener is constant.
3.5 adjustment flocculant matched proportion densities
In the concentration process of deep cone thickener, the matched proportion density of flocculant, which is adjusted to 1.9 ‰ -2.3 ‰, to be advisable, lower
Matched proportion density is not able to satisfy the sedimentation of ore pulp, and higher matched proportion density then influences the dissolution of flocculant, be easy to cause agglomeration, into
After entering thickener, undissolvable floc sedimentation is suspended in liquid level surface, influences normal flocculation.According to different types of medicine
Agent has different optimum proportioning concentration, generally should the adjustment (as described in Figure 3) in 1.9 ‰ -2.3 ‰ ranges.Method of adjustment
It for flocculant is carried out specific gravity test, is compared with given specific gravity values, obtains corresponding data, intervened from pharmaceutical equipment interface
The data dissolve situation according to flocculant in pharmacy procedure and matched proportion density are micro-adjusted, and adjustment amplitude is a ten thousandth, directly
It is met the requirements to configuration solution.
By practice, deep cone thickener underflow density maneuver is improved, effect is obvious, and effect is significant, considerable benefit.Not only
Tailing underflow discharge concentration can effectively be improved, foundation is provided for our operator's reasonable operations, while to explore tailing
It lays a solid foundation on the road of maximum discharge concentration.
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (10)
1. a kind of method for improving deep cone thickener underflow density, which comprises the steps of:
S1, inspection
Whether in safe range to check muddy layer height；Check whether big well liquid face rotates；Check whether flocculant has agglomeration
Phenomenon；Check whether flocculant add-on system has air entrance；Check whether dilution water water quality meets the requirements；Check that overflow water is turbid
Whether degree meets the requirements；
S2, control
Thickener materials inside is controlled to balance, control concentrator rake revolving speed, control mud bed height, control medicament addition stabilization；
S3, adjustment
Adjust thickener input concentration, adjustment feeding pump rate of discharge, adjustment flocculant concentration point flow, adjustment dilution water flow
Amount, adjustment flocculant matched proportion density.
2. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that whether turbid layer height
Inspection requirements in safe range is: turbidity screen is not more than 1m in operational process, and inspection cycle is 1 hour；Check big well liquid
When whether face rotates, observing time is not less than 10 minutes, confirms whether it rotation phenomenon occurs.
3. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that check that flocculant is
It is not no when having caking phenomenon, carry out within every 2 hours it is primary, inspection method be flocculant prepare case and storage bin sewage pipe give off it is few
The medicament prepared is measured, touches whether it agglomerates with feel, processing method is that will agglomerate medicament by sewage draining exit discharge, is reduced simultaneously
Medicament configuration concentration；The method whether flocculant add-on system has air to enter is checked to observe whether big well liquid face has bubble to emit
The water surface out, while flocculant transfer pipeline and ore pulp feeding pipe drain tap are checked, inspection cycle is 2 hours, if
It was found that have air enter should each pipeline of inspection immediately, valve, be sealed processing in time.
4. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that check dilution water water
When whether matter meets the requirements, the inspection cycle of dilution water water quality is 2 times/class, and inspection method is to be sampled to dilution water, is used
Transparent vessel carries out sedimentation experiment to quantitative ore pulp, if ore pulp can settle completely in 10 seconds, illustrates that dilution water medicament is saturated,
Thickener flocculant additive amount need to be replaced or reduced to dilution water；When checking whether overflow water turbidity meets the requirements, check
Method is to be overflow to carry out turbidity test to two position sample liquid of concentration overflow with turbidity, and being less than 50ppm with satisfaction is qualification
Overflow water turbidity, inspection cycle be 1 hour.
5. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that in control thickener
The material balance in portion is control thickener inlet amount and row's tail amount, so that the solids bulk amount inside thickener maintains perseverance always
Fixed level；Wherein the adjustment of the feed surge of deep cone thickener is the adjustment of underflow row's tail amount, constant with thickener mud bed height
To adjust target, to adjust underflow pump frequency as measure, thickener materials inside balance is realized.
6. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that control thickener rake
When frame revolving speed, the control of concentrator rake speed is in 10-20Hz, with thickener torque in 25-30% to control target, with
1Hz, 0.135r/min are that concentrator rake revolving speed adjusts amplitude.
7. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that control mud bed height
When mud bed height control below aqueduct height 12m；Control medicament adds stable control condition and is added to for pharmaceutical quantities
21g/t dry mine.
8. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that thickener charging is dense
The pulp density that degree is 10%；During the adjustment of feeding pump rate of discharge, pipe outlet pressure is controlled in 500- always
550kpa, to adjust feeding pump frequency as method, adjustment amplitude is 1Hz, 590r/min, and the adjustment period is 0.5 hour.
9. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that adjustment flocculant is thrown
It adds some points the mode of flow are as follows: the chemical feeding points of flocculant are distributed in four different positions of thickener feedwell top, from charging side
It to 1#, 2#, 3#, 4# chemical feeding points are followed successively by, is carried out by adjusting the valve opening of each chemical feeding points, adjustment amplitude is 3 degree, adjustment
Period is 0.5 hour, and it be valve opening is 45 degree that when adjustment, which resets primary condition, and 1#, 2# chemical feeding points are to increase valve opening
Adjustment, aperture are 60 degree, and 3#, 4# chemical feeding points are to reduce valve opening adjustment, and aperture is 30 degree.
10. the method according to claim 1 for improving deep cone thickener underflow density, which is characterized in that dilution water flow
Adjustment adjusted and carry out by the frequency conversion of fresh water pump, flocculant is finally diluted to 3/20000ths to ten thousand/10000ths；Flocculant
Matched proportion density is adjusted to 1.9 ‰ -2.3 ‰.
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Application publication date: 20190416 |