CN106944240A - The implementation method and device of a kind of thickening flotation technique of black water half - Google Patents
The implementation method and device of a kind of thickening flotation technique of black water half Download PDFInfo
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- CN106944240A CN106944240A CN201710091477.9A CN201710091477A CN106944240A CN 106944240 A CN106944240 A CN 106944240A CN 201710091477 A CN201710091477 A CN 201710091477A CN 106944240 A CN106944240 A CN 106944240A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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Abstract
The present invention relates to a kind of implementation method of thickening flotation technique of black water half and device.Implementation method includes：The part of moisture of coal fines three of coal preparation plant, respectively enters thickener, mixing cirtern and surge tank；The ore pulp that concentration is 90 ~ 120g/L is made in accurate adjustment to high-concentration ore slurry again with the first coarse adjustment of low concentration ore pulp；The pulp gravity flow prepared, which enters, enters back into flotation device progress flotation after the pre- mineralising of ore pulp preprocessor.Realize device include thickener, underflow pump, mixing cirtern, electric control valve, static pressure transducer, turn row's pump, surge tank, manual modulation valve, densimeter, flowmeter, ore pulp preprocessor, flotation device and to feedback signal processing and control intelligent controller, electric control valve, static pressure transducer and densimeter are connected by wired mode with intelligent controller.The proportioning that the present invention realizes 350 ~ 450g/L high-concentration ore slurries and ≯ 60g/L low concentration ore pulps is accurate, flexibly adjustable, it is ensured that enter ore pulp preprocessor to enter floating pulp density all the time in the concentration range in 90g/L ~ 120g/L and more stable.
Description
Technical field
The invention belongs to flotation technology field, and in particular to the implementation method and dress of a kind of thickening flotation technique of black water half
Put.
Background technology
Flotation technology is fine coal slime separation method the most cost-effective, is also the important method of coal depth sorting.
With the raising of mining mechanization degree, the coal amount in coal preparation plant's feed coal is more and more, and what flotation operation became increasingly weighs
Will.Moreover, flotation operation is also the important step in Coal Slurry in Preparation Plant processing system, to realizing closed water circuit and ring
Border protection plays an important roll.
What current most coal preparation plants of China used substantially is all direct flotation technique, but each coal preparation plant is drop in recent years
Low production cost, frequently with predictive desliming technique, when one of the problem of bringing is exactly direct flotation, slime water flow is low, flow
Greatly；In addition, increasingly strict, the Coal Preparation Plant benefit set coal slime required with country product quality environmental requirement and user
Floatation system is increasing, but Coal Preparation Plant smalls cleaning percent is relatively low, the mode of production flexible, and slime water flow is low（Greatly
Part factory is less than 40g/L）And fluctuate larger, cause to enter when mending set floatation system that floating ore pulp amount is big, slime water flow is low, equipment choosing
Type is big, and cost of investment is high；In production process, enter that floating concentration is low and fluctuation is frequent, process parameter control is difficult, and medicine consumption is high, product
Index is unstable, and production cost is high.
To ensure to have suitable, stable concentration into floating ore pulp, nearly 2 years thickening flotation technologies are again by the weight of industry
Depending on, but there are two big drawbacks in traditional thickening flotation：1st, based on the big discharge technology of underflow, floatation feed is done using thickener underflow,
Enter that floating concentration is higher, floatation process will add more supplement water, cause circulation water consumption increase；2nd, any medicament is not added with,
Thickener overflow thin mud content is high, and reciprocation cycle has a strong impact on effective sorting of each link such as gravity treatment, flotation.
For existing coal slime direct flotation or thickening flotation technique above shortcomings, there is provided a kind of half thickening flotation work
Skill, this technique will enter floating pulp density and be lifted by about 40g/L to 80 ~ 150g/L, improve more than 2 times, significantly increase coal grain
The probability contacted with floating agent, floating agent consumption reduces by more than 50；Enter floating pulp volume be reduced to concentration before enter it is floating
1/3 or so of volume, lectotype selection is small when mending set floatation system or number of units is few, and cost of investment can reduce by more than 50；In addition lead to
Crossing quantitatively addition flocculant makes thickener overflow close to clear water, is directly used as recirculated water, efficiently solves traditional thickening flotation
Technique thickener overflow thin mud content is high, reciprocation cycle, the unfavorable effect caused to gravity treatment, flotation link.
By automation means, make process automation of sizing mixing into floating ore pulp, intellectuality, the floating pulp density that enters being made into is closed
It is suitable, stably, to realizing the thickening flotation technique of black water half, it is ensured that floating product qualified, reduction reagent consumption amount are to closing weight
Will.
The content of the invention
The technical problem to be solved in the present invention is the implementation method and dress for providing a kind of thickening flotation technique of black water half
Put, such an approach achieves high-concentration ore slurry（Thickener underflow）With low concentration ore pulp（Classifying cyclone overflow）Mixing size mixing
Process；This device makes what is be made into enter floating pulp density properly, stably, process automation of sizing mixing, intellectuality.
The present invention is for the technical scheme that is used of solution above-mentioned technical problem.
A kind of implementation method of the thickening flotation technique of black water half, it is characterised in that mainly comprise the following steps：
S1, the black water of coal preparation plant（Classifying cyclone overflow）It is divided into three parts, part gravity flow enters thickener, and a part is certainly
Stream enters mixing cirtern, and remainder gravity flow enters surge tank, and proportions are flexibly adjustable；
High-concentration ore slurry after S2, the concentration of concentrated machine（Thickener underflow, 350 ~ 450g/L）Mixing cirtern is pumped into by underflow
The interior low concentration ore pulp entered with gravity flow in mixing cirtern（≯60g/L）It is uniform through impeller strong stirring, complete into the thick of floating ore pulp
Tune process；
Ore pulp after S3, mixing cirtern coarse adjustment is pumped into surge tank by turning row, the low concentration ore deposit entered with flowing automatically in surge tank
Slurry（≯60g/L）It is well mixed that the ore pulp that concentration is 90 ~ 120g/l is made, complete the accurate adjustment process into floating ore pulp；
S4, the pulp gravity flow prepared, which enter ore pulp preprocessor, flow automatically again after the pre- mineralising of ore pulp into the interior progress of flotation device
Flotation.
Device is realized the invention further relates to a kind of thickening flotation technique of black water half, is at least included：
Thickener, the first electric control valve, the second electric control valve, underflow pump, mixing cirtern, the first static pressure transducer, turn row's pump,
Surge tank, the second static pressure transducer, the 5th manual modulation valve, densimeter, ore pulp preprocessor, flotation device and to feedback signal at
Reason and the intelligent controller of control.Thickener is by underflow pump and pipeline communication to mixing cirtern, and mixing cirtern sets two pan feeding ore pulps
On pipe gravity flow pipeline, the first electric control valve pipeline installed therein, the first static pressure transducer is arranged on barrel side wall of sizing mixing, use
Liquid level in detection mixing cirtern, mixing cirtern is by turning row's pump and pipeline communication to surge tank, and the second electric control valve is arranged on
On the pan feeding pulp gravity flow pipeline of surge tank, the second static pressure transducer is arranged on groove sidewall of sizing mixing, for detecting in surge tank
Liquid level, ore pulp preprocessor is arranged in the downstream of surge tank, is connected with surge tank by two pipe gravity flow pipelines, wherein a pipe
5th manual modulation valve and densimeter are installed, flotation device is arranged in the downstream of ore pulp preprocessor, with ore pulp preprocessor on road
Pass through pipeline communication.Electric control valve, static pressure transducer and densimeter are connected by wired mode with intelligent controller.
The thickening flotation technique of black water half realize device using intelligent controller as control core, it includes electricity
Source module, CPU module, digital quantity input/output module, analog input/output module and communication module.Using
Programmable memory, for its internally stored program, execution logic computing, sequential control, timing, counting and arithmetical operation etc.
Function.
Power module, for providing power supply for intelligent controller.
CPU module, for during the use of described device, collection digital quantity to be inputted and analog input
The live signal of module, is converted to sample parameter and enters line program calculating analysis.
Digital quantity or analog input/output module, for during the use of described device, collection first to be quiet in real time
Pressure sensor and the liquid level signal of the second static pressure transducer detection, the signal of reception is automatically analyzed by CPU module
The valve opening setting value for obtaining the first electric control valve and the second electric control valve is calculated, and is converted to analog signalses control
The aperture of first electric control valve and the second electric control valve；The concentration signal that collection densimeter is detected in real time, by the letter of reception
Number automatically analyzing calculating by CPU module obtains underflow pump frequency setting value, and is converted to analog signalses control bottom
Flow the frequency of pump.
Communication module, for during the use of described device, realizing remote monitoring.
Realized and communicated by core bus connected mode between described each module.
By such scheme, intelligent controller is used for the concentration signal for receiving densimeter detection automatically, and by concentration signal with
Concentration set point domain（Certain codomain in 90 ~ 120g/L is interval）It is compared, is performed according to comparative result by following three kinds of situations：
A, when detection concentration signal be higher than concentration set point Δ max when, the concentration signal of reception is passed through into central processing unit mould
Block automatically analyzes the setting value for calculating and obtaining underflow pump frequency, and is converted to analog signalses reduction underflow pump frequency；
B, when the concentration signal of detection is in the range of concentration set point Δ max ~ Δ min, by the concentration signal of reception in
Central processor module is automatically analyzed after calculating, nil amount output valve；
C, when detection concentration signal be less than in concentration set point Δ min when, the concentration signal of reception is passed through into central processing unit
Module automatically analyzes the setting value for calculating and obtaining underflow pump frequency, and is converted to analog signalses increase underflow pump frequency.
By such scheme, intelligent controller is used for the liquid level signal for receiving static pressure transducer automatically, and by liquid level signal with
Level set codomain is compared, and is performed according to comparative result by following three kinds of situations：
A, when detection liquid level signal be higher than level set value Δ max when, the liquid level signal of reception is passed through into central processing unit mould
Block automatically analyzes the aperture setting value for calculating and obtaining electric control valve, and is converted to opening for analog signalses reduction electric control valve
Degree；
B, when the liquid level signal of detection is in the range of level set value Δ max ~ Δ min, by the liquid level signal of reception in
Central processor module is automatically analyzed after calculating, nil amount output valve；
C, when detection liquid level signal be less than level set value Δ min when, the liquid level signal of reception is passed through into central processing unit mould
Block automatically analyzes the aperture setting value for calculating and obtaining electric control valve, and is converted to opening for analog signalses increase electric control valve
Degree.
It is preferred that, also adjusted manually including first manual regulating valve, the second manual modulation valve, the 3rd manual modulation valve and the 4th
Save valve, be separately mounted on another pan feeding pipe gravity flow pipeline of mixing cirtern, on the connecting pipe of underflow pump discharge and mixing cirtern, turn
Arrange on the connecting pipe of pump discharge and surge tank and surge tank with another pipe gravity flow pipeline of ore pulp preprocessor, adjusting manually
The aperture of valve is manually controlled, continuously adjustabe, makes flow rate of pulp and pipe characteristic all the time in relatively rational more interval.
It is preferred that, also including flowmeter, in the downstream line of densimeter, for entering ore pulp pretreatment to gravity flow
The floating ore pulp amount that enters of device is detected in real time.
The present invention brings following beneficial effect：
In high-concentration ore slurry（Thickener underflow）With low concentration ore pulp（Classifying cyclone overflow）Mixing size mixing during, pass through
The online real-time regulation of underflow pump frequency and motorized adjustment valve opening, realizes 350 ~ 450g/L high-concentration ore slurries and ≯ 60g/L
The proportioning of low concentration ore pulp is accurate, flexibly adjustable, it is ensured that the floating pulp density that enters for entering ore pulp preprocessor is in 90g/L all the time
It is in ~ 120g/L concentration range and more stable, it has been effectively ensured the stability of floating ore pulp, has advantageously ensured that point of flotation device
Technic index is selected, the type selecting of flotation device is small in addition or number of units is few, flotation medicine consumption reduces by more than 50 so that the cost of investment of flotation
And processing cost is greatly reduced.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
In figure：1- classifying cyclones, 2- thickeners, the electric control valves of 3- first, 4- first manuals regulating valve, the electricity of 5- second
Dynamic regulating valve, 6- mixing cirterns, 7- underflow pumps, the manual modulation valves of 8- second, the static pressure transducers of 9- first, 10- turn row's pump, 11- the
Three manual modulation valves, 12- surge tanks, the static pressure transducers of 13- second, the manual modulation valves of 14- the 4th, the 15, the 5th manual modulation valve,
16- densimeters, 17- flowmeters, 18- ore pulps preprocessor, 19- flotation devices, 20- intelligent controllers.
Embodiment
1 the present invention will be further described below in conjunction with the accompanying drawings, but they are not the limit to the scope of the present invention
It is fixed.
As shown in figure 1, the device for realizing the thickening flotation technique of black water half in the present embodiment, including thickener（2）,
One electric control valve（3）, first manual regulating valve（4）, the second electric control valve（5）, mixing cirtern（6）, underflow pump（7）, second
Manual modulation valve（8）, the first static pressure transducer（9）, turn row's pump（10）, the 3rd manual modulation valve（11）, surge tank（12）, second
Static pressure transducer（13）, the 4th manual modulation valve（14）, the 5th manual modulation valve（15）, densimeter（16）, flowmeter（17）, ore deposit
Starch preprocessor（18）, flotation device（19）, intelligent controller（20）.
The operation principle and the course of work of the device for realizing the thickening flotation technique of black water half are as follows：
The overflow of classifying cyclone 1 is divided into three parts, and a part enters thickener 2 by a pipeline self, and a part is by two pipes
Road gravity flow enters in mixing cirtern 2, and two pipelines one thick one are thin, and the first electric control valve 3 is arranged on tubule, first manual regulation
Valve 4 is arranged on extra heavy pipe, and remainder is entered in surge tank by a pipeline self, and installs on pipeline the second motorized adjustment
Valve 5；About 400g/L high-concentration ore slurry is delivered in mixing cirtern 6 by underflow pump 7 after the concentrated concentration of machine 2, is entered with gravity flow
About 40g/L low concentrations ore pulp through impeller strong stirring it is uniform after complete coarse tuning process；The side wall of mixing cirtern 6 installs the first static pressure sensing
Device 9, the digital quantity or Analog input mModule of intelligent controller 20 gather the liquid level signal of the first static pressure transducer 9 in real time, will
The signal of reception is automatically analyzed by CPU module calculates the aperture setting value for obtaining the first electric control valve 3, and turns
It is changed to the aperture that analog signalses control the first electric control valve 3 in real time；The floating ore pulp that enters after coarse adjustment is delivered to by turning row's pump 10
In surge tank 12, the about 40g/L low concentration ore pulps entered with gravity flow are well mixed the ore pulp for being made that concentration is 90 ~ 120g/l, complete
Into the accurate adjustment process for entering floating ore pulp；The side wall of surge tank 12 installs the second static pressure transducer 13, the digital quantity of intelligent controller 20 or
Analog input mModule gathers the liquid level signal of the second static pressure transducer 13 in real time, and the signal of reception is passed through into central processing unit mould
Block automatically analyzes the aperture setting value for calculating and obtaining the second electric control valve 5, and is converted to analog signalses control second in real time
The aperture of electric control valve 5；Enter ore pulp preprocessor 18 of the floating ore pulp by two pipeline selfs to surge tank downstream after accurate adjustment,
Two pipeline one thick one is thin, and the 5th manual modulation valve 15, densimeter 16 and flowmeter 17 are arranged on tubule, the 4th regulation manually
Valve 14 is arranged on extra heavy pipe；Intelligent controller 20 receives the concentration signal of densimeter 16 automatically, and the signal of reception is passed through into center
Processor module automatically analyzes the frequency setting value for calculating and obtaining underflow pump 7, and is converted to analog signalses control underflow pump 7
Frequency；Enter floating ore pulp and enter the sorting into flotation device 19 of flowing automatically again after the progress pre- mineralisings of ore pulp of ore pulp pretreatment 18, sub-elect
Concentrate and tailings.
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned technical side
Case is changed and changed.But, the invention is not limited in above-mentioned concrete technical scheme, every those skilled in the art exist
Made any conspicuously improved, replacement or modification belong to protection scope of the present invention on the basis of the present invention.This
Outside, although having used some specific terms in this specification, these terms merely for convenience of description, not to the present invention
Constitute any limitation.
Claims (7)
1. a kind of implementation method of the thickening flotation technique of black water half, it is characterised in that mainly comprise the following steps：
S1, the black water of coal preparation plant, part gravity flow enter thickener, and part gravity flow enters mixing cirtern, remainder gravity flow
Into surge tank, proportions are flexibly adjustable；
High-concentration ore slurry after S2, the concentration of concentrated machine is pumped into mixing cirtern by underflow enters low in mixing cirtern with flowing automatically
Concentration ore pulp is uniform through impeller strong stirring, completes the coarse tuning process into floating ore pulp；
Ore pulp after S3, mixing cirtern coarse adjustment is pumped into surge tank by turning row, the low concentration ore deposit entered with flowing automatically in surge tank
Slurry is well mixed to be made the ore pulp that concentration is 90 ~ 120g/l, completes the accurate adjustment process into floating ore pulp；
S4, the pulp gravity flow prepared, which enter ore pulp preprocessor, flow automatically again after the pre- mineralising of ore pulp into the interior progress of flotation device
Flotation.
2. a kind of implementation method of the thickening flotation technique of black water half, it is characterised in that the concentration of step S2 middle and high concentration ore pulps
For 350 ~ 450g/L, the concentration of the low concentration ore pulp in step S2 and S3 is not more than 60g/L, through coarse adjustment and accurate adjustment process, is made
Concentration enters floating ore pulp for 90 ~ 120g/L's.
3. one kind applied to claim 1 ~ 2 it is one of any described in the thickening flotation technique of black water half realize device, it is special
Levy and be, this realize device at least include thickener, the first electric control valve, the second electric control valve, underflow pump, mixing cirtern,
First static pressure transducer, turn row's pump, surge tank, the second static pressure transducer, the 5th manual modulation valve, densimeter, ore pulp pretreatment
Device, flotation device and the intelligent controller to feedback signal processing and control；Thickener is by underflow pump and pipeline communication to sizing mixing
Bucket, mixing cirtern is set on two pan feeding pulp gravity flow pipelines, the first electric control valve pipeline installed therein, and the first static pressure is passed
Sensor is arranged on and sized mixing barrel side wall, for detecting the liquid level in mixing cirtern, and mixing cirtern is by turning row's pump and pipeline communication to sizing mixing
Groove, the second electric control valve is arranged on the pan feeding pulp gravity flow pipeline of surge tank, and the second static pressure transducer is arranged on surge tank
Side wall, for detecting the liquid level in surge tank, ore pulp preprocessor is arranged in the downstream of surge tank, with surge tank by two from
Pipeline communication is flowed, the 5th manual modulation valve and densimeter are installed on one article of pipeline wherein, flotation device is arranged in ore pulp pretreatment
The downstream of device, pipeline communication is passed through with ore pulp preprocessor；Electric control valve, static pressure transducer and densimeter pass through wired side
Formula is connected with intelligent controller.
4. the thickening flotation technique of black water half according to claim 3 realizes device, it is characterised in that intelligent controller
Concentration signal for receiving densimeter detection automatically, and concentration signal is compared with concentration set point, according to comparing knot
Fruit is performed by following three kinds of situations：
A, when detection concentration signal be higher than concentration set point Δ max when, the concentration signal of reception is passed through into central processing unit mould
Block automatically analyzes the setting value for calculating and obtaining underflow pump frequency, and is converted to analog signalses reduction underflow pump frequency；
B, when the concentration signal of detection is in the range of concentration set point Δ max ~ Δ min, by the concentration signal of reception in
Central processor module is automatically analyzed after calculating, nil amount output valve；
C, when detection concentration signal be less than in concentration set point Δ min when, the concentration signal of reception is passed through into central processing unit
Module automatically analyzes the setting value for calculating and obtaining underflow pump frequency, and is converted to analog signalses increase underflow pump frequency.
5. the thickening flotation technique of black water half according to claim 3 realizes device, it is characterised in that intelligent controller
Liquid level signal for receiving static pressure transducer automatically, and liquid level signal is compared with level set value, according to comparing knot
Fruit is performed by following three kinds of situations：
A, when detection liquid level signal be higher than level set value Δ max when, the liquid level signal of reception is passed through into central processing unit mould
Block automatically analyzes the aperture setting value for calculating and obtaining electric control valve, and is converted to opening for analog signalses reduction electric control valve
Degree；
B, when the liquid level signal of detection is in the range of level set value Δ max ~ Δ min, by the liquid level signal of reception in
Central processor module is automatically analyzed after calculating, nil amount output valve；
C, when detection liquid level signal be less than level set value Δ min when, the liquid level signal of reception is passed through into central processing unit mould
Block automatically analyzes the aperture setting value for calculating and obtaining electric control valve, and is converted to opening for analog signalses increase electric control valve
Degree.
6. the thickening flotation technique of black water half according to claim 3 realizes device, it is characterised in that also including first
Manual modulation valve, the second manual modulation valve, the 3rd manual modulation valve and the 4th manual modulation valve, are separately mounted to the another of mixing cirtern
On one pan feeding pipe gravity flow pipeline, on the connecting pipe of underflow pump discharge and mixing cirtern, turn communicating pipe of row's pump discharge and surge tank
On road and on another pipe gravity flow pipeline of surge tank and ore pulp preprocessor, the aperture of manual modulation valve is manually controlled, continuously may be used
Adjust.
7. the thickening flotation technique of black water half according to claim 3 realizes device, it is characterised in that also including flow
Meter, in the downstream line of densimeter.
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| CN201710091477.9A CN106944240A (en) | 2017-02-21 | 2017-02-21 | The implementation method and device of a kind of thickening flotation technique of black water half |
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