CN103759835B - The system and method for full-automatic seriality non-cpntact measurement liquidus temperature of aluminium electrolyte - Google Patents
The system and method for full-automatic seriality non-cpntact measurement liquidus temperature of aluminium electrolyte Download PDFInfo
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- CN103759835B CN103759835B CN201410039720.9A CN201410039720A CN103759835B CN 103759835 B CN103759835 B CN 103759835B CN 201410039720 A CN201410039720 A CN 201410039720A CN 103759835 B CN103759835 B CN 103759835B
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Abstract
The invention discloses the system and method for a kind of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte, described system includes several measuring units and the non-contact temperature sensor of the aluminium electrolyte sample temperature in the heating furnace measuring measuring unit, and for controlling the temperature control subsystem of the heating in-furnace temperature in measuring unit, for controlling the motion control subsystem of measuring unit drive mechanism and for the data acquisition process subsystem of temperature data acquisition and process.This system is applicable to the liquidus temperature of aluminium electrolyte of various composition and measures, highly sensitive, anti-interference, realize the ms level response measurement of real-time change temperature, reduce the delay error of thermocouple measurement in transformation temperature, avoid the wasteness that thermocouple is changed as consumptive material simultaneously.
Description
Technical field
The present invention relates to electrolyte smelting technique, particularly relate to a kind of full-automatic seriality non-contact measurement aluminum electricity
Solve the system and method for matter liquidus temperature.
Background technology
Aluminium electrolyte electrolysis temperature and liquidus temperature are technological parameters important in aluminum electrolysis.Electrolysis temperature is with just
Differential thermal (degree of superheat) between brilliant temperature has very close relationship with the electrolysis bath thermal balance of electrolytic process.If energy
Enough liquidus temperatures accurately obtaining each electrolysis bath, just energy accurate assurance electrolysis temperature, the power consumption to each electrolysis bath
Amount just energy fixing quantity, has very great help to energy-saving and cost-reducing.The most domestic have manufacturer production to measure electrolyte primary crystal temperature
The equipment of degree, its equipment principle is to use natural cooling curve method, but uses Temperature fall when existing equipment is measured,
Rate of temperature fall is uncontrollable, the most inevitably causes the segregation of electrolyte and the generation of surfusion, and by
In the hysteresis quality etc. of thermocouple temperature measurement, cause measurement result inaccurate；The high temperature of aluminium electrolyte and severe corrosive simultaneously,
Make temperature thermocouple easily damage, need often to change thermocouple, and an electrolyte sample can only be measured every time,
The dismounting of measurement equipment is the most cumbersome, adds production cost, system maintenance, inefficient.
Summary of the invention
It is an object of the invention to, it is provided that a kind of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte
System, this system is applicable to the liquidus temperature of aluminium electrolyte of various composition and measures, highly sensitive, anti-interference, realization reality
Time transformation temperature ms level response measurement, reduce the delay error of thermocouple measurement in transformation temperature, avoid simultaneously
The wasteness that thermocouple is changed as consumptive material.
For reaching above-mentioned purpose, present invention employs following technical scheme:
The system of a kind of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte, described system includes some
Individual measuring unit, arbitrary measuring unit has the heating furnace 5 of cavity 10 in including, arrange at heating furnace 5 head hub
The aperture 11 communicated with cavity 10, arranges the bracket 7 that can put into cavity 10, described bracket 7 below heating furnace 5
Bottom arranges sealing ring 12, closes cavity 10 when cavity 10 put into by bracket 7, and described bracket 7 is arranged on height
On degree actuator 8, described height adjuster 8 is worked in coordination with by the first drive mechanism 2 being connected and the second drive mechanism 4
Driving carries out altitude mixture control and rotation；
Described arbitrary measuring unit also includes that the 3rd drive mechanism 6, described 3rd drive mechanism 6 drive feeding swing arm 9,
The crucible 3 being placed on feeding swing arm 9 tache motorice is placed on bracket 7, so that crucible enters cavity 10 and carries out
Heating；
Described system also includes that at least one non-contact temperature sensor 1, described non-contact temperature sensor 1 set
Put above aperture 11, for measuring the temperature of aluminium electrolyte sample in crucible 3；
Described system also includes temperature control subsystem 14, motion control subsystem and data acquisition process subsystem, described
Temperature in temperature control subsystem controls cavity 10, described motion control subsystem for control drive mechanism transmission and
The movement of non-contact temperature sensor 1, described data acquisition subsystem is used for electrolyte temperature data acquisition and place
Reason.
Preferably, the number of described measuring unit is six, and the number of described non-contact temperature sensor 1 is two
Individual, those skilled in the art can select the number of measuring unit and non-contact temperature sensor as required.
Preferably, described non-contact temperature sensor 1 is infrared temperature instrument, and those skilled in the art can basis
Need to select the kind of other non-contact temperature sensors.
Preferably, it is provided with heat-preservation liner 13 in described cavity 10.
Preferably, described heating furnace 5, non-contact temperature sensor 1 and bracket 7 are coaxially disposed.
Preferably, any one in described first drive mechanism the 2, second drive mechanism 4 and the 3rd drive mechanism 6 passes
Dynamic structure is linear motion and the rotational motion mechanism of pneumatic system driving, or motor-driven ball-screw straight line fortune
Move and rotational motion mechanism.
Preferably, described crucible 3 is stainless steel crucible or graphite crucible, but is not limited to this.
Each parts of present system are fixed in frame.
A kind of method that present invention also offers full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte, institute
The method of stating comprises the following steps:
1), during system starts, during a measuring unit job, aluminium electrolyte sample is placed in crucible 3, crucible
3 are placed on feeding swing arm 9 station, after by motion control subsystem, pressing " startup " button, and feeding swing arm 9
Being rotated by the 3rd drive mechanism 6 by " waiting feeding position " or moved to " feeding position ", bracket 7 is by the second transmission
Structure 4 holds crucible 3 after rising to " feeding position ", feeding swing arm 9 returns to " wait feeding position ", and following the
" the measurement position " that bracket 7 and crucible 3 are together sent in the cavity 10 of heating furnace 5 by one drive mechanism 2, " surveys
Amount position " can by height adjuster 8 bracket 7 thus be finely adjusted, the sealing ring 12 bottom bracket 7 is by sky
Chamber 10 seals formation and closes；
2) after crucible 3 enters heating furnace 5, heating furnace 5 is controlled to start to warm up by temperature control subsystem 14, will electrolysis
Quality sample is heated to electrolyte melt temperature, constant temperature, then at the uniform velocity cools to standby temperature with 5-10 DEG C/min,
During electrolyte reaches melt temperature and cools to standby temperature, non-contact temperature sensor 1 monitoring electrolysis
The change of matter temperature, and set up Temperature-time relation curve, data acquisition process by data acquisition process subsystem
Subsystem identifies and Detection curve flex point automatically, and at knee of curve, temperature is liquidus temperature of aluminium electrolyte；
3), after one-shot measurement completes, crucible 3 is sent to discharging position by bracket 7, and feeding swing arm 9 realizes crucible 3
Automatic discharging, furnace temperature maintains standby temperature, prepares to measure next time；
4) during the work of multiple measuring units, by the logic control instruction of motion control subsystem, when one is measured single
When unit completes primary crystal temperature measurement, in another measuring unit, crucible 3 electrolyte has just melted, contactless
Temperature sensor 1 is automatically transmitted to this another measuring unit and starts to measure, other measuring unit the like,
Thus realize measuring uninterruptedly going on continuously of work.
Preferably, step 2) in temperature-rise period use PID control heating-up temperature method realize.
Preferably, described electrolyte selects the aluminium electrolyte of CR=2.72, and described electrolyte melt temperature is 980 DEG C,
Described standby temperature is 880 DEG C, and described liquidus temperature is 954.7 DEG C.
The present invention is applicable to the liquidus temperature of aluminium electrolyte of various composition and measures, and is also applied in addition to aluminium electrolyte
The measurement of the liquidus temperature of other electrolyte.The present invention uses non-contact temperature sensor, highly sensitive, anti-interference,
Realize the ms level response measurement of real-time change temperature, reduce the delay error of thermocouple measurement in transformation temperature, with
Time avoid the wasteness that thermocouple is changed as consumptive material.
The present invention at the uniform velocity reduces temperature according to given pace, makes decrease temperature crystalline process temperature whole process controlled, it is to avoid mistake
Fast cooling causes the segregation of electrolyte and the generation of surfusion.Whole measurement process is all automatically obtained, it is to avoid people
Member operates the operational error and potential safety hazard brought, and improves and measures efficiency.One-shot measurement can be rapidly performed by after completing
Double measurement, time-consuming.
It is accurate that the system of the present invention has measurement result, simple in construction, and Repeatability and Reproducibility is stable, it is simple to operation,
Thus the even running of aluminum electrolysis is effectively ensured, play its electric energy efficiency to greatest extent, be finally reached into one
Step promotes management level and the technological progress of aluminum electrolysis, and can improve aluminium electroloysis work for improving aluminium electroloysis efficiency
Skill is significant.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of present system；
Fig. 2 is the structural representation of measuring unit in present system；
Fig. 3 is the working state schematic representation of measuring unit in present system；
Fig. 4 is the temperature-time curve of embodiment 2；
Reference: 1, non-contact temperature sensor；2, the first drive mechanism；3, crucible；4, second pass
Dynamic structure；5, heating furnace；6, the 3rd drive mechanism；7, bracket；8, height adjuster；9, feeding swing arm；
10, cavity；11, aperture；12, sealing ring；13, heat-preservation liner；14, temperature control subsystem；15, list is measured
Unit.
Detailed description of the invention
With specific embodiment, the present invention is introduced further below in conjunction with the accompanying drawings, but not as the limit to the present invention
Fixed.
Embodiment 1
As it is shown in figure 1, the system of a kind of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte, described
System includes six measuring units 15, and as shown in Figures 2 and 3, arbitrary measuring unit 15 has cavity 10 in including
Heating furnace 5, the aperture 11 that communicates with cavity 10 is set at heating furnace 5 head hub, setting below heating furnace 5
The bracket 7 of cavity 10 can be put into, bottom described bracket 7, sealing ring 12 is set, puts into cavity 10 for bracket 7
Time close cavity 10, described bracket 7 is arranged on height adjuster 8, and described height adjuster 8 is by the be connected
One drive mechanism 2 and the second drive mechanism 4 coordinated drive carry out altitude mixture control and rotation；
Described arbitrary measuring unit also includes that the 3rd drive mechanism 6, described 3rd drive mechanism 6 drive feeding swing arm 9,
The crucible 3 being placed on feeding swing arm 9 tache motorice is placed on bracket 7, so that crucible enters cavity 10 and carries out
Heating；
Described system also includes that two non-contact temperature sensors 1, described non-contact temperature sensor 1 are arranged on
Above aperture 11, for measuring the temperature of aluminium electrolyte sample in crucible 3；
Described system also includes temperature control subsystem 14, motion control subsystem and data acquisition process subsystem, described
Temperature in temperature control subsystem controls cavity 10, described motion control subsystem for control drive mechanism transmission and
The movement of non-contact temperature sensor 1, described data acquisition subsystem is used for electrolyte temperature data acquisition and place
Reason.
Described non-contact temperature sensor 1 is infrared temperature instrument.
It is provided with heat-preservation liner 13 in described cavity 10.
Described heating furnace 5, non-contact temperature sensor 1 and bracket 7 are coaxially disposed.
Any one drive mechanism in described first drive mechanism the 2, second drive mechanism 4 and the 3rd drive mechanism 6 is
The linear motion of pneumatic system driving or rotational motion mechanism.
Described crucible 3 is stainless steel crucible or graphite crucible.
In the present embodiment, drive mechanism is connected the instruction campaign according to control unit with motion control subsystem；Described
Each measuring unit forms one with temperature control subsystem, motion control subsystem, data acquisition process subsystem collaborative work
Set holonomic system.
Each measuring unit of the present invention is fixed on support.
Embodiment 2
A kind of method of full-automatic seriality non-contact measurement electrolyte primary crystal temperature, described method includes following step
Rapid:
1), during system starts, during a measuring unit job, the aluminium electrolyte sample of CR=2.72 is placed in crucible
In 3, crucible 3 is placed on feeding swing arm 9 station, after by motion control subsystem, pressing " startup " button,
Feeding swing arm 9 is rotated by the 3rd drive mechanism 6 by " waiting feeding position " or is moved to " feeding position ", bracket 7
Holding crucible 3 after being risen to " feeding position " by the second drive mechanism 4, feeding swing arm 9 returns to " waiting feeding position ",
What bracket 7 and crucible 3 were together sent in the cavity 10 of heating furnace 5 by following first drive mechanism 2 " measures
Position ", " measurement position " can be passed through height adjuster 8 bracket 7 thus be finely adjusted, the sealing bottom bracket 7
Cavity 10 is sealed formation and closes by circle 12；
2), after crucible 3 enters heating furnace 5, heating furnace 5 is controlled to heat up by PID, and electrolyte sample is heated to 980 DEG C,
Constant temperature, then at the uniform velocity cools to 880 DEG C with 5-10 DEG C/min, reaches 980 DEG C at electrolyte and cool to 880 DEG C
During, infrared temperature instrument monitoring electrolyte temperature change, and by data acquisition process subsystem set up temperature-
Time curve, as shown in Figure 4, data acquisition process subsystem identifies and Detection curve flex point, curve automatically
At flex point, temperature is electrolyte primary crystal temperature, curve show that the electrolysis temperature of electrolyte is 972.6 DEG C, primary crystal temperature
Degree is 954.64 DEG C；
3), after one-shot measurement completes, crucible 3 is sent to discharging position by bracket 7, and feeding swing arm 9 realizes crucible 3
Automatic discharging, furnace temperature maintains 880 DEG C, prepares to measure next time；
4) during the work of multiple measuring units, by the logic control instruction of motion control subsystem, when one is measured single
When unit completes primary crystal temperature measurement, in another measuring unit, crucible 3 electrolyte has just melted, infrared temperature
Instrument is automatically transmitted to this another measuring unit to start to measure, other measuring unit the like, thus realize surveying
Uninterruptedly going on continuously of amount work.
Measurement error≤1% of the infrared temperature instrument used in the embodiment of the present invention.
Using the result that differential thermal analysis obtains, liquidus temperature is 955.3 DEG C simultaneously.
Using the result that conventional thermocouple thermometric cooling curve method records, liquidus temperature is 954.0 DEG C simultaneously.
The result approximation that measurement result and other experimental techniques obtain, measurement error is at non-contact temperature sensor
In range of error.
Embodiment 3
Use system and the method for embodiment 2 of embodiment 1, choose different samples, use single-measurement unit
Being measured, electrolyte sample is made up of sodium fluoride, aluminium fluoride, calcium fluoride and aluminium oxide, and calcium fluoride accounts for electrolyte
The 5% of gross weight, aluminium oxide accounts for the gross weight 5% of electrolyte, and for sodium fluoride and aluminium fluoride, (molecular proportion is for remaining
2.4:1), sample weighting amount is 20g.
Recording electrolyte primary crystal temperature is 951.4 DEG C, and the result simultaneously using thermocouple temperature measurement cooling curve method to obtain is
950.6℃。
The result approximation that measurement result and traditional experiment technology obtain, measurement error is at non-contact temperature sensor
In range of error.
Embodiment 4
Using system and the method for embodiment 2 of embodiment 1, randomly select aluminium electrolyte sample, difference is:
Measuring 6 times altogether, and be to measure in a measuring unit, the electrolyte quality every time weighed is different,
It is respectively 10g totally 2 times, 20g totally 2 times, 30g totally 2 times.Record electrolyte primary crystal temperature results as shown in table 1:
The measurement result of table 1 same measuring unit same sample Different Weight
The repeatability of the system measurement data of the present invention is very well as can be seen from Table 1, and traditional thermocouple measurement is subject to
Very big to the impact of human users's mode, such as thermocouple probe inserts the degree of depth etc. of electrolyte every time.
Embodiment 5
Using system and the method for embodiment 2 of embodiment 1, randomly select aluminium electrolyte sample, difference is:
Measure in each measuring unit simultaneously, weigh identical electrolyte 10g.Record electrolyte primary crystal temperature knot
Fruit is as shown in table 2:
The measurement result of table 2 different measuring unit same sample identical weight
Measurement data result the most of the present invention has the concordance of height, illustrates this system and method
Repeatability is the most reliable.
Claims (10)
1. the system of a full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte, it is characterised in that institute
The system of stating includes several measuring units, and arbitrary measuring unit has the heating furnace (5) of cavity (10) in including, add
Arranging the aperture (11) communicated with cavity (10) at hot stove (5) head hub, heating furnace (5) lower section is arranged can
Putting into the bracket (7) of cavity (10), described bracket (7) bottom arranges sealing ring (12), for bracket (7)
Closing cavity (10) when putting into cavity (10), described bracket (7) is arranged on height adjuster (8), described
Height adjuster (8) is carried out height by the first drive mechanism (2) being connected and the second drive mechanism (4) coordinated drive
Degree regulation and rotation；
Described arbitrary measuring unit also includes that the 3rd drive mechanism (6), described 3rd drive mechanism (6) drive feeding
Swing arm (9), is placed on the crucible (3) being placed on feeding swing arm (9) tache motorice on bracket (7), so that
Crucible enters cavity (10) and heats；
Described system also includes at least one non-contact temperature sensor (1), described non-contact temperature sensor
(1) it is arranged on aperture (11) top, is used for measuring the temperature of aluminium electrolyte sample in crucible (3)；
Described system also includes temperature control subsystem (14), motion control subsystem and data acquisition process subsystem, institute
Stating the temperature in temperature control subsystem controls cavity (10), described motion control subsystem is for controlling drive mechanism
Transmission and the movement of non-contact temperature sensor (1), described data acquisition subsystem is used for electrolyte temperature data
Gather and process.
The system of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte the most according to claim 1,
It is characterized in that, the number of described measuring unit is six, and the number of described non-contact temperature sensor (1) is
Two.
The system of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte the most according to claim 1,
It is characterized in that, described non-contact temperature sensor (1) is infrared temperature instrument.
The system of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte the most according to claim 1,
It is characterized in that, in described cavity (10), be provided with heat-preservation liner (13).
The system of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte the most according to claim 1,
It is characterized in that, described heating furnace (5), non-contact temperature sensor (1) and bracket (7) are coaxially disposed.
The system of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte the most according to claim 1,
It is characterized in that, in described first drive mechanism (2), the second drive mechanism (4) and the 3rd drive mechanism (6)
Any one drive mechanism be the linear motion that drives of pneumatic system and rotational motion mechanism, or motor-driven ball
Lead screw straight-line and rotational motion mechanism.
The system of full-automatic seriality non-contact measurement liquidus temperature of aluminium electrolyte the most according to claim 1,
It is characterized in that, described crucible (3) is stainless steel crucible or graphite crucible.
8. a kind of full-automatic seriality non-contact measurement aluminium electrolyte primary crystal temperature based on system described in claim 1
The method of degree, said method comprising the steps of:
1) system starts, when a measuring unit job, aluminium electrolyte sample is placed in crucible (3),
Crucible (3) is placed on feeding swing arm (9) station, after by motion control subsystem, pressing " startup " button,
Feeding swing arm (9) is rotated by the 3rd drive mechanism (6) by " waiting feeding position " or is moved to " feeding position ",
Bracket (7) holds crucible (3), feeding swing arm (9) after being risen to " feeding position " by the second drive mechanism (4)
Returning to " waiting feeding position ", bracket (7) is together transmitted by following first drive mechanism (2) with crucible (3)
" measurement position " to the cavity (10) of heating furnace (5), " measurement position " can be passed through height adjuster (8) and adjust
Saving bracket (7) thus be finely adjusted, cavity (10) is sealed formation by the sealing ring (12) of bracket (7) bottom
Close；
2) after crucible (3) enters heating furnace (5), heating furnace (5) is controlled by temperature control subsystem (14)
Heating up, aluminium electrolyte sample is heated to electrolyte melt temperature, constant temperature, then with the at the uniform velocity fall of 5-10 DEG C/min
Temperature is to standby temperature, and during electrolyte reaches melt temperature and cools to standby temperature, non-contact temperature passes
The change of sensor (1) monitoring electrolyte temperature, and it is bent to set up Temperature-time relation by data acquisition process subsystem
Line, data acquisition process subsystem identifies and Detection curve flex point automatically, and at knee of curve, temperature is aluminium electrolyte
Liquidus temperature；
3) after one-shot measurement completes, crucible (3) is sent to discharging position by bracket (7), and feeding swing arm (9) is real
The automatic discharging of existing crucible (3), furnace temperature maintains standby temperature, prepares to measure next time；
4) when multiple measuring units work, by the logic control instruction of motion control subsystem, when a measurement
When unit completes primary crystal temperature measurement, in another measuring unit, crucible (3) electrolyte has just melted, and non-connects
Touch temperature sensor (1) is automatically transmitted to this another measuring unit and starts to measure, and other measuring unit is successively
Analogize, thus realize measuring uninterruptedly going on continuously of work.
Method the most according to claim 8, it is characterised in that step 2) in temperature-rise period use PID
The method controlling heating-up temperature realizes.
Method the most according to claim 8, it is characterised in that described electrolyte selects the aluminum of CR=2.72
Electrolyte, described aluminium electrolyte melt temperature is 980 DEG C, and described standby temperature is 880 DEG C, and described liquidus temperature is
954.7℃。
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| CN201410039720.9A CN103759835B (en) | 2014-01-27 | 2014-01-27 | The system and method for full-automatic seriality non-cpntact measurement liquidus temperature of aluminium electrolyte |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140187A (en) * | 2007-01-23 | 2008-03-12 | 韩伟 | Primary crystal temperature measurement equipment of aluminium electrolysis electrolytes |
| CN201392321Y (en) * | 2009-04-23 | 2010-01-27 | 亚太电效系统(珠海)有限公司 | Device for automatically measuring liquidus temperature of electrolyte |
| CN101871821A (en) * | 2009-04-23 | 2010-10-27 | 亚太电效系统(珠海)有限公司 | Electrolyte primary crystal temperature measuring method |
| CN203672496U (en) * | 2014-01-27 | 2014-06-25 | 北京嘉品源软件有限公司 | Automatic system for continuous measurement of primary crystal temperature of aluminum electrolyte in non-contact manner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02296121A (en) * | 1989-05-10 | 1990-12-06 | Nippon Steel Corp | Surface-temperature measuring of object in heating furnace |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140187A (en) * | 2007-01-23 | 2008-03-12 | 韩伟 | Primary crystal temperature measurement equipment of aluminium electrolysis electrolytes |
| CN201392321Y (en) * | 2009-04-23 | 2010-01-27 | 亚太电效系统(珠海)有限公司 | Device for automatically measuring liquidus temperature of electrolyte |
| CN101871821A (en) * | 2009-04-23 | 2010-10-27 | 亚太电效系统(珠海)有限公司 | Electrolyte primary crystal temperature measuring method |
| CN203672496U (en) * | 2014-01-27 | 2014-06-25 | 北京嘉品源软件有限公司 | Automatic system for continuous measurement of primary crystal temperature of aluminum electrolyte in non-contact manner |
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