CN1546735A - In-situ on-line determining instrument for determining primary crystallization temperature and molecule ratio of aluminium electrolyte - Google Patents
In-situ on-line determining instrument for determining primary crystallization temperature and molecule ratio of aluminium electrolyte Download PDFInfo
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- CN1546735A CN1546735A CNA2003101115930A CN200310111593A CN1546735A CN 1546735 A CN1546735 A CN 1546735A CN A2003101115930 A CNA2003101115930 A CN A2003101115930A CN 200310111593 A CN200310111593 A CN 200310111593A CN 1546735 A CN1546735 A CN 1546735A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 27
- 239000003792 electrolyte Substances 0.000 title claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000004411 aluminium Substances 0.000 title claims abstract description 21
- 238000002425 crystallisation Methods 0.000 title abstract 2
- 230000008025 crystallization Effects 0.000 title abstract 2
- 238000011065 in-situ storage Methods 0.000 title 1
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 240000003936 Plumbago auriculata Species 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 7
- 239000000523 sample Substances 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 2
- 238000005868 electrolysis reaction Methods 0.000 description 13
- 230000006870 function Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000013178 mathematical model Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 235000010689 Lufa Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000009866 aluminium metallurgy Methods 0.000 description 1
- 239000000538 analytical sample Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention relates to an n-situ on-line determining instrument for determining primary crystallization temperature and molecule ratio of aluminium electrolyte, which realizes the determination of electrolyte molecular ratio through the measurement of electrolyte primary crystal temperature, wherein the instrument comprises a furnace and a temperature probe of the signal acquisition system, the measuring and processing system comprises an industrial control machine, a RAM memory, an EPROM memory, a liquid crystal display, a keyboard, an A/D converter, a D/A converter, and the temperature elevation control system comprises a driver element and an electric furnace.
Description
Technical field:
The present invention relates to a kind of electrolysis of aluminum smelting technology and device, especially a kind of electrolyte for electrolyzing aluminium liquidus temperature and molecular ratio determining instrument.
Background technology:
Facts have proved of Aluminium Electrolysis, when adopting Hall-Ai Lufa aluminium metallurgy, the composition of aluminium electrolyte and electrolysis of aluminum service temperature have significant effects to the economic and technical norms of Aluminium Electrolysis.Liquidus temperature is an important properties of electrolysis of aluminum system, and it and electrolysis of aluminum service temperature have direct relation.When 10 ℃ of electrolyte temperature reductions, current efficiency can improve 2%.Melt too high or too low for temperature all will influence normally carrying out of metallurgical production operation, in time detect and control the temperature of melt, be one of essential condition that guarantees the metallurgical production normal operation.Because aluminium electrolyte temperature height, corrodibility are strong, therefore measuring its electrolysis temperature and liquidus temperature how in time, quickly and accurately, is the mensuration of the important topic in the electrolysis of aluminum operation, particularly liquidus temperature, basically be only limited in the laboratory and carry out, still do not have special-purpose instrument at present
Electrolyte components difference, its molecular ratio are also different.Electrolytical molecular ratio suitably reduces, and its liquidus temperature also descends thereupon, and this helps reducing electrolysis temperature, improves current efficiency.The lower molecular ratio operation is the important symbol of modern energy-efficient aluminium cell.The industrial mensuration to the electrolyte molecule ratio of electrolytic aluminum mainly adopts large-scale diffractometer mensuration and chemical analysis method to measure now.Used diffractometer belongs to large-scale analytical instrument in the instrumental analysis, cost an arm and a leg, and working conditions and environmental requirement strictness, needing to drop into a large amount of financial resources and manpowers could carry out.Present most electrolytic aluminium factory is not purchased this kind equipment.The tired lock of chemical analysis operation steps, analysis time is long, is difficult to satisfy the production needs.Also have and adopt polarizing microscope to carry out the manual observation definite value, but this method is impractical in lower molecular ratio and forms complicated ionogen.
Have some dependency between electrolytical liquidus temperature, chemical constitution and the molecular ratio, existing investigator has drawn relevant experimental formula, but suitability is not strong.Because the ionogen of each electrolytic aluminium factory is formed different, therefore be difficult to describe it with a unified liquidus temperature mathematical model.And use existing experimental formula to calculate liquidus temperature to depend on the chemico-analytic accuracy of electrolyte components, and chemical analysis often will spend long time, causes analytical results can not in time obtain feedback and produces in order to control.
Directly measure the electrolyte primary crystal temperature, and also do not enter the practical stage owing to the difficulty on the liquidus temperature mensuration by its forecast molecule ratio.
Summary of the invention:
The present invention is according to the definition of electrolyte for electrolyzing aluminium matter liquidus temperature, by the control of introducing computer and the power of data processing, designed the electrolyte for electrolyzing aluminium liquidus temperature determinator of Special Automaticization, data handling system wherein can be set up the ionogen composition that tallies with the actual situation and the relation of liquidus temperature on the basis of real data, the relation of ionogen composition and its molecular ratio, the relation of electrolyte primary crystal temperature and its molecular ratio, thereby realized measuring electrolytical molecular ratio, the preceding on-line determination of groove of electrolyte molecule ratio is come true by measuring this physical quantity of electrolyte primary crystal temperature.
The technical solution used in the present invention is:
The key technical indexes that the present invention can reach is:
Power supply :～220V, 50Hz-60Hz furnace power: 2KW
Analyser outward current :≤9A
Temperature Measure Control scope: 0～1050 ℃
Temperature-controlled precision :≤0.3%FS ± 1dig
Display mode: LCD numeral, graphic presentation (liquidus temperature T, molecular ratio CR and cooling curve; Date, time, groove number)
Measuring accuracy: 1. liquidus temperature error :≤± 2 ℃; 2. molecular ratio prediction error :≤± 0.03
Perfect measurement time a :≤15min
Overall weight: 15 kilograms
The major function that the present invention had:
(1) measures aluminium electrolyte liquidus temperature (T), forecast molecular ratio (CR) and other relevant parameter.
(2) on LCD, show cooling curve, obtain liquidus temperature, molecular ratio numerical value and on LCD, show; And date and time is measured in demonstration.
(3) available mini-printer is exported the parameter of measured sample on request.
(4) composition, content and the groove that the certain parameter of input can show sample number.Can form and content according to different liquidus temperatures and liquidus temperature Derivation of Mathematical Model ionogen that the user provides: 1. import the content of materials such as X1, X2, X3, obtain the content of other material and on LCD, show each components contents value; 2. given any component concentrations scope is obtained all possible concentration of remaining ingredient and is shown at LCD.
(5) possesses an interface with the computer communication, to finish the function of data storage inquiry.
(6) this instrument has self-checking function and can show nature of trouble on LCD.
(7) has the intensification temperature controlling function.
(8) adding thermal output can regulate arbitrarily.
(9) control accuracy height, stable performance.
(10) possess parameter function is set.(the liquidus temperature mathematical model can be set, the molecular ratio calculation formula)
(11) have electric current, voltage display gauge head.
This determinator compact construction, small and exquisite portable, measure quick, result accurately, low price.
In order to understand the present invention ground entity more particularly, instrument is described in detail as follows:
Description of drawings:
Fig. 1 is a fundamental diagram of the present invention.
Fig. 2 is a furnace construction synoptic diagram of the present invention.
Fig. 3 is a structured flowchart of the present invention.
Embodiment:
Whole instrument is divided into three parts: the signal acquiring system of being made up of stove IX and temperature sensor IV; The measurement treatment system of forming by industrial computer I, RAM memory V, EPROM memory X, liquid-crystal display VI, keyboard VII, A/D converter II, D/A converter III; The intensification temperature controlling system of forming by driver element VIII, electric furnace IX.
Industrial computer I is by the data line III that links to each other with RAM memory V, EPROM memory X, D/A converter; Industrial computer links to each other with liquid-crystal display VI, driver element VIII by output control line; Keyboard VII, A/D converter II link to each other with industrial computer I by output data line; Driver element VIII output links to each other with electric furnace IX.Whole instrument is a control center with industrial computer I, call data by RAM memory V and EPROM memory X, program, and on liquid-crystal display VI, show data and net result in the mensuration process, all controlled variable can be by keyboard VII input, electric furnace IX temperature is gathered and is transferred numerary signal to by A/D converter II by transmitter IV and passes to industrial computer, industrial computer compares numerary signal, handle, on indicating meter VI, show, and pass to driver element VIII after being converted to simulating signal by D/A converter III, heat up and reach the control electric furnace, the purpose of cooling.After the opening power, industrial computer I starts, after the operating analysis program, industrial computer is by parameter in RAM memory V and the design of EPROM memory X calling program, electric furnace IX temperature is by transmitter IV, transfer numerary signal to by A/D converter and feed back to industrial computer, industrial computer is presented at furnace on the liquid-crystal display VI, and the signal that feeds back to and the parameter of calling compared handle the back and send instruction for driver element VIII by D/A converter III, control the lifting of stove IX temperature, in analytic process, can come the interruption of intervention analysis and re-enter parameter by keyboard VII input order, industrial computer can be stored the parameter of input among the RAM memory V, so that routine analyzer calls, after the cooling curve that shows on the liquid-crystal display is observed primary crystal point, can send the temperature that instruction shows primary crystal point by keyboard, instrument is noted liquidus temperature automatically, send instruction by keyboard again and come the analyzing molecules ratio, and the result of liquidus temperature and molecular ratio is presented on the indicating meter, analytical results can be printed and storage after the input print command.
Electrothermal oven structure of the present invention is:
A is a pedestal, is the refractory brick of stainless steel parcel; B is a plumbago crucible, is used to adorn analytical sample, can put into taking-up from the opening part on the c; C is that material is stainless supporting seat, is used to support body of heater j moving up and down; D is a heater strip, and coiled one circle in e is used for heating stove is heated up; E is the stove that refractory brick is built into; F uses the handle when moving up and down body of heater for the holder handle; G is a bell, on have aperture h, be used to regulate the stove rate of heat release, cooling rate when regulate measuring; I is a thermocouple jack, is used to insert thermopair taking-up signal and delivers to computer; J is the body of heater shell, is stainless steel, and whole body of heater can move up and down, and put into to make things convenient for crucible to take out, but left rotation and right rotation once goes up and do not fall down so that drop on c after j up moved one section.K is an outlet, and it is by the size and the break-make of computer control supply power.
Being described as follows of power pack: wherein (1) is external source, after inserting 220 volts of alternating-current, divide two-way to power, wherein lead up to safety fuse (2) to instrument, be divided into three branch roads behind the switch (3) again: the one tunnel directly gives fan (4) power supply, and the hot gas of instrument internal is discharged; One the tunnel outputs to transformer (5) input terminus, transformer output termination controllable silicon controller (7), reometer (8), silicon controlled rectifier (9) to stove (11) energising, (10) be voltmeter, be used to monitor this road magnitude of voltage, adjust the size of current of supplying with stove by potentiometer (6) and control the stove heat-up rate; One the tunnel gives sequence controller (12) power supply.After safety fuse (14), switch (15), computer power supply (16) are passed through in another road, give computer motherboard (17), printer (18), indicating meter (19) power supply respectively.
The signal transput declaration is as follows: after the power supply, computer starting, the temperature of stove (11) is measured by thermopair (13), signal feedback carries out analog to digital conversion for sequence controller (12), again the temperature digital signal is passed to computer (17), after computer is handled, can on indicating meter, (19) show, also can print by printer (18), the computer machine compares the intensification higher limit of temperature value measured and setting, if reach higher limit, then by sequence controller (12), controllable silicon controller (7) disconnects furnace power, if do not reach higher limit, then continue to power to stove, temperature is constantly risen, in this process, can control the furnace lift velocity by regulator potentiometer (6).The furnace value passes to computer motherboard by thermocouple measurement through sequence controller, and on indicating meter the displays temperature curve, can give the computer input control order by mouse (20) or keyboard (21), interrupt measuring process or show liquidus temperature by process of measurement, and can intervene measuring process according to the practical situation input order.
Information acquisition system and measure treatment system and can be installed in the suitcase that electro-magnetic screen function arranged.
Embodiment:
(1) gets 10 and keep samples with its liquidus temperature of Instrument measuring of the present invention, predictive molecule ratio, with existing chemical composition data computational analysis ratio, prediction and molecule that calculates and the molecular ratio of measuring with diffractometer match, analytical results and electrolysis production control trend are coincide, and the minute of each sample was less than 20 minutes.Concrete outcome is as follows:
Table 1 molecular ratio measurement result (former keep sample)
| Numbering | The X diffraction | Analyser before the XCA-1B aluminium electrolyte groove | Component content | |||||
| ????BR | At the beginning of the T (℃) | ????BR | Calculate BR | Al 2O 3，％ | MgF 2，％ | LiF，％ | CaF 2，％ | |
| ????1 | ????1.11 | ????905.6 | ????1.08 | ????1.12 | ????3.50 | ????2.09 | ????0.99 | ????6.34 |
| ????2 | ????1.14 | ????911.6 | ????1.11 | ????1.17 | ????3.83 | ????2.04 | ????0.98 | ????5.50 |
| ????3 | ????1.20 | ????941.2 | ????1.23 | ????1.19 | ????4.57 | ????0.20 | ????0.58 | ????3.66 |
| ????4 | ????1.21 | ????923.4 | ????1.17 | ????1.20 | ????5.14 | ????1.60 | ????1.00 | ????5.27 |
| ????5 | ????1.23 | ????923.4 | ????1.17 | ????1.19 | ????6.09 | ????1.57 | ????1.02 | ????5.24 |
| ????6 | ????1.28 | ????938.3 | ????1.26 | ????1.32 | ????3.23 | ????1.68 | ????0.90 | ????4.93 |
| ????7 | ????1.33 | ????949.6 | ????1.34 | ????1.35 | ????6.10 | ????1.28 | ????0.70 | ????4.54 |
| ????8 | ????1.36 | ????958.2 | ????1.40 | ????1.44 | ????1.60 | ????1.60 | ????0.73 | ????5.09 |
| ????9 | ????1.40 | ????959.3 | ????1.40 | ????1.46 | ????1.47 | ????1.72 | ????0.80 | ????5.30 |
| ????10 | ????1.45 | ????960.0 | ????1.41 | ????1.41 | ????1.25 | ????1.23 | ????0.68 | ????5.16 |
(2) determinator of the present invention is moved to the electrolysis plant electrolyzer before, get the sample of 10 grooves at the scene, with the electrolytical liquidus temperature of this Instrument measuring, the predictive molecule ratio; Sampling simultaneously, with diffractometer analyzing molecules ratio, two molecular ratio results match, and analytical results and electrolysis production control trend are coincide, and the minute of each sample was less than 20 minutes.The upfield of electrolysis plant, high temperature, dust atmosphere do not influence the on-the site analysis of the preceding analyser of XCA-1B type aluminium electrolyte groove and measure.Concrete outcome is as follows:
Table 2 on-site sampling measurement result
| Groove number | The X diffraction | Analyser before the XCA-1B type aluminium electrolyte groove | |
| ????BR | At the beginning of the T | ????BR | |
| ????231 | ????1.34 | ????962.2 | ????1.38 |
| ????217 | ????1.19 | ????942.7 | ????1.22 |
| ????201 | ????1.23 | ????932.2 | ????1.22 |
| ????202 | ????1.30 | ????955.8 | ????1.32 |
| ????227 | ????1.29 | ????945.4 | ????1.31 |
| ????226 | ????1.30 | ????952.0 | ????1.36 |
| ????214 | ????1.29 | ????949.5 | ????1.32 |
| ????210 | ????1.28 | ????957.2 | ????1.31 |
Claims (3)
1, on-line determination instrument before a kind of electrolyte for electrolyzing aluminium liquidus temperature and the molecular ratio groove is characterized in that:
By measuring the aluminium electrolyte cooling curve, measure liquidus temperature, analyze the electrolyte molecule ratio by liquidus temperature again;
Information acquisition system that determinator is made up of electrothermal oven and temperature sensor and intensification temperature controlling system, measure treatment system and constitute.
2, on-line determination instrument before electrolyte for electrolyzing aluminium liquidus temperature according to claim 1 and the molecular ratio groove, it is characterized in that electrothermal oven comprises: the supporting seat (c) that is used to support the body of heater (j) that can move up and down, rotate is fixed on substrate (a), the opening part of supporting seat (c) is movable puts into, takes out plumbago crucible sample charging device (b), be connected with holder being wound with heater strip (d) in the stove of (f) (e), have some apertures (h) on the bell of furnace roof (g), be provided with thermocouple jack (i) in the middle of the stove (e).
3, on-line determination instrument before electrolyte for electrolyzing aluminium liquidus temperature according to claim 1 and the molecular ratio groove is characterized in that:
All controlled variable can be come the interruption of intervention analysis and re-enter parameter in analytic process by keyboard VII input by keyboard VII input order;
After the cooling curve that shows on the liquid-crystal display is observed primary crystal point, can send the temperature that instruction shows primary crystal point by keyboard, automatically note liquidus temperature in the instrument, send instruction by keyboard again and come the analyzing molecules ratio, and analytical results is shown, prints, stores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101115930A CN1546735A (en) | 2003-12-10 | 2003-12-10 | In-situ on-line determining instrument for determining primary crystallization temperature and molecule ratio of aluminium electrolyte |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101115930A CN1546735A (en) | 2003-12-10 | 2003-12-10 | In-situ on-line determining instrument for determining primary crystallization temperature and molecule ratio of aluminium electrolyte |
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| CN1546735A true CN1546735A (en) | 2004-11-17 |
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| CNA2003101115930A Pending CN1546735A (en) | 2003-12-10 | 2003-12-10 | In-situ on-line determining instrument for determining primary crystallization temperature and molecule ratio of aluminium electrolyte |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140248B (en) * | 2007-09-10 | 2010-10-13 | 韩伟 | Portable example temperature lift-down curve measurement mechanism |
| CN101506407B (en) * | 2006-06-27 | 2012-07-18 | 美铝公司 | Systems and methods useful in controlling operations of metal electrolysis cells |
| CN103954522A (en) * | 2014-05-16 | 2014-07-30 | 北方工业大学 | Method for measuring electrolyte molecular ratio in aluminum electrolysis process |
-
2003
- 2003-12-10 CN CNA2003101115930A patent/CN1546735A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101506407B (en) * | 2006-06-27 | 2012-07-18 | 美铝公司 | Systems and methods useful in controlling operations of metal electrolysis cells |
| CN101140248B (en) * | 2007-09-10 | 2010-10-13 | 韩伟 | Portable example temperature lift-down curve measurement mechanism |
| CN103954522A (en) * | 2014-05-16 | 2014-07-30 | 北方工业大学 | Method for measuring electrolyte molecular ratio in aluminum electrolysis process |
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