SU1423627A1 - Method of checking concentration of alumina in cryolite alumina melt - Google Patents
Method of checking concentration of alumina in cryolite alumina melt Download PDFInfo
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- SU1423627A1 SU1423627A1 SU864156522A SU4156522A SU1423627A1 SU 1423627 A1 SU1423627 A1 SU 1423627A1 SU 864156522 A SU864156522 A SU 864156522A SU 4156522 A SU4156522 A SU 4156522A SU 1423627 A1 SU1423627 A1 SU 1423627A1
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- alumina
- concentration
- anode
- melt
- cryolite
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- Electrolytic Production Of Metals (AREA)
Description
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оо а: tc oo a: tc
Изобретение относитс к металлургии алюмини и может быть использовано при получении алюмини электролизом расплавов .The invention relates to the metallurgy of aluminum and can be used in the production of aluminum by the electrolysis of melts.
Цель изобретени иовьпнеиие точности контрол .The purpose of the invention is the accuracy of control.
Согласно способу контрол концентрации глинозема в криолитглиноземном расплаве , включающему пол ризацию псгюмо- гательиого анода, нведениого в электролизер , концентрацию глинозема определ ют по времени достижени заданного потенциала вспомогательного анода, пол ризуемого импульсом посто нного тока, вход щего в систему трехэлектродного датчика, включающего дополнительно катод и электрод сравнени с жесткой фиксацией электродов относительно друг друга, подключаемого к приставке, включающей полиризую- щую и измерительную части, и эталонной зависимости врем достижени заданного потенциала - концентраци глинозема (см. чертеж).According to the method of controlling the concentration of alumina in the cryolit-alumina melt, which includes the polarization of an anode annealed into the electrolyzer, the concentration of alumina is determined by the time it reaches the specified potential of the auxiliary anode polarized by a pulse of direct current entering the three-electrode sensor including an additional cathode and a comparison electrode with rigid fixation of the electrodes relative to each other, connected to the set-top box, including the polishing unit and the measuring part And the reference time to reach a predetermined dependence capacity - the concentration of alumina (see drawing.).
Пример. В рабочий электролизер опускаетс датчик, состо щий из 3 никелевых электродов, изолированных друг от друга, и с жестк(зй фиксацией относительно друг друга. На два электрода подаетс импульс тока, обеспечивающий анодную плотность тока 0,45 А/см от пол ризующей части приставки. В измерительной ее части коммутаторным методом измер етс величина потенциала анода относительно третьего непол ризованного электрода и измер етс электронным хронометром, например частотомером Ф 5137, врем от начала включени до достижени потенциала анода 200 мВ. По его величиие и эталонному графику врем достижени заданного потеи- циала - концентраци глинозема определ етс последн в электролите ванны. Далее приставка подключаетс к датчику следующей ванны или датчик вынимаетс из электролита , и измерени провод тс на других ваннах.Example. A sensor consisting of 3 nickel electrodes, isolated from each other, and rigid (the fixation relative to each other) is lowered into the working electrolyzer. A current pulse is applied to the two electrodes, providing an anode current density of 0.45 A / cm from the polarizing part of the attachment In the measuring part of it, the potential of the anode relative to the third unpolarized electrode is measured by a switch method and measured by an electronic chronometer, for example, a frequency meter F 5137, the time from the start of switching on until the potential of the anode is 200 mV. its greatness and the reference time to reach a predetermined schedule potei- tial - alumina concentration is determined by the latter into the electrolyte bath Next console is connected to the sensor following a bath or probe is removed from the electrolyte, and measurement are carried out on other baths..
Точность метода определени концентрации глинозема провер ли следующим образом .The accuracy of the method for determining the concentration of alumina was checked as follows.
Готовили расплавы с известным содержанием глинозема от I до 6 мас.% и проводили электрохимические исследовани с ними путем измерени времени достижени потенциала анода в 200 мВ при нол рнMelts were prepared with a known alumina content from I to 6 wt.% And electrochemical studies were carried out with them by measuring the time to reach an anode potential of 200 mV at zero.
зации чейки плотностью тока в 0,45 Л/см По результатам измерений строилас)) эталон на злииси.мость. Далее исслсдоналнгь расплавы с неизиестн1 1м содержанием глинозема . KOTopot- г)|1рсде. 1 л()сь но нредлач ае- мому методу и химическим ана. жзом. F ac- хождение ре.зультатов не превьннало 0,3% (абс.), что говорит о достаточно высокой точности предлагаемого способа определени концентрации глинозема в криолит- г л и н оз е м н ы х р а с 11 л а и а х.cell configuration with a current density of 0.45 L / cm. According to the measurement results, construction)) is the reference standard for ziisi.most. Further, exploration of melts with non-11m alumina content. KOTopot-g) | 1sde. 1 l () c) but the preferred method of the method and chemical ana. zhzom F ac- tion of res. Results did not exceed 0.3% (abs.), Which indicates a sufficiently high accuracy of the proposed method for determining the concentration of alumina in cryolite-ohl and m ozmnyshra with 11 l and a x
По известному способу контролируетс величина напр жени между вспомогатель-. ным анодо.м и катодом ванны, котора включает в себ потенциалы анода, катодаBy a known method, the voltage between the auxiliary voltage is controlled. the cathode of the bath, which includes the potentials of the anode, cathode
и омические падени напр жени в аноде, катоде и электролите. По предлагаемому способу врем достижени заданною потенциала определ етс только потенциалом анода и не зависит от всех других состав л ющих падени напр жени . Таким образом , резко уменьн1аетс число неконтролируемых факторов, колебани которых обуслов т искажение результатов измерений (например, колебани токовой нагрузки приведет к изменении: 01 ических составл юН1ИХ падени напр жени , к это.му же привод т и перекосы тока в ванне, и т.д.), поэтому точность и надежность предлагаемого способа должна быт) по сравнению с известным.and ohmic voltage drops in the anode, cathode and electrolyte. According to the proposed method, the time to reach a given potential is determined only by the potential of the anode and does not depend on all other components of the voltage drop. Thus, the number of uncontrollable factors, which fluctuations cause distortion of measurement results, sharply decreases (for example, fluctuations of the current load will lead to a change in: 01% of the voltage drop, and this also causes current distortions in the bath and so on. d.), therefore, the accuracy and reliability of the proposed method should be compared with the known.
Ожидаемый эффект спосг)ба состоит вThe expected effect sposg) ba is
точности, надежности и оперативности контрол концентрации глинозема в электролите , что приведет к повьпнению стабильности работы электролизеров и их технико- экономических показателей.accuracy, reliability and efficiency of monitoring the concentration of alumina in the electrolyte, which will lead to povpneniyu stability of the operation of electrolyzers and their technical and economic indicators.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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SU864156522A SU1423627A1 (en) | 1986-10-20 | 1986-10-20 | Method of checking concentration of alumina in cryolite alumina melt |
Applications Claiming Priority (1)
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SU864156522A SU1423627A1 (en) | 1986-10-20 | 1986-10-20 | Method of checking concentration of alumina in cryolite alumina melt |
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SU1423627A1 true SU1423627A1 (en) | 1988-09-15 |
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SU864156522A SU1423627A1 (en) | 1986-10-20 | 1986-10-20 | Method of checking concentration of alumina in cryolite alumina melt |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997009468A1 (en) * | 1995-09-01 | 1997-03-13 | Auckland Uniservices Limited | Measurement of alumina in reduction pots |
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1986
- 1986-10-20 SU SU864156522A patent/SU1423627A1/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997009468A1 (en) * | 1995-09-01 | 1997-03-13 | Auckland Uniservices Limited | Measurement of alumina in reduction pots |
US6010611A (en) * | 1995-09-01 | 2000-01-04 | Auckland Uniservices Limited | Measurement of alumina in reduction pots |
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