CN102914489A - Device and method for measuring viscosity electromagnetic property of covering slag under high-temperature state - Google Patents
Device and method for measuring viscosity electromagnetic property of covering slag under high-temperature state Download PDFInfo
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- CN102914489A CN102914489A CN2012104433544A CN201210443354A CN102914489A CN 102914489 A CN102914489 A CN 102914489A CN 2012104433544 A CN2012104433544 A CN 2012104433544A CN 201210443354 A CN201210443354 A CN 201210443354A CN 102914489 A CN102914489 A CN 102914489A
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Abstract
The invention relates to a device and method for measuring the viscosity electromagnetic property of covering slag under a high-temperature state and belongs to the technical field of the viscosity electromagnetic property measurement of covering slag in the metallurgical industry. The adopted technical scheme is that a plurality of turns of water-cooling copper induction coils are wound outside a furnace body of a high-frequency heating furnace, an induction heating manner is adopted, and the power supply oscillation frequency is 20 KHz; a viscosity test instrument comprises a synchronous motor, a photoelectric switch, a suspension wire, a molybdenum connecting bar, a graphite probe, a graphite crucible and a microcomputer control system; the to-be-detected covering slag is filled into the graphite crucible which is placed in the furnace body for high-frequency heating after being subjected to decarbonization; and an inner-cylinder body rotational method is adopted to measure the viscosity electromagnetic property of the covering slag under the high-temperature state. The device and the method have the benefits of simplicity in operation, accuracy in measurement and low cost, is favorable for being intensively studied, and can be used for studying the viscosity property of the covering slag under the action of a high-frequency magnetic field; and in addition, the viscosity property is very important for making clear the covering slag metallurgical action during soft-contact electromagnetic continuous casting process and for liquid steel solidification influence mechanism.
Description
Technical field
The present invention relates to measurement mechanism and the measuring method of covering slag viscosity electromagnetic property under a kind of condition of high temperature, belong to the field of measuring technique of metallurgy industry covering slag viscosity electromagnetic property.
Background technology
Though continuous casting technology has been obtained significant progress through the development in century more than one, and imperfect, and continuous casting billet production also exists various quality problems such as inherent vice, shape defect and surface imperfection.Soft-contact Electromagnetic Continuous can effectively be eliminated the casting billet surface oscillation mark, improves cc billet surface quality.Its ultimate principle is to arrange inductive coil and pass to exchange current on the crystallizer top with joint-cutting splitted structure, and interact to produce the electromagnetism wall pressure with alternating magnetic field, alleviate molten steel to the contact of crystallizer inwall, thereby realize " soft-contact electromagnetic continuous casting " of steel billet.
Crystallizer protecting residue is very important functional material in the casting process, to casting process carry out smoothly play an important role with cc billet surface quality.Covering slag viscosity is to be characterized in the size that slag under uniform temperature and the certain shearing force effect flows into strand and crystallizer gap ability.Be one of important physical property of covering slag, it directly has influence on the formation of strand oscillation mark, the lubrication of slag film and the ability of melt cinder absorb inclusion thing.Covering slag has suitable viscosity, is that assurance covering slag slag can be inserted passage between crystallizer and strand smoothly, and the slag film has suitable depth and has the key of reasonable heat transfer rate and lubricated strand.The viscosity performance of covering slag under the high frequency magnetic field effect is most important for verifying the metallurgical behavior of soft-contact electromagnetic continuous casting covering slag and solidification of molten steel being affected mechanism.
At present, each Research Literature describes that the covering slag performance mainly concentrates on the aspects such as electric conductivity, crystal property under the AC field effect, yet there are no report for viscosity characteristics.Can predict, under the high-frequency alternating electromagnetic field effect, be bound to be subject to the effect of high frequency magnetic field power as the covering slag in the crystallizer of electric conductor, and then affect flowing of covering slag, change the viscosity of covering slag.Therefore, develop a kind of simple to operately, measure accurately, with low cost and be beneficial to measurement mechanism and the measuring method of covering slag viscosity electromagnetic property under the condition of high temperature of large quantity research, be this area problem demanding prompt solution.
Summary of the invention
The object of the invention provides measurement mechanism and the measuring method of covering slag viscosity electromagnetic property under a kind of condition of high temperature; simple to operate; measure accurately; with low cost and be beneficial to large quantity research; can study the viscosity characteristics of covering slag under the high frequency magnetic field effect; verify the metallurgical behavior of soft-contact electromagnetic continuous casting covering slag, solve the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: the measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature, formed by dielectric heating oven and viscosity tester two parts, multiturn water-cooled copper inductive coil is put in the body of heater outer shroud winding of dielectric heating oven, viscosity tester comprises synchronous motor, optoelectronic switch, suspension, the molybdenum connecting link, the graphite probe, graphite crucible and Control System of Microcomputer, the output terminal of synchronous motor connects suspension successively, molybdenum connecting link and graphite probe, the two ends of suspension arrange respectively optoelectronic switch, and Control System of Microcomputer is control linkage synchronous motor and optoelectronic switch respectively; With the covering slag to be measured graphite crucible of after carbonization treatment, packing into, put into the body of heater high-frequency heating, adopt the inner cylinder rotary process to carry out the measurement of covering slag viscosity electromagnetic property under the condition of high temperature.
Described dielectric heating oven, supporting high frequency electric source cabinet, high frequency output cabinet, control instrument cabinet, thermopair and the Displaying Meter of arranging, thermopair is arranged on the bottom of body of heater, connects Displaying Meter, is used for the temperature value of Real-time Collection covering slag to be measured; The control instrument cabinet adopts the Totally integrated digital circuit, is used for output power, the concussion frequency parameter of Real-time Collection high-frequency heating body of heater, and has the manual adjustments power functions.
4 circle water-cooled copper inductive coils are put in the winding of described body of heater outer shroud, play heating furnace and the double action that high frequency magnetic field is provided, and covering slag to be measured is positioned in the body of heater, heats and carry out viscosity measurement; The high frequency electric source cabinet adopts the IGBT power supply of widespread use in the modern power electronics technology, and it is little to have a driving power, and switching speed is fast, has again saturation pressure and reduces the advantage that output capacity is large; The high frequency output cabinet has overcurrent, overvoltage, lack of water, overtemperature, default-phase protection function, makes equipment security of operation, reliable.
Described synchronous motor rotates, and drives the graphite probe through suspension, molybdenum connecting link and rotates.
Described optoelectronic switch comprises shadow shield, light source and photoelectric tube, and the two ends of suspension arrange respectively shadow shield and lower shadow shield, and the both sides of upper shadow shield arrange respectively light source and upper photoelectric tube, and the both sides of lower shadow shield arrange respectively lower light source and lower photoelectric tube.
Described graphite crucible wall thickness 6.5mm namely satisfies the constant temperature needs, satisfies again the intensification needs.
The present invention also is provided with elevating mechanism, is comprised of stepper motor, bracing frame, cantilever and leading screw, and stepper motor and leading screw are installed on the bracing frame, and cantilever is fixed in the leading screw top, and stepper motor drives leading screw and moves up and down, and moves up and down thereby drive cantilever.
Also be provided with electrical control cabinet, have control main power switch function, set direction, the crawl that also is provided with simultaneously elevating mechanism starts, the failure reset button, and the synchronous motor shift knob; Control System of Microcomputer is equipped with a cover viscosity test experiment software, is provided with two kinds of test modes of constant temperature viscosimetric and alternating temperature viscosimetric, simultaneously, but on-line testing and the real-time experimental data of preserving.
The measuring method of covering slag viscosity electromagnetic property under a kind of condition of high temperature adopts above-mentioned measurement mechanism to measure, and comprises following steps:
1. the graphite crucible of the covering slag to be measured after carbonization treatment being packed into, and put it in the body of heater of dielectric heating oven, open the dielectric heating oven switch, regulating frequency is to 18kHz, stove heat temperature raising;
2. the furnace temperature for the treatment of dielectric heating oven rises to 200 ℃, opens chilled water;
3. demarcate the constant of viscosity tester
KThe value and
t 0 , utilize standard oil to test, demarcate;
4. after slag to be protected melts fully, manually measure liquid level, and fix at rotational viscosimeter molybdenum connecting link subscript and to fall the position;
5. viscosimetric analysis: during the constant temperature viscosimetric, when rising to 1250 ℃, the temperature for the treatment of dielectric heating oven turns down power, until frequency is increased to the 20kHz place, until temperature stabilization to 1300 ℃ and after being incubated 15min, the graphite probe is dropped to fusing covering slag liquid level below, start constant temperature viscosimetric program, begin to measure; During the alternating temperature viscosimetric, turn down power after the temperature of dielectric heating oven is increased to 1200 ℃, make heating furnace constant temperature 15min, after slag to be protected all melts, heighten gradually power, changing constant temperature is soaking condition, and the graphite probe is dropped to fusing covering slag liquid level below, start alternating temperature viscosimetric program, METHOD FOR CONTINUOUS DETERMINATION temperature-rise period medium viscosity changing value;
6. measure completely, the save data form is closed viscosity tester and dielectric heating oven;
7. take out graphite crucible, when the temperature for the treatment of dielectric heating oven is down to below 200 ℃, close chilled water.
8. last, according to data sheet, viscosity and the traditional rotary viscosity design determining result of covering slag under the high frequency magnetic field effect compared, draw the electromagnetic property of covering slag viscosity under 1300 ℃ of high frequency magnetic field conditions; Perhaps, according to alternating temperature viscosimetric data, with temperature (
t) be horizontal ordinate, viscosity (
η) be ordinate, do
η-
tCurve map draws the Changing Pattern that applies covering slag viscosity behind the high frequency magnetic field.
Measuring principle of the present invention is as follows:
With the jogging speed rotation, the slag generation internal friction with laminar flow properties causes suspension to produce a torsional angle to right cylinder in high-temperature liquid furnace slag
φAfter right cylinder rotated steadily in melt, the large young pathbreaker of its torsional angle kept constant substantially.The size of torsional angle and the angular velocity of self in the suspension elastic range
ω, slag viscosity
ηFollowing relation is arranged:
At angular velocity
ωIn certain situation, then have:
In the formula:
φ-suspension torsional angle;
ω-angular velocity; △
t-produce the time interval of suspension torsional angle.
η-melt viscosity;
K-instrument constant.
Can draw following relational expression by (1), (2), (3) formula:
Instrument constant
KAvailable known normal viscosity liquid is tested, and draws
KValue.Therefore, by measuring tested slag △ at a certain temperature
tValue can calculate its viscosity number.
Above-mentioned demonstration all is to suppose that suffered viscous moment is prerequisite from testing liquid all.But in fact owing to the viscous force of air and the internal friction of suspension material, even suspension also has certain reversing when idle running.This initial value can bring systematic error in measurement.For this reason, we must do it following correction:
In the formula:
t 0 Two signal intervals when-instrument rotates in air;
tTwo signal intervals when-instrument rotates in testing liquid.
Therefore, can test by the liquid to known-viscosity first, calibrate instrument constant
KThe value and
t 0 , again by the test testing liquid, draw corresponding
tBe worth, can draw at last the practical viscosity value of this testing liquid according to formula (5).
Beneficial effect of the present invention is: simple to operate, measure accurately, and with low cost and be beneficial to large quantity research, can study the viscosity characteristics of covering slag under the high frequency magnetic field effect, verify the metallurgical behavior of soft-contact electromagnetic continuous casting covering slag.
Description of drawings
Fig. 1 is embodiment of the invention structural representation;
Among the figure: 1-synchronous motor; 2-upper shadow shield; 3-lower shadow shield; 4-suspension; 5-upper light source; 6-upper photoelectric tube; 7-lower light source; 8-lower photoelectric tube; 9-universal joint; 10-molybdenum connecting link; 11-graphite probe; 12-graphite crucible; 13-inductive coil; 14-body of heater; 15-thermopair; 16-Control System of Microcomputer;
Fig. 2 be the present invention under experiment condition, measure embodiment one covering slag under the high frequency magnetic field effect with without under the magnetic field condition
η-
tCurve comparison figure;
Among the figure: under the effect of 11-high frequency magnetic field
η-
tCurve map; 12-without under the magnetic fields
η-
tCurve map;
Fig. 3 be the present invention under experiment condition, measure embodiment two covering slags under the high frequency magnetic field effect with without under the magnetic field condition
η-
tCurve comparison figure;
Among the figure: under the effect of 21-high frequency magnetic field
η-
tCurve map; 22-without under the magnetic fields
η-
tCurve map.
Embodiment
The present invention will be further described by the following examples.
The measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature, formed by dielectric heating oven and viscosity tester two parts, 4 circle water-cooled copper inductive coils are put in the body of heater 14 outer shroud windings of dielectric heating oven, viscosity tester comprises synchronous motor 1, optoelectronic switch, suspension 4, molybdenum connecting link 10, graphite probe 11, graphite crucible 12 and Control System of Microcomputer 16, the output terminal of synchronous motor connects suspension 4, molybdenum connecting link 10 and graphite probe 11 successively, the two ends of suspension 4 arrange respectively optoelectronic switch, and Control System of Microcomputer is control linkage synchronous motor and optoelectronic switch respectively; With the covering slag 300-350g to be measured graphite crucible 12 of after carbonization treatment, packing into, and put into the body of heater high-frequency heating, adopt the inner cylinder rotary process to carry out the measurement of covering slag viscosity electromagnetic property under the condition of high temperature.
Described dielectric heating oven, supporting high frequency electric source cabinet, high frequency output cabinet, control instrument cabinet, thermopair and the Displaying Meter of arranging, thermopair 15 is arranged on the bottom of body of heater 14, connects Displaying Meter, is used for the temperature value of Real-time Collection covering slag to be measured; The control instrument cabinet adopts the Totally integrated digital circuit, is used for output power, the concussion frequency parameter of Real-time Collection high-frequency heating body of heater, and has the manual adjustments power functions.
Four layers of water-cooled copper inductive coil 13 are put in the winding of described body of heater outer shroud, play heating furnace and the double action that high frequency magnetic field is provided, the high 100mm of burner hearth that 4 circle water-cooled copper inductive coils surround, diameter 80mm, its type of heating is induction heating, and the power supply oscillation frequency is 20KHz; Covering slag to be measured is positioned in the body of heater, heats and carry out viscosity measurement; The high frequency electric source cabinet adopts the IGBT power supply of widespread use in the modern power electronics technology, and it is little to have a driving power, and switching speed is fast, has again saturation pressure and reduces the advantage that output capacity is large; The high frequency output cabinet has overcurrent, overvoltage, lack of water, overtemperature, default-phase protection function, makes equipment security of operation, reliable.
Described synchronous motor rotates, and drives graphite probe 11 and rotates through suspension 4, molybdenum connecting link 10.
Described graphite crucible 12 wall thickness 6.5mm namely satisfy the constant temperature needs, satisfy again the intensification needs.
Described optoelectronic switch comprises shadow shield, light source and photoelectric tube, the two ends of suspension arrange respectively shadow shield 2 and lower shadow shield 3, the both sides of upper shadow shield arrange respectively light source 5 and upper photoelectric tube 6, and the both sides of lower shadow shield arrange respectively lower light source 7 and lower photoelectric tube 8.
The present invention also is provided with elevating mechanism, is comprised of stepper motor, bracing frame, cantilever and leading screw, and stepper motor and leading screw are installed on the bracing frame, and cantilever is fixed in the leading screw top, and stepper motor drives leading screw and moves up and down, and moves up and down thereby drive cantilever; Cantilever is connected with the graphite probe.
Also be provided with electrical control cabinet, have control main power switch function, set direction, the crawl that also is provided with simultaneously elevating mechanism starts, the failure reset button, and the synchronous motor shift knob; Control System of Microcomputer is equipped with a cover viscosity test experiment software, is provided with two kinds of test modes of constant temperature viscosimetric and alternating temperature viscosimetric, simultaneously, but on-line testing and the real-time experimental data of preserving.
Measuring method involved in the present invention, the implementation step is as follows:
1. the graphite crucible 12 of the covering slag 300-350g to be measured after carbonization treatment being packed into, and put it in the body of heater 14 of dielectric heating oven, dielectric heating oven opened, at inductive coil 13 interior logical high-frequency alternating currents, body of heater heat temperature raising;
2. after thermopair 15 probe temperatures reach 200 ℃, open chilled water;
3. open Control System of Microcomputer 16, two signal intervals when utilizing optoelectronic switch measurement viscosity tester in air, to rotate
t 0 , utilize standard oil testing tool constant
K, after the test passes, carry out
t 0 With
KValue is demarcated;
4. after covering slag melts fully in graphite crucible, manually measure liquid level position, mark down position at molybdenum connecting link 10;
5. during the constant temperature viscosimetric, treat to turn down when the high-frequency heating furnace temperature rises to 1250 ℃ power, until frequency is increased to 20kHz, until temperature stabilization to 1300 ℃ and after being incubated 15 minutes, viscosity tester is rotated to the body of heater top, click the decline button graphite probe 11 is dropped to fusing covering slag liquid level below, begin to measure, synchronous motor 1 starts, shadow shield 2 in the drive, suspension 4, lower shadow shield 3, molybdenum connecting link 10 and graphite probe 11 rotate together, measure the viscosity characteristics of covering slag to be measured under the high frequency magnetic field effect according to graphite probe 11 and the internal friction of the slag generation of laminar flow properties;
6. during the alternating temperature viscosimetric, turn down power after the temperature of dielectric heating oven is increased to 1200 ℃, make heating furnace constant temperature 15min, after slag to be protected all melts, heighten gradually power, changing constant temperature is soaking condition, and graphite probe 11 is dropped to fusing covering slag liquid level below, start alternating temperature viscosimetric program, METHOD FOR CONTINUOUS DETERMINATION temperature-rise period medium viscosity changing value;
7. measure complete after, save data takes out graphite crucible 12, closes viscosity tester and dielectric heating oven, closes chilled water when furnace temperature to be heated is down to below 200 ℃.
Amount to two embodiment; according to constant temperature viscosimetric experimental result; in the time of can drawing 1300 ℃ shown in the table 2 covering slag under the high frequency magnetic field effect with without the viscosity comparing result under the magnetic field condition; according to alternating temperature viscosimetric result, can draw Fig. 2 and covering slag shown in Figure 3 under the high frequency magnetic field effect with without under the magnetic field condition
η-
tCurve comparison figure.As can be seen from Table 2, covering slag viscosity is conventional without all rising to some extent under the magnetic field condition during lower 1300 ℃ of 20kHz high frequency magnetic field effect, wherein embodiment one covering slag viscosity rise 43%, embodiment two covering slag viscosity rises 52%.Fig. 2 and Fig. 3's
η-
tCurve can find out obviously that also the viscosity under the high frequency magnetic field effect is higher than without the viscosity under the magnetic field condition far away, and the electromagnetic property that covering slag viscosity under the condition of high temperature is described is that viscosity significantly increases, and its increase amplitude and covering slag composition have direct relation.
Utilize method of the present invention, under laboratory condition, two kinds of covering slags that composition is different are measured.The covering slag main chemical compositions is as shown in table 1.Covering slag was contrasting under the high frequency magnetic field effect with without the viscosity number under the magnetic field condition when table 2 was 1300 ℃.The present invention under experiment condition measured 1# and 2# covering slag under the high frequency magnetic field effect with without under the magnetic field condition
η-
tCurve comparison figure sees Fig. 2 and Fig. 3.Experimental verification, measuring method of the present invention is simple to operate, and is with low cost, and data are accurate, are convenient to research.
Claims (9)
1. the measurement mechanism of covering slag viscosity electromagnetic property under the condition of high temperature, it is characterized in that: formed by dielectric heating oven and viscosity tester two parts, multiturn water-cooled copper inductive coil is put in the body of heater of dielectric heating oven (14) outer shroud winding, viscosity tester comprises synchronous motor (1), optoelectronic switch, suspension (4), molybdenum connecting link (10), graphite probe (11), and graphite crucible (12) Control System of Microcomputer (16), the output terminal of synchronous motor connects suspension successively, molybdenum connecting link and graphite probe, the two ends of suspension arrange respectively optoelectronic switch, and Control System of Microcomputer is control linkage synchronous motor and optoelectronic switch respectively; With the covering slag to be measured graphite crucible (12) of after carbonization treatment, packing into, and put into body of heater (14) high-frequency heating, adopt the inner cylinder rotary process to carry out the measurement of covering slag viscosity electromagnetic property under the condition of high temperature.
2. the measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature according to claim 1 and 2, it is characterized in that described dielectric heating oven, supporting high frequency electric source cabinet, high frequency output cabinet, control instrument cabinet, thermopair and the Displaying Meter of arranging, thermopair (15) is arranged on the bottom of body of heater (14), connect Displaying Meter, be used for the temperature value of Real-time Collection covering slag to be measured; The control instrument cabinet adopts the Totally integrated digital circuit, is used for output power, the concussion frequency parameter of Real-time Collection high-frequency heating body of heater, and has the manual adjustments power functions.
3. the measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature according to claim 1; it is characterized in that the winding of described body of heater outer shroud puts 4 circle water-cooled copper inductive coils (13); the high 100mm of burner hearth; diameter 80mm; play heating furnace and the double action that high frequency magnetic field is provided; type of heating is induction heating, and the power supply oscillation frequency is 20KHz.
4. covering slag to be measured is positioned in the body of heater, heats and carry out viscosity measurement; The high frequency electric source cabinet adopts the IGBT power supply, and the high frequency output cabinet has overcurrent, overvoltage, lack of water, overtemperature, default-phase protection function.
5. the measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature according to claim 1 and 2 is characterized in that described synchronous motor rotates, and drives the graphite probe through suspension, molybdenum connecting link and rotates; Also be provided with elevating mechanism, be comprised of stepper motor, bracing frame, cantilever and leading screw, stepper motor and leading screw are installed on the bracing frame, and cantilever is fixed in the leading screw top, and stepper motor drives leading screw and moves up and down, and move up and down thereby drive cantilever; Cantilever is connected with the graphite probe.
6. the measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature according to claim 1 and 2,
It is characterized in that described graphite crucible (12) wall thickness is 6.5mm.
7. the measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature according to claim 1; it is characterized in that described optoelectronic switch comprises shadow shield, light source and photoelectric tube; the two ends of suspension arrange respectively shadow shield (2) and lower shadow shield (3); the both sides of upper shadow shield arrange respectively light source (5) and upper photoelectric tube (6), and the both sides of lower shadow shield arrange respectively lower light source (7) and lower photoelectric tube (8).
8. the measurement mechanism of covering slag viscosity electromagnetic property under a kind of condition of high temperature according to claim 1 and 2, it is characterized in that also being provided with electrical control cabinet, has control main power switch function, set direction, the crawl that also is provided with simultaneously elevating mechanism starts, the failure reset button, and the synchronous motor shift knob; Control System of Microcomputer is equipped with a cover viscosity test experiment software, is provided with two kinds of test modes of constant temperature viscosimetric and alternating temperature viscosimetric, simultaneously, but on-line testing and the real-time experimental data of preserving.
9. the measuring method of covering slag viscosity electromagnetic property under the condition of high temperature is characterized in that adopting the measurement mechanism of covering slag viscosity electromagnetic property under described any one condition of high temperature of claim 1 to 8 to operate, and comprises following steps:
The graphite crucible that 1. will install covering slag is put into the body of heater of dielectric heating oven, opens the dielectric heating oven switch, and regulating frequency is to 18kHz, stove heat temperature raising;
2. the furnace temperature for the treatment of dielectric heating oven rises to 200 ℃, opens chilled water;
3. demarcate the constant of viscosity tester
KThe value and
t 0 , utilize standard oil to test, demarcate;
4. after slag to be protected melts fully, manually measure liquid level, and fix at rotational viscosimeter molybdenum connecting link subscript and to fall the position;
5. viscosimetric analysis: during the constant temperature viscosimetric, when rising to 1250 ℃, the temperature for the treatment of dielectric heating oven turns down power, until frequency is increased to the 20kHz place, until temperature stabilization to 1300 ℃ and after being incubated 15min, the graphite probe is dropped to fusing covering slag liquid level below, start constant temperature viscosimetric program, begin to measure; During the alternating temperature viscosimetric, turn down power after the temperature of dielectric heating oven is increased to 1200 ℃, make heating furnace constant temperature 15min, after slag to be protected all melts, heighten gradually power, changing constant temperature is soaking condition, and the graphite probe is dropped to fusing covering slag liquid level below, start alternating temperature viscosimetric program, METHOD FOR CONTINUOUS DETERMINATION temperature-rise period medium viscosity changing value;
6. measure completely, the save data form is closed viscosity test and is taken into account dielectric heating oven, closes chilled water when furnace temperature to be heated is down to below 200 ℃;
7. last, according to data sheet, viscosity and the traditional rotary viscosity design determining result of covering slag under the high frequency magnetic field effect compared, draw the electromagnetic property of covering slag viscosity under 1300 ℃ of high frequency magnetic field conditions; Perhaps, according to alternating temperature viscosimetric data, with temperature (
t) be horizontal ordinate, viscosity (
η) be ordinate, do
η-
tCurve map, thus draw the Changing Pattern that applies covering slag viscosity behind the high frequency magnetic field.
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| CN105842120B (en) * | 2016-05-19 | 2019-01-22 | 山东大学 | Piping physical experiments medium viscosity continuous measuring device and method |
| CN109407020A (en) * | 2018-12-18 | 2019-03-01 | 中国工程物理研究院流体物理研究所 | A kind of magnetic axis measuring system of the solenoid coil based on suspension method |
| CN110108597A (en) * | 2019-05-10 | 2019-08-09 | 重庆科技学院 | A kind of multifunctional high-temperature Si-Mo rod boiler tube viscosimetric analysis system and method |
| CN110332801A (en) * | 2019-06-29 | 2019-10-15 | 浙江大学 | A kind of multifunctional high-temperature heating device having both online melt viscosity measurement and on-line monitoring |
| CN110548840A (en) * | 2019-10-09 | 2019-12-10 | 辽宁科技大学 | device and method for adding heated solid-state covering slag into crystallizer in continuous casting process |
| CN115808441A (en) * | 2023-02-08 | 2023-03-17 | 北京科技大学 | Device and method for testing heat transfer performance of metallurgical covering slag |
| CN112748047B (en) * | 2020-12-22 | 2023-09-12 | 青岛科技大学 | High-temperature high-pressure drilling fluid viscosity measuring device and measuring method thereof |
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Application publication date: 20130206 |