CN101004399A - Method and device for mensurating speed of melting protecting slag - Google Patents
Method and device for mensurating speed of melting protecting slag Download PDFInfo
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- CN101004399A CN101004399A CN 200610023413 CN200610023413A CN101004399A CN 101004399 A CN101004399 A CN 101004399A CN 200610023413 CN200610023413 CN 200610023413 CN 200610023413 A CN200610023413 A CN 200610023413A CN 101004399 A CN101004399 A CN 101004399A
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- covering slag
- burn
- rate
- slag
- porcelain boat
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- 239000002893 slag Substances 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002844 melting Methods 0.000 title abstract 4
- 230000008018 melting Effects 0.000 title abstract 4
- 229910052573 porcelain Inorganic materials 0.000 claims description 30
- 238000007499 fusion processing Methods 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 239000011449 brick Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract 4
- 239000012212 insulator Substances 0.000 abstract 1
- 238000009749 continuous casting Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000935974 Paralichthys dentatus Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010425 computer drawing Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical class NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
A method for determining a melting speed of protective slag includes obtaining time from electrode being inserted into insulator to holding resistance value of protective slag to be constant by measuring resistance value in melting course of protective slag then using obtained time as melting speed of protective slag. The device used for realizing said method is also disclosed.
Description
Technical field
The present invention relates to a kind of method and apparatus of measuring the covering slag burn-off rate.
Background technology
In process of production; covering slag is added on the continuous cast mold molten steel face; because the fusing point of covering slag is far below liquid steel temperature; be accompanied by the scaling loss of carbon materials in the covering slag; covering slag constantly melts; constantly flow into again between strand and the crystallizer between crack And taken away by strand, direct motion and slab quality that covering slag fusing and the reasonable coupling that consumes are produced continuous casting are extremely important, so the burn-off rate of continuous casting covering slag is the very important physical property of covering slag.
At present, the burn-off rate of mensuration covering slag has following certain methods:
1, porcelain boat method: different covering slags are respectively charged in the porcelain boat; putting into a high temperature furnace simultaneously keeps taking out behind the certain hour; observe the fusing situation, this method can only relatively different roughly covering slags between the difference of burn-off rate, can only be qualitative can not be quantitative.
2, patent of invention 200410025817.0 adopts the right cylinder method that the burn-off rate of covering slag is measured: the right cylinder sample of covering slag being made 3 * 3mm; and sample put into 1350 ℃ stove; observe and the record sample is put into stove to sample and is melt into time when hemispherical, the burn-off rate of the slag that can be protected.
This method makes the covering slag burn-off rate that the data of quantification arranged; multiple shapes such as that but covering slag has is Powdered, graininess, hollow spheres; this different form of covering slag is influential to the burn-off rate of covering slag on continuous cast mold molten steel face; and after with extrusion the covering slag of various different shapes being made the right cylinder sample of 3 * 3mm; just these original forms of covering slag have been destroyed, just ignored on the external morphology of covering slag influence burn-off rate.
3, utility model patent 02279034.9 has adopted a kind ofization slag device, utilizes this device to measure the change quantity of slag of unit area (crucible floorage), unit interval, and with this as its burn-off rate.Concrete grammar is: with the covering slag crucible of packing into, covering slag at high temperature melts, and flows out by the excessive cinder hole on the sidewall of crucible when slag reach a certain height in the crucible, and the high-temperature slag of outflow is collected by special gathering-device, and carries out weighing.
The advantage of this method is to destroy the virgin state of covering slag; but the complex structure of its proving installation; sample size is big; fire resistive materials such as the heat-conducting plate in the device, slag plate washer under 1500 ℃ high temperature very easily by slag corrosion; clinker hole, the cinder hole that overflows also can be subjected to alteration shape; therefore this method audient face is little, is not suitable for conventionally test.
Summary of the invention
The object of the present invention is to provide a kind of method and apparatus of measuring the covering slag burn-off rate, complete fusing time with a certain amount of continuous casting covering slag is the burn-off rate index, utilize the actual burn-off rate of the more different covering slags of this index in continuous cast mold, easy to operate, and measure the burn-off rate characteristic that the data that obtain can be described different covering slags quantitatively; Measuring equipment is simple in structure, maintainable strong simultaneously.
For achieving the above object, the present invention at first provides a kind of method of measuring the covering slag burn-off rate, and it comprises following steps:
Step 1, the porcelain boat of a certain amount of covering slag will be housed, promptly crucible is put into high temperature furnace;
Step 4, by the complete fusing time of calculating the slag that is protected in the resistance-time curve in the covering slag fusion process of computing machine record, as the burn-off rate index of this covering slag, demarcate burn-off rate into covering slag.
In the step 1, the temperature of described high temperature furnace 〉=1350 ℃.
In the step 3, the fusion process of described covering slag is: insert porcelain boat from electrode, the carbon materials in covering slag takes fire, and covering slag sintering, softening gradually finally all melts until covering slag then.
In the step 4; the complete fusing time of described covering slag is meant: the resistance value from electrode insertion porcelain boat to covering slag is held constant at the time of ending, and just the initial moment in the resistance-time curve of computer recording is to the covering slag resistance value trend constant profile constantly required time of flex point.
The method of mensuration covering slag burn-off rate provided by the invention; when electrode just inserted porcelain boat, the resistance value of covering slag was very big, but along with covering slag gradually sintering, softening, after whole fusings; the resistance value of covering slag can reduce gradually, until being a small constant value.
The method of mensuration covering slag burn-off rate provided by the invention; complete fusing time with a certain amount of continuous casting covering slag is the burn-off rate index; utilize the actual burn-off rate of the more different covering slags of this index in continuous cast mold; easy to operate, and measure the burn-off rate characteristic that the data that obtain can be described different covering slags quantitatively.
The invention provides a kind of device of measuring the covering slag burn-off rate, it comprises heating arrangement and measurement mechanism;
Described heating arrangement comprises the porcelain boat that is used to load covering slag, i.e. crucible and high temperature furnace;
Described porcelain boat is placed in the high temperature furnace, and it is made by aluminium oxide;
Described high temperature furnace inwall is provided with bosh brick, and it is made by high-temperature flame-proof village material, and this bosh brick outside is provided with heater uniformly, to providing thermal source in the high temperature furnace, the intensification constant temperature method of control high temperature furnace;
Described measurement mechanism comprises the tinsel that connects successively, resistance apparatus and computing machine;
Described tinsel is 2, as the covering slag bottom in the positive and negative electrode insertion porcelain boat;
Further, the device of this mensuration covering slag burn-off rate also comprises a jacking gear, and its control and fixing metal silk insert the covering slag bottom in the porcelain boat.
After the test beginning, resistance apparatus measures the resistance value of covering slag by connection wiry, and with its input computing machine; Computing machine will be corresponding with the time the resistance value of covering slag note, and be depicted as resistance-time curve in the whole fusion process of covering slag, promptly the covering slag burn-off rate is measured curve, calculates the complete fusing time of covering slag thus.
The device of mensuration covering slag burn-off rate provided by the invention, simple in structure, equipment is maintainable strong, applied widely.
Description of drawings
Fig. 1 is the structural representation of the device of mensuration covering slag burn-off rate provided by the invention;
Fig. 2 is that the covering slag burn-off rate is measured curve in the embodiments of the invention.
Embodiment
Below in conjunction with Fig. 1～Fig. 2, describe an embodiment of the present invention in detail:
As shown in Figure 1, be the structural representation of the device of mensuration covering slag burn-off rate provided by the invention, it comprises heating arrangement and measurement mechanism;
Described heating arrangement comprises the porcelain boat 1 that is used to load covering slag sample 2, i.e. crucible and high temperature furnace;
Described porcelain boat 1 is placed in the high temperature furnace, and it is made by aluminium oxide;
Described high temperature furnace inwall is provided with bosh brick 4, and it is made by high-temperature flame-proof village material, and these bosh brick 4 outsides are provided with heater 3 uniformly, to providing thermal source in the high temperature furnace, the intensification constant temperature method of control high temperature furnace;
Described measurement mechanism comprises the tinsel 5 that connects successively, resistance apparatus 7 and computing machine 8;
Described tinsel 5 inserts the bottom of the covering slag 2 in the porcelain boat 1 as electrode;
Further, the device of this mensuration covering slag burn-off rate also comprises a jacking gear 6, the bottom that its control and fixing metal silk 5 insert the covering slag 2 in the porcelain boat 1.
Below, the method for mensuration covering slag burn-off rate provided by the invention is described by a specific embodiment:
Weighing 10 gram continuous casting covering slags no matter be hollow spheres, or granular, or pulverous, all keep its intrinsic virgin state to pack in the porcelain boat 1; High temperature furnace is warming up to a certain temperature in 1300 ℃～1500 ℃, and constant temperature, constant temperature time is not less than 1 hour;
To covering slag be housed, and be of a size of 30 * 30 * 20mm, the porcelain boat 1 of wall thickness 2mm when putting into high temperature furnace, by shaking jacking gear 6, descends 2 one metal wires 5 of measuring the resistance value of covering slag 2 and inserts in the porcelain boat 1 as electrode; Used tinsel 5 is the nickel filament of 2mm, and the spacing of two one metal wires 5 is 8mm;
Resistance measuring instrument 7 (model: FLUKE HYDRA SERIES II) and computing machine 8 start working simultaneously, observe the resistance data that measures of computing machine 8 records, when the resistance value of the slag in the porcelain boat 1 is constant, end of test (EOT);
Shaking jacking gear 6 makes tinsel 5 upwards extract porcelain boat 1 out; computing machine 8 stops to accept data; covering slag burn-off rate according to computer drawing is measured curve; it is the resistance-time curve in the covering slag fusion process; as shown in Figure 2, calculate tinsel 5 and insert 1 of the porcelain boat time till the stable flex point of the resistance trend that records, count the complete fusing time of covering slag; its demarcation is that the burn-off rate of covering slag, unit are second.
Table 1 has shown and has adopted the test result of method and apparatus of the present invention to the burn-off rate of 3 kinds of covering slags:
| Covering slag principal ingredient and performance | Covering slag 1 | |
|
|
| Composition % | CaO | 34.5 | 30.8 | 35.1 |
| SiO 2 | 36.9 | 33.4 | 35.8 | |
| Al 2O 3 | 3.5 | 10.9 | 4.9 | |
| Na 2O | 11.1 | 5.3 | 11.2 | |
| F | 5.8 | 5.5 | 7.0 | |
| Tc | 3.3 | 13.3 | 3.0 | |
| Fc | 2.5 | 10.6 | 1.8 | |
| Performance | Fusing point (℃) | 1009 | 1193 | 1082 |
| Viscosity (1300 ℃, P a.S) | 0.23 | 0.73 | 0.30 | |
| Burn-off rate (second) | 149 | 305 | 121 | |
The test result of table 1, various covering slag burn-off rates
The burn-off rate of three covering slags from table 1 as can be seen, the uncombined carbon F in the main and covering slag of the burn-off rate of continuous casting covering slag
cRelevant, the correlation theory of this and covering slag is consistent.Above-mentioned three samples are respectively charged into porcelain boat 1, put into folk prescription simultaneously to heating furnace, the ordering of the fusing time of Pan Duaning with the naked eye is identical with the test result shown in the table 1.
The method of mensuration covering slag burn-off rate provided by the invention; complete fusing time with a certain amount of continuous casting covering slag is the burn-off rate index; utilize the actual burn-off rate of the more different covering slags of this index in continuous cast mold; easy to operate, and measure the burn-off rate characteristic that the data that obtain can be described different covering slags quantitatively.
The device of mensuration covering slag burn-off rate provided by the invention, simple in structure, equipment is maintainable strong, applied widely.
Claims (9)
1. method of measuring the covering slag burn-off rate is characterised in that it comprises following steps:
Step 1, the porcelain boat (1) that a certain amount of covering slag (2) will be housed are put into high temperature furnace;
Step 2, in porcelain boat (1), insert two wire electrodes (5) that connect resistance measuring instrument (7) respectively, and this resistance measuring instrument (7) is connected with computing machine (8);
Step 3, in the fusion process of whole protecting slag, the resistance value of resistance measuring instrument (7) test constantly covering slag (2), and all import computing machine (8) record, the resistance-time curve in the slag fusion process that is protected;
Step 4, by the complete fusing time of calculating the slag that is protected in the resistance-time curve in the covering slag fusion process of computing machine (8) record, as the burn-off rate index of this covering slag, demarcate burn-off rate into covering slag.
2. the method for mensuration covering slag burn-off rate as claimed in claim 1 is characterized in that, in the step 1, and the temperature of described high temperature furnace 〉=1350 ℃.
3. the method for mensuration covering slag burn-off rate as claimed in claim 1; it is characterized in that; in the step 3; the fusion process of described covering slag is: insert porcelain boat (1) from wire electrode (5); carbon materials in covering slag (2) takes fire; covering slag (2) sintering, softening gradually then is finally until all fusings of covering slag (2).
4. the method for mensuration covering slag burn-off rate as claimed in claim 1; it is characterized in that; in the step 4; the complete fusing time of described covering slag (2) is meant: the resistance value from wire electrode (5) insertion porcelain boat (1) to covering slag (2) is held constant at the time of ending, and just the initial moment in the resistance-time curve of computing machine (8) record is to the covering slag resistance value trend constant profile constantly required time of flex point.
5. a device of measuring the covering slag burn-off rate is characterised in that, it comprises heating arrangement and measurement mechanism:
Described heating arrangement comprises porcelain boat (1) and the high temperature furnace that is used to load covering slag sample (2);
Described measurement mechanism comprises 2 one metal wires (5) that connect successively, resistance apparatus (7) and computing machine (8);
Described 2 one metal wires (5) insert the bottom of the covering slag (2) in the porcelain boat (1) as positive and negative electrode.
6. the device of mensuration covering slag burn-off rate as claimed in claim 5 is characterized in that, described porcelain boat (1) is placed in the high temperature furnace, is made by aluminium oxide.
7. the device of mensuration covering slag burn-off rate as claimed in claim 5 is characterized in that, described high temperature furnace inwall is provided with bosh brick (4), and this bosh brick (4) is made by high-temperature flame-proof village material.
8. the device of mensuration covering slag burn-off rate as claimed in claim 7 is characterized in that, the outside of described bosh brick (4) is provided with heater (3) uniformly, and this heater (3) is to providing thermal source, the intensification constant temperature method of control high temperature furnace in the high temperature furnace.
9. the device of mensuration covering slag burn-off rate as claimed in claim 5 is characterized in that also comprising a jacking gear (6), its control and fixing metal silk (5), the bottom of tinsel (5) being inserted the covering slag (2) in the porcelain boat (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100234137A CN100547397C (en) | 2006-01-18 | 2006-01-18 | A kind of method and apparatus of measuring the covering slag burn-off rate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100234137A CN100547397C (en) | 2006-01-18 | 2006-01-18 | A kind of method and apparatus of measuring the covering slag burn-off rate |
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| CN101004399A true CN101004399A (en) | 2007-07-25 |
| CN100547397C CN100547397C (en) | 2009-10-07 |
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| CNB2006100234137A Expired - Fee Related CN100547397C (en) | 2006-01-18 | 2006-01-18 | A kind of method and apparatus of measuring the covering slag burn-off rate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507637A (en) * | 2011-09-28 | 2012-06-20 | 中南大学 | Device for simulating and measuring heat flux of continuous casting covering slag |
| CN103063537A (en) * | 2013-01-17 | 2013-04-24 | 武钢集团昆明钢铁股份有限公司 | Method for measuring melting speed of continuous casting covering slag |
| CN107422140A (en) * | 2017-07-07 | 2017-12-01 | 西安交通大学 | A kind of high temperature melting compound velocity measuring system and method |
| CN107589304A (en) * | 2017-09-06 | 2018-01-16 | 蚌埠玻璃工业设计研究院 | A kind of method of testing of glass melt high-temperature resistivity |
| CN108007961A (en) * | 2017-08-09 | 2018-05-08 | 安徽工业大学 | A kind of method that Iron Ore Powder assimilation temperature is judged based on change in electric |
| CN108007959A (en) * | 2017-08-09 | 2018-05-08 | 安徽工业大学 | A kind of method based on Iron Ore Powder temperature-electric signal curve detection assimilation temperature |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7713407A (en) * | 1976-12-16 | 1978-06-20 | Rohm & Haas | PROCESS FOR PREPARING MOLDING MIXTURES BASED ON ACRYLIC POLYMER. |
| JPH11349719A (en) * | 1998-06-04 | 1999-12-21 | Sumitomo Chem Co Ltd | Elastomer composition for powder molding |
| CN2572401Y (en) * | 2002-09-04 | 2003-09-10 | 武汉钢铁(集团)公司 | Protective slag smelting speed tester |
| CN1556401A (en) * | 2004-01-06 | 2004-12-22 | 青海大学 | Special steel protective slag fusion point, fusion speed full fluorine analysis technology |
| CN100380110C (en) * | 2004-04-29 | 2008-04-09 | 宝山钢铁股份有限公司 | Method for detecting speed of melting of protecting slag |
-
2006
- 2006-01-18 CN CNB2006100234137A patent/CN100547397C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507637A (en) * | 2011-09-28 | 2012-06-20 | 中南大学 | Device for simulating and measuring heat flux of continuous casting covering slag |
| CN103063537A (en) * | 2013-01-17 | 2013-04-24 | 武钢集团昆明钢铁股份有限公司 | Method for measuring melting speed of continuous casting covering slag |
| CN107422140A (en) * | 2017-07-07 | 2017-12-01 | 西安交通大学 | A kind of high temperature melting compound velocity measuring system and method |
| CN107422140B (en) * | 2017-07-07 | 2018-11-23 | 西安交通大学 | A kind of high temperature melting compound velocity measuring system and method |
| CN108007961A (en) * | 2017-08-09 | 2018-05-08 | 安徽工业大学 | A kind of method that Iron Ore Powder assimilation temperature is judged based on change in electric |
| CN108007959A (en) * | 2017-08-09 | 2018-05-08 | 安徽工业大学 | A kind of method based on Iron Ore Powder temperature-electric signal curve detection assimilation temperature |
| CN108007961B (en) * | 2017-08-09 | 2020-02-14 | 安徽工业大学 | Method for judging iron ore powder assimilation temperature based on electric signal change |
| CN107589304A (en) * | 2017-09-06 | 2018-01-16 | 蚌埠玻璃工业设计研究院 | A kind of method of testing of glass melt high-temperature resistivity |
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| CN100547397C (en) | 2009-10-07 |
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