CN107356624A - Judge the method for crystallizer protecting residue burn-off rate - Google Patents
Judge the method for crystallizer protecting residue burn-off rate Download PDFInfo
- Publication number
- CN107356624A CN107356624A CN201710396245.4A CN201710396245A CN107356624A CN 107356624 A CN107356624 A CN 107356624A CN 201710396245 A CN201710396245 A CN 201710396245A CN 107356624 A CN107356624 A CN 107356624A
- Authority
- CN
- China
- Prior art keywords
- rate
- burn
- standard specimen
- specimen
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of method for judging crystallizer protecting residue burn-off rate, including：Covering slag slag specimen is ground, is reconciled with dextrin liquid, is fabricated to triangular pyramidal standard specimen；Using rectangular pate dure pad, pate dure pad is provided with triangular prism groove, and the floor space of triangular prism groove is identical with the floor space of triangular pyramidal standard specimen, and triangular pyramidal standard specimen is placed in triangular prism groove, and pate dure pad and triangular pyramidal standard specimen are dried；Pate dure pad, triangular pyramidal standard specimen are put into ash fusion point tester, its burn-off rate are measured using ash fusion point tester, judges its burn-off rate by analyzing its time in heating process corresponding to sample change in shape feature.The present invention can be accurately judged to be added to covering slag burn-off rate on crystallizer molten steel surface, and test temperature judges visual phenomenon, reappearance significantly improves closer to produce reality.
Description
Technical field
The present invention relates to a kind of tendency of mould powder technology for CC, specifically, is related to a kind of judgement crystallizer protecting residue burn-off rate
Method.
Background technology
In continuous casting production process, the physicochemical property of crystallizer protecting residue directly affects the steady production and strand of continuous casting
Quality and yield, the covering slag being added in crystallizer must have suitable physicochemical property can just give full play to its five Daye
Golden function：Covering and heat insulating, prevent secondary oxidation, absorption to be mingled with, lubrication is played between crystallizer and strand and improves crystallizer
Heat transfer between strand.One of most important physicochemical property of covering slag is just incorporated into the burn-off rate of covering slag in crystallizer,
It is to judge covering slag to provide melt cinder amount how many important indicators, influences to be related to the thickness of liquid slag layer and the consumption of slag.
Molten speed is too fast, causes slag layer disappearance speed fast, influences the heat insulation effect of slag, also melt cinder is crusted, can cause strand table
Face slag inclusion；Molten speed is excessively slow, can make it that liquid slag layer is excessively thin, easily cause bleed-out accident.Whether covering slag burn-off rate is suitable, directly
Have influence on liquid slag layer thin and thick and casting blank shell growth it is whether uniform, rational burn-off rate can give full play to each of covering slag
Item metallurgical function.
At present the method for testing that generally uses for：Crucible method of testing, molten drop method of testing, slag post method of testing etc..These methods
There is certain limitation in the application of reality, because method of testing is different, measurement result is also had very big difference,
By analyzing the feature and its limitation of existing various burn-off rate method of testings, R and D can more react covering slag reality
The assay method of the burn-off rate of melting conditions is necessary.
Slag post method of testing strikes out sample the small column of certain size, inserts in the burner hearth of design temperature, observes sample
From starting to be heated to complete slump duration, the temperature for testing fusing is generally 1300 DEG C, is the characteristics of this method:
Specimen shape specification, visual phenomenon is time-consuming short, easy to operate, but during Specimen Determination, because operation is different, the weight of standard specimen
Amount has differences, and sample pad is plane, reaches the covering slag fusing more difficult judgement of shape of measure terminal, subjective operation factors shadow
Sound is larger, and test error is larger, and reappearance is low.
Application No. 201310017290.6, a kind of patent text of entitled assay method of Mold Powder Melting Rate
Offer, be soon completely melt, to record terminal time, to cool and isolate the covering slag of fusing with covering slag in crucible, according to fusing speed
Spend formula VR=MR104/ (tA) (10-3kg/sm2) and calculate burn-off rate, MR is the covering slag weight of fusing.The party
Following defect be present in method：1. melt portions are separated from the covering slag after cooling, it is troublesome in poeration；2. it is condensed out by sieving separation
The glass dregs come, these glass dregs are easily mingled with unfused covering slag during condensation separation, in unfused covering slag, easily
The small glass dregs of granularity are mixed into, are all also easy to produce larger error；3. due to being soon completely melt as record with covering slag in crucible
, there is subjective human error in terminal, experiment reappearance is bad, it is impossible to influence caused by overcoming error by test of many times.Compare
The error caused by existing method, this method is bigger.
Application No. 200410018064.0, the patent document of the detection method of entitled covering slag burn-off rate, passes through
The scaling loss situation of free carbon reacts the burn-off rate of covering slag in detection covering slag, by computer balance data is adopted
Sample, many laboratories do not reach such experimental condition also, and this method also needs to buy instrument to realize measure.
The content of the invention
Technical problem solved by the invention is to provide a kind of method for judging crystallizer protecting residue burn-off rate, can be accurate
Judge to be added to covering slag burn-off rate on crystallizer molten steel surface, test temperature judges that phenomenon is straight closer to produce reality
See, reappearance significantly improves.
Technical scheme is as follows：
A kind of method for judging crystallizer protecting residue burn-off rate, including：
Covering slag slag specimen is ground, is reconciled with dextrin liquid, is fabricated to triangular pyramidal standard specimen；
Using rectangular pate dure pad, pate dure pad is provided with triangular prism groove, the floor space of triangular prism groove
It is identical with the floor space of triangular pyramidal standard specimen, triangular pyramidal standard specimen is placed in triangular prism groove, by pate dure pad and triangle
Taper standard specimen is dried；
Pate dure pad, triangular pyramidal standard specimen are put into ash fusion point tester, speed is melted to it using ash fusion point tester
Degree is measured, and judges its burn-off rate by analyzing its time in heating process corresponding to sample change in shape feature.
Further：The pate dure pad, the triangular pyramidal standard specimen that are baked are put into rapidly on the zone of constant temperature in stove, start to count
When, in the case where temperature is constant, observation standard specimen is completely melt the required time；Specimen shape variation characteristic is observed, works as standard specimen
When being completely melt slump levelling, timing is finished, and the burn-off rate of covering slag slag specimen is obtained according to the time used.
Further：Ash fusion point tester is heated up, when temperature is raised to 1350 DEG C, constant temperature 5 minutes；
Further：Specimen shape variation characteristic is observed, is completely melt to flow into groove as measure terminal using covering slag, when three
Pyramid standard specimen is completely melt that slump is flowed into triangular prism groove, and when liquid level is equal with high-temperature gasket plane, timing finishes,
Time used is the burn-off rate of crystallizer protecting residue.
Further：Repeated melting, average, the burn-off rate of covering slag slag specimen.
Further：0.5 gram of the covering slag of crystallizer is taken, is reconciled with dextrin liquid, dextrin in dextrin liquid：Water=3：1, using special
With sample preparation device, triangular pyramidal standard specimen is fabricated to.
Further：The high 2mm of triangular prism groove, it is 200 DEG C that pate dure pad, triangular pyramidal standard specimen are put into temperature together
Drying in oven 2 hours.
Compared with prior art, the technology of the present invention effect includes：
In the present invention, because standard specimen is triangular pyramid type, using with reeded high-temperature gasket, it melts levelling at high temperature
Shape is more directly perceived, while introduces the quantitative concept of covering slag, and test temperature is warm closer to produce reality, constant temperature bandwidth
Drop small, overcome that sample in conventional method of testing is small, furnace temperature is low, temperature drop is fast, the bad judgement of molten complete shape and standard specimen weight be unstable
Influence factor, judge visual phenomenon, reappearance significantly improves, and being not required to calculate just can directly and accurately test out crystallizer protection
The burn-off rate of slag, operation is more fast and convenient, and the reliability of judged result is higher, and rectangle pate dure pad with groove
It is reusable, detection material is saved, reduces cost.
In continuous casting production process, crystallizer protecting residue is essential auxiliary material, and its performance directly affects continuous casting
Direct motion and cc billet surface quality are produced, feasibility of the present invention is strong, simple to operate, can correctly and comprehensively judge that crystallizer is protected
The burn-off rate of slag, there is important directive function to produced on-site crystallizer protecting residue, there is vast potential for future development.
In casting process, by the implementation comparative analysis of this method, crystallizer protecting residue can accurately and be comprehensively judged
Burn-off rate, so as to judge that it is used if appropriate in continuous casting, avoid due to crystallizer protecting residue meltdown property
The generation of surface defect of bloom caused by discomfort and bonding steel leakage accident, there is larger economic benefit.
Embodiment
Technical solution of the present invention is elaborated below with reference to example embodiment.However, example embodiment can
Implement in a variety of forms, and be not understood as limited to embodiment set forth herein；On the contrary, these embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively communicated to those skilled in the art by the present invention.
In continuous casting production process, crystallizer protecting residue is a kind of essential auxiliary material, is appropriately determined crystallizer
The burn-off rate of covering slag is the important measures that stable casting improves slab quality.
Judge the method for crystallizer protecting residue burn-off rate, comprise the following steps that：
Step 1：Covering slag slag specimen is ground, is reconciled with dextrin liquid, is fabricated to triangular pyramidal standard specimen；
0.5 gram of the covering slag of crystallizer is taken, with dextrin liquid (dextrin：Water=3：1) reconcile, using special sample preparation device, make
Into triangular pyramidal standard specimen.
Step 2：Using rectangular pate dure pad, pate dure pad is provided with triangular prism groove, triangular prism groove
Floor space is identical with the floor space of triangular pyramidal standard specimen, and triangular pyramidal standard specimen is placed in triangular prism groove, by pate dure pad
Dried with triangular pyramidal standard specimen；
The high 2mm of triangular prism groove, triangular pyramidal standard specimen is placed in the triangular prism groove on pad, being put into temperature together is
200 DEG C of drying in oven 2 hours.
Step 3：Pate dure pad, triangular pyramidal standard specimen are put into ash fusion point tester, using ash fusion point tester to it
Burn-off rate is measured, and judges its fusing by analyzing its time in heating process corresponding to sample change in shape feature
Speed.
Step 31：Ash fusion point tester is heated up, when temperature is raised to 1350 DEG C, constant temperature 5 minutes；
Step 32：The pate dure pad, the triangular pyramidal standard specimen that are baked are put into rapidly on the zone of constant temperature in stove, start to count
When, in the case where temperature is constant, observation standard specimen is completely melt the required time；
Step 33：Specimen shape variation characteristic is observed, when standard specimen is completely melt slump levelling, timing finishes, according to institute
Time obtains the burn-off rate of covering slag slag specimen.
Specimen shape variation characteristic is observed, is completely melt to flow into groove as measure terminal using covering slag, works as triangular pyramidal
Standard specimen is completely melt that slump is flowed into triangular prism groove, and when liquid level is equal with high-temperature gasket plane, timing finishes, used
Time is the burn-off rate of crystallizer protecting residue, unit is the second " S ", judges the fast of crystallizer protecting residue burn-off rate with this
Slowly.
Step 4：Repeat step 3 three times, is averaged, as burn-off rate of the covering slag slag specimen under the conditions of 1350 DEG C.
Embodiment 1
Fetch protection slag slag specimen A, its chemical composition and physical property such as table 1 below：
By covering slag slag specimen A, using above-mentioned specific determination step, the three sample burn-off rates measured simultaneously calculate to obtain each group
Average value, its burn-off rate are as shown in table 2 below:
| Specimen coding | Fusing time (second) |
| 1 | 119 |
| 2 | 118 |
| 3 | 117 |
| It is average | 118 |
Embodiment 2
Fetch protection slag slag specimen B, its chemical composition and physical property such as table 3 below：
By covering slag slag specimen B, using above-mentioned specific determination step, the three sample burn-off rates measured simultaneously calculate to obtain each group
Average value, its burn-off rate are as shown in table 4 below:
Embodiment 3
Fetch protection slag slag specimen C, its chemical composition and physical property such as table 5 below：
By covering slag slag specimen C, using above-mentioned specific determination step, the three sample burn-off rates measured simultaneously calculate to obtain each group
Average value, its burn-off rate are as shown in table 6 below:
| Specimen coding | Fusing time (second) |
| 1 | 72 |
| 2 | 71 |
| 3 | 70 |
| It is average | 71 |
Term used herein is explanation and exemplary and nonrestrictive term.Because the present invention can be with a variety of
Form specific implementation without departing from the spiritual or substantive of invention, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and should widely being explained in the spirit and scope that appended claims are limited, thus fall into claim or its etc.
Whole changes and remodeling in the range of effect all should be appended claims and covered.
Claims (7)
1. a kind of method for judging crystallizer protecting residue burn-off rate, including：
Covering slag slag specimen is ground, is reconciled with dextrin liquid, is fabricated to triangular pyramidal standard specimen；
Using rectangular pate dure pad, pate dure pad is provided with triangular prism groove, the floor space of triangular prism groove and three
The floor space of pyramid standard specimen is identical, and triangular pyramidal standard specimen is placed in triangular prism groove, by pate dure pad and triangular pyramidal
Standard specimen is dried；
Pate dure pad, triangular pyramidal standard specimen are put into ash fusion point tester, its burn-off rate entered using ash fusion point tester
Row measure, judges its burn-off rate by analyzing its time in heating process corresponding to sample change in shape feature.
2. the method for crystallizer protecting residue burn-off rate is judged as claimed in claim 1, it is characterised in that：The pate dure being baked
Pad, triangular pyramidal standard specimen are put into rapidly on the zone of constant temperature in stove, start timing, in the case where temperature is constant, observe standard specimen
It is completely melt the required time；Specimen shape variation characteristic is observed, when standard specimen is completely melt slump levelling, timing finishes, root
The burn-off rate of covering slag slag specimen is obtained according to the time used.
3. the method for crystallizer protecting residue burn-off rate is judged as claimed in claim 2, it is characterised in that：By ash fusion point tester
Heating, when temperature is raised to 1350 DEG C, constant temperature 5 minutes.
4. the method for crystallizer protecting residue burn-off rate is judged as claimed in claim 2, it is characterised in that：Specimen shape is observed to become
Change feature, be completely melt to flow into groove as measure terminal using covering slag, when triangular pyramidal standard specimen is completely melt that slump flows into three
In corner post groove, and when liquid level is equal with high-temperature gasket plane, timing finishes, and the time used is crystallizer protecting residue
Burn-off rate.
5. the method for crystallizer protecting residue burn-off rate is judged as claimed in claim 2, it is characterised in that：Repeated melting, make even
Average, the burn-off rate of covering slag slag specimen.
6. the method for crystallizer protecting residue burn-off rate is judged as claimed in claim 1, it is characterised in that：Take the protection of crystallizer
0.5 gram of slag, reconciled with dextrin liquid, dextrin in dextrin liquid：Water=3：1, using special sample preparation device, it is fabricated to triangular pyramidal standard specimen.
7. the method for crystallizer protecting residue burn-off rate is judged as claimed in claim 1, it is characterised in that：Triangular prism groove is high
2mm, pate dure pad, triangular pyramidal standard specimen are put into the drying in oven 2 hours that temperature is 200 DEG C together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710396245.4A CN107356624B (en) | 2017-05-27 | 2017-05-27 | Method for judging melting speed of crystallizer covering slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710396245.4A CN107356624B (en) | 2017-05-27 | 2017-05-27 | Method for judging melting speed of crystallizer covering slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107356624A true CN107356624A (en) | 2017-11-17 |
| CN107356624B CN107356624B (en) | 2020-06-16 |
Family
ID=60272103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710396245.4A Withdrawn - After Issue CN107356624B (en) | 2017-05-27 | 2017-05-27 | Method for judging melting speed of crystallizer covering slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107356624B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346159A (en) * | 2011-09-10 | 2012-02-08 | 内蒙古包钢钢联股份有限公司 | Method for testing melting speed of continuous casting powder |
| CN102721718A (en) * | 2012-06-11 | 2012-10-10 | 内蒙古包钢钢联股份有限公司 | Method for judging heat transfer property of liquid-state protecting slag in crystallizer |
| 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 |
| CN103792251A (en) * | 2013-10-19 | 2014-05-14 | 河南通宇冶材集团有限公司 | Method for measuring melting rate of covering slag |
| CN204214800U (en) * | 2014-07-11 | 2015-03-18 | 西峡县新越冶金材料开发有限公司 | A kind of covering slag burn-off rate proving installation |
-
2017
- 2017-05-27 CN CN201710396245.4A patent/CN107356624B/en not_active Withdrawn - After Issue
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346159A (en) * | 2011-09-10 | 2012-02-08 | 内蒙古包钢钢联股份有限公司 | Method for testing melting speed of continuous casting powder |
| CN102721718A (en) * | 2012-06-11 | 2012-10-10 | 内蒙古包钢钢联股份有限公司 | Method for judging heat transfer property of liquid-state protecting slag in crystallizer |
| 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 |
| CN103792251A (en) * | 2013-10-19 | 2014-05-14 | 河南通宇冶材集团有限公司 | Method for measuring melting rate of covering slag |
| CN204214800U (en) * | 2014-07-11 | 2015-03-18 | 西峡县新越冶金材料开发有限公司 | A kind of covering slag burn-off rate proving installation |
Non-Patent Citations (2)
| Title |
|---|
| 智建国等: "结晶器保护渣熔化速度测定方法的研究", 《耐火材料》 * |
| 李殿明: "《连铸结晶器保护渣应用技术》", 30 April 2008, 冶金工业出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107356624B (en) | 2020-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104407007A (en) | Method for determining melting temperature interval and melting behavior of metallurgical slag | |
| CN103235001B (en) | Steel solidus-liquidus temperature measurement method | |
| CN110018195B (en) | Method for nondestructively representing heat transfer performance of covering slag film | |
| Wen et al. | Simulation and characterization on heat transfer through mould slag film | |
| CN104458497A (en) | Method for judging high-temperature flow property of casting powder of crystallizer | |
| CN102721718B (en) | Method for judging heat transfer property of liquid-state protecting slag in crystallizer | |
| CN105445138A (en) | Slag actual ingredient performance detection method for slag containing volatile components | |
| CN102346159A (en) | Method for testing melting speed of continuous casting powder | |
| CN100547397C (en) | A kind of method and apparatus of measuring the covering slag burn-off rate | |
| CN107356624A (en) | Judge the method for crystallizer protecting residue burn-off rate | |
| Łabaj et al. | Surface tension of expanded slag from steel manufacturing in electrical furnace | |
| CN102192922A (en) | Heat conductivity coefficient measuring device for high temperature material | |
| Venturelli | Heating microscopy and its applications | |
| CN107589304A (en) | A kind of method of testing of glass melt high-temperature resistivity | |
| CN102645446B (en) | Online detection method of grain refinement and metamorphism effect of aluminum alloy melt | |
| CN107607573B (en) | Novel method for predicting hot cracking tendency of alloy | |
| EP3693099A1 (en) | Gypsum-based investment material composition for casting, and method for manufacturing gypsum-based investment material composition for casting | |
| Su-sen et al. | Monitoring method for blast furnace wall with copper staves | |
| WO2017079390A1 (en) | Determining electrode length in a melting furnace | |
| CN103792251B (en) | Method for measuring melting rate of covering slag | |
| KR102131005B1 (en) | Solidification simulator | |
| Courtney et al. | Crystallisation of slag films formed in continuous casting | |
| CN214585389U (en) | Device for rapidly measuring carbon content of liquid metal | |
| Shiau et al. | Effect of magnesium oxide content on final slag fluidity of blast furnace | |
| CN102735591A (en) | Method for testing viscosity of continuous casting mold powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200616 Effective date of abandoning: 20220728 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200616 Effective date of abandoning: 20220728 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |