CN105987827A - Method for improving sampling success rate in refining process - Google Patents
Method for improving sampling success rate in refining process Download PDFInfo
- Publication number
- CN105987827A CN105987827A CN201510086894.5A CN201510086894A CN105987827A CN 105987827 A CN105987827 A CN 105987827A CN 201510086894 A CN201510086894 A CN 201510086894A CN 105987827 A CN105987827 A CN 105987827A
- Authority
- CN
- China
- Prior art keywords
- molten steel
- sampler
- slag
- equal
- steel
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 title claims abstract description 11
- 238000007670 refining Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 239000002893 slag Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 claims abstract description 7
- 229910052786 argon Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 13
- 230000001737 promoting effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract description 2
- 230000036571 hydration Effects 0.000 abstract 1
- 238000006703 hydration reaction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a method for improving the sampling success rate in the refining process, which is characterized in that after an RH molten steel tank enters a station, molten steel is pre-circulated after the molten steel tank is lifted, the flow of the lifted argon is controlled to be 80-120 Nm3The influence of the components in the slag on the molten steel components on the surface layer is relieved; the thickness of the metal cap of the sampler is more than or equal to 0.7 mm; during sampling, the depth of the sampler inserted into the molten steel is more than or equal to 300mm, and the time from the contact of the sampler with the slag surface to the insertion of the sampler into the molten steel is more than or equal to 300mm is less than or equal to 0.6 s. The method can improve the representativeness of the steel water sample, reduce the deviation between the RH refined steel hydration test component value and the actual component value of the molten steel, improve the detection precision of the steel water sample, and effectively avoid the accident that the molten steel components are not suitable after pouring caused by the component deviation.
Description
Technical field
The invention belongs to steel-making refinery practice field, RH refining process can be improved particularly to one and sample successfully
The method of rate.
Background technology
RH refine is due to technological reason, and two insertion pipes insertion molten steel at least 400mm depth below carry out molten steel and follow
Ring, the molten steel composition regulation within big tank top layer 300mm relies primarily on diffusion and completes, therefore the closer to steel
Surface layer of water, the probability of composition tolerances is the highest.
The thickness of the sampler metal cap that different manufacturers produce is not quite similar, general sampler metal cap
Thickness is many between 0.50～0.70mm, and metal cap fusing time during sampler inserts molten steel is the most not
With.At the unfused front sampler of metal cap by slag blanket and molten steel top layer, representative steel could be obtained
Water sample.So, control the insertion depth of sampler well and insertion speed is that to reduce RH refined molten steel sample ingredient inclined
The key of difference.
Summary of the invention
It is desirable to provide a kind of representativeness improving molten steel sample, reduce RH refined molten steel sample ingredient deviation,
After avoiding cast, molten steel composition does not conforms to the method improving refining process sampling success rate of accident.
For reaching this purpose, this invention takes following technical solution:
A kind of method improving refining process sampling success rate, it is characterised in that:
(1), after RH ladle enters the station, after promoting ladle, molten steel is carried out pre-circulation, promotes argon flow amount
Control 80～120Nm3/ h, to alleviate the composition impact on top layer molten steel composition in slag；
(2) sampler metal cap thickness >=0.7mm；
(3), during sampling, sampler inserts the molten steel degree of depth >=300mm, and from the sampler contact top of the slag to insertion
Time≤0.6s used by the molten steel degree of depth >=300mm.
The invention have the benefit that
The present invention can improve the representativeness of molten steel sample, reduce RH refined molten steel chemical examination signal component value actual with molten steel become
Deviation between score value, improves the accuracy of detection of molten steel sample, is prevented effectively from the cast caused due to composition tolerances
Rear molten steel composition does not conforms to accident.
Detailed description of the invention
Embodiment 1:
1, after RH ladle enters the station, before promoting ladle, molten steel is carried out pre-circulation, promotes argon flow amount control
System is at 80Nm3/ h, to alleviate the composition impact on top layer molten steel composition in slag.
2, using aluminum-free sampler, sampler metal cap thickness is 0.7mm.
3, during sampling, sampler inserts molten steel degree of depth 300mm, and from the sampler contact top of the slag to inserting molten steel
Time used by degree of depth 300mm is 0.5s.
Embodiment 2:
1, after RH ladle enters the station, molten steel is carried out pre-circulation before promoting ladle, promote flow-control and exist
100Nm3/ h, to alleviate the composition impact on top layer molten steel composition in slag.
2, using the sampler in aluminum, sampler metal cap thickness is 0.8mm.
(3) during sampling, sampler inserts molten steel degree of depth 330mm, from the sampler contact top of the slag to inserting molten steel
Time used by degree of depth 330mm is 0.6s.
Claims (1)
1. the method improving refining process sampling success rate, it is characterised in that:
(1), after RH ladle enters the station, after promoting ladle, molten steel is carried out pre-circulation, promotes argon flow amount
Control 80～120Nm3/ h, to alleviate the composition impact on top layer molten steel composition in slag；
(2) sampler metal cap thickness >=0.7mm；
(3), during sampling, sampler inserts the molten steel degree of depth >=300mm, and from the sampler contact top of the slag to insertion
Time≤0.6s used by the molten steel degree of depth >=300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510086894.5A CN105987827A (en) | 2015-02-25 | 2015-02-25 | Method for improving sampling success rate in refining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510086894.5A CN105987827A (en) | 2015-02-25 | 2015-02-25 | Method for improving sampling success rate in refining process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105987827A true CN105987827A (en) | 2016-10-05 |
Family
ID=57038595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510086894.5A Pending CN105987827A (en) | 2015-02-25 | 2015-02-25 | Method for improving sampling success rate in refining process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105987827A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE718929A (en) * | 1967-10-16 | 1969-01-16 | ||
| GB2002664A (en) * | 1977-06-01 | 1979-02-28 | British Steel Corp | Sampling device and method |
| CN2168246Y (en) * | 1992-09-25 | 1994-06-08 | 石玉泽 | Static-pressure cylinderlike device for withdraw steel liquid |
| CN1130762A (en) * | 1994-11-14 | 1996-09-11 | 赫罗伊斯电气夜间有限公司 | Sampling device for molten metals |
| CN2432573Y (en) * | 2000-07-25 | 2001-05-30 | 宝山钢铁股份有限公司 | Molten steel sampling cup |
| CN2607567Y (en) * | 2003-04-04 | 2004-03-24 | 王兴华 | Single, double chamber flowing backward type molten steel and iron sampler |
| CN2854554Y (en) * | 2005-07-29 | 2007-01-03 | 宝山钢铁股份有限公司 | Molten steel samping device for continuous casting tundish |
| CN202793841U (en) * | 2012-07-15 | 2013-03-13 | 鞍钢股份有限公司 | Converter sampler |
-
2015
- 2015-02-25 CN CN201510086894.5A patent/CN105987827A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE718929A (en) * | 1967-10-16 | 1969-01-16 | ||
| GB2002664A (en) * | 1977-06-01 | 1979-02-28 | British Steel Corp | Sampling device and method |
| CN2168246Y (en) * | 1992-09-25 | 1994-06-08 | 石玉泽 | Static-pressure cylinderlike device for withdraw steel liquid |
| CN1130762A (en) * | 1994-11-14 | 1996-09-11 | 赫罗伊斯电气夜间有限公司 | Sampling device for molten metals |
| CN2432573Y (en) * | 2000-07-25 | 2001-05-30 | 宝山钢铁股份有限公司 | Molten steel sampling cup |
| CN2607567Y (en) * | 2003-04-04 | 2004-03-24 | 王兴华 | Single, double chamber flowing backward type molten steel and iron sampler |
| CN2854554Y (en) * | 2005-07-29 | 2007-01-03 | 宝山钢铁股份有限公司 | Molten steel samping device for continuous casting tundish |
| CN202793841U (en) * | 2012-07-15 | 2013-03-13 | 鞍钢股份有限公司 | Converter sampler |
Non-Patent Citations (3)
| Title |
|---|
| 王德永 等: "RH精炼过程钢中非金属夹杂物行为及演变规律", 《东北大学学报（自然科学版）》 * |
| 耿佃桥 等: "RH精炼装置流场对混合、脱碳、夹杂物行为的影响", 《过程工程学报》 * |
| 艾新港 等: "RH工艺生产轴承钢脱氧和去除夹杂物研究", 《钢铁》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |