CN116516096A - Test method of slag-diluting agent material for converter - Google Patents
Test method of slag-diluting agent material for converter Download PDFInfo
- Publication number
- CN116516096A CN116516096A CN202310591338.8A CN202310591338A CN116516096A CN 116516096 A CN116516096 A CN 116516096A CN 202310591338 A CN202310591338 A CN 202310591338A CN 116516096 A CN116516096 A CN 116516096A
- Authority
- CN
- China
- Prior art keywords
- slag
- steel
- converter
- diluting agent
- molten
- 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
- 239000003085 diluting agent Substances 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 title claims abstract description 21
- 238000010998 test method Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000009628 steelmaking Methods 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims description 65
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 239000012749 thinning agent Substances 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 238000005275 alloying Methods 0.000 claims description 6
- 238000005261 decarburization Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 230000003749 cleanliness Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims 5
- 230000000630 rising effect Effects 0.000 claims 1
- 229910001570 bauxite Inorganic materials 0.000 description 8
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the field of steelmaking converters, and relates to a method for testing a slag-diluting agent material for a converter.
Description
Technical Field
The invention belongs to the field of steelmaking converters, and relates to a method for testing slag-diluting agent materials for a converter.
Background
Bauxite Deng Zaozha materials are often used in the existing steelmaking smelting, and have the advantages of reducing the melting point of slag, increasing the melting speed of slag, improving the slag-iron separation condition of slag, controlling the deslagging time, but the bauxite deslagging time is too high, so that a better quality slag thinning agent needs to be replaced, and a judging method does not appear for evaluating and judging whether the replaced slag thinning agent is qualified or not, so that the test is carried out.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for testing a slag diluent material for a converter, which can reduce the melting point of slag and increase the melting speed of slag, thereby improving the slag-iron separation condition of slag and controlling the slag pouring time.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for testing a slag-diluting agent material for a converter comprises the following steps:
s1, charging: adding metal materials such as scrap steel, molten iron and the like according to a filling system;
s2, burning and oxygen supply blowing by a lower gun: selecting oxygen flow, strength and gun position according to the set oxygen supply mode, and selecting a smelting mode at the same time;
s3, slagging: adding a slag-forming material and performing slag-forming operation, and simultaneously adding a slag-diluting agent in the process to remove sulfur, phosphorus and other impurities in steel, and transferring oxygen to a molten pool through oxidizing slag to reduce corrosion of slag to a furnace lining;
s31, mixing the slag diluting agent: physical and chemical contents include AL 2 O 3 ≥60％，SiO 2 ≤20％，S≤0.08％，H 2 O is less than or equal to 2 percent; particle size requirements: 5 mm-30 mm, wherein the grain fraction content of less than 5mm and more than 30mm is not more than 5%, and the maximum grain size is not more than 35mm;
s32, adding timing of slag thinning agent: after the burning torch is ignited normally, the consumption of the slag diluting agent is added along with the first batch of auxiliary materials at one time;
s33, recording the addition amount of slag diluting agent for each converter of the test heat, corresponding heat number and abnormal reaction information in the smelting process;
s4, heating: reaching the required standard tapping temperature;
s5, deoxidizing: the deoxidizer is added, and the deoxidizing process is an important ring of converter steelmaking, and has direct influence on the form, quantity, type, alloying effect and the like of inclusions in the steel;
s6, alloying: adding a specified alloy quantity, and adjusting the alloy components of the molten steel to standard values;
s7, slag blocking tapping: when the composition and the temperature of the molten steel meet the variety judgment standards, the furnace shaking tapping enters the next working procedure.
Optionally, the smelting mode comprises a decarburization mode and a dephosphorization mode, and the decarburization speed, the slag formation speed and the temperature rise speed of the molten pool are accelerated.
Optionally, effective slag blocking is carried out when the converter is tapped, so that molten steel rephosphorization can be reduced, and the alloy yield can be improved; the inclusion in steel is reduced, and the cleanliness of molten steel is improved; the slag adhesion of the steel ladle can be reduced, and the ladle age of the steel ladle can be improved; meanwhile, the consumption of refractory materials can be reduced; can also provide good conditions for refining molten steel.
Optionally, the adding amount of the slag diluting agent is required to be adjusted according to the change of the silicon content of molten iron, and the adding amount meets the requirement of a test scheme.
Optionally, the slag-thinning agent product is dried and clean, foreign impurities cannot be mixed in, and the chemical components and the water content are sampled and analyzed.
Optionally, the average deslagging time is not higher than 3.05min, and the slag diluting agent meets the field process requirement.
The invention has the beneficial effects that: according to the test method of the slag diluent material for the converter, provided by the invention, through replacing the slag diluent and recording the test result, the slag pouring time does not exceed the heat of bauxite, the melting point of slag is reduced, and the slag melting speed is increased, so that the slag-iron separation condition of slag is improved, the slag pouring time is controlled, the bauxite can be completely replaced, the safety and environmental protection effects are not increased in the use process, and the method can be incorporated into large production.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
A method for testing a slag-diluting agent material for a converter comprises the following steps:
s1, charging: adding metal materials such as scrap steel, molten iron and the like according to a filling system;
s2, burning and oxygen supply blowing by a lower gun: according to the set oxygen supply mode, selecting oxygen flow and strength and gun position, and simultaneously selecting smelting modes such as a decarburization mode, a dephosphorization mode and the like, so as to accelerate decarburization speed, slag formation speed and heating speed of a molten pool;
s3, slagging: adding a slag-forming material and performing slag-forming operation, and simultaneously adding a slag-diluting agent in the process to remove sulfur, phosphorus and other impurities in steel, and transferring oxygen to a molten pool through oxidizing slag to reduce corrosion of slag to a furnace lining;
s31, mixing the slag diluting agent: physical and chemical contents include AL 2 O 3 ≥60％，SiO 2 ≤20％，S≤0.08％，H 2 O is less than or equal to 2 percent; particle size requirements: 5 mm-30 mm, wherein the grain fraction content of less than 5mm and more than 30mm is not more than 5%, and the maximum grain size is not more than 35mm;
s32, adding timing of slag thinning agent: after the burning torch is ignited normally, the consumption of the slag diluting agent is added along with the first batch of auxiliary materials at one time;
s33, recording the addition amount of slag diluting agent for each converter of the test heat, corresponding heat number and abnormal reaction information in the smelting process;
s4, heating: reaching the required standard tapping temperature;
s5, deoxidizing: the deoxidizer is added, and the deoxidizing process is an important ring of converter steelmaking, and has direct influence on the form, quantity, type, alloying effect and the like of inclusions in the steel;
s6, alloying: adding a specified alloy quantity, and adjusting the alloy components of the molten steel to standard values;
s7, slag blocking tapping: when the composition and the temperature of the molten steel meet the variety judgment standards, the furnace shaking tapping enters the next working procedure.
In the embodiment, effective slag blocking is carried out when the converter is tapped, so that molten steel rephosphorization can be reduced, and the alloy yield is improved; the inclusion in steel is reduced, and the cleanliness of molten steel is improved; the slag adhesion of the steel ladle can be reduced, and the ladle age of the steel ladle can be improved; meanwhile, the consumption of refractory materials can be reduced; can also provide good conditions for refining molten steel.
In the embodiment, the addition amount of the slag-diluting agent is required to be adjusted according to the change of the silicon content of molten iron, the addition amount meets the requirement of a test scheme, the slag-diluting agent product is dried and clean and cannot be mixed with foreign impurities, and chemical components and water content are sampled and analyzed.
In the embodiment, the average deslagging time is not higher than 3.05min, so that the slag diluting agent meets the field process requirement.
In the case of the embodiment 1,
1. adopts a slag-diluting agent batching table:
| composition of the components | Al 2 O 3 | SiO 2 | S | H 2 O |
| Content of% | 73.46 | 14.28 | 0.038 | 0.22 |
Physicochemical indexes of the slag diluting agent meet protocol requirements;
2. after adding the slag diluting agent, the field test condition is as follows:
the products were all tested in a 3# converter and the test data are shown in the following table:
from the table, the furnace number using the slag thinning agent eliminates abnormal influence, the average slag pouring time is 2.67min, the slag pouring time is slightly better than that of the furnace number using bauxite, and the slag and iron separation is better from the slag pouring process.
The addition amount of the slag thinning agent is required to be adjusted according to the change of the silicon content of molten iron, and meets the requirement of a test scheme. 538kg of bauxite is added for conversion.
Meanwhile, in the test, the feeding and adding of the slag diluting agent meet the current standards, and no accidents affecting safety and environmental protection occur.
3. Conclusion of the test:
the slag diluting agent can effectively promote slag-iron separation, the slag pouring time does not exceed the heat of bauxite, the bauxite can be completely replaced, and the safety and environmental protection effect is not increased in the use process, so that the slag pouring agent is recommended to be incorporated into mass production.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (6)
1. The test method of the slag-diluting agent material for the converter is characterized by comprising the following steps of:
s1, charging: adding metal materials such as scrap steel, molten iron and the like according to a filling system;
s2, burning and oxygen supply blowing by a lower gun: selecting oxygen flow, strength and gun position according to the set oxygen supply mode, and selecting a smelting mode at the same time;
s3, slagging: adding a slag-forming material and performing slag-forming operation, and simultaneously adding a slag-diluting agent in the process to remove sulfur, phosphorus and other impurities in steel, and transferring oxygen to a molten pool through oxidizing slag to reduce corrosion of slag to a furnace lining;
s31, mixing the slag diluting agent: physical and chemical contents include AL 2 O 3 ≥60％，SiO 2 ≤20％，S≤0.08％，H 2 O is less than or equal to 2 percent; particle size requirements: 5 mm-30 mm, wherein the grain fraction content of less than 5mm and more than 30mm is not more than 5%, and the maximum grain size is not more than 35mm;
s32, adding timing of slag thinning agent: after the burning torch is ignited normally, the consumption of the slag diluting agent is added along with the first batch of auxiliary materials at one time;
s33, recording the addition amount of slag diluting agent for each converter of the test heat, corresponding heat number and abnormal reaction information in the smelting process;
s4, heating: reaching the required standard tapping temperature;
s5, deoxidizing: the deoxidizer is added, and the deoxidizing process is an important ring of converter steelmaking, and has direct influence on the form, quantity, type, alloying effect and the like of inclusions in the steel;
s6, alloying: adding a specified alloy quantity, and adjusting the alloy components of the molten steel to standard values;
s7, slag blocking tapping: when the composition and the temperature of the molten steel meet the variety judgment standards, the furnace shaking tapping enters the next working procedure.
2. The method for testing a slag-reducing agent material for a converter according to claim 1, wherein: the smelting mode comprises a decarburization mode and a dephosphorization mode, and the decarburization speed, the slag forming speed and the temperature rising speed of a molten pool are accelerated.
3. The method for testing a slag-reducing agent material for a converter according to claim 1, wherein: the slag is effectively blocked when the converter is tapped, so that molten steel rephosphorization can be reduced, and the alloy yield is improved; the inclusion in steel is reduced, and the cleanliness of molten steel is improved; the slag adhesion of the steel ladle can be reduced, and the ladle age of the steel ladle can be improved; meanwhile, the consumption of refractory materials can be reduced; can also provide good conditions for refining molten steel.
4. The method for testing a slag-reducing agent material for a converter according to claim 1, wherein: the addition amount of the slag thinning agent is required to be adjusted according to the change of the silicon content of molten iron, and meets the requirement of a test scheme.
5. The method for testing a slag-reducing agent material for a converter according to claim 1, wherein: the slag thinner product is dried and clean, foreign impurities are not mixed, and the chemical components and the water content are sampled and analyzed.
6. The method for testing a slag-reducing agent material for a converter according to claim 1, wherein: the average deslagging time is not higher than 3.05min, so that the slag thinning agent meets the field process requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310591338.8A CN116516096A (en) | 2023-05-24 | 2023-05-24 | Test method of slag-diluting agent material for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310591338.8A CN116516096A (en) | 2023-05-24 | 2023-05-24 | Test method of slag-diluting agent material for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116516096A true CN116516096A (en) | 2023-08-01 |
Family
ID=87404749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310591338.8A Pending CN116516096A (en) | 2023-05-24 | 2023-05-24 | Test method of slag-diluting agent material for converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116516096A (en) |
-
2023
- 2023-05-24 CN CN202310591338.8A patent/CN116516096A/en active Pending
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