CN115505673A - Method for improving alloy absorption rate - Google Patents
Method for improving alloy absorption rate Download PDFInfo
- Publication number
- CN115505673A CN115505673A CN202211300142.0A CN202211300142A CN115505673A CN 115505673 A CN115505673 A CN 115505673A CN 202211300142 A CN202211300142 A CN 202211300142A CN 115505673 A CN115505673 A CN 115505673A
- Authority
- CN
- China
- Prior art keywords
- alloy
- screening
- molten iron
- converter
- improved
- 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
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
- C21C5/30—Regulating or controlling the blowing
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method for improving the absorptivity of an alloy, which comprises the following steps: taking a molten iron sample in a mixer furnace, and detecting the components of the molten iron in an irregular sampling mode; calculating the alloy recovery rate according to the addition amount of the alloy and verifying whether the alloy grade is abnormal or not; the alloy screening component is improved, the alloy screening feasibility and benefit analysis are increased, the equipment point inspection is enhanced, and the normal operation of the alloy screening equipment is ensured; optimizing alloy screening equipment, increasing the screening aperture by 1cm, and improving the alloy screening amount; sealing the vibrating screen and the ash bin, and removing dust from the vibrating screen by using a dust removal pipeline; before the converter is started to blow, determining the components and the temperature of molten iron, and adding a flux and the quantity of cold materials according to the operation condition of a previous furnace; the height of the lance position is adjusted according to the temperature rise and the slag melting condition of a converter molten pool in the blowing process; the slag stopping effect of tapping is improved, and a double-type slag stopping plug is designed according to the size of a tapping hole in the early stage and is plugged when in use; according to the service condition of the steel tapping hole, the furnace shape of the converter is maintained, the steel tapping hole is repaired, and the slag stopping rate is improved.
Description
Technical Field
The invention belongs to the technical field of steelmaking, and particularly relates to a method for improving the absorption rate of alloy.
Background
At present, in order to save production cost and improve economic benefit, the addition of conventional steel and variety steel alloy is controlled in a narrow component mode, the internal control standard range is narrowed, the addition of the alloy is strictly calculated, the end-point carbon component standard-reaching rate is improved in operation, the iron oxide content in slag is reduced, the alloy recovery rate is improved, and the alloy consumption is reduced. The current new line plan index of the steel plant is 23.35 kg/ton steel (including 9 kg silicon manganese ball per ton steel), the target value is reduced by 0.5 kg/ton steel compared with the plan index, and the fighting value is reduced by 1 kg/ton steel compared with the plan index. The old line plan index is 21.93 kg/ton steel, the target value is reduced by 0.5 kg/ton steel compared with the plan index, and the fighting value is reduced by 1 kg compared with the plan index.
The problems existing at present are as follows:
1) The control of the Mn content in the molten iron is unstable, and the Mn content in the molten iron is generally controlled to be 0.20-0.60 percent at present.
2) The alloy grade fluctuates, the alloy consumption is influenced, and the highest value of the Mn content in the qualified silicomanganese is 67.1 percent, and the lowest value is 63.72 percent.
3) The sieving amount of the alloy powder is low, and the average sieving amount of the alloy is 40T per month.
4) The percent content and the first-turnover rate of C in the steel discharged at the blowing end point of the converter are low, the TFe content in slag is high, the oxidability is strong, and the alloy absorption rate is reduced; the first-time rate is 20.99%, the TFe content in the slag is 16%, and the slag blocking during converter tapping is poor.
Disclosure of Invention
The invention aims to provide a method for improving the absorptivity of an alloy.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method of increasing the absorptivity of an alloy, comprising the steps of:
1) Taking a molten iron sample in a mixer furnace, and detecting the components of the molten iron in an irregular sampling mode;
2) Calculating the alloy recovery rate according to the addition amount of the alloy and verifying whether the alloy grade is abnormal or not;
3) The alloy screening component is improved, the alloy screening feasibility and benefit analysis are increased, the equipment point inspection is enhanced, the equipment fault is found, the equipment is maintained in time, and the normal operation of the alloy screening equipment is ensured;
4) Optimizing alloy screening equipment, increasing the screening aperture by 1cm, and improving the alloy screening amount; sealing the vibrating screen and the ash bin, and removing dust from the vibrating screen by using a dust removal pipeline;
5) Before the converter is started to blow, determining the components and the temperature of molten iron, and adding a flux and the quantity of cold materials according to the operation condition of a previous furnace; the height of the lance position is adjusted according to the temperature rise and slagging conditions of a converter molten pool in the blowing process;
6) The slag stopping effect of tapping is improved, and a double-type slag stopping plug is designed according to the size of a tapping hole in the early stage and is plugged when in use;
7) According to the service condition of the steel tapping hole, the furnace shape of the converter is maintained, the steel tapping hole is repaired, and the slag stopping rate is improved.
The invention has the following beneficial effects:
1) Normally controlling the Mn content in the molten iron to be 0.20-0.60 percent, and reducing fluctuation;
2) The supply grade fluctuation of different batches of alloys is reduced, and the alloy consumption is reduced.
3) The content and the first-turnover rate of C in the steel discharged at the blowing end point of the converter and the content of TFe in slag are improved, the oxidizability is reduced, and the alloy absorption rate is improved.
4) The steel slag-stopping rate is improved, the oxidability of molten steel is reduced, and the alloy absorption rate is improved.
Detailed Description
The present invention will now be described in further detail.
A method for improving the absorptivity of an alloy comprises the following steps:
1. 6 molten iron samples are taken from the mixer furnace for analysis and test every shift, and the test result is reported to an operator in time. The molten iron components are matched with molten iron according to the molten iron components transmitted by the torpedo ladle, the molten iron components are timely reported to an operator, and the molten iron components are detected in an irregular sampling inspection mode.
2. And timely informing post personnel of the components of each batch of alloy entering the factory, accounting the alloy recovery rate according to the addition amount and verifying whether the alloy grade is abnormal.
3. The alloy sieve component is improved.
1) And the alloy screening feasibility and benefit analysis are increased.
2) And (4) strengthening the point inspection of equipment, finding out equipment faults and timely reporting the equipment faults to a motor department, formulating maintenance time nodes and ensuring the normal operation of alloy screening equipment.
3) The alloy screening equipment is optimized, the screening aperture is increased by 1cm, and the alloy screening amount is increased.
4) And sealing the vibrating screen and the ash bin, and removing dust from the vibrating screen by using a dust removal pipeline.
4. The converter knows the composition and temperature of molten iron in time before blowing, and adds flux and cold charge quantity according to the operation condition of the previous furnace; the height of the lance position is adjusted according to the temperature rise and slagging conditions of a converter molten pool in the blowing process, so that the phenomena of splashing and dry returning are avoided, and the phosphorus and sulfur removal efficiency is improved. Improves the smelting control level in the whole process, improves the tapping [ C ] content and the one-time hit rate, and reduces the TFe content and the terminal point oxidability in slag.
5. Improving the slag-stopping effect during tapping.
1) The slag blocking mode, the specific gravity and the size of a slag blocking ball (cone) and a slag blocking plug are optimized.
2) The early slag stopping work is well done, the double-type slag stopping plug is designed according to the size of the steel tapping hole, and the plug is ensured to be tight during use and is prevented from falling off strictly.
3) And (5) carrying out optimized test tracking conditions of the slag stopper, and carrying out batch use according to the application effect after the model is implemented.
4) According to the service condition of the steel tapping hole, the furnace shape of the converter is maintained, the steel tapping hole is repaired timely, and the slag stopping rate is improved.
Example (b):
1) And modifying the internal control molten iron component control requirement, wherein in order to stabilize the operation of the converter, the molten iron component control requirement is changed into Si:0.20% -0.30%, mn: about 0.30-0.50%, and P less than 0.120%.
2) And tracking the alloy grades of different batches, and timely notifying and recording unqualified products or concessioned and received alloys.
3) And the converter and the refining workshop carry out fine operation according to the reported alloy components, compile an alloy addition amount recommendation formula and guide the alloy addition amount of operating personnel.
4) The alloy screening equipment is optimized, the screening aperture is increased by 1cm, and the alloy screening amount is increased.
5) The one-time hit rate of the converter is improved, and the oxidability of the molten steel is reduced.
6) The detection means of sliding plate slag blocking and slag discharging are combined, so that the detection data are real and accurate, and the slag blocking effect of tapping is improved.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (1)
1. A method of increasing the absorptivity of an alloy, comprising the steps of:
1) Taking a molten iron sample in a mixer furnace, and detecting the components of the molten iron in an irregular sampling mode;
2) Calculating the alloy recovery rate according to the addition amount of the alloy and verifying whether the grade of the alloy is abnormal;
3) The alloy screening component is improved, the alloy screening feasibility and benefit analysis are increased, the equipment point inspection is enhanced, the equipment fault is found, the equipment is maintained in time, and the normal operation of the alloy screening equipment is ensured;
4) Optimizing alloy screening equipment, increasing the screening aperture by 1cm, and improving the alloy screening amount; sealing the vibrating screen and the ash bin, and removing dust from the vibrating screen by using a dust removal pipeline;
5) Before blowing, determining molten iron components and molten iron temperature of a converter, and adding flux and cold charge quantity according to the operation condition of the previous furnace; the height of the lance position is adjusted according to the temperature rise and the slag melting condition of a converter molten pool in the blowing process;
6) The slag stopping effect of tapping is improved, and a double-type slag stopping plug is designed according to the size of a tapping hole in the early stage and is plugged when in use;
7) According to the service condition of the steel tapping hole, the converter shape is maintained, the steel tapping hole is repaired, and the slag stopping rate is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211300142.0A CN115505673A (en) | 2022-10-24 | 2022-10-24 | Method for improving alloy absorption rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211300142.0A CN115505673A (en) | 2022-10-24 | 2022-10-24 | Method for improving alloy absorption rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115505673A true CN115505673A (en) | 2022-12-23 |
Family
ID=84512365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211300142.0A Pending CN115505673A (en) | 2022-10-24 | 2022-10-24 | Method for improving alloy absorption rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115505673A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667715A (en) * | 1985-12-06 | 1987-05-26 | Inland Steel Company | Method for controlling uniformity of alloy content in continuously cast steel |
| CN204134883U (en) * | 2014-09-16 | 2015-02-04 | 山东钢铁股份有限公司 | A kind of alloy screening plant |
| CN107779550A (en) * | 2017-09-30 | 2018-03-09 | 钢铁研究总院 | A kind of method that molten steel manganeisen addition is reduced in refining process |
| CN112036081A (en) * | 2020-08-26 | 2020-12-04 | 北京科技大学 | Method for determining addition amount of silicon-manganese alloy in converter tapping based on yield prediction |
| CN112281048A (en) * | 2020-09-27 | 2021-01-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving chromium yield of stainless steel AOD converter |
| CN113151631A (en) * | 2021-04-21 | 2021-07-23 | 山东鑫华特钢集团有限公司 | Accurate smelting control method for converter alloy components |
| CN114737020A (en) * | 2022-04-27 | 2022-07-12 | 马鞍山钢铁股份有限公司 | High-precision control method for effective titanium component in steelmaking process |
-
2022
- 2022-10-24 CN CN202211300142.0A patent/CN115505673A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667715A (en) * | 1985-12-06 | 1987-05-26 | Inland Steel Company | Method for controlling uniformity of alloy content in continuously cast steel |
| CN204134883U (en) * | 2014-09-16 | 2015-02-04 | 山东钢铁股份有限公司 | A kind of alloy screening plant |
| CN107779550A (en) * | 2017-09-30 | 2018-03-09 | 钢铁研究总院 | A kind of method that molten steel manganeisen addition is reduced in refining process |
| CN112036081A (en) * | 2020-08-26 | 2020-12-04 | 北京科技大学 | Method for determining addition amount of silicon-manganese alloy in converter tapping based on yield prediction |
| CN112281048A (en) * | 2020-09-27 | 2021-01-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving chromium yield of stainless steel AOD converter |
| CN113151631A (en) * | 2021-04-21 | 2021-07-23 | 山东鑫华特钢集团有限公司 | Accurate smelting control method for converter alloy components |
| CN114737020A (en) * | 2022-04-27 | 2022-07-12 | 马鞍山钢铁股份有限公司 | High-precision control method for effective titanium component in steelmaking process |
Non-Patent Citations (1)
| Title |
|---|
| 赵跃萍，张金柱，陈登杰，卞章煜: "高碳锰铁冶炼锰回收率的试验研究", 中国锰业, vol. 14, no. 04, pages 212 - 214 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103642976B (en) | A kind of smelting technology of H13 steel | |
| CN102031396B (en) | Method for extracting vanadium from molten iron | |
| CN106048129B (en) | Converter high-carbon low-phosphorus end point control metallurgy method under phosphorus high-molten iron condition | |
| CN108148941B (en) | Smelting method of ultra-low boron steel | |
| CN110766452A (en) | Method for measuring and calculating metal yield of scrap steel | |
| CN113913583B (en) | Slag modification and slag splashing furnace protection method | |
| CN101592650B (en) | Method for continuously measuring carbon content of molten steel in electric steelmaking furnace | |
| CN115505673A (en) | Method for improving alloy absorption rate | |
| CN110564916B (en) | Method for shortening refining time of SPHC steel grade | |
| CN110991772B (en) | Efficient furnace protection method for predicting final slag viscosity model of converter | |
| CN113005254A (en) | Unmanned intelligent steelmaking system and steelmaking method | |
| CN113151631A (en) | Accurate smelting control method for converter alloy components | |
| CN110218955B (en) | Preparation method for preventing generation of delta ferrite by SA182F92 | |
| CN116042949A (en) | Production method for non-refining treatment of low-carbon low-silicon steel | |
| CN113435037B (en) | Method for judging slag pouring time in early stage of cast residue smelting of 300t converter | |
| CN104894328A (en) | Method for forecasting phosphorus content of converter end point | |
| CN111411190B (en) | Production method for improving smelting efficiency of converter | |
| CN113652525B (en) | Method for accurately controlling chromium content according to AOD steel sample | |
| CN113186368B (en) | Process for efficiently smelting high-carbon steel by one-step high-carbon-drawing method of 60-ton converter | |
| CN111304521A (en) | Method for improving purity of nodular cast iron smelting molten iron | |
| CN104928432A (en) | Method for removing phosphorus in converter through blowing nitrogen | |
| CN111100964A (en) | Method for improving foaming of converter final slag | |
| CN115896397B (en) | LF refining intelligent slag system control method and system | |
| Wen et al. | Control Method of preventing splashing in the refining process of AOD furnace based on equal temperature zones | |
| CN111471834B (en) | Slab continuous casting plain carbon steel LF desulfurization method |
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 |