CN111382393B - Molten iron pretreatment desulfurization powder computing method - Google Patents
Molten iron pretreatment desulfurization powder computing method Download PDFInfo
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- CN111382393B CN111382393B CN202010354586.7A CN202010354586A CN111382393B CN 111382393 B CN111382393 B CN 111382393B CN 202010354586 A CN202010354586 A CN 202010354586A CN 111382393 B CN111382393 B CN 111382393B
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- powder
- desulfurization
- molten iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 39
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 37
- 230000023556 desulfurization Effects 0.000 title claims abstract description 37
- 239000000843 powder Substances 0.000 title claims abstract description 33
- 238000004364 calculation method Methods 0.000 title claims abstract description 16
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 24
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011593 sulfur Substances 0.000 claims abstract description 18
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 18
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 239000011777 magnesium Substances 0.000 claims abstract description 9
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 102000005298 Iron-Sulfur Proteins Human genes 0.000 claims abstract description 7
- 108010081409 Iron-Sulfur Proteins Proteins 0.000 claims abstract description 7
- 238000000611 regression analysis Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
-
- 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
- C21C2300/00—Process aspects
- C21C2300/06—Modeling of the process, e.g. for control purposes; CII
-
- 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
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Algebra (AREA)
- Bioinformatics & Computational Biology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Operations Research (AREA)
- Probability & Statistics with Applications (AREA)
- Organic Chemistry (AREA)
- Evolutionary Biology (AREA)
- Metallurgy (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a calculation method of desulfurization powder for molten iron pretreatment, 1) deducing calculation models of different molten iron sulfur contents, molten iron weights at target sulfur content of 0.001%, target sulfur content of 0.003% and target sulfur content of 0.005% in ton iron and magnesium consumption through big data regression analysis; 2) Calculating the blowing quantity of the tank desulfurization powder according to the iron and magnesium consumption per ton; 3) The powder injection quantity is self-learned, and when the desulfurization hit rate is continuously higher than 95% or lower than 85% in the range of continuous 5-tank injection period, the powder injection quantity is corrected. The calculation method is suitable for field production, and the average magnesium consumption is reduced by 0.05kg/t iron.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to powder calculation in a molten iron pretreatment desulfurization process of a steel mill.
Background
The molten iron pre-desulfurization is desulfurization treatment carried out before molten iron is added into a converter, is the most important ring in the molten iron pretreatment, plays a remarkable role in stably controlling the sulfur content of molten iron fed into the converter, optimizing a smelting process and reducing production cost, and becomes an indispensable process in ferrous metallurgy production. The prior mature desulfurization treatment method comprises a KR method and a composite blowing method.
The composite blowing relates to desulfurization powder calculation as a key research direction of domestic iron and steel enterprises.
Disclosure of Invention
The invention aims to solve the technical problem of providing a calculation method of molten iron pretreatment desulfurization powder, which is suitable for on-site production, reduces magnesium consumption and improves benefit.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method for calculating desulfurization powder for molten iron pretreatment comprises the following steps:
1) Deducing calculation models of iron and magnesium consumption per ton with different molten iron sulfur contents and molten iron weights at target sulfur contents of 0.001%, 0.003% and 0.005% by big data regression analysis;
ton iron magnesium consumption a=a+b, incoming molten iron temperature+c, incoming molten iron sulfur content
Target sulfur content 0.001%, a=0.0187 (kg/t); b= 0.000215 (kg/t ℃); c=11.3 (kg/t%);
target sulfur content 0.003%, a= -0.0634 (kg/t); b= 0.000176 (kg/t ℃); c=11.5 (kg/t%);
target sulfur content 0.005%, a= -0.231 (kg/t); b=0.000152 (kg/t); c=11.5 (kg/t%);
2) Calculating the blowing quantity of the tank desulfurization powder according to the iron and magnesium consumption per ton
Magnesium powder injection quantity X=iron magnesium consumption A per ton molten iron weight
Lime powder blowing quantity z=magnesium powder blowing quantity X3
3) Self-learning of quantity of powder injection
The desulfurization hit rate Y is the ratio of (the sulfur content after removal-the target sulfur content) is less than or equal to 0.002 percent, when the desulfurization hit rate is continuously higher than 95 percent or lower than 85 percent in the range of a continuous 5-tank blowing period, the powder blowing quantity is corrected, and the calculation formula of the desulfurization powder is corrected as follows:
(1) when the desulfurization hit rate Y is between 95% and 97.5%, the amount of injected magnesium powder a1=x (y+2 (97.5% -Y));
(2) when the desulfurization hit rate Y is more than or equal to 97.5%, the quantity A2=X (Y-2 (Y-97.5%);
(3) when the desulfurization hit rate Y is less than 85%, the quantity A3=X/(Y+13%)
(4) The quantity of sprayed calcium powder z=the quantity of sprayed magnesium powder x×3.
Compared with the prior art, the invention has the beneficial effects that:
the calculation method is suitable for field production, and the average magnesium consumption is reduced by 0.05kg/t iron.
Detailed Description
The invention is further illustrated by the following examples:
the following examples illustrate the invention in detail. These examples are merely illustrative of the best embodiments of the invention and do not limit the scope of the invention.
A calculation method of desulfurization powder for molten iron pretreatment comprises the following steps:
1) Establishing a desulfurization powder calculation model according to a regression formula
Ton iron magnesium consumption a (kg/t) =a+b-incoming molten iron temperature+c-incoming molten iron sulfur content
Target sulfur content 0.001%, a=0.0187 (kg/t); b= 0.000215 (kg/t ℃); c=11.3 (kg/t%);
target sulfur content 0.003%, a= -0.0634 (kg/t); b= 0.000176 (kg/t ℃); c=11.5 (kg/t%);
target sulfur content 0.005%, a= -0.231 (kg/t); b=0.000152 (kg/t); c=11.5 (kg/t%);
magnesium powder injection quantity X=iron magnesium consumption A per ton molten iron weight
Lime powder blowing quantity z=magnesium powder blowing quantity X3
2) Measuring the temperature of molten iron after iron folding in the pouring process, and taking a molten iron sample and sending the molten iron sample to a laboratory;
3) The molten iron temperature, the molten iron weight and the molten iron components are sent to a desulfurization process through an MES system;
4) The desulfurization operator inputs the molten iron temperature, the molten iron weight, the molten iron sulfur content and the target sulfur content into a desulfurization powder model calculation tool;
5) Inputting the calculated quantity of magnesium powder and lime powder into a first-level computer to finish the desulfurization powder blowing process
6) The quantity of the powder sprayed is self-learned, when the desulfurization hit rate Y is continuously higher than 95% or lower than 85% in the range of a continuous 5-tank spraying period, the quantity of the powder sprayed is corrected, and the calculation formula of the desulfurization powder is corrected as follows:
(1) when the desulfurization hit rate Y is between 95% and 97.5%, the amount of injected magnesium powder a1=x (y+2 (97.5% -Y));
(2) when the desulfurization hit rate Y is more than or equal to 97.5%, the quantity A2=X (Y-2 (Y-97.5%);
(3) when the desulfurization hit rate Y is less than 85%, the quantity A3=X/(Y+13% of the sprayed magnesium powder);
(4) the quantity of sprayed calcium powder z=the quantity of sprayed magnesium powder x×3.
Claims (1)
1. The method for calculating the desulfurization powder for molten iron pretreatment is characterized by comprising the following steps of:
1) Deducing calculation models of iron and magnesium consumption per ton with different molten iron sulfur contents and molten iron weights at target sulfur contents of 0.001%, 0.003% and 0.005% by big data regression analysis;
ton iron magnesium consumption a=a+b, incoming molten iron temperature+c, incoming molten iron sulfur content
Target sulfur content 0.001%, a=0.0187; unit kg/t; b= 0.000215; unit kg/t DEG C; c=11.3; units kg/t;
target sulfur content 0.003%, a= -0.0634; unit kg/t; b= 0.000176; unit kg/t DEG C; c=11.5; units kg/t;
target sulfur content 0.005%, a= -0.231; unit kg/t; b=0.000152; unit kg/t DEG C; c=11.5; units kg/t;
2) Calculating the current blowing quantity of the desulfurization powder in the tank time according to the iron and magnesium consumption per ton
Magnesium powder injection quantity X=iron magnesium consumption A per ton molten iron weight
Lime powder blowing quantity z=magnesium powder blowing quantity X3
3) Self-learning of quantity of powder injection
When the desulfurization hit rate is continuously higher than 95% or lower than 85% in the range of the continuous 5-tank blowing period, the powder blowing quantity is corrected, and the calculation formula of the desulfurization powder is corrected as follows:
(1) when the desulfurization hit rate Y is between 95% and 97.5%, the amount of injected magnesium powder a1=x (y+2 (97.5% -Y));
(2) when the desulfurization hit rate Y is more than or equal to 97.5%, the quantity A2=X (Y-2 (Y-97.5%);
(3) when the desulfurization hit rate Y is less than 85%, the quantity A3=X/(Y+13% of the sprayed magnesium powder);
(4) the quantity of sprayed calcium powder z=the quantity of sprayed magnesium powder x×3.
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| CN202010354586.7A CN111382393B (en) | 2020-04-29 | 2020-04-29 | Molten iron pretreatment desulfurization powder computing method |
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| CN202010354586.7A CN111382393B (en) | 2020-04-29 | 2020-04-29 | Molten iron pretreatment desulfurization powder computing method |
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| CN111382393A CN111382393A (en) | 2020-07-07 |
| CN111382393B true CN111382393B (en) | 2024-01-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390098A (en) * | 2013-06-28 | 2013-11-13 | 武汉钢铁(集团)公司 | Desulfurization computing method and system applying same |
| CN106503413A (en) * | 2015-08-31 | 2017-03-15 | 上海梅山钢铁股份有限公司 | A kind of accurate method for calculating desulfurizing iron magnesium powder amount |
| JP2017201046A (en) * | 2016-05-02 | 2017-11-09 | 新日鐵住金株式会社 | Method for desulfurizing molten iron |
| CN109840309A (en) * | 2018-11-01 | 2019-06-04 | 河钢股份有限公司 | A kind of calculation method of iron melt desulfurizing agent dosage |
-
2020
- 2020-04-29 CN CN202010354586.7A patent/CN111382393B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390098A (en) * | 2013-06-28 | 2013-11-13 | 武汉钢铁(集团)公司 | Desulfurization computing method and system applying same |
| CN106503413A (en) * | 2015-08-31 | 2017-03-15 | 上海梅山钢铁股份有限公司 | A kind of accurate method for calculating desulfurizing iron magnesium powder amount |
| JP2017201046A (en) * | 2016-05-02 | 2017-11-09 | 新日鐵住金株式会社 | Method for desulfurizing molten iron |
| CN109840309A (en) * | 2018-11-01 | 2019-06-04 | 河钢股份有限公司 | A kind of calculation method of iron melt desulfurizing agent dosage |
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| CN111382393A (en) | 2020-07-07 |
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