CN101525678A - Method of replacing lime with limestone for slagging and producing steel in oxygen top blown converter - Google Patents
Method of replacing lime with limestone for slagging and producing steel in oxygen top blown converter Download PDFInfo
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- CN101525678A CN101525678A CN200910082071A CN200910082071A CN101525678A CN 101525678 A CN101525678 A CN 101525678A CN 200910082071 A CN200910082071 A CN 200910082071A CN 200910082071 A CN200910082071 A CN 200910082071A CN 101525678 A CN101525678 A CN 101525678A
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- Prior art keywords
- lime
- limestone
- slagging
- added
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- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 53
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 53
- 239000004571 lime Substances 0.000 title claims abstract description 53
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 40
- 239000001301 oxygen Substances 0.000 title claims abstract description 40
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 32
- 239000006028 limestone Substances 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009628 steelmaking Methods 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 16
- 238000007664 blowing Methods 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 238000009833 condensation Methods 0.000 claims abstract description 3
- 230000005494 condensation Effects 0.000 claims abstract description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 26
- 238000001354 calcination Methods 0.000 abstract description 21
- 229910052742 iron Inorganic materials 0.000 abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 238000007792 addition Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 208000019901 Anxiety disease Diseases 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000036506 anxiety Effects 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
本发明属于炼钢领域，涉及一种在氧气顶吹转炉中用石灰石代替石灰造渣炼钢的方法。其特征是在炼钢过程中造渣时直接加入石灰石，增加加入批数，减少每批料的数量；即原来加入石灰造渣一般分为1－3次，当加入石灰石造渣时，要分为4－8次加入，每次的加入量按照其中的CaO计算，为加入石灰时的1/2－1/3，以避免吹炼初期炉内金属表面冷凝结壳。石灰石的加入总量按其中的CaO计算，占该炉次石灰加入总量的30％至100％之间。本发明的主要优点是取消了石灰煅烧工序或减小其生产规模，减少了煅烧设备运行和减排污染所需的费用，避免了煅烧后石灰冷却造成的热量浪费，氧气顶吹转炉内生成的石灰含硫量低，对炼钢过程抑制铁水回硫有利。The invention belongs to the field of steelmaking, and relates to a method for making slagging steel by using limestone instead of lime in an oxygen top-blown converter. It is characterized in that limestone is directly added during slagging in the steelmaking process, the number of batches added is increased, and the quantity of each batch is reduced; that is, the original slagging by adding lime is generally divided into 1-3 times, when limestone is added to slag, it must be divided It is 4-8 additions, and the amount of each addition is calculated according to the CaO in it, which is 1/2-1/3 of that when lime is added, so as to avoid condensation and crusting on the metal surface in the furnace at the initial stage of blowing. The total amount of limestone added is calculated according to the CaO therein, accounting for between 30% and 100% of the total amount of lime added to the furnace. The main advantages of the present invention are that the lime calcination process is canceled or its production scale is reduced, the cost required for the operation of calcination equipment and pollution reduction is reduced, the heat waste caused by lime cooling after calcination is avoided, and the waste generated in the oxygen top-blown converter is avoided. Lime has low sulfur content, which is good for suppressing sulfur return of molten iron in the steelmaking process.
Description
Technical field
The invention belongs to the converter steelmaking field, relate to a kind of method of in top-blown oxygen converter, using replacing lime with limestone for slagging and producing steel.
Background technology
Oxygen top blown converter steel making is a process of forcing impurity element in oxygen supply, the rapid oxidation removal molten iron, leaning on elemental oxygen heat-transmission heating molten steel raising temperature, needs to add the lime slag making in stove, to remove the impurity element phosphorus in the molten iron.
Lime is the product that is formed through calcining by Wingdale, generally will be heated to Wingdale more than 1200 ℃ in the production, and calcination process carries out a few hours, and Wingdale (lime carbonate) decomposes therebetween, effusion CO
2And become lime (calcium oxide).After burning till and come out of the stove, carrying by lime a large amount of physics heat, cool to the temperature that is suitable for transporting and just can transport steelworks to, it absorbs a large amount of heat again and is elevated to temperature of reaction again and lime is joined in the top-blown oxygen converter back, the final bits that generate are consistent with liquid steel temperature, about about 1600 ℃.This shows that with respect to also will reheat intensification in oxygen top-blown converter, a large amount of physical thermal that the lime that calcining generates has has wasted.
Why in oxygen top blown converter steel making, only add lime and do not add lime stone, not record in the steel-making document in past, logical supposition is, at the beginning of the invention of basic bessemer converter method for making steel and between last 100 years afterwards, fed oxygen from air is adopted in pneumatic steelmaking, heat is not rich in the converter, directly add lime stone decomposition in stove and can absorb a lot of heat and the furnace temperature that is difficult to raise, impact is normal smelts and cast, so all be in advance limestone calcination to be become lime, and then join in the converter.But pneumatic steelmaking is adopted after the pure oxygen blowing, the heat that reaction in furnace produces is more than needed for furnace temperature being elevated to tapping temperature, to add steel scrap and pig iron fusing heat absorption toward contact in the converter for this reason, to consume this part heat, its addition can reach 30% of whole amounts of metal at most, and when blowing when the later stage, furnace temperature was too high, also in stove, add lime stone or dolomite absorbing and cooling temperature.Therefore can think that the problem that originally restriction directly adds the furnace heat deficiency of lime stone has not existed, and considers from the angle of energy-saving and emission-reduction, can directly add slagging with Lime stone when oxygen top blown converter steel making.
Summary of the invention
Main purpose of the present invention is directly to add lime stone in the oxygen top blown converter steel making process, cancel the lime calcining operation or reduce the lime production scale, reduce the operation of lime calcining equipment and administer the required expense of pollution, avoid calcining the heat waste that rear lime cooling causes.
A kind of method that in top-blown oxygen converter, adds replacing lime with limestone for slagging and producing steel, directly add Wingdale when it is characterized in that in steelmaking process slag making desiliconization, dephosphorization, and do not add or add less lime, the adding lot number of original oxygen top blown converter steel making process neutral and alkali slag former is increased, reduce the adding quantity of every batch of material; The slag making of promptly original adding lime, generally lime is divided into 1-3 adding, when adding the Wingdale slag making, to be divided into 4-8 adding to Wingdale, each add-on is calculated according to CaO wherein, 1/2-1/3 during for adding lime is to avoid at top-blown oxygen converter blowing initial stage stove inner metal surface condensation crust; The adding total amount of Wingdale is calculated according to wherein CaO, account for this heat lime add total amount 30% to 100% between; In fusion process, should reduce the adding of other cold iron source raw materials in addition.This is the maximum difference that the present invention and original oxygen top-blown converter add lime slagging and producing steel method.
Top-blown oxygen converter adds the replacing lime with limestone for slagging and producing steel method following many advantages:
(1) heats up from joining in the oxygen top-blown converter again after limestone calcination becomes lime, experienced the process of high-temperature heating of high-temperature heating-cooling-again, if lime stone is directly dropped into oxygen top-blown converter, participate in the slagging reaction while calcining, can avoid calcining the heat waste that rear lime cooling causes, only be equivalent to experience first high-temperature heating process, save the energy and reduce discharging CO
2
(2) therefore can cancel the lime calcining operation or reduce the lime production scale in the iron and steel enterprise, reduce the operation of lime calcining equipment and reduce discharging and pollute required expense;
(3) limestone calcination becomes lime to need a few hours, and can finish in a few minutes in oxygen top-blown converter, and heat utilization efficiency and production efficiency improve, energy savings and cost;
(4) the lime production process has the dust generation to pollute, if in top-blown oxygen converter, calcine under the intensively stirred atmosphere of slag-steel, the lime dust that produces can and participate in reaction in furnace by bits and a molten steel absorption part, and do not have the limestone calcination stove to use the dust that fuel combustion produced, reduce and pollute;
(5) lime stone dinectly bruning in oxygen top-blown converter uses, and the anxiety of the lime moisture absorption in nothing transportation, the process of banking up, carbonating, quality deterioration has reduced the lime inventory carrying cost.
(6) lime stone when calcining because of the inhomogeneous lime product burning that causes easily of being heated, the activity decreased that causes itself and slag to react, and in oxygen top-blown converter, calcining, participating in immediately slagging after the decomposition of limestone reacts, the anxiety of no burning;
(7) lime stone is calcined the byproduct CO that produces in oxygen top-blown converter
2Can be used as a part of oxygen source of steel-making, reduce the use amount of pure oxygen in the steelmaking process;
(8) fuel of limestone calcination stove use more or less all contains sulphur, lime absorbs sulphur easily and becomes sulfur-bearing lime, in contrast to this, Wingdale is calcined the lime that generates in top-blown oxygen converter can not be infected with these sulphur, therefore the sulphur content in the slag is low after the slagging, and to return sulphur favourable to suppressing the steelmaking process molten iron;
(9) anxiety, sulfur content that the lime that calcining generates in oxygen top-blown converter does not have burning are low, meet the fine fodder principle that present steel industry large-scale production is advocated.
In sum, top-blown oxygen converter adding replacing lime with limestone for slagging and producing steel method will be brought huge environment, economic and social benefit.
Yet, add replacing lime with limestone for slagging and producing steel, will inevitably reduce the steel scrap amount that can melt in the oxygen top-blown converter, and as if melting waste steel can improve output easily, can boost productivity.But from the viewpoint of making the best use of everything, steel scrap is an employed highest source of iron in the STEELMAKING PRODUCTION, with respect to the pig iron and molten iron, pure and contain alloying element, thereby in market in the error-free running period, steel scrap should be high more a lot of than the price of the molten iron and the pig iron, thus in the production process that with the molten iron is raw material, use steel scrap and uneconomical, and preferably adopt non-oxide method melting steel scrap in electric arc furnace to obtain maximum value.In addition, do not add steel scrap and change the adding molten iron into, can produce more heat in the stove, and can not reduce productivity ratio.
Embodiment
Embodiment 1, test are carried out in 25 tons of oxygen top-blown converters.Beginning adds lime stone and fluorite in batches after being blended into 25 tons of rear lower rifle oxygen blast of molten iron temperature raising in 0.5 minute, and lime stone added a collection of 1.2 tons every 1 minute, adds altogether 6 times, and fluorite added once every 2 minutes, was divided into 3 addings.All slag former added about 3 minutes later on, and carbon flame gets up, and enters carbon period.The 12 minutes sampling of falling stove thermometrics of oxygen blast, composition is qualified, and temperature is 1670 ℃, then tapping.
Embodiment 2, test are carried out in 25 tons of oxygen top-blown converters.Add earlier 600 kilograms in lime, add then 2 tons of steel scraps.Be blended into 23 tons of rear lower rifle oxygen blast of molten iron temperature raising in 2 minutes again, begin then to add lime stone and fluorite in batches, lime stone is 1.45 tons in every batch of slag former, adds once every 1.5 minutes, adds altogether 4 times.All slag former added about 2 minutes later on, and carbon flame gets up, and enters carbon period.The 11 minutes sampling of falling stove thermometrics of oxygen blast, composition is qualified, and temperature is 1660 ℃, and tapping then shows that the slag making of adding Wingdale does not influence smelting and normally carries out.
Claims (1)
1, a kind of method of in top-blown oxygen converter, using replacing lime with limestone for slagging and producing steel, directly add Wingdale when it is characterized in that in the oxygen top blown converter steel making process slag making desiliconization, dephosphorization, and do not add or add less lime, the adding lot number of original steelmaking process neutral and alkali slag former is increased, reduce the adding quantity of every batch of material; The slag making of promptly original adding lime, generally lime is divided into 1-3 adding, when adding the Wingdale slag making, to be divided into 4-8 adding to Wingdale, each add-on is calculated according to CaO wherein, 1/2-1/3 during for adding lime is to avoid at top-blown oxygen converter blowing initial stage stove inner metal surface condensation crust; The adding total amount of Wingdale is calculated according to wherein CaO, account for this heat lime add total amount 30% to 100% between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910082071XA CN101525678B (en) | 2009-04-21 | 2009-04-21 | A method of using limestone instead of lime to make slag and make steel in an oxygen top-blown converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910082071XA CN101525678B (en) | 2009-04-21 | 2009-04-21 | A method of using limestone instead of lime to make slag and make steel in an oxygen top-blown converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101525678A true CN101525678A (en) | 2009-09-09 |
| CN101525678B CN101525678B (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910082071XA Expired - Fee Related CN101525678B (en) | 2009-04-21 | 2009-04-21 | A method of using limestone instead of lime to make slag and make steel in an oxygen top-blown converter |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181596A (en) * | 2011-03-31 | 2011-09-14 | 武汉钢铁(集团)公司 | Converter blowing dephosphorization process for cooling converter slag by using limestone |
| CN102719601A (en) * | 2012-05-08 | 2012-10-10 | 莱芜钢铁集团有限公司 | Method for making slag by replacing partial limestone with lime used for top and bottom combined blown converter |
| CN102766723A (en) * | 2012-06-29 | 2012-11-07 | 石家庄钢铁有限责任公司 | Limestone slagging steelmaking lance position control method for basic oxygen furnaces |
| CN102796841A (en) * | 2012-08-21 | 2012-11-28 | 东北大学 | Method for slagging steelmaking by side blowing of powder particle limestone in top-bottom combined blown converter |
| CN102864272A (en) * | 2012-10-18 | 2013-01-09 | 吉林建龙钢铁有限责任公司 | Calcite converter steelmaking method |
| CN102864273A (en) * | 2012-10-18 | 2013-01-09 | 吉林建龙钢铁有限责任公司 | Method for increasing converter gas CO recycling amount |
| CN102864276A (en) * | 2012-10-18 | 2013-01-09 | 吉林建龙钢铁有限责任公司 | Converter inactive lime steelmaking method |
| CN103205523A (en) * | 2013-03-29 | 2013-07-17 | 江苏省沙钢钢铁研究院有限公司 | Novel process for cooling by adopting stones in converter smelting |
| CN103333981A (en) * | 2013-06-09 | 2013-10-02 | 武汉钢铁(集团)公司 | Method for smelting high-silicon molten iron by using limestone as slagging material |
| CN103866079A (en) * | 2014-03-03 | 2014-06-18 | 高志勇 | Zero-lime smelting method for converter steelmaking |
| CN103898272A (en) * | 2014-03-20 | 2014-07-02 | 济钢集团有限公司 | Novel steel-making method by means of small-grain-size limestone |
| CN104073586A (en) * | 2014-07-04 | 2014-10-01 | 秦皇岛首秦金属材料有限公司 | Operating method of converter for smelting low-phosphorus steel by utilizing limestone |
| CN105779682A (en) * | 2016-03-16 | 2016-07-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Process for smelting stainless steel in dephosphorization converter by using limestone |
| CN106636533A (en) * | 2016-10-17 | 2017-05-10 | 四川省达州钢铁集团有限责任公司 | Slagging method with lime replaced with calcite in converter |
| CN106636532A (en) * | 2016-09-19 | 2017-05-10 | 中冶宝钢技术服务有限公司 | Limestone mud cake re-production auxiliary material and preparation technique thereof |
| CN107574281A (en) * | 2017-09-18 | 2018-01-12 | 北京科技大学 | The method that Low-phosphorus Steel or extremely low phosphoretic steel are produced with slagging with Lime stone single slag process |
| CN109423533A (en) * | 2017-08-25 | 2019-03-05 | 鞍钢股份有限公司 | Full molten iron converter smelting control method |
| CN114737011A (en) * | 2022-04-14 | 2022-07-12 | 首钢集团有限公司 | A kind of slagging agent for converter and method for reducing the consumption of converter lime |
| CN116200569A (en) * | 2023-03-02 | 2023-06-02 | 北京首钢股份有限公司 | Method for smelting steel from limestone |
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2009
- 2009-04-21 CN CN200910082071XA patent/CN101525678B/en not_active Expired - Fee Related
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181596A (en) * | 2011-03-31 | 2011-09-14 | 武汉钢铁(集团)公司 | Converter blowing dephosphorization process for cooling converter slag by using limestone |
| CN102719601A (en) * | 2012-05-08 | 2012-10-10 | 莱芜钢铁集团有限公司 | Method for making slag by replacing partial limestone with lime used for top and bottom combined blown converter |
| CN102766723B (en) * | 2012-06-29 | 2014-07-16 | 石家庄钢铁有限责任公司 | Limestone slagging steelmaking lance position control method for basic oxygen furnaces |
| CN102766723A (en) * | 2012-06-29 | 2012-11-07 | 石家庄钢铁有限责任公司 | Limestone slagging steelmaking lance position control method for basic oxygen furnaces |
| CN102796841A (en) * | 2012-08-21 | 2012-11-28 | 东北大学 | Method for slagging steelmaking by side blowing of powder particle limestone in top-bottom combined blown converter |
| CN102864272A (en) * | 2012-10-18 | 2013-01-09 | 吉林建龙钢铁有限责任公司 | Calcite converter steelmaking method |
| CN102864273A (en) * | 2012-10-18 | 2013-01-09 | 吉林建龙钢铁有限责任公司 | Method for increasing converter gas CO recycling amount |
| CN102864276A (en) * | 2012-10-18 | 2013-01-09 | 吉林建龙钢铁有限责任公司 | Converter inactive lime steelmaking method |
| CN102864272B (en) * | 2012-10-18 | 2015-10-28 | 吉林建龙钢铁有限责任公司 | Calcite converter steel making method |
| CN103205523B (en) * | 2013-03-29 | 2014-12-10 | 江苏省沙钢钢铁研究院有限公司 | Novel process for cooling by adopting stones in converter smelting |
| CN103205523A (en) * | 2013-03-29 | 2013-07-17 | 江苏省沙钢钢铁研究院有限公司 | Novel process for cooling by adopting stones in converter smelting |
| CN103333981B (en) * | 2013-06-09 | 2014-09-17 | 武汉钢铁(集团)公司 | Method for smelting high-silicon molten iron by using limestone as slagging material |
| CN103333981A (en) * | 2013-06-09 | 2013-10-02 | 武汉钢铁(集团)公司 | Method for smelting high-silicon molten iron by using limestone as slagging material |
| CN103866079A (en) * | 2014-03-03 | 2014-06-18 | 高志勇 | Zero-lime smelting method for converter steelmaking |
| CN103898272A (en) * | 2014-03-20 | 2014-07-02 | 济钢集团有限公司 | Novel steel-making method by means of small-grain-size limestone |
| CN104073586A (en) * | 2014-07-04 | 2014-10-01 | 秦皇岛首秦金属材料有限公司 | Operating method of converter for smelting low-phosphorus steel by utilizing limestone |
| CN104073586B (en) * | 2014-07-04 | 2016-03-02 | 秦皇岛首秦金属材料有限公司 | A kind of method of converter operation of Wingdale low phosphorus steel by smelting |
| CN105779682B (en) * | 2016-03-16 | 2017-11-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of technique of utilization lime stone smelting stainless steel in dephosphorization converter |
| CN105779682A (en) * | 2016-03-16 | 2016-07-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Process for smelting stainless steel in dephosphorization converter by using limestone |
| CN106636532A (en) * | 2016-09-19 | 2017-05-10 | 中冶宝钢技术服务有限公司 | Limestone mud cake re-production auxiliary material and preparation technique thereof |
| CN106636532B (en) * | 2016-09-19 | 2019-01-22 | 中冶宝钢技术服务有限公司 | Lime stone mud cake returns production auxiliary materials and its preparation process |
| CN106636533A (en) * | 2016-10-17 | 2017-05-10 | 四川省达州钢铁集团有限责任公司 | Slagging method with lime replaced with calcite in converter |
| CN106636533B (en) * | 2016-10-17 | 2019-01-25 | 四川省达州钢铁集团有限责任公司 | With the slagging method of calcite substitution lime in a kind of converter |
| CN109423533A (en) * | 2017-08-25 | 2019-03-05 | 鞍钢股份有限公司 | Full molten iron converter smelting control method |
| CN109423533B (en) * | 2017-08-25 | 2020-09-01 | 鞍钢股份有限公司 | A kind of full-volume molten iron converter smelting control method |
| CN107574281A (en) * | 2017-09-18 | 2018-01-12 | 北京科技大学 | The method that Low-phosphorus Steel or extremely low phosphoretic steel are produced with slagging with Lime stone single slag process |
| CN107574281B (en) * | 2017-09-18 | 2020-01-10 | 北京科技大学 | Method for producing low-phosphorus steel or extremely low-phosphorus steel by limestone slagging-single slag process |
| CN114737011A (en) * | 2022-04-14 | 2022-07-12 | 首钢集团有限公司 | A kind of slagging agent for converter and method for reducing the consumption of converter lime |
| CN114737011B (en) * | 2022-04-14 | 2023-08-11 | 首钢集团有限公司 | Slag former for converter and method for reducing converter lime consumption |
| CN116200569A (en) * | 2023-03-02 | 2023-06-02 | 北京首钢股份有限公司 | Method for smelting steel from limestone |
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| CN101525678B (en) | 2011-01-19 |
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