CN1332041C - Water-repellancy high-alkalinity steel-making out-furnace refining slag production method - Google Patents
Water-repellancy high-alkalinity steel-making out-furnace refining slag production method Download PDFInfo
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- CN1332041C CN1332041C CNB2005100473538A CN200510047353A CN1332041C CN 1332041 C CN1332041 C CN 1332041C CN B2005100473538 A CNB2005100473538 A CN B2005100473538A CN 200510047353 A CN200510047353 A CN 200510047353A CN 1332041 C CN1332041 C CN 1332041C
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- Prior art keywords
- lime
- steel
- powder
- refining slag
- furnace refining
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- 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.)
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- 238000007670 refining Methods 0.000 title claims abstract description 35
- 239000002893 slag Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000009628 steelmaking Methods 0.000 title claims description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 38
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 38
- 239000004571 lime Substances 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 238000002161 passivation Methods 0.000 claims abstract description 13
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000010436 fluorite Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 206010033799 Paralysis Diseases 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- 238000002844 melting Methods 0.000 abstract description 12
- 230000008018 melting Effects 0.000 abstract description 8
- 230000036571 hydration Effects 0.000 abstract description 3
- 238000006703 hydration reaction Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract 4
- 238000001035 drying Methods 0.000 abstract 1
- 239000011812 mixed powder Substances 0.000 abstract 1
- 238000003860 storage Methods 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Details (AREA)
Abstract
The present invention discloses a production method for a water-proof high-alkalinity steel-melting outer-furnace refining slag. The method aims at the characteristic of easy hydration of lime powder to adopt the lime powder to carry out passivation water-proof processing, and solves the problems of hydration of the lime powder and slowly melting with the addition of lime blocks. The present invention is characterized in that the method has the following operation steps: a. the lime blocks and fluorite are respectively broken to from powder preparation less than 100 meshes; b. the broken lime powder preparation is added to surface passivator for carrying out the passivation processing; c. the passivated lime powder preparation is mixed with fluorite powder, and then, the passivated lime powder enters mixing-refinement equipment to be refined in a mixing mode; d, the mixed powder preparation which is good mixed and refined carries out balling by a wetting method, or a drying method; e, the spherical refining slag is sieved and packaged. The outer-furnace refining slag produced by the production method provided in the present invention has the characteristics of high alkalinity, rapid melting speed, long storage time, etc., and the present invention has the advantages that the steel-melting outer-furnace refining time can be shortened, the S-shedding and P-shedding rate of a steel-melting outer-furnace refining process for molten steel is improved; the process of the method self is simple, and compared with the existing method, the production cost is low.
Description
Technical field
The present invention relates to the production method of the outer concise slag of metallurgical steel melting furnace, especially a kind of production method of water-repellancy high-alkalinity steel-making out-furnace refining slag
Background technology
Along with the raising that the user requires steel product quality, the steel-making furnace outer refining technology draws attention.Refining slag takes off S to molten steel and takes off P influence big in the steel-making furnace outer refining process, and molten steel S, P content directly influence steel product quality.Steel-making furnace outer refining process molten steel takes off S and takes off P requirement refining slag basicity (CaO%/SiO
2%) height, though can adopt to add lime (CaO) and improve refining slag basicity, the lime fusing point is up to 2600 ℃, and burn-off rate is slow in 1600～1700 ℃ of the refining process temperature ranges outside steel melting furnace, outside steel melting furnace, in the refining cycle, can not give full play to and take off S and take off the P effect.Adopt lime powder can accelerate the burn-off rate of lime refining process outside steel melting furnace, but the easy aquation of lime powder, pulvis in use easily floats outstanding on-the-spot pollution that form simultaneously.Utilize 50%CaO and 50%Al at present
2O
3Melting point compound adopts lime and the mixing fritting of bauxitic clay 1300～1500 ℃ characteristics, forms about CaO50%, Al
2O
3Pro-molten refining slag about 40% is used to make steel furnace outer refining process.As the patent No. is CN200410097754.X " furnace external refining agent and method for making thereof ", adds bauxitic clay with Wingdale exactly and puts into stove and make scouring agent.Though the low fusing speed of above-mentioned refining pre-melted slag fusing point is fast, its CaO content is low, when molten steel takes off S deeply, also need to add the large quantities of lime piece and improve refining slag basicity, because the fusing of adding lime block is slower, and the outer refining time of corresponding prolongation steel melting furnace.The pro-molten refining slag production cost is higher simultaneously.
Summary of the invention
The present invention is directed to the characteristics of the easy aquation of lime powder, adopt lime powder is carried out the processing of passivation preventing hydration, then the lime powder after the passivation is mixed with the fluorite pulvis,, solved the lime powder aquation and added the slow problem of lime block fusing with wet method or dry method balling-up.
The production method operation steps of water-repellancy high-alkalinity steel-making out-furnace refining slag provided by the invention is as follows:
A, lime block and fluorite joined respectively in two disintegrating apparatus be broken for＜100 purpose pulvis;
B, again with fragmentation good＜100 order lime powders add 0.1～2% stearic acid surface passivation agent of lime block weight, are put in the paralysis facility, carry out the lime powder Passivation Treatment;
C, with after the passivation＜100 purpose lime powders mix with＜100 order fluorite powder, blending ratio is: lime powder 90～60%, fluorite pulvis 10～40%, it is mixing to enter mixing facilities then;
D, the mixing powder that mixes is put into balling-up equipment with wet method or dry method balling-up;
E, spherical refining slag is sieved, packs.
The furnace steel refining slag that steel-making furnace steel refining slag production method provided by the invention is produced has characteristics such as basicity height, burn-off rate is fast, waiting time is long, can shorten the outer refining time of steel melting furnace, improves steel-making furnace outer refining process molten steel and takes off the S P removal rate; The technology of method own is simple, and is lower than existing method production cost.
Description of drawings
Fig. 1 is the process frame chart of the production method of water-repellancy high-alkalinity steel-making out-furnace refining slag.
Embodiment
As shown in Figure 1, the production method operation steps of water-repellancy high-alkalinity steel-making out-furnace refining slag provided by the invention is as follows:
A, general＜20mm lime block and fluorite add in the Raymond machine respectively and are broken into＜100 purpose pulvis;
B, again with fragmentation good＜100 order lime powders add 0.5～1% stearic acid surface passivation agent of lime block weight, are put in the quick peeler paralysis facility, carry out the lime powder Passivation Treatment;
C, with after the passivation＜100 purpose lime powders mix with＜100 order fluorite powder, blending ratio is: lime powder 70%, fluorite pulvis 30% enters in the bevel-type mixing facilities mixing 30～60 minutes then;
D, the mixing powder that mixes is added 1%～3% binding agent with wet method, by making the block ball that the ball extrusion machine is squeezed into size range 5～20mm; Or with dry method by 1～3 MPa pressing machine directly with the mixing powder that mixes, be pressed into the block ball of size range 5～30mm;
E, block ball refining slag is sieved, packs.
Claims (1)
1, a kind of production method of water-repellancy high-alkalinity steel-making out-furnace refining slag is characterized in that this method operation steps is as follows:
A, lime block and fluorite joined respectively in two disintegrating apparatus be broken for＜100 purpose pulvis;
B, again with fragmentation good＜100 order lime powders add 0.1～2% stearic acid surface passivation agent of lime block weight, are put in the paralysis facility, carry out the lime powder Passivation Treatment;
C, with after the passivation＜100 purpose lime powders mix with＜100 order fluorite powder, blending ratio is: lime powder 90～60%, fluorite pulvis 10～40%, it is mixing to enter mixing facilities then;
D, the mixing powder that mixes is put into balling-up equipment with wet method or dry method balling-up;
E, spherical refining slag is sieved, packs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100473538A CN1332041C (en) | 2005-10-05 | 2005-10-05 | Water-repellancy high-alkalinity steel-making out-furnace refining slag production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100473538A CN1332041C (en) | 2005-10-05 | 2005-10-05 | Water-repellancy high-alkalinity steel-making out-furnace refining slag production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1743467A CN1743467A (en) | 2006-03-08 |
| CN1332041C true CN1332041C (en) | 2007-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100473538A Expired - Fee Related CN1332041C (en) | 2005-10-05 | 2005-10-05 | Water-repellancy high-alkalinity steel-making out-furnace refining slag production method |
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| CN (1) | CN1332041C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535133C (en) * | 2006-12-30 | 2009-09-02 | 李继宗 | Steel making lime additive and its production process |
| CN102220455A (en) * | 2011-07-09 | 2011-10-19 | 辽宁科技大学 | Production method for high alkalinity steel-making refining slag |
| CN102732679B (en) * | 2012-06-18 | 2014-11-05 | 莱芜钢铁集团有限公司 | Composited desulfurizer for KR, preparation method and application thereof |
| CN103866086A (en) * | 2014-03-19 | 2014-06-18 | 辽宁科技大学 | Production method of double deoxidizer for steelmaking |
| CN110184418A (en) * | 2019-06-28 | 2019-08-30 | 张家港市永兴建材厂 | A kind of external desulfurzation agent preparation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317585A (en) * | 2001-03-30 | 2001-10-17 | 盛富春 | Composite desulfurizing agent for iron and steel and its preparing process |
| CN1384213A (en) * | 2001-04-30 | 2002-12-11 | 沈阳东北大学冶金技术研究所 | Binary deactivated blown non-metal powder and its prepn |
| CN1441066A (en) * | 2003-03-31 | 2003-09-10 | 鞍山市安力耐火材料有限公司 | Slagging aluminium ball and its making process |
| CN1477213A (en) * | 2003-06-05 | 2004-02-25 | 范玉全 | Compound desulfurizing agent for molten iron |
-
2005
- 2005-10-05 CN CNB2005100473538A patent/CN1332041C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317585A (en) * | 2001-03-30 | 2001-10-17 | 盛富春 | Composite desulfurizing agent for iron and steel and its preparing process |
| CN1384213A (en) * | 2001-04-30 | 2002-12-11 | 沈阳东北大学冶金技术研究所 | Binary deactivated blown non-metal powder and its prepn |
| CN1441066A (en) * | 2003-03-31 | 2003-09-10 | 鞍山市安力耐火材料有限公司 | Slagging aluminium ball and its making process |
| CN1477213A (en) * | 2003-06-05 | 2004-02-25 | 范玉全 | Compound desulfurizing agent for molten iron |
Non-Patent Citations (1)
| Title |
|---|
| 铸铁用石灰基复合脱硫剂的研究和发展 严青松等，现代铸铁，第4期 1998 * |
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| CN1743467A (en) | 2006-03-08 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Anshan He Feng Refractory Material Co., Ltd. Assignor: Liaoning Science and Technology Univ. Contract fulfillment period: 2007.10.15 to 2017.10.14 contract change Contract record no.: 2009210000021 Denomination of invention: Water-repellancy high-alkalinity steel-making out-furnace refining slag production method Granted publication date: 20070815 License type: Exclusive license Record date: 2009.3.18 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.10.15 TO 2017.10.14; CHANGE OF CONTRACT Name of requester: ANSHAN CITY HEFENG FIREPROOF MATERIALS CO., LTD. Effective date: 20090318 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070815 Termination date: 20111005 |