CN1743467A - 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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- CN1743467A CN1743467A CN 200510047353 CN200510047353A CN1743467A CN 1743467 A CN1743467 A CN 1743467A CN 200510047353 CN200510047353 CN 200510047353 CN 200510047353 A CN200510047353 A CN 200510047353A CN 1743467 A CN1743467 A CN 1743467A
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- lime
- powder
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- fluorite
- refining slag
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Abstract
This invention discloses a production method for refined slag outside of a water-proof high alkali steel-smelting furnace, which applies a method of passivation and water-proof to lime powder to solve the problem of hydrability of lime powder including the following steps: a crushing lime blocks and fluorite into powder smaller than 100 mesh, b adding surface passivating agent into the crushed lime powder to be passivated, c, mixing the passivated lime with the fluorite to be smelted in a device, d, making them into balls with moisture or dry method, e, sieving the refined slag and packaging.
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 true CN1743467A (en) | 2006-03-08 |
| CN1332041C CN1332041C (en) | 2007-08-15 |
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ID=36138991
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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) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1939307A3 (en) * | 2006-12-30 | 2008-07-23 | Qingdao Deshipu Metallurgy Science & Technology Co., Ltd. | Lime-based additive for steel smelting and the preparation method thereof |
| CN102220455A (en) * | 2011-07-09 | 2011-10-19 | 辽宁科技大学 | Production method for high alkalinity steel-making refining slag |
| CN102732679A (en) * | 2012-06-18 | 2012-10-17 | 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 |
Family Cites Families (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 |
| CN1210414C (en) * | 2001-04-30 | 2005-07-13 | 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
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1939307A3 (en) * | 2006-12-30 | 2008-07-23 | Qingdao Deshipu Metallurgy Science & Technology Co., Ltd. | Lime-based additive for steel smelting and the preparation method thereof |
| US7658782B2 (en) * | 2006-12-30 | 2010-02-09 | Qingdao Deshipu Metallurgy Science & Technology Co., Ltd. | Lime-based additive for steel smelting and the preparation method thereof |
| CN102220455A (en) * | 2011-07-09 | 2011-10-19 | 辽宁科技大学 | Production method for high alkalinity steel-making refining slag |
| CN102732679A (en) * | 2012-06-18 | 2012-10-17 | 莱芜钢铁集团有限公司 | Composited desulfurizer for KR, preparation method and application thereof |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN1332041C (en) | 2007-08-15 |
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| C06 | Publication | ||
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| 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 |