CN102220455A - Production method for high alkalinity steel-making refining slag - Google Patents
Production method for high alkalinity steel-making refining slag Download PDFInfo
- Publication number
- CN102220455A CN102220455A CN2011101922830A CN201110192283A CN102220455A CN 102220455 A CN102220455 A CN 102220455A CN 2011101922830 A CN2011101922830 A CN 2011101922830A CN 201110192283 A CN201110192283 A CN 201110192283A CN 102220455 A CN102220455 A CN 102220455A
- Authority
- CN
- China
- Prior art keywords
- lime
- powder
- kiln
- refining slag
- refining
- 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
- 238000007670 refining Methods 0.000 title claims abstract description 36
- 239000002893 slag Substances 0.000 title claims abstract description 21
- 238000009628 steelmaking Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 51
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 51
- 239000004571 lime Substances 0.000 claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000002161 passivation Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000006184 cosolvent Substances 0.000 claims abstract 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 239000010436 fluorite Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 11
- 238000002844 melting Methods 0.000 abstract description 7
- 230000008018 melting Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 239000002912 waste gas Substances 0.000 abstract description 3
- 235000019738 Limestone Nutrition 0.000 description 4
- 239000006028 limestone Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- 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
- Treatment Of Steel In Its Molten State (AREA)
Abstract
本发明公开了一种高碱度炼钢精炼渣的生产方法，用于炼钢炉外精炼工艺，解决了石灰粉水化和加入石灰块熔化慢的问题。该方法的内容包括：对石灰窑刚烧成的石灰进行破碎和磨粉，将磨成的石灰细粉放入温度为650～750℃的沸腾床内，通入石灰窑烧石灰排出的废气和水蒸气，利用石灰窑烧石灰排出废气中的CO2对石灰表面进行钝化防水化处理，利用水蒸气加速CO2对石灰表面进行的钝化处理。然后将钝化后的石灰粉与助溶剂粉混合，以湿法或干法成球、过筛。本发明具有碱度高、熔化速度快、铺展性好、成本低、存贮时间长的特点。可缩短炼钢炉外精炼时间，提高炼钢炉外精炼工艺钢水脱S脱P率；同时利用了石灰窑烧石灰排出的CO2废气。
The invention discloses a production method of high-alkalinity steelmaking refining slag, which is used in the refining process outside the steelmaking furnace and solves the problems of slow hydration of lime powder and slow melting of added lime blocks. The content of the method includes: crushing and grinding the freshly fired lime in the lime kiln, putting the ground lime fine powder into a fluidized bed with a temperature of 650-750°C, passing through the waste gas discharged from the lime kiln and burning lime. Water vapor, use the CO2 in the exhaust gas from the lime kiln to burn lime to passivate and waterproof the lime surface, and use water vapor to accelerate the passivation treatment of the lime surface by CO2 . Then the passivated lime powder is mixed with co-solvent powder, formed into balls by wet or dry method, and sieved. The invention has the characteristics of high alkalinity, fast melting speed, good spreadability, low cost and long storage time. It can shorten the refining time outside the steelmaking furnace and increase the S and P removal rate of molten steel in the refining process outside the steelmaking furnace; at the same time, it utilizes the CO 2 waste gas discharged from the lime kiln.
Description
Technical field
The present invention relates to make steel the production method of refining slag, particularly a kind of production method of high basicity steel-making refining slag.
Background technology
Steel-making furnace outer refining process molten steel takes off S and takes off P requirement refining slag basicity height, burn-off rate is fast, usually adopt adding lime to improve refining slag basicity, but lime fusing point height (2600 ℃), the fusing point of refining slag increases with the increase of lime adding amount, because the easy aquation of lime powder adds with lime block usually, high basicity refining slag outside steel melting furnace in the refining temperature scope (1600～1700 ℃) burn-off rate slow, influence refining effect, outside steel melting furnace, in the refining cycle, can not give full play to the effect of refining slag.Utilize 50%CaO and 50%Al
2O
3The characteristics of melting point compound about 1400 ℃ adopt lime and bauxitic clay (Al
2O
3Be main) mixing fritting, form about CaO50%, Al
2O
3Calcium aluminate pro-molten refining slag about 40% is used to make steel furnace outer refining process.Though the low fusing speed of calcium aluminate pro-molten refining slag fusing point is fast, but its CaO content requirement of not satisfying high basicity on the low side, also need to add lime block and improve refining slag basicity, the burn-off rate of corresponding prolongation refining slag, calcium aluminate pro-molten refining slag cost is higher simultaneously.If can adopt lime powder to mix the burn-off rate that to accelerate lime refining process outside steel melting furnace with the flux pulvis.The applicant once applied for " production method of water-repellancy high-alkalinity steel-making out-furnace refining slag " patent, and authorized.Granted publication CN1332041C, this patent adopts stearic acid surface passivation agent that the lime fine powder is carried out the passivation preventing hydration and handles, then the lime fine powder after the passivation is mixed with solubility promoter fine powders such as fluorites, with the granularity balling-up of wet method or dry method, be used to make steel furnace outer refining process by the requirement of steel-making furnace outer refining process.Solve the lime powder aquation and added the slow problem of lime block fusing.But surface passivation agent such as stearic acid are undesirable to lime fine powder surface passivation preventing hydration treatment effect.
Summary of the invention
The invention provides a kind of production method of high basicity steel-making refining slag, be used to make steel furnace outer refining process, solved the lime powder aquation and added the slow problem of lime block fusing.
The production method of high basicity steel-making refining slag provided by the invention comprises following content:
The lime that the limestone kiln has just been burnt till carries out fragmentation and abrasive dust, and it is 650～750 ℃ ebullated bed that the lime fine powder of wearing into is put into temperature, feeds waste gas and water vapour that the limestone kiln calcined lime is discharged, utilizes the CO in the calcined lime combustion gas of limestone kiln
2The passivation preventing hydration is carried out on the lime surface handle, utilize water vapour to quicken CO
2The Passivation Treatment that the lime surface is carried out.Then the lime powder after the passivation is mixed with the solubility promoter powder, with wet method or dry method balling-up, sieve.
Described solubility promoter powder adopts fluorite.
The present invention compared with prior art has the high characteristics of basicity, can require to adjust according to the steel-making furnace outer refining process.Burn-off rate is fast, spreadability good, cost is low, waiting time is long.Can shorten the outer refining time of steel melting furnace, improve steel-making furnace outer refining process molten steel and take off the S P removal rate; Utilize the CO in the calcined lime combustion gas of limestone kiln simultaneously
2The passive lime powder reduces CO
2The environmental pollution that produces.
Description of drawings
Fig. 1 is the production method FB(flow block) synoptic diagram of high basicity steel-making refining slag.
Embodiment
As shown in Figure 1, the lime that rotary kiln is produced adds in the Raymond machine and is broken into＜100 purpose fine powders, and the fine powder that mill is good is put into ebullated bed, and the temperature of ebullated bed is controlled at 650～750 ℃.The kiln gas that rotary kiln is discharged carries out the secondary-cleaned dedusting.Through the kiln gas of purifying treatment, CO
2Content about 30%.The heat that utilizes rotary kiln to discharge is produced water vapour by thermoconverter.The kiln gas and the water vapour that purified are fed ebullated bed, the lime fine powder carried out 5～20 minutes surface carbon acidification, then that the lime fine powder cooling back of passivation is mixing with solubility promoter fluorite fine powder, be rolled into or make the block ball that the ball extrusion machine is squeezed into size range 5～20mm by the pelletizing pelletizer, the pack packing of sieving.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, the pack packing of sieving.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101922830A CN102220455A (en) | 2011-07-09 | 2011-07-09 | Production method for high alkalinity steel-making refining slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101922830A CN102220455A (en) | 2011-07-09 | 2011-07-09 | Production method for high alkalinity steel-making refining slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102220455A true CN102220455A (en) | 2011-10-19 |
Family
ID=44777154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101922830A Pending CN102220455A (en) | 2011-07-09 | 2011-07-09 | Production method for high alkalinity steel-making refining slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102220455A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866086A (en) * | 2014-03-19 | 2014-06-18 | 辽宁科技大学 | Production method of double deoxidizer for steelmaking |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743467A (en) * | 2005-10-05 | 2006-03-08 | 鞍山科技大学 | Production method of water-repellent high-alkalinity steelmaking furnace external refining slag |
-
2011
- 2011-07-09 CN CN2011101922830A patent/CN102220455A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743467A (en) * | 2005-10-05 | 2006-03-08 | 鞍山科技大学 | Production method of water-repellent high-alkalinity steelmaking furnace external refining slag |
Non-Patent Citations (2)
| Title |
|---|
| 《武钢技术》 20081031 曹同友等 活性石灰碳酸化的研究 21-23 1-2 第46卷, 第5期 * |
| 《钢铁》 20000930 姜周华等 高流动性防潮石灰粉剂的研制及应用 13-16、23 1-2 第35卷, 第9期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866086A (en) * | 2014-03-19 | 2014-06-18 | 辽宁科技大学 | Production method of double deoxidizer for steelmaking |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12325669B2 (en) | Integrated carbon dioxide capture | |
| CN103757152B (en) | Method and device for treating steel slag | |
| JP5730087B2 (en) | Cement clinker manufacturing method | |
| CN102626670B (en) | Method for preparing high purity iron ore by reducing and magnetizing red mud in rotary kiln | |
| JP6788655B2 (en) | Calcium aluminates manufacturing process | |
| CN101736131B (en) | Pre-melted desulfurizing agent for refining molten steel and preparation method thereof | |
| CN106480310B (en) | Method for removing alkali metal from metallurgical dust and mud | |
| JP5762403B2 (en) | Method for producing aggregate for raw materials charged in blast furnace from metal oxide-containing fine material | |
| JP2018090486A (en) | Titanium-containing aggregate, method for its manufacture, and use thereof | |
| CN105063347B (en) | Method for producing pellets with discarded calcium magnesium bricks | |
| CN103451355B (en) | Production technology of composite slagging agent for steelmaking | |
| CN1720340A (en) | Method of cold pressing agglomerates and pelletizing | |
| CN103509940B (en) | Carbon-containing pellet for manufacturing low-sulfur granular iron | |
| KR20160051680A (en) | Method for preparing steelmaking slags and hydraulic mineral binder | |
| CN102220455A (en) | Production method for high alkalinity steel-making refining slag | |
| JP5729256B2 (en) | Non-calcined hot metal dephosphorization method and hot metal dephosphorization method using non-fired hot metal dephosphorization material | |
| JP6467856B2 (en) | Recycling method of fly ash and non-calcined agglomerated mineral | |
| RU2010133425A (en) | METHOD FOR DISPOSAL OF ELECTRICALLY MELTING FURNACES | |
| RU2487952C1 (en) | Method of making pellets for metallurgy | |
| CN102864270B (en) | Vanadium extraction cooling agent and preparation method thereof | |
| CN102161491A (en) | Preparation method of pre-melted calcium aluminum for steel making | |
| CN103834799A (en) | Method for increasing yield of sintering ore by utilizing siderite | |
| CN101462703A (en) | Method for preparing phosphoric acid and metallurgy additive from middle and low grade phosphate ore | |
| JP2020164346A (en) | Sulfur-based composition and cement composition manufacturing method, and cement composition manufacturing system | |
| CN102815878B (en) | Treatment method of gamma-C2S blast furnace slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111019 |