CN1151902C - Pre-molten protective particle sludge and its production process - Google Patents
Pre-molten protective particle sludge and its production process Download PDFInfo
- Publication number
- CN1151902C CN1151902C CNB011154519A CN01115451A CN1151902C CN 1151902 C CN1151902 C CN 1151902C CN B011154519 A CNB011154519 A CN B011154519A CN 01115451 A CN01115451 A CN 01115451A CN 1151902 C CN1151902 C CN 1151902C
- Authority
- CN
- China
- Prior art keywords
- product
- continuous casting
- slag
- casting
- melting
- 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.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a casting powder product for continuous casting and the production process thereof. The product uses natural mineral substances and industrial waste products as basic slag material, and the basic slag material is mixed with water for preparing slurry after prefused and milled and then is made into products through spray drying. Compared with the protective slag for continuous casting, the product has the characteristics of uniform components, favorable melting and heat insulating properties, uniform melting, favorable lubricating effect, low cost, no split-phase melting during heating, long effective period, etc., and generates no subcutaneous blowholes; the product is not easy to crystallize and absorb the moisture; when the present invention is used as the protecting slag of continuous casting crystallizers, the qualified rate of casting billets can be greatly improved, cracks can be reduced, the advantages of large continuous casting machines can be fully performed, and casting billets with high quality can be produced.
Description
Technical field
The invention belongs to the continuous casting covering slag field, relate to a kind of continuous crystallizer protecting slag product and production technology thereof.
Background technology
Existing continuous crystallizer protecting slag production method adopts mechanical mixing more; mechanical forming method; semi-molten method etc.; with the mechanical forming method is that its basic working procedure of example is: will prepare burden according to the scheme ratio after the raw material fragmentation; pouring system ball dish behind the confected materials ball milling into; under system ball dish rotation situation, add binder solution, make pulverulent material in conjunction with balling-up.Oven dry then, sub-sieve, packing warehouse-in.
Because this production method production cycle is long, difficult quality guarantee, and labor strength is big, is not suitable for big industrial needs.Slag sand is substantially without the sintering fritting, the covering slag of the production deliquescence that easily absorbs water, and the term of validity is short; be rich in the crystallization water, the composition instability is behind the adding crystallizer; form unstable melting layer and non-homogeneous slag film, easily produce harmful slag circle and bleed-out takes place easily, be unfavorable for continuous casting steel machine.
Summary of the invention
The objective of the invention is provides a kind of new continuous crystallizer protecting slag and production technology thereof at some weak point of prior continuous casting protective slag.
A kind of typical ratio range of realizing the pre-melted type covering slag of the object of the invention is:
CaO：20-45％ SiO
2：20-50％ C：0-25％ Al
2O
3：0-15％
BaO：0-15％ MgO：0-15％ SrO：0-15％ CaF
2：0-15％
B
2O
3：0-10％ Na
2O+K
2O：0-15％
With above-mentioned raw materials according to concrete technical scheme proportioning after, water distribution is sized mixing behind fritting, grinding, makes granule product with spray drying tower.Compare with existing continuous casting covering slag; this product composition evenly, melting behaviour and good heat insulating, fusing evenly, high lubricating effect, cost be low, crystalline substance not easy to break when not having phase-splitting fusing, cooling when being heated, be difficult for the moisture absorption and do not produce characteristics such as subcutaneous blowhole, the term of validity be long; can improve the strand qualification rate greatly when using as continuous crystallizer protecting slag; reduce crackle; give full play to the advantage of large-scale continuous casting machine, produce high-quality strand.
The present invention compares with existing continuous crystallizer protecting slag production technology, and the output height is consuming time few, pollutes for a short time, has reduced working strength of workers.
This product uses as continuous crystallizer protecting slag following advantage:
1. high insulating effect prevents that molten steel heat radiation and molten steel face from solidifying crust;
2. spreadability is good, and liquid level is active, prevents secondary oxidation of steel;
3. fusing is evenly conducted heat crystallizer and is stablized;
4. the dross inclusion adsorption ability is strong, and the strand zero defect rate reaches more than 95%;
5. under the situation of liquid level stabilizing, do not produce harmful slag circle;
6. chemical analysis is stable, and water absorption rate is low, and the term of validity is long;
7. molten state is reasonable, is applicable to different casting, the continuous casting production of various steels;
8. basicity is suitable, and there is not short knot effect in molten steel, and generally speaking, the dross bar need not drag for slag, and saving of work and time brings convenience to operation;
9. this product no dust pollution helps operator's physical and mental health;
10. reduction steel-making cost, the slag consumption is low, and ton steel consumption is about 0.5Kg-0.7Kg.
The specific embodiment
Realize that production technology of the present invention is made up of fritting base-material production technology and spray-drying process production technology two big production technologies.
A kind of ratio range of typical pre-molten protective particle sludge is:
CaO：20-45％ SiO
2：20-50％ C：0-25％ Al
2O
3：0-15％
BaO：0-15％ MgO：0-15％ SrO：0-15％ CaF
2：0-15％
B
2O
3：0-10％ Na
2O+K
2O：0-15％
Its concrete production process is:
1. according to technical scheme and each set of dispense ratio of various required raw material, raw material is mixed in proportion.
2. be to melt in the compound input premelt furnace mixed raw material.The duration of heat of compound in stove is 1-3 hour, and the furnace temperature condition is 1000-1500 " C.Carry out the nature cooling after coming out of the stove.
3. cooled pre-melt is become the graininess of granularity less than 3mm with crusher in crushing.
4. with the ball mill grinding of the base-material after the fragmentation, surmise requirement 0-200 order 〉=90%.
5. the water that base-material is allocated into 10%-30% grinds to form mud in stirring water mill.
6. granulate with the spray-drying process tower, the product of a material 0-2mm who makes accounts for more than 90%.
7. the packing of product is put in storage.
The embodiment of pre-molten protective particle sludge of the present invention and production technology:
1. the chemical analysis % of pre-melted type material covering slag
CaO SiO
2?C Al
2O
3 BaO MgO K
2O+Na
2O CaF
2
32 35 2 3 4 5 11 8
2. after above material being prepared, send into the inherent 1000-1500 of premelt furnace continuously " insulation 1-3 hour under the condition of C; it cool off naturally; be broken into the particle of granularity less than 15mm with common jaw crusher; then with kibbler roll once more fragmentation make the base-material granularity less than 3mm, make granularity reach 0-200 order 〉=90% with the ball mill grinding above base-material, add the water of 10-30%; in stirring water mill, grind to form mud, pack after the spray-dried tower granulation and put in storage.
Claims (3)
1, a kind of pre-melted type material covering slag is characterized in that, the consisting of of this covering slag:
CaO：20-45％ SiO
2：20-50％ C：0-25％ Al
2O
3：0-15％
BaO：0-15％ MgO：0-15％ SrO：0-15％ CaF
2：0-15％
B
2O
3：0-10％ Na
2O+K
2O：0-15％
2. technology of producing the described pre-melted type of claim 1 material covering slag; it is characterized in that; with raw material by the preparation of the proportioning described in the claim 1 after, send into the inherent 1000-1500 of premelt furnace continuously " fritting under the temperature of C, carry out fragmentation, grinding, stirring, spray-drying process then.
3. technology according to claim 2 is characterized in that, the product of the covering slag 0-2mm after the spray-dried pelletization treatment is greater than 90%
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011154519A CN1151902C (en) | 2001-04-26 | 2001-04-26 | Pre-molten protective particle sludge and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011154519A CN1151902C (en) | 2001-04-26 | 2001-04-26 | Pre-molten protective particle sludge and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1322597A CN1322597A (en) | 2001-11-21 |
| CN1151902C true CN1151902C (en) | 2004-06-02 |
Family
ID=4661983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011154519A Expired - Fee Related CN1151902C (en) | 2001-04-26 | 2001-04-26 | Pre-molten protective particle sludge and its production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151902C (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318165C (en) * | 2004-02-27 | 2007-05-30 | 宝山钢铁股份有限公司 | Coverage dregs for ladle |
| JP4646849B2 (en) * | 2006-04-25 | 2011-03-09 | 株式会社神戸製鋼所 | Mold powder for continuous casting of high aluminum steel |
| CN100429020C (en) * | 2006-08-25 | 2008-10-29 | 重庆大学 | Protective slag for continuous casting medium thick plate of low alloy high strength steel |
| CN100563871C (en) * | 2006-12-22 | 2009-12-02 | 重庆大学 | A kind of crystallizer protecting cinder for continuous casting of crack sensitive steel and preparation method thereof |
| CN101332497B (en) * | 2007-06-25 | 2010-05-19 | 宝山钢铁股份有限公司 | Continuous casting protection slag for high-alumina steel and manufacture method thereof |
| CN101618442B (en) * | 2008-07-04 | 2011-08-17 | 上海梅山钢铁股份有限公司 | Reductive covering agent for continuous casting tundish |
| CN101722286B (en) * | 2008-10-22 | 2012-04-25 | 宝山钢铁股份有限公司 | Anti-bonding bleed-out continuous casting covering slag |
| KR101159930B1 (en) * | 2009-12-24 | 2012-06-25 | 현대제철 주식회사 | Continuous casting method of impact guarantee beam blank |
| CN101733379B (en) * | 2010-01-21 | 2013-08-21 | 河南省西保冶材集团有限公司 | Carbon-steel crystallizer function protection material in large round billet |
| CN101745616B (en) * | 2010-01-21 | 2013-08-21 | 河南省西保冶材集团有限公司 | Carbon alloy structure steel continuous casting crystallizer function protection material in stainless steel rectangular billet |
| CN101890492A (en) * | 2010-07-08 | 2010-11-24 | 沈阳东大材料先进制备技术工程研究中心 | Slag for liquid pouring of electroslag |
| CN101954464B (en) * | 2010-10-19 | 2015-05-20 | 武汉钢铁(集团)公司 | Low-oxidizability continuous casting covering slag |
| CN102000793B (en) * | 2010-12-01 | 2012-09-05 | 西峡龙成冶金材料有限公司 | Covering slag of large-section round blank pipeline steel continuous casting blank |
| CN102000795A (en) * | 2010-12-09 | 2011-04-06 | 石家庄钢铁有限责任公司 | Protective slag special for continuous casting of high-sulfur steel |
| CN102836979A (en) * | 2011-06-24 | 2012-12-26 | 中冶连铸技术工程股份有限公司 | Tundish covering agent |
| CN102233411B (en) * | 2011-06-27 | 2013-08-21 | 河南通宇冶材集团有限公司 | Low-alkalinity crystallizer covering slag prepared from building waste clay |
| CN102248141B (en) * | 2011-06-27 | 2013-08-21 | 河南通宇冶材集团有限公司 | High-alkalinity mould flux used for niobium/vanadium/titanium-containing low alloy wide and heavy plate blank and manufacturing method thereof |
| CN102825223B (en) * | 2012-07-31 | 2016-08-03 | 马鞍山科润冶金材料有限公司 | A kind of covering slag utilizing the steel-making molding of attapulgite system |
| CN102864285A (en) * | 2012-10-26 | 2013-01-09 | 北京科技大学 | High-alkalinity synthetic slag for pipeline steel secondary refining |
| CN103769556A (en) * | 2014-01-22 | 2014-05-07 | 红安县生伦冶金矿产科技实业有限公司 | Expansion heat-preserving agent |
| CN105642851B (en) * | 2016-03-09 | 2017-12-08 | 西峡龙成冶金材料有限公司 | A kind of sheet slab medium carbon steel continuous crystallizer protecting slag and preparation method thereof |
| CN106001473B (en) * | 2016-06-24 | 2018-12-25 | 中南大学 | A kind of chrome-bearing steel continuous crystallizer protecting slag and its application |
| CN111154950A (en) * | 2019-12-31 | 2020-05-15 | 高英 | Metallurgical heat-insulating covering agent |
| CN114713782B (en) * | 2022-05-10 | 2024-04-02 | 江苏嘉耐高温材料股份有限公司 | Premelting crystallizer covering slag for rare earth stainless steel and preparation method |
| CN117701978A (en) * | 2023-11-27 | 2024-03-15 | 德龙钢铁有限公司 | Production method of 400MPa grade steel for photovoltaic bracket |
-
2001
- 2001-04-26 CN CNB011154519A patent/CN1151902C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1322597A (en) | 2001-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1151902C (en) | Pre-molten protective particle sludge and its production process | |
| CN101502871B (en) | Bloom continuous casting crystallizer covering slag and preparation method thereof | |
| CN103317112B (en) | High-alkalinity crystallizer casting powder for peritectic steel continuous casting and process for preparing high-alkalinity crystallizer casting powder | |
| CN100566887C (en) | The crystallizer protecting residue of special-shaped continuous casting containing manganses low-alloy high strength steel | |
| CN101343680B (en) | Metallurgy type refining slag special for ladle and manufacture method thereof | |
| CN104439133A (en) | Novel casting powder and application thereof | |
| CN1233489C (en) | Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same | |
| CN107931551B (en) | A kind of bloom middle low carbon steel covering slag and preparation method thereof | |
| CN101125357A (en) | Continuous casting crystallizer casting powder for weathering steel and manufacturing method thereof | |
| CN108213365B (en) | A kind of non-reacted covering slag of high-aluminum steel | |
| CN105642851B (en) | A kind of sheet slab medium carbon steel continuous crystallizer protecting slag and preparation method thereof | |
| CN104707958B (en) | Casting peritectic steel high alkalinity continuous casting covering slag | |
| CN110315039B (en) | Application of fluorine-free covering slag in titanium-containing steel continuous casting | |
| CN111531140A (en) | High titanium oxide continuous casting covering slag for titanium-containing steel | |
| CN102233414B (en) | High-aluminum high-manganese type nonmagnetic steel crystallizer covering slag and manufacturing method thereof | |
| CN104707959A (en) | Continuous casting mold flux for automobile sheet | |
| CN113290216A (en) | Casting slag for stainless steel continuous casting and application thereof | |
| CN106498216A (en) | A kind of preparation method of villaumite fusion refining agent | |
| CN105598404B (en) | A kind of shaped blank mild steel continuous crystallizer protecting slag | |
| CN105436446A (en) | Continuous casting mold flux for high-manganese and high-aluminum steel and preparation method thereof | |
| CN106493321A (en) | Steel-making tundish covering flux and preparation method thereof | |
| CN102756103A (en) | Crystallizer casting powder for high-crystallinity high-lubricity continuous casting | |
| KR102676576B1 (en) | Continuous casting protective slag for high titanium steel and method for manufacturing the same | |
| CN1049117A (en) | Presmelting vitrification continuous casting protective slag and production technology thereof | |
| CN111676346A (en) | Refining slag for titanium-containing steel and preparation method and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |