CN104073598B - High efficiency composition wash heat agent - Google Patents
High efficiency composition wash heat agent Download PDFInfo
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- CN104073598B CN104073598B CN201410140842.7A CN201410140842A CN104073598B CN 104073598 B CN104073598 B CN 104073598B CN 201410140842 A CN201410140842 A CN 201410140842A CN 104073598 B CN104073598 B CN 104073598B
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a kind of high efficiency composition wash heat agent, its raw material (Wt%) including: calcium powder 49 ~ 70%, aluminum ash 20 ~ 45%, alumina cement 5 ~ 12%, sodium carboxymethyl cellulose 0.5 ~ 2.0%, calcium powder, aluminum ash and alumina cement coordinated desulfurization, and fill mutually the pore structure of refinement wash heat agent, deoxidization desulfuration effect and the absorption of gained high efficiency composition wash heat agent are mingled with effective, slagging speed is fast, has remarkable effect to improving steel plate Enterprise Integrated economic benefit.
Description
Technical field
The invention belongs to smelting iron and steel technical field, be specifically related to a kind of high efficiency composition wash heat agent.
Background technology
Along with the continuous progress of economic development, the prescription of steel is improved, produced at steel by client the most further
How Cheng Zhong, utilize low cost to improve Cleanliness of Molten Steel, and reducing inclusion content of steel is the key expanded market.External refining
Technology is the key obtaining high yield and high quality steel, i.e. uses wash heat and Argon to process, reaches the effect that deoxidization desulfuration goes to be mingled with, full
The foot quality requirements of finished product molten steel, reduces smelting cost simultaneously.
At present conventional wash heat agent is pro-molten refining slag and with CaO-Al2O3-CaF2Based on solid synthetic slag, the former
Production cost is high, energy consumption is high, it is big to pollute；Although the latter can reach the refine requirement of major part steel grade, but the fusing point of this slag
Height, slagging speed is slow, affects rhythm of production, and deep desulfurized effect is undesirable；In slag charge, activity of lime is higher, easily absorbs water
Point, carbon dioxide iso-metamorphism, cause transport and storage on inconvenience.
Aluminum ash is the slag produced in electrolytic aluminium or casting aluminum production technology, and containing metallic aluminium about 15 ~ 20%, remaining mainly becomes
It is divided into Al2O3And SiO2, at present, it being mainly used in electric furnace smelting, aluminum ash is less for refine aspect report, is generally used for desulfurization effect
The research of fruit, in " application of aluminum ash desulfurizing agent in pipe line steel refine " literary composition, have studied and replaced in refining slag by aluminum ash
Al2O3, test desulfurized effect.
Alumina cement is mainly used in building field, composition based on calcium aluminate, alumina content about 50%, at present, high alumina water
Mud has no the report in terms of liquid steel refining substantially, only with respect to calcium aluminate as the document of pro-molten refining slag primary raw material,
In this, generally with CaO and Al2O3Mix by molecular proportion 12:7, therefore referred to as calcium aluminate system refining slag, its calcium oxide content controls
Reduced levels, mentions: calcium aluminate system pre-melted slag in " calcium aluminate pro-molten refining slag desulfurization " literary composition, improves calcium oxide content
Can improve the deoxidizing capacity of calcium aluminate refining slag, but also can cause the rising of its fusion temperature, laboratory research finds, when additional
When calcium oxide content increases to 20%, its desulphurizing ability is declined slightly.
Summary of the invention
The invention aims to make up the deficiencies in the prior art, it is provided that a kind of high efficiency composition wash heat agent, this wash heat agent
Environmental pollution is little, low cost, and deoxidization desulfuration effect and absorption are mingled with effective, and slagging speed is fast.
A kind of high efficiency composition wash heat agent, its raw material (Wt%) including: calcium powder 49 ~ 70%, aluminum ash 20 ~ 45%, alumina cement 5 ~
12%, sodium carboxymethyl cellulose 0.5 ~ 2.0%.
The chemical analysis (Wt%) of described high efficiency composition wash heat agent includes: CaO 30 ~ 50%, Al2O3 20~40%、Al 2~6%、
SiO2≤8%、MgO≤6%、H2O≤1%。
The raw material (Wt%) of described high efficiency composition wash heat agent includes: calcium powder 55 ~ 65%, aluminum ash 22.5 ~ 35%, alumina cement 9.5
~ 12%, sodium carboxymethyl cellulose 0.5 ~ 2.0%.
The chemical analysis (Wt%) of described high efficiency composition wash heat agent includes: CaO 35.5 ~ 45%, Al2O3 23.5~32.7%、Al
2.8~3.9%、SiO2 6.1~7.2%、MgO 4.7~5.5%、H2O 0.53~0.82%。
The raw material of described high efficiency composition wash heat agent requires: calcium powder granularity 0 ~ 3mm, aluminum ash granularity 0 ~ 3mm, high alumina water
Mud pellet degree 150 mesh.
Below in conjunction with beneficial effect, the invention will be further described.
1) adding aluminum ash in raw material, utilize aluminum ash to remove the oxygen in molten steel, deoxidation makes the mobility in wash heat agent strengthen,
Viscosity reduces, and deoxidation, fully in favor of the dynamic conditions of raising desulfurization, makes rate of sulphur expulsion and Sulfur capacity bigger；Calcium powder, aluminum ash with
Alumina cement is respectively provided with desulfidation, when using 49 ~ 70% calcium powders, 20 ~ 45% aluminum ashes and 5 ~ 12% alumina cement, and synergy
Reach optimal, it is possible to be effectively improved desulfurized effect, promote to reach the purpose of deep desulfurization, improve the erosion resistance of furnace lining.
2) containing Al in aluminum ash2O3And SiO2, it is possible to promote the fusing of wash heat agent, it is simple to slagging in advance；The high alumina of 150 mesh
Cement is filled mutually with calcium powder and aluminium powder, it is possible to the pore structure of refinement wash heat agent, it is to avoid cause wash heat agent because aluminum ash content is high
In molten steel, burn-off rate is too fast；Alumina cement and the filling of aluminium powder, reduce the water absorption rate of calcium powder, it is ensured that doing of wash heat agent
Dry, make the water content in wash heat agent be maintained at less than 1%, make wash heat agent be difficult to conglomeration, do not affect using effect, it is to avoid cause steel
Liquid hydrogenation.
3) in raw material added with 0.5 ~ 2.0% additive sodium carboxymethyl cellulose, as binding agent during pelletize, it is possible to protect
Card wash heat agent granule strength and yield rate, obtain good structure sheaf when making slag lotion melting.
4) ferrum oxide in ladle scum silica frost is reduced by metallic aluminium contained in aluminum ash；Al in aluminum ash and alumina cement2O3
Be conducive to the maintenance of foamed slag, make the CaO in wash heat agent contain higher free state, be also beneficial to reduce field trash in molten steel:
Field trash such as SiO in molten steel2、MnO、TiO2, Al2O3 etc., crystal is small, and in the molten steel of big proportion, ascent rate is slow, is difficult to quilt
Common wash heat agent catches and absorbs, and the content high activity of CaO is big, the strongest with the affinity of these field trashes, can make field trash from
Molten steel microstructure separates out, easily forms the macromolecular complex thing such as calcium silicates, Aluminum calcium silicate., thus float to molten steel surface quilt
Composite slag lotion absorbent and assimilation, reduce the inclusion content in molten steel to greatest extent, preferably change the soda acid of bits
Degree, promotes the reaction of slag steel, obtains good desulfurized effect.
5) Al2O3, CaO and MgO be wash heat agent fusion temperature and the major influence factors of viscosity, at Al2O3Content is higher
Time, CaO is bigger than MgO on the impact of fusion temperature, MgO with Al2O3, CaO reciprocal action in time, content of MgO change to wash heat agent
Fusion temperature to affect amplitude more uniform, but because it is relatively big to the viscosity influence of wash heat agent, therefore content of MgO controls below 6%；
By 30 ~ 50%CaO and 20 ~ 40%Al2O3Carry out composition proportion, it is possible to make wash heat agent obtain relatively low fusing point and suitable slag
Viscosity.
6) this wash heat agent uses basic slag system, by adjusting the acid-base value of bits, improves the mobility of bits and absorbs folder
Miscellaneous effect；Containing SiO in wash heat agent2There is certain fluxing action, but during due to content height, be unfavorable for deoxidation, desulfurization, therefore control
System is at SiO2≤8%.MgO and SiO2A small amount of existence can reduce the Mechanism of Formation of The Globular Inclusions in steel, improves impurity-eliminating effect.
7) through on-the-spot test, using this high efficiency composition wash heat agent, the absorption to molten steel is mingled with effect substantially, to greatest extent
Reduce the inclusion content in molten steel, preferably change the acid-base value of bits, effectively instead of original use fritting refine
Slag, reduces environmental pollution, reduces steel-making cost, has remarkable effect to improving steel plate Enterprise Integrated economic benefit.
Specific embodiment
The high efficiency composition wash heat agent of the present invention, the raw material (Wt%) of described wash heat agent includes: calcium powder 49 ~ 70%, aluminum ash 20 ~
45%, alumina cement 5 ~ 12%, CMC 0.5 ~ 2.0%.
The chemical analysis (Wt%) of described high efficiency composition wash heat agent includes: CaO 30 ~ 50%, Al2O3 20~40%、Al 2~6%、
SiO2≤8%、MgO≤6%、H2O≤1%。
Described wash heat agent producing process is:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weighs 55 ~ 70 parts of calcium powders, 20 ~ 45 parts of aluminum
Ash, 5 ~ 12 parts of alumina cements, 0.5 ~ 2.0 part of CMC, stir prepared blended stock；
2. water distribution stirring: add water stirring by blended stock, and amount of water is the 18 ~ 25% of blended stock quality；
Ball the most processed: using conventional disk granulating technique, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 65 ~ 80 DEG C, moisture (Wt%) content≤0.1% after drying, prepare institute
State high efficiency composition wash heat agent.
The using method of described wash heat agent is: when converter or electric furnace steel tapping, in advance high efficiency composition wash heat agent is added steel
Bottom bag, or it is previously added 1/3rd, in time tapping, adds 2/3rds after punching mixed with molten steel.
Below in conjunction with embodiment, the invention will be further described.
Embodiment one
The preparation of the high efficiency composition wash heat agent of the present invention, can be in the steps below:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weigh 49 parts of calcium powders, 45 parts of aluminum ashes, 5 parts
Alumina cement, 1.0 parts of CMC, stir prepared blended stock；
2. water distribution stirring: blended stock 18 parts of water of addition are stirred；
Ball the most processed: using conventional disk granulating technique, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 65 DEG C, after drying, measure gained high efficiency composition slag lotion ingredient bag
Include: CaO 30%, Al2O3 40%、Al 5%、SiO2 7.7%、MgO 8%、H2O 0.3%。
Embodiment two
The preparation of the high efficiency composition wash heat agent of the present invention, can be in the steps below:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weigh 50 parts of calcium powders, 40 parts of aluminum ashes, 8.8
Part alumina cement, 1.2 parts of CMC, stir prepared blended stock；
2. water distribution stirring: blended stock 19 parts of water of addition are stirred；
Ball the most processed: using conventional disk granulating technique, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 69 DEG C, after drying, measure gained high efficiency composition slag lotion ingredient bag
Include: CaO 31.2%, Al2O337%、Al 4.5%、SiO2 8%、MgO 7.8%、H2O 0.35%。
Embodiment three
The preparation of the high efficiency composition wash heat agent of the present invention, can be in the steps below:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weigh 55 parts of calcium powders, 35 parts of aluminum ashes, 9.5
Part alumina cement, 0.5 part of CMC, stir prepared blended stock；
2. water distribution stirring: blended stock 20 parts of water of addition are stirred；
Ball the most processed: using conventional disk granulating technique, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 71 DEG C, after drying, measure gained high efficiency composition slag lotion ingredient bag
Include: CaO 35.5%, Al2O332.7%、Al 3.9%、SiO2 7.2%、MgO 6.5%、H2O 0.53%。
Embodiment four
The preparation of the high efficiency composition wash heat agent of the present invention, can be in the steps below:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weigh 60 parts of calcium powders, 28 parts of aluminum ashes, 11
Part alumina cement, 2.0 parts of CMC, stir prepared blended stock；
2. water distribution stirring: blended stock 22 parts of water of addition are stirred；
Ball the most processed: using conventional disk granulating technique, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 74 DEG C, after drying, measure gained high efficiency composition slag lotion ingredient bag
Include: CaO 39.7%, Al2O3 28%、Al 3.4%、SiO2 6.5%、MgO 5.9%、H2O 0.75%。
Embodiment five
The preparation of the high efficiency composition wash heat agent of the present invention, can be in the steps below:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weigh 65 parts of calcium powders, 22.5 parts of aluminum ashes,
12 parts of alumina cements, 0.5 part of CMC, stir prepared blended stock；
2. water distribution stirring: blended stock 24 parts of water of addition are stirred；
Ball the most processed: using conventional disk granulating technique, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 77 DEG C, after drying, measure gained high efficiency composition slag lotion ingredient bag
Include: CaO 45%, Al2O323.5%、Al 2.8%、SiO2 6.1%、MgO 5.2%、H2O 0.82%。
Embodiment six
The preparation of the high efficiency composition wash heat agent of the present invention, can be in the steps below:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weigh 70 parts of calcium powders, 20 parts of aluminum ashes, 8.5
Part alumina cement, 1.5 parts of CMC, stir prepared blended stock；
2. water distribution stirring: blended stock 25 parts of water of addition are stirred；
Ball the most processed: using conventional disk granulating technique, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 80 DEG C, after drying, measure gained high efficiency composition slag lotion ingredient bag
Include: CaO 50%, Al2O3 20%、Al 2%、SiO2 5.8%、MgO 4.5%、H2O 1.0%。
For six embodiment gained wash heat agent, respectively numbered 1,2,3,4,5,6, carry out following series of experiments:
(1) desulfurized effect: molten steel before certain steel mill's external refining taken from by experiment steel, measure wherein sulfur content be 0.74 ×
10-4, in molten steel, adding this several groups of wash heat agent respectively, in 5min detection molten steel, remain sulfur content, record sulfur content is as follows
Shown in table.
Table experimental data on Integrated comparative, it is known that, in 5min, in molten steel, sulfur content can be from 0.74 × 10-4Be down to (0.49 ~
0.56) × 10-4, 15min is reduced to (0.31 ~ 0.38) × 10-4, early stage desulfurization is rapid；After 30min, sulfur content is basically stable at
(0.19 ~ 0.27) × 10-4Between, the later stage is substantially without returning sulfur phenomenon；Illustrate that this wash heat agent has preferable desulfurized effect；Sulfur in slag
Content reduces 63.5% ~ 74.3%, has reached the purpose of deep desulfurization.
In above-mentioned data, the 3rd, 4,5 groups, 15min sulfur content is reduced to (0.31 ~ 0.34) × 10-4, sulfur content after 30min
It is basically stable at (0.19 ~ 0.23) × 10-4Between, in slag, sulfur content reduces 68.9% ~ 74.3%, and these three groups of deoxidation effects are obvious
It is better than other group time.
(2) deoxidation effect: measuring in (1) before test, in molten steel, oxygen content is 0.5 × 10-5, after measuring its addition wash heat agent
Oxygen content, record oxygen content is as shown in the table.
Table experimental data on Integrated comparative, it is known that, in 5min, in molten steel, oxygen content can be from 0.5 × 10-5Be down to (0.39 ~
0.43) × 10-5, 15min is reduced to (0.25 ~ 0.31) × 10-5, after 30min oxygen content be basically stable at (0.16 ~ 0.23) ×
10-5Between, illustrate that this wash heat agent has preferable deoxidation and absorption deoxidation products is effective, it is possible to meet the need to deoxidation of molten steel
Ask.
In above-mentioned data, the 3rd, 4,5 groups, 15min oxygen content is reduced to (0.30 ~ 0.32) × 10-5, oxygen content after 30min
It is basically stable at (0.15 ~ 0.17) × 10-5Between, these three groups of deoxidation effects are substantially better than other group time.
(3) deoxidation effect: measure in (1) before test, Al in molten steel2O3Content is 2.3 × 10-5, measure it and add wash heat
Oxygen content after agent, record oxygen content is as shown in the table.
Table experimental data on Integrated comparative, it is known that, Al in molten steel in 10min2O3Content can be from 2.3 × 10-5Be down to (1.2 ~
1.6) × 10-5, after 35min, sulfur content is basically stable at (0.5 ~ 0.8) × 10-5Between, illustrate that this wash heat agent dross inclusion adsorption is imitated
The best.
In above-mentioned data, the 3rd, 4,5 groups, Al after 20min2O3Content is reduced to (0.9 ~ 1.0) × 10-5, Al after 35min2O3
Content is basically stable at (0.5 ~ 0.6) × 10-5Between, these three groups absorption are mingled with effect and are substantially better than other group time.
(4) comparative example: from the foregoing, the 4th group of embodiment effect is better than other group, A, B, C in the test of this comparative example
11 parts of alumina cements are replaced with by group respectively: A.4 part aluminium oxide, 7 parts of calcium aluminates；B.5 part aluminium oxide, 6 parts of calcium aluminates；C.6 part
Aluminium oxide, 7 parts of calcium aluminates.The most according to the method described above, sulfur content therein, oxygen content and Al are detected for above-mentioned molten steel2O3Contain
Amount, the most as shown in the table:
Sulfur content:
Oxygen content:
Al2O3Content:
From above-mentioned three tables, after 35min, sulfur content is in (0.28 ~ 0.29) × 10-4, oxygen content be basically stable at (0.22 ~
0.24) × 10-5, Al2O3Content is basically stable at (0.7 ~ 0.8) × 10-5Between, compared with the proportioning of the present invention, effect exists
Gap, the present invention absorbs and is mingled with effect substantially, reduces the inclusion content in molten steel to greatest extent, to improving steel plate enterprise
Overall economic efficiency has remarkable effect.
Claims (4)
1. the production technology of a composite slag lotion, it is characterised in that its raw material (Wt%) including: calcium powder 55～70%, aluminum ash
20～45%, alumina cement 5～12%, sodium carboxymethyl cellulose 0.5～2.0%；
Described wash heat agent producing process is:
1. the inspection of raw and process materials and proportioning: by described composition of raw materials and material requirements, weighs 55～70 parts of calcium powders, 20～45 parts of aluminum
Ash, 5～12 parts of alumina cements, 0.5～2.0 part of CMC, stir prepared blended stock；
2. water distribution stirring: add water stirring by blended stock, and amount of water is the 18～25% of blended stock quality；
Ball the most processed: using disc granulation, the blended stock after adding water makes granule；
4. enter hole to dry: gained granule is dried at 65～80 DEG C, moisture (Wt%) content≤0.1% after drying, prepare institute
State composite slag lotion；
The chemical analysis (Wt%) of described composite slag lotion includes: CaO 30～50%, Al2O320～40%, Al 2～6%,
SiO2≤ 8%, MgO≤6%, H2O≤1%.
2. the production technology of composite slag lotion as claimed in claim 1, it is characterised in that the raw material of described composite slag lotion
(Wt%) including: calcium powder 55～65%, aluminum ash 22.5～35%, alumina cement 9.5～12%, sodium carboxymethyl cellulose 0.5～
2.0%.
3. the production technology of composite slag lotion as claimed in claim 1, it is characterised in that the chemical analysis of described composite slag lotion
(Wt%) including: CaO 35.5～45%, Al2O323.5～32.7%, Al 2.8～3.9%, SiO26.1～7.2%,
MgO4.7～5.5%, H2O 0.53～0.82%.
4. the production technology of composite slag lotion as claimed in claim 1 or 2, it is characterised in that the raw material of described composite slag lotion
Material requirements is: calcium powder granularity 0～3mm, aluminum ash granularity 0～3mm, alumina cement granularity 150 mesh.
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| CN201410140842.7A CN104073598B (en) | 2014-04-08 | 2014-04-08 | High efficiency composition wash heat agent |
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| CN201410140842.7A CN104073598B (en) | 2014-04-08 | 2014-04-08 | High efficiency composition wash heat agent |
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| CN104073598B true CN104073598B (en) | 2016-08-24 |
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| US3893846A (en) * | 1972-07-05 | 1975-07-08 | Aikoh Co | Slag forming agent for steel making |
| CN1348995A (en) * | 2001-09-11 | 2002-05-15 | 重庆工业高等专科学校 | Composite molten steel refining additive |
| CN101545017A (en) * | 2008-03-26 | 2009-09-30 | 上海梅山钢铁股份有限公司 | Ladle slag modifying agent |
| CN101736132A (en) * | 2009-12-31 | 2010-06-16 | 辽宁天和矿产有限公司 | Sintering synthetic slag and production method thereof |
| CN102010939A (en) * | 2010-12-30 | 2011-04-13 | 攀枝花钢城集团瑞钢工业有限公司 | Molten steel refining slags and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155330A1 (en) * | 2011-05-16 | 2012-11-22 | Xiao Weixue | Agent for steelmaking made of aluminium-smelting scum |
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2014
- 2014-04-08 CN CN201410140842.7A patent/CN104073598B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3893846A (en) * | 1972-07-05 | 1975-07-08 | Aikoh Co | Slag forming agent for steel making |
| CN1348995A (en) * | 2001-09-11 | 2002-05-15 | 重庆工业高等专科学校 | Composite molten steel refining additive |
| CN101545017A (en) * | 2008-03-26 | 2009-09-30 | 上海梅山钢铁股份有限公司 | Ladle slag modifying agent |
| CN101736132A (en) * | 2009-12-31 | 2010-06-16 | 辽宁天和矿产有限公司 | Sintering synthetic slag and production method thereof |
| CN102010939A (en) * | 2010-12-30 | 2011-04-13 | 攀枝花钢城集团瑞钢工业有限公司 | Molten steel refining slags and application thereof |
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Inventor after: Cheng Zhuo Inventor after: Song Yanxian Inventor after: Min Yutao Inventor after: Gao Yunqiang Inventor before: Cheng Zhuo Inventor before: Gao Yunqiang |
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Granted publication date: 20160824 Termination date: 20170408 |