CN107855479A - A kind of molten steel covering agent and its production method - Google Patents
A kind of molten steel covering agent and its production method Download PDFInfo
- Publication number
- CN107855479A CN107855479A CN201711298828.XA CN201711298828A CN107855479A CN 107855479 A CN107855479 A CN 107855479A CN 201711298828 A CN201711298828 A CN 201711298828A CN 107855479 A CN107855479 A CN 107855479A
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- CN
- China
- Prior art keywords
- molten steel
- covering agent
- steel covering
- production method
- layer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of molten steel covering agent and its production method, the production method is stirred by weight percentage to put into 70% one-level flyash, 28% active lime powder and 2% industrial carbonic acid sodium raw materials in mixer, obtains molten steel covering agent.The present invention to industrial residue flyash and active lime powder by recycling, the preparing raw material as molten steel covering agent；The flyash of fines can melt to form melting layer in the short period of time in molten steel covering agent prepared by the present invention, expand with the scope of melting layer, the composition of molten steel covering agent changes, calcium oxide increase in slag, so that the fusing point increase of molten steel covering agent, prevents melting layer to continue to expand, form sinter layer, the top of sinter layer is powdery layer, can reach the purpose for successively weakening heat transfer, can effectively realize the insulation to molten steel in ladle.
Description
Technical field
The present invention relates to iron and steel smelting technology field, especially a kind of molten steel covering agent and its production method.
Background technology
The coal resources very abundant in China, using coal as power generation substantially fuel.The energy industry in China is sent out steadily
Exhibition, generating capacity annual growth are 7.3%, and power industry develops rapidly, brings sharply increasing for flyash discharge capacity, combustion
The flyash total amount that coal steam power plant is discharged every year increases year by year, it is contemplated that was up to 6.2 hundred million tons by 2015, occupies first place in the world.
The development of the national economy and ecological environment of a large amount of discharges of flyash to China cause huge pressure.On the other hand, China is again
It is the limited country of a per capita resource reserve, the comprehensive utilization of flyash, turns waste into wealth, turns bane into boon, it has also become I
An important techno-economic policy in state's economic construction, it is to solve China's power generation environmental pollution, lance between resource shortage
The important means of shield.By exploitation, flyash building materials, backfill, build the road, each field such as agricultural is widely used.But make
It is relatively low with added value.Meanwhile in metallurgical active lime process, crushing process will produce 0~1mm powder materials, should
Material is not directly applicable smelting iron and steel, can only at a low price handle, cause the wasting of resources.
Molten steel covering agent is that a kind of more metallurgic auxiliary materials are used in metallurgy industry, is added in ladle molten steel surface during use, is
A kind of coverture using adiabatic heat-insulation as its main performance.On the premise of current steel industry is increasingly competitive, to reach
Production cost is reduced, the purpose of enterprise profit is improved, the production technology and raw material of molten steel covering agent need to be improved, in the hope of drop
This increasing profit, and the present invention is the method that molten steel covering agent is prepared using the waste material in smelting iron and steel.
The content of the invention
The technical problems to be solved by the invention are：A kind of molten steel covering agent and its production method are provided, by using combustion
Active lime powder both waste resources caused by the flyash and smelting iron and steel of the discharge of coal steam power plant prepare low cost
Molten steel covering agent.
It is to solve above-mentioned technical problem the technical solution adopted in the present invention：A kind of production method of molten steel covering agent,
70% one-level flyash, 28% active lime powder and 2% industrial carbonic acid sodium raw materials are put into mixer by weight percentage
It is stirred, obtains molten steel covering agent.
It is further：Mixing time is 5~10min.
It is further：The granularity of the one-level flyash, active lime powder and industrial carbonic acid sodium raw materials is both less than 1mm.
Present invention also offers the molten steel covering agent prepared by aforementioned production method.
The beneficial effects of the invention are as follows：The present invention by being recycled to industrial residue flyash and active lime powder,
Preparing raw material as molten steel covering agent；Because flyash has that granularity is small, fusing point is low, heap density is small and the characteristics of easily sprawling,
As the composition of being in hospital of molten steel covering agent, easily melting layer is formed on ladle surface；And in active lime powder calcium oxide content it is higher,
Itself fusing point is higher, can improve the fusing point of slag system, but can be formed again with the aluminum oxide in flyash and silica at high temperature
Low-melting compound, the fusing point of slag system is reduced, advantageously form stable sinter layer and powdery layer.Steel prepared by the present invention
The flyash of fines can melt to form melting layer in the short period of time in water coverture, expand with the scope of melting layer
Greatly, the composition of molten steel covering agent changes, the calcium oxide increase in slag, so that the fusing point increase of molten steel covering agent,
Prevent melting layer to continue to expand, form sinter layer, the top of sinter layer be powdery layer, can reach successively decrease heat transfer
Purpose, it can effectively realize the insulation to molten steel in ladle.
Embodiment
For the ease of understanding the present invention, the present invention is further detailed with reference to embodiment.
A kind of production method of molten steel covering agent of the present invention, its technique are by weight percentage by 70% one-level
Flyash, 28% active lime powder and 2% industrial carbonic acid sodium raw materials are as raw materials for production, wherein one-level flyash, active lime
The granularity of powder and industrial carbonic acid sodium raw materials is both less than 1mm；Raw material is put into mixer after dispensing and is stirred, mixing time is
5~10min, you can obtain molten steel covering agent.
Molten steel, which is lost in, in ladle includes convection losses and radiation loss, and the heat preserving method to molten steel is usually in ladle molten steel
Surface adds coverture to reduce thermal loss, when molten steel covering agent is covered in molten steel surface, ladle molten steel upper surface temperature phase
To relatively low, molten steel covering agent comes molten steel and air exclusion so that and convection heat loss and radiations heat energy loss all reduce, from
And play the effect of insulation.The present invention is the recycling to industrial residue flyash and active lime powder, greatly reduces molten steel
The production cost of coverture, and obtained molten steel covering agent can stably form powdery layer, sinter layer and melt on molten steel surface
Melting layer three-decker, this three-decker are to realize the key of molten steel insulation；The industrial residue flyash that Hazards in Power Plant is discharged
With granularity is small, fusing point is low, heap density is small and the characteristics of easily sprawling, easily forms melting layer on ladle surface；And active lime
It can only be discarded with caused powder material due to being not directly applicable smelting iron and steel by broken in process, this is superfine
The active lime powder of granularity, which acts on, but advantageously forms stable sinter layer and powdery layer in molten steel covering agent.
Molten steel covering agent prepared by the present invention can keep one layer of heat preservation, adiabatic powdery on the liquid slag blanket of molten steel
Layer, tissue molten steel is transmitted into air or radiations heat energy, can effectively completely cut off contact of the molten steel with surrounding air, while the right side will not be invaded
Lose cylinder-packing, do not crust after being poured, easily come off from cylinder-packing, the molten steel covering agent reduce tapping temperature, save energy consumption,
Improve yield and all there is beneficial effect in terms of reducing production cost.
Embodiment 1
It is that 0.6mm one-level flyash, 33.6 tons of granularities exist by 84 tons of granularities by taking 120 tons of converter lines of certain factory as an example
The industrial carbonic acid sodium raw materials that active lime powder and 2.4 tons of granularities in the range of 0.2mm~0.5mm are 0.45mm are put into mixer
8min is stirred, stirs and obtains molten steel covering agent.By the way of Manual material feeding, steel is added to the molten steel surface after tapping
Water coverture, its addition is related to ladle top slag thickness, after adding molten steel covering agent, is formed in the short time in molten steel surface
Powdery layer, sinter layer and melting layer three-decker, the effect for successively weakening heat transfer, the insulation to molten steel in ladle are reached
Work well.
Claims (4)
- A kind of 1. production method of molten steel covering agent, it is characterised in that：By weight percentage by 70% one-level flyash, 28% It is stirred in active lime powder and 2% industrial carbonic acid sodium raw materials input mixer, obtains molten steel covering agent.
- A kind of 2. production method of molten steel covering agent as claimed in claim 1, it is characterised in that：Mixing time be 5~ 10min。
- A kind of 3. production method of molten steel covering agent as claimed in claim 1, it is characterised in that：The one-level flyash, work The granularity of property pulverized limestone and industrial carbonic acid sodium raw materials is both less than 1mm.
- A kind of 4. molten steel covering agent, using obtained by the production method as described in claims 1 to 3 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298828.XA CN107855479A (en) | 2017-12-08 | 2017-12-08 | A kind of molten steel covering agent and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298828.XA CN107855479A (en) | 2017-12-08 | 2017-12-08 | A kind of molten steel covering agent and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107855479A true CN107855479A (en) | 2018-03-30 |
Family
ID=61705671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711298828.XA Pending CN107855479A (en) | 2017-12-08 | 2017-12-08 | A kind of molten steel covering agent and its production method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107855479A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06226410A (en) * | 1993-02-01 | 1994-08-16 | Denki Kagaku Kogyo Kk | Insulating material for molten steel |
| DE19728368C1 (en) * | 1997-07-03 | 1999-03-04 | Georg Heller | Insulating material for covering cast steel |
| CN101224489A (en) * | 2008-01-31 | 2008-07-23 | 孙中强 | Covering agent with high melting point and high alkalinity |
| CN102191355A (en) * | 2011-04-07 | 2011-09-21 | 攀钢集团有限公司 | Covering agent for steel smelting, and preparation method thereof |
| EP2407563A1 (en) * | 2010-07-13 | 2012-01-18 | Denain Anzin Métallurgie D.A.MET | Covering powder for liquid steel and method for manufacturing same |
| CN102581240A (en) * | 2011-01-11 | 2012-07-18 | 宝山钢铁股份有限公司 | Tundish covering flux |
| CN102744381A (en) * | 2012-07-25 | 2012-10-24 | 洛阳市科丰冶金新材料（集团）有限公司 | High-alkalinity tundish covering agent |
| CN102794420A (en) * | 2012-08-08 | 2012-11-28 | 江苏大学 | Fluorine-free protecting slag for high-speed continuous casting crystallizer |
| CN103170591A (en) * | 2013-03-05 | 2013-06-26 | 新疆八一钢铁股份有限公司 | Production technology for steel ladle and molten steel covering agent |
| CN104891670A (en) * | 2015-05-07 | 2015-09-09 | 戴祺又 | Environment-friendly type high-efficiency house refuse covering agent and preparation method thereof |
| CN105033207A (en) * | 2015-06-30 | 2015-11-11 | 河南通宇冶材集团有限公司 | Tundish covering agent produced through calcium roasting vanadium-extracted waste residues and preparing method of tundish covering agent |
-
2017
- 2017-12-08 CN CN201711298828.XA patent/CN107855479A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06226410A (en) * | 1993-02-01 | 1994-08-16 | Denki Kagaku Kogyo Kk | Insulating material for molten steel |
| DE19728368C1 (en) * | 1997-07-03 | 1999-03-04 | Georg Heller | Insulating material for covering cast steel |
| CN101224489A (en) * | 2008-01-31 | 2008-07-23 | 孙中强 | Covering agent with high melting point and high alkalinity |
| EP2407563A1 (en) * | 2010-07-13 | 2012-01-18 | Denain Anzin Métallurgie D.A.MET | Covering powder for liquid steel and method for manufacturing same |
| CN102581240A (en) * | 2011-01-11 | 2012-07-18 | 宝山钢铁股份有限公司 | Tundish covering flux |
| CN102191355A (en) * | 2011-04-07 | 2011-09-21 | 攀钢集团有限公司 | Covering agent for steel smelting, and preparation method thereof |
| CN102744381A (en) * | 2012-07-25 | 2012-10-24 | 洛阳市科丰冶金新材料（集团）有限公司 | High-alkalinity tundish covering agent |
| CN102794420A (en) * | 2012-08-08 | 2012-11-28 | 江苏大学 | Fluorine-free protecting slag for high-speed continuous casting crystallizer |
| CN103170591A (en) * | 2013-03-05 | 2013-06-26 | 新疆八一钢铁股份有限公司 | Production technology for steel ladle and molten steel covering agent |
| CN104891670A (en) * | 2015-05-07 | 2015-09-09 | 戴祺又 | Environment-friendly type high-efficiency house refuse covering agent and preparation method thereof |
| CN105033207A (en) * | 2015-06-30 | 2015-11-11 | 河南通宇冶材集团有限公司 | Tundish covering agent produced through calcium roasting vanadium-extracted waste residues and preparing method of tundish covering agent |
Non-Patent Citations (1)
| Title |
|---|
| 王英林等: "球状钢水液面覆盖剂的研究", 《冶金渣处理与利用国际研讨会 ISUS’99 论文集-1》 * |
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Application publication date: 20180330 |