CN1010193B - Protecting dregs made of residue of boron as the main component for steel smelt-pouring - Google Patents
Protecting dregs made of residue of boron as the main component for steel smelt-pouringInfo
- Publication number
- CN1010193B CN1010193B CN 85107824 CN85107824A CN1010193B CN 1010193 B CN1010193 B CN 1010193B CN 85107824 CN85107824 CN 85107824 CN 85107824 A CN85107824 A CN 85107824A CN 1010193 B CN1010193 B CN 1010193B
- Authority
- CN
- China
- Prior art keywords
- slag
- pouring
- steel
- residue
- boron
- 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
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a new protection slag system in the production process of steel smelting and pouring. Alkaline waste slag containing 33 to 38% of MgO, SiO2Na2OB2O3, etc. generated in the production process of borax is used as principal raw material, and is matched with less than 50% of power plant ashes, high furnace grain slag or more than two kinds of additive agents, such as carbon, etc. to form the protection slag of which the MgO content is between 15 and 28% for steel smelting and pouring. The protection slag has the advantages of poor water absorption, strong impurity adsorption capability, no soldering of poured steel ingots, no carburization, etc. besides the advantages of home or foreign protection slag.
Description
The present invention is the protection slag system that a kind of pouring in steel smelting production process is used.
In the pouring in steel smelting production process, cover the molten steel surface, prevent the molten steel oxidation and molten steel is had the adiabatic heat-insulation effect with covering slag; Covering slag can adsorb the Al in the molten steel uphill process
2O
3Deng non-metallic inclusion; Between ingot mould and solidification of molten steel shell, form the uniform slag film and serve as lubricant.
Existing pouring in steel smelting is to use graphite tailing with covering slag mostly, perlite, power plant's ash and wollastonite etc. add cosolvents such as a certain amount of soda ash, solid water glass, aluminium powder or silicon calcium powder for primary raw material and exothermic mixture formulated.The chemical composition of slag system is to rely on CaO-SiO-Al mostly
2O
3Phasor is adjusted the composition of positive slag, and the cosolvent of adding and exothermic mixture are in order to physical and chemical performances such as the fusing point of adjusting slag, molten speed, viscosity.Though this slag system has satisfied the covering slag that pouring in steel smelting is used substantially, part still has some deficits.Show that mainly this slag system phosphorus content can make steel ingot, the center carburetting of steel cap oral area when higher, phosphorus content is crossed the low steel ingot sticking to mould after cast that makes again.For this reason, the protection slag system of selecting new pouring in steel smelting to use then is a research topic new in the metallurgical industry.
The present invention is based on having selected new protection slag system, i.e. MgO-CaO-SiO in the analysis of original protection slag system and the utilization of resources
2Slag system.
The present invention has SiO concurrently with MgO33～38% that contains that the borax production process produces
2Na
2O and B
2O
3Deng alkaline scrap material is primary raw material, and as required with addition of the power plant's ash below 50%, two or more additives such as blast furnace granulated slag or carbon element form the pouring in steel smelting covering slag of MgO content between 15～28%.
It is composed as follows:
MgO CaO SiO
2Na
2O B
2O
3
15～28% 6～18% 20～38% 2～4% 1～3%
Al
2O
3C other
4～12% 4～16% 1～10%。
Be used for the pouring in steel smelting embodiment with the covering slag of this slag system preparation:
Covering slag composition %:
MgO CaO SiO
2Al
2O
3Na
2O B
2O
3C other
22 16 37 84 2.5 5 is residual
Add at steel per ton under the situation of 2.5kg in order to the cast straight carbon steel, surface of steel ingot first class product rate reaches 90% and absorbs Al
2O
3Field trash increment 200%.Steel ingot is sticking to mould not, not carburetting of ingot head.
The present invention adopts MgO-CaO-SiO
2New slag system makes the Al in the slag
2O
3Content is low, the basicity height of slag, absorption molten steel come-up Al
2O
3The field trash ability is strong; This new slag system utilizes MgCO
3The CO that decomposes produces
2Gas is adjusted the molten speed of slag, and the spreadability of improving slag makes new slag system have good melting characteristic, thereby makes the ingot quality of cast that improvement significantly be arranged.
Raw material of the present invention are industrial residue mostly; no longer in slag, add the high materials of price such as soda ash and solid water glass; make the cost of raw and processed materials of covering slag that decline significantly be arranged, thereby reduced steel-making cost, the natural water absorption rate of slag in storage and transportation reduced.
Claims (1)
- The protection slag system that a kind of pouring in steel smelting is used is characterized in that it is based on borax slag that raw material is formed, its chemical composition:MgO CaO SiO 2Na 2O B 2O 315～28%?6～18% 20～38% 2～4% 1～3%Al 2O 3C other4～12% 4～16% 1～10%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107824 CN1010193B (en) | 1985-10-17 | 1985-10-17 | Protecting dregs made of residue of boron as the main component for steel smelt-pouring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107824 CN1010193B (en) | 1985-10-17 | 1985-10-17 | Protecting dregs made of residue of boron as the main component for steel smelt-pouring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107824A CN85107824A (en) | 1987-04-22 |
| CN1010193B true CN1010193B (en) | 1990-10-31 |
Family
ID=4795797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85107824 Expired CN1010193B (en) | 1985-10-17 | 1985-10-17 | Protecting dregs made of residue of boron as the main component for steel smelt-pouring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010193B (en) |
Families Citing this family (2)
| 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 |
| CN102059330B (en) * | 2011-02-15 | 2013-01-23 | 江苏大学 | Boron-containing fluoride-free covering slag for steel continuous-casting crystallizer and preparation method thereof |
-
1985
- 1985-10-17 CN CN 85107824 patent/CN1010193B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85107824A (en) | 1987-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100465291C (en) | Production tech. of low carbon low silicon aluminium killed steel | |
| CN101519712B (en) | Ladle refining slag modifier, preparation method and slag modifying method | |
| CN101511731A (en) | Process and apparatus for purifying low-grade silicon material | |
| JPS62180010A (en) | Ferrosilicon seeding agent for pig iron | |
| CN102071279A (en) | Slag washing material for converter process production aluminum killed steel and preparation method thereof | |
| CN1056415C (en) | Aluminium-contained premelting slag and preparation method therefor, and molten steel desulfurizer and purifier containing same | |
| CN105734197B (en) | A kind of novel environment friendly synthesizes slag making materials | |
| CN1020335C (en) | Synthetic protector for ingot casting | |
| CN106435310B (en) | A kind of technique with grate ferrosilicon process refining manganese silico-aluminum | |
| JPH06145836A (en) | Production of alloy utilizing aluminum slag | |
| CN1244704C (en) | Light composite steelmaking protective agent (slag) | |
| CN1049117A (en) | Presmelting vitrification continuous casting protective slag and production technology thereof | |
| CN1010193B (en) | Protecting dregs made of residue of boron as the main component for steel smelt-pouring | |
| US2760859A (en) | Metallurgical flux compositions | |
| CN101016578B (en) | Molten steel purifying slag agent produced by blast furnace fusion method | |
| US3865578A (en) | Composition for treating steels | |
| CN1037899C (en) | Mould-casting compound slag without carburation | |
| CN1059364C (en) | Pouring protective slag for electric slag centrifugal casting | |
| CN103243195A (en) | Smelting process of steel ingot for wind power generating motor shaft with high performance | |
| CN1267567C (en) | High-aluminium alloy and its prepn process | |
| CN1032410C (en) | Synthetic skim agent | |
| RU2786789C1 (en) | Active deoxidizer of liquid and refractory hot and cold slags | |
| KR100189297B1 (en) | Method of making melting composite slag | |
| SU1211299A1 (en) | Method of producing aluminium cast iron with compact graphite | |
| CN1332254A (en) | Novel molten steel purifier and its production process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| 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 |