CN103789497A - Preparation method of dephosphorization agent used for stainless steel smelting - Google Patents
Preparation method of dephosphorization agent used for stainless steel smelting Download PDFInfo
- Publication number
- CN103789497A CN103789497A CN201210433620.5A CN201210433620A CN103789497A CN 103789497 A CN103789497 A CN 103789497A CN 201210433620 A CN201210433620 A CN 201210433620A CN 103789497 A CN103789497 A CN 103789497A
- Authority
- CN
- China
- Prior art keywords
- parts
- preparation
- stainless steel
- mixed powder
- steel smelting
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a preparation method of a dephosphorization agent used for stainless steel smelting. The dephosphorization agent is composed of the following components by weight: 28-32 parts of calcium carbonate, 16-20 parts of barium carbonate, 26-28 parts of calcium fluoride, 5-9 parts of chromium oxide, 4-8 parts of quartz sand, and 18-22 parts of magnesium oxide. The preparation method includes: 1) weighing the raw materials according to the weight proportion; 2) crushing the weighed raw materials by a crushing machine, then conducting ball milling to -40 meshes, thus obtaining mixed powder; 3) adding a proper amount of water glass, bentonite or a mixture of water glass and bentonite as a binder into the mixed powder prepared in step 2), and carrying out pressurization pelletizing by a ball press machine; and 4) sending the granulation material into a drying bed to perform drying, and then conducting vacuum packaging.
Description
Technical field
The present invention relates to ferrous metallurgy auxiliary material technical field, relate in particular to the preparation method of a kind of stainless steel smelting dephosphorizing agent.
Background technology
Along with the raising of people's living standard, the usage quantity of Stainless Steel Products is increasing, impels liquid iron pretreatment dephosphorizing operation in Iron And Steel Industry to become the indispensable link of STEELMAKING PRODUCTION.
Because the desired phosphorus content of stainless steel finished product is all below 0.020%, and all process steps does not possess dephosphorization function after electric furnace, this just requires the molten iron phosphorus content after dephosphorization in hot metal pretreatment to be less than 0.008% (Low-phosphorus Steel kind requires phosphorus content≤0.006%).Comparatively speaking, blast furnace or smelting and rducing iron ores iron-smelting furnace (hereinafter to be referred as COREX stove) phosphorus content is basicly stable 0.080%～0.120%, brings larger pressure to liquid iron pretreatment dephosphorizing.
Application for a patent for invention prospectus CN85101003A, the dephosphorization technology of a kind of low-phosphorous high chromium-stainless steel and ultralow phosphorus high chromium-stainless steel is disclosed, the method is the dephosphorization technology of low-phosphorous high chromium-stainless steel, sprays into and in the high-chromium stainless steel fluid in ladle or ladle refining furnace, carries out dephosphorization as dephosphorizing agent with the pulvis of alkali or alkaline-earth metal and alloy thereof.But the method can be suitable for dephosphorization of molten iron pre-treatment.
Application for a patent for invention prospectus CN1876857A, a kind of method take molten iron as main raw material smelting stainless steel is disclosed, the method comprises (1) hot metal pretreatment a desiliconization of hot metal: being main iron scale pulvis blowing process in order to ferric oxide, is that carrier gas powder monitor sprays in molten iron with nitrogen; B dephosphorization of molten iron desulfurization: blow and spray method with pulvis, the dephosphorizing agent nitrogen that is lime and fluorite by main component is that carrier gas powder monitor sprays in molten iron, carries out chemical reaction dephosphorization and desulfurization; (2) carry out preliminary decarburization and cr yield and alloying with top and bottom combined blown converter.
Application for a patent for invention prospectus CN1664127A, discloses a kind of method of dephosphorization of molten iron, desulfurization " what relate to is mainly that flux is added in molten iron with the form of sodium salt rafting.Described is sodium carbonate, sodium sulfate containing sodium salt flux, also contains the material such as sodium-chlor, caustic alkali in flux.
Application for a patent for invention prospectus CN1372009A discloses a kind of molten iron, liquid steel dephosphorization agent, relates to the molten iron for reducing phosphorus content in iron and steel, liquid steel dephosphorization agent in a kind of ironmaking, STEELMAKING PRODUCTION.Dephosphorizing agent is made up of ferric oxide, quickened lime, Calcium Fluoride (Fluorspan).
But dephosphorizing agent or the dephosphorization effect of above-mentioned patent application are bad, or not special designed for stainless steel smelting, therefore, while using in stainless steel smelting, have such or such problem.
Summary of the invention
The object of the invention is to propose the preparation method of a kind of stainless steel smelting dephosphorizing agent, containing the high feature of chromium, prepare specially a kind of dephosphorizing agent that is suitable for its dephosphorization for type of stainless steel.
For reaching this object, the present invention by the following technical solutions:
A preparation method for dephosphorizing agent for stainless steel smelting, described dephosphorizing agent is made up of following component in weight part: calcium carbonate 28-32 part, barium carbonate 16-20 part, Calcium Fluoride (Fluorspan) 26-28 part, chromium sesquioxide 5-9 part, quartz sand 4-8 part, magnesium oxide 18-22 part; Described preparation method is:
1) above-mentioned raw materials is weighed by weight ratio;
2) above-mentioned load weighted raw material is adopted to crusher in crushing, be then milled to-40 orders, obtain mixed powder;
3) using the 2nd) step prepares mixed powder and adds the appropriate water glass as binding agent, wilkinite or glass and bentonitic mixture, and by the ball press pelletizing of pressurizeing;
4) send granulation material to drying bed and be dried, then vacuum packaging.
The present invention compared with prior art has following beneficial effect:
1) the present invention is directed to stainless steel containing the high feature of chromium, add chromium sesquioxide in dephosphorizing agent, that plays act as oxygen gesture required can meet dephosphorization time, the oxidation of chromium can prevent dephosphorization again time.
2) the present invention adopts barium carbonate and Calcium Fluoride (Fluorspan) to coordinate as fusing assistant, makes the fusing point of dephosphorizing agent low, being easy to slag.
3) calcium carbonate and barium carbonate resolve into and in the process of effective constituent CaO and BaO, decompose the CO producing
2gas stirring molten steel can promote reaction, promotes dephosphorization.
4) the present invention adopts the method for granulation, and the method that substitutes fritting can significantly be saved cost, and granulation can also be than directly good by powder result of use.
5) adopt vacuum packaging can avoid the air-breathing efflorescence of the moisture absorption in storage and transportation, the composition activity in use of remaining valid.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with embodiment.
Embodiment mono-
A preparation method for dephosphorizing agent for stainless steel smelting, described dephosphorizing agent is made up of following component in weight part: 28 parts, calcium carbonate, 20 parts of barium carbonates, 26 parts, Calcium Fluoride (Fluorspan), 9 parts of chromium sesquioxides, 4 parts of quartz sands, 22 parts, magnesium oxide; Described preparation method is:
1) above-mentioned raw materials is weighed by weight ratio;
2) above-mentioned load weighted raw material is adopted to crusher in crushing, be then milled to-40 orders, obtain mixed powder;
3) using the 2nd) step prepares mixed powder and adds the appropriate water glass as binding agent, wilkinite or glass and bentonitic mixture, and by the ball press pelletizing of pressurizeing;
4) send granulation material to drying bed and be dried, then vacuum packaging.
Embodiment bis-
A preparation method for dephosphorizing agent for stainless steel smelting, described dephosphorizing agent is made up of following component in weight part: 32 parts, calcium carbonate, 16 parts of barium carbonates, 28 parts, Calcium Fluoride (Fluorspan), 5 parts of chromium sesquioxides, 8 parts of quartz sands, 18 parts, magnesium oxide; Described preparation method is:
1) above-mentioned raw materials is weighed by weight ratio;
2) above-mentioned load weighted raw material is adopted to crusher in crushing, be then milled to-40 orders, obtain mixed powder;
3) using the 2nd) step prepares mixed powder and adds the appropriate water glass as binding agent, wilkinite or glass and bentonitic mixture, and by the ball press pelletizing of pressurizeing;
4) send granulation material to drying bed and be dried, then vacuum packaging.
Embodiment tri-
A preparation method for dephosphorizing agent for stainless steel smelting, described dephosphorizing agent is made up of following component in weight part: 30 parts, calcium carbonate, 18 parts of barium carbonates, 27 parts, Calcium Fluoride (Fluorspan), 7 parts of chromium sesquioxides, 6 parts of quartz sands, 20 parts, magnesium oxide; Described preparation method is:
1) above-mentioned raw materials is weighed by weight ratio;
2) above-mentioned load weighted raw material is adopted to crusher in crushing, be then milled to-40 orders, obtain mixed powder;
3) using the 2nd) step prepares mixed powder and adds the appropriate water glass as binding agent, wilkinite or glass and bentonitic mixture, and by the ball press pelletizing of pressurizeing;
4) send granulation material to drying bed and be dried, then vacuum packaging.
Claims (1)
1. a preparation method for dephosphorizing agent for stainless steel smelting, is characterized in that, described dephosphorizing agent is made up of following component in weight part: calcium carbonate 28-32 part, barium carbonate 16-20 part, Calcium Fluoride (Fluorspan) 26-28 part, chromium sesquioxide 5-9 part, quartz sand 4-8 part, magnesium oxide 18-22 part; Described preparation method is:
1) above-mentioned raw materials is weighed by weight ratio;
2) above-mentioned load weighted raw material is adopted to crusher in crushing, be then milled to-40 orders, obtain mixed powder;
3) using the 2nd) step prepares mixed powder and adds the appropriate water glass as binding agent, wilkinite or glass and bentonitic mixture, and by the ball press pelletizing of pressurizeing;
4) send granulation material to drying bed and be dried, then vacuum packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210433620.5A CN103789497A (en) | 2012-11-03 | 2012-11-03 | Preparation method of dephosphorization agent used for stainless steel smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210433620.5A CN103789497A (en) | 2012-11-03 | 2012-11-03 | Preparation method of dephosphorization agent used for stainless steel smelting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103789497A true CN103789497A (en) | 2014-05-14 |
Family
ID=50665548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210433620.5A Pending CN103789497A (en) | 2012-11-03 | 2012-11-03 | Preparation method of dephosphorization agent used for stainless steel smelting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103789497A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852756A (en) * | 2019-03-06 | 2019-06-07 | 安徽工业大学 | A kind of efficient chromium-containing molten iron pretreatment dephosphorizing agent of few fluorine |
| CN110073009A (en) * | 2016-12-12 | 2019-07-30 | 株式会社Posco | Dephosphorising flux and preparation method thereof |
-
2012
- 2012-11-03 CN CN201210433620.5A patent/CN103789497A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110073009A (en) * | 2016-12-12 | 2019-07-30 | 株式会社Posco | Dephosphorising flux and preparation method thereof |
| CN110073009B (en) * | 2016-12-12 | 2021-10-29 | 株式会社Posco | Dephosphorization flux and preparation method thereof |
| US11225695B2 (en) | 2016-12-12 | 2022-01-18 | Posco | Dephosphorizing flux and method for preparing same |
| CN109852756A (en) * | 2019-03-06 | 2019-06-07 | 安徽工业大学 | A kind of efficient chromium-containing molten iron pretreatment dephosphorizing agent of few fluorine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102586543B (en) | Steel ladle slag reducing agent with high calcium oxide content, and preparation method thereof | |
| CN101560586B (en) | Compound dephosphorization agent with converter slag as raw material and preparing method thereof | |
| CN101717842B (en) | Method for dephosphorization and desulphurization in process of steel production in induction furnace | |
| CN103498016B (en) | Dephosphorization agent prepared by taking slag of decarbonization furnace as raw material and molten iron dephosphorization method | |
| CN101892352B (en) | Arc furnace deep dephosphorization technology and deep dephosphorization agent thereof | |
| CN102010933A (en) | Molten iron dephosphorization agent manufactured by using converter dry-method dust-removal ash as raw material | |
| CN103882181A (en) | Manganese-containing steel alloying process | |
| CN103409595B (en) | Dephosphorization and steel-making method of vanadium-containing molten iron | |
| CN103509940B (en) | Carbon containing pellet for producing low-sulfur grained iron | |
| CN102936640A (en) | Novel technique for smelting stainless steel through RKEF (rotary kiln-electric furnace) and AOD furnace duplex process | |
| CN103789497A (en) | Preparation method of dephosphorization agent used for stainless steel smelting | |
| CN101671756B (en) | Composite fluxing medium for revolving furnace | |
| CN102146500A (en) | Fluxing agent for smelting steel as well as preparation and use methods thereof | |
| CN103160647A (en) | Oxidization dephosphorization agent outside furnace, and preparation and using methods thereof | |
| CN101096722A (en) | Dephosphorising agent for melted iron pretreatment by KR method | |
| CN100560747C (en) | Micro-alloying refined synthetic slag and preparation method thereof | |
| CN103789505A (en) | Preparation method of dephosphorization agent | |
| CN103031409B (en) | Novel process of steelmaking deoxidization by utilizing precipitator dust of refining furnace | |
| CN104212943A (en) | Semisteel smelting technology | |
| CN104087704A (en) | Method for carrying out converter steelmaking by carrying out smelting reduction on waste slag with vanadium extracted | |
| CN108796162B (en) | Rapid dephosphorization method for semisteel smelting converter and steelmaking method | |
| CN1124780A (en) | Dephosphorising agent for iron and steel foam | |
| CN109988887B (en) | Stainless steel pickling sludge pressing ball and preparation method and application thereof | |
| CN112695155A (en) | Steelmaking process of molten iron containing vanadium and titanium | |
| CN103789501A (en) | Dephosphorizing agent for smelting stainless steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140514 |