CN103789494A - Preparation method of compound steelmaking refining agent - Google Patents
Preparation method of compound steelmaking refining agent Download PDFInfo
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- CN103789494A CN103789494A CN201210434061.XA CN201210434061A CN103789494A CN 103789494 A CN103789494 A CN 103789494A CN 201210434061 A CN201210434061 A CN 201210434061A CN 103789494 A CN103789494 A CN 103789494A
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- refining agent
- calcium
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- 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 compound steelmaking refining agent. The compound steelmaking refining agent comprises the following components in percentage by weight: 3%-4% of calcium carbonate, 30%-40% of calcium oxide, 10%-14% of silicon oxide, 12%-16% of aluminum powder, 4%-6% of magnesium oxide, 6%-10% of sodium carbonate, 4%-6% of calcium fluoride, 3%-5% of calcium carbide, 2%-4% of expanded vermiculite and 6%-10% of kaolin. The preparation method of the compound steelmaking refining agent comprises the following steps of: (1) weighing needed component raw materials according to the proportion of the refining agent, respectively placing into a baking oven for drying, controlling temperature between 120 DEG C and 140 DEG C, and baking for the time of 60-90 minutes; (2) completely baking the raw materials, then placing the raw materials in a dry space, cooling to room temperature, mixing the raw materials, stirring through a crusher to uniformly mix the components; (3) sampling the mixed refining agent for uniformity inspection, packaging after the refining agent is qualified, and storing on a dry position for later use.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, relate in particular to a kind of preparation method who makes steel with refining agent.
Background technology
Oxygen blast operation meeting during because of converter steelmaking in stove makes the Fe in molten steel be oxidized in a large number FeO, thereby cause the FeO in converter slag to increase considerably, and inevitably can bring a large amount of converter slags in ladle when converter tapping, finally make the FeO of ladle slag be in higher scope.The ladle slag of high FeO content has the ability that again passes oxygen to ladle molten steel, increases the total oxygen demand of molten steel, worsens the quality of molten steel.Due in the deoxidation alloying of medium and high carbon steel, often to use a large amount of SiFe, SiMn etc. containing Si alloy simultaneously, generate deoxidation products SiO
2floating can reduce ladle slag basicity after entering ladle slag, affects the receptivity of ladle slag to steel inclusion.Therefore, LF furnace outer refining technology is the key link of converter process production high-quality steel, utilizes refining agent to eliminate or reduce the oxygen delivery capacity of ladle slag to molten steel in this link, requires CaO, SiO in ladle slag according to being mingled with to control simultaneously
2, Al
2o
3, MgO is controlled at certain scope, improves the foaming power of refining agent at LF refining process, regulates LF refining furnace atmosphere, is the core technology that converter+LF technique is smelted high quality molten steel.
" steel-making " magazine in February, 2004 (the 20th 30th～32 pages of the 1st phases of volume, the application of quickened lime in liquid steel refining, the works such as Yu Huacai) has reported that the employing of this steel adds quickened lime and fluorite converter molten steel to be carried out to the technique of refining.This technique is after 120 tons of converter smelting molten steel tappings, in ladle, add the fluorite of 100～150kg quickened lime and quickened lime amount 10%～30% to carry out ladle refining, can improve refining agent basicity, reduce the fusing point of slag, change mobility, to molten steel desulfurizing with improve ladle slag and remove and be mingled with ability and have certain effect.This technique does not possess slag frothing function, and can not eliminate the oxidisability of bringing converter slag in ladle into, has only improved the basicity of ladle slag, has certain de-S effect, cannot realize the Comprehensive Control being mingled with and the secondary oxidation problem of avoiding molten steel in refining process.
" Baogang's science and technology " magazine in April, 2004 (the 30th 38th～41 pages of the 2nd phases of volume, the application of synthetic slag during tapping on converter, the works such as Sun Ligang) has reported that Baogang's employing adds CaO:47.20%～47.30%, SiO in ladle
2: 2.86%～3.01%, Al
2o
3: 42.60%～42.80%, CaF
2: 4.06%～4.26%, Fe
2o
3: 0.76%～0.82%, MgO:0.68%～0.72%, the synthetic slag that fusing point is 1450 ± 50 ℃ carries out the technique of refining to converter molten steel, and this technique can reach 9.1%～34.1% desulfurization degree.This process using special synthetic slag, and sweetening effectiveness is obvious, but does not possess frothing function equally, also has no the report that is mingled with control.
" steel-making " magazine in August, 2004 (the 20th 15th～17 pages of the 4th phases of volume, the process practice of heavy steel steelworks LF, the works such as Hu Bing) has been reported, the technique that heavy steel adopts LF stove white slag Process converter molten steel to be carried out to refining.First this technique control CaO-Al in ladle
2o
3-SiO
2the basicity of slag system, 3.5～4.2, then adds submerged arc slag 2～3kg and refining agent 4～7kg by steel per ton, can form the strong reducing slag (being white slag) of FeO≤1.0.This article has been reported another kind of technique simultaneously, and to add chemical composition be refining composite deoxidization reducer 0.8～1kg that Al:25%, C:36%, active element R are 39% to steel per ton, replaces refining agent.Though this technique has reduced the FeO in ladle slag, making S content in Finished Steel reach 0.005%～0.0012% (average 0.009%), T[O simultaneously] content reaches 15 × 10
-6～34 × 10
-6(average 24 × 10
-6) level, but need submerged arc slag and refining agent to be used in conjunction with while producing, very inconvenience of production operation and management, and T[O] requirement of content and high quality molten steel still has larger gap, have no to be mingled with to control and report.
In a word, refining agent function is more single at present, is difficult to the larger effect of performance in the production of high-quality steel.
Summary of the invention
The object of the present invention is to provide a kind of fusing point low, slagging is fast, has good reducing power and omnidistance foaming power, and can regulate refining furnace atmosphere and realization to be mingled with the preparation method of the multifunctional composite refining agent of Comprehensive Control.
For reaching this object, the present invention by the following technical solutions:
A kind of preparation method who makes steel composite refiner, described refining agent is made up of following component by weight percentage: calcium carbonate 3-4%, calcium oxide 30-40%, silicon oxide 10-14%, aluminium powder 12-16%, magnesium oxide 4-6%, sodium carbonate 6-10%, Calcium Fluoride (Fluorspan) 4-6%, carbide of calcium 3-5%, expanded vermiculite 2-4% and kaolin 6-10%, the preparation method of described steel-making refining agent comprises the following steps:
(1) according to the proportioning of refining agent, weigh after good required each component raw material, put into respectively baking oven to dry, control temperature 120-140 ℃, baking time is 60-90 minute;
(2) after above-mentioned raw materials has been toasted, be put into dry place cool to room temperature, and each raw material is mixed, pulverizer stirs, and composition is mixed;
(3), by mixed refining agent sampling inspection homogeneity, qualified rear packing, leaves dry place in for subsequent use.
Wherein, carbide of calcium and aluminium powder have good restoring function to guarantee refining agent; Calcium carbonate, carbide of calcium and sodium carbonate are to guarantee that refining agent has good frothing function in refining process.
Above-mentioned steel-making adds method to be with composite refiner: in converter tapping process, in ladle, add refining agent 2～4kg/t steel, in LF stove refining process, in ladle, add refining agent 1～5kg/t steel.
The present invention has following beneficial effect:
1) described above, refining agent of the present invention has good reducing power and omnidistance foaming power.
2) refining agent sweetening power of the present invention is high, and finished product molten steel desulfurization degree is more than 82%, and this is mainly to add after it, has strongly reducing atmosphere, foamed white slag, corresponding temperature and suitable these creations of condition of basicity and make sweetening power high in stove.
3) change slag speed is fast, within 4-5 minute, is slagging at LF stove, and forms foamed white slag, and submerged arc heats up effective, and it is strong that slag absorption is mingled with ability, wash heat better function.
4) FeO in ladle slag is dropped to below 1.2%; T[O in finished steel] can drop to 5 × 10
-6～15 × 10
-6scope in; B, C, D class are mingled with grading and are not more than 1.0 grades.
5) physical mixture that composite refiner is various materials, preparation technology is simple, does not need premelt before use, and simple to operate, cost is low.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with embodiment.
Embodiment mono-
A kind of preparation method who makes steel composite refiner, described refining agent is made up of following component by weight percentage: calcium carbonate 3%, calcium oxide 40%, silicon oxide 10%, aluminium powder 16%, magnesium oxide 4%, sodium carbonate 10%, Calcium Fluoride (Fluorspan) 4%, carbide of calcium 5%, expanded vermiculite 2% and kaolin 6%, the preparation method of described steel-making refining agent comprises the following steps:
(1) according to the proportioning of refining agent, weigh after good required each component raw material, put into respectively baking oven to dry, control 120 ℃ of temperature, baking time is 90 minutes;
(2) after above-mentioned raw materials has been toasted, be put into dry place cool to room temperature, and each raw material is mixed, pulverizer stirs, and composition is mixed;
(3), by mixed refining agent sampling inspection homogeneity, qualified rear packing, leaves dry place in for subsequent use.
Embodiment bis-
A kind of preparation method who makes steel composite refiner, described refining agent is made up of following component by weight percentage: calcium carbonate 4%, calcium oxide 30%, silicon oxide 14%, aluminium powder 12%, magnesium oxide 6%, sodium carbonate 10%, Calcium Fluoride (Fluorspan) 6%, carbide of calcium 5%, expanded vermiculite 3% and kaolin 10%, the preparation method of described steel-making refining agent comprises the following steps:
(1) according to the proportioning of refining agent, weigh after good required each component raw material, put into respectively baking oven to dry, control 140 ℃ of temperature, baking time is 60 minutes;
(2) after above-mentioned raw materials has been toasted, be put into dry place cool to room temperature, and each raw material is mixed, pulverizer stirs, and composition is mixed;
(3), by mixed refining agent sampling inspection homogeneity, qualified rear packing, leaves dry place in for subsequent use.
Embodiment tri-
A kind of preparation method who makes steel composite refiner, described refining agent is made up of following component by weight percentage: calcium carbonate 4%, calcium oxide 35%, silicon oxide 12%, aluminium powder 15%, magnesium oxide 4%, sodium carbonate 8%, Calcium Fluoride (Fluorspan) 6%, carbide of calcium 4%, expanded vermiculite 4% and kaolin 8%, the preparation method of described steel-making refining agent comprises the following steps:
(1) according to the proportioning of refining agent, weigh after good required each component raw material, put into respectively baking oven to dry, control 130 ℃ of temperature, baking time is 75 minutes;
(2) after above-mentioned raw materials has been toasted, be put into dry place cool to room temperature, and each raw material is mixed, pulverizer stirs, and composition is mixed;
(3), by mixed refining agent sampling inspection homogeneity, qualified rear packing, leaves dry place in for subsequent use.
Claims (1)
1. make steel the preparation method of composite refiner for one kind, it is characterized in that, described refining agent is made up of following component by weight percentage: calcium carbonate 3-4%, calcium oxide 30-40%, silicon oxide 10-14%, aluminium powder 12-16%, magnesium oxide 4-6%, sodium carbonate 6-10%, Calcium Fluoride (Fluorspan) 4-6%, carbide of calcium 3-5%, expanded vermiculite 2-4% and kaolin 6-10%, the preparation method of described steel-making refining agent comprises the following steps:
(1) according to the proportioning of refining agent, weigh after good required each component raw material, put into respectively baking oven to dry, control temperature 120-140 ℃, baking time is 60-90 minute;
(2) after above-mentioned raw materials has been toasted, be put into dry place cool to room temperature, and each raw material is mixed, pulverizer stirs, and composition is mixed;
(3), by mixed refining agent sampling inspection homogeneity, qualified rear packing, leaves dry place in for subsequent use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434061.XA CN103789494A (en) | 2012-11-03 | 2012-11-03 | Preparation method of compound steelmaking refining agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434061.XA CN103789494A (en) | 2012-11-03 | 2012-11-03 | Preparation method of compound steelmaking refining agent |
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|---|---|
| CN103789494A true CN103789494A (en) | 2014-05-14 |
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|---|---|---|---|
| CN201210434061.XA Pending CN103789494A (en) | 2012-11-03 | 2012-11-03 | Preparation method of compound steelmaking refining agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983904A (en) * | 2017-11-09 | 2018-05-04 | 江山金链精密科技有限公司 | A kind of multistation jumps riveter structure, jump riveter and chain assembling process line waterline |
| CN113502377A (en) * | 2021-08-13 | 2021-10-15 | 马鞍山钢铁股份有限公司 | Rapid reducing agent for ladle top slag and preparation method and use method thereof |
-
2012
- 2012-11-03 CN CN201210434061.XA patent/CN103789494A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983904A (en) * | 2017-11-09 | 2018-05-04 | 江山金链精密科技有限公司 | A kind of multistation jumps riveter structure, jump riveter and chain assembling process line waterline |
| CN107983904B (en) * | 2017-11-09 | 2019-10-18 | 江山金链精密科技有限公司 | A kind of multistation jumps riveter structure, jump riveter and chain assembles process line |
| CN113502377A (en) * | 2021-08-13 | 2021-10-15 | 马鞍山钢铁股份有限公司 | Rapid reducing agent for ladle top slag and preparation method and use method thereof |
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Application publication date: 20140514 |