CN105441633A - Preparation method of magnesium-aluminium composite oxygen scavenger - Google Patents
Preparation method of magnesium-aluminium composite oxygen scavenger Download PDFInfo
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- CN105441633A CN105441633A CN201410416382.6A CN201410416382A CN105441633A CN 105441633 A CN105441633 A CN 105441633A CN 201410416382 A CN201410416382 A CN 201410416382A CN 105441633 A CN105441633 A CN 105441633A
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- oxygen scavenger
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Abstract
The invention discloses a preparation method of a magnesium-aluminium composite oxygen scavenger. The composite oxygen scavenger comprises the following components: 25-55 weight% of Al, 5-8 weight% of Ca, less than or equal to 7 weight% of Mn, less than or equal to 5 weight% of C, less than or equal to 25 weight% of Fe, and the balance being Mg. The components are combined according to the ratio, firstly iron is added into an electric furnace for dissolving at a high temperature for 30-40 minutes, the rest components are added, the temperature is raised to 1000 DEG C, after the components are uniformly dissolved, and the components are cooled for forming a product.
Description
Technical field
The present invention relates to a kind of preparation method of the Mg-Al composite oxygen scavenger for molten steel deoxygenation in refining steel.
Background technology
In process for making, the refining of steel is the important step in industry always, and in steelmaking process, the content reducing the oxygen of molten steel is particularly crucial and important.Oxygen usually exists in the form of the oxide in molten steel.If containing nonmetal oxide in steel, have huge destroying infection to the powerful of steel, so the oxygen removed in steel is the vital task of process for making.Aluminium applies oxygen scavenger material very widely at present, cheap, efficient, obtains high market accreditation.But the problem of aluminium is, the aluminium sesquioxide that aluminium becomes with the rear profile of oxygen reaction, the performance (such as thermotolerance, resistance to fatigue etc.) doing material to finished product has damage in various degree, cuts the hidden danger that there is continous casting sprue dross.Simple aluminium because proportion is comparatively light, not easily with in sinking to bottom molten steel, make deoxygenation thorough not, waste raw material, interests cannot maximize.In recent years, occurred that a lot of alloy material solves the defect of fine aluminium reductor.What the such as name of Chinese patent 1718751A Granted publication was called that " calcium barium calcium manganese aluminium iron composite deoxidant and its production and use " provide is called containing the silicon barium calcium compound oxygen scavenger of manganese and the name of Chinese patent 1916190A Granted publication the calcium alloy reductor etc. that " compound deoxidizer in calcium series " proposes.But these two kinds of defects all existed in various degree, the former is containing proportional many manganese, iron, and the deoxygenation speed of response of manganese, iron is partially slow, and this makes its deaerating effect be difficult to reach efficient; The calcium system deoxidation of the latter, although efficiency is pretty good, in the program, the accounting of calcium is close to 50%, considers that the market value of calcium is far longer than the conventional oxygen scavenging material such as aluminium, so the cost of the program is inevitable expensive, cost is not little.
Summary of the invention
For the various deficiencies of above existing scheme, the object of the present invention is to provide a kind of efficient, thorough, and the preparation method of lower-cost Mg-Al composite oxygen scavenger.Both solve the product defects that aluminium deoxygenation causes, avoid again the economic cost that expensive material is brought.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of preparation method of Mg-Al composite oxygen scavenger, is characterized in that comprising the following steps:
The first step, gets Al:25 ~ 55% by weight percentage; Ca:5 ~ 8%; Mn :≤7%; C :≤5%; Fe :≤25%; Mg: surplus;
Second step, first puts into electric furnace and smelts 30 minutes to 40 minutes by iron;
3rd step, adds aluminium, magnesium, and then smelts 13 minutes through 1000 celsius temperatures after iron fusing;
4th step, adds Mn, C, Ca simultaneously, pours cooling forming in mould after Homogeneous phase mixing into.
The advantage of present method:
1., based on magnalium, than traditional aluminium oxygen scavenger, improve deaerating effect greatly.
2. reduce the ratio of Ca, than silicon barium calcium compound oxygen scavenger common now, cost reduces, more cheap.
Embodiment
Embodiment 1
A kind of Mg-Al composite oxygen scavenger, is characterized in that comprising following rent part forms by weight ratio:
The Mg of Al:45%, Ca:6%, Mn:3%, C:1%, Fe:15% and surplus.
The preparation method of Mg-Al composite oxygen scavenger of the present invention is as follows:
First iron is put into electric furnace through the smelting of 30 minutes to 40 minutes, after iron fusing, add aluminium, magnesium, and then smelt 13 minutes through 1000 celsius temperatures, then add Mn, C, Ca in the lump, after Homogeneous phase mixing, pour cooling forming in mould into.
Embodiment 2
Prepare burden according to the method for embodiment 1, make oxygen scavenger, and make the weight ratio of aluminium, magnesium, calcium, carbon, iron, manganese be:
The Mg of Al:40%, Ca:5%, Mn:1%, C:1%, Fe:25% and surplus.
The preparation method of Mg-Al composite oxygen scavenger of the present invention is as follows:
First iron is put into electric furnace through the smelting of 30 minutes to 40 minutes, disposablely after iron fusing add residue component: Al, Mg, Mn, C, Ca, then heat to 1000 degrees Celsius, continue 5 ~ 6 minutes, after Homogeneous phase mixing, pour cooling forming in mould into.
Claims (6)
1. a preparation method for Mg-Al composite oxygen scavenger, is characterized in that comprising the following steps:
The first step, gets Al:25-55% by weight percentage; Ca:5-8%; Mn :≤7%; C :≤5%; Fe :≤25%; Mg: surplus;
Second step, first puts into electric furnace and smelts 30 minutes to 40 minutes by iron;
3rd step, adds aluminium, magnesium, and then smelts 13 minutes through 1000 celsius temperatures after iron fusing;
4th step, adds Mn, C, Ca simultaneously, pours cooling forming in mould after Homogeneous phase mixing into.
2. the preparation method of Mg-Al composite oxygen scavenger according to claim 1, is characterized in that: comprise following proportioning composition (by weight percentage):
Al:40-45%Mg: surplus
Ca:7-8％Mn:5-7％
C:3-4％Fe:≤10％。
3. the preparation method of magnesium Mg-Al composite oxygen scavenger according to claim 1, is characterized in that described Ca and C is prepared by carbide of calcium.
4. the preparation method of Mg-Al composite oxygen scavenger according to claim 1, is characterized in that described Al is aluminium powder.
5. the preparation method of Mg-Al composite oxygen scavenger according to claim 1, is characterized in that described Mg is magnesium powder.
6. the preparation method of Mg-Al composite oxygen scavenger according to claim 1, is characterized in that described Mn is for through H
2the passivation MnO of reduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416382.6A CN105441633A (en) | 2014-08-21 | 2014-08-21 | Preparation method of magnesium-aluminium composite oxygen scavenger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416382.6A CN105441633A (en) | 2014-08-21 | 2014-08-21 | Preparation method of magnesium-aluminium composite oxygen scavenger |
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| Publication Number | Publication Date |
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| CN105441633A true CN105441633A (en) | 2016-03-30 |
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| CN201410416382.6A Pending CN105441633A (en) | 2014-08-21 | 2014-08-21 | Preparation method of magnesium-aluminium composite oxygen scavenger |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317584A (en) * | 2001-03-28 | 2001-10-17 | 何丽华 | Al-Mg alloy for deoxidizing and desulfurizing in smelting steel |
| CN1908198A (en) * | 2006-08-18 | 2007-02-07 | 沈阳东北大学冶金技术研究所有限公司 | Aluminum-magnesium alloy deoxidizer for smelting steel and preparation method thereof |
| CN101050481A (en) * | 2007-05-11 | 2007-10-10 | 李兴有 | Composite alloy of Al - Mg - Ca - Fe with lower carbon, silicon, phosphor, and sulfur in use for final steelmaking deoxidizer |
| CN101086028A (en) * | 2007-07-13 | 2007-12-12 | 谢应凯 | Composite deoxidizing agent aluminum-calcium-iron alloy for smelting steel |
| CN101418365A (en) * | 2008-11-13 | 2009-04-29 | 北京科技大学 | Magnesia-alumina-ferroalloy and preparation method thereof |
| CN102827997A (en) * | 2011-06-13 | 2012-12-19 | 谢应旭 | Calcium carbide ferro-aluminium alloy used for smelting steel, and preparation method thereof |
| CN102978340A (en) * | 2012-11-26 | 2013-03-20 | 张桂芬 | Steelmaking deoxidizing agent and preparation method thereof |
-
2014
- 2014-08-21 CN CN201410416382.6A patent/CN105441633A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317584A (en) * | 2001-03-28 | 2001-10-17 | 何丽华 | Al-Mg alloy for deoxidizing and desulfurizing in smelting steel |
| CN1908198A (en) * | 2006-08-18 | 2007-02-07 | 沈阳东北大学冶金技术研究所有限公司 | Aluminum-magnesium alloy deoxidizer for smelting steel and preparation method thereof |
| CN101050481A (en) * | 2007-05-11 | 2007-10-10 | 李兴有 | Composite alloy of Al - Mg - Ca - Fe with lower carbon, silicon, phosphor, and sulfur in use for final steelmaking deoxidizer |
| CN101086028A (en) * | 2007-07-13 | 2007-12-12 | 谢应凯 | Composite deoxidizing agent aluminum-calcium-iron alloy for smelting steel |
| CN101418365A (en) * | 2008-11-13 | 2009-04-29 | 北京科技大学 | Magnesia-alumina-ferroalloy and preparation method thereof |
| CN102827997A (en) * | 2011-06-13 | 2012-12-19 | 谢应旭 | Calcium carbide ferro-aluminium alloy used for smelting steel, and preparation method thereof |
| CN102978340A (en) * | 2012-11-26 | 2013-03-20 | 张桂芬 | Steelmaking deoxidizing agent and preparation method thereof |
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Application publication date: 20160330 |