CN102876959A - Method for preparing calcium iron alloy - Google Patents
Method for preparing calcium iron alloy Download PDFInfo
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- CN102876959A CN102876959A CN2012103583328A CN201210358332A CN102876959A CN 102876959 A CN102876959 A CN 102876959A CN 2012103583328 A CN2012103583328 A CN 2012103583328A CN 201210358332 A CN201210358332 A CN 201210358332A CN 102876959 A CN102876959 A CN 102876959A
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- iron
- smelting
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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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
The invention relates to a method for preparing calcium iron alloy. The method comprises the following steps of: selecting 15 to 40 weight percent of calcium and the balance of iron; adding carbon in an amount which is 3 to 5 percent of the total weight of the calcium and the iron into a closed smelting furnace for smelting with the calcium and the iron; introducing excessive combustible gas into space on the upper layer of the smelting furnace and igniting while smelting; adding the excessive combustible gas into a hermetic casting chamber, and igniting; casting alloy liquid obtained after the smelting in the hermetic casting chamber; and packaging cast and cooled alloy hermetically for storing.
Description
Technical field
The invention belongs to field of smelting, refer to especially a kind of preparation method of deoxidant for steelmaking Ca-Fe alloy.
Background technology
In field of steel-making, the high ductility that can reduce metal of oxygen level, impelling strength and antifatigue destructive characteristics, the corrosion resistance nature of reduction metal.Therefore to carry out deoxidation treatment in the steel-making later stage.Carry out at present steel liquid deoxidation and mainly contain three kinds of methods 1) directly deoxidation 2) diffusive deoxidation 3) vacuum deaeration.Directly deoxidation refers to reductor deoxidation with the oxygen direct effect in the molten steel, and reactant is removed by the molten steel come-up.Existing the most frequently used reductor is to contain Ca deoxidizer, mainly be to adopt the Ca-Fe alloy form to join in the molten steel, but calcium belongs to the active metal, and meeting rapid combustion or oxidation in air, therefore making Ca-Fe alloy has certain difficulty.
The method of making at present Ca-Fe alloy all is open melting and casting, therefore the loss of calcium is large, the content of calcium is lower than 10% (weight percent in the Ca-Fe alloy that makes, together lower), and the deoxidation effect of this Ca-Fe alloy is not obvious, therefore, the preparation method who how to reduce the loss of calcium in the Ca-Fe alloy is the target that those skilled in the art are seeking always.
Summary of the invention
The purpose of this invention is to provide a kind of novel method of Ca-Fe alloy refining, in the technical program, can reduce the loss of calcium in the Ca-Fe alloy, improve the content of calcium in the Ca-Fe alloy.
The present invention is achieved by the following technical solutions:
A kind of preparation method of Ca-Fe alloy may further comprise the steps:
1), choose the calcium that weight percent is 15-40%, surplus is iron, the carbon of choosing simultaneously calcium iron total amount weight percent and be 3-5% joins melting in the airtight smelting furnace together;
2), in melting on the smelting furnace sheaf space pass into excessive inflammable gas and light;
3), will seal the excessive inflammable gas of the indoor adding of casting and lighting;
4), the aluminium alloy after the melting is being sealed the indoor casting of casting;
5), the cooled alloy of will casting packs rear preservation.
Described inflammable gas can be a kind of in coal gas, liquefied gas, the natural gas.
The invention has the beneficial effects as follows:
Technical solution of the present invention be to carry out in low-oxygen environment, so the amount of calcium oxidation or burning is less in melting and casting cycle always, and calcium contents improves in the Ca-Fe alloy, also the corresponding utilization ratio that improves calcium.
Embodiment
Below describe technical scheme of the present invention in detail by specific embodiment.
Prepare burden by the requirement of Ca-Fe alloy composition, wherein between 15-40%, certainly as required, this scope can change all not to be affected the technical program calcium by weight percentage, and surplus is iron, also can comprise other element such as aluminium, magnesium etc.The 3-5% that presses simultaneously calcium iron gross weight adds carbon, added hot smelting above respectively the composition in the electric furnace of putting into sealing, in the beginning melting, pass into excessive coal gas in the upper sheaf space of smelting furnace and light, can certainly select liquefied gas or Sweet natural gas, decide on local supply situation; Until melting finishes, at this moment furnace temperature is between 1200-1350 ℃, and alloy all melts.Pass into excessive coal gas and light to the casting of sealing is indoor, then open smelting furnace, aluminium alloy is imported the indoor die casting moulding of casting, from the indoor taking-up alloy of casting of sealing, deposit after chemically examining and packing after the cooling.
In the Ca-Fe alloy by the technical program production, the loss amount of calcium is no more than 10%, compares with prior art, and the utilization ratio of calcium is 4-5 times of existing technology.
Claims (2)
1. the preparation method of a Ca-Fe alloy is characterized in that: may further comprise the steps:
1), choose the calcium that weight percent is 15-40%, surplus is iron, the carbon of choosing simultaneously calcium iron total amount weight percent and be 3-5% joins melting in the airtight smelting furnace together;
2), in melting on the smelting furnace sheaf space pass into excessive inflammable gas and light;
3), will seal the excessive inflammable gas of the indoor adding of casting and lighting;
4), the aluminium alloy after the melting is being sealed the indoor casting of casting;
5), the cooled alloy of will casting packs rear preservation.
2. the preparation method of Ca-Fe alloy according to claim 1 is characterized in that: described inflammable gas can be a kind of in coal gas, liquefied gas, the natural gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103583328A CN102876959A (en) | 2012-09-21 | 2012-09-21 | Method for preparing calcium iron alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103583328A CN102876959A (en) | 2012-09-21 | 2012-09-21 | Method for preparing calcium iron alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102876959A true CN102876959A (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103583328A Pending CN102876959A (en) | 2012-09-21 | 2012-09-21 | Method for preparing calcium iron alloy |
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| CN (1) | CN102876959A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313244A (en) * | 2014-10-29 | 2015-01-28 | 杨雯雯 | Preparation method of deoxidizing agent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696464A (en) * | 2009-10-16 | 2010-04-21 | 谢廷声 | Calcium iron pressing block for liquid steel refining and preparation method thereof |
| CN101709379A (en) * | 2009-12-01 | 2010-05-19 | 陕西盛华冶化有限公司 | Proportioning method of large Fe-Ca-Si alloy electric stove |
| CN101717841A (en) * | 2009-12-18 | 2010-06-02 | 谢廷声 | Ca-Fe alloy and Al-Ca-Fe alloy for steel making and preparation method thereof |
| CN101871073A (en) * | 2010-05-12 | 2010-10-27 | 谢应凯 | Method for preparing calcium-containing ferroalloy |
| CN102864281A (en) * | 2012-09-14 | 2013-01-09 | 黄宣斐 | Preparation method of steelmaking deoxidizer calcium-iron alloy |
-
2012
- 2012-09-21 CN CN2012103583328A patent/CN102876959A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696464A (en) * | 2009-10-16 | 2010-04-21 | 谢廷声 | Calcium iron pressing block for liquid steel refining and preparation method thereof |
| CN101709379A (en) * | 2009-12-01 | 2010-05-19 | 陕西盛华冶化有限公司 | Proportioning method of large Fe-Ca-Si alloy electric stove |
| CN101717841A (en) * | 2009-12-18 | 2010-06-02 | 谢廷声 | Ca-Fe alloy and Al-Ca-Fe alloy for steel making and preparation method thereof |
| CN101871073A (en) * | 2010-05-12 | 2010-10-27 | 谢应凯 | Method for preparing calcium-containing ferroalloy |
| CN102864281A (en) * | 2012-09-14 | 2013-01-09 | 黄宣斐 | Preparation method of steelmaking deoxidizer calcium-iron alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313244A (en) * | 2014-10-29 | 2015-01-28 | 杨雯雯 | Preparation method of deoxidizing agent |
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Application publication date: 20130116 |