CN101260454A - Preparation of calcium-iron alloy for smelting steel by using calcium carbide as raw material and calcium-containing composite desoxidant - Google Patents
Preparation of calcium-iron alloy for smelting steel by using calcium carbide as raw material and calcium-containing composite desoxidant Download PDFInfo
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- CN101260454A CN101260454A CNA2008100111564A CN200810011156A CN101260454A CN 101260454 A CN101260454 A CN 101260454A CN A2008100111564 A CNA2008100111564 A CN A2008100111564A CN 200810011156 A CN200810011156 A CN 200810011156A CN 101260454 A CN101260454 A CN 101260454A
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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 takes a calcium carbide as the raw material to prepare the FE-CA alloys for iron-making and the raw material of a combined deoxidizing agent containing calcium. The preparation methods are as follows: the first method is that the calcium carbide and the iron are placed into an electric furnace to be molten to the FE-CA alloy for the iron-making; or the FE-CA alloy is taken as the middle alloy of the combined deoxidizing agent containing calcium to produce the combined deoxidizing agent containing calcium; the second method is that in the meanwhile of producing the combined deoxidizing agent containing calcium, the calcium carbide is added according to the calcium content to prepare the combined deoxidizing agent containing calcium. The invention has the advantages that the method saves energy, reduces the emission and reduces the pollution, thereby having good economic benefits and social benefits.
Description
Technical field
The present invention is Ca-Fe alloy and the calcareous composite deoxidant that the manufacturing of electricity consumption masonry raw material is used to make steel.
Background technology
Calcium is the strong reductor and the sweetening agent of steel-making, and can also improve the performance of steel, is extensive use of in steel-making, and the production of used calcium of making steel now is the silicocalcium that the reduction with carbon method is produced, and is high energy consumption high pollution project.In calcareous composite deoxidant, all be to add calcium metal and go back the protocalcium remelting to form.As: Al-Mg-Ca-Fe alloy, aluminium manganese Ca-Fe alloy, Al-Ca-Fe alloy etc.The content of calcium can not be greater than 10% in these composite deoxidants, otherwise calcium can burn and turn over stove.Producing calcium metal and going back protocalcium also is the high energy consumption high pollution, and costs an arm and a leg, and improves steel-making cost.For this reason, the present invention develops Ca-Fe alloy and the calcareous composite deoxidant that the manufacturing of electricity consumption masonry raw material is used to make steel.
Summary of the invention
The purpose of this invention is to provide electricity consumption masonry raw material and make Ca-Fe alloy and calcareous composite deoxidant, energy-saving and emission-reduction reduce and pollute, and reduce steel-making cost.
Preparation method of the present invention
According to the chemical property of calcium carbide, it can be developed with the principle that iron at high temperature generates calcium iron.Its manufacture method is that in electric furnace, high temperature (〉=1750 ℃) is smelt Ca-Fe alloy with calcium carbide and iron ore concentrate (or steel scrap, pelletizing, iron scale etc.).This alloy can be directly used in steel-making, substitutes used alloys such as silico-calcium now, also can be as the master alloy of producing calcareous composite deoxidant.When producing calcareous composite deoxidant, can also contain the calcium component requirement by composite deoxidant, earlier by composition requirement proportioning, with calcium carbide and iron fusing, oxygen decarburization adds other raw materials again, is smelt calcareous composite deoxidant in electric furnace.When hot stove is produced in the ore deposit, in order to impel calcium carbide reduction (decarburization), addition portion sub-oxide when melting.As: silica (SiO
2), unslaked lime (CaO), iron ore concentrate (Fe
2O
3), iron scale (FeO), manganese ore (MnO
2), chrome ore (Cr
2O
3), ripe molybdenum ore (Mo
2O
3) etc.These elements all are the required alloying elements of steel-making, and their oxide compound is at reduction calcium carbide (CaC
2) time, these elements generate the alloy that contains these elements with calcium again and use in steel-making.When producing with induction furnace and electric arc furnace, available blow oxygen decarburization, technology is with " carbon rejection processes blowing ferrochrome ".
Production technique of the present invention and embodiment
Its preparation method has two kinds:
First method with iron ore concentrate and calcium carbide proportioning on request, under electric furnace high temperature, is smelt Ca-Fe alloy, uses the blow oxygen decarburization.
Embodiment 1
Proportioning raw materials: iron ore pellet (containing TFe 60%) 100kg, calcium carbide (contains CaC
270%) 50kg.By said ratio, pelletizing and calcium carbide are dropped in the electric furnace, send electrification to close, top blowing oxygen, the ingot casting of coming out of the stove.Chemically examine this product chemical ingredients (quality %):
Ca?32.56％、Fe?64.43％。Impurity: Si 2.11%, S 0.06%, P 0.03%, C 0.51%.Improving the content of calcium in alloy can increase the add-on of calcium carbide, and calcic reaches as high as about 80%.This Ca-Fe alloy can directly use in steel-making.Certain steel mill is with the silicocalcium (Ca28%) of the former usefulness of this alloy replacing, and add-on is 1: 1, reaches the requirement of purify hot metal.
Embodiment 2
Make master alloy with above-mentioned Ca-Fe alloy, substitute the compound golden reductor of magnalium calcium that former technology is produced with calcium metal.
Proportioning raw materials: aluminium ingot 55kg, magnesium ingot 5kg, calcium iron (Ca 33%) 15kg, steel scrap 20kg, unslaked lime 5kg.In line frequency furnace, melt top blowing oxygen decarburization, the ingot casting of coming out of the stove.Chemical ingredients (quality %) through the chemical examination product: Al 53.16%, Mg 4.31%, Ca 4.13%.Impurity: Si 1.51%, C 0.48%, S 0.03%, P 0.03%, surplus are Fe.Certain factory produces magnalium Ca-Fe complex deoxidizer (FeAl
55Mg
5Ca
5), with calcium iron (FeCa
33) the alternative former calcium metal 6kg that uses of alloy 15kg, its product meets quality standard.Certain steel mill is with this alloy deoxidation, and its effect is identical with former magnalium Ca-Fe alloy.
Second method, melts calcium carbide and steel scrap (or iron ore concentrate) earlier with addition of calcium carbide by the requirement of composite deoxidant calcium content in electric furnace, top blowing oxygen drops into other raw materials by proportioning again, makes calcareous magnalium Ca-Fe complex deoxidizer.
Embodiment 3
Proportioning raw materials: aluminium ingot 60kg, calcium carbide 10kg, iron scale (FeO 90%) 40kg.Earlier calcium carbide and steel scrap are melted in electric furnace, top blowing oxygen drops into aluminium ingot again, the ingot casting of coming out of the stove behind the fine melt.Through chemically examining product composition (quality %):
Al 58.13%, Ca 5.16%, surplus is Fe and unavoidable impurities.Produce this product and come out of the stove the former increase of time ratio about 15 minutes.
With above-mentioned two kinds of methods, can produce calcareous composite deoxidant.Identical as aluminium manganese calcium iron, sial calcium iron, aluminium chromium calcium iron, Si-Al-Ba-Ca iron or the like technology.
Embodiment 4
The Ca-Fe alloy that production is used to make steel, used electric furnace removes and uses induction furnace production, also can use the hot stove production of electric arc furnace and ore deposit.But because material such as electrode makes carbon containing higher (C 〉=8%) in the Ca-Fe alloy, with addition of calcium carbide and iron ore concentrate the time, add silica in right amount for this reason, make carbon and silicon formation silicon carbide go into slag, make that carbon reaches iron alloy standard (C≤0.5%) in the alloy.
Embodiment 5
Proportioning raw materials: calcium carbide 100kg, pelletizing 100kg, silica 10kg, decarburizer iron scale (FeO) 10kg, lime (CaO), granularity 5-60mm.By the hot stove production of this proportioning in the 1800KV.A ore deposit.Continuous charging and coming out of the stove was come out of the stove once in per 2 hours, and every stove goes out 1.8 tons of finished products.Chemical examination product chemical ingredients (quality %):
Ca?47.28％、Fe?49.36％。Impurity: Si 2.06%, C 0.54%, S 0.04%, P 0.04%.The product foreign matter content meets the iron alloy standard substantially.
Embodiment 6
Proportioning raw materials: calcium carbide 100kg, iron ore concentrate stone (Fe
2O
360%) 100kg, manganese ore (MnO
2) 50kg.Produce with the hot stove same process in the ore deposit among the embodiment 4.Chemical ingredients (quality %) through the chemical examination product:
Ca?45.16％、Mn?15.38％、Fe?36.94％。Impurity: Si 1.53%, C 0.48%, S 0.03%, P 0.03%.
Claims (4)
1, electricity consumption masonry raw material is made the Ca-Fe alloy that is used to make steel, and it is characterized in that: electricity consumption masonry raw material is made Ca-Fe alloy, contains (quality %) substantially: Ca 10-70%.
2, make the Ca-Fe alloy that is used to make steel according to the electricity consumption masonry raw material described in the claim 1, it is characterized in that: be used to produce the master alloy of calcareous composite deoxidant, contain (quality %) substantially: Ca 10-70%.。
3, electricity consumption masonry raw material is made calcareous composite deoxidant, it is characterized in that: press the composite deoxidant calcium content, with addition of calcium carbide and other raw materials with the stove melting.Contain calcium composite deoxidant and contain (quality %) substantially: Ca 1-30%.
4, according to claim 1 and 3 described electricity consumption masonry raw materials, make the Ca-Fe alloy and the calcareous composite deoxidant that are used to make steel, it is characterized in that with in the oxide compound of elements such as Ca, Fe, Si, Mn, Cr, Mo, Al one or both, make the reductive agent (decarburization) of CaC2, substantially contain in these elements one or both in the alloy, its content is determined according to the quantity of used oxide compound and the content in the oxide compound.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100111564A CN101260454A (en) | 2008-04-23 | 2008-04-23 | Preparation of calcium-iron alloy for smelting steel by using calcium carbide as raw material and calcium-containing composite desoxidant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100111564A CN101260454A (en) | 2008-04-23 | 2008-04-23 | Preparation of calcium-iron alloy for smelting steel by using calcium carbide as raw material and calcium-containing composite desoxidant |
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| CNA2008100111564A Pending CN101260454A (en) | 2008-04-23 | 2008-04-23 | Preparation of calcium-iron alloy for smelting steel by using calcium carbide as raw material and calcium-containing composite desoxidant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559996A (en) * | 2011-12-31 | 2012-07-11 | 淅川县森丽钢铁炉料有限公司 | New silicon-aluminum-barium-calcium multicomponent deoxidation alloy for steelmaking and preparation technology 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 |
| CN103451429A (en) * | 2013-08-21 | 2013-12-18 | 北京科技大学 | Method for smelting aluminum-calcium-iron alloy |
-
2008
- 2008-04-23 CN CNA2008100111564A patent/CN101260454A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827997A (en) * | 2011-06-13 | 2012-12-19 | 谢应旭 | Calcium carbide ferro-aluminium alloy used for smelting steel, and preparation method thereof |
| CN102559996A (en) * | 2011-12-31 | 2012-07-11 | 淅川县森丽钢铁炉料有限公司 | New silicon-aluminum-barium-calcium multicomponent deoxidation alloy for steelmaking and preparation technology thereof |
| CN103451429A (en) * | 2013-08-21 | 2013-12-18 | 北京科技大学 | Method for smelting aluminum-calcium-iron alloy |
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Open date: 20080910 |