CN105525059A - Nano molten steel purifying agent and preparation method thereof - Google Patents
Nano molten steel purifying agent and preparation method thereof Download PDFInfo
- Publication number
- CN105525059A CN105525059A CN201510939719.6A CN201510939719A CN105525059A CN 105525059 A CN105525059 A CN 105525059A CN 201510939719 A CN201510939719 A CN 201510939719A CN 105525059 A CN105525059 A CN 105525059A
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- powder
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
- C21C2007/0031—Adding carbon material being plastics, organic compounds, polymers
Abstract
The invention discloses a nano molten steel purifying agent which comprises the following raw materials in part by mass: 2-8 parts of nano SiC2, 10-20 parts of silicon-aluminum alloy powder, 5-16 parts of K2O powder, 3-12 parts of Na2O powder, 5-12 parts of BaO powder, 3-10 parts of CaCO3 powder, 5-8 parts of CaF2 powder, 2-5 parts of Mg powder, 2-6 parts of ferrotitanium powder, the rest of iron powder, 3-8 parts of hydroxypropyl-cellulose and 2-4 parts of water. The nano molten steel purifying agent has the functions of slagging, deoxygenation, desulfuration and dephosphorization, greatly reduces included slag, air holes and cold shut defects in the molten steel, greatly improves the purification degree of molten steel, increases the rate of finished products of products in the steel rolling process, increases the internal and external quality of steel, and effectively removes surface cracks. Under the premise of retaining the original standard requirement, the functions of part of purification equipment are omitted, the steelmaking cost is reduced, the equipment investment is saved, the production processes are reduced, and the energy consumption per unit molten steel is reduced.
Description
Technical field
The present invention relates to metallurgical smelting purification technical field, specifically a kind of nanometer molten steel scavenger and preparation method thereof.
Background technology
Total known iron and steel being in great demand commercially, along with the development of steel industry, more and more higher to the specification of quality of steel, higher requirement be there has also been to the purity of molten steel, molten steel is in smelting process, because steel scrap, iron alloy, refractory materials etc. bring a large amount of impurity and obnoxious flavour into, particularly high quality steel, stainless steel, high temperature steel, containing the higher element such as Cr, Ni, Mo and Nb, Ti, and the carbon content of most of grade of steel is all very low, therefore in smelting process, deoxidation is degassed all more difficult.The inclusion (oxide compound, sulfide etc.) produced in steel not easily floats, and is difficult to discharge, and loosening easily appears in steel ingot, pore, burning into sand, ftracture, scab and the defect such as cold shut, causes the plasticity of steel, the reduction of toughness.
For improving the properties of steel, at present mainly adopt several refinery practice of AOD, VOD, LF to reach the object of purify hot metal in steel-making industry, mainly adopt at casting industry and in molten steel, to add various scavenging agent and rare earth alterative to realize the deoxidation of molten steel, desulfurization and purification.Traditional molten steel scavenger adopts rare earth alloy, silicocalcium, silicon-aluminium-barium alloy etc. usually, but due to this kind of alloy production all need adopt pyrotic smelting, make technological process energy consumption high, seriously polluted, so also cause into molten steel cost and significantly rise.Study new scavenging agent product imperative.
In recent years, nano material obtains gradually in many scientific domains to be paid attention to and application, and nano material has many special performances, as high in toughness, wear resistance is high.Nano material (TiN, SiC, TiC etc.) dispersion size is superfine, have higher hardness and have huge surface energy.Nanometer modifying technology has broken some the conventional rules in the production of iron and steel high-abrasive material.Usually, hardness is improved inevitable with toughness decline in iron and steel high-abrasive material strengthening process, but due to the high surface of Nanoalloy alterant and it in crystal grain thinning process, play dispersion hardening effect, so often can reach the net effect improving alloy rigidity and toughness simultaneously simultaneously.Due to the distinctive character of nano material, how being joined by nanoparticle in ferrous materials liquid is a very difficult problem all the time, and this also governs applications to nanostructures.
Summary of the invention
(1) technical problem solved
For the deficiencies in the prior art, the invention provides a kind of nanometer molten steel scavenger and preparation method thereof, a kind of nanometer molten steel scavenger of the present invention has slag making deoxidation, the function of desulfurization dephosphorization, thus the inclusion significantly reduced in molten steel, reduce the slag inclusion in steel, pore, the defects such as cold shut, increase substantially the degree of purification of molten steel, improve the yield rate of product in System on Rolling Steel, improve the inside and outside quality of steel, effective removal surface crack, under the prerequisite keeping primary standard to require, omit the function of part treating plant, steel performance is identical with LF stove decontamination effect improving, the LF stove for refining can be substituted, steel-making cost can be reduced greatly, save facility investment, reduce production process, reduce unit molten steel energy consumption.
(2) technical scheme
Technical problem to be solved by this invention can be come to be realize by the following technical programs:
A kind of nanometer molten steel scavenger, its raw material is configured to by mass parts: nano SiC 2-8 part, silicon aluminium alloy powder 10-20 part, K
2o powder 5-16 part, Na
2o powder 3-12 part, BaO powder 5-12 part, CaCO
3powder 3-10 part, CaF
2powder 5-8 part, Mg powder 2-5 part, titanium-iron powder 2-6 part, surplus is iron powder, hydroxylated cellulose 3-8 part, moisture 2-4 part.
A kind of nanometer molten steel scavenger, the particle diameter of described nano SiC is less than 50nm.
A preparation method for nanometer molten steel scavenger, operates according to the following steps:
Step one, mixes nano SiC and silicon aluminium alloy powder and forms mixed powder a;
Step 2, mixed powder a, K that step one is obtained
2o powder, Na
2o powder, BaO powder CaCO
3powder and CaF
2powder mixes and forms mixed powder b;
Step 3, mixes described compound b, Mg powder, titanium-iron powder and iron powder and forms composite grain c, adds hydroxylated cellulose and moisture stirs in described composite grain c, finally by the composite grain coldmoulding after stirring.
A preparation method for nanometer molten steel scavenger, described compound c is grains of sand shapes.
(3) beneficial effect
The invention provides a kind of nanometer molten steel scavenger and preparation method thereof, nanometer molten steel scavenger of the present invention is based on potassium, calcium, barium element, add other raw materials such as nano-powder simultaneously, nano-powder is because of high temperature resistant, tiny second-phase nucleus is formed in solidification of molten steel process, increase brilliant core amounts, reach the object of crystal grain thinning, nano-powder is uniformly dispersed and also can be uniformly dispersed after scavenging agent adds molten steel in scavenging agent.Potassium, calcium, barium and other alloy define microalloy or micro-clevis foreign material through high temperature reduction, and microalloy or micro-clevis foreign material produce heterogeneous nuclei again in molten steel, impel grain refining and carbide dislocation to transform, reach a nodularization.The detrimental impurity such as faint carbide, are revolved by brucite, fiber and floating form slag, reach the effect of purify hot metal grain refining, and potassium, calcium, barium element add other alloy of cooperation, improve the deoxidation of scavenging agent, sweetening power;
Nanometer molten steel scavenger of the present invention has the function of slag making deoxidation, desulfurization, dephosphorization, but also there is degasification (H, N, O) function, reduce the defect such as slag inclusion, pore, cold shut in steel, greatly purify molten steel, thus the inner quality of steel and surface quality are significantly improved, particularly the corrodibility of steel and antioxidant are all greatly improved, and the plasticity of steel, toughness are also improved greatly simultaneously, improve the yield rate of product in System on Rolling Steel;
Nanometer molten steel scavenger of the present invention can substitute AOD, VOD, LF stove for refining, can reduce greatly steel-making cost, saves facility investment, reduces production process, reduce unit molten steel energy consumption.Nanometer molten steel scavenger of the present invention, except having the function of excellent cleaning molten steel, also has certain modification effect, improves the interior tissue of iron and steel, improves the mechanical property of iron and steel.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
In the present embodiment nanometer molten steel scavenger raw material and be constructed as follows:
Nano SiC 8 parts, silicon aluminium alloy powder 15 parts, K
211 parts, O powder, Na
25 parts, O powder, 8 parts, BaO powder, CaCO
35 parts, powder, CaF
26 parts, powder, 3 parts, Mg powder, titanium-iron powder 6 parts, iron powder 35 parts, hydroxylated cellulose 3 parts, moisture 4 parts.
Preparation method:
Step one, mixes nano SiC and silicon aluminium alloy powder and forms mixed powder a;
Step 2, mixed powder a, K that step one is obtained
2o powder, Na
2o powder, BaO powder CaCO
3powder and CaF
2powder mixes and forms mixed powder b;
Step 3, mixes described compound b, Mg powder, titanium-iron powder and iron powder and forms composite grain c, adds hydroxylated cellulose and moisture stirs in described composite grain c, finally by the composite grain coldmoulding after stirring.
The nanometer molten steel scavenger prepared by the present embodiment adds in molten steel, and nanometer molten steel scavenger adds by 0.2% of Metal Weight, from bottom ladle to blowing argon gas 4-10 ladle minute (flow 0.5-1Pa), then cast molding.
Embodiment 2:
In the present embodiment nanometer molten steel scavenger raw material and be constructed as follows:
Nano SiC 8 parts, silicon aluminium alloy powder 20 parts, K
210 parts, O powder, Na
210 parts, O powder, 10 parts, BaO powder, CaCO
35 parts, powder, CaF
26 parts, powder, 5 parts, Mg powder, titanium-iron powder 6 parts, iron powder 40 parts, hydroxylated cellulose 5 parts, moisture 4 parts.
The preparation method of the present embodiment is with embodiment 1.
The nanometer molten steel scavenger prepared by the present embodiment adds in molten steel, and nanometer molten steel scavenger adds by 0.4% of Metal Weight, from bottom ladle to blowing argon gas 4-10 ladle minute (flow 0.5-1Pa), then cast molding.
Embodiment 3:
In the present embodiment nanometer molten steel scavenger raw material and be constructed as follows:
Nano SiC 8 parts, silicon aluminium alloy powder 10 parts, K
25 parts, O powder, Na
25 parts, O powder, 5 parts, BaO powder, CaCO
35 parts, powder, CaF
25 parts, powder, 5 parts, Mg powder, titanium-iron powder 3 parts, iron powder 30 parts, hydroxylated cellulose 5 parts, moisture 2 parts.
The preparation method of the present embodiment is with embodiment 1.
The nanometer molten steel scavenger prepared by the present embodiment adds in molten steel, and nanometer molten steel scavenger adds by 0.5% of Metal Weight, from bottom ladle to blowing argon gas 4-10 ladle minute (flow 0.5-1Pa), then cast molding.
Nanometer molten steel scavenger the present invention prepared is used for the die steel H13 that Laigang Special Steel Works is produced, and carry out the test of purification of molten steel, process of the test is as follows:
Molten steel amount 1 ton, nanometer molten steel scavenger addition 10kg, the joining day of nanometer molten steel scavenger adds after adding VN alloy, and nanometer molten steel scavenger adds from blowing argon gas bottom ladle 8 minutes after ladle, casts in molten steel handling scene.
Toughness comparison's table before and after table 1 purifies
| Project | Impact of collision merit (J/cm2) | Transverse impact merit (J/cm2) |
| Die steel H13 | 170 | 22 |
| Die steel H13+ scavenging agent | 225 | 49 |
Toughness comparison's table before and after above-mentioned purification, after adding nanometer scavenging agent of the present invention purification, the toughness of die steel H13 is significantly improved.After testing, impact of collision merit improves 32.3%, and transverse impact merit improves 122.7%, greatly improves mechanical property and the work-ing life of product.
It should be noted that, in this article, such as term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a nanometer molten steel scavenger, is characterized in that its raw material is configured to by mass parts: nano SiC 2-8 part, silicon aluminium alloy powder 10-20 part, K
2o powder 5-16 part, Na
2o powder 3-12 part, BaO powder 5-12 part, CaCO
3powder 3-10 part, CaF
2powder 5-8 part, Mg powder 2-5 part, titanium-iron powder 2-6 part, surplus is iron powder, hydroxylated cellulose 3-8 part, moisture 2-4 part.
2. nanometer molten steel scavenger according to claim 1, is characterized in that: the particle diameter of described nano SiC is less than 50nm.
3. a preparation method for nanometer molten steel scavenger as claimed in claim 1 or 2, is characterized in that operating according to the following steps:
Step one, mixes nano SiC and silicon aluminium alloy powder and forms mixed powder a;
Step 2, mixed powder a, K that step one is obtained
2o powder, Na
2o powder, BaO powder, CaCO
3powder and CaF
2powder mixes and forms mixed powder b;
Step 3, mixes described compound b, Mg powder, titanium-iron powder and iron powder and forms composite grain c, adds hydroxylated cellulose and moisture stirs in described composite grain c, finally by the composite grain coldmoulding after stirring.
4. the preparation method of nanometer molten steel scavenger according to claim 3, is characterized in that described compound c is grains of sand shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510939719.6A CN105525059A (en) | 2015-12-16 | 2015-12-16 | Nano molten steel purifying agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510939719.6A CN105525059A (en) | 2015-12-16 | 2015-12-16 | Nano molten steel purifying agent and preparation method thereof |
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| CN105525059A true CN105525059A (en) | 2016-04-27 |
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| CN201510939719.6A Pending CN105525059A (en) | 2015-12-16 | 2015-12-16 | Nano molten steel purifying agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106566940A (en) * | 2016-11-08 | 2017-04-19 | 潜山县凯创橡塑机械制造有限公司 | Alloy bushing alloy liquid purifying agent and preparation process thereof |
| CN112981043A (en) * | 2021-01-04 | 2021-06-18 | 湖南紫荆新材料科技有限公司 | Fluorine-free molten steel purifying agent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10140229A (en) * | 1996-11-08 | 1998-05-26 | Aikoo Kk | Production of deoxidizing agent for irons and steels, raw material for melting aluminum and iron and steel slag reforming agent |
| CN102676740A (en) * | 2012-05-21 | 2012-09-19 | 合肥开尔纳米能源科技股份有限公司 | Nano composite molten steel purifying agent and preparation method thereof |
| CN102732740A (en) * | 2012-06-27 | 2012-10-17 | 北京京奥泰尔新材料科技有限公司 | Nano-material interalloy modifier and preparation method thereof, and alloy preparation method |
| CN104862450A (en) * | 2015-05-29 | 2015-08-26 | 宁国市华丰耐磨材料有限公司 | Method for enabling nano molten iron purifying modifier to be used in austenite ductile cast iron wear-resistant casting |
-
2015
- 2015-12-16 CN CN201510939719.6A patent/CN105525059A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10140229A (en) * | 1996-11-08 | 1998-05-26 | Aikoo Kk | Production of deoxidizing agent for irons and steels, raw material for melting aluminum and iron and steel slag reforming agent |
| CN102676740A (en) * | 2012-05-21 | 2012-09-19 | 合肥开尔纳米能源科技股份有限公司 | Nano composite molten steel purifying agent and preparation method thereof |
| CN102732740A (en) * | 2012-06-27 | 2012-10-17 | 北京京奥泰尔新材料科技有限公司 | Nano-material interalloy modifier and preparation method thereof, and alloy preparation method |
| CN104862450A (en) * | 2015-05-29 | 2015-08-26 | 宁国市华丰耐磨材料有限公司 | Method for enabling nano molten iron purifying modifier to be used in austenite ductile cast iron wear-resistant casting |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106566940A (en) * | 2016-11-08 | 2017-04-19 | 潜山县凯创橡塑机械制造有限公司 | Alloy bushing alloy liquid purifying agent and preparation process thereof |
| CN112981043A (en) * | 2021-01-04 | 2021-06-18 | 湖南紫荆新材料科技有限公司 | Fluorine-free molten steel purifying agent and preparation method thereof |
| CN112981043B (en) * | 2021-01-04 | 2022-08-26 | 湖南紫荆新材料科技有限公司 | Fluorine-free molten steel purifying agent and preparation method thereof |
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Application publication date: 20160427 |
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