CN102847933A - High-temperature wear-resistant material adapted to lining of blast-furnace tuyere and preparation method of high-temperature wear-resistant material - Google Patents
High-temperature wear-resistant material adapted to lining of blast-furnace tuyere and preparation method of high-temperature wear-resistant material Download PDFInfo
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- CN102847933A CN102847933A CN2012103345724A CN201210334572A CN102847933A CN 102847933 A CN102847933 A CN 102847933A CN 2012103345724 A CN2012103345724 A CN 2012103345724A CN 201210334572 A CN201210334572 A CN 201210334572A CN 102847933 A CN102847933 A CN 102847933A
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Abstract
The invention relates to a high-temperature wear-resistant material for a lining of a blast-furnace tuyere sleeve, which is prepared by the following raw materials in percentage by weight: 40-60% of nano copper powder, 36-56% of nano tungsten powder, 0.2-0.65% of iron powder and 4-6% of chromium powder. Metal conducts plastic deformation and is molten and diffused at high temperature and high pressure and by the aging effect at the high temperature and the high pressure, so that the high-temperature wear-resistant tungsten copper material is obtained. The high-temperature wear-resistant material is good in heat-conducting property, high-temperature strength and high-temperature wear-resistant property, can realize metallurgical bonding with a fine copper substrate, and can be used for manufacturing the lining of the blast-furnace tuyere sleeve, which is good in wear-resistant property and long in service life; the wear-resistant property of the blast-furnace tuyere sleeve can be improved greatly; and the service life of the blast-furnace tuyere sleeve can be prolonged greatly.
Description
Technical field
The present invention relates to a kind of high-temperature and wear-proof, relate in particular to a kind of high-temperature and wear-proof that is adapted to the blast-furnace tuyere liner and preparation method thereof.
Background technology
Ironmaking or steel-making blast furnace are by the blast-furnace tuyere put on it heat air delivery in the blast furnace, to provide oxygen to satisfy the needs of smelting the pig iron, wherein nearer apart from the higher blast-furnace roasting district of temperature as the blast-furnace tuyere of inner sleeve air port use, blast-furnace tuyere will bear the heat radiation of combustion zone and the impact of convection current, also bearing the wearing and tearing of decline logistics, washing away of the abrasion of Coal powder spray and combustion product and air-flow, and the splashing of scum, the scorification of flowing molten iron, blast-furnace tuyere is under this very exacting terms, be easy to be damaged, so the length in service life of blast-furnace tuyere will directly affect service cycle and product yield and the economic benefit of blast furnace.
In the present age of new technology, new technology fast development, the technical process that blast furnace ironmaking will be produced as iron and steel and long-term existence.Global iron output was nearly 800,000,000 tons in 2004, wherein 94% produced for the blast furnace technology flow process and to obtain.Pulverized coal injection has become in the blast furnace ironmaking process important means of strengthening, lower consumption, reduce the CO2 discharging at present, and advanced iron and steel enterprise's coal ejection ratio has reached 150kg/t ~ 250kg/t both at home and abroad.Along with the development of blast furnace smelting technology and the further raising of coal injection of draught amount, blast-furnace tuyere has been proposed more and more higher specification requirement, under the current Energy situation condition that severe, energy prices rise steadily gradually, the ironmaking power-saving technology take pulverized coal injection as representative is subjected to people's concern deeply.Yet along with the raising of injecting coal quantity, the coal dust spouting velocity is accelerated, air port wearing and tearing aggravation, and the air port reduces service life.According to the production statistics of certain 10 blast furnace of iron company, the air port of changing because of the coal injection wearing and tearing is 30% ~ 40% of air port total losses amount.Thereby urgent need seeks to prolong the technical method of Service Life of Blast Furnace Tuyere.
Prior art solves the main methods such as the high nichrome of build-up wear-resistant or ceramic embedded lining that rely on of tuyere case wearing and tearing at present, but the shortcoming that these technique ubiquity wearing layers and substrate combinating strength are low, and overlay cladding and ceramic layer thermal conductivity are bad, the wearing layer and the matrix line coefficient of expansion that form differ greatly, easily the generation wearing layer chaps and peels off in use in the air port, result of use is undesirable, and Service life is limited.This shows, further develop the new surface treatment process in air port, is present blast-furnace tuyere problem in the urgent need to address to improve wearing layer and substrate combinating strength.
Summary of the invention
The object of the present invention is to provide a kind of high-temperature and wear-proof that is adapted to the blast-furnace tuyere liner and preparation method thereof, have good heat conductivility, elevated temperature strength and wear resistance at elevated temperature, and can realize metallurgical binding with the fine copper matrix, the tuyere cover of blast furnace liner high-temperature and wear-proof of long service life is to improve anti-wear performance and the service life of tuyere cover of blast furnace.
For this reason, the present invention mainly is a kind of high-temperature and wear-proof that at high temperature can overcome the impact of thermal stress of invention, and it is to be made by the raw material of following weight proportioning:
Copper nanoparticle: 40 ~ 60% nano-tungsten powders: 36 ~ 56%
Iron powder: 0.2 ~ 0.6% chromium powder: 4 ~ 6%
Wherein, the particle diameter of copper nanoparticle and nano-tungsten powder is less than 500nm, and the particle diameter of iron powder and chromium powder is less than 100 μ m.
The preparation technology of the high-temperature and wear-proof that described this tuyere cover of blast furnace liner is used is as follows:
(1) producing of nano metal powder: the ratio of determining ammonium paratungstate and copper sulphate raw material according to the content of tungsten and copper; The mixed solution of preparation ammonium paratungstate and copper sulphate; Adopt spray drying process, obtain the presoma of slaine mixed-powder by rotary-atomizing and drying process thereafter; Presoma is obtained W-Cu oxide composite end at 300 ~ 450 ℃ of calcining 60 ~ 90min; Then adopt hydrogen to reduce at 600 ~ 800 ℃ and obtain W-Cu nanocomposite powder.
(2) preparation of fine/nano tungsten-copper high-temperature and wear-proof: add in proportion iron powder and chromium powder at the nano-scale W-Cu composite powder end, carry out ball milling after 2 ~ 4 hours even mixing, inserting in the vacuum hotpressing stove in temperature is that 900 ~ 1000 ℃, pressure are sintering 100 ~ 200min under 250 ~ 300KN condition, by high temperature, high pressure, reach the timeliness effect under high temperature, the high pressure, make metal plastic deformation, fusing and diffusion, thereby obtain the anti-high-abrasive material of tungsten copper high temperature.
Main feature of the present invention is the nanoscale high-abrasive material with after copper nanoparticle evenly mixes, insert in the equipment that high temperature, high pressure can be provided, by high temperature, high pressure, reach the timeliness effect under high temperature, the high pressure, make metal plastic deformation, fusing and diffusion, thereby obtain the nanometer antiwear carbon/carbon-copper composite material.The mechanism of producing of high-abrasive material has merged Pressure Welding, melting and three kinds of machines of diffusion welding (DW) and has buried. simultaneously because the timeliness effect of HTHP is demonstrated fully diffusion, solid solution, and the alloying of realization material.Making the nano-scale particle of high-abrasive material and fine copper be combined into small complex is evenly distributed in the copper base material.Even so also can not be large to above the combined strength bination between high-abrasive material and the copper in the thermal stress that produces in the situation of range of temperature comparison, fundamentally eliminate thermal stress to impact and the destruction of material.
The main performance index of the high-abrasive material of the present invention's preparation is as follows:
Hardness (HRB)〉100;
Thermal conductivity (w/ (m.k))〉190;
Thermal coefficient of expansion (10
-6/ ℃) 6.2;
High temperature (800 ℃) intensity: tensile strength 〉=300MPa; Fracture toughness 〉=150MPa.
Description of drawings
Fig. 1 is the sintering process of fine/nano tungsten-copper high-abrasive material, among the figure one of curve expression sintering temperature over time, another be sintering pressure over time.
The specific embodiment
Adopting order of ammoniumparatungstate crystal and copper sulfate crystal is raw material, ammonium metatungstate and copper sulphate are configured to colloidal sol, wherein W, Cu element ratio are 60: 40 in the solution, again colloidal sol spray body dry (atomising head rotating speed 30000r/min, 250 ℃ of temperature) are made the W-Cu precursor powder.Presoma is obtained W-Cu oxide composite end at 400 ℃ of calcining 90min, then adopt hydrogen to reduce at 780 ℃ and obtain W-Cu nanocomposite powder.Then add in proportion iron powder 0.3wt% and chromium powder 5.0wt% at the nano-scale W-Cu composite powder end, carry out ball milling after 3 hours even mixing, insert in the vacuum hotpressing stove, sintering process as shown in Figure 1, by high temperature, high pressure, reach the timeliness effect under high temperature, the high pressure, make metal plastic deformation, fusing and diffusion, thereby obtain the anti-high-abrasive material of tungsten copper high temperature.
The main performance of the high-abrasive material of preparation is as follows:
Hardness (HRB) 102;
Thermal conductivity (w/ (m.k)) 210;
Thermal coefficient of expansion (10
-6/ ℃) 6.9;
High temperature (800 ℃) intensity: tensile strength 320MPa; Fracture toughness 158MPa.
Claims (2)
1. high-temperature and wear-proof that is adapted to the blast-furnace tuyere liner is characterized in that being made by the raw material of following weight proportioning:
Copper nanoparticle: 40 ~ 60% nano-tungsten powders: 35 ~ 55%
Iron powder: 0.2 ~ 0.6% chromium powder: 4 ~ 6%
Wherein, the particle diameter of copper nanoparticle and nano-tungsten powder is less than 500nm, and the particle diameter of iron powder and chromium powder is less than 100 μ m.
2. a kind of preparation method who is adapted to the high-temperature and wear-proof of blast-furnace tuyere liner claimed in claim 1 is characterized in that its preparation technology is as follows:
(1) producing of nano metal powder: the ratio of determining ammonium paratungstate and copper sulphate raw material according to the content of tungsten and copper; The mixed solution of preparation ammonium paratungstate and copper sulphate; Adopt spray drying process, obtain the presoma of slaine mixed-powder by rotary-atomizing and drying process thereafter; Presoma is obtained W-Cu oxide composite end at 300 ~ 450 ℃ of calcining 60 ~ 90min; Then adopt hydrogen to reduce at 600 ~ 800 ℃ and obtain W-Cu nanocomposite powder;
(2) preparation of fine/nano tungsten-copper high-temperature and wear-proof: add in proportion iron powder and chromium powder at the nano-scale W-Cu composite powder end, carried out ball milling 2 ~ 4 hours, after it is evenly mixed, inserting in the vacuum hotpressing stove in temperature is that 900 ~ 1000 ℃, pressure are sintering 200 ~ 260min under 250 ~ 300KN condition, by high temperature, high pressure, reach the timeliness effect under high temperature, the high pressure, make metal plastic deformation, fusing and diffusion, thereby obtain the anti-high-abrasive material of tungsten copper high temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103345724A CN102847933A (en) | 2012-09-12 | 2012-09-12 | High-temperature wear-resistant material adapted to lining of blast-furnace tuyere and preparation method of high-temperature wear-resistant material |
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| CN2012103345724A CN102847933A (en) | 2012-09-12 | 2012-09-12 | High-temperature wear-resistant material adapted to lining of blast-furnace tuyere and preparation method of high-temperature wear-resistant material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9970101B2 (en) | 2014-02-18 | 2018-05-15 | Corning Incorporated | Metal-free CVD coating of graphene on glass and other dielectric substrates |
| CN110343888A (en) * | 2019-07-31 | 2019-10-18 | 河南科技大学 | A kind of preparation method of the low tungsten Cu-W composite material of high-copper- |
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|---|---|---|---|---|
| JPH04246113A (en) * | 1991-01-30 | 1992-09-02 | Tobata Seisakusho:Kk | Tuyere in blast furnace |
| CN1393310A (en) * | 2001-06-22 | 2003-01-29 | 中国科学院金属研究所 | Process for preparing nano-class composite W-Cu powder |
| CN1600883A (en) * | 2003-09-25 | 2005-03-30 | 中国科学院金属研究所 | Tungsten-copper alloy piece in superfine crystal and preparation |
| CN1948528A (en) * | 2006-11-03 | 2007-04-18 | 北京科技大学 | Preparation method of near fully densificated high W or Mo content W-Cu or Mo-Cu composite material |
| CN1974847A (en) * | 2006-12-14 | 2007-06-06 | 天津理工大学 | Surface reinforcing method for tuyere of blast furnace |
| CN1995438A (en) * | 2006-12-22 | 2007-07-11 | 株洲硬质合金集团有限公司 | Method for preparing elconite |
| KR100933563B1 (en) * | 2009-05-01 | 2009-12-23 | (주)지아이엘 | Preparation method of w-cu composite powder and use thereof |
| CN101875134A (en) * | 2009-12-23 | 2010-11-03 | 云泰硬质合金(赣州)有限公司 | Method for preparing nano tungsten-copper-rare earth composite powder |
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2012
- 2012-09-12 CN CN2012103345724A patent/CN102847933A/en active Pending
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| JPH04246113A (en) * | 1991-01-30 | 1992-09-02 | Tobata Seisakusho:Kk | Tuyere in blast furnace |
| CN1393310A (en) * | 2001-06-22 | 2003-01-29 | 中国科学院金属研究所 | Process for preparing nano-class composite W-Cu powder |
| CN1600883A (en) * | 2003-09-25 | 2005-03-30 | 中国科学院金属研究所 | Tungsten-copper alloy piece in superfine crystal and preparation |
| CN1948528A (en) * | 2006-11-03 | 2007-04-18 | 北京科技大学 | Preparation method of near fully densificated high W or Mo content W-Cu or Mo-Cu composite material |
| CN1974847A (en) * | 2006-12-14 | 2007-06-06 | 天津理工大学 | Surface reinforcing method for tuyere of blast furnace |
| CN1995438A (en) * | 2006-12-22 | 2007-07-11 | 株洲硬质合金集团有限公司 | Method for preparing elconite |
| KR100933563B1 (en) * | 2009-05-01 | 2009-12-23 | (주)지아이엘 | Preparation method of w-cu composite powder and use thereof |
| CN101875134A (en) * | 2009-12-23 | 2010-11-03 | 云泰硬质合金(赣州)有限公司 | Method for preparing nano tungsten-copper-rare earth composite powder |
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| 陈伟等: "中国高温用钨铜复合材料的研究现状", 《稀有金属材料与工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9970101B2 (en) | 2014-02-18 | 2018-05-15 | Corning Incorporated | Metal-free CVD coating of graphene on glass and other dielectric substrates |
| CN110343888A (en) * | 2019-07-31 | 2019-10-18 | 河南科技大学 | A kind of preparation method of the low tungsten Cu-W composite material of high-copper- |
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Application publication date: 20130102 |