CN102994675A - Chromium zirconium silver copper tubular tuyere - Google Patents
Chromium zirconium silver copper tubular tuyere Download PDFInfo
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- CN102994675A CN102994675A CN201210529847XA CN201210529847A CN102994675A CN 102994675 A CN102994675 A CN 102994675A CN 201210529847X A CN201210529847X A CN 201210529847XA CN 201210529847 A CN201210529847 A CN 201210529847A CN 102994675 A CN102994675 A CN 102994675A
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Abstract
The invention relates to a chromium zirconium silver copper tubular tuyere which comprises a tuyere body and a tuyere cap, and is characterized in that: the tuyere body material comprises the following chemical components by weight: 98.90-98.93% of Cu, 0.910-0.912% of Sn, 0.0038-0.0039% of P, 0.15-0.18% of Cr, and not more than 0.01% of Zr; the tuyere cap material comprises the following chemical components by weight: 99.79-99.80% of Cu, 0.099-0.11% of Sn, 0.092-0.04% of Ag, 0.0076-0.0078% of P. The invention has the advantages that: by using the properties of silver, chromium, and zirconium, proper amounts of alloy components are added into the casting of the copper tuyere; co-cementation technology is combined, which improves the heat resistance and wear resistance of the copper tuyere, prolongs the service life, reduces the damping down frequency of blast furnaces, and increases the utilization coefficient of blast furnaces; in recent years, the general average service life of blast furnace common tuyeres is 215 days; with the invention, alloy elements such as silver, chromium, and zirconium are applied to the tuyere material, and the tuyere service life is increased to 280 days.
Description
Technical field
The present invention relates to a kind of chromium zirconium silver-bearing copper throughflow tuyere, belong to metallurgy industry blast-furnace tuyere technical field.
Background technology
The air port is one of necessary most important instrument of metallurgy industry blast furnace, and existing blast-furnace tuyere is formed by the fine copper casting, and along with blast furnace smelting technology is constantly progressive, index improves constantly, and directly has influence on blast furnace the work-ing life of blast-furnace tuyere and further strengthens.Because contain the harmful elements such as potassium, sodium, fluorine in the blast-furnace smelting iron ore, therefore, the Working environment of blast-furnace tuyere is very abominable, just higher to the qualitative performance requirements in air port.And the pattern of air port breakage mainly contains: melting loss, wearing and tearing and damaged.Melting loss refers to liquid slag iron contact in the cupola well, impacts air port Tong Bi, the heat flow rate per unit area that heat flow rate per unit area can bear greater than the air port, and with its melt burn-out; Wearing and tearing are after certain hour is used in the air port, to be worn and torn by materials such as hot coke; Damaged then be the consequence that air port workmanship or material defective cause, wherein wearing and tearing, breakage are not only relevant with the work fate, and this wearing and tearing are subjected to the restriction of complicated factor in the stove almost irresistible with damaged, and therefore solving melting loss just becomes the striving direction that improves the air port life-span.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of blast-furnace tuyere cracky in abominable Working environment, change the general thought of its material by development, provide a kind of and can improve and improve air port thermal conductivity, intensity, high thermal resistance, wear resistance, oxidation-resistance, thereby improve the chromium zirconium silver-bearing copper throughflow tuyere in the work-ing life of blast-furnace tuyere.
The objective of the invention is to be realized by following mode:
Throughflow tuyere of the present invention is made of air port body and air port cap, it is characterized in that: the weight percent chemical composition of air port body material is: Cu98.90～98.93, Sn0.910～0.912, P0.0038～0.0039, Cr0.15～0.18, Zr≤0.01; The weight percent chemical composition of air port cap material is: Cu99.79～99.80, Sn0.099～0.11, Ag0.092～0.094, P0.0076～0.0078.
In order further to improve the wear resistance on the surface in air port, in the mesopore of air port cap and air port body, adopt and ooze altogether technology, use AI
2O
3Ooze and be coated with material at air port surface endosmosis, the degree of depth of pervious course is 1.8--2mm.
Advantage of the present invention is: utilizes the characteristic of silver, chromium, zirconium, in the casting of copper air port, adds an amount of alloying constituent, and in conjunction with oozing altogether technology, heat-resisting, the wear resisting property in copper air port have been improved, prolong work-ing life, reduced the blast furnace staying number of times, improved the capacity factor of a blast furnace; The comprehensive common air port of blast furnace recent years mean life is 215 days, adopt the present invention to be applied to silver, chromium, zirconium alloy element in the material of air port after, the air port is increased to 280 days work-ing life.
Description of drawings
Fig. 1 is the structural representation in air port.
Among the figure: 1, air port cap, 2, the air port body, 3, pervious course.
Embodiment
Throughflow tuyere of the present invention is made of air port body 2 and air port cap 1, and air port body and function chromium zirconium copper is produced, and the air port cap is produced with silver copper plate.
For helping the understanding of the present invention, we choose three kinds of examples of typical case and are described as follows from cast the different air port specification of each component content:
The casting air port material composition see Table 1(wt%):
Table 1:
The material therefor performance sees Table 2:
Table 2:
As can be seen from the above table, the thermal conductivity of fine silver is far superior to fine copper, and the thermal conductivity of silver-bearing copper also is better than fine copper.On the other hand, chromium zirconium copper has higher intensity and hardness, and electroconductibility and thermal conductivity wear resistance are good.This is that we make the air port cap with silver-bearing copper, makes the theoretical foundation that the air port body is manufactured experimently the air port with chromium zirconium copper.Because the raising of silver-bearing copper thermal conductivity, strengthen air port copper wall and fluid convective heat exchange each other, the air port is subject to heat and is in time taken away by water coolant, make the air port be in the good state of cooling, to bear the high temperature more than 1500 ℃, will inevitably improve accordingly the work-ing life in air port, reduce damping down number of times and time that blast furnace is changed the air port, improve the capacity factor of a blast furnace.Blast-furnace tuyere was increased to 280 days by original 215 days mean life.
The manufacture craft in air port of the present invention is as follows:
1, silver copper plate or chromium zirconium copper will clean, totally, enter the abundant preheating in stokehold;
2, can not use iron ware and instrument in the fusion process, can only stir with crystal vessel and wax rod, instrument enters that the stokehold will be toasted, preheating;
3, fully preheating of reductor and insulating covering agent;
4, silver copper plate or chromium zirconium copper are added respectively the intermediate frequency furnace fusing, melting process covers with the charcoal of having dried, to prevent the oxidation of copper and silver or chromium, zirconium alloy element;
5, after melting, adding the phosphorous of preheating is the phosphor-copper of 0.026 wt %, press constituent content control add-on, and fully stir with wooden stick, with further deep deoxidation and reduce copper water come out of the stove and casting process in oxidation, its objective is the oxidization burning loss that reduces to greatest extent beneficial element silver or chromium, zirconium.Because the existence of silver or chromium, zirconium alloy element in the copper water, therefore need the amount of adding phosphor-copper few, phosphorus is after deoxidation, and the remaining phosphorus content of the finished product is extremely low, can not affect its thermal conductivity;
6, with silver copper plate liquation casting air port cap, with chromium zirconium copper liquation casting air port body, carry out at last machining and thermal treatment.
Ooze altogether in the air port:
Air port cap and air port body mesopore adopt the technology of oozing altogether to improve the wear resistance on surface, air port, are further to improve the air port gordian technique in work-ing life.After carrying out surface treatment until the air port of oozing altogether, seal in the frock clamp of packing into, insert again the AI for preparing
2O
3Ooze and be coated with material (No.52 Inst., Ministry of Chinese Weapons Industry's production), in the resistance furnace of together packing into, temperature is risen to 900 ℃, be incubated 10 hours.Under the condition of high temperature, above alloy powder progressively is penetrated into the following degree of depth 1.8--2mm in surface, air port, forms pervious course, and the hardness of pervious course is higher than the hardness of matrix, so that the air port inwall forms high outside and low outside desirable gradient.Detect through reality, it is about 53 that the air port cap oozes front hardness HB altogether, and oozing altogether rear hardness HB is about 101.This oozes altogether gradient layer (pervious course) and has high-wearing feature, high antioxidant, high antifatigue and high temperature resistance aggressiveness, and these good performances have further improved the work-ing life in air port.
Be applied to respectively through the air port that smelting-casting-machining-thermal treatment obtains in the blast-furnace equipment through practice test and can bear high temperature more than 1500 ℃, three kinds of representative instances choosing are through the actual use of Iron making Plant of Baogang, and its life-span was respectively 279,282,281 days.Satisfy specification of quality fully, improved work-ing life, guaranteed direct motion and the high yield of iron-smelting blast furnace, improved economic benefit.
Claims (2)
1. a chromium zirconium silver-bearing copper throughflow tuyere is made of air port body and air port cap, and it is characterized in that: the weight percent chemical composition of air port body material is: Cu98.90～98.93, Sn0.910～0.912, P0.0038～0.0039, Cr0.15～0.18, Zr≤0.01; The weight percent chemical composition of air port cap material is: Cu99.79～99.80, Sn0.099～0.11, Ag0.092～0.094, P0.0076～0.0078.
2. chromium zirconium silver-bearing copper throughflow tuyere according to claim 1 is characterized in that: adopt in the mesopore of air port cap and air port body and ooze altogether technology, use AI
2O
3Ooze and be coated with material at air port surface endosmosis, the degree of depth of pervious course is 1.8--2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210529847XA CN102994675A (en) | 2012-12-11 | 2012-12-11 | Chromium zirconium silver copper tubular tuyere |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210529847XA CN102994675A (en) | 2012-12-11 | 2012-12-11 | Chromium zirconium silver copper tubular tuyere |
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| CN102994675A true CN102994675A (en) | 2013-03-27 |
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| CN201210529847XA Pending CN102994675A (en) | 2012-12-11 | 2012-12-11 | Chromium zirconium silver copper tubular tuyere |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4572482A (en) * | 1984-11-19 | 1986-02-25 | Corcliff Corporation | Fluid-cooled metallurgical tuyere |
| CN1804072A (en) * | 2004-10-22 | 2006-07-19 | 奥托库姆普铜产品公司 | Method for manufacturing copper alloys |
| CN101717876A (en) * | 2009-12-16 | 2010-06-02 | 北京有色金属研究总院 | Chrome zirconium copper alloy and preparing and processing method thereof |
| CN102108451A (en) * | 2011-02-15 | 2011-06-29 | 常州大学 | Preparation method of copper alloys with high strength and high electric conductivity |
| CN102181594A (en) * | 2011-05-20 | 2011-09-14 | 烟台万隆真空冶金有限公司 | Wear-resisting blast-furnace tuyere small jacket |
-
2012
- 2012-12-11 CN CN201210529847XA patent/CN102994675A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4572482A (en) * | 1984-11-19 | 1986-02-25 | Corcliff Corporation | Fluid-cooled metallurgical tuyere |
| CN1804072A (en) * | 2004-10-22 | 2006-07-19 | 奥托库姆普铜产品公司 | Method for manufacturing copper alloys |
| CN101717876A (en) * | 2009-12-16 | 2010-06-02 | 北京有色金属研究总院 | Chrome zirconium copper alloy and preparing and processing method thereof |
| CN102108451A (en) * | 2011-02-15 | 2011-06-29 | 常州大学 | Preparation method of copper alloys with high strength and high electric conductivity |
| CN102181594A (en) * | 2011-05-20 | 2011-09-14 | 烟台万隆真空冶金有限公司 | Wear-resisting blast-furnace tuyere small jacket |
Non-Patent Citations (1)
| Title |
|---|
| 关国江等: "铬、锆、银铜合金高炉风口的研制分析", 《包钢科技》 * |
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Application publication date: 20130327 |