CN1127799A - Surface melt diffusion treatment method of alloy at tuyere of iron-smelting blast furnace - Google Patents
Surface melt diffusion treatment method of alloy at tuyere of iron-smelting blast furnace Download PDFInfo
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- CN1127799A CN1127799A CN 95112049 CN95112049A CN1127799A CN 1127799 A CN1127799 A CN 1127799A CN 95112049 CN95112049 CN 95112049 CN 95112049 A CN95112049 A CN 95112049A CN 1127799 A CN1127799 A CN 1127799A
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Abstract
The thermal treating method for fusion diffusion of alloy into surface of tuyere of blast furnace features that activator, fusion accelerator, compound metal diffusing agent and protector are used for said fusion diffusion of alloy at a particular temp for a certain time. Its hardness is HRA 6.5 and diffusion depth is up to 3.5 mm.
Description
The invention belongs to the metallic surface heat treating method.Particularly a kind of blast furnace copper surface melt diffusion treatment method of alloy at tuyere is applicable to the thermal treatment on surface, air port.
Blast-furnace tuyere is iron-smelting blast furnace rapid wear crux parts, in stove, to bear the high temperature oxidation about 2000 ℃, the high temperature corrode, the corrosion of obnoxious flavour, because the coke powder of the high speed rotary that winding-up brings and the wearing and tearing of iron powder, promptly need blowing out to change once burn out, directly influence the ironmaking output and the economic benefit of blast furnace.So prolong the work-ing life in air port, be the problem that iron industry is paid close attention to very much.The present method that adopts, improve air port material purity and air port internal water channel structure, working face built-up welding high-meltiing alloy is heated in the air port, spraying refractory metal oxide compound, polynary elemental metals oozes the air port altogether, method cuts both ways in sum, if improve material purity and change air port internal water channel structure, production cost is higher, needs to increase water circulating apparatus, if adopt the built-up welding air port, because the welding pool temperature is very high, and the tuyere body heat-transfer rate is very fast, causes internal stress direction complexity owing to cold and hot contraction is asynchronous, produces micro hole or be full of cracks.If adopt multi-element metal to ooze the air port altogether, though can improve work-ing life, work in-process needs the inert gas protection, and infiltration elemental metals element is limited, and use properties is also limited, alloying layer thickness hardness instability, and toughness and high temperature oxidation resistance are not good.
The object of the present invention is to provide that a kind of to have a life-span long, stability is good, the surface melt diffusion treatment method of alloy at tuyere of iron-smelting blast furnace that mechanical property is high.
Purpose of the present invention realizes by following mechanism: blast-furnace tuyere surface infiltration alloy treatment process, its mechanism is to adopt heavily chlorination complexing composition metal element, under the effect of separating is boiled in catalysis, carry out chemical reaction, utilize microwave principle to make the various metal reagents of participating in reaction, produce high-speed friction between molecule and the molecule, give birth to thermo-cracking, condensation forms novel substance, infiltration accelerating agent and composition metal penetration enhancer are under the bioactive molecule effect, the infiltration medium is moved to crystallizer surface in an orderly manner, in specific temperature and time, form the infiltration alloy layer, has resistance to high temperature oxidation, the high temperature resistance wearing and tearing, corrosion-resistant, the fused characteristic.
Purpose of the present invention is achieved by the following scheme: blast-furnace tuyere surface infiltration alloy treatment process, its essence is the employing activator, and melting promotor, the composition metal penetration enhancer, protective material reaches the purpose of alloy infiltration at specified temp and in the time.Treatment process of the present invention is: 1, and at first will give and handle the air port when heating to 300～350 ℃, take out and ooze position brushing activator at need, the water flushing is to neutral, brushing activates auxiliary again, and the water flushing is to neutral again, and this moment, the air port need keep 30 ℃～50 ℃ surplus temperature.2, at needs infiltration position brushing infiltration accelerating agent, do not need infiltration position brushing protective material.After treating seasoning, place and ooze case, ooze the case shop and put the thick composition metal penetration enhancer of 30mm, ooze workpiece surface filling 20mm composition metal penetration enhancer, do not needing infiltration part filling solid protective material to need.3, will ooze case and send in the process furnace, and in 500～950 ℃ of ladder temperature ranges, handle through 18～24 hours infiltration of timeliness, tapping temperature is cleared up the air port surface attachments when the time comes at 300 ℃～250 ℃.
One, said activator in the aforesaid method, the nitric acid by 65%, 2% aluminum nitrate, 3% nickelous nitrate, surplus adds water and forms.After the configuration, the water flushing is to neutral while brushing need to ooze the position to the air port in proportion, and purpose is to activate decontamination.The activation auxiliary is by 60% water, 25% ethanol, and 10% hydrochloric acid, 5% iron trichloride liquid mixture prepared need be oozed the position with the air port and be placed mixed solution, brush 3 minutes, and the water flushing is dried the surface, air port to neutrality then.
Two, said infiltration accelerating agent is produced by following method in the aforesaid method: infiltration accelerating agent is by heavy chloride complex, powdered alloy, gummed liquid is formed, wherein, (1) heavy chloride complex is by 42% pure water, 30% hydrochloric acid, 10% chromic trioxide or potassiumchromate or chromium chloride, 6% nickelous chloride, 8% rare earth chloride, 4% Zulkovsky starch is formed, and getting boils after the various materials of aforementioned proportion mix separates 2 hours, adopts the microwave heater condensation to produce heavy chloride complex to the exclusion state then.(2) powdered alloy: by 0.5% rare earth alloy powder, 0.5% chromium powder, 0.5% zirconium powder, 0.5% silver powder, 5% al-ni alloy powder, 8% bronze medal ni mn co alloy powder, 10% tungsten powder, 40% molybdenum powder, surplus is produced for the coating type aluminium powder mixes.(3) gummed liquid: by 5% ammoniacal liquor, 10% polyvinyl alcohol, 85% ethanol, mixing is produced (4) and is got 10% heavy chloride complex, 50% gummed liquid, lapping-in is even, and the back adds 40% powdered alloy, concocts to painting shape, makes infiltration accelerating agent.
Three, according to said protective material in the aforesaid method, by 20% Graphite Powder 99,20% phosphorus sheet powder, 10% norbide and 50% gummed liquid are formed, and above-mentioned substance is mixed blending to painting shape, make protective material.
Four, produced by following method according to said composition metal penetration enhancer in the aforesaid method: (1) composition metal penetration enhancer is by 50% fine aluminium, 15% rare-earth-Al-Mg alloy or rare earth alloy, 13%65 Manganese Silicon Steels, 10% low-carbon steel, 5%1 chromium, 18 nickel, 9 titanium steels, 5%35 Chrominm-molybdenum-vanadium steels, 2% sodium-chlor or Sodium Fluoride are formed, above-mentioned metal alloy cold quenching after melting is handled, be ground to 100～150 purpose powdered alloys after the fragmentation.(2) get above-mentioned powdered alloy 50%, aluminum oxide powder 42%, industrial aluminium powder 3.5%, the aluminium powder 3% of getting angry, ammonia chloride 1.5% is evenly produced the composition metal penetration enhancer through abundant grinding.
Five, be mixed and made into according to the carbon dust of said solid protective material in the aforesaid method by 95% casting model powder and 5%.
Embodiment:
Fig. 1 is a blast-furnace tuyere infiltration alloy treatment temp step curve of the present invention.
Fig. 2 is that the box structure synoptic diagram is oozed in the present invention.
Among Fig. 1: 1, case lid, 2, solid protective material, 3, air port, 4, case core, 5, composition metal penetration enhancer,
Blast-furnace tuyere infiltration alloy treatment process: 1, at first will give the processing air port and heat to 320 ℃, and take out and ooze position brushing activator at need, the water flushing is brushed the activation auxiliary again to neutral then, and the water flushing is to neutral more afterwards, and the maintenance draught temperature is 40 ℃.
2, at need infiltration position brushing infiltration accelerating agent, do not need infiltration position brushing protective material, treating that seasoning is placed on oozes case, ooze case at the bottom of the shop put the thick alloyed metal penetration enhancer of 30mm, wait to ooze workpiece surface filling 20mm composition metal penetration enhancer, as shown in Figure 2.
3, will ooze case and send in the process furnace, in 500～950 ℃ of ladder temperature ranges, timeliness 24 hours, as shown in Figure 1.Tapping temperature is 300 ℃, clears up the workpiece surface attachment when the time comes and thing.
Wherein, said in the aforesaid method:
(1) activator: nitric acid 650 grams, aluminum nitrate 20 grams, nickelous nitrate 30 grams, surplus adds water and forms.
(2) activation auxiliary: by ethanol 250 grams, hydrochloric acid 100 grams, iron trichloride 50 grams, surplus is the water liquid mixture prepared.
(3) infiltration accelerating agent: infiltration accelerating agent is produced by following method: infiltration accelerating agent is made up of heavy chloride complex, powdered alloy, gummed liquid, and wherein, (1) heavy chloride complex is by pure water 420 grams, hydrochloric acid 300 grams, chromic trioxide 100 grams, nickelous chloride 100 grams, rare last 80 grams of chlorination, Zulkovsky starch 40 grams are formed.Boil after each material of aforementioned proportion mixed and separate 2 hours, be condensed to anhydrous state with microwave heater then, produce heavy chloride complex.
(2) powdered alloy: by rare alloy powder 5 grams of going up, chromium powder 5 grams, zirconium powder 5 grams, silver powder 5 grams, al-ni alloy powder 50 grams, copper ni mn co alloy powder 80 grams, tungsten powder 100, molybdenum powder 400 grams, coating type aluminium powder 350 grams, mixing is produced.
(3) gummed liquid: by ammoniacal liquor 50 grams, polyvinyl alcohol 100 grams, ethanol 850 grams, mixing is produced.
(4) get heavy chloride complex 50 grams, gummed liquid 250 grams after lapping-in is even, add 230 gram powdered alloys, and blending makes infiltration accelerating agent to painting shape.
(4) protective material: by Graphite Powder 99 200 grams, phosphorus sheet powder 200 grams, norbide 100 grams, gummed liquid 500 grams mix blending to painting shape, make protective material.
(5) composition metal penetration enhancer: get rare aluminum magnesium alloy 1500 grams of going up of fine aluminium 5300 grams, 65 Manganese Silicon Steels, 1000 grams, low-carbon steel 1000 grams, 1 chromium, 18 nickel, 9 titanium steels, 500 grams, 35 chromium aluminium vanadium steel, 500 grams, sodium-chlor 200 grams, cold quenching after the above-mentioned substance melting is handled crushing grinding to 100 purpose alloy powder.
Get above-mentioned alloy powder 5000 grams, aluminum oxide powder 4200 grams, industrial aluminium powder 350 grams, aluminium powder 300 grams of getting angry, ammonia chloride 150 grams, fully the composition metal penetration enhancer is evenly produced in grinding.
Six, solid protective material; Get casting model powder 9500 grams, carbon dust 50 grams, mixing is produced.
According to surface melt diffusion treatment method of alloy at tuyere new technology of the present invention, can obtain hardness HRA6.5, ooze 3.5 millimeters of Du Keda.
Claims (6)
1, blast-furnace tuyere surface infiltration alloy treatment process is characterized in that:
(1), at first will give and handle the air port when heating to 300～350 ℃, and take out and ooze position brushing activator at need, the water flushing is to neutral, brushing activation auxiliary again, and the water flushing is to neutral again, and this moment, the air port need keep 30 ℃～50 ℃ surplus temperature.
(2), at needs infiltration position brushing melting promotor, do not need infiltration position brushing protective material.After treating seasoning, place and ooze case, ooze case shop and put 30mm composition metal penetration enhancer, ooze the composition metal penetration enhancer of workpiece surface filling 20mm thickness to need,
(3), will ooze case and go in the process furnace, in 500～950 ℃ of ladder temperature ranges, handle through 18～24 hours infiltration of timeliness, tapping temperature is cleared up the air port surface attachments when the time comes at 300 ℃～250 ℃.
2, activator according to claim 1 is characterized in that: activator is by 65% nitric acid, 2% aluminum nitrate, and 3% nickelous nitrate, surplus adds water and forms.Activate attached auxiliary agent and be by 60% water, 25 ethanol, 10% hydrochloric acid, 5% iron trichloride liquid mixture prepared,
3, infiltration accelerating agent according to claim 1 is characterized in that: infiltration accelerating agent is produced by following method; Infiltration accelerating agent is by heavy chloride complex, and powdered alloy glues together liquid and forms, wherein:
(1), heavy chloride complex is by 42% pure water, 30% hydrochloric acid, 10% chromic trioxide or potassiumchromate or chromium chloride, 6% nickelous chloride, 8% rare earth chloride, 4% meltability starch is formed, and gets above-mentioned boiling after mixing than the various materials of side and separates 2 hours, adopts the microwave heater condensation to produce heavy chlorinated mixture to the exclusion state then.
(2), powdered alloy, by 0.5% al-ni alloy powder, 0.5% chromium powder, 0.5% zirconium powder, 0.5% silver powder, 5% al-ni alloy powder, 8% bronze medal ni mn co alloy powder, 10% tungsten powder, 40% molybdenum powder, surplus is produced for the coating type aluminium powder mixes.
(3), gummed liquid: by 5% ammoniacal liquor, 10% polyvinyl alcohol, 85% ethanol, mixing is produced.
(4), get 10% heavy chlorine compound, 50% gummed liquid, lapping-in is even, and the back adds 40% powdered alloy, and blending system paint shape makes infiltration accelerating agent.
4, protective material according to claim 1 is characterized in that this protective material by 20% Graphite Powder 99,20% phosphorus sheet powder, and 10% norbide and 50% gummed liquid are formed, and above-mentioned substance is mixed blending to painting shape, make protective material.
5,, it is characterized in that this composition metal penetration enhancer produced by following method according to the described composition metal penetration enhancer of claim 1:
(1), the composition metal penetration enhancer is by 50% fine aluminium, 15% rare-earth-Al-Mg alloy or rare earth alloy, 13%65 Manganese Silicon Steels, 10% low-carbon steel, 5%1 chromium, 18 nickel, 9 titanium steels, 5%35 chromium aluminium vanadium steel, 2% sodium chloride or fluoridize are received composition, above-mentioned metal alloy cold quenching after melting is handled, be ground to 100～150 purpose powdered alloys after the fragmentation.
(2), get above-mentioned powdered alloy 50%, aluminum oxide powder 42%, industrial aluminium powder 3.5% aluminium powder 3% of getting angry, ammonia chloride 1.5% is evenly produced the composition metal penetration enhancer through abundant grinding.
6, solid protective material according to claim 1 is mixed and made into by the carbon dust of 95% casting model powder and 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95112049 CN1127799A (en) | 1995-10-11 | 1995-10-11 | Surface melt diffusion treatment method of alloy at tuyere of iron-smelting blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95112049 CN1127799A (en) | 1995-10-11 | 1995-10-11 | Surface melt diffusion treatment method of alloy at tuyere of iron-smelting blast furnace |
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| CN1127799A true CN1127799A (en) | 1996-07-31 |
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| CN 95112049 Pending CN1127799A (en) | 1995-10-11 | 1995-10-11 | Surface melt diffusion treatment method of alloy at tuyere of iron-smelting blast furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492749B (en) * | 2008-01-24 | 2010-09-08 | 宝山钢铁股份有限公司 | Surface coating for tuyeres of blast furnace and method for preparing the same |
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1995
- 1995-10-11 CN CN 95112049 patent/CN1127799A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492749B (en) * | 2008-01-24 | 2010-09-08 | 宝山钢铁股份有限公司 | Surface coating for tuyeres of blast furnace and method for preparing the same |
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