CN104741588B - The manufacture method of ICDP roll working lining - Google Patents
The manufacture method of ICDP roll working lining Download PDFInfo
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- CN104741588B CN104741588B CN201510079006.7A CN201510079006A CN104741588B CN 104741588 B CN104741588 B CN 104741588B CN 201510079006 A CN201510079006 A CN 201510079006A CN 104741588 B CN104741588 B CN 104741588B
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- icdp
- roll
- furnace charge
- ferrum liquid
- working lining
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Abstract
The present invention discloses the manufacture method of a kind of ICDP roll working lining, during being applied to roll casting.Including fritting process, high melt, ingot casting and four steps of cast roll working lining.The inventive method will have the genetic common furnace charge of furnace charge be changed into by process do not have the genetic high-purity of furnace charge clean furnace charge, roll can be prevented effectively from and crack, extend the service life of roll product.Processed by furnace charge fritting, the harmful element in furnace charge, field trash, gas content are all down to reduced levels (S≤0.01%, Si≤0.5%, P≤0.03%, [O]≤50ppm), can obviously improve foundry goods mechanical performance, play crystal grain thinning, improve the effect organized.Use fritting process after cleaning furnace charge produce ICDP roll working lining structure property be improved significantly, structure refinement, dendrite length shorten (≤500 μm), carbide content higher (>=36%), matrix microhardness (>=536Hm) is bigger, and wearability strengthens.
Description
Technical field
The present invention relates to Metallurgical Machinery Roller casting field, the system of a kind of roll working lining ICDP roll
Make method.
Background technology
The manufacture process of ICDP roll is, first pours into a mould to obtain roll working lining by the method for centrifugal casting, then with filling out
Core of the roll poured into a mould by core funnel.ICDP roll working lining produce in use more conversion pig, process iron filings,
The iron and steel raw materials such as foundry returns (furnace charge of smelting furnace remelting sent back to by the old metal such as roll, chute ferrum that gives up) are as furnace charge.
There is furnace charge heritability because of respective separate sources in these raw materials, these heritabilitys if not in fusion process in addition
Eliminate, roll casting tissue will be had a negative impact, affect product quality, time serious, occur crackle to lead
Cause waste product produces.In conventional metallurgical casts the production of especially ICDP roll, owing to the overwhelming majority uses sensing
Stove melting, is limited with device characteristics by furnace lining material, it is impossible to carry out furnace refining.Can only be by buying Gao Pin
The cleaning furnace charge of matter as raw material, or ferrum liquid is carried out high melt, insulation standing reach eliminate material lose
Transmissibility and the purpose of raising molten metal clean level.Buy relatively cleaning furnace charge and can cause the purchasing of raw materials as raw material
Cost is significantly increased, and high melt, the insulation measure such as standing are unsatisfactory to improving ferrum liquid purity level effect.
Summary of the invention
The present invention is to provide the manufacture method of a kind of ICDP roll working lining, eliminate furnace charge heritability, reduce former
Material inclusion content, thus improve the product quality of roll.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: comprise the following steps:
1. fritting processes: the pig iron, iron filings, foundry returns are joined according to ICDP roll components of working layer ratio
Put, put in induction furnace and melt；Go out after load melting to the process ladle being loaded with desiliconization agent,
Process ladle feeding injecting station is carried out desulfurization, desiliconization, dephosphorization, ar blowing refining process, obtains cleaning furnace charge
Ferrum liquid；
2. high melt: carry out high melt, high melt temperature in cleaning furnace charge ferrum liquid is refunded induction furnace
1550 ± 5 DEG C, it is incubated 30-60 minute；
3. ingot casting: the ferrum liquid after high melt is gone out to ferrum liquid bag, is poured into ingot mold, makes cleaning
Furnace charge ingot casting；Sand removal after ingot casting die sinking, polishing are totally；
4. cast roll working lining: add ingot casting in induction furnace and carry out melting, ferrum liquid is carried out trimming
Whole, make the constituent content in ferrum liquid reach the requirement of ICDP roll components of working layer, then carry out Si-Fe pregnant
Educate process；Iron liquid casting after breeding enters in the centrifuge of high speed rotating, i.e. prepares ICDP roll after cooling
Working lining.
Further improvement of the present invention is: step 1. described in the fusion temperature of furnace charge be 1450 ± 5 DEG C.
Further improvement of the present invention is: described step 1. in, the addition of desiliconization agent for process ferrum liquid measure
3%.
Further improvement of the present invention is: described step 1. in, desulfurization, desiliconization, dephosphorization, ar blowing refining
Process detailed process be: spray gun is deep into inside ferrum liquid, use nitrogen spray in ferrum liquid Inactivate granular magnesium,
Remove the sulfur in ferrum liquid, silicon, phosphorus；After Inactivate granular magnesium has sprayed, the nitrogen in spray gun is adjusted to argon,
The oxygen in ferrum liquid is removed by spraying into argon；Argon mentions spray gun after having sprayed, and process ladle is hung out injecting station,
Winch to the place of skimming all clawed by the slag on ferrum liquid.
Further improvement of the present invention is: the straying quatity of described Inactivate granular magnesium is 1Kg/ ton ferrum liquid, nitrogen pressure
Power is 0.25MPa, and argon pressure is 0.2MPa.
Further improvement of the present invention is: in the constituent content of the cleaning furnace charge ferrum liquid that 1. described step obtains,
S≤0.01%, Si≤0.5%, P≤0.03%, [O]≤50ppm.
Further improvement of the present invention is: step ingot casting 3. is square block.
Further improvement of the present invention is: described induction furnace is intermediate frequency furnace.
Owing to have employed technique scheme, the technological progress acquired by the present invention is:
The inventive method will be had the genetic common furnace charge of furnace charge and is changed into by process and do not have furnace charge heritability
High-purity cleaning furnace charge, further use cleaning furnace charge pour into a mould to obtain ICDP roll working lining, can effectively keep away
Exempt from roll to crack, extend the service life of roll product.
The present invention is processed by furnace charge fritting, the harmful element in furnace charge, field trash, gas content is all dropped
To reduced levels (S≤0.01%, Si≤0.5%, P≤0.03%, [O]≤50ppm), eliminate furnace charge heredity
Property；Furnace charge after fritting being processed pours into roll, can obviously improve foundry goods mechanical performance, plays refinement crystalline substance
Grain, the effect of improvement tissue.The ICDP roll working lining tissue that cleaning furnace charge after using fritting to process produces
Performance be improved significantly, structure refinement, dendrite length shorten (≤500 μm), carbide content higher (>=
36%), matrix microhardness (>=536Hm) is bigger, and wearability strengthens.
When ICDP roll working lining originally produces, ingot casting carries out melting, so in big volume intermediate frequency furnace
After again roll product is poured into a mould one by one, needed for ICDP roll working lining list props up product, ferrum liquid measure is less, institute
Take time longer.In casting process of the present invention, cleaning furnace charge ferrum liquid is cast as square ingot casting, it is simple to deposit
Put and use.During cast roll working lining, select the ingot casting of suitable amount, melt in little volume intermediate frequency furnace
Refine, multiple little volume intermediate frequency furnace can be used simultaneously to carry out melting, be greatly accelerated speed of melting,
Single production used time reduces by 23%, the composition adjustment being effectively shortened in former big volume intermediate frequency furnace and watering
The time of note roll working lining, improve production efficiency, reduce production cost.
The present invention has good market prospect and promotional value.The present invention uses cleaning furnace charge in cast step
In time, be finely adjusted whole to ferrum liquid composition, and the ICDP roll defect rate of production production model relatively in early days reduces by 48%,
Simultaneously structure property be improved significantly, there is good market prospect.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further details:
Embodiment 1
The manufacture method of ICDP roll working lining, comprises the following steps:
1. fritting processes: by the pig iron, iron filings, foundry returns according to ICDP roll components of working layer ratio, steel-making
The pig iron 20%, iron filings+foundry returns 65% configures, and puts into 30t intermediate frequency furnace and melts；Furnace charge melts
Change to ferrum liquid 1445 DEG C and come out of the stove to processing in ladle, add in ladle in advance and account for fritting process ferrum liquid measure 3%
Desiliconization agent (Anyang Hua Tai furnace refractory company limited), desiliconization agent has desiliconization, dephosphorization double effects.Ferrum
After liquid goes out to ladle, silicon, P elements in ferrum liquid can tentatively react with desiliconizing and dephosphorizing；Spray gun is deep
Entering in ferrum liquid, use 0.25MPa nitrogen to spray into Inactivate granular magnesium, Inactivate granular magnesium straying quatity is 1Kg/ ton ferrum liquid,
Inactivate granular magnesium and the element sulphur in ferrum liquid react formation slag, reach desulfurized effect；Strongly stirring at nitrogen simultaneously
Mixing under effect, desiliconization agent fully carries out reaction with the silicon in ferrum liquid, P elements and forms slag, reaches desiliconization, takes off
Phosphorus effect；After Inactivate granular magnesium has sprayed, the nitrogen in spray gun being adjusted to argon, spraying into pressure is 0.2MPa,
Shi Changwei 5 minutes, reduces the oxygen content in ferrum liquid；When in ferrum liquid, sulfur, phosphorus, oxygen are reduced to process components and want
After asking (S≤0.01%, Si≤0.5%, P≤0.03%, [O]≤50ppm), process ladle is hung out injecting station,
Winch to the place of skimming all clawed by the slag on ferrum liquid, obtain cleaning furnace charge ferrum liquid；
2. high melt: cleaning furnace charge ferrum liquid overturning is returned in 30t intermediate frequency furnace, carries out high melt,
Smelting temperature is 1545 DEG C, is incubated 30 minutes, reduces trace harmful elements further, eliminates furnace charge heritability；
3. ingot casting: the ferrum liquid after high melt is gone out to ferrum liquid bag, then be poured into ingot mold and make cleaning
Furnace charge ingot casting, makes square block, it is simple to deposit；After sand removal after ingot casting die sinking, polishing are clean the most standby；
4. cast roll working lining: 3 tons, 5 tons of intermediate frequency furnaces add this kind of cleaning furnace charge ingot casting carry out
Melting, ferrum liquid composition is finely adjusted whole by the alloy adding 15%, reaches ICDP roll components of working layer requirement
By Si-Fe inoculation, the iron liquid casting after breeding enters to high-speed rotary on the centrifuge of high speed rotating
The roller core turned is poured into a mould in the ferrum liquid after breeding, and is formed and i.e. prepare ICDP roll working lining after cooling.
Embodiment 2
The manufacture method of ICDP roll working lining, comprises the following steps:
1. fritting processes: by the pig iron, iron filings, foundry returns according to ICDP roll components of working layer ratio, steel-making
The pig iron 20%, iron filings+foundry returns 65% configures, and enters stove and melts；Load melting to ferrum liquid 1450 DEG C
After come out of the stove to processing in ladle, add in ladle in advance and account for fritting and process desiliconization agent (Anyang of ferrum liquid measure 3%
Hua Tai furnace refractory company limited), desiliconization agent has desiliconization, dephosphorization double effects.After ferrum liquid goes out to ladle
Silicon, P elements in ferrum liquid can tentatively react with desiliconizing and dephosphorizing；Spray gun is deep in ferrum liquid, uses
0.25MPa nitrogen sprays into Inactivate granular magnesium, and Inactivate granular magnesium straying quatity is 1Kg/ ton ferrum liquid, Inactivate granular magnesium and ferrum liquid
In element sulphur reaction formed slag, reach desulfurized effect；Simultaneously under the strong agitation effect of nitrogen, desiliconization
Agent fully carries out reaction formation slag with the silicon in ferrum liquid, P elements, reaches desiliconization, dephosphorization effect；Work as passivation
After magnesium grain has sprayed, the nitrogen in spray gun being adjusted to argon, spraying into pressure is 0.2MPa, time a length of 5 minutes,
Reduce the oxygen content in ferrum liquid；When in ferrum liquid, sulfur, phosphorus, oxygen are reduced to process components requirement (S≤0.01%, Si
≤ 0.5%, P≤0.03%, [O]≤50ppm) after, process ladle is hung out injecting station, winches to skim place by ferrum
Slag on liquid all claws, and obtains cleaning furnace charge.
2. high melt: in cleaning furnace charge ferrum liquid overturning is melted down, lift temperature to 1555 DEG C, be incubated 60 minutes,
Reduce trace harmful elements further, eliminate furnace charge heritability；
3. ingot casting: the ferrum liquid after high melt is gone out to ferrum liquid bag, then pour into a mould ingot mold and make cleaning stove
Material ingot casting, makes square block, it is simple to deposit；After sand removal after ingot casting die sinking, polishing are clean the most standby；
4. cast roll working lining: 3 tons, 5 tons of intermediate frequency furnaces add this kind of cleaning furnace charge ingot casting carry out
Melting, ferrum liquid composition is finely adjusted whole by the alloy adding 15%, reaches ICDP roll components of working layer requirement
By Si-Fe inoculation, the iron liquid casting after breeding enters to high-speed rotary on the centrifuge of high speed rotating
The roller core turned is poured into a mould in the ferrum liquid after breeding, and is formed and i.e. prepare ICDP roll working lining after cooling.
Embodiment 3
The manufacture method of ICDP roll working lining, comprises the following steps:
1. fritting processes: by the pig iron, iron filings, foundry returns according to ICDP roll components of working layer ratio, steel-making
The pig iron 20%, iron filings+foundry returns 65% is prepared, and enters stove and melts；Load melting to ferrum liquid 1450 DEG C
After come out of the stove to processing in ladle, add in ladle in advance and account for fritting and process desiliconization agent (Anyang of ferrum liquid measure 3%
Hua Tai furnace refractory company limited), desiliconization agent has desiliconization, dephosphorization double effects.After ferrum liquid goes out to ladle
Silicon, P elements in ferrum liquid can tentatively react with desiliconizing and dephosphorizing；Spray gun is deep in ferrum liquid, uses
0.25MPa nitrogen sprays into Inactivate granular magnesium, and Inactivate granular magnesium straying quatity is 1Kg/ ton ferrum liquid, Inactivate granular magnesium and ferrum liquid
In element sulphur reaction formed slag, reach desulfurized effect；Simultaneously under the strong agitation effect of nitrogen, desiliconization
Agent fully carries out reaction formation slag with the silicon in ferrum liquid, P elements, reaches desiliconization, dephosphorization effect；Work as passivation
After magnesium grain has sprayed, the nitrogen in spray gun being adjusted to argon, spraying into pressure is 0.2MPa, time a length of 5 minutes,
Reduce the oxygen content in ferrum liquid；When in ferrum liquid, sulfur, phosphorus, oxygen are reduced to process components requirement (S≤0.01%, Si
≤ 0.5%, P≤0.03%, [O]≤50ppm) after, process ladle is hung out injecting station, winches to skim place by ferrum
Slag on liquid all claws, and obtains cleaning furnace charge.
2. high melt: refund in intermediate frequency furnace by cleaning furnace charge ferrum liquid, lift temperature to 1550 DEG C, is incubated 60
Minute, reduce trace harmful elements further, eliminate furnace charge heritability；
3. ingot casting: the ferrum liquid after high melt is gone out to ferrum liquid bag, then pour into a mould ingot mold and make cleaning stove
Square block made by material ingot casting, it is simple to deposit；After sand removal after ingot casting die sinking, polishing are clean the most standby；
4. cast roll working lining: 3 tons, 5 tons of intermediate frequency furnaces add this kind of cleaning furnace charge ingot casting carry out
Melting, ferrum liquid composition is finely adjusted whole by the alloy adding 15%, reaches ICDP roll components of working layer requirement
By Si-Fe inoculation, the iron liquid casting after breeding enters to high-speed rotary on the centrifuge of high speed rotating
The roller core turned is poured into a mould in the ferrum liquid after breeding, and is formed and i.e. prepare ICDP roll working lining after cooling.
Detect respectively at 5mm, 10mm and the 15mm of the roll working lining of embodiment 1-3, and and general
Logical furnace charge institute Casting Roller working lining carries out detecting Data Comparison, the results are shown in Table 1.
Table 1 embodiment institute's Casting Roller working lining and common furnace charge institute Casting Roller working lining testing result
Can be drawn by table 1, use the ICDP roll working lining cleaning furnace charge production after fritting process and make
Compare with the roll working lining manufactured by common furnace charge, structure property be improved significantly, structure refinement, branch
Brilliant length shortens (≤500 μm), carbide content higher (>=36%), matrix microhardness (>=536Hm)
Bigger, wearability strengthens.
Claims (7)
- The manufacture method of 1.ICDP roll working lining, it is characterised in that comprise the following steps:1. fritting processes: the pig iron, iron filings, foundry returns are joined according to ICDP roll components of working layer ratio Put, put in induction furnace and melt；Go out after load melting to the process ladle being loaded with desiliconization agent, Process ladle feeding injecting station is carried out desulfurization, desiliconization, dephosphorization, ar blowing refining process, obtains cleaning furnace charge Ferrum liquid；The detailed process that desulfurization, desiliconization, dephosphorization, ar blowing refining process is: be deep into by spray gun in ferrum liquid Portion, uses nitrogen to spray into Inactivate granular magnesium, the sulfur removed in ferrum liquid, silicon, phosphorus in ferrum liquid；Work as Inactivate granular magnesium After having sprayed, the nitrogen in spray gun is adjusted to argon, removes the oxygen in ferrum liquid by spraying into argon；Argon sprays Mention spray gun after complete, process ladle is hung out injecting station, winch to the place of skimming and the slag on ferrum liquid is all clawed；2. high melt: carry out high melt, high melt temperature in cleaning furnace charge ferrum liquid is refunded induction furnace 1550 ± 5 DEG C, it is incubated 30-60 minute；3. ingot casting: the ferrum liquid after high melt is gone out to ferrum liquid bag, is poured into ingot mold, makes cleaning Furnace charge ingot casting；Sand removal after ingot casting die sinking, polishing are totally；4. cast roll working lining: add ingot casting in induction furnace and carry out melting, ferrum liquid is carried out trimming Whole, make the constituent content in ferrum liquid reach the requirement of ICDP roll components of working layer, then carry out Si-Fe pregnant Educate process；Iron liquid casting after breeding enters in the centrifuge of high speed rotating, i.e. prepares ICDP roll after cooling Working lining.
- The manufacture method of ICDP roll working lining the most according to claim 1, it is characterised in that: step The fusion temperature of the furnace charge described in the most 1. is 1450 ± 5 DEG C.
- The manufacture method of ICDP roll working lining the most according to claim 1, it is characterised in that: institute State step 1. in, the addition of desiliconization agent be process ferrum liquid measure 3%.
- The manufacture method of ICDP roll working lining the most according to claim 1, it is characterised in that: institute The straying quatity stating Inactivate granular magnesium is 1Kg/ ton ferrum liquid, and nitrogen pressure is 0.25MPa, and argon pressure is 0.2MPa.
- The manufacture method of ICDP roll working lining the most according to claim 1, it is characterised in that: institute State in the constituent content of the cleaning furnace charge ferrum liquid that 1. step obtains, S≤0.01%, Si≤0.5%, P≤0.03%, [O]≤50ppm。
- The manufacture method of ICDP roll working lining the most according to claim 1, it is characterised in that: step Rapid ingot casting 3. is square block.
- The manufacture method of ICDP roll working lining the most according to claim 1, it is characterised in that: institute Stating induction furnace is intermediate frequency furnace.
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