CN109666855A - Recycle the process of amorphous transformer core refusion and smelting - Google Patents
Recycle the process of amorphous transformer core refusion and smelting Download PDFInfo
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- CN109666855A CN109666855A CN201811509033.3A CN201811509033A CN109666855A CN 109666855 A CN109666855 A CN 109666855A CN 201811509033 A CN201811509033 A CN 201811509033A CN 109666855 A CN109666855 A CN 109666855A
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- 238000003723 Smelting Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 54
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 162
- 238000004064 recycling Methods 0.000 claims abstract description 70
- 239000002994 raw material Substances 0.000 claims abstract description 68
- 238000007664 blowing Methods 0.000 claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 239000002893 slag Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 21
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000004615 ingredient Substances 0.000 claims abstract description 12
- 239000013589 supplement Substances 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000010079 rubber tapping Methods 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 49
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 48
- 229910052742 iron Inorganic materials 0.000 claims description 48
- 229910052796 boron Inorganic materials 0.000 claims description 47
- 239000007789 gas Substances 0.000 claims description 38
- 239000011162 core material Substances 0.000 claims description 25
- 229910052786 argon Inorganic materials 0.000 claims description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000010792 warming Methods 0.000 claims description 11
- 230000003595 spectral effect Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000000289 melt material Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 34
- 230000000694 effects Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000005303 weighing Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 238000006477 desulfuration reaction Methods 0.000 description 9
- 230000023556 desulfurization Effects 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006052 feed supplement Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005464 sample preparation method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- 238000003756 stirring Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/003—Making ferrous alloys making amorphous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of processes for recycling amorphous transformer core refusion and smelting, comprising the following steps: step 1, according to formula FeaSibBcAtomic percent ratio calculating weigh conventional raw material, weigh recycling iron core by certain weight percent；Conventional raw material is added in smelting furnace and heats by step 2, and after molten steel occurs in conventional raw material fusing, recycling iron core, melting materialss are added；Slag former, its ingredient of slag hitting sample detection is added to material melting in step 3；The difference of step 4, surveyed component content and target value calculates the conventional raw material quality for weighing required supplement addition, supplement addition conventional raw material；Step 5 reduces heating power, using the logical protection gas of bottom blowing mode；Step 6, after material is cooled to and opens and pour temperature, slag hitting sampling, tapping.The iron core of the discarded amorphous transformer of recycling can be smelted again removal of impurity height by this method, be easy to be made to meet and made the master alloy with demand, can reach the effect for economizing on resources and reducing production cost.
Description
Technical field
The invention belongs to technical field of smelting, and in particular to the process of recycling amorphous transformer core refusion and smelting.
Background technique
Amorphous distribution transformer refers to the power transformer for using Fe-based amorphous band to prepare as core material, with biography
System silicon steel transformer is compared, and one side Fe-based amorphous alloy magnetic history is relatively easy, so that the sky of transformer be greatly lowered
Load-loss, on the other hand, the simple production process of Fe-based amorphous band compared with traditional silicon steel transformer, production energy consumption is small, therefore
Fe-based amorphous band is referred to as " dual-energy-saving material ".Under normal conditions, the service life of amorphous transformer is 20-30 or so,
Universal North America and Japan exist in recent years and start to discard, re-replace the case where amorphous transformer before about 20 years.
For China, the foreseeable future, for the discarded of amorphous transformer, replacement and the re-using of discarded transformer material
Also it will become the problem of having to face.Discarded amorphous transformer directly abandons destruction, not only results in environmental pollution,
It will cause the wasting of resources.
The technique side that the core material of discarded amorphous transformer is used for the Fe-based amorphous master alloy of refusion and smelting is recycled in research and development
Method can reduce the wasting of resources and reduce iron-based amorphous alloy ribbon material production cost, the quality and service performance of amorphous alloy strips
It is more demanding to the impurity content in its ingredient, needed in smelting process as far as possible reduce molten steel in hydrogen and nitrogen gas body content, sulphur phosphorus
Content, oxide content, nonmetallic and harmful micro impurity element content still introduce in amorphous alloy smelting process
Obsolete material necessarily will increase the impurity level in product as raw material, therefore process optimization improves, and increase smelting process to impurity thing
Removal rate has the Fe-based amorphous master alloy of core material refusion and smelting it is suitable for the discarded amorphous transformer of recycling far-reaching
Meaning.
Summary of the invention
In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide recycling amorphous transformer core remelting
The process of smelting.This method, can be by the iron core smelting again of the discarded amorphous transformer of recycling to removal of impurity height
Refining is easy to that the Fe-based amorphous master alloy with demand that meets amorphous alloy ribbon system is made, can reach and economize on resources and reduce production
The effect of cost.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
It is a kind of recycle amorphous transformer core refusion and smelting process, using raw material include recycling iron core and Fe,
The conventional raw material of Si, B, auxiliary material include slag former, and recycling iron core is the discarded amorphous transformer for removing glue processing after recycling through oil removing
Core material, the process the following steps are included:
Step 1, according to formula FeaSibBcFe-based amorphous alloy atomic percent ratio calculating weigh the normal of Fe, Si, B
Raw material is advised, weighs recycling iron core by certain weight percent, it is spare；
The conventional raw material of Fe, Si, B are added in smelting furnace and heat by step 2, and the conventional raw material to Fe, Si, B melts out
After existing molten steel, recycling iron core is added, adjusts smelting furnace heating power melting materialss；
Slag former is added after material is completely melt in furnace in step 3, then carries out slag hitting, sampling, uses spectral detection
Its ingredient；
Step 4, the Fe of supplement addition needed for being calculated and being weighed according to the difference of surveyed component content and target value,
The conventional raw material quality of Si, B adjust heating power, and the conventional raw material of Fe, Si, B is added；
Step 5 reduces heating power, material is made to cool down, using the logical protection gas of bottom blowing mode in the step process；
Step 6, after material is cooled to and opens and pour temperature, slag hitting is sampled, and tapping is cast for the iron-based non-of required shape
Brilliant master alloy.
Preferably, the weight percent that recycling iron core accounts for raw material gross weight in step 1 is less than or equal to 30%, formula
FeaSibBcIn, 77≤a≤83,0≤b≤12,8≤a≤15, preferred a=78, b=9, c=13.
It is heated preferably, the conventional raw material of Fe, Si, B are added in smelting furnace in step 2, the routine to Fe, Si, B
There is molten steel in melting sources, and when molten steel temperature is 1200-1450 DEG C, recycling iron core are added, adjusting smelting furnace heating power is
Smelting furnace maximum power melting materialss.
Preferably, when being warming up to 1300 ± 10 DEG C, keeping the temperature 10- in step 3 after material is completely melt in furnace
Slag former is added in 20min, slag hitting, sampling is carried out after 5min, with its ingredient of spectral detection.
Preferably, in step 3 slag former using the mixing of example 1: 1 in mass ratio of glass and ordinary metallurgical level-one lime and
At；The weight of slag former addition is the 0.3%-1% of raw material gross weight in step 1.
Preferably, the conventional raw material of Fe, Si, B include pure iron, metallic silicon and ferro-boron, basis in step 4 in step 1
The quality of the pure iron, metallic silicon and ferro-boron of supplement addition needed for the difference of surveyed component content and target value is calculated and weighed
Afterwards, metallic silicon is added into furnace first, pure iron is added when being then warming up to 1450 ± 10 DEG C；Continue to be warming up to 1510 ± 10 DEG C
10-15min is kept the temperature, ferro-boron is added, keeps the temperature melting 3-5min.
Preferably, smelting furnace heating power is reduced to 0kW first in step 5, starts bottom blowing and protect gas, when temperature is down to
30min is kept the temperature at 1350 ± 10 DEG C.
Preferably, the protection gas that bottom blowing uses in step 5 be argon gas or nitrogen, the air-blowing quantity 215L/min of bottom blowing,
Gassing time is 30-60min.
Preferably, the protection gas that bottom blowing uses is argon gas, the air-blowing quantity 11L/min of bottom blowing, gassing time 50min.
Preferably, smelting furnace heating power is reduced to 0kW in step 6, it is cooled to open to material and pours temperature 1300-1400
After DEG C, calm 10-30min, and slag hitting samples, and tapping is cast for the Fe-based amorphous master alloy of required shape.
Compared with prior art, the advantages and positive effects of the present invention are: providing recycling amorphous transformer core weight
The molten process smelted.This method, can be by the iron core smelting again of the discarded amorphous transformer of recycling to removal of impurity height
Refining is easy to that the Fe-based amorphous master alloy with demand that meets amorphous alloy ribbon system is made, can reach and economize on resources and reduce production
The effect of cost.
Detailed description of the invention
Influence relation curve of Fig. 1 gas with various to impurity thing removal rate；
Influence relation curve of Fig. 2 different air-blowing quantities to impurity thing removal rate；
Fig. 3 impurity thing removal rate is with gassing time change curve；
Influence relation curve of Fig. 4 different argon gas air-blowing quantities to remelting smelting process desulfurization degree；
Influence relation curve of Fig. 5 argon gas air-blowing quantity to KS.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to guarantor of the present invention
The range of shield.
Embodiment 1
It is a kind of recycle amorphous transformer core refusion and smelting process, using raw material include recycling iron core and Fe,
The conventional raw material of Si, B, auxiliary material include slag former, and recycling iron core is the discarded amorphous transformer for removing glue processing after recycling through oil removing
Core material, the process the following steps are included:
Step 1, according to formula FeaSibBcFe-based amorphous alloy atomic percent ratio calculating weigh the normal of Fe, Si, B
Raw material is advised, weighs recycling iron core by certain weight percent, it is spare；
The conventional raw material of Fe, Si, B are added in smelting furnace and heat by step 2, and the conventional raw material to Fe, Si, B melts out
After existing molten steel, recycling iron core is added, adjusts smelting furnace heating power melting materialss；
Slag former is added after material is completely melt in furnace in step 3, then carries out slag hitting, sampling, uses spectral detection
Its ingredient；
Step 4, the Fe of supplement addition needed for being calculated and being weighed according to the difference of surveyed component content and target value,
The conventional raw material quality of Si, B adjust heating power, and the conventional raw material of Fe, Si, B is added；
Step 5 reduces heating power, material is made to cool down, using the logical protection gas of bottom blowing mode in the step process；
Step 6, after material is cooled to and opens and pour temperature, slag hitting is sampled, and tapping is cast for the iron-based non-of required shape
Brilliant master alloy.
Above-mentioned smelting process is using the core material of the discarded amorphous transformer recycled as smelting iron-based amorphous master alloy
One of primary raw material can reach the effect for economizing on resources and reducing production cost, and fill in step 5 using bottom blowing process
Enter to protect gas, can full and uniform disturbance molten steel, keep molten bath ingredient and temperature uniform, molten steel air-breathing in smelting process can be reduced,
Finished product amorphous alloy impurity content is reduced, to removal of impurity height, can adapt to the iron core of the discarded amorphous transformer of recycling
Again the removal of impurities requirement smelted is easy to that the Fe-based amorphous master alloy with demand that meets amorphous alloy ribbon system is made.
2 bottom blowing process parameter study of embodiment:
In order to ensure bottom blowing effect, the protection gas of the bottom blowing in step 5 is argon gas or nitrogen, preferably argon gas.It selects
The reason of argon gas is that argon gas belongs to inert gas, is not chemically reacted with any other element, is conducive to improve the pure of molten steel
Cleanliness.The reason of selecting nitrogen is that the price of nitrogen is lower, and nitrogen and other elements a possibility that reacting is also relatively
It is few.
The present embodiment tests the shadow using argon gas or nitrogen to final product impurity thing removal rate using conventional method respectively
It rings, gained relation curve is as shown in Figure 1.It can be found that under the same conditions, in one timing of air-blowing quantity, being passed through argon gas ratio and being passed through
Nitrogen is more preferable to the removal effect of impurity thing.Its reason is analyzed, argon gas is inert gas, will not be with any element in molten steel
It reacts, can guarantee that the gas is utilized effectively.And nitrogen may react with certain elements in molten steel, such as
It is reacted with the B element in molten steel and generates BN and generate new impurity thing and be unfavorable for making full use of for nitrogen.
The air-blowing quantity and gassing time that the present embodiment explores the bottom blowing process used in step 5 by taking argon gas as an example are to smelting
The influence of sweetening process impurities removing efficiency and desulfurization effect.
Impurities removing efficiency test:
The present embodiment tests under conditions of blow-out position is 0.3R, gassing time 30min, different air-blowing quantities
Influence to impurity thing removal rate, gained relation curve are as shown in Figure 2, it is found that impurity thing removal rate is 2- in air-blowing quantity
Overall effect is preferable within the scope of 15L/min, and impurity thing removal rate is more than 30% or more.Impurity thing removal rate is in air-blowing quantity
Effect is best when 11L/min, can reach 37%.
Inventor combines its reason of test result analysis: the recycle stream when tolerance very little being blown by air brick, in furnace
Speed is low, and impurity thing is caused to be difficult to float；With the increase of bottom blowing tolerance, the tubulence energy of circulation is also increased with it in furnace, tubulence energy
Increase accelerate biphase gas and liquid flow to the conveying speed of molten steel, the rate of circulating flow of molten steel increases, and promotes impurity thing on
It is floating, to increase the removal amount of impurity thing；Continuing to increase with air-blowing quantity, the rate of circulating flow variation of molten steel is no longer obvious,
Lead to the appearance of slag phenomenon, gradually weakens so as to cause the removal ability of impurity thing.I.e. in the smelting process of the application, adopt
It can be increased with the rising of air-blowing quantity with the removal rate of bottom blowing process, field trash, but increasing liquid level to a certain extent can go out
Existing slag phenomenon, causes removal rate to decline.
It is 0.3R that the present embodiment, which is also tested in blow-out position, and under conditions of air-blowing quantity is constant, impurity thing removal rate is with blowing
The variation of gas time, acquired results are as shown in Figure 3, it is found that with the increase of gassing time, impurity thing removal rate is presented
The trend reduced afterwards is first increased, is within the scope of 30-60min in gassing time, impurity thing removal rate is relatively high, reaches 25%
More than.
Inventor combines its reason of test result analysis: when gassing time is shorter, the rate of circulating flow in furnace is relatively low, gas
Liquid two-phase is lower to the conveying speed of molten steel, and impurity thing is difficult to float, and causes impurity thing removal rate lower；When with blowing
Between increase, the tubulence energy of circulation also increases with it in furnace, and the increase of tubulence energy makes biphase gas and liquid flow to the conveying speed of molten steel
Accelerate, the rate of circulating flow of molten steel increases, and promotes impurity thing to float therewith, to increase the removal amount of impurity thing；And when air blowing
After 60min, the field trash that can be removed almost all removals handle the longer time if blowing, have little significance.
Desulfurization effect test
The present embodiment uses conventional method to test in blow-out position as 0.3R, fixed gassing time (50min), different
Influence of the argon gas air-blowing quantity to remelting smelting process desulfurization degree, gained relation curve as shown in fig. 4, it can be seen that, certain
Argon amount within the scope of, with the increase of Argon amount, desulfurization degree increases.After the ton steel amount of blowing reaches a certain amount of, desulfurization degree increases
Slowly, i.e., there are a critical Argon amounts for discovery, and after Argon amount is more than critical value, i.e., Argon amount will excessively deteriorate desulfurization effect
Fruit.
The present embodiment be also tested for gassing time be 50min when, influence of the argon gas air-blowing quantity to KS, acquired results such as Fig. 5
Shown, as seen from Figure 5 as the increase of argon flow, KS increase therewith, i.e., stirring intensity is bigger, and the apparent of molten steel takes off
Sulphur coefficient is bigger, is more conducive to shorten the heat, reduces energy consumption, improves desulfurization effect.
In summary test result, for impurity removal effect and desulfurization effect, in above-mentioned smelting process, in step 5
The protection gas that bottom blowing uses is preferably nitrogen and argon gas, and bottom blowing process parameter is preferably air-blowing quantity 2-15L/min, gassing time
For 30-60min.The further preferably protection gas that uses of bottom blowing is argon gas, the air-blowing quantity 11L/min of bottom blowing, and gassing time is
50min。
Embodiment 3 recycles iron core proportion measurement:
In order to enable the ingredient of Fe-based amorphous master alloy made from the smelting process of the application to meet amorphous alloy ribbon
System band demand, the present embodiment by it is following experiment and analysis determined recycling iron core in the feed be suitably to match.
1, sample composition measurement test:
Test material:
Raw material and proportion: the conventional raw material and recycling iron core of Fe, Si, B, the conventional raw material of Fe, Si, B are pure iron, metal
Silicon and ferro-boron, recycling iron core are the discarded amorphous transformer core material for removing glue processing after recycling through oil removing；According to formula
Fe78Si9B13The calculating of Fe-based amorphous alloy atomic percent ratio weigh pure iron, metallic silicon and ferro-boron, recycling iron core is by weight
Account for the weight percent (melting down iron core ratio) 0% of raw material gross weight, 5%, 10%, 20%, 30%, 40%, 50% difference
Ingredient.
Auxiliary material and proportion: slag former, slag former are mixed using glass and ordinary metallurgical level-one lime example 1: 1 in mass ratio
It forms；The weight of slag former addition is the 0.3% of raw material gross weight.
Sample preparation methods the following steps are included:
(1) smelting process: first melting the conventional raw material of Fe, Si, B, and after there is molten steel, the recycling of both certainty ratios is added
Iron core is melted by smelting furnace maximum power；
(2) after molten steel is completely melt, 1450 degree are warming up to, 10min is kept the temperature, cools to 1300 degree, calms after 10min, adds
Enter slag former, slag hitting sampling, gained sample includes spectrum steel ingot sample and N0 test specimens.
Sample test test:
Composition detection:
The present embodiment is tested respectively using different proportion recycling iron core using spectral detection as spectrum made from raw material
The element component content of steel ingot sample, spectral detection result are as shown in the table:
It can be seen from the results above that as the proportion of recycling iron core is gradually increased, the content of each element in steel ingot
Changed.It has a declining tendency for the content of host element Si, B, it is ensured that the content of Si, B reach in output master alloy
Target component needs additionally to add certain Si, B and carries out feed supplement, the i.e. Fe-based amorphous mother using recycling iron core as raw material
It need to include Si, B raw material feed supplement step in alloy smelting technique；For microelement: the content of C, S, P, AI are in recycling iron core
Ratio reach 20% after, be all stepped up, until part microelement is above standard limit value.
It is mingled with detection:
The present embodiment has evaluated different proportion as metallographic method and has recycled folder of the iron core as spectrum steel ingot sample made from raw material
Miscellaneous testing result, it is as shown in the table that gained is mingled with statistical result:
As can be seen from the above table, sample is mingled with number as the ratio of recycling iron core increases, and the quantity that is mingled with occurs one
Fixed rising, the result is to a certain extent with spectral detection the result is that corresponding.
The test of nitrogen oxygen content:
The present embodiment carries out the test of nitrogen oxygen content as N0 test specimens made from raw material to different proportion recycling iron core, surveys
Test result is as shown in the table:
As can be seen from the above table, as the ratio of the recycling iron core increases, the content of N element is held essentially constant, 0
Content is being gradually increased, and is more than especially after 30% in ratio, the quantity that 0 content and pure metal raw material is smelted increases
1 times.It should recycle the increased amount of of iron core to introduce a large amount of oxidisability folder simultaneously, in molten steel that inventor, which thinks,
It is miscellaneous, cause 0 content in molten steel to increase, influences quality of molten steel.I.e. as the ratio of recycling iron core is stepped up, quality of molten steel exists
Decline.
As a result comprehensive analysis:
Can be seen that the increasing with recycling iron core ratio from above-mentioned test result, microelement in molten steel, be mingled with,
And 0 variation for occurring of content, quality of molten steel can decline.In conjunction with Fe-based amorphous alloy strip system band demand, comprehensive analysis is above-mentioned
3 test as a result, without other processing in the case where, to recycle iron core as the original of smelting iron-based amorphous master alloy
When material, to ensure that Fe-based amorphous master alloy obtained meets the ingredient standard demand of band processed, recycling iron core accounts for the weight of total raw material
Percentage is measured at most no more than 30%.
2, sample system band measure of merit is tested:
The raw material and proportion and auxiliary material and proportion that embodiment 2 uses are same as Example 1.
Fe-based amorphous alloy strip sample preparation methods the following steps are included:
(1) after there is molten steel the recycling iron core of both certainty ratios is added, by smelting in the conventional raw material for first melting Fe, Si, B
Furnace maximum power is melted；
(2) after molten steel is completely melt, 1450 degree are warming up to, keeps the temperature 10min, slag former is added, slag hitting is then carried out, takes
Sample, with its ingredient of spectral detection；
(3) pure iron, the metal of supplement addition needed for being calculated and being weighed according to the difference of surveyed component content and target value
The quality of silicon and ferro-boron successively supplements the metallic silicon, pure iron and ferro-boron of addition into raw material, wait mend it is charge melted after, heating
To 1500 DEG C, 20min is kept the temperature；
(4) heating power is reduced, material, which cools to open, pours 1350 DEG C of temperature, and after the 20min that calms, slag hitting sampling prepares system
Band；
(5) routinely belt making process band, record open the state of pouring and band weight；
(6) it samples, is heat-treated spare after the end of tape processed.
Different proportion recycles iron core as opening for raw material band and pours record and system band delivery rate result statistics such as following table institute
Show:
From upper table result it can be seen that (1) under the conditions of identical belt making process, recycles iron core from opening in the state of pouring
Ratio reaches after 10%, it may appear that striping effect, by adjusting can normal band processed；When recycling iron core ratio reaches 40%, though
So can occur side at band, band, with narrow situation, illustrate that occurring clogging at nozzle illustrates addition recycling iron core
Addition, affect the content of each microelement in molten steel, quality of molten steel caused to decline, cause to open the state of pouring bad；(2) from
System band delivery rate on see, conclusion be it is identical, with recycling iron core ratio increase, can not be complete adjusting process parameter
At entire system band process, as the spray band time extends, strip quality deteriorates or nozzle blocks up stop-spraying.Comprehensive analysis cost of material and
Different proportion recycles system band effect of the iron core as raw material, to ensure system band effect, and recycling iron core accounts for the weight hundred of total raw material
Divide than being limited to be no more than 30%.
Comprehensive analysis tests 1 and 2 test result, it can be deduced that preferred embodiment: process described in embodiment 1
The weight percent that recycling iron core accounts for raw material gross weight in step 1 is less than or equal to 30%, formula FeaSibBcIn, 77≤a≤83,0
≤ b≤12,8≤a≤15, preferred a=78, b=9, c=13.In above scheme, recycling iron core accounts for the weight of raw material gross weight
Measuring percentage can be any value in 0%-30%, such as 5%, 10%, 20%, 30%, preferably 20%.
This gives recycling iron cores to mix with conventional Fe-based amorphous alloy raw materials for metallurgy as Fe-based amorphous alloy
Recycling iron core can be used for Fe-based amorphous master alloy using the proportion and smelted, and is made by the reasonable proportion scale of raw materials for metallurgy
Meet master alloy of the amorphous alloy ribbon system with demand, achievees the purpose that the production cost that economizes on resources and reduce.In the present embodiment
The weight percent that disclosed recycling iron core accounts for raw material gross weight is less than or equal to 30%, can not carry out other to recycling iron core
In the case where processing, ensure that Fe-based amorphous master alloy obtained meets the system band demand of Fe-based amorphous alloy strip, and can protect
Hinder alloy system band effect.
It is heated specifically, the conventional raw material of Fe, Si, B are added in smelting furnace in step 2, to the conventional former of Fe, Si, B
There is molten steel in material fusing, and when molten steel temperature is 1200-1450 DEG C, recycling iron core is added, adjustings smelting furnace heating power is smelting
Furnace maximum power melting materialss.Molten steel temperature when iron core being added in above-mentioned steps can be any in 1200-1450 DEG C
Value, such as 1200 DEG C, 1250 DEG C, 1300 DEG C, 1350 DEG C, 1400 DEG C, 1450 DEG C.
Step 2 using recycling iron core molten steel fed to boiler out distributing mode, if inventor study discovery using will
The conventional raw material of recycling iron core and Fe, Si, B put into the conventional distributing mode of smelting furnace melting, the shape of one side iron core together
Fixing and taking up space causes to have between raw material a large amount of vacant gap to be not easy induction heating, the weight of another aspect iron core
The ratio for occupying a part of Fe raw material declines the material rate that can be incuded, can extend the raw material duration of heat.Compared to routine
Distributing mode, the duration of heat needed for the distributing mode of the present embodiment melts raw material is shorter, and this distributing mode can be saved
Time and cost improve production efficiency.
Specifically, when being warming up to 1300 ± 10 DEG C, 10-20min is kept the temperature in step 3 after material is completely melt in furnace,
Slag former is added, slag hitting, sampling are carried out after 5min, with its ingredient of spectral detection.Holding temperature can be 1300 in above-mentioned steps
Any value in ± 10 DEG C, such as 1290 DEG C, 1300 DEG C, 1310 DEG C, soaking time is any value, such as 10min in 10-20min,
15min, 20min.
Specifically, in step 3 slag former using the mixing of example 1: 1 in mass ratio of glass and ordinary metallurgical level-one lime and
At；The weight of slag former addition is the 0.3%-1% of raw material gross weight in step 1.Slag former adding proportion in above-mentioned steps
It can be any value in 0.3%-1%, such as 0.3%, 0.5%, 0.7%, 0.9%, 1%.
Specifically, the conventional raw material of Fe, Si, B include pure iron, metallic silicon and ferro-boron in step 1, according to institute in step 4
After the pure iron, metallic silicon of supplement addition needed for the difference of survey component content and target value is calculated and weighed and the quality of ferro-boron,
Metallic silicon is added into furnace first, pure iron is added when being then warming up to 1450 ± 10 DEG C；Continue to be warming up to 1510 ± 10 DEG C of heat preservations
Ferro-boron is added in 10-15min, keeps the temperature melting 3-5min.The temperature that pure iron is added in above-mentioned steps can be to appoint in 1450 ± 10 DEG C
One value, such as 1440 DEG C, 1450 DEG C, 1460 DEG C；Holding temperature can be any value in 1510 ± 10 DEG C, such as 1500 DEG C, 1510 DEG C,
1520 DEG C, soaking time can be any value, such as 10min in 10-15min, 12min, 15min；Be added ferro-boron temperature can be
Arbitrary value in 1450 ± 10 DEG C, such as 1440 DEG C, 1450 DEG C, 1460 DEG C, smelting time can be any value, such as 3min in 3-5min,
4min, 5min.
Specifically, smelting furnace heating power is reduced to 0kW first in step 5, starts bottom blowing and protect gas, when temperature is down to
30min is kept the temperature at 1350 ± 10 DEG C.In the step, holding temperature can be any value in 1350 ± 10 DEG C, such as 1340 DEG C,
1350 DEG C, 1360 DEG C.
Specifically, smelting furnace heating power is reduced to 0kW in step 6, it is cooled to open to material and pours 1300-1400 DEG C of temperature
Afterwards, calm 10-30min, and slag hitting samples, and tapping is cast for the Fe-based amorphous master alloy of required shape.In the step, open
Pouring temperature can be any value in 1300-1400 DEG C, such as 1300 DEG C, 1350 DEG C, 1400 DEG C.
The above is only the embodiment of the present invention card, is not that the invention has other forms of limitations, appoints
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
It imitates embodiment and is applied to other fields, but it is all without departing from technical solution of the present invention content, and technology according to the present invention is real
Matter any simple modification, equivalent variations and remodeling to the above embodiments, still fall within the protection of technical solution of the present invention
Range.
Claims (10)
1. a kind of process for recycling amorphous transformer core refusion and smelting, which is characterized in that include recycling iron using raw material
The conventional raw material of core and Fe, Si, B, auxiliary material include slag former, and recycling iron core is the discarded amorphous for removing glue processing after recycling through oil removing
Transformer fe core material, the process the following steps are included:
Step 1, according to formula FeaSibBcFe-based amorphous alloy atomic percent ratio calculate and weigh the conventional former of Fe, Si, B
Material, weighs recycling iron core by certain weight percent, spare；
The conventional raw material of Fe, Si, B are added in smelting furnace and heat by step 2, and steel occurs in the conventional raw material fusing to Fe, Si, B
After liquid, recycling iron core is added, adjusts smelting furnace heating power melting materialss；
Step 3, after material is completely melt in furnace, be added slag former, then carry out slag hitting, sampling, with spectral detection its at
Point；
Step 4, Fe, Si, B of supplement addition needed for being calculated and being weighed according to the difference of surveyed component content and target value
Conventional raw material quality adjusts heating power, and the conventional raw material of Fe, Si, B is added；
Step 5 reduces heating power, material is made to cool down, using the logical protection gas of bottom blowing mode in the step process；
Step 6, after material is cooled to and opens and pour temperature, slag hitting is sampled, tapping, is cast for the Fe-based amorphous of required shape and female is closed
Gold.
2. the process of recycling amorphous transformer core refusion and smelting according to claim 1, which is characterized in that step
The weight percent that recycling iron core accounts for raw material gross weight in one is less than or equal to 30%, formula FeaSibBcIn, 77≤a≤83,0≤b≤
12,8≤a≤15, preferred a=78, b=9, c=13.
3. the process of recycling amorphous transformer core refusion and smelting according to claim 1, which is characterized in that step
The conventional raw material of Fe, Si, B are added in smelting furnace in two and heated, molten steel, and steel occurs in the conventional raw material fusing to Fe, Si, B
When liquid temperature is 1200-1450 DEG C, recycling iron core is added, adjusting smelting furnace heating power is smelting furnace maximum power melt
Material.
4. the process of recycling amorphous transformer core refusion and smelting according to claim 1, which is characterized in that step
In three after material is completely melt in furnace, when being warming up to 1300 ± 10 DEG C, 10-20min is kept the temperature, slag former is added, after 5min
Slag hitting, sampling are carried out, with its ingredient of spectral detection.
5. the process of recycling amorphous transformer core refusion and smelting according to claim 4, which is characterized in that step
Slag former is mixed using glass and ordinary metallurgical level-one lime example 1: 1 in mass ratio in three；Slag former addition weight be
The 0.3%-1% of raw material gross weight in step 1.
6. the process of recycling amorphous transformer core refusion and smelting according to claim 1, which is characterized in that step
The conventional raw material of Fe, Si, B include pure iron, metallic silicon and ferro-boron in one, according to surveyed component content and target value in step 4
After the pure iron, metallic silicon of supplement addition needed for difference is calculated and weighed and the quality of ferro-boron, metallic silicon is added into furnace first,
Pure iron is added when being then warming up to 1450 ± 10 DEG C；Continue to be warming up to 1510 ± 10 DEG C of heat preservation 10-15min, ferro-boron, heat preservation is added
Melting 3-5min.
7. the process of recycling amorphous transformer core refusion and smelting according to claim 1, which is characterized in that step
Smelting furnace heating power is reduced to 0kW first in five, starts bottom blowing and protects gas, keeps the temperature 30min when temperature is down to 1350 ± 10 DEG C.
8. the process of recycling amorphous transformer core refusion and smelting according to claim 7, which is characterized in that step
The protection gas that bottom blowing uses in five is argon gas or nitrogen, the air-blowing quantity 2-15L/min of bottom blowing, gassing time 30-60min.
9. the process of recycling amorphous transformer core refusion and smelting according to claim 8, which is characterized in that bottom blowing
The protection gas used is argon gas, the air-blowing quantity 11L/min of bottom blowing, gassing time 50min.
10. the process of recycling amorphous transformer core refusion and smelting according to claim 1, which is characterized in that step
Smelting furnace heating power is reduced to 0kW in rapid six, and after molten steel is cooled to and opens and pour 1300-1400 DEG C of temperature, calm 10-30min, beats
Slag samples, and tapping is cast for the Fe-based amorphous master alloy of required shape.
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| CN114594073A (en) * | 2022-01-25 | 2022-06-07 | 虔东稀土集团股份有限公司 | Rare earth metal production online detection method and system |
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