CN106076613B - A kind of method recycling iron filings and Al-Fe intermediate alloys obtained - Google Patents
A kind of method recycling iron filings and Al-Fe intermediate alloys obtained Download PDFInfo
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- CN106076613B CN106076613B CN201610528045.5A CN201610528045A CN106076613B CN 106076613 B CN106076613 B CN 106076613B CN 201610528045 A CN201610528045 A CN 201610528045A CN 106076613 B CN106076613 B CN 106076613B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Abstract
The present invention provides a kind of method recycling iron filings and Al Fe intermediate alloys obtained, are related to iron filings recovery technology field.The method for recycling iron filings, includes the following steps：A. in (0.6~1.6) × 105Under the magnetic field intensity of A/M, magnetic separation is carried out to the iron filings generated in ironwork mechanical processing process, it is 0.1~10mm that the iron filings, which are then crushed to grain size, is used as preparing the raw material of Al Fe intermediate alloys.Method provided by the invention is at low cost, simple for process, and the ferro element rate of recovery is higher.
Description
Technical field
The present invention relates to iron filings recovery technology fields, in particular to a kind of method recycling iron filings and are made
Al-Fe intermediate alloys.
Background technology
With the fast development of mechanical industry, the iron filings generated in mechanical processing process are more and more, since iron filings piece is thin,
The surface area of iron filings is big, and large contact area with air easily aoxidizes, and causes damages, and should not store for a long time, need in time, rationally, have
Effect ground recycles.The mode that iron filings commonly recycle (reuse) has：(1) it is sintered reuse, iron filings are heated to rubescent shape
State is pressurizeed blocking in mold, then melts down smelting.But because iron filings piece is thin, heating is oxidizable, and severe operational environment, Ci Zhongfang
Formula is gradually eliminated.(2) briquetting reuse, using metal scrap briquetting machine or forcing press by iron filings the briquet in mold, then
Smelting is melted down, can automatically continuously be produced.(3) smelt diluting agent, iron filings can dilute the dense of ferroalloy in corundum abrasive smelting
Degree, improves the sense magnetic property of ferroalloy, but on condition that the aluminium content in iron filings is necessarily less than 0.4%.(4) stove is directly thrown to use,
Iron filings are directly thrown into the elevated furnace of furnace cupola, intermediate frequency furnace or special fusing iron filings, smelt reuse.
(1) kind, (2) kind, (4) kind of aforesaid way are directed to and melt down smelting, but since the fusing point of iron is up to
It 1535 DEG C, during refusion and smelting iron filings, needs to limit inlet amount, extends fusing time.Disappear in this way, just increasing the energy
Consumption and oxidational losses, reduce the production efficiency of smelting equipment, and damage smelting equipment also needs moreover, for refusion and smelting iron filings
Additional auxiliary equipment is installed, therefore energy consumption and cost that iron filings are recycled and utilized are very high always.
It is improved and is innovated with problem for the shortcomings that being encountered in iron filings refusion and smelting reuse technology, it is proposed that use iron
Bits go to prepare afterproduct, and industrial chemicals or chemical reagent can be produced by recycling iron filings.Such as：(1) FeSO is produced4.It utilizes
Iron filings and pickle liquor reaction generate FeSO4, FeSO is made4Reagent reaches the mesh for recycling iron filings and reducing waste liquid acidity
, it is suitable for the processing of sulfuric acid washing waste water.(2) production polymerization FeCl3.Iron filings are reacted with technical hydrochloric acid or acid pickle, it is raw
At FeCl2Solution is passed through strong oxidizer (Cl2) when, generate more stable FeCl3, FeCl3It reacts, is re-converted into iron filings
FeCl2, work as FeCl2It when reaching a certain concentration, is catalyzed, aoxidized, generate polymerization FeCl3, in this way, reaching purifying waste exhaust gas
(acid pickle, waste chlorine) and the purpose for recycling iron filings.But during above-mentioned use iron filings prepare afterproduct, reuse work
Skill condition requires harshness, and both of which needs a series of chemical reaction, production technology complicated.In addition, production FeSO4Only
Suitable for the processing of sulfuric acid washing waste water, (even target is FeSO4, iron filings are only applicable to obtain with sulfuric acid washing waste water reaction)；
Production polymerization FeCl3Cl need to be passed through2As strong oxidizer, while catalysis oxidation is needed, equipment cost is high, cannot be satisfied large batch of
The requirement of iron filings reuse, the ferro element rate of recovery are low.
Invention content
The purpose of the present invention is to provide a kind of methods recycling iron filings, and the method is at low cost, simple for process, iron member
The plain rate of recovery is higher.
Another object of the present invention is to provide a kind of Al-Fe intermediate alloys, and the Al-Fe intermediate alloys are at low cost, are applicable in
In industrial production.
The present invention solves its technical problem using following technical scheme to realize：
A method of iron filings are recycled, are included the following steps：
A. in (0.6~1.6) × 105Under the magnetic field intensity of A/M, to the iron filings that are generated in ironwork mechanical processing process into
Row magnetic separation, it is 0.1~10mm that iron filings, which are then crushed to grain size, is used as preparing the raw material of Al-Fe intermediate alloys；
B. according to chemical formula AlFenIron filings after weighing aluminium material and crushing, wherein n is the integer in 5~20；
C. after aluminium material being melted, refining agent is added, obtains fusant；
D. fusant is warming up to 905~915 DEG C, keeps the temperature 5~10min, the iron filings after crushing then are added, and make iron filings
Positioned at 1/2 position below of melt height, after iron filings dissolve, stirring obtains mixture；
E. dehydrogenation, casting are carried out to mixture.
The mass ratio of above-mentioned refining agent and aluminium material is 0.3~0.5:100.
In above-mentioned steps c, refining agent is the refining agent by the pre-heat treatment, and the pre-heat treatment includes：At 110~120 DEG C
Heating, until the water content in refining agent is below 0.5%.
Preferably, in a preferred embodiment of the present invention, above-mentioned steps d further comprises：
D1. fusant is warming up to 905~915 DEG C, keeps the temperature 5~10min, then 40 are added by bell jar plunging~
Iron filings after the crushing of 60wt%, and 1/2 position below for making iron filings be located at melt height is stirred after iron filings dissolve；
D2. it is warming up to 905~915 DEG C again, keeps the temperature 5~10min, the crushing of surplus is then added by bell jar plunging
Iron filings afterwards, and 1/2 position below for making iron filings be located at melt height stirs to get mixture after iron filings dissolve.
Preferably, in a preferred embodiment of the present invention, in above-mentioned steps e, dehydrogenation includes：Adjusting mixture temperature is
760~780 DEG C, stand 3~5min, then skimming, degasification.
Preferably, in a preferred embodiment of the present invention, above-mentioned degasification includes：It is passed through degasification gas using getter, until
The hydrogen content of mixture in 0.2mL/100gAl hereinafter, be then allowed to stand 10~15min, skimming.
Preferably, in a preferred embodiment of the present invention, above-mentioned degasification gas in nitrogen, inert gas, chlorine one
Kind is a variety of, and preferably nitrogen and chlorine is according to volume ratio 20~50:1 mixture.
Preferably, in a preferred embodiment of the present invention, above-mentioned getter includes breather plug and gas blow pipe, breather plug with blow
Pipe connects, and the consent aperture of breather plug is 20~140 μm.
In addition, a kind of Al-Fe intermediate alloys, are made by the method for above-mentioned recycling iron filings.
Compared with the existing technology, the present invention includes following advantageous effect：The present invention generates ironwork in process
Iron filings re-use, go out a kind of relatively low and up-to-standard ferro-aluminum intermediate alloy of price with aluminium co-manufactured.It is existing
In technology to the recovery utilization rate of ferro element 85% hereinafter, and it is provided by the invention recycle iron filings method in, iron member
Plain recovery utilization rate can reach 94% or more.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The method and Al-Fe intermediate alloys obtained of the recycling iron filings of the embodiment of the present invention are carried out specifically below
It is bright.
The method for recycling iron filings includes the following steps：
Step A：In (0.6~1.6) × 105Under the magnetic field intensity of A/M, to the iron generated in ironwork mechanical processing process
Bits carry out magnetic separation, and it is 0.1~10mm that iron filings, which are then crushed to grain size, are used as preparing the raw material of Al-Fe intermediate alloys.
The iron filings generated in production and processing are subjected to magnetic separation, the magnetic field intensity of working clearance is (0.6~1.6) × 105A/
M detaches iron filings and nonmetallic inclusion with this.Wherein, magnetic separator can select low-intensity (magnetic) separator.And it is ideal in order to obtain
Separating effect can repeat magnetic separation 1~2 time, until free from admixture in iron filings.
And after magnetic separation, iron filings can also be carried out to oil removing, then dried, recycle crusher that iron filings are ground into grain size
For the crumble of 0.1~10mm.Wherein it is possible to come oil removing by way of alkali cleaning.Oil removing, drying, crushing operation be provided to
It obtains free from admixture, the iron filings crumble that bright and clean, grain size is small, when ensureing that it manufactures intermediate alloy as raw material, product can be made
High-quality ferro-aluminum intermediate alloy.
The preparation method of above-mentioned Al-Fe intermediate alloys includes step B：According to chemical formula AlFenAfter weighing aluminium material and crushing
Iron filings, wherein n be 5~20 in integer.
Wherein, the preferred aluminium ingot item of aluminium material.
The preparation method of above-mentioned Al-Fe intermediate alloys includes step C：After aluminium material is melted, refining agent is added, is melted
Object.
Melting aluminum material carries out preferably in smelting furnace.If selection is aluminium ingot item, can be in smelting furnace, along furnace wall
Aluminium ingot item is arranged, after the fusing of aluminium ingot item, just molten aluminum surface after being melted down uniformly sprinkles refining agent.
Wherein, the mass ratio of refining agent and aluminium material is 0.3~0.5:100.Refining agent is made of following raw material, and by weight hundred
Score meter：Sodium chloride 40~43%, hexafluoro sodium aluminate 5.7~6.6%, calcirm-fluoride 4.2~4.4%, prodan 0~0.5%,
Magnesium chloride 0~0.5%, barium chloride 0~0.5% and potassium chloride surplus.It is highly preferred that sodium chloride 40~43%, hexafluoro sodium aluminate
5.7~6.6%, calcirm-fluoride 4.2~4.4%, prodan 0~0.3%, magnesium chloride 0~0.3%, 0~0.3% and of barium chloride
Potassium chloride surplus.It is of course also possible to other refining agents be selected, as long as the refining agent suitable for alfer manufacture.
Refining agent is the refining agent by the pre-heat treatment, and the pre-heat treatment includes：It is heated at 110~120 DEG C, until refining
Water content in agent is below 0.5%.Refining agent is easy water suction, and excessive moisture can influence the Al-Fe intermediate alloys prepared
Quality, so the pre-heat treatment primarily to removal refining agent in moisture.General processing time is in 30min or more.
The preparation method of above-mentioned Al-Fe intermediate alloys includes step D：Fusant is warming up to 905~915 DEG C, heat preservation 5~
Then 10min is added the iron filings after crushing, and iron filings is made to be located at 1/2 position below of melt height, wait for that iron filings dissolve
Afterwards, it stirs, obtains mixture.
During existing making Al-Fe intermediate alloys, 1150 DEG C or more need to be heated to, then dissolves iron.And this
In invention, heating temperature involved in entire technique reduces only at 950 DEG C hereinafter, in this way, just reduce the requirement to equipment
Energy consumption has saved production cost.
Wherein, it when iron filings are added, is added in two portions by bell jar plunging.Since there are surfaces for liquid surface
Power may float on liquid surface so being directly added into iron filings, and be difficult to merge with liquid uniformly, by bell jar toward liquid
Or the indentation in fusant, raw material is added, and the raw material of addition is made to submerge in liquid melt, it will be able to promote iron filings and liquid
Fusion between body.And bell jar is common equipment, in industry manufactures, if disposably adding raw material, the bell jar needed is just
It is larger, and big bell jar can occupy most of volume of container, the liquid in container is caused to escape during being pressed into down
Go out, to make the raw material being just added incidentally be escaped by fusant, in this way, the loss of raw material is had led to, so, it is divided to two by iron filings
Secondary addition, avoids the use to larger bell jar, also avoids the loss of raw material effusion.
Bell jar selects the bell jar of cast iron, so, it is possible to avoid introducing other materials, causes other reactions.
When being added, bell jar can be kept to be pressed into always, up to making iron filings be located at 1/2 position below of melt height
Set, that is, fusant middle and lower part.It so, it is possible that iron filings is made to be substantially soluble in fusant, keep the two mixing preferable, to ensure
The quality of alfer obtained.When being added, it is 80~120mm that can keep bell jar distance from bottom smelting furnace bottom, with this
Meet the requirement that iron filings are located at 1/2 position below of melt height, certainly, such distance, which limits, to be not intended as limiting,
It needs to be determined according to practical smelting furnace size and bell jar size.After iron filings are added, bell jar is gently moved, waits for that iron filings all dissolve
Afterwards, blowing out stirs 1~2min with the speed of 5~10cm/s, obtains mixture.Wherein, stirring rod is the stirring rod of cast iron.
Alternatively, it is also possible to which iron filings are added by other methods.
If iron filings are added in two portions, step D further comprises：
D1. fusant is warming up to 905~915 DEG C, keeps the temperature 5~10min, then 40 are added by bell jar plunging~
Iron filings after the crushing of 60wt%, and 1/2 position below for making iron filings be located at melt height is stirred after iron filings dissolve；
D2. it is warming up to 905~915 DEG C again, keeps the temperature 5~10min, the crushing of surplus is then added by bell jar plunging
Iron filings afterwards, and 1/2 position below for making iron filings be located at melt height stirs to get mixture after iron filings dissolve.
In step D1, the iron filings after crushing are added by bell jar plunging, the addition of iron filings is preferably iron filings total amount
50%.
The preparation method of above-mentioned Al-Fe intermediate alloys includes step E：Dehydrogenation, casting are carried out to mixture.
Wherein, dehydrogenation includes：It is 760~780 DEG C to adjust mixture temperature, stands 3~5min, and then skimming removes
Gas.If temperature is too high, with regard to larger, the residual in intermediate alloy can influence the meltage of hydrogen with regard to more in mixture
The quality of intermediate alloy, and the operation for being cooled to 760~780 DEG C can effectively reduce hydrogen content.And gas is from mixture
There are a processes for effusion, so needing 3~5min of standing, then exclude the impurity generated in mixture, bits.
And degasification includes：Be passed through degasification gas using getter, until mixture hydrogen content 0.2mL/100gAl with
Under (i.e. per 100g aluminium in, hydrogen content is in 0.2mL or less), be then allowed to stand 10~15min, skimming.Degasification gas is selected from nitrogen, lazy
Property gas, one or more in chlorine, preferably nitrogen with chlorine according to volume ratio 20~50:1 mixture.Such degasification gas
The degassing effect of body is more preferable.Degasification reduces the hydrogen content of mixture, can obtain up-to-standard ferro-aluminum intermediate alloy.Getter
It is preferred that rotary degassing machine.When testing hydrogen content, it can be tested using hydrogen meter.
Getter includes breather plug and gas blow pipe, and breather plug is connect with gas blow pipe, and the consent aperture of breather plug is 20~140
μm.When the degasification gas of getter is escaped by gas blow pipe from breather plug outward, the aperture of breather plug is very small, that is to say, that
The gas outlet of degasification gas is very small, so, it will be able to reduce the size for the bubble emerged.And by reducing bubble diameter, this
The dramatic increase of a little total surface areas of bubble, this allows for more degasification bubble surfaces and the hydrogen in mixture, impurity contact,
To which these harmful substances are taken to liquid surface.Wherein, breather plug can be porous graphite plug【Porous graphite refers to total stomata
Rate is more than 45%, and bulk density is less than 1.20g/cm3Carbon product, heat treatment temperature reach graphitization temperature (2200~
3000 DEG C) be known as porous graphite】.It is of course also possible to for others, such as meet the ventilation that the refractory material of aperture requirement makes
Plug.
It is being passed through degasification gas using getter, until the hydrogen content of mixture is (i.e. every in 0.2mL/100gAl or less
In 100g aluminium, hydrogen content is in 0.2mL or less), it is then allowed to stand 10~15min, after skimming, passes through ingot of casting, so that it may with
To Al-Fe intermediate alloys.
Compared with iron filings refusion and smelting reuse, in the method provided by the invention for preparing Al-Fe intermediate alloys, step is melted
Temperature it is relatively low, energy consumption is reduced, and oxidational losses is reduced, and requirement to equipment reduces, and the expense of equipment accordingly reduces, iron filings
The rate of recovery greatly improve.And because using iron filings, the life of ferro-aluminum intermediate alloy is greatly reduced in raw material
Produce cost.Compared with using iron filings production industrial chemicals or chemical reagent, this method is raw without carrying out a series of chemical reaction
Production. art is simple, can meet the requirement of large batch of iron filings reuse.
Al-Fe intermediate alloys provided by the invention are made by the method for above-mentioned recycling iron filings.
The feature and performance of the present invention are described in further detail with reference to embodiments：
Embodiment one
It present embodiments provides and prepares AlFe using the method for recycling iron filings5Intermediate alloy includes the following steps：
A. the iron filings generated in mechanical processing process are collected, magnetic separation, selection work gap is carried out on magnetic separator
Magnetic field intensity be 0.9 × 105A/M detaches iron filings and nonmetal inclusion；
To being dried after magnetic separation treated iron filings oil removing, is crushed on crusher, be ground into the bits that size is 5mm
Material；
B. stoichiometrically AlFe5Iron filings after weighing fine aluminium ingot and crushing；
C. aluminium ingot item is arranged along furnace wall into smelting furnace, it is equal on obtained molten aluminum surface after aluminium ingot item all fusing
It is even to sprinkle refining agent, obtain fusant；Wherein, refining agent is the refining agent (refining agent after the pre-heat treatment 40min at 110 DEG C
Water content is that 0.35%), refining agent is made of following raw material, percentage：47.4% KCl, 41.5% NaCl,
6.2% Na3AlF6, 4.3% CaF2, 0.2% Na2SiF6, 0.2% MgCl2With 0.2% BaCl2；
D. fusant is warming up to 905 DEG C, keeps the temperature 5min, 1/2 iron filings are added using bell jar plunging, away from smelting furnace
At the 100mm of bottom, bell jar is gently moved, after iron filings all dissolve, blowing out, cylinder iron stirring rod is with the speed stirring of 5cm/s
1min；Wherein, bell jar is cast iron bell jar；
Smelting furnace is warming up to 905 DEG C again, keeps the temperature 5min, remaining iron filings are added using bell jar plunging, away from melting
At furnace bottom 100mm, bell jar is gently moved, after iron filings all dissolve, blowing out, cylinder iron stirring rod is with the speed stirring of 5cm/s
3min obtains mixture；Wherein, bell jar is cast iron bell jar；
E. mixture temperature is adjusted to 760 DEG C, stands skimming after 3min, is then passed through degasification gas using rotary degassing machine
Body carries out degasification, during which, hydrogen content is measured using hydrogen meter, when the hydrogen content of mixture is 0.1mL/100gAl, stops removing
Gas stands skimming after 10min, ingot of casting；Wherein, degasification gas is N2、Cl2According to volume ratio 40:The mixed gas of 1 proportioning,
The gas blow pipe of rotary degassing machine is connect with breather plug, and breather plug is porous graphite plug.
According to the method described above, the present embodiment has recorded in the case where iron filings addition slightly changes (only one variable)
Following data, referring to table 1：
Table 1
Embodiment two
On the basis of embodiment one, present embodiments provides and prepare AlFe using the method for recycling iron filings10It is intermediate
Alloy, the difference in this method only step b, iron filings addition and embodiment one, remaining operation, condition with one phase of embodiment
Together.In the present embodiment, step b is：Stoichiometrically AlFe10Iron filings after weighing fine aluminium ingot and crushing.
The present embodiment has recorded following data in the case where iron filings addition slightly changes (only one variable), referring to
Table 2：
Table 2
Embodiment three
On the basis of embodiment one, present embodiments provides and prepare AlFe using the method for recycling iron filings15It is intermediate
Alloy, the difference in this method only step b, iron filings addition and embodiment one, remaining operation, condition with one phase of embodiment
Together.In the present embodiment, step b is：Stoichiometrically AlFe15Iron filings after weighing fine aluminium ingot and crushing.
The present embodiment has recorded following data in the case where iron filings addition slightly changes (only one variable), referring to
Table 3：
Table 3
Example IV
It present embodiments provides and prepares AlFe using the method for recycling iron filings20Intermediate alloy includes the following steps：
A. the impurity in the iron filings generated in ironwork mechanical processing process is removed, iron filings, which are then crushed to grain size, is
10mm；
B. stoichiometrically AlFe20Weigh fine aluminium ingot and iron filings；
C. aluminium ingot item is arranged along furnace wall into smelting furnace, it is equal on obtained molten aluminum surface after aluminium ingot item all fusing
It is even to sprinkle refining agent, obtain fusant；Wherein, the mass ratio of refining agent and aluminium ingot item is 0.5:100, refining agent is by following raw material
It is made, percentage：46% KCl, 43% NaCl, 6.6% Na3AlF6With 4.4% CaF2；
D. fusant is warming up to 915 DEG C, keeps the temperature 10min, 60% iron filings are added using bell jar plunging, and make iron filings
Positioned at the 1/2 of melt height, bell jar is gently moved, after iron filings all dissolve, blowing out, cylinder iron stirring rod is with 10cm/s's
Speed stirs 1min, obtains primary mix；Wherein, bell jar is cast iron bell jar；
Smelting furnace is warming up to 915 DEG C again, keeps the temperature 10min, remaining iron filings are added using bell jar plunging, and make iron filings
Positioned at the 1/2 of primary mix height, gently move bell jar, after iron filings all dissolve, blowing out, cylinder iron stirring rod with
The speed of 10cm/s stirs 3min, obtains mixture；Wherein, bell jar is cast iron bell jar；
E. mixture temperature is adjusted to 780 DEG C, stands skimming after 5min, is then passed through degasification gas using rotary degassing machine
Body carries out degasification, during which, hydrogen content is measured using hydrogen meter, when the hydrogen content of mixture is 0.2mL/100gAl, stops removing
Gas stands skimming after 15min, ingot of casting；Wherein, degasification gas is N2。
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of method recycling iron filings, which is characterized in that include the following steps：
A. in (0.6~1.6) × 105Under the magnetic field intensity of A/M, magnetic is carried out to the iron filings generated in ironwork mechanical processing process
Choosing, it is 0.1~10mm that the iron filings, which are then crushed to grain size, is used as preparing the raw material of Al-Fe intermediate alloys；
B. according to chemical formula AlFenWeigh the iron filings after aluminium material and the crushing, wherein n is the integer in 5~20；
C. after the aluminium material being melted, refining agent is added, obtains fusant；The mass ratio of the refining agent and the aluminium material is
0.3~0.5:100；The refining agent is the refining agent by the pre-heat treatment, and the pre-heat treatment includes：At 110~120 DEG C
Heating, until the water content in the refining agent is below 0.5%；
D. the fusant is warming up to 905~915 DEG C, keeps the temperature 5~10min, the iron filings after the crushing is then added, and make
Iron filings are located at 1/2 position below of the melt height, and after iron filings dissolve, stirring obtains mixture；
E. dehydrogenation, casting are carried out to the mixture.
2. the method according to claim 1 for recycling iron filings, which is characterized in that step d further comprises：
D1. the fusant is warming up to 905~915 DEG C, keeps the temperature 5~10min, then 40 are added by bell jar plunging~
Iron filings after the crushing of 60wt%, and iron filings is made to be located at 1/2 position below of the melt height, wait for that iron filings dissolve
Afterwards, it stirs；
D2. it is warming up to 905~915 DEG C again, keeps the temperature 5~10min, the crushing of surplus is then added by bell jar plunging
Iron filings afterwards, and 1/2 position below for making iron filings be located at the melt height stirs to get mixing after iron filings dissolve
Object.
3. the method according to claim 1 for recycling iron filings, which is characterized in that in step e, the dehydrogenation packet
It includes：It is 760~780 DEG C to adjust the mixture temperature, stands 3~5min, then skimming, degasification.
4. the method according to claim 3 for recycling iron filings, which is characterized in that the degasification includes：Utilize degasification
Machine is passed through degasification gas, until the hydrogen content of the mixture in 0.2mL/100gAl hereinafter, be then allowed to stand 10~15min, skim
Slag.
5. it is according to claim 4 recycle iron filings method, which is characterized in that the degasification gas be selected from nitrogen,
It is one or more in inert gas, chlorine.
6. the method according to claim 4 for recycling iron filings, which is characterized in that the degasification gas is nitrogen and chlorine
Gas is according to volume ratio 20~50:1 mixture.
7. it is according to claim 4 recycle iron filings method, which is characterized in that the getter include breather plug and
Gas blow pipe, the breather plug are connect with the gas blow pipe, and the consent aperture of the breather plug is 20~140 μm.
8. a kind of Al-Fe intermediate alloys, which is characterized in that recycle iron filings by claim 1~7 any one of them
Method is made.
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|---|---|---|---|---|
| JPH0233406B2 (en) * | 1981-09-25 | 1990-07-27 | Fuji Electric Co Ltd | DENJIFUIRUTAA |
| US4743364A (en) * | 1984-03-16 | 1988-05-10 | Kyrazis Demos T | Magnetic separation of electrically conducting particles from non-conducting material |
| JP2002220607A (en) * | 2001-01-29 | 2002-08-09 | Uk:Kk | Sintering bonding method |
| CN1768965A (en) * | 2004-11-05 | 2006-05-10 | 广东省肇庆市高级技工学校 | Rotation type permanent magnet separator |
| CN101509086A (en) * | 2008-12-30 | 2009-08-19 | 毕祥玉 | Intermediate Al-Fe alloy and method of manufacturing the same |
| CN103103390A (en) * | 2012-11-09 | 2013-05-15 | 安徽欣意电缆有限公司 | Al-Fe aluminium alloy, preparation method thereof and power cable |
| CN102965527B (en) * | 2012-11-29 | 2014-07-09 | 哈尔滨理工大学 | Method for preparing aluminium-chromium intermediate alloy by using chromium shavings |
| CN103773979B (en) * | 2014-03-04 | 2016-03-30 | 哈尔滨理工大学 | The method of aluminium titanium master alloy prepared by a kind of regeneration titanium bits or titanium scrap stock |
| CN203916871U (en) * | 2014-04-29 | 2014-11-05 | 辽宁科技大学 | A kind of iron filings retracting device |
| CN103990804B (en) * | 2014-05-16 | 2016-08-24 | 江苏大学 | A kind of method recycling steel cuttings |
| CN103966452B (en) * | 2014-05-23 | 2015-12-02 | 哈尔滨理工大学 | A kind of recoverying and utilizing method of the magnesium alloy scrap containing aluminium |
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2016
- 2016-07-06 CN CN201610528045.5A patent/CN106076613B/en not_active Expired - Fee Related
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