CN107385264A - Utilize the method for the clay standby silicon alloy of useless silicon - Google Patents
Utilize the method for the clay standby silicon alloy of useless silicon Download PDFInfo
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- CN107385264A CN107385264A CN201710590600.1A CN201710590600A CN107385264A CN 107385264 A CN107385264 A CN 107385264A CN 201710590600 A CN201710590600 A CN 201710590600A CN 107385264 A CN107385264 A CN 107385264A
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- silicon
- molten metal
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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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1068—Making hard metals based on borides, carbides, nitrides, oxides or silicides
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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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
Abstract
The present invention relates to a kind of method using the clay standby silicon alloy of useless silicon, comprise the following steps：A, by the carborundum after useless silicon mud initial gross separation and silica flour mixture high-temperature fusion, the mould that upper molten shape silicon molten metal is poured into after preheating condenses；B, part silicon is reentered into stove, furnace temperature rises to 1550 DEG C, adds iron powder while stirring, treats that iron powder melts, adds coverture, is incubated standby；C, excess silicon is poured into stove, furnace temperature rises to 850 DEG C, adds aluminium powder, adds coverture, is incubated standby；D, manganese elemental metals, Antaciron, copper simple substance metal is added portionwise, heats, while opens Vltrasonic device reaction；E, molten metal is put into mould extrusion forming.A process for preparing silicon alloy density it is low, thermal conductivity is high, good conductivity, hardness are high, thermo mechanical stability is excellent, compactness is high the features such as, whole production process realizes zero-emission, solves the field and protrudes environmental issue.
Description
Technical field
The present invention relates to a kind of method using the clay standby silicon alloy of useless silicon.
Background technology
In recent years photovoltaic industry due to production capacity it is seriously superfluous, in industry each manufacturer's technological innovation and drop this
Pressure is serious all the more, and the silicon chip cutting link as one of main production link among photovoltaic whole production line is similarly
So.
Caused waste mortar commission other factory continue after recycling offline after silicon chip manufacturer carries out silicon chip cutting
Carry out silicon chip processing use, but due to the yield that the limitation of technology and technique causes waste mortar to reclaim offline is relatively low and into
This is higher.By technological innovation with improving, it is online that waste mortar is installed in silicon chip workshop by current most silicon chip manufacturers
Recovery system, carry out voluntary recall processing waste mortar.Compared with offline recovery, online recycling waste mortar high income, cost declines
Substantially（Mortar cost can decline more than 50%）, and be easy to manage.
For now, the recovery of monocrystalline silicon and polycrystalline silicon cut waste and using there is also some problems, without can
Really realize industrial treatment.With physical partition method to reclaim high-purity silicon powder and carborundum, due to silicon and some things of carborundum
Rationality matter is similar, causes separation difficult, most of simply to reclaim carborundum therein, the recovery for HIGH-PURITY SILICON, its method is also
It is not mature enough.Reclaimed using partition method, often in the presence of some drawbacks and defect, high for equipment requirement, energy consumption is big, not economical enough
Rationally.
Therefore, for caused silicon mud in photovoltaic industry silicon chip production link waste mortar online recycling processing procedure
Recycle and there is larger economic benefit, and the pollution to environment can be mitigated.
Raw material used in fusion alloying mainly have fine aluminium, the trade mark one, and aluminium content is not less than silicon metal, and silicone content is more than
Fine copper, copper content are pure magnesium, and content of magnesium is.The composition proportion of coverture is shown in Table, and refining agent used is.Alterant is red phosphorus powder
Purity is.The alloying elements such as silicon, iron, manganese are added in the form of intermediate alloy one, one, one.
The content of the invention
The technical problem to be solved in the present invention is：A kind of overcome the deficiencies in the prior art, there is provided the clay standby silicon alloy of useless silicon
Method, solve the wasting of resources in useless silicon mud processing procedure in the past and pollute the technical problem of environment.
The technical solution adopted for the present invention to solve the technical problems is：A kind of side using the clay standby silicon alloy of useless silicon
Method, comprise the following steps：
A, useless silicon mud initial gross separation is gone out into carborundum, silica flour mixture and polyethylene glycol, carborundum and silica flour mixture is existed
1400~1550 DEG C of progress high-temperature fusions, are stirred using agitating device, and powder to be mixed is not melting, and stops stirring, continues to protect
30~60min of temperature is held, the mould that upper molten shape silicon molten metal is poured into after preheating condenses, and removes undissolved powder；
B, part silicon being reentered into stove, furnace temperature rises to 1400~1550 DEG C, adds iron powder while stirring, treats that iron powder dissolves,
In upper strata plus one layer of coverture, be incubated 3-5h, the mould that molten metal is poured into preheating condenses, the mass ratio of silicon and iron for 40~
80：10~20；
C, excess silicon is poured into stove, furnace temperature rises to 750-850 DEG C, adds aluminium powder, and adds one layer of coverture on upper strata, is incubated
3-5h, the mould that molten metal is poured into preheating condense, and the mass ratio of silicon and aluminium is 15~30：65~90；
D, silico-aluminum is put into and be provided with the stove of two different frequency Vltrasonic devices, be warming up to 700-800 DEG C, then add in batches
Enter manganese elemental metals, Antaciron, copper simple substance metal, be sufficiently stirred, one layer of coverture is added on molten metal upper strata, then by furnace temperature
800-900 DEG C is risen to, while opens Vltrasonic device, the ultrasonic wave of different frequency constantly shakes body of heater inner metal liquid, insulation 3~
5h；
E, add refining agent to refine molten metal, 3~5h is stood afterwards, when molten metal is cooled to 500~600 DEG C, by gold
Category liquid is put into mould extrusion forming, and extruding force is at 3000~5,000,000 Ns, and the time is in 10~15s.
Further, coverture is the compound of residue carborundum, sodium chloride and potassium chloride, and quality proportioning is 10~30：
20~40：30~50.
Further, refining agent C2Cl6And/or CCl4。
Further, Vltrasonic device is respectively height frequency, and high section is 80~120KHZ, and low section is 30~60KHZ.
The beneficial effects of the invention are as follows：Enable to solar silicon wafers to cut the silicon in waste mortar by this method and reclaim profit
With, and the silicon alloy density prepared is low, thermal conductivity is high, good conductivity, hardness are high, thermo mechanical stability is excellent, compactness is high
The features such as, whole production process realizes zero-emission, solves the field and protrudes environmental issue.
Brief description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is using silicon alloy obtained by commonsense method；
Fig. 2 is using silicon alloy obtained by the inventive method.
Embodiment
Presently in connection with specific embodiment, the present invention is further illustrated.These accompanying drawings be simplified schematic diagram only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
A kind of method using the clay standby silicon alloy of useless silicon, comprise the following steps：
A, useless silicon mud initial gross separation is gone out into carborundum, silica flour mixture and polyethylene glycol, carborundum and silica flour mixture is existed
1400~1550 DEG C of progress high-temperature fusions, are stirred using agitating device, and powder to be mixed is not melting, and stops stirring, continues to protect
30~60min of temperature is held, the mould that upper molten shape silicon molten metal is poured into after preheating condenses, and removes undissolved powder；
B, part silicon being reentered into stove, furnace temperature rises to 1400~1550 DEG C, adds iron powder while stirring, treats that iron powder dissolves,
In upper strata plus one layer of coverture, be incubated 3-5h, the mould that molten metal is poured into preheating condenses, the mass ratio of silicon and iron for 40~
80：10~20；
C, excess silicon is poured into stove, furnace temperature rises to 750-850 DEG C, adds aluminium powder, and adds one layer of coverture on upper strata, is incubated
3-5h, the mould that molten metal is poured into preheating condense, and the mass ratio of silicon and aluminium is 15~30：65~90；
D, silico-aluminum is put into and be provided with the stove of two different frequency Vltrasonic devices, be warming up to 700-800 DEG C, then add in batches
Enter manganese elemental metals, Antaciron, copper simple substance metal, be sufficiently stirred, one layer of coverture is added on molten metal upper strata, then by furnace temperature
800-900 DEG C is risen to, while opens Vltrasonic device, the ultrasonic wave of different frequency constantly shakes body of heater inner metal liquid, insulation 3~
5h；Vltrasonic device is respectively height frequency, and high section is 80~120KHZ, and low section is 30~60KHZ.
E, add refining agent to refine molten metal, stand 3~5h afterwards, when molten metal is cooled to 500~600 DEG C,
Molten metal is put into mould extrusion forming, extruding force is at 3000~5,000,000 Ns, and the time is in 10~15s.
In the present embodiment, coverture be residue carborundum, sodium chloride and potassium chloride compound, quality proportioning be 10~
30：20~40：30~50.
In the present embodiment, refining agent C2Cl6And/or CCl4。
The method of the present invention, enable to solar silicon wafers to cut the silicon in waste mortar by this method and recycle, and
The spies such as silicon alloy density low, thermal conductivity is high, good conductivity, hardness height, thermo mechanical stability is excellent, compactness is high prepared
Point, whole production process realize zero-emission, solve the field and protrude environmental issue.
It is complete by above-mentioned description, relevant staff using the above-mentioned desirable embodiment according to the present invention as enlightenment
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.Come true
Its fixed technical scope.
Claims (4)
1. a kind of method using the clay standby silicon alloy of useless silicon, it is characterized in that, comprise the following steps：
A, useless silicon mud initial gross separation is gone out into carborundum, silica flour mixture and polyethylene glycol, carborundum and silica flour mixture is existed
1400~1550 DEG C of progress high-temperature fusions, are stirred using agitating device, and powder to be mixed is not melting, and stops stirring, continues to protect
30~60min of temperature is held, the mould that upper molten shape silicon molten metal is poured into after preheating condenses, and removes undissolved powder；
B, part silicon being reentered into stove, furnace temperature rises to 1400~1550 DEG C, adds iron powder while stirring, treats that iron powder dissolves,
In upper strata plus one layer of coverture, be incubated 3-5h, the mould that molten metal is poured into preheating condenses, the mass ratio of silicon and iron for 40~
80：10~20；
C, excess silicon is poured into stove, furnace temperature rises to 750-850 DEG C, adds aluminium powder, and adds one layer of coverture on upper strata, is incubated
3-5h, the mould that molten metal is poured into preheating condense, and the mass ratio of silicon and aluminium is 15~30：65~90；
D, silico-aluminum is put into and be provided with the stove of two different frequency Vltrasonic devices, be warming up to 700-800 DEG C, then add in batches
Enter manganese elemental metals, Antaciron, copper simple substance metal, be sufficiently stirred, one layer of coverture is added on molten metal upper strata, then by furnace temperature
800-900 DEG C is risen to, while opens Vltrasonic device, the ultrasonic wave of different frequency constantly shakes body of heater inner metal liquid, insulation 3~
5h；
E, add refining agent to refine molten metal, 3~5h is stood afterwards, when molten metal is cooled to 500~600 DEG C, by gold
Category liquid is put into mould extrusion forming, and extruding force is at 3000~5,000,000 Ns, and the time is in 10~15s.
2. the method according to claim 1 using the clay standby silicon alloy of useless silicon, it is characterized in that, coverture is carbonized for residue
The compound of silicon, sodium chloride and potassium chloride, quality proportioning are 10~30：20~40：30~50.
3. the method according to claim 1 using the clay standby silicon alloy of useless silicon, it is characterized in that, refining agent C2Cl6With/
Or CCl4。
4. the method according to claim 1 using the clay standby silicon alloy of useless silicon, it is characterized in that, Vltrasonic device is respectively height
Low frequency, high section are 80~120KHZ, and low section is 30~60KHZ.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710590600.1A CN107385264A (en) | 2017-07-19 | 2017-07-19 | Utilize the method for the clay standby silicon alloy of useless silicon |
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| CN201710590600.1A CN107385264A (en) | 2017-07-19 | 2017-07-19 | Utilize the method for the clay standby silicon alloy of useless silicon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616378A (en) * | 2019-09-23 | 2019-12-27 | 天津炜润达新材料科技有限公司 | Production method of high-purity silicon iron for producing silicon steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH108164A (en) * | 1996-03-29 | 1998-01-13 | Hitachi Metals Ltd | Production of aluminum composite with low thermal expansion and high thermal conductivity, and its composite |
| CN104817089A (en) * | 2015-04-21 | 2015-08-05 | 辽宁科技学院 | Method for recovering metallic silicon and silicon carbide in monocrystalline/polycrystalline silicon cutting waste pulp |
| CN106834765A (en) * | 2017-01-25 | 2017-06-13 | 东北大学 | A kind of method for preparing silicon-containing alloy with the carborundum cutting waste material of crystalline silicon |
| CN106916978A (en) * | 2017-01-25 | 2017-07-04 | 东北大学 | A kind of method for preparing silicon-containing alloy with the diamond wire cutting waste material slurry of crystalline silicon |
-
2017
- 2017-07-19 CN CN201710590600.1A patent/CN107385264A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH108164A (en) * | 1996-03-29 | 1998-01-13 | Hitachi Metals Ltd | Production of aluminum composite with low thermal expansion and high thermal conductivity, and its composite |
| CN104817089A (en) * | 2015-04-21 | 2015-08-05 | 辽宁科技学院 | Method for recovering metallic silicon and silicon carbide in monocrystalline/polycrystalline silicon cutting waste pulp |
| CN106834765A (en) * | 2017-01-25 | 2017-06-13 | 东北大学 | A kind of method for preparing silicon-containing alloy with the carborundum cutting waste material of crystalline silicon |
| CN106916978A (en) * | 2017-01-25 | 2017-07-04 | 东北大学 | A kind of method for preparing silicon-containing alloy with the diamond wire cutting waste material slurry of crystalline silicon |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616378A (en) * | 2019-09-23 | 2019-12-27 | 天津炜润达新材料科技有限公司 | Production method of high-purity silicon iron for producing silicon steel |
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Application publication date: 20171124 |