CN105543633B - A kind of method of utilization crystal scrap silicon smelting duriron - Google Patents
A kind of method of utilization crystal scrap silicon smelting duriron Download PDFInfo
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- CN105543633B CN105543633B CN201610028345.7A CN201610028345A CN105543633B CN 105543633 B CN105543633 B CN 105543633B CN 201610028345 A CN201610028345 A CN 201610028345A CN 105543633 B CN105543633 B CN 105543633B
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
Abstract
It is 2,014 12 17 the applying date that the present invention, which is, Application No. 2014107883956, and original application is entitled：A kind of divisional application of the patent of the method for intermediate frequency furnace and its application and utilization crystal scrap silicon smelting duriron.The invention discloses a kind of method of utilization crystal scrap silicon smelting duriron, belong to crystalline silicon waste disposal field.It is, by the steel scrap shove charge needed for smelting ferrosilicon, to be then blown into silica flour waste material using the method for crystal scrap silicon smelting duriron, last Antaciron liquid is come out of the stove, by vacuum decarburization, casting cooling, smelting process terminates.The present invention reduces silica using the carbon in carborundum, reduces energy resource consumption, and need not add coke, reduces the influence of P elements and element sulphur, product ferrosilicon is low-phosphorous low-sulfur low-carbon ferrosilicon, and value is high.
Description
The present invention be the applying date be 2014-12-17, Application No. 2014107883956, original application is entitled：In one kind
The divisional application of the patent of the method for frequency stove and its application and utilization crystal scrap silicon smelting duriron.
Technical field
The invention belongs to crystalline silicon waste disposal field, specifically, it is related to one kind and utilizes crystal scrap silicon smelting duriron
Method, more specifically to the crystal scrap silicon produced in a kind of production process using solar panel come smelting Si
The method of iron.
Background technology
At present, with the development of clean energy resource, heliotechnics is developed rapidly.In the mistake of production solar panel
Cheng Zhong, has used substantial amounts of crystalline silicon, diameter 75mm silicon chip can be integrated tens of thousands of to even millions of members of hundreds of thousands
Part, forms microelectronics, so as to occur in that microcomputer, microprocessor etc..Due to the development of current information engineering, silicon master
It is used for microelectric technique.To adapt to the development of large scale integrated circuit, the positive major diameter of monocrystalline silicon, high-purity, high uniformity,
Zero defect direction is developed.Substantial amounts of 6.5 μm to 38 μm of cutting silica flour waste material is produced in silicon chip of solar cell production process,
It is micro- useless that the silica flour belongs to solid difficult to deal with, processing and using silica flour waste material silicon resource can be made to be utilized effectively simultaneously
Realize the purpose of environmental protection.Silica flour waste material produced by silicon chip of solar cell manufacturing process belongs to no sulphur, phosphorus composition
Material, super-low sulfur, phosphorus or Antaciron without sulphur, phosphorus can be produced by producing ferrosilicon using silica flour waste material, can be Ferrous Metallurgy neck
Domain provides the Antaciron raw material of high-quality, can increase substantially the quality of steel products.
Current China turns into manufacture of solar cells big country, how to handle and utilize institute during manufacture of solar cells
The a large amount of silica flour waste materials produced, have become extremely important.Existing processing silica flour waste material has following several method：
1st, crystalline silicon cutting waste material prepares carborundum
China Patent No. 201110152492.2, publication date：On December 14th, 2011, patent discloses one kind silicon crystal and given up
Expect the method for nitridation reaction sintered silicon carbon, its method is carried out as follows：
The superfine silicon carbide micro powder produced during by crystalline silicon cutting waste material and production carborundum cutting powder, is accounted for according to free silica
After raw material total amount 5-25wt% dispensing mixed-formings, into raw material, green compact are made in addition binding agent, and purity is passed through in nitriding furnace
More than 99wt% high pure nitrogen simultaneously carries out nitrogen treatment to green compact heating, obtains the product of reactive sintering of silicon nitride carborundum.
But the invention can not carry out directly processing, it is necessary to carry out secondary operation, complex procedures to crystal scrap silicon.Finished product
For sintering silicon carbide products, not the characteristics of not giving full play to crystal scrap silicon low-sulfur, phosphorus.
2nd, the method that SiC particles reinforced silicon aluminum alloy composite is obtained in crystalline silicon cutting waste material
Chinese Patent Application No.：201310390694.X, publication date：On March 26th, 2014, disclose one kind crystalline silicon
The method that SiC particles reinforced silicon aluminum alloy composite is obtained in cutting waste material, is carried out as follows：First to crystalline substance
Body cutting waste material carries out pickling impurity removal, iron oxide, metal impurities and a small amount of silica etc. in cutting waste material is removed, through water
The step such as wash, filter, drying and obtaining particle size range in 0.5 μm -10 μm of carborundum and the admixed finepowder of silicon, by silicon carbide micro-powder
Composite gross mass percentage 0.2%-9.8% is pressed in composite total mass fraction 4.5-32.5% ratio, free silica
Matched with aluminum or aluminum alloy, using high temperature strong stirring to carborundum is dispersed and silica flour dissolving after, handled through rapid solidification
Obtain composite.
But carborundum, silica flour etc. are the waste materials in industrial production used in the invention, waste material is strictly make use of, but
It is that its obtained product is SiC particles reinforced Al alloy composite, the conjunction of SiC particles reinforced aluminium is not provided in text
The effect of metal/composite material, although provide an outlet to crystalline silicon cutting waste material, but do not given play to crystalline silicon and cut
Cut the low-phosphorous value at best of the low-sulfur of waste material.
3rd, using mine heat furnace smelting Antaciron
Silica flour waste material is that the originals such as coke powder, bath of glass and iron scale are incorporated in silica flour using mine heat furnace smelting Antaciron
Material is made ball material and is added to smelting duriron in mineral hot furnace, and the smelting process has following defect：
1), silica flour pellet forming process section adds production cost, without the characteristic for directly utilizing silicon powder particle；
2), the coke powder of supplying has brought the materials such as sulphur, phosphorus into, adds sulphur, phosphorus content in silicon iron product, reduces ferrosilicon
The quality of product；
3), Main Ingredients and Appearance is elemental silicon and carborundum in silica flour waste material.Silicon mainly melts during mine heat furnace smelting
Antaciron is combined into iron, in the absence of the reduction endothermic reaction, mineral hot furnace can be caused using mineral hot furnace method smelting ferrosilicon
Top temperature is high, and substantial amounts of heat is wasted in mineral hot furnace, it is impossible to effectively reduce production cost.
In summary, waste problems can be solved by one kind being lacked now, and the processing that can also play its own maximum feature is brilliant
The rational method of body silicon cutting waste material.
The content of the invention
1. the problem of solving
Crystalline silicon waste problems can be solved for existing shortage one kind, the processing that can also play its own maximum feature is brilliant
The problem of rational method of body silicon cutting waste material, the present invention provides a kind of method of utilization crystal scrap silicon smelting duriron, its
The process problem of crystal scrap silicon is not only solved, most crucial is the value for farthest having played crystal scrap silicon.
2. technical scheme
In order to solve the above problems, the technical solution adopted in the present invention is as follows：
A kind of method of utilization crystal scrap silicon smelting duriron, crystalline silicon cutting waste material is put into the molten iron of fusing and prepared
Ferrosilicon.
A kind of method of utilization crystal scrap silicon smelting duriron, its step is：
(A) by the steel scrap shove charge needed for smelting ferrosilicon, by the scrap melting in body of heater into molten iron, and molten iron is continued
It is heated to more than 1570 DEG C；
(B) silica flour waste material is continuously blown into molten iron, forms liquation, controlled and maintain to add liquation after silica flour waste material
Temperature is more than 1480 DEG C；
(C) it is blown into the liquid level of liquation after silica flour waste material to rise and fill behind body of heater middle part, continues to spray into the liquation of body of heater
Blow silica flour waste material, control and maintain the temperature of liquation more than 1330 DEG C, until Antaciron liquid reach needed for Antaciron mark
The liquid level of number product.
Preferably, in addition to step (D)：Antaciron liquid in stove is sent to vacuum decarburization device and carries out decarburization, is carried out
Composition is finally adjusted, and obtains qualified Antaciron liquid.
Preferably, the addition of steel scrap is constituted and to be prepared according to composition in silica flour waste material in described step (A)
The purity of ferrosilicon is determined.
Preferably, described injection is blown using protective gas.
Preferably, described protective gas injection load volume is 270~360Nm3/ h, silica flour waste material injection amount be 270~
450kg/min。
Preferably, the addition of steel scrap is constituted and to be prepared according to composition in silica flour waste material in described step (A)
The purity of ferrosilicon is determined.
Preferably, described steel scrap, which is added, is added after crushing.Silica flour waste material is directly blown by Gas injection mode
Add and generation Antaciron liquid is melted and combined with molten iron in molten iron, be the production under the conditions of a kind of addition without other auxiliary materials
The technique and method of Antaciron.
Embodiments of the invention are preferably as follows a kind of stove, a kind of intermediate frequency furnace, including body of heater, and body of heater is divided into active section and pre-
Section is stayed, the top that section is located at active section is reserved；Active section is divided into body of heater hypomere, body of heater stage casing and body of heater epimere three from bottom to top
Section；The diameter of described body of heater hypomere is less than the diameter of body of heater epimere；The longitudinal section in described body of heater stage casing is shaped as inside
Hollow reverse frustoconic, the diameter of body of heater stage casing lower end is equal to the diameter of body of heater hypomere；The diameter of body of heater stage casing upper end is equal to stove
The diameter of body epimere.
Preferably, in addition to nozzle and/or injection rifle, described nozzle is located under the side wall in body of heater stage casing and/or body of heater
On the bottom of section and/or the side wall of body of heater hypomere；Described injection rifle is inserted downwardly into body of heater hypomere by the top of body of heater
Bottom.Preferred scheme is that the bottom of body of heater hypomere has on 1 nozzle, the side wall in body of heater stage casing and the side wall of body of heater hypomere and has 1 to 6
Individual side-blown nozzle；Injection rifle has 1.
Preferably, described body of heater epimere is provided with Heat preservation coil；Described body of heater hypomere and body of heater stage casing, which are provided with, to be added
Heat coil；Described body of heater hypomere and the heating coil in body of heater stage casing are controlled by same circuit.
Preferably, the volume of described reserved section is more than or equal to the 3/10 of active section volume；The volume of body of heater hypomere accounts for stove
The 5%~40% of body running section, the height of body of heater hypomere is more than or equal to 600mm.
Preferably, described nozzle uses air brick.
Preferably, described Heat preservation coil is located at the bottom of body of heater epimere.
, silica flour waste material is directly blown by Gas injection mode generation ferrosilicon is melted and combined with molten iron in addition molten iron
Aluminium alloy, is the technique and method that produce Antaciron under the conditions of a kind of addition without other auxiliary materials.
In actual production, silica flour waste material composition and characteristic are：In silicon chip of solar cell cutting production process, due to using
Carborundum wire cutting technology, produces high-temperature oxydation effect in addition in cutting process so that the silica flour waste material after processing have it is following into
Part and characteristic：
Silica flour waste material composition：
Si：30~80%, SiO2：0~10%, SiC：5~40%, Fe：0~2%；
Silica flour waste granules degree：6.5 μm to 38 μm；
Silica flour waste material bulk density：1000~1400kg/m3。
The principle of the present invention is by two kinds of raw material Hybrid Heatings, due to respective characteristic, for being simply mixed
Some problems, the present invention also proposes solution accordingly, is specially：
1) silicon is non-permeable material, can not generate heat and melt self by magnetic field in intermediate frequency furnace, it is difficult to use electromagnetism
Heating；So the present invention using realized by the heat exchange with molten iron fusing and be combined into Antaciron with iron；
2) proportion (1000~1400kg/m of silica flour waste material3) it is much smaller than the proportion (7800kg/m of iron3), silica flour waste material is straight
Connecing in addition molten iron can be layered with molten iron, it is impossible to realize the heat exchange with molten iron and melt and be combined into Antaciron with iron；
3) ratio in Antaciron shared by silicon is too high, and the total amount of molten iron is unable to reach silica flour and given up in traditional intermediate frequency furnace
Expect the molten iron total amount required for injection, be that this present invention realizes the molten iron that silica flour waste material is blown required for smelting using the special type of furnace
Total amount.
The present invention is mainly widely used in metal smelt in view of ferrosilicon, be important deoxidier in steelmaking process it
One, it is one of important reducing agent in light metal smelting industry, is the indispensable raw material of metallurgical industry.Meanwhile, ferrosilicon can also be made
For alloying element addition agent, it is widely used among low-alloy structural steel, spring steel, bearing steel, heat resisting steel and electrical steel, silicon
Iron is commonly used for reducing agent in ferroalloy production and chemical industry.Because it belongs to high energy consumption product, so ferrosilicon in the whole world
The production overwhelming majority be, in developing country and low developed area progress, and to have filling for electric power, coal and mineral resources
Divide supply bond.
Silica is one of most mineral resources of nature reserves, is also a kind of ore for being most difficult to reduction in the world.It is necessary
It could realize under the high temperature conditions, its reduction temperature is higher at ambient pressure, it is anti-that with carbon chemistry could occur for the oxygen in such silica
Should, the carbon monoxide of generation overflows burning, and combination reaction generation Antaciron could occur with iron for silicon.But existing ferrosilicon
In smelting process, all containing impurity such as substantial amounts of S, P, want to remove S, P, it is necessary to spend substantial amounts of man power and material, and precision
It is not high.
And the present invention is recycled to solar panel crystal scrap silicon, landfill pollution is reduced, can not only be solved
The landfill pollution problem of solar panel crystal scrap silicon, additionally it is possible to make it as raw material and produce ferrosilicon, so as to obtain objective
Economic benefit, emphasis is to obtain the ferrosilicon without S, P.
3. beneficial effect
Compared to prior art, beneficial effects of the present invention are：
(1) present invention utilizes crystal scrap silicon smelting duriron, and heating effect is good, and efficiency high, power consumption is low；It is useless using crystalline silicon
In the method for expecting smelting duriron, when carrying out ferrosilicon smelting using solar panel crystal scrap silicon, raw material is main first
It is the silicon and carborundum and a small amount of silica of high-purity, and the smelting process of crystalline silicon ensures that it does not contain S, P, or
Even if saying, content is also extremely low；The present invention reduces silica using the carbon in carborundum simultaneously, therefore does not need volume
Outer addition coke, so reduce the consumption of the energy, and due to that need not add coke, reduces P elements and element sulphur
Influence, product ferrosilicon is low-phosphorous, low-sulfur, low-carbon and ferrosilicon, and value is high；Emphasis is due to not contain P elements and sulphur in raw material
Also without P elements and element sulphur in element, production process, without worrying p and ses impurity in its ferrosilicon produced, it is without phosphorus and
Sulphur impurity, purity is high；
(2) method of the invention can reduce the discharge of solar cell board waste material, one action two while ferrosilicon is produced
, resource consumption is reduced, production technology uses injection method, shortens the technological process of smelting ferrosilicon；
(3) production process of the present invention is simple, reasonable in design, it is easy to accomplish.
Brief description of the drawings
Fig. 1 is the structural representation for the intermediate frequency furnace that the embodiment of the present invention is used；
Fig. 2 is the schematic diagram in the embodiments of the invention 1 in embodiment 1 using intermediate frequency furnace；
Fig. 3 is the schematic diagram in the embodiments of the invention 1 in embodiment 2 using intermediate frequency furnace.
In figure：1st, body of heater hypomere；2nd, body of heater stage casing；3rd, body of heater epimere；4th, nozzle；5th, it is blown rifle.
Embodiment
The present invention is further described below with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2 and Figure 3, using such as lower furnace body, a kind of intermediate frequency furnace, including body of heater, body of heater be divided into active section and
Reserved section, reserves the top that section is located at active section；The volume of reserved section is more than or equal to the 3/10 of active section volume；Active section is under
And on be divided into 3 three sections of body of heater hypomere 1, body of heater stage casing 2 and body of heater epimere；The diameter of described body of heater hypomere 1 is less than body of heater epimere 3
Diameter；The reverse frustoconic for being shaped as inner hollow of the longitudinal section in described body of heater stage casing 2, the diameter of the lower end of body of heater stage casing 2
Equal to the diameter of body of heater hypomere 1；The diameter of the upper end of body of heater stage casing 2 is equal to the diameter of body of heater epimere 3.Also include nozzle 4 and/or spray
Rifle 5 is blown, nozzle 4 uses air brick.Described nozzle 4 be located at body of heater stage casing 2 side wall and/or body of heater hypomere 1 bottom and/or
On the side wall of body of heater hypomere 1；Described injection rifle 5 is inserted downwardly into the bottom of body of heater hypomere 1 by the top of body of heater.On body of heater
Section 3 is provided with Heat preservation coil；Described body of heater hypomere 1 and body of heater stage casing 2 are provided with heating coil.The insulation of body of heater epimere 3 adds
Heat coil works independently；Described body of heater hypomere 1 and the heating coil in body of heater stage casing 2 are controlled by same circuit.Heat preservation line
Circle is positioned at the bottom of body of heater epimere 3.The volume of body of heater hypomere 1 accounts for the 5%~40% of body of heater active section, the height of body of heater hypomere 1
More than or equal to 600mm.
A kind of method of utilization crystal scrap silicon smelting duriron, its step is：
(A) by the steel scrap shove charge needed for smelting ferrosilicon, the addition of steel scrap according to composition composition in silica flour waste material and
The purity of ferrosilicon to be prepared is determined；Body of heater hypomere 1 and the heating coil energization work of body of heater stage casing 2 are by scrap melting Cheng Tie
Water, and molten iron continued to be heated to more than 1570 DEG C；
(B) silica flour waste material is continuously blown into molten iron by the nozzle 4 and/or injection rifle 5 of body of heater hypomere 1, forms molten
Liquid, adjusts the power of heating coil, controls and maintains the temperature for adding liquation after silica flour waste material more than 1480 DEG C；Injection is used
Nitrogen injection, nitrogen-blow load volume is 270~360Nm3/ h, silica flour waste material injection amount is 270~450kg/min, similarly hereinafter；
(C) it is blown into the liquid level of liquation after silica flour waste material to rise and fill behind body of heater stage casing 2, passes through the nozzle 4 in body of heater stage casing 2
Be blown silica flour waste material, the Heat preservation coil of body of heater epimere 3 is started working, control and maintain the temperature of liquation at 1480 DEG C extremely
In the range of 1520 DEG C；Continuous injection silica flour waste material, controls and maintains the temperature of liquation more than 1330 DEG C, until Antaciron liquid
The liquid level of Antaciron label product needed for reaching.The standard of Antaciron now can be reached, but partial picture may
There can be the problem of carbon content is too high, now for such case, only the Antaciron liquid in intermediate frequency furnace need to be sent to vacuum and taken off
Carbon device carries out decarburization, and according to carbon containing difference, selection addition iron scale carries out composition and finally adjusted, generates qualified silicon
Ferroalloy liquid, smelting process terminates.Vacuum decarburization uses common decarbonization process, and those skilled in the art can realize,
Place will not be repeated here.
The present invention is mainly based upon the mechanism of the following aspects to realize：The fusing point and proportion of silicon, iron and ferrosilicon：
Fe：1538 DEG C of fusing point, proportion 7800kg/m3
Si：1414 DEG C of fusing point, proportion 2300kg/m3
Fe-Si：1300 DEG C of fusing point, proportion 3300kg/m3
Silicon powder particle is blown into molten iron or Antaciron liquid in silica flour waste material, in the presence of difference in specific gravity, silica flour
Grain can float.Silicon powder particle carried out in uphill process with molten iron or Antaciron liquid sufficient thermodynamics and kineticses exchange and
Fusing, forms Antaciron and steps up concentration of the silicon in Antaciron liquid.Being continuously added and melt, ferrosilicon with silicon
Silicone content in alloy gradually rises and is finally reached required Antaciron product.The concentration of silicon is progressively carried in Antaciron
It is high so that the fusing point of Antaciron progressively declines and changed.
Reaction mechanism is melted present invention utilizes carborundum
Carborundum melts
Carborundum fusing point is 2700 DEG C, proportion 3200kg/m3.Silicon-carbide particle is blown into molten iron or silicon in silica flour waste material
In ferroalloy liquid, floated in the presence of difference in specific gravity.Silicon-carbide particle is carried out in floating-upward process with molten iron or Antaciron liquid
Sufficient thermodynamics and kineticses are exchanged so that carbon is combined with iron and is liquefied carborundum, and silicon enters with molten iron or Antaciron liquid
One step combines to form Antaciron liquid.
Reactional equation：SiC+Fe——→SiFe+C
Silicon dioxde reaction mechanism
1650 DEG C of silica melting point, proportion 2200kg/m3.In silica flour waste material silica dioxide granule be blown into molten iron or
In Antaciron liquid, silica dioxide granule floats in the presence of difference in specific gravity, enters in floating-upward process with molten iron or Antaciron liquid
The sufficient thermodynamics and kineticses of row are exchanged, and it is anti-that with the carbon that molten iron or Antaciron liquid are rushed chemistry occurs for part of silica particle
Should so that silica is reduced into silicon.Chemical reaction is as follows：
C+SiO2——→SiO+CO↑
Injection stirring and electromagnetic agitation mechanism
(1) injection stirring
Carrier gas is blown in molten iron or Antaciron liquid is blown into, is expanded under the heating of molten iron or Antaciron liquid,
The gas of expansion carries out sufficiently stirring to molten iron or Antaciron liquid and causes the silica flour waste material sprayed into molten iron or Antaciron
It is evenly distributed in liquid, further promotes silica flour waste granules and exchanged in molten iron or Antaciron liquid thermodynamics and kineticses,
Various reactions of the silica flour waste material in molten iron or Antaciron liquid are accelerated, the time of smelting is shortened.
(2) electromagnetic agitation
Molten iron or Antaciron liquid form Stirring in the presence of intermediate frequency furnace electromagnetic force, and stirring promotes silica flour waste material
Being uniformly distributed in molten iron or Antaciron liquid, strengthen silica flour waste granules in molten iron or Antaciron liquid thermodynamics and
Kinetic exchange, accelerates various reactions of the silica flour waste material in molten iron or Antaciron liquid, shortens the time of smelting duriron.
(3) vacuum decarburization mechanism
During carborundum melts, a certain amount of C element is produced sometimes, it is impossible to discharge.Simultaneously in condition of normal pressure
Under, the SiO that silica is produced during melting is dissolved in Antaciron liquid, it is impossible to continue to react generation Si and CO.Cause
This is after Antaciron liquid is come out of the stove by vacuum decarburization device, you can SiO can be removed by reacting balanced sequence, if still containing
There is C element, add appropriate iron scale, reach the purpose of removing C element, produce qualified ferrosilicon.
Vacuum decarburization reaction equation is as follows：
C+SiO——→Si+CO↑
Fe-C+Fe3O4——→FeO+CO↑
Fe-C+FeO——→Fe+CO↑
The present invention is explained further with reference to specific embodiment.
Embodiment 1
As shown in Fig. 2 a kind of intermediate frequency furnace, including body of heater, body of heater is divided into body of heater hypomere 1, body of heater stage casing 2 and stove from bottom to top
3 three sections of body epimere；A diameter of 764mm of body of heater hypomere 1, be highly 700mm, and the longitudinal section in body of heater stage casing 2 is shaped as inside
Hollow reverse frustoconic, the diameter of the lower end of body of heater stage casing 2 is equal to the diameter of body of heater hypomere 1；The height in body of heater stage casing 2 is 700mm,
The angle of side and horizontal plane is 60 °, and the height of body of heater epimere 3 is 1462mm, and the diameter of the upper end of body of heater stage casing 2 is equal on body of heater
The diameter of section 3, the intermediate frequency furnace is 10 tons of ferrosilicon intermediate frequency furnaces.The sidewall bottom in body of heater stage casing 2 is provided with 2 nozzles 4, body of heater hypomere
1 bottom uses air brick provided with a nozzle 4, nozzle 4；Body of heater epimere 3 is provided with Heat preservation coil；Body of heater hypomere 1 and stove
Body stage casing 2 is provided with heating coil.The Heat preservation coil of body of heater epimere 3 works independently；Body of heater hypomere 1 and body of heater stage casing 2 plus
Heat coil is controlled by same circuit.Heat preservation coil is located at the bottom of body of heater epimere 3.
In use, its step is：
(A) by the 2500kg low-carbon waste steel shove charges needed for smelting ferrosilicon, body of heater hypomere 1 and the heater wire of body of heater stage casing 2
Energization work is enclosed by scrap melting into molten iron, and molten iron continued to be heated in the range of 1570 DEG C to 1610 DEG C；Silica flour waste material
Composition is：Si：72%th, Si-C：16%th, Fe：2%, remaining is SiO2, granularity：6.5μm-10μm；
(B) silica flour waste material is continuously blown into molten iron by the nozzle 4 of body of heater hypomere 1, forms liquation, adjust heater wire
The power of circle, controls and maintains the temperature for adding liquation after silica flour waste material in the range of 1480 DEG C to 1520 DEG C；Injection uses nitrogen
Gas blowout is blown, and nitrogen-blow load volume is 300Nm3/ h, silica flour waste material injection amount is 300kg/min；
(C) it is blown into the liquid level of liquation after silica flour waste material to rise and fill behind body of heater stage casing 2, passes through the nozzle 4 in body of heater stage casing 2
Silica flour waste material is blown, the Heat preservation coil of body of heater epimere 3 is started working, continuous injection silica flour waste material is finally controlled and maintained
The temperature of liquation is in the range of 1330 DEG C to 1370 DEG C, until Antaciron liquid is full of body of heater active section.
(E) Antaciron liquid is sent into vacuum decarburization device, regulation vacuum to -5, while adding iron scale
252.4kg, produces qualified Antaciron liquid, and smelting process terminates.
Come out of the stove Antaciron amount：10283kg, silicon content 72.9%.
Embodiment 2
As shown in figure 3, a kind of intermediate frequency furnace, be the same as Example 1, under the height for not being both body of heater hypomere 1 is 600mm, body of heater
The volume of section 1 accounts for the 40% of body of heater active section；Also include injection rifle 5, charging is upper by body of heater by being blown rifle 5, injection rifle 5
Portion is inserted downwardly into the bottom of body of heater hypomere 1.Using the injection addition silica flour waste material of rifle 5.
(A) by the 2500kg low-carbon waste steel shove charges needed for smelting ferrosilicon, body of heater hypomere 1 and the heater wire of body of heater stage casing 2
Energization work is enclosed by scrap melting into molten iron, and molten iron continued to be heated in the range of 1590 DEG C to 1630 DEG C；Silica flour waste material
Composition is：Si：72%th, Si-C：16%th, Fe：2%, remaining is SiO2, granularity：6.5μm-10μm；
(B) silica flour waste material is continuously blown into molten iron by the nozzle 4 of body of heater hypomere 1, forms liquation, adjust heater wire
The power of circle, controls and maintains the temperature for adding liquation after silica flour waste material in the range of 1450 DEG C to 1560 DEG C；Injection uses nitrogen
Gas blowout is blown, and nitrogen-blow load volume is 350Nm3/ h, silica flour waste material injection amount is 390kg/min；
(C) it is blown into the liquid level of liquation after silica flour waste material to rise and fill behind body of heater stage casing 2, passes through the nozzle 4 in body of heater stage casing 2
Silica flour waste material is blown, the Heat preservation coil of body of heater epimere 3 is started working, continuous injection silica flour waste material is finally controlled and maintained
The temperature of liquation is in the range of 1340 DEG C to 1360 DEG C, until Antaciron liquid is full of body of heater active section.
(E) Antaciron liquid is sent into vacuum decarburization device, regulation vacuum to -5, while adding iron scale
252.4kg, produces qualified Antaciron liquid, and smelting process terminates.
Come out of the stove Antaciron amount：10283kg, silicon content 72.9%.
Embodiment 3
As shown in Fig. 2 a kind of intermediate frequency furnace, including body of heater, body of heater is divided into body of heater hypomere 1, body of heater stage casing 2 and stove from bottom to top
3 three sections of body epimere；A diameter of 874mm of body of heater hypomere 1, be highly 800mm, and the longitudinal section in body of heater stage casing 2 is shaped as inside
Hollow reverse frustoconic, the diameter of the lower end of body of heater stage casing 2 is equal to the diameter of body of heater hypomere 1；The height in body of heater stage casing 2 is 700mm,
The angle of side and horizontal plane is 60 °, and the height of body of heater epimere 3 is 2024mm, and the diameter of the upper end of body of heater stage casing 2 is equal on body of heater
The diameter of section 3, the intermediate frequency furnace is 15 tons of ferrosilicon intermediate frequency furnaces.The sidewall bottom in body of heater stage casing 2 is provided with 2 nozzles 4, body of heater hypomere
1 bottom uses air brick provided with a nozzle 4, nozzle 4；Body of heater epimere 3 is provided with Heat preservation coil；Body of heater hypomere 1 and stove
Body stage casing 2 is provided with heating coil.The Heat preservation coil of body of heater epimere 3 works independently；Body of heater hypomere 1 and body of heater stage casing 2 plus
Heat coil is controlled by same circuit.Heat preservation coil is located at the bottom of body of heater epimere 3.
In use, its step is：
(A) by the 3750kg low-carbon waste steel shove charges needed for smelting ferrosilicon, body of heater hypomere 1 and the heater wire of body of heater stage casing 2
Energization work is enclosed by scrap melting into molten iron, and molten iron continued to be heated in the range of 1570 DEG C to 1600 DEG C；Silica flour waste material
Composition is：Si：72%th, Si-C：16%th, Fe：2%, remaining is SiO2, granularity：10μm-38μm；
(B) silica flour waste material is continuously blown into molten iron by the nozzle 4 of body of heater hypomere 1, forms liquation, adjust heater wire
The power of circle, controls and maintains the temperature for adding liquation after silica flour waste material in the range of 1480 DEG C to 1510 DEG C；Injection uses nitrogen
Gas blowout is blown, and nitrogen-blow load volume is 300Nm3/ h, silica flour waste material injection amount is 300kg/min；
(C) it is blown into the liquid level of liquation after silica flour waste material to rise and fill behind body of heater stage casing 2, passes through the nozzle 4 in body of heater stage casing 2
Be blown silica flour waste material, the Heat preservation coil of body of heater epimere 3 is started working, control and maintain the temperature of liquation at 1480 DEG C extremely
In the range of 1510 DEG C；
(D) continuous injection silica flour waste material, finally controls and maintains the temperature of liquation in the range of 1350 DEG C to 1400 DEG C, directly
Body of heater active section is full of to Antaciron liquid.
(E) Antaciron liquid is sent into vacuum decarburization device, regulation vacuum to -5, while adding iron scale
378.6kg, produces qualified Antaciron liquid, and smelting process terminates.
Come out of the stove Antaciron amount：15424kg, silicon content 73%.
Schematical above that the present invention and embodiments thereof are described, those of ordinary skill in the art are according to this Shen
Description that please be in file and accompanying drawing, the operation principle of the present invention can have been known and can completely realize technical scheme with
And the effect of the invention to be reached is reached, so repeating no more；The schematic description does not have restricted, shown in accompanying drawing
Simply one of embodiments of the present invention, actual structures and methods are not limited thereto, for example, can use common intermediate frequency stove
Directly heat, but so silicone content is relatively low, it is necessary to first refine a stove, then pours out half to another stove, silicon is then added again
Powder, program is complicated, is directly smelted in other words using vacuum drying oven or is blown the vacuum decarburization of charging smelting+below, these are also all
Can according to the present invention file principle, the technical scheme that those skilled in the art can naturally expect and easily realize, institute
With if one of ordinary skill in the art is enlightened by it, without departing from the spirit of the invention, without creativeness
Design the frame mode same or similar with the technical scheme and embodiment, the legislative spirit based on Patent Law all should
Belong to protection scope of the present invention.
Claims (7)
1. a kind of method of utilization crystal scrap silicon smelting duriron, its step is：
(A) by the steel scrap shove charge needed for smelting ferrosilicon, by the scrap melting in body of heater into molten iron, and molten iron is continued into heating
To more than 1570 DEG C；
(B) silica flour waste material is continuously blown into molten iron, forms liquation, controlled and maintain to add the temperature of liquation after silica flour waste material
More than 1480 DEG C；
(C) it is blown into the liquid level of liquation after silica flour waste material to rise and fill behind body of heater middle part, continues to be blown silicon into the liquation of body of heater
Powder waste material, controls and maintains the temperature of liquation more than 1330 DEG C, until Antaciron liquid reach needed for the production of Antaciron label
The liquid level of product.
2. the method for a kind of utilization crystal scrap silicon smelting duriron according to claim 1, it is characterised in that also including step
Suddenly (D)：Antaciron liquid in stove is sent to vacuum decarburization device and carries out decarburization, composition is carried out and finally adjusts, obtain qualified
Antaciron liquid.
3. a kind of method of utilization crystal scrap silicon smelting duriron according to claim 1, it is characterised in that described step
Suddenly the addition of steel scrap is determined according to the purity of composition composition and ferrosilicon to be prepared in silica flour waste material in (A).
4. a kind of method of utilization crystal scrap silicon smelting duriron according to claim 2, it is characterised in that described spray
Blow using protective gas injection.
5. a kind of method of utilization crystal scrap silicon smelting duriron according to claim 4, it is characterised in that described guarantor
It is 270~360Nm to protect Gas injection load volume3/ h, silica flour waste material injection amount is 270~450kg/min.
6. a kind of method of utilization crystal scrap silicon smelting duriron according to claim 1, it is characterised in that described step
Suddenly the addition of steel scrap is determined according to the purity of composition composition and ferrosilicon to be prepared in silica flour waste material in (A).
7. the method for a kind of utilization crystal scrap silicon smelting duriron according to claim 1, it is characterised in that described is useless
Steel, which is added, to be added after crushing.
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| CN201410788395.6A CN104482761A (en) | 2014-12-17 | 2014-12-17 | Intermediate frequency furnace, application thereof, and method for smelting silicon iron by utilizing crystalline silicon scraps |
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| CN104726738A (en) * | 2015-04-08 | 2015-06-24 | 王先玉 | Crystalline silicon waste treatment method |
| CN105177290A (en) * | 2015-07-27 | 2015-12-23 | 马君瑞 | Technology for smelting medium and low carbon ferrochromium via one-step method through polycrystalline silicon waste materials |
| CN105112664A (en) * | 2015-09-22 | 2015-12-02 | 刘来宝 | Method for producing silicon-calcium alloy from cut waste in photovoltaic industry |
| CN105543515B (en) * | 2015-12-11 | 2017-08-29 | 宁夏维尔铸造有限责任公司 | Utilize the method for intermediate frequency furnace melting ferrochrome |
| CN105567968A (en) * | 2016-02-01 | 2016-05-11 | 四川川投峨眉铁合金（集团）有限责任公司 | Production method for smelting ferrosilicon by utilizing crystalline silicon cutting waste powder |
| CN105567967A (en) * | 2016-02-01 | 2016-05-11 | 四川川投峨眉铁合金（集团）有限责任公司 | Production method for smelting manganese-series iron alloys by utilizing crystalline silicon cutting waste powder as reducing agent |
| CN110078082A (en) * | 2019-05-06 | 2019-08-02 | 新疆泰宇达环保科技有限公司 | A method of silicon slag is recycled with intermediate frequency furnace |
| CN111411187A (en) * | 2020-05-18 | 2020-07-14 | 三祥新材股份有限公司 | Magnesium-silicon-iron alloy nodulizer and preparation method thereof |
| CN115029555B (en) * | 2022-06-14 | 2023-12-29 | 石嘴山市宝马兴庆特种合金有限公司 | Method for preparing ultralow-carbon silicon-based multi-element alloy by utilizing industrial solid waste production |
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| DE3026721C2 (en) * | 1980-07-15 | 1982-11-11 | Leybold-Heraeus GmbH, 5000 Köln | Closed induction melting and casting furnace with exchangeable crucible |
| JP2001108795A (en) * | 1999-10-04 | 2001-04-20 | Mitsubishi Heavy Ind Ltd | Melting furnace |
| RU2213792C1 (en) * | 2002-04-19 | 2003-10-10 | Бурлов Юрий Александрович | Plasma-type reactor-separator |
| JP2005055017A (en) * | 2003-08-08 | 2005-03-03 | Daido Steel Co Ltd | Molten metal tapping device |
| JP4689373B2 (en) * | 2005-07-04 | 2011-05-25 | シャープ株式会社 | How to reuse silicon |
| CN2920486Y (en) * | 2006-03-23 | 2007-07-11 | 北京有色金属研究总院 | Device for continuous preparing metal sizing agent by forced uniform condensation |
| CN201258352Y (en) * | 2008-07-07 | 2009-06-17 | 河北上大再生资源科技有限公司 | Sensing smelting furnace of nickel renewable resource intermediate alloy |
| CN201397039Y (en) * | 2009-01-14 | 2010-02-03 | 贵州贵航能发装备制造有限公司 | Cold crucible with weld cooling pipeline for vacuum induction melting |
| CN201728368U (en) * | 2010-05-13 | 2011-02-02 | 洛阳八佳电气科技股份有限公司 | Jet pouring rapid hardening device |
| CN102211769A (en) * | 2011-04-22 | 2011-10-12 | 尹克胜 | Novel method for comprehensively treating waste mortar formed by processing photovoltaic cell crystalline silicon |
| CN102534203A (en) * | 2011-12-31 | 2012-07-04 | 上海盛宝冶金科技有限公司 | Photovoltaic silicon alloy ball and production method thereof |
| CN204329598U (en) * | 2014-12-17 | 2015-05-13 | 王先玉 | A kind of intermediate frequency furnace |
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