CN105603291A - Production method for smelting silicochrome by recycling crystalline silicon cut waste powder - Google Patents
Production method for smelting silicochrome by recycling crystalline silicon cut waste powder Download PDFInfo
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- CN105603291A CN105603291A CN201610068423.6A CN201610068423A CN105603291A CN 105603291 A CN105603291 A CN 105603291A CN 201610068423 A CN201610068423 A CN 201610068423A CN 105603291 A CN105603291 A CN 105603291A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The invention discloses a production method for smelting silicochrome by recycling crystalline silicon cut waste powder. According to the production method, cutting mortar waste powder abandoned from the solar photovoltaic crystalline silicon chips is directly distributed into a chrome ore raw material or high-carbon ferro-chrome raw material completely or partially instead of coke or silica, smelting operation is carried out by adopting existing equipment according to the silicochrome required operation instruction, and oxide of chromium and iron or silicon dioxide in a silica ingredient is reduced to prepare a silicochrome product under a high-temperature melting state by utilizing the high energy-carrying and strong reducing characteristics of high-purity monatomic silicon and silicon carbide in the cutting mortar waste powder. Trial application indicates that the production method indeed has the prominent advantages of simple and easily-mastered process technique, silicon resource recycling, good energy-saving and consumption-reducing effect, can be used for solving the problem of environmental pollution of mortar waste powder in the chip industry and further reducing the production cost of silicochrome, and has a good application prospect in the metallurgical industry and solar new energy industry.
Description
Technical field
The present invention relates to the useless powder of high efficiente callback crystalline silicon cutting and carry out technology innoxious, comprehensive utilization of resources, toolSay a kind of production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, it is capable that it belongs to photovoltaic bodyThe technical field of industry environment protection treating and metallurgy industry energy-saving and emission-reduction comprehensive utilization of resources engineering.
Background technology
Continue to optimize in adjustment process at global performance source structure, the photovoltaic of the green clean energy resource characteristic of tool producesIndustry receives much attention and is developed rapidly, and at present, photovoltaic industry (comprises polysilicon and monocrystalline to crystalline silicon productSilicon) quantity required day by day increase, objectively effectively promoted China crystalline silicon section industry constantly to expand the scale of production alsoImprove cutting technique level. What in existing crystalline silicon section industry, generally adopt is " line cutting " new technology of cutting into slices, it be byMachine guide wheel drives wire to run up the sand of the cutting liquid taking polyethylene glycol as Main Ingredients and Appearance and silicon carbide micro-powder mixingSlurry is delivered to cutting area crystalline silicon ingot has been cut to section operation. To be objective, this Novel cutting chip technology is to improvingThe yield rate of wafer has certain effect, still, still has a large amount of Si powder and (account for crystalline silicon ingot weight in cutting operation processAmount 20%-40%) fall in cutting liquid, after Si powder quantity increases gradually, will affect cutting performance and become siliceous sandSlurry waste material is dumped, and this mortar waste material can cause huge pollution to ecological environment. According to detection: the cutting mortar waste material dumpingIn containing have an appointment 30% high purity elemental silicon, approximately 35% carborundum, approximately 20% polyethylene glycol and water and a small amount of ferriferous oxide.It is all arbitrarily to stack and discarded in week for a long time that section enterprise extracts remaining a large amount of tail powders after polyethylene glycol to mortar waste materialPlace, limit, " the powder mound design " that a large amount of tail powders is constantly piled up formation become the dust pollution source of serious threat Environmental security,Classified as the high-risk points of contamination of emphasis monitoring by local environmental administration. Analyze according to detecting: in tail powder, be mainly Si powder waste materialWith the ferriferous oxide mixture that partially carbonized silicon and wire consume, it is taking HIGH-PURITY SILICON and carborundum as main component and hasThe silicon resource of high energy, strong reduction characteristic. And this tail powder is one for metallurgy industry is smelted production silicochromiumPlant huge silicon resource raw material treasure-house, we know, in existing pyrometallurgical smelting silicochromium technique, no matter are to adopt chrome ore to beIt is the two step method of raw material that the one-step method of raw material still adopts high carbon ferro-chrome, it be all taking coke as reducing agent to the chromium in raw material andThe oxide of iron carries out reduction reaction; Or obtain elemental silicon with the silica in coke reduction silica, simultaneously with silica and heightAfter carbon reaction carbon elimination in carbon ferrochrome, finally make silicochromium product. How scale ground high efficiente callback utilization in enormous quantities is cut into slicesDoes is is industry piled up silicon resource in discarded tail powder and used as the raw material of smelting Si evanohm? this cuts into slices to thorough solution crystalline siliconIndustry tail powder is stacked pollution problem and metallurgy industry energy-saving and emission-reduction is reduced to silicochromium production cost and all has significant societyMeeting environmental protection effect and great economic benefit, this is a technical task to be solved by this invention just.
Summary of the invention
Object of the present invention is intended to propose a kind of producer of recycling the useless powder smelting Si evanohm of crystalline silicon cuttingMethod, it can effectively solve crystalline silicon section industry and stack because a large amount of tail powders overstock the problem of environmental pollution causing, and can be again smeltingRefining silicochromium has been developed a huge silicon resource raw material treasure-house and has been explored the new producer of a smelting Si evanohmMethod.
The object of the invention is by the skill of " with the useless powder substitute for coke one-step method reducing chrome ore raw material of crystalline silicon cutting "Art scheme realizes:
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, is characterized in that: it successively by withLower step is carried out,
1. batching: take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.35-0.90 part of the useless powder of crystalline silicon cutting.
Above-mentioned " chrome ore raw material " refers to and meets smelting Si evanohm technique to enter one or more chrome ores of stove technical indicator mixedCompound;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
2. entering stove smelts: in the material input ferroalloy smelting mineral hot furnace that metering takes by weight ratio, by smeltingThe operational procedure that silicochromium requires is smelted operation.
3. the casting of tapping a blast furnace: remove after slag operation smelting qualified Molten Ferroalloys, molten iron is cast in to ingot mouldIn, carry out after cooling finishing operation removal and carry slag secretly, can make silicochromium product.
For realizing better object of the present invention, in the step of " batching ", it is the weight portion by following optimizationProportioning metering takes material:
1 part of chrome ore raw material,
0.65-0.85 part of the useless powder of crystalline silicon cutting.
Furthermore,, in the step of " batching ", it is the weight portion proportioning by following further optimizationAmount takes material:
1 part of chrome ore raw material,
0.75 part of the useless powder of crystalline silicon cutting.
Object of the present invention also can be by " former with the useless powder part substitute for coke one-step method reducing chrome ore of crystalline silicon cuttingMaterial " technical scheme realize:
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, is characterized in that: it successively by withLower step is carried out,
1. batching: take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.35-0.90 part of the useless powder of crystalline silicon cutting,
0.05-0.40 part, coke,
0.05-0.30 part, silica.
Above-mentioned " chrome ore raw material " refers to and meets smelting Si evanohm technique to enter one or more chrome ores of stove technical indicator mixedCompound;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
2. entering stove smelts: in the material input ferroalloy smelting stove that metering takes by weight ratio, by smelting silicochromiumThe operational procedure that alloy requires is smelted operation.
3. the casting of tapping a blast furnace: remove after slag operation smelting qualified Molten Ferroalloys, molten iron is cast in to ingot mouldIn, carry out after cooling finishing operation removal and carry slag secretly, can make silicochromium product.
For realizing better object of the present invention, in the step of " batching ", it is the weight portion by following optimizationProportioning metering takes material:
1 part of chrome ore raw material,
0.45-0.55 part of the useless powder of crystalline silicon cutting,
0.10-0.30 part, coke,
0.05-0.20 part, silica.
Furthermore,, in the step of " batching ", it is the weight portion proportioning by following further optimizationAmount takes material:
1 part of chrome ore raw material,
0.50 part of the useless powder of crystalline silicon cutting,
0.20 part, coke,
0.10 part, silica.
Object of the present invention can also be passed through " with the useless powder part substitute for coke two step method reduction of crystalline silicon cutting high carbon chromiumIron " technical scheme realize:
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, is characterized in that: it successively by withLower step is carried out,
1. batching: take material by the metering of following weight parts proportioning,
1 part of high carbon ferro-chrome raw material,
0.30-1.30 parts of the useless powders of crystalline silicon cutting,
0.10-0.80 part, coke,
0.50-1.80 parts, silica,
0.02-0.15 part of steel cuttings,
Above-mentioned " high carbon ferro-chrome raw material " refers to one or more high carbon chromiums that meet smelting Si evanohm technique and enter stove technical indicatorThe mixture of iron;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
2. entering stove smelts: in the material input ferroalloy smelting stove that metering takes by weight ratio, by smelting silicochromiumThe operational procedure that alloy requires is smelted operation.
3. the casting of tapping a blast furnace: remove after slag operation smelting qualified Molten Ferroalloys, molten iron is cast in to ingot mouldIn, carry out after cooling finishing operation removal and carry slag secretly, can make silicochromium product.
For realizing better object of the present invention, in the step of " batching ", it is the weight portion by following optimizationProportioning metering takes material:
1 part of high carbon ferro-chrome raw material,
0.50-0.90 part of the useless powder of crystalline silicon cutting,
0.30-0.60 part, coke,
0.50-1.50 parts, silica,
0.05-0.10 part of steel cuttings.
Furthermore,, in the step of " batching ", it is the weight portion proportioning by following further optimizationAmount takes material:
1 part of high carbon ferro-chrome raw material,
0.70 part of the useless powder of crystalline silicon cutting,
0.40 part, coke,
1.00 parts, silica,
0.08 part of steel cuttings.
In order to realize better object of the present invention, between " batching " and " entering stove smelts ", also have " powder pressure ball "Step, described " powder pressure ball " is that the useless powder of crystalline silicon cutting that metering is taken is put into mixer, cuts by crystalline siliconCut 5%-15% of useless powder weight and take cement and put into mixer, then add by crystalline silicon cutting 6%-10% of the powder weight of giving upAfter water, stir operation and make compound; Compound is sent in powerful ball press and suppressed pelletizing operation, make ballShape material, the diameter of controlling spherical material is 10-40mm.
The relevant technologies theoretical foundation that realizes the object of the invention is as follows:
Existing pyrometallurgical smelting silicochromium conventional process has the one-step method that employing chrome ore is raw material and adopts high carbon ferro-chrome is raw materialTwo step method, its general principle is: under electric energy effect, chrome ore or high-carbon chrome iron for smelting are become to high temperature fused state, taking coke asReducing agent carries out reduction reaction to the oxide of the chromium in raw material and iron and makes silicochromium product; Or taking coke as reducing agent pairSilica in chromium in chrome ore and the oxide of iron and silica batching carries out reduction reaction and makes silicochromium product; AlsoCan coke silica in reduction silica obtain elemental silicon, meanwhile, react carbon elimination with silica with the carbon in high carbon ferro-chrome,Obtain eventually silicochromium product. The present invention is exactly that silicochromium closes according to the high purity elemental silicon itself in the useless powder of crystalline silicon cutting justSilicon components in gold, meanwhile, also utilizes the carborundum in the useless powder of crystalline silicon cutting with the strong reduction characteristic of high energy storage as going backFormer dose of raw material, directly joins the useless crystalline silicon cutting all or part of substitute for coke of powder, silica to be assigned in chrome ore raw material or high-carbonIn ferrochrome raw material, enter stove and smelt operation, under high temperature fused state: the high purity elemental silicon in the useless powder of crystalline silicon cutting canDirectly fusing enters in silicochromium component; By carborundum carry out reduction reaction or reacted with the carbon in high carbon ferro-chrome by silica intoAfter row carbon elimination, can make good silicochromium product.
The applicant shows through the on probation of long term: the useless powder of crystalline silicon cutting really one can be used for smelting silicochromiumThe splendid raw material of alloy. Under existing smelting equipment technical conditions, useless all or part of alternative Jiao of powder of available crystalline silicon cuttingCharcoal directly ginseng is assigned in and in chrome ore raw material or high carbon ferro-chrome raw material, smelts operation and make superior in quality silicochromium product. ByHigh purity elemental silicon, carborundum in the useless powder of crystalline silicon cutting have the strong reduction characteristic of high energy, it with the oxygen of chromium and ironWhen compound is carried out reduction reaction, also can discharge a large amount of reaction heat, can greatly reduce the unit power consumption of smelting Si evanohm,Golden metallurgy industry is carried out to the work of energy-saving and emission-reduction consumption reduction and have significant technique effect.
The present invention has following outstanding substantive distinguishing features and marked improvement:
Key core technical essential of the present invention is: it is by complete the useless powder of crystalline silicon cutting with the strong reduction characteristic of high energy storagePortion or part substitute for coke are directly allocated in chrome ore raw material or high carbon ferro-chrome raw material, require according to a line smelting Si evanohmTechnique is carried out production operation can make qualified silicochromium product. It is both produced smelting Si evanohm for metallurgy industry and findsThe reducing agent raw material of a high energy, can digest on a large scale again that to solve crystalline silicon section industry long-pending for a long time because cutting useless powderPress and stack the problem of environmental pollution existing. The present invention has that technology is simple and direct, production operation is convenient, recycle silicon resource jointCan the effective outstanding advantages with reducing silicochromium production cost of consumption reduction. Show through on probation: the present invention has significantly reallySocial enviroment protection effect and great economic benefit, in metallurgy industry and solar energy new forms of energy industry, have well and applyProspect.
Detailed description of the invention
Embodiment mono-: with the enforcement side of the useless powder substitute for coke reducing chrome ore raw material one-step method smelting Si evanohm of crystalline silicon cuttingFormula
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, it carries out successively according to the following steps:
1. batching: take material by the metering of following weight parts proportioning,
Chrome ore raw material 1000kg,
The useless powder 850kg of crystalline silicon cutting.
Above-mentioned " chrome ore raw material " refers to and meets smelting Si evanohm technique to enter one or more chrome ores of stove technical indicator mixedCompound;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
2. entering stove smelts: by the material input ferroalloy smelting that in " batching " step, metering takes by weight ratioIn refining mineral hot furnace, smelt operation by the operational procedure of smelting Si evanohm requirement.
3. the casting of tapping a blast furnace: remove slag operation to smelting qualified Molten Ferroalloys, molten iron is cast in to ingot mouldIn, carry out after cooling finishing operation removal and carry slag secretly, can make qualified silicochromium product.
Embodiment bis-: by the reality of the useless powder substitute for coke reducing chrome ore raw material one-step method smelting Si evanohm of crystalline silicon cuttingExecute mode
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, it carries out successively according to the following steps:
1. batching: take material by the metering of following weight parts proportioning,
Chrome ore raw material 1000kg,
The useless powder 750kg of crystalline silicon cutting.
Above-mentioned " chrome ore raw material " refers to and meets smelting Si evanohm technique to enter one or more chrome ores of stove technical indicator mixedCompound;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
Carry out successively again the operation of " 2. enter stove is smelted, the 3. casting of tapping a blast furnace " step by the mode described in embodiment mono-,Can make qualified silicochromium product.
Embodiment tri-: the reality that useless crystalline silicon cutting powder is suppressed to the one-step method smelting Si evanohm of pelletizing fed to boilerExecute mode
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, is characterized in that: it successively by withLower step is carried out,
1. batching: take material by the metering of following weight parts proportioning,
Chrome ore raw material 1000kg,
The useless powder 750kg of crystalline silicon cutting.
Above-mentioned " chrome ore raw material " refers to and meets smelting Si evanohm technique to enter one or more chrome ores of stove technical indicator mixedCompound;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
2. powder pressure ball: the useless powder of 750kg crystalline silicon cutting that metering in " batching " step is taken is put into stirringIn machine, then metering takes 75kg cement and puts into mixer, adds 60kg water, stirs operation and makes compound; To mixMaterial is sent in powerful ball press and is suppressed pelletizing operation, can make spherical material, and the diameter of controlling spherical material is 25mm.
3. entering stove smelts: will be in " batching " step metering takes by weight ratio 1000kg chrome ore raw material withIn the spherical material input ferroalloy smelting mineral hot furnace making in " powder pressure ball " step, by the operation of smelting Si evanohm requirementCode is smelted operation.
4. the casting of tapping a blast furnace: to smelting qualified Molten Ferroalloys of coming out of the stove after removing slag, molten iron is cast in to ingot mouldIn, carry out after cooling finishing operation removal and carry slag secretly, can make qualified silicochromium product.
Embodiment tetra-: with the useless powder part substitute for coke reducing chrome ore raw material one-step method smelting Si evanohm of crystalline silicon cuttingEmbodiment
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, it carries out successively according to the following steps:
1. batching: take material by the metering of following weight parts proportioning,
Chrome ore raw material 1000kg,
The useless powder 400kg of crystalline silicon cutting,
Coke 150kg,
Silica 150kg.
Above-mentioned " chrome ore raw material " refers to and meets smelting Si evanohm technique to enter one or more chrome ores of stove technical indicator mixedCompound;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
Carry out successively again the operation of " 2. enter stove is smelted, the 3. casting of tapping a blast furnace " step by the mode described in embodiment mono-,Can make qualified silicochromium product.
Embodiment five: the reality that useless crystalline silicon cutting powder is suppressed to the one-step method smelting Si evanohm of pelletizing fed to boilerExecute mode
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, it carries out successively according to the following steps:
1. batching: take material by the metering of following weight parts proportioning,
Chrome ore raw material 1000kg,
The useless powder 500kg of crystalline silicon cutting,
Coke 200kg,
Silica 100kg.
Above-mentioned " chrome ore raw material " refers to and meets smelting Si evanohm technique to enter one or more chrome ores of stove technical indicator mixedCompound;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
2. powder pressure ball: the useless powder of 500kg crystalline silicon cutting that metering in " batching " step is taken is put into stirringIn machine, then metering takes 50kg cement and puts into mixer, adds 35kg water, stirs operation and makes compound; To mixMaterial is sent in powerful ball press and is suppressed pelletizing operation, can make spherical material, and the diameter of controlling spherical material is 30mm.
3. entering stove smelts: will be in " batching " step measure by weight ratio the 1000kg chrome ore raw material that takes,In the spherical material input ferroalloy smelting mineral hot furnace making in 200kg coke, 100kg silica and " powder pressure ball " step, pressThe operational procedure that smelting Si evanohm requires is smelted operation.
4. the casting of tapping a blast furnace: to smelting qualified Molten Ferroalloys of coming out of the stove after removing slag, molten iron is cast in to ingot mouldIn, carry out after cooling finishing operation removal and carry slag secretly, can make qualified silicochromium product.
Embodiment six: with the enforcement side of the useless powder reduction of crystalline silicon cutting high carbon ferro-chrome raw material two-step smelting silicochromiumFormula
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, it carries out successively according to the following steps:
1. batching: take material by the metering of following weight parts proportioning,
High carbon ferro-chrome raw material 1000kg,
The useless powder 700kg of crystalline silicon cutting,
Coke 400kg,
Silica 1000kg,
Steel cuttings 50kg.
Above-mentioned " high carbon ferro-chrome raw material " refers to one or more height that meet smelting Si evanohm technique and enter stove technical indicatorThe mixture of carbon ferrochrome;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
Carry out successively again the operation of " 2. enter stove is smelted, the 3. casting of tapping a blast furnace " step by the mode described in embodiment mono-,Can make qualified silicochromium product.
Embodiment seven: by the enforcement side of the two-step smelting silicochromium of the useless powder pressing pelletizing fed to boiler of crystalline silicon cuttingFormula
A production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, it carries out successively according to the following steps:
1. batching: take material by the metering of following weight parts proportioning,
High carbon ferro-chrome raw material 1000kg,
The useless powder 800kg of crystalline silicon cutting,
Coke 400kg,
Silica 1000kg,
Steel cuttings 80kg.
Above-mentioned " high carbon ferro-chrome raw material " refers to one or more height that meet smelting Si evanohm technique and enter stove technical indicatorThe mixture of carbon ferrochrome;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains.
2. powder pressure ball: the useless powder of 800kg crystalline silicon cutting that metering in " batching " step is taken is put into stirringIn machine, then metering takes 80kg cement and puts into mixer, then adds after 50kg water, stirs operation and makes compound; WillCompound is sent in powerful ball press and is suppressed pelletizing operation, can make spherical material, and the diameter of controlling spherical material is25mm。
3. entering stove smelts: by former the 1000kg high carbon ferro-chrome that in " batching " step, metering takes by weight ratioThe spherical material input ferroalloy smelting making in material, 400kg coke, 1000kg silica, 80kg steel cuttings and " powder pressure ball " stepIn refining mineral hot furnace, smelt operation by the operational procedure of smelting Si evanohm requirement.
4. the casting of tapping a blast furnace: to smelting qualified Molten Ferroalloys of coming out of the stove after removing slag, molten iron is cast in to ingot mouldIn, carry out after cooling finishing operation removal and carry slag secretly, can make qualified silicochromium product.
Claims (10)
1. a production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, is characterized in that: it is pressed successivelyFollowing steps are carried out,
1. batching: take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.35-0.90 part of the useless powder of crystalline silicon cutting,
Above-mentioned " chrome ore raw material " refers to one or more chrome ore mixtures that meet smelting Si evanohm technique and enter stove technical indicator;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains;
2. entering stove smelts: in the material input ferroalloy smelting mineral hot furnace that metering takes by weight ratio, by smelting silicochromiumThe operational procedure that alloy requires is smelted operation;
3. the casting of tapping a blast furnace: remove after slag operation smelting qualified Molten Ferroalloys, molten iron is cast in ingot mould,Carry out after cooling finishing operation removal and carry slag secretly, can make silicochromium product.
2. a kind of production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting according to claim 1,It is characterized in that: in " batching " step, take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.65-0.85 part of the useless powder of crystalline silicon cutting.
3. a kind of production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting according to claim 1,It is characterized in that: in " batching " step, take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.75 part of the useless powder of crystalline silicon cutting.
4. a production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, is characterized in that: it is pressed successivelyFollowing steps are carried out,
1. batching: take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.35-0.90 part of the useless powder of crystalline silicon cutting,
0.05-0.40 part, coke,
0.05-0.30 part, silica,
Above-mentioned " chrome ore raw material " refers to one or more chrome ore mixtures that meet smelting Si evanohm technique and enter stove technical indicator;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains;
2. entering stove smelts: in the material input ferroalloy smelting stove that metering takes by weight ratio, by smelting Si evanohmThe operational procedure requiring is smelted operation;
3. the casting of tapping a blast furnace: remove after slag operation smelting qualified Molten Ferroalloys, molten iron is cast in ingot mould,Carry out after cooling finishing operation removal and carry slag secretly, can make silicochromium product.
5. a kind of production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting according to claim 4,It is characterized in that: in " batching " step, take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.45-0.55 part of the useless powder of crystalline silicon cutting,
0.10-0.30 part, coke,
0.05-0.20 part, silica.
6. a kind of production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting according to claim 4,It is characterized in that: in " batching " step, take material by the metering of following weight parts proportioning,
1 part of chrome ore raw material,
0.50 part of the useless powder of crystalline silicon cutting,
0.20 part, coke,
0.10 part, silica.
7. a production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting, is characterized in that: it is pressed successivelyFollowing steps are carried out,
1. batching: take material by the metering of following weight parts proportioning,
1 part of high carbon ferro-chrome raw material,
0.30-1.30 parts of the useless powders of crystalline silicon cutting,
0.10-0.80 part, coke,
0.50-1.80 parts, silica,
0.02-0.15 part of steel cuttings,
Above-mentioned " high carbon ferro-chrome raw material " refers to one or more high carbon chromiums that meet smelting Si evanohm technique and enter stove technical indicatorThe mixture of iron;
Above-mentioned " the useless powder of crystalline silicon cutting " refers to that the cutting mortar waste material that polysilicon, slicing single crystal silicon operation are produced carries outThe Si powder waste material that recovery obtains;
2. entering stove smelts: in the material input ferroalloy smelting stove that metering takes by weight ratio, by smelting Si evanohmThe operational procedure requiring is smelted operation;
3. the casting of tapping a blast furnace: remove after slag operation smelting qualified Molten Ferroalloys, molten iron is cast in ingot mould,Carry out after cooling finishing operation removal and carry slag secretly, can make silicochromium product.
8. a kind of production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting according to claim 7,It is characterized in that: in " batching " step, take material by the metering of following weight parts proportioning,
1 part of high carbon ferro-chrome raw material,
0.50-0.90 part of the useless powder of crystalline silicon cutting,
0.30-0.60 part, coke,
0.50-1.50 parts, silica,
0.05-0.10 part of steel cuttings.
9. a kind of production method of recycling the useless powder smelting Si evanohm of crystalline silicon cutting according to claim 7,It is characterized in that: in " batching " step, take material by the metering of following weight parts proportioning,
1 part of high carbon ferro-chrome raw material,
0.70 part of the useless powder of crystalline silicon cutting,
0.40 part, coke,
1.00 parts, silica,
0.08 part of steel cuttings.
10. according to a kind of production of recycling the useless powder smelting Si evanohm of crystalline silicon cutting described in claim 1,4 or 7Method, is characterized in that: between " batching " and " entering stove smelts ", also have the step of " powder pressure ball ", it is by weighing balanceThe useless powder of crystalline silicon cutting of getting is put into mixer, takes cement put into by 5%-15% of the useless powder weight of crystalline silicon cuttingIn mixer, then after adding water by 6%-10% of the useless powder weight of crystalline silicon cutting, stir operation and make compound; To mixMaterial is sent in powerful ball press and is suppressed pelletizing operation, makes spherical material, and the diameter of controlling spherical material is 10-40mm。
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