CN107267854B - The smelting process and product of a kind of high carbon ferro-chrome - Google Patents
The smelting process and product of a kind of high carbon ferro-chrome Download PDFInfo
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- CN107267854B CN107267854B CN201710464230.7A CN201710464230A CN107267854B CN 107267854 B CN107267854 B CN 107267854B CN 201710464230 A CN201710464230 A CN 201710464230A CN 107267854 B CN107267854 B CN 107267854B
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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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
Abstract
The invention provides a kind of smelting process of high carbon ferro-chrome and product, the smelting process of high carbon ferro-chrome of the present invention uses magnesium-containing aid, Mg compositions are supplemented in the feed, slag former can be played a part of, what is more important can adjust the ratio of the Mg and Al (itself containing Al in chromite) in raw material, effectively improve the reduction effect in smelting process, it is possible to increase the quality and performance of products obtained therefrom.The smelting process technique of high carbon ferro-chrome of the present invention is simple, and hand labor intensity is low, and loss is few, and generation flue gas is few, easily collecting processing, disclosure satisfy that environmental requirement.High carbon ferro-chrome product cost of the present invention is low, is easily obtained, and has excellent quality and performance.
Description
Technical field
The present invention relates to technical field of metallurgy industry, in particular to the smelting process and product of a kind of high carbon ferro-chrome.
Background technology
Ferrochrome is the most important raw material for producing stainless steel, is mainly used in production stainless steel, ball-bearing steel, instrument
Steel, nitrided steel, refractory steel, quenched and tempered steel, carburizing steel and hydrogen resistant steel, this is due to chromium playing a decisive role in stainless steel, is determined
The element of stainless steel attribute only has one kind, and here it is chromium, a number of chromium is necessarily contained in every kind of stainless steel capital.Stainless steel it is resistance to
Corrosion is mainly derived from chromium.It is demonstrated experimentally that the corrosion resisting property of steel can just greatly improve when only chrome content is more than 12%, therefore,
Chrome content in stainless steel is generally not less than 12%.So the state between supply and demand of chromite is the state between supply and demand with stainless steel market
Closely bound up.
High carbon ferro-chrome is mainly used in stainless steel production, wherein 200 be that stainless steel chrome content about 16%, 300 is stainless steel
Chrome content is stainless steel chrome content about 14% about 25%, 400.What ferrochrome had the call 300 is that stainless steel is also stainless
The product of maximum ratio in steel production.Alloying constituent as carbon containing higher bearing quality steel, tool steel and high-speed steel, improves quenching for steel
Permeability, increase the wearability and hardness of steel；Additive as cast iron, improve the wearability of cast iron and improve hardness, make simultaneously
Cast iron has good heat resistance；As slagless process production silicochromium and in, low ＆ micro carbon ferrochromium contain Cr materials；As electricity
Solution production crome metal contains Cr materials；Raw material as blow oxygen smelting stainless steel.
The smelting process of high carbon ferro-chrome has blast furnace process, electric furnace process, plasma oven process etc..It can only be made using blast furnace and existed containing chromium
30% or so obtains special iron.Mostly smelted containing the high high carbon ferro-chrome of chromium using flux method in mineral hot furnace.
The general principle of electric furnace process smelting high carbon ferrochrome is the oxide of chromium and iron in reduction with carbon chrome ore.Carbon reduction-oxidation
Chromium generates Cr2C2Start temperature be 1373K, generate Cr7C3Reaction start temperature 1403K, and reduce generation chromium reaction open
Beginning temperature is 1523K, thus obtained in carbon reducing chrome ore be chromium carbide, rather than crome metal.Phosphorus content in ferrochrome
Height depend on reaction temperature.The high carbide of the generation phosphorus content carbide lower than generation phosphorus content is easier.
The raw material of smelting high carbon ferrochrome uses chrome ore, coke and silica in correlation technique, and wherein silica is as slag former, original
Mg and Al content can not be too high in the upper considered critical raw material of material proportioning, and obtained high carbon ferro-chrome product quality and performance are not
It is good.In addition, the smelting of correlation technique medium high carbon ferrochrome uses traditional second casting technique, production link is more, complex operation, work
People's labor intensity is big, and loss caused by molten iron is tied up with is more, tapping casting time length, exacerbates the segregation of ferrous components, influences product
Quality and performance, while caused flue gas is more, not easily collecting.Cooling of furnace slag is carried out using water quenching method in correlation technique,
Easily occur to spray quick-fried accident, also increase exhaust gas volumn.
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is to provide a kind of smelting process of high carbon ferro-chrome, and this method technique is simple, using containing
Magnesium auxiliary agent, in the feed supplemented with Mg compositions, slag former can be played a part of, what is more important can be adjusted in raw material
Mg and Al (itself containing Al in chromite) ratio, effectively improve the reduction effect in smelting process, it is possible to increase gained produces
The quality and performance of product.
The second object of the present invention is to provide the height that a kind of smelting process of the high carbon ferro-chrome described in use is prepared
Carbon ferrochrome product, described high carbon ferro-chrome product cost is low, is easily obtained, and has excellent quality and performance.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
A kind of smelting process of high carbon ferro-chrome, is smelted using chromite, coke and magnesium-containing aid as primary raw material.
The smelting process technique of high carbon ferro-chrome of the present invention is simple, using magnesium-containing aid, in the feed supplemented with Mg compositions, energy
Enough play a part of slag former, what is more important can adjust the ratio of the Mg and Al (itself containing Al in chromite) in raw material
Example, effectively improves the reduction effect in smelting process, it is possible to increase the quality and performance of products obtained therefrom.
Alternatively, the magnesium-containing aid includes magnesium-containing oxide, containing the one or more in magnesium salts and magnesium-containing mineral.
Alternatively, the magnesium-containing aid includes the one or more in magnesium and silicon contained auxiliary agent, preferably includes to contain magnesium and silicon
Oxide, the one or more in magnesium and silicon contained salt and magnesium and silicon contained mineral.
Alternatively, the magnesium-containing aid includes magnesite, shepardite, sepiolite, talcum, forsterite, the tremolite, stone
One or more in cotton, serpentine and humite, preferably include talcum, forsterite, the tremolite, asbestos, serpentine and silicon
One or more in magnesite, further preferably include the one or more in serpentine and humite.
Preferably, the mass ratio of magnesium and silicon is 1-5 in the magnesium and silicon contained auxiliary agent：2-6, preferably 2-4：3-5, enter one
Step is preferably 3：4.
Alternatively, the mass ratio of the chromite, coke and magnesium-containing aid is 30-70：5-15：1-10, preferably 40-
60：8-14：3-7, more preferably 50：11：5.
Alternatively, the temperature of the smelting is more than 1500 DEG C, preferably 1650-1800 DEG C, more preferably 1700
℃。
Alternatively, the time of the smelting is more than 5h, preferably 6-8h, more preferably 6h.
Alternatively, come out of the stove after the completion of smelting, molten iron of coming out of the stove is collected with iron bag, to hot-metal insulating, after the completion of coming out of the stove, from Tie Bao
Middle releasing molten iron, casting, finishing obtain high carbon ferro-chrome product.
Preferably, it is described to smelt, come out of the stove and carry out dedusting in casting cycle respectively.
Preferably, the volume of the iron bag is 5m3More than, preferably 5-10m3, more preferably 8m3。
Preferably, the time control of molten iron is released from iron bag within 20min, preferably 10-20min is further excellent
Elect 15min as.
Preferably, the casting is cast using single.
Preferably, the casting includes importing molten iron in fixing mould and carried out.
Preferably, jigging is carried out in 76 finishing.
Alternatively, come out of the stove after the completion of smelting, gained clinker carries out bubble slag.
Preferably, the bubble cinder ladle includes clinker after the collection of transition bag, flows into bubble slag agent, bubble slag agent submergence clinker.
It is further preferred that the volume ratio of the bubble slag agent and clinker is 2-10：1, preferably 4-6：1, further preferably
For 5：1.
It is further preferred that the bubble slag agent includes coolant, water is preferably included.
Preferably, come out of the stove after the completion of smelting, gained grit melts down as raw material to be smelted again.
Preferably, the particle diameter of the clinker is below 5mm.
Alternatively, the chromite and coke are pre-processed respectively.
Preferably, the chromite includes fine ore and lump ore.
It is further preferred that the pretreatment of the fine ore includes ore grinding, dispensing, mixed ore deposit, pelletizing, roasting, pelletizing.
It is highly preferred that the temperature of the roasting is more than 1000 DEG C, preferably more than 1000-1300 DEG C, further preferably
For 1100 DEG C.
It is further preferred that the pretreatment of the lump ore includes crushing.
Preferably, the pretreatment of the coke includes drying.
The high carbon ferro-chrome product being prepared using a kind of smelting process of above-mentioned high carbon ferro-chrome.
High carbon ferro-chrome product cost of the present invention is low, is easily obtained, and has excellent quality and performance.
Compared with prior art, beneficial effects of the present invention are：
The smelting process of high carbon ferro-chrome of the present invention uses magnesium-containing aid, in the feed supplemented with Mg compositions, can play and make
The effect of slag agent, what is more important can adjust the ratio of the Mg and Al (itself containing Al in chromite) in raw material, effectively change
The reduction effect being apt in smelting process, it is possible to increase the quality and performance of products obtained therefrom.The smelting side of high carbon ferro-chrome of the present invention
Method technique is simple, and hand labor intensity is low, and loss is few, and generation flue gas is few, easily collecting processing, disclosure satisfy that environmental requirement.This hair
Bright high carbon ferro-chrome product cost is low, is easily obtained, and has excellent quality and performance.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of high-carbon chrome iron for smelting method process chart of optional embodiment of the present invention.
Embodiment
Technical scheme is clearly and completely described below in conjunction with the drawings and specific embodiments, but
Be it will be understood to those of skill in the art that following described embodiment is part of the embodiment of the present invention, it is rather than whole
Embodiment, the present invention is merely to illustrate, and is not construed as limiting the scope of the present invention.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to guarantor of the present invention
The scope of shield.Unreceipted actual conditions person in embodiment, the condition suggested according to normal condition or manufacturer are carried out.Agents useful for same
Or the unreceipted production firm person of instrument, it is the conventional products that can be obtained by commercially available purchase.
The specific embodiment of the invention provides a kind of smelting process of optional high carbon ferro-chrome, with chromite, coke
Make and magnesium-containing aid is smelted as raw material.
The smelting process technique of high carbon ferro-chrome of the present invention is simple, using magnesium-containing aid, in the feed supplemented with Mg compositions, energy
Enough play a part of slag former, what is more important can adjust the ratio of the Mg and Al (itself containing Al in chromite) in raw material
Example, effectively improves the reduction effect in smelting process, it is possible to increase the quality and performance of products obtained therefrom.
In a kind of preferred embodiment of the present invention, the magnesium-containing aid includes magnesium-containing oxide, containing magnesium salts and contains
One or more in magnesium mineral.
In a kind of preferred embodiment of the present invention, the magnesium-containing aid includes one kind in magnesium and silicon contained auxiliary agent
Or it is a variety of, preferably include the one or more in magnesium and silicon contained oxide, magnesium and silicon contained salt and magnesium and silicon contained mineral.
In a kind of preferred embodiment of the present invention, the magnesium-containing aid include magnesite, shepardite, sepiolite,
One or more in talcum, forsterite, the tremolite, asbestos, serpentine and humite, preferably include talcum, forsterite,
One or more in the tremolite, asbestos, serpentine and humite, further preferably include one kind in serpentine and humite
It is or a variety of.
Using the magnesium-containing aid of special component, the Mg and Al ratio contributed in further regulation raw material, further smelting
Reduction effect during refining, improve the quality and performance of products obtained therefrom.Wherein, using serpentine etc. simultaneously containing Mg's and Si
Auxiliary agent, in the feed supplemented with Mg compositions, slag former can be played a part of, Si can also be played in correlation technique and done using silica
The effect of slag former, impurity can be further removed, improve the quality and performance of products obtained therefrom.
Preferably, the mass ratio of magnesium and silicon is 1-5 in the magnesium and silicon contained auxiliary agent：2-6, preferably 2-4：3-5, enter one
Step is preferably 3：4.
Using specific magnesium and the magnesium and silicon contained auxiliary agent of silicon mass ratio, help further to improve the reduction in smelting process
The removal efficiency of effect and impurity, improve the quality and performance of products obtained therefrom.Auxiliary agent only containing magnesium and only siliceous is being selected respectively
Auxiliary agent when, the mass ratio of magnesium and silicon is advisable with aforementioned proportion, and the auxiliary agent containing magnesium and silicon simultaneously also may be selected, be not required to again
Add the mass ratio of other auxiliary agents adjustment magnesium and silicon.
In a kind of preferred embodiment of the present invention, the mass ratio of the chromite, coke and magnesium-containing aid is 30-
70：5-15：1-10, preferably 40-60：8-14：3-7, more preferably 50：11：5.
Using the mass ratio of specific chromite, coke and magnesium-containing aid, it can further improve going back in smelting process
The removal efficiency of former effect and impurity, further improve the quality and performance of products obtained therefrom.
In a kind of preferred embodiment of the present invention, the temperature of the smelting is more than 1500 DEG C, preferably 1650-
1800 DEG C, more preferably 1700 DEG C.
In a kind of preferred embodiment of the present invention, the time of the smelting is more than 5h, preferably 6-8h, enters one
Step is preferably 6h.
Using specific smelting temperature and time, compared to related-art process, furnace temperature is improved, adds heat electricity consumption
Amount, and what is extended comes out of the stove the time and (is generally 3h in correlation technique to come out of the stove), the good fluidity of molten iron, greater homogeneity, furnace reduction
Effect substantially improves.
In a kind of preferred embodiment of the present invention, come out of the stove after the completion of smelting, molten iron of coming out of the stove is collected with iron bag, to iron
Water is incubated, and after the completion of coming out of the stove, molten iron is released from iron bag, is cast, and finishing obtains high carbon ferro-chrome product.
Preferably, it is described to smelt, come out of the stove and carry out dedusting in casting cycle respectively.
Flue gas and other particulate pollutants can be effectively removed smelting, coming out of the stove and being carried out respectively in casting cycle dedusting,
Meet environmental requirement.
Preferably, the volume of the iron bag is 5m3More than, preferably 5-10m3, more preferably 8m3。
Molten iron is contained using Large Fe bag, is reduced in correlation technique and is contained repeatedly using multiple iron bags, discharges molten iron and make
Into molten iron be tied up with waste, avoid having an impact molten iron flow, effectively reduce heat loss, avoid to products obtained therefrom quality
Impacted with performance.
Preferably, the time control of molten iron is released from iron bag within 20min, preferably 10-20min is further excellent
Elect 15min as.
Using compared to correlation technique (generally more than 30min) the faster iron bag molten iron discharging time, iron can be effectively controlled
The segregation of composition, improve the quality and performance of products obtained therefrom.
Preferably, the casting is cast using single.
Cast using single, i.e., will directly come out of the stove molten iron, be introduced directly into mould and be cast after iron bag is collected completely,
Compared to traditional second casting, the labor intensity of worker greatly reduces, while reduces related auxiliary material, production spare part, saves
Build bag, repair bag etc. link, process simply also reduce the occurrence frequency of security incident.
Preferably, the casting includes importing molten iron in fixing mould and carried out.
Cast using fixing mould, moved moulds compared to what is used in correlation technique, can complete to cast faster
Technique, effectively reduce the segregation of ferrous components.
Preferably, jigging is carried out in the finishing.
Jigging is carried out in finishing, can further remove granule foreign or residue in product, the jigging can
Completed using existing jigging machine.
Alternatively, come out of the stove after the completion of smelting, gained clinker carries out bubble slag.
Preferably, the bubble cinder ladle includes clinker after the collection of transition bag, flows into bubble slag agent, bubble slag agent submergence clinker.
Using bubble slag technique, can effectively control in correlation technique using the hair of the quick-fried security incident of spray caused by water quenching technology
It is raw.
It is further preferred that the volume ratio of the bubble slag agent and clinker is 2-10：1, preferably 4-6：1, further preferably
For 5：1.
Using specific bubble slag agent and the volume ratio of clinker, it can effectively prevent from spraying the generation of quick-fried security incident.
It is further preferred that the bubble slag agent includes coolant, water is preferably included, cost is low, is easy to get.
Clinker after steeping Slag treatment, collect and carry out subsequent treatment.
Preferably, come out of the stove after the completion of smelting, gained grit can melt down as raw material and be smelted again.
Preferably, the particle diameter of the clinker is below 5mm.
By the size controlling of clinker in below 5mm, it can effectively prevent from spraying the generation of quick-fried security incident, with reference to above-mentioned smelting
Refine, go out furnace technology and can effectively control the particle diameter of gained clinker, and can be according to actual conditions using the means control bubble slag such as broken
The particle diameter of preceding clinker.
In a kind of preferred embodiment of the present invention, the chromite and coke are pre-processed respectively.
Preferably, the chromite includes fine ore and lump ore.
It is further preferred that the pretreatment of the fine ore includes ore grinding, dispensing, mixed ore deposit, pelletizing, roasting, pelletizing.
It is highly preferred that the temperature of the roasting is more than 1000 DEG C, preferably more than 1000-1300 DEG C, further preferably
For 1100 DEG C.
Using the temperature of specific roasting, help to obtain the burden structure suitable for smelting, the granularity of gained pellet it is small and
Uniformly, the improvement of breathability of stock column for blast furnace and being uniformly distributed for air-flow are advantageous to；The cold strength (resistance to compression and wear-resistant) of pellet
Height, it is readily transported, loads and unloads and stores, powder is few；Iron part of pellet is high and heap density is big, is advantageous to increase having for blast furnace stock column
Weight is imitated, yield is improved and reduces coke ratio；Pellet it is Well-recovered, be favorably improved the quality and performance of products obtained therefrom.
It is further preferred that the pretreatment of the lump ore includes crushing.
Preferably, the pretreatment of the coke includes drying.
The usage ratio of above-mentioned each raw material according to material composition, property and can be actually needed further adjustment.
Fig. 1 is a kind of high-carbon chrome iron for smelting method process chart of optional embodiment of the present invention.
Chromite is mainly purchased from South Africa and Turkey, Cr in various embodiments of the present invention2O3>=40%, Cr2O3/∑FeO≥
1.6, S≤0.05%, P≤0.013%, enter stove granularity 10-80mm (pelletizing 10-20mm)；Coke is domestic, containing fixed carbon not
Less than 84%, ash content is less than 15%, S≤0.8%, granularity 8-30mm；Serpentine is domestic, without soil, granularity 20-60mm.
The high carbon ferro-chrome product being prepared using a kind of smelting process of above-mentioned high carbon ferro-chrome.
High carbon ferro-chrome product cost of the present invention is low, is easily obtained, and has excellent quality and performance.
Embodiment 1
A kind of smelting process of high carbon ferro-chrome, including：
Mass ratio according to chromite, coke and humite is 30：5：1 ratio is stocked up respectively, chromite, coke and silicon
The gross weight of magnesite is 20t；
Pretreating process of the fine ore successively through ore grinding, dispensing, mixed ore deposit, pelletizing, roasting and pelletizing in chromite, wherein roasting
It is 1000 DEG C to burn temperature；Lump ore in chromite is through broken pretreatment；Coke drying pre-processes；
Feeding after pretreated chromite, coke and humite dispensing is smelted into electric furnace in proportion, smelted
Temperature be 1500 DEG C, the time of smelting is 5h；
Come out of the stove after the completion of smelting, gained clinker is flowed into water after the collection of transition bag, and the volume ratio of water and clinker is 2：1；
Come out of the stove after the completion of smelting, gained grit melts down as raw material to be smelted again；The size controlling of the clinker is in below 5mm；
Come out of the stove after the completion of smelting, collect molten iron of coming out of the stove with iron bag, the volume of iron bag is 5m3, to hot-metal insulating, completion of coming out of the stove
Afterwards, molten iron is released from iron bag, the time control of molten iron is released from iron bag in 10min, molten iron is imported in fixing mould
Row single is cast, finishing, is carried out jigging using jigging machine in finishing, is obtained high carbon ferro-chrome product；
It is described to smelt, come out of the stove and carry out dedusting in casting cycle respectively.
Embodiment 2
A kind of smelting process of high carbon ferro-chrome, including：
Mass ratio according to chromite, coke and humite is 70：15：10 ratio is stocked up respectively, chromite, coke and
The gross weight of humite is 25t；
Pretreating process of the fine ore successively through ore grinding, dispensing, mixed ore deposit, pelletizing, roasting and pelletizing in chromite, wherein roasting
It is 1300 DEG C to burn temperature；Lump ore in chromite is through broken pretreatment；Coke drying pre-processes；
Feeding after pretreated chromite, coke and humite dispensing is smelted into electric furnace in proportion, smelted
Temperature be 1650 DEG C, the time of smelting is 6h；
Come out of the stove after the completion of smelting, gained clinker is flowed into water after the collection of transition bag, and the volume ratio of water and clinker is 10：
1；Come out of the stove after the completion of smelting, gained grit melts down as raw material to be smelted again；The size controlling of the clinker 5mm with
Under；
Come out of the stove after the completion of smelting, collect molten iron of coming out of the stove with iron bag, the volume of iron bag is 8m3, to hot-metal insulating, completion of coming out of the stove
Afterwards, molten iron is released from iron bag, the time control of molten iron is released from iron bag in 20min, molten iron is imported in fixing mould
Row single is cast, finishing, is carried out jigging using jigging machine in finishing, is obtained high carbon ferro-chrome product；
It is described to smelt, come out of the stove and carry out dedusting in casting cycle respectively.
Embodiment 3
A kind of smelting process of high carbon ferro-chrome, including：
Mass ratio according to chromite, coke and humite is 40：8：3 ratio is stocked up respectively, chromite, coke and snake
The gross weight of line stone is 30t；
Pretreating process of the fine ore successively through ore grinding, dispensing, mixed ore deposit, pelletizing, roasting and pelletizing in chromite, wherein roasting
It is 1200 DEG C to burn temperature；Lump ore in chromite is through broken pretreatment；Coke drying pre-processes；
Feeding after pretreated chromite, coke and humite dispensing is smelted into electric furnace in proportion, smelted
Temperature be 1800 DEG C, the time of smelting is 8h；
Come out of the stove after the completion of smelting, gained clinker is flowed into water after the collection of transition bag, and the volume ratio of water and clinker is 4：1；
Come out of the stove after the completion of smelting, gained grit melts down as raw material to be smelted again；The size controlling of the clinker is in below 5mm；
Come out of the stove after the completion of smelting, collect molten iron of coming out of the stove with iron bag, the volume of iron bag is 10m3, to hot-metal insulating, come out of the stove
Cheng Hou, molten iron is released from iron bag, the time control of molten iron is released from iron bag in 12min, molten iron is imported in fixing mould
Single casting is carried out, finishing, jigging is carried out using jigging machine in finishing, obtains high carbon ferro-chrome product；
It is described to smelt, come out of the stove and carry out dedusting in casting cycle respectively.
Embodiment 4
A kind of smelting process of high carbon ferro-chrome, including：
Mass ratio according to chromite, coke and humite is 60：14：7 ratio is stocked up respectively, chromite, coke and
The gross weight of serpentine is 30t；
Pretreating process of the fine ore successively through ore grinding, dispensing, mixed ore deposit, pelletizing, roasting and pelletizing in chromite, wherein roasting
It is 1150 DEG C to burn temperature；Lump ore in chromite is through broken pretreatment；Coke drying pre-processes；
Feeding after pretreated chromite, coke and humite dispensing is smelted into electric furnace in proportion, smelted
Temperature be 1750 DEG C, the time of smelting is 7h；
Come out of the stove after the completion of smelting, gained clinker is flowed into water after the collection of transition bag, and the volume ratio of water and clinker is 6：1；
Come out of the stove after the completion of smelting, gained grit melts down as raw material to be smelted again；The size controlling of the clinker is in below 5mm；
Come out of the stove after the completion of smelting, collect molten iron of coming out of the stove with iron bag, the volume of iron bag is 6m3, to hot-metal insulating, completion of coming out of the stove
Afterwards, molten iron is released from iron bag, the time control of molten iron is released from iron bag in 18min, molten iron is imported in fixing mould
Row single is cast, finishing, is carried out jigging using jigging machine in finishing, is obtained high carbon ferro-chrome product；
It is described to smelt, come out of the stove and carry out dedusting in casting cycle respectively.
Embodiment 5
A kind of smelting process of high carbon ferro-chrome, including：
Mass ratio according to chromite, coke and humite is 50：11：5 ratio is stocked up respectively, chromite, coke and
The gross weight of serpentine is 30t；
Pretreating process of the fine ore successively through ore grinding, dispensing, mixed ore deposit, pelletizing, roasting and pelletizing in chromite, wherein roasting
It is 1100 DEG C to burn temperature；Lump ore in chromite is through broken pretreatment；Coke drying pre-processes；
Feeding after pretreated chromite, coke and humite dispensing is smelted into electric furnace in proportion, smelted
Temperature be 1700 DEG C, the time of smelting is 6h；
Come out of the stove after the completion of smelting, gained clinker is flowed into water after the collection of transition bag, and the volume ratio of water and clinker is 5：1；
Come out of the stove after the completion of smelting, gained grit melts down as raw material to be smelted again；The size controlling of the clinker is in below 5mm；
Come out of the stove after the completion of smelting, collect molten iron of coming out of the stove with iron bag, the volume of iron bag is 8m3, to hot-metal insulating, completion of coming out of the stove
Afterwards, molten iron is released from iron bag, the time control of molten iron is released from iron bag in 15min, molten iron is imported in fixing mould
Row single is cast, finishing, is carried out jigging using jigging machine in finishing, is obtained high carbon ferro-chrome product；
It is described to smelt, come out of the stove and carry out dedusting in casting cycle respectively.
Essential element analysis (chemical analysis) is carried out respectively to high carbon ferro-chrome obtained by various embodiments of the present invention, as a result such as table
(data are mass percent of the element in sample is detected in table 1) shown in 1：
The high carbon ferro-chrome finished product Element detection analysis result of the present invention of table 1
| Embodiment | Cr/% | Si/% | P/% | C/% | S/% |
| Embodiment 1 | 53.45 | 0.74 | 0.013 | 8.10 | 0.024 |
| Embodiment 2 | 53.10 | 0.61 | 0.014 | 8.01 | 0.027 |
| Embodiment 3 | 53.33 | 0.72 | 0.013 | 8.27 | 0.026 |
| Embodiment 4 | 53.17 | 0.73 | 0.015 | 8.39 | 0.029 |
| Embodiment 5 | 53.85 | 0.76 | 0.013 | 8.35 | 0.022 |
(data are the trade mark and chemical composition of prior art Related product (GB/T5683-1987) in table 2 as shown in table 2
Mass percent of the element in sample is detected)：
The prior art high carbon ferro-chrome product grade of table 2 and component content
By the contrast of Tables 1 and 2, those skilled in the art can be seen that the content master of Cr and C in high carbon ferro-chrome product
It is relevant with used material composition and consumption proportion, and Si, P and S are corresponding as impurity element, GB/T5683-1987
Highest grade requirement respectively be less than 3%, less than 0.03% and less than 0.04%.By contrast, using present invention side
In the high carbon ferro-chrome product that method is prepared Si, P and S content respectively be less than 0.8%, less than 0.015% and
Less than 0.03%, the requirement for meeting GB/T5683-1987 is able to, and there is lower Si, P and S content.Prior art
Si, P and S of middle Related product content are typically followed successively by more than 2.5%, more than 0.022% and more than 0.06%, using this hair
The quality for the high carbon ferro-chrome product that bright method is prepared equally is better than Related product of the prior art.
Although illustrate and describing the present invention with specific embodiment, but it will be appreciated that various embodiments above is only used
To illustrate technical scheme, rather than its limitations；It will be understood by those within the art that：Without departing substantially from this hair
In the case of bright spirit and scope, the technical scheme described in foregoing embodiments can be modified, or to wherein
Some or all of technical characteristic carries out equivalent substitution；And these are changed or are replaced, the essence of appropriate technical solution is not made
Depart from the scope of various embodiments of the present invention technical scheme；It is, therefore, intended that include belonging to the present invention in the following claims
In the range of all these substitutions and modifications.
Claims (31)
1. a kind of smelting process of high carbon ferro-chrome, it is characterised in that primary raw material is being used as using chromite, coke and magnesium-containing aid
Smelted；
The magnesium-containing aid includes the one or more in magnesium and silicon contained auxiliary agent；
The magnesium-containing aid includes the one or more in talcum, forsterite, the tremolite, asbestos, serpentine and humite；
The mass ratio of magnesium and silicon is 1-5 in the magnesium and silicon contained auxiliary agent：2-6；
The mass ratio of the chromite, coke and magnesium-containing aid is 30-70：5-15：1-10；
The temperature of the smelting is more than 1500 DEG C；
The time of the smelting is more than 5h；
Come out of the stove after the completion of smelting, collect molten iron of coming out of the stove with iron bag, to hot-metal insulating, after the completion of coming out of the stove, molten iron is released from iron bag,
Casting, finishing obtain high carbon ferro-chrome product；
The volume of the iron bag is 5m3More than；
The time control of molten iron is released from iron bag within 20min；
The casting is cast using single；
The chromite and coke are pre-processed respectively；
The chromite includes fine ore and lump ore；
The pretreatment of the fine ore includes ore grinding, dispensing, mixed ore deposit, pelletizing, roasting, pelletizing；
The temperature of the roasting is more than 1000 DEG C.
2. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that the magnesium-containing aid includes snake
One or more in line stone and humite.
A kind of 3. smelting process of high carbon ferro-chrome according to claim 1, it is characterised in that the magnesium and silicon contained auxiliary agent
The mass ratio of middle magnesium and silicon is 2-4：3-5.
A kind of 4. smelting process of high carbon ferro-chrome according to claim 3, it is characterised in that the magnesium and silicon contained auxiliary agent
The mass ratio of middle magnesium and silicon is 3：4.
A kind of 5. smelting process of high carbon ferro-chrome according to claim 1, it is characterised in that the chromite, coke and
The mass ratio of magnesium-containing aid is 40-60：8-14：3-7.
A kind of 6. smelting process of high carbon ferro-chrome according to claim 5, it is characterised in that the chromite, coke and
The mass ratio of magnesium-containing aid is 50：11：5.
7. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that the temperature of the smelting is
1650-1800℃。
8. the smelting process of a kind of high carbon ferro-chrome according to claim 7, it is characterised in that the temperature of the smelting is
1700℃。
9. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that the time of the smelting is 6-
8h。
10. the smelting process of a kind of high carbon ferro-chrome according to claim 9, it is characterised in that the time of the smelting is
6h。
11. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that described to smelt, come out of the stove and pour
Dedusting is carried out during casting respectively.
12. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that the volume of the iron bag is
5-10m3。
13. the smelting process of a kind of high carbon ferro-chrome according to claim 12, it is characterised in that the volume of the iron bag is
8m3。
14. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that release molten iron from iron bag
Time control in 10-20min.
15. the smelting process of a kind of high carbon ferro-chrome according to claim 14, it is characterised in that release molten iron from iron bag
Time control in 15min.
16. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that the casting is included iron
Water is imported in fixing mould and carried out.
17. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that enter in the finishing
Row jigging.
A kind of 18. smelting process of high carbon ferro-chrome according to claim 1, it is characterised in that come out of the stove after the completion of smelting, institute
Obtain clinker and carry out bubble slag.
19. the smelting process of a kind of high carbon ferro-chrome according to claim 18, it is characterised in that the bubble cinder ladle includes clinker
After the collection of transition bag, flow into bubble slag agent, bubble slag agent submergence clinker.
20. the smelting process of a kind of high carbon ferro-chrome according to claim 19, it is characterised in that the bubble slag agent and clinker
Volume ratio be 2-10：1.
21. the smelting process of a kind of high carbon ferro-chrome according to claim 20, it is characterised in that the bubble slag agent and clinker
Volume ratio be 4-6：1.
22. the smelting process of a kind of high carbon ferro-chrome according to claim 21, it is characterised in that the bubble slag agent and clinker
Volume ratio be 5：1.
23. the smelting process of a kind of high carbon ferro-chrome according to claim 19, it is characterised in that the bubble slag agent includes cold
But liquid.
24. the smelting process of a kind of high carbon ferro-chrome according to claim 23, it is characterised in that the bubble slag agent includes
Water.
A kind of 25. smelting process of high carbon ferro-chrome according to claim 18, it is characterised in that come out of the stove after the completion of smelting,
Gained grit melts down as raw material to be smelted again.
26. the smelting process of a kind of high carbon ferro-chrome according to claim 18, it is characterised in that the particle diameter of the clinker is
Below 5mm.
27. the smelting process of a kind of high carbon ferro-chrome according to claim 1, it is characterised in that the temperature of the roasting is
More than 1000-1300 DEG C.
28. the smelting process of a kind of high carbon ferro-chrome according to claim 27, it is characterised in that the temperature of the roasting is
1100℃。
A kind of 29. smelting process of high carbon ferro-chrome according to claim 1, it is characterised in that the pretreatment of the lump ore
Including broken.
A kind of 30. smelting process of high carbon ferro-chrome according to claim 1, it is characterised in that the pretreatment of the coke
Including drying.
31. the high carbon ferro-chrome production being prepared using a kind of smelting process of any described high carbon ferro-chromes of claim 1-30
Product.
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| CN108531822A (en) * | 2018-04-16 | 2018-09-14 | 盐城市鑫洋电热材料有限公司 | A kind of preparation method of alloy |
| CN109136440A (en) * | 2018-08-06 | 2019-01-04 | 万国雄 | A kind of high carbon ferro-chrome composition and its smelting process |
| CN108977607A (en) * | 2018-08-06 | 2018-12-11 | 王德清 | A kind of joint smelting process of high carbon ferro-chrome and forsterite |
| CN108977678B (en) * | 2018-08-09 | 2019-06-28 | 徐州宏阳新材料科技有限公司 | A kind of low-Ti high-C ferrochronium and its smelting process |
| CN109097651B (en) * | 2018-08-09 | 2019-06-28 | 徐州宏阳新材料科技有限公司 | A kind of low-phosphorous high carbon ferro-chrome and its smelting process |
| CN110055453A (en) * | 2019-05-24 | 2019-07-26 | 丰镇市新太新材料科技有限公司 | A kind of smelting process of closed open arc electric furnace high carbon ferro-chrome |
| CN111876592B (en) * | 2020-08-06 | 2021-09-03 | 徐州宏阳新材料科技有限公司 | Environment-friendly ferrochrome smelting furnace burden and preparation method thereof |
| CN111876594A (en) * | 2020-08-06 | 2020-11-03 | 徐州宏阳新材料科技有限公司 | Furnace charge formula for improving ferrochrome smelting property and processing method thereof |
| CN112095041A (en) * | 2020-08-09 | 2020-12-18 | 徐州宏阳新材料科技有限公司 | Method for smelting ferrochrome by ore-smelting furnace added with serpentine |
| CN114921604A (en) * | 2022-04-02 | 2022-08-19 | 徐州宏阳新材料科技股份有限公司 | Smelting method of high-carbon ferrochrome |
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| JP2011236501A (en) * | 2010-04-15 | 2011-11-24 | Hyuga Seirensho:Kk | Ferronickel-smelting method using woody pellet |
| CN103667700B (en) * | 2013-12-11 | 2016-02-10 | 四川金广实业（集团）股份有限公司 | By the production method of carbonaceous combined reducing agent smelting high carbon ferrochrome |
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