CN106119456A - Prepare the method and system of ferrum - Google Patents
Prepare the method and system of ferrum Download PDFInfo
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- CN106119456A CN106119456A CN201610627150.4A CN201610627150A CN106119456A CN 106119456 A CN106119456 A CN 106119456A CN 201610627150 A CN201610627150 A CN 201610627150A CN 106119456 A CN106119456 A CN 106119456A
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- pelletizing
- breeze
- ferrum
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- magnetite
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/006—Starting from ores containing non ferrous metallic oxides
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- 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
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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Abstract
The invention discloses the method and system preparing ferrum.Wherein, the method preparing ferrum includes: mixed with carbon dust by vanadium titano-magnetite powder, carries out magnetizing roast process in a nitrogen atmosphere, in order to the breeze after being magnetized；Breeze after described magnetization is carried out mixing treatment with coal dust and binding agent, in order to obtain mixture；It is shaped described mixture processing, in order to obtain pelletizing；Described pelletizing is carried out reduction roasting process, in order to obtain metallized pellet；And described metallized pellet is carried out slag sluicing system process, in order to obtain ferrum and waste residue.The method is for the volumetric expansion problem caused due to crystal conversion in V-ti Bearing Magnetite Pellets reduction process, vanadium titano-magnetite powder is carried out before forming processes magnetizing roast process, schreyerite after magnetizing roast can effectively suppress due in reduction process because of the transformation of crystal formation and the volumetric expansion that produces in Ore, the schreyerite of magnetizing roast also has very good effect at aspects such as desulfurization in addition.
Description
Technical field
The present invention relates to prepare the method for ferrum and implement the system of the aforementioned method preparing ferrum.
Background technology
Vanadium titano-magnetite mainly generates in mafic or Ultrabasic Rock-Body, wherein contains multi mineral, mainly ferrum, ferrum,
The oxide of chromium and various silicate mineral, the most a small amount of sulfur, arsenic compound, phosphate mineral etc..Common are valency Ore
Mineral are mainly titanomagnetite and ferrum iron mine, in addition with a small amount of magnetic iron ore, bloodstone and sulfide etc..Ferromagnetic iron mine is one
Magnetic iron ore kind containing the solid solution separator such as ilmenite, ferrum spar, magnesium spar, crystallizable for ilmenite with magnetic through regional change
Iron mine.
V-ti magnetite concentrate is one of primary product of vanadium titano-magnetite ore dressing acquisition, and essential mineral is the titanium Magnet containing vanadium
Ore deposit, main valuable element therein is ferrum, vanadium and titanium, and vanadium is composed with isomorph form and is stored in titanomagnetite, displacement high price ferrum
Ion.Titanomagnetite is the complex formed by oikocryst mineral, chadacryst ore deposit, ilmenite, aluminum-spinel etc..
From the point of view of current present Research, to the comprehensive utilization of v-ti magnetite concentrate mainly from how to reclaim ferrum, vanadium and
Titanium is carried out, and the most representative method mainly has blast furnace process, prereduction-electric furnace process, and reduction-grinding selects method and sodium to carry also
Former electric furnace process etc..But the easy efflorescence of mineral pelletizing, reduction effect is the best, and metal recovery rate is low.
Thus, the method utilizing v-ti magnetite concentrate to prepare ferrum haves much room for improvement.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, one object of the present invention
Being to propose a kind of method preparing ferrum, the method causes due to crystal conversion in V-ti Bearing Magnetite Pellets reduction process
Volumetric expansion problem, vanadium titano-magnetite powder is carried out before forming processes magnetizing roast process, thus alleviates the swollen of pelletizing
Swollen efflorescence, reduces reaction temperature simultaneously, reduces reducing agent consumption in carbonaceous pelletizing, contributes to pelletizing and carry out reduction roasting process.
Thus, according to an aspect of the present invention, the invention provides a kind of method preparing ferrum.Reality according to the present invention
Executing example, the method includes: mixed with carbon dust by vanadium titano-magnetite powder, carries out magnetizing roast process in a nitrogen atmosphere, in order to
Breeze after being magnetized；Breeze after described magnetization is carried out mixing treatment with coal dust and binding agent, in order to obtain mixture；
It is shaped described mixture processing, in order to obtain pelletizing；Described pelletizing is carried out reduction roasting process, in order to obtain metal
Pellet；And described metallized pellet is carried out slag sluicing system process, in order to obtain ferrum and waste residue.
The method preparing ferrum according to embodiments of the present invention, turns due to crystal formation in V-ti Bearing Magnetite Pellets reduction process
The volumetric expansion problem become and cause, carries out magnetizing roast process, due to vanadium titanium before forming processes by vanadium titano-magnetite powder
The essential mineral of magnetic iron ore consists of ulvite, haplotypite, titanomagnetite and perovskite etc., vanadium titanium after magnetizing roast
Haplotypite in ore deposit is largely converted into titanomagnetite, and usual iron ore is crystal conversion to be occurred in reduction process, especially
It is Fe2O3To Fe3O4In reduction process, volume expands such that the generation causing powder phenomenon-tion, and after magnetizing roast
Schreyerite can effectively suppress due in reduction process because of the transformation of crystal formation and the volumetric expansion that produces, Roasting in addition in Ore
The schreyerite burnt also has very good effect at aspects such as desulfurization.Thus, it is straight that the method utilizing the present invention efficiently solves pelletizing
Connecing the problem reduced into the easy efflorescence of stove, the reduction efficiency of vanadium titano-magnetite is high, effective, and degree of metalization is high.
It addition, the method preparing ferrum according to the above embodiment of the present invention can also have a following additional technical characteristic:
According to embodiments of the invention, the granularity of described vanadium titano-magnetite powder is 100 mesh～200 mesh.
According to embodiments of the invention, during described magnetizing roast processes, described vanadium titano-magnetite powder and described carbon dust
Mass ratio is (0.9～1.2): 1.
According to embodiments of the invention, the temperature that described magnetizing roast processes is 700～900 DEG C, and the time is 30～60 points
Clock.
According to embodiments of the invention, the granularity of described coal dust is not more than 1 millimeter.
According to embodiments of the invention, the quality of described coal dust be described vanadium titano-magnetite powder quality (25～
30) %.
According to embodiments of the invention, the quality of described binding agent accounts for (4～6) % of described mixture quality.
According to embodiments of the invention, the temperature that described reduction roasting processes is 1200～1350 DEG C, and the time is 20～40
Minute.
According to a further aspect in the invention, the invention provides a kind of system implementing the aforementioned method preparing ferrum.Reference
Fig. 2, according to embodiments of the invention, this system includes: magnetizing roasting device, and magnetizing roasting device has vanadium titano-magnetite powder
Breeze outlet after entrance, carbon dust entrance, nitrogen inlet and magnetization；Mixing device, described mixing device has the ore deposit after magnetization
Breeze after powder entrance, coal powder entrance, binding agent entrance and mixture outlet, the breeze entrance after described magnetization and described magnetization
Outlet is connected；Shaped device, described shaped device has mixture inlet and pelletizing outlet, and described mixture inlet is mixed with described
Compound outlet is connected；Reduction roasting device, described reduction roasting device has pelletizing entrance and metallized pellet outlet, described ball
Group's entrance is connected with the outlet of described pelletizing；And slag sluicing system device, described slag sluicing system device have metallized pellet entrance,
Ferrum outlet and slag-drip opening, described metallized pellet entrance is connected with the outlet of described metallized pellet.
The system preparing ferrum according to embodiments of the present invention, turns due to crystal formation in V-ti Bearing Magnetite Pellets reduction process
The volumetric expansion problem become and cause, by connecting magnetizing roasting device before mixing device, magnetizes vanadium titano-magnetite powder
Calcination process, owing to the essential mineral of vanadium titano-magnetite consists of ulvite, haplotypite, titanomagnetite and perovskite etc.,
After magnetizing roasting device carries out magnetizing roast, the haplotypite in schreyerite is largely converted into titanomagnetite, usual iron mine
Stone is crystal conversion to be occurred, especially Fe in reduction process2O3To Fe3O4In reduction process, volume expands such that and causes
The generation of powder phenomenon-tion, and the schreyerite after magnetizing roast can effectively suppress due in reduction process because of crystal formation in Ore
Transformation and the volumetric expansion that produces, the schreyerite of magnetizing roast also has very good effect at aspects such as desulfurization in addition.Thus, profit
Efficiently solve pelletizing by the system of the present invention and be reduced directly the problem into the easy efflorescence of stove, the reduction efficiency of vanadium titano-magnetite
Height, effective, degree of metalization is high.
According to embodiments of the invention, magnetizing roasting device is Muffle furnace.
According to embodiments of the invention, reduction roasting device is rotary hearth furnace.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 shows the schematic flow sheet of the method preparing ferrum according to an embodiment of the invention；
Fig. 2 shows the structural representation of the system preparing ferrum according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, term " longitudinally ", " laterally ", " on ", D score, "front", "rear", "left", "right", " perpendicular
Directly ", " level ", " top ", the orientation of the instruction such as " end " or position relationship be based on orientation shown in the drawings or position relationship, be only
For the ease of describing the present invention rather than requiring that the present invention must be with specific azimuth configuration and operation, therefore it is not intended that right
The restriction of the present invention.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", " second " feature permissible
Express or implicitly include one or more this feature.Further, in describing the invention, unless otherwise saying
Bright, " multiple " are meant that two or more.
The method preparing ferrum
According to an aspect of the present invention, the invention provides a kind of method preparing ferrum.With reference to Fig. 1, according to the present invention
Embodiment, this method preparing ferrum is explained, the method includes:
S100 magnetizing roast processes
According to embodiments of the invention, vanadium titano-magnetite powder is mixed with carbon dust, carry out Roasting in a nitrogen atmosphere
Burning processes, the breeze after being magnetized.Owing to the essential mineral of vanadium titano-magnetite consists of ulvite, haplotypite, titanium magnetic
Iron mine and perovskite etc., after magnetizing roast, the haplotypite in schreyerite is largely converted into titanomagnetite, usual iron mine
Stone is crystal conversion to be occurred, especially Fe in reduction process2O3To Fe3O4In reduction process, volume expands such that and causes
The generation of powder phenomenon-tion, and the schreyerite after magnetizing roast can effectively suppress due in reduction process because of crystal formation in Ore
Transformation and the volumetric expansion that produces, the schreyerite of magnetizing roast also has very good effect at aspects such as desulfurization in addition.
According to embodiments of the invention, the granularity of vanadium titano-magnetite powder is 100 mesh～200 mesh.Thus, vanadium titano-magnetite
The particle diameter of powder is little, and specific surface area is big, and the surface area contacted with coal increases, and beneficially vanadium titano-magnetite powder magnetizing roast processes
Process with reduction roasting.
Here, illustrate term used herein " coal dust " and " carbon dust ", the Main Ingredients and Appearance of the two is identical, but with general
Logical coal dust is compared, and carbon dust fixed carbon content is high, and therefore calorific value is higher, and volatile matter, sulfur content are relatively low, and impurity is less, and quality is good.Root
According to embodiments of the invention, carbon dust can be semi-coke, coke and activated carbon.
According to embodiments of the invention, during magnetizing roast processes, vanadium titano-magnetite powder is (0.9 with the mass ratio of carbon dust
～1.2): 1.Thus, the Fe in vanadium titano-magnetite powder2O3It is reduced to Fe3O4Percent reduction high, reduction effect is good.If carbon dust
Ratio is too low, Fe2O3Cannot fully be reduced to Fe3O4, and if carbon dust ratio is too high, then Fe2O3Easily it is reduced directly to simple substance
Ferrum, is unfavorable for follow-up process.
According to embodiments of the invention, the temperature that magnetizing roast processes is 700～900 DEG C, and the time is 30～60 minutes.By
This, the magnetic efficiency of breeze is good.Such as, when magnetizing roast temperature is 700 DEG C, and roasting time is 30min, the ore deposit of about 80%
Powder can be magnetized, and when improving magnetizing roast temperature to 850 DEG C, when roasting time extends to 45min, has the breeze of more than 95%
Can be magnetized.
S200 mixing treatment
According to embodiments of the invention, the breeze after magnetization is carried out mixing treatment with coal dust and binding agent, is mixed
Thing.Thus, carry out reduction roasting process with the breeze after magnetization for raw material, alleviate the expansion efflorescence of pelletizing, reduce reaction simultaneously
Temperature, reduces reducing agent consumption in carbonaceous pelletizing, contributes to pelletizing and carry out reduction roasting process.
According to embodiments of the invention, the granularity of coal dust is not more than 1 millimeter.Thus, the particle diameter of coal dust is little, specific surface area
Greatly, increasing with the surface area of vanadium titano-magnetite powder contact, the beneficially reduction roasting of vanadium titano-magnetite powder processes.
According to embodiments of the invention, coal dust is anthracite.
According to embodiments of the invention, the quality of coal dust is (25～30) % of vanadium titano-magnetite powder quality.Thus, vanadium
In titanomagnetite powder, the efficiency of metal reduction is high, saves raw-material consumption, it is to avoid starting material left, reduces production cost, tool
There is economic benefit significantly.If the ratio of coal dust is too low, it is not enough to realize the reduction of compound in slag, it is difficult to maintain pelletizing
Reducing atmosphere around, the efficiency of metal reduction is low, and the ratio of coal is too high, then in pelletizing, sulfur content is high.
According to embodiments of the invention, the quality of binding agent accounts for (4～6) % of mixture quality.Thus, bond effect
Good, the hardness of the follow-up pelletizing obtained is suitable.
S300 forming processes
According to embodiments of the invention, it is shaped mixture processing, obtains pelletizing.Thus, mixture is formed grain
The pelletizing that footpath is suitable, it is simple to follow-up reduction roasting processes.
According to embodiments of the invention, the organic binder bond such as starch or polyvinyl alcohol selected by binding agent.Thus, bond effect
Good, the hardness of pelletizing is suitable.
According to embodiments of the invention, in molding process, water quantity control mixture quality 6～
10%.Thus, pelletizing is prone to molding, and humidity is suitable.
According to embodiments of the invention, farther including: pelletizing is carried out drying and processing, the temperature of this drying and processing is general
It is about 105 DEG C, is dried fed to boiler pelletizing moisture < 2%.Thus, the pelletizing hardness after drying is suitable, and 0.5m height is freely dropped into steel
Drop strength on plate reaches 5～8 times, and the water content of pelletizing is few, and follow-up reduction roasting processes.
S400 reduction roasting processes
According to embodiments of the invention, pelletizing is carried out reduction roasting process, obtains metallized pellet.Thus, by also
Former calcination process, the oxide of the ferrum in pelletizing is reduced to fe.
According to embodiments of the invention, the temperature that reduction roasting processes is 1200～1350 DEG C, and the time is 20～40 minutes.
Thus, the efficiency of reduction treatment is high, effective.According to a preferred embodiment of the invention, the temperature processed when reduction roasting raises
During to 1350 DEG C, retention time about 20min, reduction effect is more preferable, metallization height.
S500 slag sluicing system processes
According to embodiments of the invention, metallized pellet is carried out slag sluicing system process, obtain ferrum and waste residue.According to this
Bright embodiment, it can be that mill ore magnetic selection processes that slag sluicing system processes.
Prepare the system of ferrum
According to a further aspect in the invention, the invention provides a kind of system implementing the aforementioned method preparing ferrum.Reference
Fig. 2, according to embodiments of the invention, this system includes: magnetizing roasting device 100, mixing device 200, shaped device 300, also
Former calciner 400 and slag sluicing system device 500.Below each device is carried out specific explanations:
Magnetizing roasting device 100: according to embodiments of the invention, magnetizing roasting device 100 has vanadium titano-magnetite powder
Breeze outlet 104 after entrance 101, carbon dust entrance 102, nitrogen inlet 103 and magnetization, magnetizing roasting device 100 is by vanadium titanium magnetic
Iron mine powder mixes with carbon dust, carries out magnetizing roast process, the breeze after being magnetized in a nitrogen atmosphere.Due to v-ti magnetite
The essential mineral in ore deposit consists of ulvite, haplotypite, titanomagnetite and perovskite etc., after magnetizing roast in schreyerite
Haplotypite be largely converted into titanomagnetite, usual iron ore is crystal conversion to be occurred in reduction process, especially
Fe2O3To Fe3O4In reduction process, volume expands such that the generation causing powder phenomenon-tion, and the vanadium after magnetizing roast
Titanium ore can effectively suppress due in reduction process because of the transformation of crystal formation and the volumetric expansion that produces, magnetizing roast in addition in Ore
Schreyerite at aspects such as desulfurization, also there is very good effect.
According to embodiments of the invention, the granularity of vanadium titano-magnetite powder is 100 mesh～200 mesh.Thus, vanadium titano-magnetite
The particle diameter of powder is little, and specific surface area is big, and the surface area contacted with coal increases, and beneficially vanadium titano-magnetite powder magnetizing roast processes
Process with reduction roasting.
According to embodiments of the invention, carbon dust is semi-coke, coke, activated carbon.
According to embodiments of the invention, during magnetizing roast processes, vanadium titano-magnetite powder is (0.9 with the mass ratio of carbon dust
～1.2): 1.Thus, the Fe in vanadium titano-magnetite powder2O3It is reduced to Fe3O4Percent reduction high, reduction effect is good.If carbon dust
Ratio is too low, Fe2O3Cannot fully be reduced to Fe3O4, and if carbon dust ratio is too high, then Fe2O3Easily it is reduced directly to simple substance
Ferrum, is unfavorable for follow-up process.
According to embodiments of the invention, the temperature that magnetizing roast processes is 700～900 DEG C, and the time is 30～60 minutes.By
This, the susceptibility of breeze is high, and magnetic efficiency is good.Such as, when magnetizing roast temperature is 700 DEG C, and roasting time is 30min,
The breeze of about 80% can be magnetized, and when improving magnetizing roast temperature to 850 DEG C, when roasting time extends to 45min, has
The breeze of more than 95% can be magnetized.
Mixing device 200: according to embodiments of the invention, this mixing device 200 have the breeze entrance 201 after magnetization,
Coal powder entrance 202, binding agent entrance 203 and mixture outlet 204, wherein, the breeze entrance 201 after magnetization and the ore deposit after magnetization
Powder outlet 104 is connected, and the breeze after magnetization is carried out mixing treatment with coal dust and binding agent by this mixing device 200, is mixed
Thing.Thus, carry out reduction roasting process with the breeze after magnetization for raw material, alleviate the expansion efflorescence of pelletizing, reduce reaction simultaneously
Temperature, reduces reducing agent consumption in carbonaceous pelletizing, contributes to pelletizing and carry out reduction roasting process.
According to embodiments of the invention, the granularity of coal dust is not more than 1 millimeter.Thus, the particle diameter of coal dust is little, specific surface area
Greatly, increasing with the surface area of vanadium titano-magnetite powder contact, the beneficially reduction roasting of vanadium titano-magnetite powder processes.
According to embodiments of the invention, coal dust is anthracite.
According to embodiments of the invention, the quality of coal dust is (25～30) % of vanadium titano-magnetite powder quality.Thus, vanadium
In titanomagnetite powder, the efficiency of metal reduction is high, saves raw-material consumption, it is to avoid starting material left, reduces production cost, tool
There is economic benefit significantly.If the ratio of coal dust is too low, it is not enough to realize the reduction of compound in slag, it is difficult to maintain pelletizing
Reducing atmosphere around, the efficiency of metal reduction is low, and the ratio of coal is too high, then in pelletizing, sulfur content is high.
According to embodiments of the invention, the quality of binding agent accounts for (4～6) % of mixture quality.Thus, bond effect
Good, the hardness of the follow-up pelletizing obtained is suitable.
Shaped device 300: according to embodiments of the invention, this shaped device 300 has mixture inlet 301 and pelletizing goes out
Mouth 302, wherein, mixture inlet 301 is connected with mixture outlet 204, and mixture is shaped place by this shaped device 300
Reason, obtains pelletizing.Thus, mixture is formed the pelletizing that particle diameter is suitable, it is simple to follow-up reduction roasting processes.
According to embodiments of the invention, the organic binder bond such as starch or polyvinyl alcohol selected by binding agent.Thus, bond effect
Good, the hardness of pelletizing is suitable.
According to embodiments of the invention, in molding process, water quantity control mixture quality 6～
10%.Thus, pelletizing is prone to molding, and humidity is suitable.
According to embodiments of the invention, farther including: drying unit, this drying unit is connected with shaped device, is used for
Pelletizing is carried out drying and processing, and the temperature of this drying and processing is generally about 105 DEG C, is dried fed to boiler pelletizing moisture < 2%.By
This, the pelletizing hardness after drying is suitable, and the drop strength that 0.5m height is freely dropped on steel plate reaches 5～8 times, and the containing of pelletizing
The water yield is few, and follow-up reduction roasting processes.
Reduction roasting device 400: according to embodiments of the invention, this reduction roasting device 400 has pelletizing entrance 401 He
Metallized pellet outlet 402, wherein, pelletizing entrance 401 is connected with pelletizing outlet 302, and pelletizing is entered by this reduction roasting device 400
Row reduction roasting processes, and obtains metallized pellet.Thus, being processed by reduction roasting, the oxide of the ferrum in pelletizing is reduced to
Fe.
According to embodiments of the invention, the temperature that reduction roasting processes is 1200～1350 DEG C, and the time is 20～40 minutes.
Thus, the efficiency of reduction treatment is high, effective.According to a preferred embodiment of the invention, the temperature processed when reduction roasting raises
During to 1350 DEG C, retention time about 20min, reduction effect is more preferable, metallization height.
Slag sluicing system device 500: according to embodiments of the invention, this slag sluicing system device 500 has metallized pellet and enters
Mouth 501, ferrum outlet 502 and slag-drip opening 503, wherein, metallized pellet entrance 501 is connected with metallized pellet outlet 402, this slag
Metallized pellet is carried out slag sluicing system process by ferrum segregation apparatus 500, obtains ferrum and waste residue.
According to some embodiments of the present invention, slag sluicing system device 500 is ore mill and magnetic separator.
Below with reference to specific embodiment, the present invention will be described, it should be noted that these embodiments are only explanation
Property, and be not considered as limiting the invention.
Embodiment 1
The method utilizing the embodiment of the present invention, prepares ferrum with vanadium titano-magnetite for raw material, wherein, and the one-tenth of vanadium titano-magnetite
Point: TFe59.49%, TiO216.32%, V2O51.04%, concrete grammar is as follows:
(1) taking vanadium titano-magnetite breeze 100 parts, 100 mesh～200 purposes and account for 90%, joining carbon ratio is 1.05 to magnetize
Roasting, the temperature of magnetizing roast is 900 DEG C, and roasting time is 1h, and whole process is carried out under conditions of logical nitrogen protection atmosphere,
Schreyerite fine ore after being magnetized.
(2) the Ningxia coal using below 1mm is that dispensing carries out batch mixing pelletizing, and wherein the composition of Ningxia coal is: fixed carbon
83.59%, ash 9.08%, volatile matter 6.05%, full sulfur 0.51%.Material proportion is: schreyerite fine ore after magnetization: coal
Powder: binding agent=100:25:7, uses after mixing and roll-in ball mechanism is become pelletizing.
(3) enter rotary furnace bottom by material distributing machine after pelletizing is dried, double-layer cloth, the reduction temperature in stove 1250～
1350 DEG C, wherein 1350 DEG C of retention time about 20min, whole reduction process 40min.Degree of metalization after rotary hearth furnace reduction reaches
90.4%, pulverization rate drops to 2%.
Embodiment 2
The method utilizing the embodiment of the present invention, prepares ferrum with vanadium titano-magnetite for raw material, wherein, and Component of Vanadium Titanium Magnetite:
TFe59.49%, TiO216.32%, V2O51.04%, concrete grammar is as follows:
(1) taking vanadium titano-magnetite breeze 100 parts, 100 mesh～200 purposes and account for 90%, joining carbon ratio is 1.1 to carry out Roasting
Burning, the temperature of magnetizing roast is 950 DEG C, and roasting time is 1.5h, and whole process is carried out under conditions of logical nitrogen protection atmosphere,
Schreyerite fine ore after being magnetized.
(2) the Ningxia coal using below 1mm is that dispensing carries out batch mixing pelletizing, and wherein the composition of Ningxia coal is: fixed carbon
83.59%, ash 9.08%, volatile matter 6.05%, full sulfur 0.51%, material proportion is: schreyerite fine ore after magnetization: coal
Powder: binding agent=100:25:7, uses after mixing and roll-in ball mechanism is become pelletizing.
(3) rotary furnace bottom, double-layer cloth are entered by material distributing machine after pelletizing drying.Reduction temperature in stove is 1250
～1350 DEG C, wherein 1350 DEG C of retention time about 20min, whole reduction process 40min.Degree of metalization after rotary hearth furnace prereduction
Reaching 91.1%, pulverization rate drops to 1.5%.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
These embodiments can be carried out multiple change in the case of departing from the principle of the present invention and objective, revise, replace and modification, this
The scope of invention is limited by claim and equivalent thereof.
Claims (10)
1. the method preparing ferrum, it is characterised in that including:
Vanadium titano-magnetite powder is mixed with carbon dust, carries out magnetizing roast process in a nitrogen atmosphere, in order to after being magnetized
Breeze；
Breeze after described magnetization is carried out mixing treatment with coal dust and binding agent, in order to obtain mixture；
It is shaped described mixture processing, in order to obtain pelletizing；
Described pelletizing is carried out reduction roasting process, in order to obtain metallized pellet；And
Described metallized pellet is carried out slag sluicing system process, in order to obtain ferrum and waste residue.
Method the most according to claim 1, it is characterised in that the granularity of described vanadium titano-magnetite powder is 100 mesh～200
Mesh.
Method the most according to claim 1, it is characterised in that during described magnetizing roast processes, described v-ti magnetite breeze
Last is (0.9～1.2) with described carbon dust mass ratio: 1.
Method the most according to claim 1, it is characterised in that the temperature that described magnetizing roast processes is 700～900 DEG C,
Time is 30～60 minutes.
Method the most according to claim 1, it is characterised in that the granularity of described coal dust is not more than 1 millimeter.
Method the most according to claim 1, it is characterised in that the quality of described coal dust is described vanadium titano-magnetite powder matter
(25～30) % of amount.
Method the most according to claim 1, it is characterised in that the quality of described binding agent accounts for (the 4 of described mixture quality
～6) %.
Method the most according to claim 1, it is characterised in that the temperature that described reduction roasting processes is 1200～1350
DEG C, the time is 20～40 minutes.
9. the system implementing to prepare the method for ferrum described in any one of claim 1～8, it is characterised in that including:
Magnetizing roasting device, described magnetizing roasting device has vanadium titano-magnetite powdering inlet, carbon dust entrance, nitrogen inlet and magnetic
Breeze outlet after change；
Mixing device, breeze entrance, coal powder entrance, binding agent entrance and mixture after described mixing device has magnetization go out
Mouthful, the breeze entrance after described magnetization exports with the breeze after described magnetization and is connected；
Shaped device, described shaped device has mixture inlet and pelletizing outlet, described mixture inlet and described mixture
Outlet is connected；
Reduction roasting device, described reduction roasting device have pelletizing entrance and metallized pellet outlet, described pelletizing entrance with
The outlet of described pelletizing is connected；And
Slag sluicing system device, described slag sluicing system device has metallized pellet entrance, ferrum outlet and slag-drip opening, described metallization
Pelletizing entrance is connected with the outlet of described metallized pellet.
System the most according to claim 9, it is characterised in that described magnetizing roasting device is Muffle furnace,
Optionally, described reduction roasting device is rotary hearth furnace.
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