CN106906355B - The preparation method of shaft furnace vanadium titano-magnetite acid pellet - Google Patents
The preparation method of shaft furnace vanadium titano-magnetite acid pellet Download PDFInfo
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- CN106906355B CN106906355B CN201710099933.4A CN201710099933A CN106906355B CN 106906355 B CN106906355 B CN 106906355B CN 201710099933 A CN201710099933 A CN 201710099933A CN 106906355 B CN106906355 B CN 106906355B
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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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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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
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
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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
- 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
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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Abstract
The invention discloses the shaft furnace preparation methods of vanadium titano-magnetite acid pellet, including：Fine Concentrates of V-ti-bearing Magnetite is mixed with bentonite, to obtain the first mixed material；A part in first mixed material is mixed with sodium carbonate and water, to obtain the second mixed material；Second mixed material is subjected to the first pelletizing processing, to obtain mother bulb；Another part in first mixed material is mixed with water, to obtain balling-up material；The mother bulb with the balling-up material mix and the second pelletizing is handled, so that the balling-up material is wrapped up the mother bulb, to obtain V-ti Bearing Magnetite Pellets；And the V-ti Bearing Magnetite Pellets are dried and oxidizing roasting, to obtain shaft furnace vanadium titano-magnetite acid pellet.It can solve the problems, such as that single all-sefstromite concentrate prepares shaft furnace V-ti Bearing Magnetite Pellets gas base directly reducing difficulty using this method, and effectively reduce production cost, guarantee is provided for the operation of shaft furnace economization.
Description
Technical field
The invention belongs to metallurgical technology fields, specifically, the present invention relates to shaft furnace vanadium titano-magnetite acid pellets
Preparation method.
Background technology
Vanadium titano-magnetite is a kind of iron content, titanium, based on vanadium and to be associated with a small amount of chromium, nickel, cobalt, platinum family, scandium etc. a variety of can be comprehensive
The mineral using component are closed, there is high utility value.Utilize existing mineral processing method and traditional " sintering-blast furnace
The titanium slag grade that smelting-vanadium extraction by converter blowing-semi-steel making " smelting process flow is obtained is low, and hardly possible realizes valuable group of iron, vanadium, titanium etc.
The efficient recycling of member, and gas-based shaft kiln directly reduced process schreyerite is with flow is short, resource utilization is high, pollution
Small, the advantages that product is high-quality, has certain technical advantage in terms of Metallurgical resources comprehensive utilization.But it is shaft kiln directly reduced simultaneously
More stringent requirements are proposed to full vanadium titanium globe compression strength, pulverization rate, the porosity and reduction degree etc. for schreyerite.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose a kind of preparation method of shaft furnace vanadium titano-magnetite acid pellet, be can effectively solve the problem that using this method
The problem of single all-sefstromite concentrate pelletizing difficulty reduces the manufacturing cost of pelletizing, improves pellet quality, and shaft furnace uses the vanadium titanium
Mine pelletizing carry out production the working of a furnace it is smooth, energy consumption it is low, economic and technical norms can be further improved.
According to an aspect of the present invention, the present invention proposes the preparation method of shaft furnace vanadium titano-magnetite acid pellet,
According to an embodiment of the invention, this method includes：
(1) Fine Concentrates of V-ti-bearing Magnetite is mixed with bentonite, to obtain the first mixed material；
(2) part in first mixed material is mixed with sodium carbonate and water, to obtain the second mixing
Material；
(3) second mixed material is subjected to the first pelletizing processing, to obtain mother bulb；
(4) another part in first mixed material is mixed with water, to obtain balling-up material；
(5) mother bulb with the balling-up material mix and the second pelletizing is handled, the balling-up material is made to wrap up
The mother bulb, to obtain V-ti Bearing Magnetite Pellets；And
(6) V-ti Bearing Magnetite Pellets are dried and oxidizing roasting, to obtain shaft furnace vanadium titano-magnetite oxygen
Pellet.
The preparation method of shaft furnace according to the ... of the embodiment of the present invention vanadium titano-magnetite acid pellet as a result, by v-ti magnetite
Mine concentrate powder is mixed with bentonite and the mixed material is divided into two parts, and a part is mixed simultaneously with sodium carbonate and water
It is used to prepare mother bulb, another part is mixed with water and mixed with mother bulb to prepare vanadium titano-magnetite in the second pelletizing processing procedure
Pelletizing, is finally dried V-ti Bearing Magnetite Pellets and oxidizing roasting is handled, and obtains shaft furnace vanadium titano-magnetite acid pellet.
The preparation method of shaft furnace according to the above embodiment of the present invention vanadium titano-magnetite acid pellet, when preparing the second mixed material
A certain amount of sodium carbonate is added, the reduction of ferriferous oxide inside pelletizing is conducive to, promote pelletizing degree of metalization and ball will not be caused
The dusting of group, undesirable extention, pellet strength is high after reduction, there is the direct motion of the interests working of a furnace.In addition, the present invention is with full vanadium titano-magnetite
Based on concentrate, shaft furnace vanadium titano-magnetite acid pellet, adaptability to raw material are prepared with addition of a certain amount of bentonite, sodium carbonate and water
Extensively, and the shaft furnace prepared is high with vanadium titano-magnetite acid pellet compression strength, the porosity is reasonable, can preferably meet shaft furnace use
The standard of pelletizing not only solves the problem that shaft furnace V-ti Bearing Magnetite Pellets difficulty is prepared using single all-sefstromite concentrate,
Production cost is also effectively reduced, guarantee is provided for the operation of shaft furnace economization.
It, can be in addition, preparation method of the shaft furnace according to the above embodiment of the present invention with vanadium titano-magnetite acid pellet
With following additional technical characteristic：
According to some embodiments of the present invention, the part in the first mixed material accounts for the 10-25 weights of the first mixed material
% is measured, another part in the first mixed material accounts for the 75-90 weight % of the first mixed material.
According to some embodiments of the present invention, bentonitic addition is the 1-2.5 weight % of Fine Concentrates of V-ti-bearing Magnetite.
According to some embodiments of the present invention, the addition of sodium carbonate is the 1-2.5 weights of the part in the first mixture
Measure %.
According to some embodiments of the present invention, the water content of the second mixed material is 2-3 weight %.
According to some embodiments of the present invention, the water content of balling-up material is 6-9 weight %.
The preparation method of shaft furnace according to the ... of the embodiment of the present invention vanadium titano-magnetite acid pellet, the first pelletizing processing in into
One step includes that water is added with atomised form into the second mixed material.
According to some embodiments of the present invention, the average grain diameter of mother bulb is 3-5 millimeters.
According to some embodiments of the present invention, the average grain diameter of V-ti Bearing Magnetite Pellets is 8-16 millimeters.
According to some embodiments of the present invention, further comprise：
(7) screening process is carried out to V-ti Bearing Magnetite Pellets before step (6), is less than 8 millimeters to isolate grain size
And/or the material more than 16 millimeters, it is mixed after drying fine grinding and with the first mixed material；
(8) in step (6), it is thin that material of the grain size less than 8 millimeters and/or more than 16 millimeters will be isolated after drying
It is mixed after mill and with the first mixed material.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the preparation method of shaft furnace vanadium titano-magnetite acid pellet according to an embodiment of the invention；
Fig. 2 is the preparation method according to the shaft furnace vanadium titano-magnetite acid pellet of another embodiment of the invention；
Fig. 3 is the preparation method according to the shaft furnace vanadium titano-magnetite acid pellet of further embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
According to an aspect of the present invention, the present invention proposes the preparation method of shaft furnace vanadium titano-magnetite acid pellet,
According to an embodiment of the invention, this method includes：
Fine Concentrates of V-ti-bearing Magnetite is mixed with bentonite, to obtain the first mixed material；
A part in first mixed material is mixed with sodium carbonate and water, to obtain the second mixture
Material；
Second mixed material is subjected to the first pelletizing processing, to obtain mother bulb；
Another part in first mixed material is mixed with water, to obtain balling-up material；
The mother bulb with the balling-up material mix and the second pelletizing is handled, is made described in the balling-up material package
Mother bulb, to obtain V-ti Bearing Magnetite Pellets；And
The V-ti Bearing Magnetite Pellets are dried and oxidizing roasting, ball is aoxidized to obtain shaft furnace vanadium titano-magnetite
Group.
The preparation method of shaft furnace according to the ... of the embodiment of the present invention vanadium titano-magnetite acid pellet as a result, by v-ti magnetite
Mine concentrate powder is mixed with bentonite and the mixed material is divided into two parts, and a part is mixed simultaneously with sodium carbonate and water
It is used to prepare mother bulb, another part is mixed with water and mixed with mother bulb to prepare vanadium titano-magnetite in the second pelletizing processing procedure
Pelletizing, is finally dried V-ti Bearing Magnetite Pellets and oxidizing roasting is handled, and obtains shaft furnace vanadium titano-magnetite acid pellet.
The preparation method of shaft furnace according to the above embodiment of the present invention vanadium titano-magnetite acid pellet is preparing the second mixed material
A certain amount of sodium carbonate of Shi Tianjia is conducive to the reduction of ferriferous oxide inside pelletizing, promotes pelletizing degree of metalization and will not cause
The dusting of pelletizing, pellet strength is high after reduction, there is the direct motion of the interests working of a furnace.In addition, the present invention is with full vanadium titano-magnetite concentrate
It is main, shaft furnace vanadium titano-magnetite acid pellet is prepared with addition of a certain amount of bentonite, sodium carbonate and water, adaptability to raw material is wide, and
The shaft furnace prepared is high with vanadium titano-magnetite acid pellet compression strength, the porosity is reasonable, can preferably meet shaft furnace pelletizing
Standard, not only solve and the problem of shaft furnace V-ti Bearing Magnetite Pellets difficulty prepared using single all-sefstromite concentrate, also
Effect reduces production cost, and guarantee is provided for the operation of shaft furnace economization.
The method for preparing acid pellet below according to the above embodiment of the present invention is described in detail, with reference to figure 1-3, the party
Method includes：
S100：Prepare the first mixed material
According to an embodiment of the invention, Fine Concentrates of V-ti-bearing Magnetite is mixed with bentonite first, to obtain first
Mixed material.
According to a particular embodiment of the invention, the mode that Fine Concentrates of V-ti-bearing Magnetite is mixed with bentonite can be dry
It is mixed, it is possible thereby to further increase Fine Concentrates of V-ti-bearing Magnetite and bentonitic mixture homogeneity.Inventor has found, according to wet
Mixed mode can play cementation after bentonite water suction, and then while being mixed with Fine Concentrates of V-ti-bearing Magnetite is easy to form pelletizing,
It is mixed with Fine Concentrates of V-ti-bearing Magnetite so as to cause bentonite uneven, influences the quality for subsequently preparing pelletizing material.Lead to as a result,
It crosses and Fine Concentrates of V-ti-bearing Magnetite and bentonite is subjected to the dry-mixed distribution that can make bentonite in Fine Concentrates of V-ti-bearing Magnetite
More uniformly.
According to a particular embodiment of the invention, bentonitic addition is the 1-2.5 weight % of Fine Concentrates of V-ti-bearing Magnetite.
As the binder for preparing pelletizing, inventor has found bentonite, when bentonitic additive amount is excessive, can cause vanadium titano-magnetite ball
Group's deformation, reduction V-ti Bearing Magnetite Pellets yield and grade, and the very few V-ti Bearing Magnetite Pellets intensity prepared of additive amount
It is poor.The 1-2.5 weight % that bentonitic addition is Fine Concentrates of V-ti-bearing Magnetite are controlled as a result, can both be effectively improved vanadium
The balling property of titanomagnetite concentrate powder, and the intensity of V-ti Bearing Magnetite Pellets can be improved.In addition, the present invention is by controlling swelling
Content of powder of the grain size less than 74 microns is not less than 95 weight % in soil, can effectively improve bentonite and divide in mixed material
The uniformity of cloth.Inventor also found, is dried to it before using Fine Concentrates of V-ti-bearing Magnetite, moistens mill processing, control
Content of powder of the grain size less than 74 microns is not less than 70 weight % in Fine Concentrates of V-ti-bearing Magnetite, can significantly improve v-ti magnetite
Mine concentrate powder and bentonitic contact area, meanwhile, it can also increase the tightness degree between mixed material, be conducive to enhance pelletizing
Intensity.
S200：Prepare the second mixed material
According to an embodiment of the invention, the first mixed material is divided into two parts, wherein one in the first mixed material
Divide and mixed with sodium carbonate and water, to obtain the second mixed material.
As a result, by adding a certain amount of sodium carbonate when preparing the second mixed material, be conducive to vanadium titano-magnetite oxidation
The reduction of ferriferous oxide inside pelletizing promotes pelletizing degree of metalization and will not cause the dusting of pelletizing, and pellet strength is high after reduction,
There is the direct motion of the interests working of a furnace.
According to a particular embodiment of the invention, the part in the first mixed material accounts for the 10- of first mixed material
25 weight %.In the present invention, the first mixed material is divided into two parts, wherein by the part and carbon in the first mixed material
Sour sodium and water are mixed, and obtain the second mixed material, and handle to prepare mother bulb for the first pelletizing；By the first mixed material
In another part mixed with water, obtain balling-up material, and in the processing of the second pelletizing, ball-type being made to grow up.Wherein, exist
Material feeding is less in first pelletizing processing procedure, and material feeding is more in the second pelletizing processing procedure, controls first in the present invention as a result,
A part in mixed material accounts for the 10-25 weight % of first mixed material, can effectively improve raw material availability, keep away
Exempt from wastage of material.
According to a particular embodiment of the invention, the addition of sodium carbonate is the 1-2.5 weights of the part in the first mixture
Measure %.Inventor has found, adds a certain amount of sodium carbonate when preparing the second mixed material, vanadium titano-magnetite can be promoted to aoxidize
The reduction of ferriferous oxide inside pelletizing promotes pelletizing degree of metalization and will not cause the dusting of pelletizing, and pellet strength is high after reduction,
There is the direct motion of the interests working of a furnace.And sodium carbonate addition can excessively reduce the quality of V-ti Bearing Magnetite Pellets, addition is very few and not
It is enough to improve the reduction rate of acid pellet and degree of metalization, it is difficult to play its useful effect.As a result, by controlling carbon in the present invention
The addition of sour sodium is the 1-2.5 weight % of the part in the first mixture, can effectively improve vanadium titano-magnetite oxidation
The reduction rate and degree of metalization of pelletizing, and ensure the intensity after the reduction of vanadium titano-magnetite acid pellet.
According to a particular embodiment of the invention, the water content of the second mixed material is 2-3 weight %.Thus, it is possible to ensure
The independence of Fine Concentrates of V-ti-bearing Magnetite particle when preparing mother bulb, promotes the formation of single ball.
S300：The processing of first pelletizing
According to an embodiment of the invention, the second mixed material is subjected to the first pelletizing processing, to obtain mother bulb.
Disc balling machine progress may be used in specific example according to the present invention, pelletizing processing.It is according to the present invention specific
Embodiment, the processing of the first pelletizing further comprise that water is added with atomised form into the second mixed material.Inventor's discovery,
First pelletizing processing prepares mother bulb process initial stage, and material moisture is relatively low, and material feeding is less, and water is supplemented by being atomized water supply way
Point, fine ore can be made to form single ball under the action of mechanical force and capillary force, and gradually grow up, the present invention passes through as a result,
Atomization plus water can effectively improve the balling-up efficiency in mother bulb preparation process in the first pelletizing processing procedure.In addition, according to this
The average grain diameter of the specific embodiment of invention, mother bulb is 3-5 millimeters.During the first pelletizing processing prepares mother bulb, work as mother bulb
Size discharges when reaching 3-5 millimeters.
S400：Prepare balling-up material
According to an embodiment of the invention, another part in the first mixed material is mixed with water, to obtain into
Ball material, and so that ball-type is grown up for package mother bulb in the second pelletizing processing procedure, V-ti Bearing Magnetite Pellets are prepared as a result,.
According to a particular embodiment of the invention, another part in the first mixed material accounts for the 75-90 of the first mixed material
Weight %.In the present invention, the first mixed material is divided into two parts, wherein by the part and carbonic acid in the first mixed material
Sodium and water are mixed, and obtain the second mixed material, and handle to prepare mother bulb for the first pelletizing；It will be in the first mixed material
Another part mixed with water, obtain balling-up material, and in the processing of the second pelletizing, ball-type being made to grow up.Wherein,
Material feeding is less in one pelletizing processing procedure, and material feeding is more in the second pelletizing processing procedure, passes through control the in the present invention as a result,
Another part in one mixed material accounts for the 75-90 weight % of first mixed material, can effectively improve raw material utilization
Rate avoids wastage of material.
According to a particular embodiment of the invention, the water content of balling-up material is 6-9 weight %.Enter after mother bulb discharging and prepares
In the V-ti Bearing Magnetite Pellets stage, this stage material feeding is more, and ball-type growth rate is fast, and inventor has found, the balling-up object of high-moisture
Material can rely on adhesive force, cohesive force and the mechanical force between solid-liquid so that pellet strength rises.In addition, outer layer high-moisture
During the drying process, moisture evaporation forms uniform, porous channel to material, can also be hot-air in subsequent oxidation roasting process
Channel is provided inside into pelletizing, is conducive to Fe in pelletizing2O3Crystal stock, the formation of crystal brige and pellet strength increase.It controls as a result,
The water content of balling-up material is 6-9 weight %, is smoothed out with can effectively facilitating the processing of the second pelletizing.
S500：The processing of second pelletizing
According to an embodiment of the invention, mother bulb with balling-up material mix and the second pelletizing is handled, to obtain vanadium
Titanomagnetite pelletizing.
According to a particular embodiment of the invention, mother bulb discharging entered for the second pelletizing processing stage, in this stage, material feeding compared with
More, ball-type growth rate is fast, and inventor has found, the adhesive force, interior between solid-liquid can be relied on addition of the balling-up material of high-moisture
Poly- power and mechanical force so that pellet strength rises.In addition, outer layer high-moisture material is during the drying process, and moisture evaporation, shape
At uniform, porous channel, it can also enter for hot-air in subsequent oxidation roasting process and channel is provided inside pelletizing, be conducive to ball
Fe in group2O3Crystal stock, the formation of crystal brige and pellet strength increase, as a result, the present invention by the second pelletizing processing procedure with addition of
The balling-up material of high-moisture is smoothed out in which can effectively facilitate the processing of the second pelletizing.In addition, according to the present invention specific
Embodiment only need to carry out atomization plus water in the first pelletizing processing stage, volume external adding water not needed in the second pelletizing processing procedure,
The time for effectively shortening atomization plus water as a result, improve production efficiency.According to a particular embodiment of the invention, v-ti magnetite
The average grain diameter of mine pelletizing is 8-16 millimeters.
S600：It is dried and oxidizing roasting is handled
According to an embodiment of the invention, processing is dried to V-ti Bearing Magnetite Pellets and oxidizing roasting is handled, so as to
To shaft furnace vanadium titano-magnetite acid pellet.
According to a particular embodiment of the invention, by the way that V-ti Bearing Magnetite Pellets are dried at processing and oxidizing roasting
Reason, while the temperature and time for controlling drying and oxidizing roasting obtains qualified vanadium titano-magnetite as a result, in predetermined range
Acid pellet, wherein according to a particular embodiment of the invention, the condition of drying and processing can be：150-300 degrees Celsius of wind-warm syndrome；
Oxidizing roasting condition can be：Preheating temperature is 900-950 degrees Celsius, and soaking time is 15-25 minutes, calcination temperature 1100-
1300 degrees Celsius, keep the temperature 15-25 minutes.
Further comprised before processing and oxidizing roasting processing is dried according to the specific embodiment of the invention：To institute
It states V-ti Bearing Magnetite Pellets and carries out screening process, to isolate material of the grain size less than 8 millimeters and/or more than 16 millimeters, warp
It is mixed with first mixed material after drying fine grinding；Grain size will be isolated after the drying less than 8 millimeters and/or will be more than
It is mixed after 16 millimeters of material fine grinding and with first mixed material.Thus, it is possible to realize the recycling to unqualified pelletizing again
It utilizes, further increases the utilization rate of raw material.
According to the specific embodiment of the invention, the method for preparing vanadium titano-magnetite acid pellet of above-described embodiment is specifically wrapped
It includes：
1. pair Fine Concentrates of V-ti-bearing Magnetite carries out profit mill, drying and processing, it is desirable that grain size is less than in Fine Concentrates of V-ti-bearing Magnetite
74 microns of content of powder is not less than 70 weight %.
2. binder is general pelletizing bentonite.
3. by Fine Concentrates of V-ti-bearing Magnetite and bentonite, according to predetermined ratio mixing, (bentonitic addition is v-ti magnetite
The 1-2.5 weight % of mine concentrate powder and bentonitic mixed material), first carry out it is dry-mixed, to obtain the first mixed material, by batch mixing
First mixed material is divided into two parts, wherein the first mixed material by intensity different adjustment mixing time after batch mixing is uniform
A part account for the 10-25 weight % of the first mixed material, another part of the first mixed material accounts for the 75- of the first mixed material
90 weight %, the sodium carbonate with addition of 1-2.5 weight % and a certain amount of water, are used in a part for the first mixed material
The water content for preparing mother bulb is the second mixed material of 2-3 weight %, with addition of certain in another part of the first mixed material
The water of amount, the balling-up material that the water content for obtaining growing up for pelletizing later stage ball-type is 6-9 weight %.Wet mixing is necessary to ensure that mixing
The uniformity of moisture in material.
5. carrying out pelletizing on disc balling machine according to a conventional method, the rotational frequency of disc balling machine is 3000Hz, inclination angle
For 30-45 degree, Balling time is 15-25 minutes.Pelletizing initial stage prepares mother bulb, pelletizing with the second mixed material of low water content
When kept the skin wet by being atomized water supply way, mother bulb size discharges when reaching 3-5 millimeter, and mother bulb is made through belt feeder into next
Ball disk, during ball-type is grown up, with addition of high-moisture balling-up material pelletizing, this stage need not be outer with addition of water, vanadium titanium magnetic
Iron ore pellets diameter control ensures the water content of V-ti Bearing Magnetite Pellets in 7-8 weight % at 8-16 millimeters.
6. after pelletizing, carrying out screening process to V-ti Bearing Magnetite Pellets, 8-16 millimeters of pelletizings are certified products, into baking
Mainstream journey, unqualified pelletizing return to blending bunker after processing, again pelletizing.V-ti Bearing Magnetite Pellets drying and processing uses air blast
Drying, temperature are scheduled on 150-300 degrees Celsius.
7. the V-ti Bearing Magnetite Pellets after drying enter preheating, oxidizing roasting stage, 900-950 degrees Celsius of preheating temperature,
Heat preservation 15-25 minutes, 1100-1300 degrees Celsius of calcination temperature keep the temperature 15-25 minutes.
The preparation method of the above embodiment of the present invention shaft furnace vanadium titano-magnetite acid pellet as a result, can at least reach
One of following effect：
1. adding a certain amount of sodium carbonate when preparing the second mixed material, be conducive to going back for pelletizing inside ferriferous oxide
Original promotes pelletizing degree of metalization and will not cause the dusting of pelletizing, and pellet strength is high after reduction, there is the direct motion of the interests working of a furnace.
2. carrying out atomization plus water in the first pelletizing processing stage, volume external adding water is not needed in the second pelletizing processing procedure,
The time for effectively shortening atomization plus water, improve production efficiency.
3. based on full vanadium titano-magnetite concentrate, shaft furnace vanadium titanium is prepared with addition of a small amount of bentonite, sodium carbonate and water
Magnetic iron ore acid pellet, adaptability to raw material is wide, effectively reduces production cost.
4. the present invention prepares shaft furnace and is carried out in two steps with vanadium titano-magnetite acid pellet, use the second of low water content mixed first
Close material prepare mother bulb, then mother bulb enter prepare the V-ti Bearing Magnetite Pellets stage be added high-moisture balling-up material be used for
Ball-type is grown up, by using this method for preparing shaft furnace vanadium titano-magnetite acid pellet so that the v-ti magnetite prepared
Mine acid pellet has many advantages, such as that compression strength is high, the porosity is reasonable, can preferably meet the standard of shaft furnace pelletizing.
5. solving the problems, such as to prepare vanadium titano-magnetite Shaft Furnace Pelletizing Process difficulty using single all-sefstromite concentrate, and drop
Low production cost provides guarantee for the operation of shaft furnace economization.
Embodiment 1
1, Fine Concentrates of V-ti-bearing Magnetite 10Kg is taken, its ingredient and granularity are analyzed, as a result as shown in Table 1 and Table 2, is contained
Water is 0.
The main component of 1 Fine Concentrates of V-ti-bearing Magnetite of table/weight %
| TFe | FeO | V2O5 | TiO2 | SiO2 | CaO | MgO | Al2O3 | S | P |
| 57.22 | 27.5 | 0.498 | 7.77 | 1.57 | 1.01 | 1.00 | 2.09 | 0.049 | 0.058 |
The size distribution of 2 Fine Concentrates of V-ti-bearing Magnetite of table
| Grade/mm | +0.15 | -0.15-+0.10 | -0.10-+0.074 | -0.074-+0.045 | -0.074 | -0.045 |
| Content/weight % | 0.8 | 2.4 | 17.6 | 48.7 | 79.2 | 30.5 |
Take bentonite 0.12Kg (with the 1.2 weight % that dosage is vanadium titano-magnetite quality), main component such as 3 institute of table
Show.
3 bentonitic main component of table/weight %
2. Fine Concentrates of V-ti-bearing Magnetite and bentonite progress is dry-mixed, material obtains the first mixed material after mixing,
First mixed material is divided into two parts, a part of 1.012Kg (10 weight %) of the first mixed material, the first mixed material
The water of 10.12g sodium carbonate, 30.4g are added into a part for the first mixed material by another part 9.108Kg (90 weight %)
The second mixed material is obtained, the water that 637g is added to another part of the first mixed material obtains balling-up material, respectively mixing.
3. using disc balling machine pelletizing, the rotational frequency of disc balling machine is 3000Hz, and inclination angle is 45 degree, Balling time one
Totally 20 minutes.Pelletizing initial stage manufactures mother bulb with the second low mixed material of water content, during preparing mother bulb, passes through mist
Change the water for adding the mode of water that 40.5g is added, discharges when mother bulb size reaches 3-5 millimeters.Mother bulb discharging enters into through belt feeder
Ball is grown up in balling disk (-sc), this stage is with addition of high-moisture balling-up material pelletizing, until pelletizing diameter reaches 8-16 millimeters, ball at this time
The water content of group is 7 weight %.
4. after pelletizing, being sieved to pelletizing, 8-16 millimeters of qualified V-ti Bearing Magnetite Pellets are carried out at drying
Reason, 150-250 degrees Celsius of wind-warm syndrome, 40 minutes time.
5. the pelletizing after pair drying carries out oxidizing roasting processing, 900 degrees Celsius of preheating temperature, 20 minutes time, roasting temperature
1250 degrees Celsius of degree, 15 minutes time.
6. cooling, cooling method is air-cooled or air-cooled.It is 2637N ＞ that pelletizing after cooling, which measures its compression strength,
2000N, the porosity 18% fully meet Shaft Furnace Pelletizing Process and enter stove requirement.
Wherein, vanadium titano-magnetite acid pellet ingredient is as shown in table 4.
4 vanadium titano-magnetite acid pellet ingredient of table/weight %
| TFe | CaO | MgO | SiO2 | Al2O3 | V2O5 | TiO2 | Na2O | K2O | R |
| 55.66 | 1.00 | 1.07 | 6.44 | 2.56 | 0.486 | 7.43 | 0.279 | 0.128 | 0.16 |
Embodiment 2
1, Fine Concentrates of V-ti-bearing Magnetite 10Kg is taken, its ingredient and granularity are analyzed, as a result as shown in table 5 and table 6, is contained
Water is 0.
The main component of 5 Fine Concentrates of V-ti-bearing Magnetite of table/weight %
| TFe | FeO | V2O5 | TiO2 | SiO2 | CaO | MgO | Al2O3 | S | P |
| 67.29 | 27.5 | 0.546 | 1.47 | 1.57 | 0.66 | 0.51 | 0.83 | 0.001 | 0.006 |
The size distribution of 6 Fine Concentrates of V-ti-bearing Magnetite of table
| Grade/mm | +0.15 | - 0.15~+0.10 | - 0.10~+0.074 | -0.074-+0.045 | -0.074 | -0.045 |
| Content/weight % | 2.04 | 4.28 | 3.35 | 42.00 | 90.33 | 48.33 |
Take bentonite 0.12Kg (with the 1.2 weight % that dosage is vanadium titano-magnetite quality), main component such as 7 institute of table
Show.
7 bentonitic main component of table/weight %
2. Fine Concentrates of V-ti-bearing Magnetite and bentonite progress is dry-mixed, material obtains the first mixed material after mixing,
First mixed material is divided into two parts, a part of 1.012Kg (10 weight %) of the first mixed material, the first mixed material
The water of 10.12g sodium carbonate and 30.4g is added into a part for the first mixed material by another part 9.108Kg (90 weight %)
The second mixed material is obtained, the water that 637g is added into another part of the first mixed material obtains balling-up material, respectively mixing.
3. using disc balling machine pelletizing, the rotational frequency of disc balling machine is 3000Hz, and inclination angle is 45 degree, Balling time one
Totally 20 minutes.Pelletizing initial stage manufactures mother bulb with the second low mixed material of water content, during preparing mother bulb, passes through mist
Change the water for adding the mode of water that 40.5g is added, discharges when mother bulb size reaches 3-5 millimeters.Mother bulb discharging enters into through belt feeder
Ball is grown up in balling disk (-sc), this stage is with addition of high-moisture balling-up material pelletizing, until pelletizing diameter reaches 8-16 millimeters, ball at this time
The water content of group is 7 weight %.
4. after pelletizing, being sieved to pelletizing, 8-16 millimeters of qualified V-ti Bearing Magnetite Pellets are carried out at drying
Reason, 200-250 degrees Celsius of wind-warm syndrome, 40 minutes time.
5. the pelletizing after pair drying carries out oxidizing roasting processing, 900 degrees Celsius of preheating temperature, 20 minutes time, roasting temperature
1250 degrees Celsius of degree, 15 minutes time.
6. cooling, cooling method is air-cooled or air-cooled.It is 2896N ＞ that pelletizing after cooling, which measures its compression strength,
2000N, the porosity 16.8% fully meet Shaft Furnace Pelletizing Process and enter stove requirement.
Wherein, vanadium titano-magnetite acid pellet ingredient is as shown in table 8.
8 vanadium titano-magnetite acid pellet ingredient of table/weight %
| TFe | FeO | SiO2 | Al2O3 | CaO | MgO | V2O5 | TiO2 | Na2O | P | S |
| 64.92 | 0.86 | 1.65 | 0.90 | 0.72 | 0.54 | 0.524 | 1.430 | 0.279 | 0.008 | 0.002 |
Embodiment 3
1, Fine Concentrates of V-ti-bearing Magnetite 10Kg is taken, its ingredient and granularity are analyzed, as a result as shown in Table 9 and Table 10,
Water content is 0.
The main component of 9 Fine Concentrates of V-ti-bearing Magnetite of table/weight %
| TFe | FeO | V2O5 | TiO2 | SiO2 | CaO | MgO | Al2O3 | S | P | MnO | Cr2O3 |
| 54.16 | 9.91 | 0.815 | 16.16 | 1.69 | 0.36 | 0.86 | 3.25 | 0.01 | 0.01 | 0.26 | 0.24 |
The size distribution of 10 Fine Concentrates of V-ti-bearing Magnetite of table
Bentonite 0.2Kg (with the 2 weight % that dosage is vanadium titano-magnetite quality) is taken, main component is as shown in table 11.
11 bentonitic main component of table/weight %
2. dry-mixed to material progress, material obtains the first mixed material after mixing, and the first mixed material is divided into two
Part, a part of 1.53Kg (15 weight %) of the first mixed material, another part 8.67Kg (85 weights of the first mixed material
Measure %), 15.30g sodium carbonate is added into a part for the first mixed material and the water of 30.6g obtains the second mixed material, to
The water that 693.6g is added in another part of first mixed material obtains balling-up material, respectively mixing.
3. using disc balling machine pelletizing, the rotational frequency of disc balling machine is 3000Hz, and inclination angle is 45 degree, Balling time one
Totally 20 minutes.Pelletizing initial stage manufactures mother bulb with the second low mixed material of water content, during preparing mother bulb, passes through mist
Change the water for adding the mode of water that 61.2g is added, discharges when mother bulb size reaches 3-5 millimeters.Mother bulb discharging enters into through belt feeder
Ball is grown up in balling disk (-sc), this stage is with addition of high-moisture balling-up material pelletizing, until pelletizing diameter reaches 8-16 millimeters, ball at this time
The water content of group is 7.7 weight %.
4. after pelletizing, being sieved to pelletizing, 8-16 millimeters of qualified V-ti Bearing Magnetite Pellets are carried out at drying
Reason, 200-250 degrees Celsius of wind-warm syndrome, 40 minutes time.
5. the pelletizing after pair drying carries out oxidizing roasting processing, 900 degrees Celsius of preheating temperature, 20 minutes time, roasting temperature
1250 degrees Celsius of degree, 15 minutes time.
6. cooling, cooling method is air-cooled or air-cooled.It is 3200N ＞ that pelletizing after cooling, which measures its compression strength,
2000N, the porosity 17.4% fully meet Shaft Furnace Pelletizing Process and enter stove requirement.
Wherein, vanadium titano-magnetite acid pellet ingredient is as shown in table 12.
12 vanadium titano-magnetite acid pellet ingredient of table/weight %
| TFe | FeO | SiO2 | Al2O3 | CaO | MgO | V2O5 | TiO2 | Na2O | P | S | MnO | Cr2O3 |
| 53.00 | 0.29 | 2.69 | 3.25 | 0.37 | 0.86 | 0.793 | 15.73 | 0.286 | 0.004 | 0.008 | 0.259 | 0.233 |
Embodiment 4
1, Fine Concentrates of V-ti-bearing Magnetite 10Kg is taken, its ingredient and granularity are analyzed, as a result as shown in table 13 and table 14,
Water content is 0.
The main component of 13 Fine Concentrates of V-ti-bearing Magnetite of table/weight %
| TFe | FeO | V2O5 | TiO2 | SiO2 | CaO | MgO | Al2O3 | S | P |
| 57.22 | 27.5 | 0.498 | 7.77 | 1.57 | 1.01 | 1.00 | 2.09 | 0.049 | 0.058 |
The size distribution of 14 Fine Concentrates of V-ti-bearing Magnetite of table
| Grade/mm | +0.15 | -0.15-+0.10 | -0.10-+0.074 | -0.074-+0.045 | -0.074 | -0.045 |
| Content/weight % | 0.8 | 2.4 | 17.6 | 48.7 | 79.2 | 30.5 |
Bentonite 0.25Kg (bentonite is with the 2.5 weight % that dosage is vanadium titano-magnetite quality) is taken, main component is such as
Shown in table 15.
15 bentonitic main component of table/weight %
2. dry-mixed to material progress, material obtains the first mixed material after mixing, and the first mixed material is divided into two
Part, a part of 2.5625Kg (25 weight %) of the first mixed material, another part 7.6875Kg (75 of the first mixed material
Weight %), 26g sodium carbonate is added into a part for the first mixed material and the water of 76.87g obtains the second mixed material, to
The water that 615g is added in another part of first mixed material obtains balling-up material, respectively mixing.
3. using disc balling machine pelletizing, the rotational frequency of disc balling machine is 3000Hz, and inclination angle is 45 degree, Balling time one
Totally 25 minutes.Pelletizing initial stage manufactures mother bulb with the second low mixed material of water content, during preparing mother bulb, passes through mist
Change the water for adding the mode of water that 128g is added, discharges when mother bulb size reaches 3-5 millimeters.Mother bulb discharging enters balling-up through belt feeder
It grows up in balling disk (-sc), this stage is with addition of high-moisture balling-up material pelletizing, until pelletizing diameter reaches 8-16 millimeters, pelletizing at this time
Water content be 8.0 weight %.
4. after pelletizing, being sieved to pelletizing, 8-16 millimeters of qualified V-ti Bearing Magnetite Pellets are carried out at drying
Reason, 200-250 degrees Celsius of wind-warm syndrome, 40 minutes time.
5. the pelletizing after pair drying carries out oxidizing roasting processing, 900 degrees Celsius of preheating temperature, 20 minutes time, roasting temperature
1250 degrees Celsius of degree, 15 minutes time.
6. cooling, cooling method is air-cooled or air-cooled.It is 3946N ＞ that pelletizing after cooling, which measures its compression strength,
2000N, the porosity 19.46% fully meet Shaft Furnace Pelletizing Process and enter stove requirement.
Wherein, vanadium titano-magnetite acid pellet ingredient is as shown in table 16.
16 vanadium titano-magnetite acid pellet ingredient of table/weight %
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in a or multiple embodiments or example.In addition, without conflicting with each other, the technology of this field
The feature of different embodiments or examples described in this specification and different embodiments or examples can be combined by personnel
And combination.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (9)
1. a kind of shaft furnace preparation method of vanadium titano-magnetite acid pellet, which is characterized in that including：
(1) Fine Concentrates of V-ti-bearing Magnetite is mixed with bentonite, to obtain the first mixed material；
(2) part in first mixed material is mixed with sodium carbonate and water, to obtain the second mixed material；
(3) second mixed material is subjected to the first pelletizing processing, to obtain mother bulb；
(4) another part in first mixed material is mixed with water, to obtain balling-up material；
(5) mother bulb with the balling-up material mix and the second pelletizing is handled, made described in the balling-up material package
Mother bulb, to obtain V-ti Bearing Magnetite Pellets；And
(6) V-ti Bearing Magnetite Pellets are dried and oxidizing roasting, ball is aoxidized to obtain shaft furnace vanadium titano-magnetite
Group；
Wherein,
The addition of the sodium carbonate is the 1-2.5 weight % of the part in first mixture.
2. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that described
A part in one mixed material accounts for the 10-25 weight % of first mixed material, another in first mixed material
Part accounts for the 75-90 weight % of first mixed material.
3. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that described swollen
The addition of profit soil is the 1-2.5 weight % of the Fine Concentrates of V-ti-bearing Magnetite.
4. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that described
The water content of two mixed materials is 2-3 weight %.
5. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that it is described at
The water content of ball material is 6-9 weight %.
6. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that described
The processing of one pelletizing further comprises that water is added with atomised form into second mixed material.
7. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that the mother
The average grain diameter of ball is 3-5 millimeters.
8. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that the vanadium
The average grain diameter of titanomagnetite pelletizing is 8-16 millimeters.
9. the shaft furnace according to claim 1 preparation method of vanadium titano-magnetite acid pellet, which is characterized in that further
Including：
(7) screening process is carried out to the V-ti Bearing Magnetite Pellets before step (6), is less than 8 millimeters to isolate grain size
And/or the material more than 16 millimeters, it is mixed with first mixed material after drying fine grinding；
(8) in step (6), it is thin that material of the grain size less than 8 millimeters and/or more than 16 millimeters will be isolated after the drying
It is mixed after mill and with first mixed material.
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