CN106702147A - Method and system for reducing reduction degradation of vanadium-titanium magnet pellets - Google Patents
Method and system for reducing reduction degradation of vanadium-titanium magnet pellets Download PDFInfo
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- CN106702147A CN106702147A CN201611032927.9A CN201611032927A CN106702147A CN 106702147 A CN106702147 A CN 106702147A CN 201611032927 A CN201611032927 A CN 201611032927A CN 106702147 A CN106702147 A CN 106702147A
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- magnetite
- ball
- miberal powder
- pelletizing
- green
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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
Abstract
The invention discloses a method and system for reducing reduction degradation of vanadium-titanium magnet pellets. The method for reducing reduction degradation of the vanadium-titanium magnet pellets includes the following steps that firstly, vanadium-titanium magnetite is ground to be fine, and vanadium-titanium magnetite powder is obtained; secondly, the vanadium-titanium magnetite powder is mixed with bentonite, and a mixture is obtained; thirdly, the mixture is pelletized, and green pellets are obtained, wherein a boric acid water solution is added in the pelletizing process to serve as water for pellet pelletizing; and fourthly, the green pellets are roasted, and the vanadium-titanium magnet pellets are obtained. The invention further discloses a system implementing the method, and the system includes a fine grinding device, a material mixing device, a pelletizing device and a roasting device. According to the method and the device, in the pelletizing process, the boric acid water solution is evenly sprayed into the green pellets, the reduction degradation rate of the vanadium-titanium magnet pellets is effectively reduced, and the metallurgical performance in the pellet smelting reduction process is improved.
Description
Technical field
The present invention relates to a kind of method and system for reducing v-ti magnetite pellet ore reduction efflorescence, belong to v-ti magnetite mining and metallurgy
Gold goal group's production field.
Background technology
V-ti Bearing Magnetite Pellets will occur different degrees of efflorescence, with smelting condition during smelting reducing
Change, efflorescence degree difference is larger, and some efflorescence are lighter, and some efflorescence are serious, and serious influence furnace condition anterograde is reduced and smelts effect
Rate, increases smelting cost.Accordingly, it is capable to a kind of skill of the no efflorescence in the pelletizing production stage finds suppression and reduces reduction process
Art, has realistic meaning to the utilization of v-ti magnetite ore resources.
The A of Chinese patent application publication No. CN 104060083 disclose a kind of sintering method of vanadium titano-magnetite, and its is main
It is technically characterized in that：According to SINTERING PRODUCTION technique, by dispensing, primary and secondary mixing, cloth, light a fire, carry out v-ti magnetite
Ore deposit sintering deposit is produced, and is used for blast furnace.The technique is disadvantageous in that it is to provide a kind of vanadium titano-magnetite application method,
Vanadium-titanium sinter is produced according to sintering process, but do not take preventive measures solve smelting reducing during efflorescence ask
Topic.
The A of Chinese patent application publication No. CN 102485921 disclose a kind of Pellet production method of v-ti magnetite concentrate,
Roller mill is carried out to vanadium titano-magnetite using high-pressure roller mill, then pelletizing after uniformly mixing with certain proportion binding agent, improve vanadium titanium
The balling ratio of magnetic iron ore, reduces bentonite consumption, improves into stove ore deposit grade.The technique is disadvantageous in that：Using pelletizing process
It is also that physics mode treatment has been carried out to vanadium titano-magnetite raw material to process vanadium titano-magnetite, effect occurs in pellet roasting rank
Section, improves into stove ore deposit grade, but powder phenomenon-tion to pellet in the smelting reducing stage does not have precautionary measures.
The A of Chinese patent application publication No. CN 104278143 disclose a kind of suppression vanadium-titanium sinter low temperature efflorescence
Novel binders, it is mainly characterized by：Vanadium-titanium sinter is produced according to sintering process, then by new additive agent
Mix with water according to a certain ratio, be sprayed on finished product sintering deposit and suppress the problem of vanadium-titanium sinter reduction degradation to reach.
The technique the disadvantage is that, finished product sintering deposit sprinkling the aqueous solution, due to high-temperature quenching, cause internal stress to increase, burning can be reduced
Tie the intensity of ore deposit.
It would therefore be highly desirable to develop a kind of can effectively reduce pulverizing problem of the v-ti magnetite pellet during smelting reducing
New technology.
The content of the invention
First technical problem to be solved by this invention is to provide a kind of reduction v-ti magnetite pellet ore reduction efflorescence
Method, the method, using the link that adds water in pelletizing operation, boric acid is mixed with pelletizing water and is matched somebody with somebody in pellet production process
The boric acid aqueous solution of required concentration is set to, as green-ball is grown up the process for adding water, boric acid aqueous solution is equably sprayed onto green-ball
In, effectively reduce the reduction and pulverization ratio of prepared V-ti Bearing Magnetite Pellets ore deposit.
Second technical problem to be solved by this invention is to provide a kind of implementation reduction v-ti magnetite pellet also
The system of former pulverization methods.
In order to solve the above technical problems, the technical solution used in the present invention is：
The present invention discloses a kind of method for reducing v-ti magnetite pellet ore reduction efflorescence first, comprises the following steps：(1)
Vanadium titano-magnetite is levigate, obtain v-ti magnetite miberal powder；(2) v-ti magnetite miberal powder and bentonite are mixed, obtains compound；
(3) compound is carried out into pelletizing, obtains green-ball；Boric acid aqueous solution is added wherein in balling process as pelletizing pelletizing water；
(4) green-ball is calcined, is obtained final product V-ti Bearing Magnetite Pellets ore deposit.
Wherein, according to mass percent meter, the concentration of step (3) described boric acid aqueous solution is 0.1-0.5%.
Further, counted as 100% with v-ti magnetite miberal powder and bentonitic gross mass, step (3) described boric acid aqueous solution
Addition be 1-2%.
Further, step (1) the levigate particle for granularity ＜ 0.074mm in the levigate miberal powder to v-ti magnetite is accounted for
60%-80%.
Further, step (2) the v-ti magnetite miberal powder and bentonitic ratio are：In parts by weight, v-ti magnetite
Miberal powder 95-99 parts, bentonite 1-5 parts.
Further, step (3) described green-ball is the ball of diameter 10-18mm.
Further, the temperature of step (4) described roasting is 1150-1350 DEG C.
The present invention mixes boric acid with pelletizing water according to a certain percentage, is configured to the boric acid aqueous solution of required concentration, so
Afterwards using the link that added water in pellet pelletizing operation, using boric acid aqueous solution as pelletizing pelletizing water, in green-ball growth process
Boric acid aqueous solution is equably sprayed, pelletizing pelletizing is completed.The inventive method suppresses the theory of v-ti magnetite pellet ore reduction efflorescence
Basis is：Boron is one of typical element in crystal chemistry stabilizer, and in pellet heating process, boron ion enters granule glass
In glass phase, the mechanics and dynamic performance of glass phase are improved, the intensity of pellet can be increased；Meanwhile, it is heated in pellet
Cheng Zhong, boron-containing compound increased the mobile phase in pellet, reduce pellet apparent porosity, thus reduce low temperature powder
Change the speed of reaction, improve the metallurgical performance during pellet smelting reducing.The present invention adds boric acid in balling process
Enter inside pelletizing, it is ensured that pelletizing is inside and outside all to have boric acid, effectively reduces the pulverization rate after pellet roasting.
V-ti Bearing Magnetite Pellets ore deposit prepared by the inventive method, reduction is determined according to standard GB/T/T13242-1991
Pulverization rate index.Measurement result shows, after present invention treatment>Treatment of the 6.3mm parts than being not added with boric acid is higher by 5.2-
13.8%；>3.15mm improves 2.3-8.3% in part；<0.5mm reduces part 2.1-2.5%, the vanadium titanium magnetic prepared by the present invention
The reduction and pulverization ratio of iron ore pellets ore deposit is significantly reduced.
The present invention further discloses a kind of system for implementing methods described, including：Fine mill, mixing device, pelletizing
Device and calciner.
Wherein, the fine mill is provided with vanadium titano-magnetite charging aperture and v-ti magnetite miberal powder discharging opening；The batch mixing dress
V-ti magnetite miberal powder charging aperture, bentonite charging aperture and compound discharging opening are installed；The palletizing device is provided with compound and enters
Material mouth and green-ball discharging opening, the palletizing device is additionally provided with boric acid aqueous solution charging aperture, for adding boric acid aqueous solution；The roasting
Burn device and be provided with green-ball charging aperture and V-ti Bearing Magnetite Pellets ore deposit discharging opening.
Further, the v-ti magnetite miberal powder of the v-ti magnetite miberal powder discharging opening of the fine mill and the mixing device
Charging aperture is connected；The compound discharging opening of the mixing device is connected with the compound charging aperture of the palletizing device；It is described to make
The green-ball discharging opening of ball device is connected with the green-ball charging aperture of the calciner.
System of the present invention, vanadium titano-magnetite enters fine mill through vanadium titano-magnetite charging aperture, by vanadium titano-magnetite
It is levigate, obtain v-ti magnetite miberal powder；V-ti magnetite miberal powder enters mixing device through the v-ti magnetite miberal powder charging aperture of mixing device,
Bentonite enters mixing device through the bentonite charging aperture of mixing device, and v-ti magnetite miberal powder is mixed with bentonite in mixing device
Close uniform, obtain compound；Compound carries out pelletizing through the compound charging aperture of palletizing device into palletizing device, is given birth to
Ball；Wherein, in balling process, first boric acid is mixed according to a certain percentage with pelletizing water, is configured to the boric acid of required concentration
The aqueous solution, puts into the case that adds water of pelletizing water, is added water link using pellet production pelletizing operation, and boric acid aqueous solution is made
It is pelletizing pelletizing water, as green-ball is grown up the process for adding water, equably boric acid aqueous solution is sprayed onto in green-ball；Green-ball is through roasting
The green-ball charging aperture for burning device is calcined into calciner, that is, obtain V-ti Bearing Magnetite Pellets ore deposit.
Palletizing device of the present invention is selected from disc balling machine or pelletising drum.
Calciner of the present invention is selected from grate kiln, belt type roasting machine or shaft furnace.
" connected " of the present invention can be fixedly connected, or be detachably connected；Can mechanically connect, also may be used
Be electrical connection；Can be directly connected to, or be indirectly connected to by intermediary.
Technical solution of the present invention compared with prior art, has the advantages that：
The present invention is added water link, by a certain proportion of boric acid and pelletizing in pellet production process using pelletizing operation
Boric acid aqueous solution is mixed and made into water, as green-ball is grown up the process for adding water, during boric acid aqueous solution equably added into green-ball, then
Complete whole pelletizing production process.
The present invention in pellet-roasting heating process, reduces liquid phase forming temperature using the characteristic of boric acid low melting point, makes
Nodulizing apparent porosity is reduced, and the speed of low temperature efflorescence reaction is reduced, so as to improve v-ti magnetite pellet smelting reducing mistake
Metallurgical performance in journey.
The inventive method is simple, and the impurity brought into is few, and effect is significant, and metallurgical properties index is obviously improved.
Brief description of the drawings
Fig. 1 is the structural representation of the system that the present invention implements reduction v-ti magnetite pellet ore reduction pulverization methods.
Specific embodiment
Further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
It is apparent.It should be understood that the embodiment is only exemplary, any limitation is not constituted to the scope of the present invention.This area
Technical staff should be understood that without departing from the spirit and scope of the invention can to the details of technical solution of the present invention and
Form is modified or is replaced, but these modifications or replacement each fall within protection scope of the present invention.
As shown in figure 1, the invention provides a kind of system implemented and reduce v-ti magnetite pellet ore reduction pulverization methods, bag
Include：Fine mill 1, mixing device 2, palletizing device 3 and calciner 4.
Wherein, fine mill 1 is provided with vanadium titano-magnetite charging aperture and v-ti magnetite miberal powder discharging opening；Mixing device 2 is provided with
V-ti magnetite miberal powder charging aperture, bentonite charging aperture and compound discharging opening；Palletizing device 3 is provided with compound charging aperture and green-ball
Discharging opening, palletizing device 3 is additionally provided with boric acid aqueous solution water inlet；Calciner 4 is provided with green-ball charging aperture and vanadium titano-magnetite ball
Nodulizing discharging opening.；
Further, the v-ti magnetite miberal powder charging aperture of the v-ti magnetite miberal powder discharging opening of fine mill 1 and mixing device 2
It is connected；The compound discharging opening of mixing device 2 is connected with the compound charging aperture of palletizing device 3；The green-ball discharging of palletizing device 3
Mouth is connected with the green-ball charging aperture of calciner 4.
Used as one embodiment of the present invention, the palletizing device 3 is selected from disc balling machine or pelletising drum, described
Boric acid aqueous solution water inlet is the water inlet of the case that adds water of disc balling machine or pelletising drum；Calciner 4 is selected from drying grate
Rotary kiln, belt type roasting machine or shaft furnace.
System of the present invention, vanadium titano-magnetite enters fine mill 1 through vanadium titano-magnetite charging aperture, by vanadium titano-magnetite
It is levigate, obtain v-ti magnetite miberal powder；V-ti magnetite miberal powder enters mixing device through the v-ti magnetite miberal powder charging aperture of mixing device 2
2, bentonite enters mixing device 2 through the bentonite charging aperture of mixing device 2, and v-ti magnetite miberal powder is with bentonite in mixing device
It is well mixed in 2, obtains compound；Compound carries out pelletizing through the compound charging aperture of palletizing device 3 into palletizing device 3,
Obtain green-ball；In balling process, boric acid and pelletizing water are first mixedly configured into the boric acid aqueous solution of required concentration, put into
In the case that adds water of pelletizing water, using boric acid aqueous solution as pelletizing pelletizing water, boron is equably sprayed in green-ball growth process
Aqueous acid；The green-ball charging aperture of the fired device 4 of green-ball is calcined into calciner 4, that is, obtain vanadium titano-magnetite ball
Nodulizing.
" connected " of the present invention can be fixedly connected, or be detachably connected；Can mechanically connect, also may be used
Be electrical connection；Can be directly connected to, or be indirectly connected to by intermediary.
The measure GENERAL EXPERIMENTATION of the V-ti Bearing Magnetite Pellets ore deposit reduction and pulverization ratio prepared by the present invention
1st, material to be tested
V-ti Bearing Magnetite Pellets ore deposit prepared by embodiment 1-3 as described below.
2nd, test method
By national standard《The method of cold rotary drum is used after the static reduction of iron ore low temperature efflorescence experiment》GB/T13242-
1991 are carried out.Measured sample is put into reaction tube, reaction tube is inserted in heating furnace and is heated up, be passed through during to 200 DEG C
N2Protected.When temperature is raised to 500 DEG C and stabilization, it is passed through by CO, CO2、N2The reducing gas of composition carries out static reduction.
Three kinds of compositions of gas are CO 20%, CO in reducing gas220%th, N260%, three kinds of reducing gas total flows are 0.9m3/
H, the recovery time is 1h, then changes logical N2Protection, reduction tube is taken out from stove and is cooled to normal temperature.Sample is fallen from reduction tube
Go out, be put into and turn 300 turns in small drum unit, the time is 10min, is then sieved with 6.3mm, 3.15mm, 0.5mm square hole screen,
Obtained after screening more than 6.3mm, 3.15mm and the material less than 0.5mm, sample before the quality of material and rotary drum after reduction screening
The percentage of the ratio between gross mass is pellet ore reduction pulverization rate.
Embodiment 1
(1) it is vanadium titano-magnetite is levigate, v-ti magnetite miberal powder is obtained, ratio of its granularity requirements less than 0.074mm exists
Between 60%~80%；
(2) v-ti magnetite miberal powder and bentonite are mixed, obtains compound；Specifically match and be, v-ti magnetite miberal powder
95kg, bentonite 5kg；
(3) by compound, (disc balling machine) is made green-ball on pelletizer, and the green-ball is the circle of diameter 10-18mm
Ball；Wherein, add boric acid aqueous solution as pelletizing pelletizing water in balling process, boric acid aqueous solution concentration is 0.1% (quality
Percentage)；The addition point of boric acid aqueous solution is the filling up area of pelletizer, and boric acid and water are first configured to the boric acid water of required concentration
Solution, then add it to the case that adds water of pelletizer, boric acid aqueous solution is equably added into green-ball in green-ball growth process
In.Counted as 100% with vanadium titano-magnetite and bentonitic gross mass, the addition of boric acid aqueous solution is 1%.
(4) by V-ti Bearing Magnetite Pellets, (grate kiln) is calcined on equipment is baked, and sintering temperature is 1150
DEG C, obtain V-ti Bearing Magnetite Pellets ore deposit.
The pellet obtained with the method, reduction and pulverization ratio index is determined according to standard GB/T/T13242-1991.Survey
Determine result to show：With with water compared with V-ti Bearing Magnetite Pellets ore deposit pelletizing water, in the present embodiment, with boric acid aqueous solution as vanadium
The pelletizing water of titanomagnetite pellet, its testing result shows：More than the reduction and pulverization ratio of 6.3mm V-ti Bearing Magnetite Pellets ore deposits
Improve 5.2%；Reduction and pulverization ratio 2.3% is improved more than 3.15mm V-ti Bearing Magnetite Pellets ore deposit；Less than 0.5mm vanadium titano-magnetite balls
Nodulizing reduction and pulverization ratio reduces 2.1%.
Embodiment 2
(1) it is vanadium titano-magnetite is levigate, v-ti magnetite miberal powder is obtained, ratio of its granularity requirements less than 0.074mm exists
Between 60%~80%；
(2) v-ti magnetite miberal powder and bentonite are mixed, obtains compound；Specifically match and be, v-ti magnetite miberal powder
99kg, bentonite 1kg；
(3) by compound, (pelletising drum) is made green-ball on pelletizer, and the green-ball is the circle of diameter 10-18mm
Ball；Wherein, add boric acid aqueous solution as pelletizing pelletizing water in balling process, boric acid aqueous solution concentration is 0.25% (matter
Amount percentage)；The addition point of boric acid aqueous solution is the filling up area of pelletizer, and boric acid and water are first configured to the boric acid of required concentration
The aqueous solution, then add it to the case that adds water of pelletizer, equably boric acid aqueous solution is added in green-ball growth process give birth to
In ball.Counted as 100% with vanadium titano-magnetite and bentonitic quality, the addition of boric acid aqueous solution is 2%.
(4) by V-ti Bearing Magnetite Pellets, (belt type roasting machine) is calcined on equipment is baked, and sintering temperature is 1350 DEG C,
Obtain V-ti Bearing Magnetite Pellets ore deposit.
The pellet obtained with the method, reduction and pulverization ratio index is determined according to standard GB/T/T13242-1991.Survey
Determine result to show：With with water compared with V-ti Bearing Magnetite Pellets ore deposit pelletizing water, in the present embodiment, with boric acid aqueous solution as vanadium
The pelletizing water of titanomagnetite pellet, its testing result shows：More than the reduction and pulverization ratio of 6.3mm V-ti Bearing Magnetite Pellets ore deposits
Improve 8.8%；Reduction and pulverization ratio 4.3% is improved more than 3.15mm V-ti Bearing Magnetite Pellets ore deposit；Less than 0.5mm vanadium titano-magnetite balls
Nodulizing reduction and pulverization ratio reduces 2.3%.
Embodiment 3
(1) it is vanadium titano-magnetite is levigate, v-ti magnetite miberal powder is obtained, ratio of its granularity requirements less than 0.074mm exists
Between 60%~80%；
(2) v-ti magnetite miberal powder and bentonite are mixed, obtains compound；Specifically match and be, v-ti magnetite miberal powder
97kg, bentonite 3kg；
(3) by compound, (pelletising drum) is made green-ball on pelletizer, and the green-ball is the circle of diameter 10-18mm
Ball；Wherein, add boric acid aqueous solution as pelletizing pelletizing water in balling process, boric acid aqueous solution concentration is 0.5% (quality
Percentage)；The addition point of boric acid is the filling up area of pelletizer, and boric acid and water are first configured to the boric acid aqueous solution of required concentration,
In adding it to the case that adds water of pelletizer again, during boric acid aqueous solution equably is added into green-ball in green-ball growth process.With
Vanadium titano-magnetite and bentonitic quality are 100% meter, and the addition of boric acid aqueous solution is 1.5%.
(4) by V-ti Bearing Magnetite Pellets, (shaft furnace) is calcined on equipment is baked, and sintering temperature is 1250 DEG C, obtains vanadium
Titanomagnetite pellet.
The pellet obtained with the method, reduction and pulverization ratio index is determined according to standard GB/T/T13242-1991.Survey
Determine result to show：With with water compared with V-ti Bearing Magnetite Pellets ore deposit pelletizing water, in the present embodiment, with boric acid aqueous solution as vanadium
The pelletizing water of titanomagnetite pellet, its testing result shows：More than the reduction and pulverization ratio of 6.3mm V-ti Bearing Magnetite Pellets ore deposits
Improve 13.8%；Reduction and pulverization ratio 8.3% is improved more than 3.15mm V-ti Bearing Magnetite Pellets ore deposit；Less than 0.5mm vanadium titano-magnetites
Pellet ore reduction pulverization rate reduces 2.5%.
Comparative example
Replace boric acid using calcium chloride：The calcium chloride water of spray concentration 3% on v-ti magnetite pellet surface, wherein
The addition of calcium chloride water accounts for the 4% of v-ti magnetite pellet gross weight, is surveyed according to standard GB/T/T13242-1991
Determine reduction and pulverization ratio index；Compared with vanadium titano-magnetite pelletizing water, in the present embodiment, calcium chloride water is sprayed with water
It is the pelletizing water of v-ti magnetite pellet, its testing result shows：More than the reduction degradation of 3.15mm v-ti magnetite pellets
Rate improves 3.9%.
Claims (9)
1. it is a kind of reduce v-ti magnetite pellet ore reduction efflorescence method, it is characterised in that comprise the following steps：(1) by vanadium titanium
Magnetic iron ore is levigate, obtains v-ti magnetite miberal powder；(2) v-ti magnetite miberal powder and bentonite are mixed, obtains compound；(3) will be mixed
Closing material carries out pelletizing, obtains green-ball；Boric acid aqueous solution is added wherein in balling process as pelletizing pelletizing water；(4) will be raw
Ball is calcined, and obtains final product V-ti Bearing Magnetite Pellets ore deposit；Wherein, according to mass percent meter, the concentration of the boric acid aqueous solution is
0.1-0.5%.
2. in accordance with the method for claim 1, it is characterised in that：It is 100% with v-ti magnetite miberal powder and bentonitic quality
Meter, the addition of step (3) described boric acid aqueous solution is 1-2%.
3. in accordance with the method for claim 1, it is characterised in that：Step (1) it is described it is levigate for levigate to v-ti magnetite miberal powder
The particle of middle granularity ＜ 0.074mm accounts for 60%-80%.
4. in accordance with the method for claim 1, it is characterised in that step (2) the v-ti magnetite miberal powder and bentonitic ratio
Example be：In parts by weight, v-ti magnetite miberal powder 95-99 parts, bentonite 1-5 parts.
5. in accordance with the method for claim 1, it is characterised in that：Step (3) described green-ball is the ball of diameter 10-18mm.
6. in accordance with the method for claim 1, it is characterised in that：The temperature of step (4) described roasting is 1150-1350 DEG C.
7. it is a kind of implement claim 1 to 6 any one methods described system, it is characterised in that including：It is fine mill, mixed
Material device, palletizing device and calciner；
Wherein, the fine mill is provided with vanadium titano-magnetite charging aperture and v-ti magnetite miberal powder discharging opening；The mixing device sets
There are v-ti magnetite miberal powder charging aperture, bentonite charging aperture and compound discharging opening；The palletizing device is provided with compound charging aperture
With green-ball discharging opening；The calciner is provided with green-ball charging aperture and V-ti Bearing Magnetite Pellets ore deposit discharging opening；
The v-ti magnetite miberal powder discharging opening of the fine mill is connected with the v-ti magnetite miberal powder charging aperture of the mixing device；Institute
The compound discharging opening of mixing device is stated to be connected with the compound charging aperture of the palletizing device；The green-ball of the palletizing device goes out
Material mouth is connected with the green-ball charging aperture of the calciner.
8. according to the system described in claim 7, it is characterised in that：The palletizing device is selected from disc balling machine or cylinder pelletizing
Machine.
9. according to the system described in claim 7, it is characterised in that：The calciner is selected from grate kiln, belt and roasts
Burning machine or shaft furnace.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109355494A (en) * | 2018-11-22 | 2019-02-19 | 攀钢集团攀枝花钢铁研究院有限公司 | It is a kind of can be improved anti-grinded hardness index containing the pelletizing and preparation method thereof containing chromic vanadium-titanium ferroferrite |
| CN112553388A (en) * | 2020-11-23 | 2021-03-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace charge of high-grade vanadium titano-magnetite and smelting method |
| CN114480836A (en) * | 2021-12-22 | 2022-05-13 | 武钢集团昆明钢铁股份有限公司 | Low-cost sinter of high-proportion vanadium-titanium magnetite concentrate and preparation method thereof |
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| CN109355494A (en) * | 2018-11-22 | 2019-02-19 | 攀钢集团攀枝花钢铁研究院有限公司 | It is a kind of can be improved anti-grinded hardness index containing the pelletizing and preparation method thereof containing chromic vanadium-titanium ferroferrite |
| CN112553388A (en) * | 2020-11-23 | 2021-03-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace charge of high-grade vanadium titano-magnetite and smelting method |
| CN114480836A (en) * | 2021-12-22 | 2022-05-13 | 武钢集团昆明钢铁股份有限公司 | Low-cost sinter of high-proportion vanadium-titanium magnetite concentrate and preparation method thereof |
| CN114480836B (en) * | 2021-12-22 | 2023-09-12 | 武钢集团昆明钢铁股份有限公司 | Low-cost sinter of high-ratio vanadium-titanium magnetite concentrate and preparation method thereof |
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