CN106319127B - With the method for vanadium titano-magnetite concentrate production direct reduced iron and titanium nitride - Google Patents
With the method for vanadium titano-magnetite concentrate production direct reduced iron and titanium nitride Download PDFInfo
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- CN106319127B CN106319127B CN201610873654.4A CN201610873654A CN106319127B CN 106319127 B CN106319127 B CN 106319127B CN 201610873654 A CN201610873654 A CN 201610873654A CN 106319127 B CN106319127 B CN 106319127B
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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
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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
- C21B13/008—Use of special additives or fluxing agents
-
- 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
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1236—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching
- C22B34/124—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching using acidic solutions or liquors
-
- 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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention provides a kind of method with vanadium titano-magnetite concentrate production direct reduced iron and titanium nitride, belongs to technical field of resource utilization.This method will be after vanadium titano-magnetite concentrate, carbonaceous reducing agent, additive and binder mixed pelletizing or pressure ball, the roasted product that main component is direct reduced iron and titanium nitride is obtained in 1200~1500 DEG C of reduction roastings, direct-reduction iron product and rich vanadium two products of titanium slag are sub-elected after roasted product ore grinding, rich vanadium titanium slag obtains high purity silicon nitride titanium products and rich vanadium leachate through acidleach again.This technique realizes the green composite recycling to iron, titanium, vanadium component in vanadium titano-magnetite, has the advantages that raw material sources are extensive, process is short, at low cost, added value of product is high.The direct reduced iron that the rate of recovery is greater than 90% greater than 90%, Iron grade is finally obtained, nitridation titanium products and vanadium recovery of the rate of recovery greater than 90%, purity greater than 99% are greater than 70% rich vanadium leachate.
Description
Technical field
The present invention relates to technical field of resource utilization, particularly relate to a kind of vanadium titano-magnetite concentrate production direct reduced iron
With the method for titanium nitride.
Background technique
V-bearing titanomagnetite smelting is world-famous puzzle, and China passes through the research of technique of decades, realizes technological break-through, at present
Form the vanadium titano-magnetite industrial process stream of " blast furnace ironmaking-pneumatic steelmaking ".But the technique is produced as dominating with steel, only
70% or so vanadium enters molten iron, rich vanadium steel slag is then generated in convertor steelmaking process, then through sodium roasting-water logging technique
The rate of recovery, the comprehensive recovery of vanadium only 47% or so；Titanium is enriched in blast furnace slag, but because of TiO2Content low (25% or less), object
Mutually complicated, there is presently no mature techniques can handle, therefore greatly wastes valuable titanium resource.In addition, a large amount of
Blast furnace titaniferous slag stockpiling, occupies a large amount of soil, while also resulting in soil and water pollution.Therefore it is badly in need of exploitation clean and effective
New process improves the utilization rate of titanium, vanadium in vanadium titano-magnetite.
TiN has golden yellow, fusing point high (2950 DEG C), hardness big (Mohs' hardness 8-9), chemical stability good and metal
Wetting is small, the features such as conductive and superconductivity performance is good, nontoxic, be widely used in machining, cosmetic decoration, aerospace and
The various fields such as war industry, electronics and battery and medical instrument.Currently, titanium nitride is mainly with high-purity Ti O2Or ilmenite is
Raw material is prepared using carbon reduction-nitridation technique, and carbon reduction-nitridation is needed with high-purity Ti O2Or ilmenite is raw material.In addition, may be used also
With directly fabricated in situ titanium nitride membrane on the surface of the material, most common titanium nitride membrane synthetic method is physical vaporous deposition
And chemical vapour deposition technique.Both of which is that pure titanium distils, and reacts in high-energy vacuum environment with nitrogen.It also can be
Under high temperature, titanium nitride is obtained by titanium tetrachloride-nitrogen gaseous mixture and ammonia-hydrogen mixing solid/liquid/gas reactions, or titanium-hydrogen-nitrogen is mixed
Gas is heated to high temperature by graphite, is deposited on basis material after cooling and forms film.Either physical vaporous deposition is still changed
It learns vapour deposition process to be both needed to using pure titanium as raw material, and synthesis condition is harsh, therefore high production cost.
In view of from vanadium titano-magnetite blast furnace process titanium slag recycle titanium products difficulty it is big, at high cost, environmental pollution is big, have
Researcher synthesizes Fe-TiC (N) composite material using vanadium titano-magnetite and coal as raw material, using hot carbon reducing process, but such
Impurities of materials content is high-leveled and difficult with application, while vanadium resource is not also recycled effectively.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of with vanadium titano-magnetite concentrate production direct reduced iron and nitridation
The method of titanium.
This method specifically comprises the following steps:
(1) pelletizing: vanadium titano-magnetite concentrate, carbonaceous reducing agent, additive and binder are mixed in a certain ratio and add water
Pelletizing or pressure ball；
(2) it reduction roasting: after the drying of carbonaceous pelletizing obtained by step (1), is restored at 1200~1500 DEG C of maturing temperature
Roasting generates the roasted product comprising direct reduced iron and titanium nitride；The roasting of carbonaceous pelletizing is under reducing atmosphere or nitrogen protection
It carries out, nitrogen atmosphere is conducive to titanium nitride synthesis；Alkaline metal salt additive is added and has the effect that and a) promotes iron mineral also
Former and titanium nitride synthesis；B) metallic iron, titanium nitride particles is promoted to grow up；C) it converts gangue content to and is soluble in acid
Substance, convenient for the purification of subsequent nitridation carbon；D) promote vanadium component to be enriched in non-iron phase, and with the presence of ease of solubility compound, be convenient for
The extraction of subsequent vanadium.
(3) ore grinding sorts: roasted product obtained in step (2) is subjected to ore grinding, then by low intensity magnetic separation or screening or
Person's low intensity magnetic separation-screening process integration obtains direct reduced iron and rich vanadium titanium slag；Direct reduced iron is ferromagnetic substance, and granularity
Greatly, ductility is good, wear-resisting property is good, and other substances are weak magnetic or nonmagnetic, and general granularity is thinner, passes through low intensity magnetic separation or sieve
Divide or low intensity magnetic separation-screening process integration can separate direct reduced iron with other substances.Forming portion cyclotomy in roasted product
Screening after roasted ore simple crushing or ore grinding can be selected this portioned product by shape high-purity metallic iron coarse granule.Undersize is again
Direct reduced iron and rich vanadium titanium slag are obtained through ore grinding, low intensity magnetic separation operation.
(4) acidleach purifies: the rich vanadium titanium slag of the middle gained of step (3) further being cleaned by acid solution and obtains the production of high purity silicon nitride titanium
Product.The chemical property of titanium nitride is extremely stable, and hydrochloric acid, sulfuric acid, phosphoric acid are not dissolved under room temperature, is slightly soluble in chloroazotic acid, nitric acid, hydrogen fluorine
Acid, therefore the impurity in rich vanadium titanium slag can be removed by acidleach, while vanadium component is also enriched in leachate.
Wherein, in step (1) vanadium titano-magnetite concentrate used TFe grade > 45%, TiO2Grade > 5%, V2O5Grade >
0.1%.
In step (1) carbonaceous reducing agent be anthracite, bituminous coal, lignite, graphite, coke, semicoke, petroleum coke, biology coke in
One or more combinations；Additive is calcium hydroxide, potassium carbonate, potassium sulfate, sodium carbonate, sodium sulphate, calcirm-fluoride, sodium tetraborate
One of metal salts such as alkali are a variety of；Vanadium titano-magnetite concentrate in step (1), carbonaceous reducing agent, additive and binder
Mass ratio is 100:(10~50): (1~30): (0~10).
Roasted product is cooling under air or nitrogen protection in step (2), or passes through water quenching cooling by burning product.
The grade of direct reduced iron is greater than 90% in step (3), and iron recovery is greater than 90%.
Acidleach purification acid used is hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, phosphoric acid, perchloric acid, boric acid and benzene two in step (4)
One of sulfonic acid or multiple combinations.
The purity of the high purity silicon nitride titanium valve body obtained in step (4) is greater than 99%, and titanium recovery rate is greater than 90%.Rich vanadium leaches
The rate of recovery of vanadium is greater than 70% in liquid.
The advantageous effects of the above technical solutions of the present invention are as follows:
In above scheme, direct-reduction iron product is directly produced by vanadium titano-magnetite and nitrogenizes high-purity titanium products, there is original
Expect that from a wealth of sources, process is short, value of the product is high and environmental-friendly feature, green high-efficient be utilized iron in vanadium titano-magnetite,
Titanium, vanadium resource.Finally obtained the rate of recovery greater than 90%, Iron grade be greater than 90% direct reduced iron, the rate of recovery is greater than 90%,
Purity is greater than 99% nitridation titanium products, and vanadium recovery is greater than 70% rich vanadium leachate.
Detailed description of the invention
Fig. 1 is the method for the invention for producing direct-reduction iron product and high purity silicon nitride titanium products with vanadium titano-magnetite concentrate
Flow chart.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of side that direct-reduction iron product and high purity silicon nitride titanium products is produced with vanadium titano-magnetite concentrate
Method is said combined with specific embodiments below as shown in Figure 1, including pelletizing, reduction roasting, ore grinding, sorting and acidleach
It is bright.
Embodiment 1
Grade is respectively TFe 56.72%, TiO in certain vanadium titano-magnetite concentrate210.50%, V2O50.64%, wherein containing
Iron mineral is mainly vanadium titano-magnetite and a small amount of ilmenite, is substantially free of other gangue minerals.
By vanadium titano-magnetite concentrate: anthracite: sodium carbonate: starch 100:20:8:3 in mass ratio weigh it is uniformly mixed, so
Water is added to generate carbonaceous pelletizing in disc balling machine afterwards.Carbonaceous pelletizing is dried at 105 DEG C, is then placed in graphite crucible, and
Cover protection.When Muffle furnace is warming up to 1280 DEG C, graphite crucible is put into hearth roasting 80min, by crucible after roasting
Take out natural cooling at room temperature.Ore grinding is carried out to pelletizing after roasting, grinding fineness is that -0.074 ㎜ accounts for 60%, obtained ore pulp
Magnetic separation, magnetic field strength 100kA/m, magnetic concentrate are direct reduced iron, Iron grade 92.87%, and iron recovery is respectively
90.42%.Magnetic tailing is rich vanadium titanium slag, and rich vanadium titanium slag uses deionized water after hydrochloric acid, sulfuric acid, hydrofluoric acid dips stirring 30h
It rinses, obtains high purity silicon nitride titanium valve body.XRD and chemical analysis carried out to obtained nitride powder, crystal phase TiN is pure
Degree is 99.1%, titanium recovery rate 95%, and the rate of recovery of vanadium is 78.21% in leachate.
Embodiment 2
Grade is respectively TFe 48.72%, TiO in certain vanadium titano-magnetite concentrate219.32%, V2O51.64%, wherein containing
Iron mineral is mainly vanadium titano-magnetite and a small amount of ilmenite, is substantially free of other gangue minerals.
Vanadium titano-magnetite concentrate: carbonaceous reducing agent: additive: binder 100:25:10:5 in mass ratio weighs mixing, so
Afterwards plus 12% water mix.The group of carbonaceous reducing agent becomes anthracite: bituminous coal: active carbon: coke: semicoke: petroleum coke: graphite
Mass ratio is 40:10:10:10:10:10:10, and anthracite, bituminous coal, active carbon, coke, semicoke, petroleum coke and graphite are work
Industry product；Additive group is as calcium hydroxide: potassium carbonate: sodium sulphate: sodium carbonate: sodium sulphate: calcirm-fluoride: Boratex mass ratio is
10:15:10:10:15:15:10, calcium hydroxide, potassium carbonate, potassium sulfate, sodium carbonate, sodium sulphate, calcirm-fluoride, Boratex are work
Industry product；Binder group becomes waterglass: bentonite: starch: molasses: sodium carboxymethylcellulose mass ratio is 20:30:10:
30:10, waterglass, bentonite, starch, molasses, sodium carboxymethylcellulose are industrial products.Mixed material is to roll-in ball
Carbonaceous pelletizing is generated in machine, and carbonaceous pelletizing is dried at 105 DEG C, is then placed in graphite crucible, and seal.To Muffle furnace
When being warming up to 1330 DEG C, graphite crucible is put into hearth roasting 70min, it is after roasting that crucible taking-up is naturally cold at room temperature
But.Ore grinding is carried out to agglomerates, grinding fineness is that -0.4 ㎜ accounts for 80%, and ore milling product is sieved using the sieve of 0.2mm,
Oversize is high-grade direct reduced iron, Iron grade 95.12%.Undersize is carried out ore grinding, grinding fineness again
95% is accounted for for -0.074 ㎜, gained ore pulp carries out magnetic separation, magnetic field strength 70kA/m, and magnetic concentrate Iron grade is 90.87%, iron
Overall recovery is 95.12%.Rich vanadium titanium slag is through persalt, sulfuric acid, phosphoric acid, nitric acid, hydrofluoric acid, two sulphur of boric acid, perchloric acid and benzene
Acid-mixed is closed acid soak stirring and is rinsed afterwards with deionized water for 24 hours, and high purity silicon nitride titanium valve body and rich vanadium leachate are obtained.Titanium nitride it is pure
Degree is 99.30%, titanium recovery rate 91.12%, and the rate of recovery of vanadium is 83.24% in leachate.
Embodiment 3
Grade is respectively TFe 60.56%, TiO in certain vanadium titano-magnetite concentrate27.41%, V2O50.74%, wherein iron content
Mineral are mainly vanadium titano-magnetite and a small amount of ilmenite, are substantially free of other gangue minerals.
Vanadium titano-magnetite concentrate: carbonaceous reducing agent: additive: binder 100:38:12:7 in mass ratio weighs mixing.Carbon
The group of matter reducing agent becomes anthracite: bituminous coal: active carbon: coke: semicoke: petroleum coke: the mass ratio of graphite is 50:5:15:5:
15:5:5, anthracite, bituminous coal, active carbon, coke, semicoke, petroleum coke and graphite are industrial products；Additive group becomes hydrogen-oxygen
Change calcium: potassium carbonate: sodium sulphate: sodium carbonate: sodium sulphate: calcirm-fluoride: Boratex mass ratio is 8:20:15:5:20:10:22, hydrogen-oxygen
Changing calcium, potassium carbonate, potassium sulfate, sodium carbonate, sodium sulphate, calcirm-fluoride, Boratex is industrial products；Binder group becomes water glass
Glass: bentonite: starch: molasses: sodium carboxymethylcellulose mass ratio is 20:30:10:30:10, waterglass, bentonite, shallow lake
Powder, molasses, sodium carboxymethylcellulose are industrial products.Mixed material is in disc balling machine plus water generates carbonaceous pelletizing,
Carbonaceous pelletizing is dried at 105 DEG C, is then placed in graphite crucible, and cover protection.It, will when Muffle furnace is warming up to 1250 DEG C
Graphite crucible is put into hearth roasting 150min, and crucible is taken out natural cooling at room temperature after roasting.To agglomerates into
Row ore grinding, grinding fineness are that -0.074 ㎜ accounts for 85%, and obtained ore pulp carries out magnetic separation, magnetic field strength 150kA/m, magnetic concentrate
As direct reduced iron, Iron grade 92.87%, iron recovery are respectively 95.43%.Rich vanadium titanium slag is through persalt, sulfuric acid, phosphorus
Acid, nitric acid, hydrofluoric acid, boric acid, perchloric acid and benzenedisulfonic acid mixed acid soaking and stirring use deionized water repeated flushing afterwards for 24 hours, obtain
To high purity silicon nitride titanium valve body.XRD and chemical analysis, crystal phase TiN are carried out to obtained nitride powder, purity is
99.30%, titanium recovery rate 93.34%.The rate of recovery of vanadium is 79.12% in leachate.
Embodiment 4
Grade is respectively TFe 57.32%, TiO in certain vanadium titano-magnetite concentrate211.31%, V2O50.24%, wherein containing
Iron mineral is mainly vanadium titano-magnetite and a small amount of ilmenite, is substantially free of other gangue minerals.
Vanadium titano-magnetite concentrate: carbonaceous reducing agent: additive 100:38:22 in mass ratio weighs mixing.Carbonaceous reducing agent
Group become anthracite: bituminous coal: active carbon: coke: semicoke: petroleum coke: the mass ratio of graphite be 50:5:15:5:15:5:5, nothing
Bituminous coal, bituminous coal, active carbon, coke, semicoke, petroleum coke and graphite are industrial products；Additive group becomes calcium hydroxide: carbonic acid
Potassium: sodium sulphate: sodium carbonate: sodium sulphate: calcirm-fluoride: Boratex mass ratio is 25:15:7:10:13:15:15, calcium hydroxide, carbon
Sour potassium, potassium sulfate, sodium carbonate, sodium sulphate, calcirm-fluoride, Boratex are industrial products；Mixed material adds in disc balling machine
Water generates carbonaceous pelletizing, and carbonaceous pelletizing is dried at 105 DEG C, carbonaceous pelletizing is put into atmosphere furnace, nitrogen charging gas shielded is warming up to
1460 DEG C, 40min is then kept the temperature, is cooled down under nitrogen protection after roasting with furnace.Ore grinding, ore grinding are carried out to pelletizing after roasting
Fineness is that -0.074 ㎜ accounts for 67%, and obtained ore pulp carries out magnetic separation, magnetic field strength 130kA/m, and magnetic concentrate is directly also
Former iron, Iron grade 93.72%, iron recovery are respectively 96.56%.Rich vanadium titanium slag is through persalt, sulfuric acid, phosphoric acid, nitric acid, hydrogen
Fluoric acid, boric acid, perchloric acid and benzenedisulfonic acid mixed acid soaking and stirring use deionized water repeated flushing afterwards for 24 hours, obtain high purity silicon nitride
Titanium valve body.XRD and chemical analysis, crystal phase TiN, purity 99.38%, titanium recycling have been carried out to obtained nitride powder
Rate is 90.45%.The rate of recovery of vanadium is 70.15% in leachate.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of method with vanadium titano-magnetite concentrate production direct reduced iron and titanium nitride, it is characterised in that: including walking as follows
It is rapid:
Then plus water (1) pelletizing: vanadium titano-magnetite concentrate, carbonaceous reducing agent, additive and binder are mixed in a certain ratio,
Pelletizing or pressure ball；
(2) reduction roasting: after the drying of carbonaceous pelletizing obtained by step (1), the reduction roasting at 1250~1500 DEG C of maturing temperature
Generate the roasted product comprising direct reduced iron and titanium nitride；
(3) ore grinding sorts: roasted product obtained in step (2) being carried out ore grinding, then passes through low intensity magnetic separation or screening or weak
Magnetic separation-screening process integration obtains direct-reduction iron product and rich vanadium titanium slag；
(4) acidleach purifies: the rich vanadium titanium slag of gained in step (3) being obtained high purity silicon nitride titanium products by acidleach and rich vanadium leaches
Liquid；
TFe grade > 45%, TiO of vanadium titano-magnetite concentrate used in the step (1)2Grade > 5%, V2O5Grade > 0.1%；
Additive is calcium hydroxide, potassium carbonate, potassium sulfate, sodium carbonate, sodium sulphate, calcirm-fluoride, sodium tetraborate in the step (1)
One of or it is a variety of；
The mass ratio of vanadium titano-magnetite concentrate, carbonaceous reducing agent, additive and binder in the step (1) are as follows: 100:(10~
50): (1~30): (0~10)；
In the step (1) carbonaceous reducing agent be anthracite, bituminous coal, lignite, graphite, coke, semicoke, petroleum coke, biology coke in
One or more combinations；
Acidleach purification acid used is hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, phosphoric acid, perchloric acid, boric acid and benzene two in the step (4)
One of sulfonic acid is a variety of；
The roasting of carbonaceous pelletizing carries out under reducing atmosphere or nitrogen protection in the step (2)；Roasted product exists in step (2)
Cooling or roasted product passes through water quenching cooling under air or nitrogen protection；
Direct-reduction iron recovery obtained in the step (3) is greater than 90%, Iron grade greater than 90%, in the step (4)
Obtained high purity silicon nitride titanium recovery rate is greater than 90%, purity and is greater than 99%, vanadium recycling in richness vanadium leachate obtained in step (4)
Rate is greater than 70%.
2. the method according to claim 1 with vanadium titano-magnetite concentrate production direct reduced iron and titanium nitride, feature
Be: ore grinding in the step (3), ore grinding is no less than primary for dry grinding or wet-milling, ore grinding number in assorting room；Screening process
For dry screen or wet screening, low intensity magnetic separation and screening number are no less than primary；The magnetic field strength of low intensity magnetic separation is 30~200KA/m.
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| CN106987672A (en) * | 2017-04-17 | 2017-07-28 | 朝阳金河粉末冶金材料有限公司 | The method that low-grade vanadium titano-magnetite powder produces natural micro alloy reduced iron powder |
| CN107419090A (en) * | 2017-07-04 | 2017-12-01 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of separation method of vanadium titano-magnetite and application |
| CN107619896A (en) * | 2017-09-27 | 2018-01-23 | 昆明理工大学 | A kind of method added calcium powder and improve v-ti magnetite concentrate direct-reduction efficiency |
| CN107739816A (en) * | 2017-10-18 | 2018-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that pyrite cinder prepares iron powder |
| CN108018437B (en) * | 2017-10-24 | 2020-04-24 | 钢研晟华科技股份有限公司 | Low-temperature comprehensive recovery process for iron, vanadium and titanium in vanadium-titanium magnetite |
| CN108531752A (en) * | 2018-06-13 | 2018-09-14 | 长江师范学院 | A kind of preparation method of reduction titanium |
| CN108929951A (en) * | 2018-08-07 | 2018-12-04 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of utilization method of v-ti magnetite concentrate |
| CN109136537A (en) * | 2018-09-30 | 2019-01-04 | 四川安宁铁钛股份有限公司 | The technique that vanadium titano-magnetite prepares liquid vanadium extraction acceptable material and direct vanadium extraction |
| CN109852791B (en) * | 2019-02-01 | 2020-05-05 | 东北大学 | Method for preparing high-alkalinity chromium-vanadium-titanium-containing pellets by adopting calcium oxide |
| CN112024121B (en) * | 2020-08-31 | 2023-05-23 | 重庆优钛实业有限公司 | Vanadium titano-magnetite separation and extraction method |
| CN112410541A (en) * | 2021-01-25 | 2021-02-26 | 矿冶科技集团有限公司 | Preparation method of magnetic concentrate, magnetic concentrate and application thereof, and method for enriching heavy metal by metallization reduction of iron-containing multi-metal oxide ore |
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| CN105018721B (en) * | 2015-08-06 | 2018-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | It is a kind of that iron, vanadium, the method for titanium are separated from vanadium titano-magnetite |
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| CN1385397A (en) * | 2002-04-23 | 2002-12-18 | 重庆大学 | Technological method for preparing TiX (X=c,N) compound powder by direct reducing washingtonite |
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