CN105907956A - Low-grade chromium-containing vanadium titanium magnetite oxidized pellet and preparation method thereof - Google Patents
Low-grade chromium-containing vanadium titanium magnetite oxidized pellet and preparation method thereof Download PDFInfo
- Publication number
- CN105907956A CN105907956A CN201610486281.5A CN201610486281A CN105907956A CN 105907956 A CN105907956 A CN 105907956A CN 201610486281 A CN201610486281 A CN 201610486281A CN 105907956 A CN105907956 A CN 105907956A
- Authority
- CN
- China
- Prior art keywords
- low
- grade
- chromic vanadium
- titanium ferroferrite
- containing chromic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 239000008188 pellet Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 23
- 239000011651 chromium Substances 0.000 title claims abstract description 23
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000440 bentonite Substances 0.000 claims abstract description 35
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 35
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 35
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 33
- 239000012535 impurity Substances 0.000 claims abstract description 22
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 18
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 18
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 18
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 18
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 17
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims description 65
- 238000005453 pelletization Methods 0.000 claims description 34
- 230000001590 oxidative effect Effects 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 25
- 238000010792 warming Methods 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000013078 crystal Substances 0.000 abstract description 6
- 239000007791 liquid phase Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000009264 composting Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 239000002994 raw material Substances 0.000 description 10
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000010936 titanium Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- KEHCHOCBAJSEKS-UHFFFAOYSA-N iron(2+);oxygen(2-);titanium(4+) Chemical group [O-2].[O-2].[O-2].[Ti+4].[Fe+2] KEHCHOCBAJSEKS-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 238000004166 bioassay Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a low-grade chromium-containing vanadium titanium magnetite oxidized pellet containing 42.89-43.44wt.% of TFe and the following chemical components in percentage by weight:61.07-62.04% of Fe2O3, 0.07-0.14% of FeO, 3.42-3.50% of CaO, 7.89-8.60% of SiO2, 0.72-0.74% of MgO, 2.02-2.16% of Al2O3, 20.83-21.08% of TiO2, 1.60-1.62% of V2O5, 0.02-0.06% of Cr2O3, less than or equal to 0.032% of S, less than or equal to 0.002% of P and the balance of unavoidable impurities. A preparation method of the low-grade chromium-containing vanadium titanium magnetite oxidized pellet comprises the steps of mixing low-grade chromium-containing vanadium titanium magnetite powder and bentonite by adding water, and composting; preparing a green pellet; drying; and carrying out oxidation roasting to prepare the low-grade chromium-containing vanadium titanium magnetite oxidized pellet. A great deal of silicate is produced in the oxidized pellet prepared by using the method disclosed by the invention, so that a great number of liquid phases can be formed inside the pellet at relatively low temperature, the crystal connection degree of mineral powder particles is enhanced, and the quality and yield of the pellet are effectively improved.
Description
Technical field
The invention belongs to low-grade containing the technical field of blast furnace process in chromic vanadium-titanium ferroferrite method of comprehensive utilization, particularly to one
Plant low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof.
Background technology
Recently as the fast development of China's steel industry, supply falls short of demand for domestic Iron Ore Market, and low-grade containing chromium type vanadium titanium
Resource of magnetite is as a kind of iron ore deposit having Exploitative potential, and exploitation value is high, is expected to be sent to great expectations.Low-grade
Containing chromic vanadium-titanium ferroferrite as a kind of many metals intergrowth mineral, not only rich in ferrum, and rich in multiple strategies such as vanadium, titanium, chromium
Metal beneficial element, great Development volue.
The most to the research and utilization containing chromic vanadium-titanium ferroferrite that grade is higher, and to low-grade containing chromium type v-ti magnetite
The research in ore deposit just starts, and low-grade acid pellet Study on Preparation containing chromic vanadium-titanium ferroferrite is the deficientest.
In order to preferably carry out the low-grade research work containing chromic vanadium-titanium ferroferrite, formed low-grade containing chromic vanadium-titanium ferroferrite
Theoretical system, the blast furnace ironmaking work in the practice of more preferable Instructing manufacture.The present invention utilizes Ka Zuo somewhere, Liaoning the most extensive
It is low-grade containing raw material based on chromic vanadium-titanium ferroferrite that exploitation utilizes, and has invented one and can be used for preparing low-grade containing chromium type vanadium titanium
The new technology of magnetic iron ore acid pellet.
Summary of the invention
For the low-grade resources characteristic containing chromic vanadium-titanium ferroferrite and low-grade empty containing chromic vanadium-titanium ferroferrite oxide pelletizing process
White present situation, the present invention proposes a kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, and the method is passed through
Low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, after making green-ball, oxidizing roasting so that inside pelletizing when temperature is relatively low
Substantial amounts of liquid phase can be formed, so that the crystal stock degree of mineral powder granular is quickly strengthened so that under lower temperature, roasting obtains
Acid pellet comprcssive strength i.e. can reach more than 2000N, quality and the yield of pellet effectively improve.
The one of the present invention is low-grade containing chromic vanadium-titanium ferroferrite acid pellet, and the TFe comprised is 42.89～43.44wt.%, bag
The chemical composition contained and percentage by weight thereof be: Fe2O3: 61.07～62.04%, FeO:0.07～0.14%, CaO:3.42～3.50%,
SiO2: 7.89～8.60%, MgO:0.72～0.74%, Al2O3: 2.02～2.16%, TiO2: 20.83～21.08%, V2O5:
1.60～1.62%, Cr2O3: 0.02～0.06%, S≤0.032%, P≤0.002%, surplus is inevitable impurity.
The low-grade comprcssive strength containing chromic vanadium-titanium ferroferrite acid pellet of the present invention is 2000～7000N.
A kind of low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet of the present invention, comprises the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then stewing material 30～40min；Wherein,
The bentonite added accounts for low-grade containing the 0.8～2.0% of chromic vanadium-titanium ferroferrite grain weight amount, and the water of addition accounts for low-grade containing chromium type vanadium titanium
Magnetite powder and the 7.0 of bentonite gross weight～9.0%；
(2) pelletizing:
The material boiled in a covered pot over a slow fire is placed in disc balling machine, add water, prepared granularity be 8～15mm low-grade containing chromium type v-ti magnetite
Ore deposit green-ball；Wherein, prepare is low-grade containing in chromic vanadium-titanium ferroferrite green-ball, and the weight content of water is 8～10%；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 3～6h, and oven temperature is (100～200)
± 5 DEG C, the green-ball after being dried；
(4) oxidizing roasting:
High temperature Muffle furnace is warming up to 900 ± 5 DEG C, constant temperature 10～15min；
Being put in high temperature Muffle furnace by the low-grade green-ball containing chromic vanadium-titanium ferroferrite dried, be passed through flow is simultaneously
0.06～0.30m3The air of/h, carries out oxidizing roasting: high temperature Muffle furnace, with 4～6 DEG C/min speed, is warming up to 1075～1250 DEG C
After, it is incubated 5～30min；
By the pelletizing after oxidizing roasting, after being cooled to (700～900) ± 5 DEG C with stove, take out from high temperature Muffle furnace, air cooling to room temperature,
Prepare low-grade containing chromic vanadium-titanium ferroferrite acid pellet.
Wherein,
The described low-grade TFe containing chromic vanadium-titanium ferroferrite powder is 43.0～45.0wt.%, the chemical composition comprised and weight thereof
Percentage ratio is Fe3O4: 40.0～42.7%, FeO:17.0～19.0%, CaO:3.0～4.0%, SiO2: 6.5～7.5%, MgO:
0.6～0.8%, Al2O3: 1.5～2.1%, TiO2: 20.0～22.0%, V2O5: 1.6～1.8%, Cr2O3: 0.02～0.2%, S≤
0.05%, P≤0.01%, surplus is inevitable impurity.
Described low-grade containing in chromic vanadium-titanium ferroferrite powder, the part below granularity 200 mesh accounts for more than the 70% of gross weight, and 100
Part below mesh accounts for more than the 95% of gross weight.
Described bentonite, granularity is below 200 mesh.
The stewing material of described (1) refers to that the material plastic bag after adding water or plastic paper cover, and makes the uniform moisture in raw material, simultaneously
Moisture is tried one's best few scattering and disappearing.
In described (2), prepare low-grade containing chromic vanadium-titanium ferroferrite green-ball during, disc balling machine rotating speed is 16～20r/min,
Preparing mother bulb preparation time during green-ball is 7～15min, and preparing the green-ball time is 30～50min.
In described (2), the low-grade of preparation is 5～15 times/containing chromic vanadium-titanium ferroferrite shatter strength of green pellet, compression strength of green pel let
Be 10～30N/, it is ensured that intensity during sieving or transporting and do not rupture.
In described (4), high temperature Muffle furnace is warming up to 900 ± 5 DEG C with the programming rate of 8～12 DEG C/min.
By the low-grade internal macro morphology containing chromic vanadium-titanium ferroferrite acid pellet is observed, low-grade containing chromic vanadium-titanium ferroferrite
The vestige generating more amount of liquid phase during green-ball oxidizing roasting is obvious.Identical sintering temperature, roasting time obtain low-grade
(such as comprise chemical composition and percentage by weight is than high-grade containing chromic vanadium-titanium ferroferrite containing chromic vanadium-titanium ferroferrite acid pellet
TFe:62～63%, FeO:27～28%, CaO:0.2～0.3%, SiO2: 2～3%, MgO:0.6～0.9%, Al2O3: 3～5%,
TiO2: 4～6%, V2O5: 1～1.2%, Cr2O3: 0.5～0.6%, S≤0.16%, the high-grade of P≤0.02% vanadium titanium Han chromium type
Magnetic iron ore) acid pellet comprcssive strength improve more.From pelletizing microstructure it can be seen that compare the Gao Pin of other one-sizes
Position containing chromic vanadium-titanium ferroferrite (such as comprise chemical composition and percentage by weight be TFe:62～63%, FeO:27～28%, CaO:
0.2～0.3%, SiO2: 2～3%, MgO:0.6～0.9%, Al2O3: 3～5%, TiO2: 4～6%, V2O5: 1～1.2%, Cr2O3:
0.5～0.6%, S≤0.16%, the high-grade of P≤0.02% contains chromic vanadium-titanium ferroferrite) and pelletizing, (roasting during oxidizing roasting
Temperature is identical with roasting time) low-grade containing the internal amount of liquid phase showed increased produced of chromic vanadium-titanium ferroferrite pelletizing, pelletizing chats
The internal crystal stock effect of powder particles is preferably promoted, pelletizing interior solid is remarkably reinforced, and hole significantly reduces.
The present invention's is low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, compared to prior art, and its useful effect
Fruit is:
1, pellet roasting temperature is low, and roasting time is short (if another high-grade is containing chromic vanadium-titanium ferroferrite, the composition comprised
It is TFe:62～63% by mass percentage, FeO:27～28%, CaO:0.2～0.3%, SiO2: 2～3%, MgO:0.6～0.9%,
Al2O3: 3～5%, TiO2: 4～6%, V2O5: 1～1.2%, Cr2O3: 0.5～0.6%, S≤0.16%, P≤0.02%, and
Needing ＞ 1250 DEG C with addition of the sintering temperature needed for the roasting of general ore deposit, even need 1300 DEG C, constant temperature time at least needs 20min, even reaches
To more than 40min).Lower sintering temperature and roasting time greatly reduce low-grade containing chromic vanadium-titanium ferroferrite acid pellet system
Standby energy consumption, has saved cost；
2, make use of problem that is low-grade containing chromic vanadium-titanium ferroferrite resource, that alleviate the shortage of domestic high-grade iron mine, simultaneously
It is beneficial to efficiently utilize strategy metal Cr, V and Ti；
3, the present invention does not allocates the additive of any raising pelletizing comprcssive strength in breeze into and i.e. can reach and meet blast furnace feeding requirement
Pelletizing compressive strength standard.Due to the basic anhydride such as more CaO and SiO2Existence, low-grade containing chromic vanadium-titanium ferroferrite
Green-ball, in lower temperature and short period oxidizing roasting, it is thus achieved that acid pellet in have the material such as silicate of a large amount of low melting point raw
Become so that substantial amounts of liquid phase can be formed inside pelletizing when temperature is relatively low, so that the crystal stock degree of mineral powder granular quickly obtains
Strengthen；
4, the comprcssive strength of acid pellet brings up to more than 2000N, reaches the requirement of blast fumance, well solves titaniferous
Higher (TiO2＞ 18%) the acid pellet comprcssive strength containing chromic vanadium-titanium ferroferrite do not reach the problem of blast fumance technological requirement,
It is effectively improved quality and the yield of pellet.
Accompanying drawing explanation
Fig. 1 is the low-grade XRD figure spectrum containing chromic vanadium-titanium ferroferrite acid pellet prepared by the present invention；
Fig. 2 is the low-grade ore deposit phasor containing chromic vanadium-titanium ferroferrite acid pellet of the embodiment of the present invention 2 preparation, and (a) amplifies 500
Times；B () amplifies 10000 times；
Fig. 3 is the ore deposit phasor that high-grade contains chromic vanadium-titanium ferroferrite acid pellet, and (a) amplifies 300 times；B () amplifies 500 times.
Detailed description of the invention
The embodiment of the present invention low-grade containing chromic vanadium-titanium ferroferrite powder from Ka Zuo somewhere, Liaoning.
The low-grade TFe containing chromic vanadium-titanium ferroferrite powder that the embodiment of the present invention is selected is 43.0～45.0wt.%, the composition comprised
It is Fe by weight percentage3O4: 40.0～42.7%, FeO:17.0～19.0%, CaO:3.0～4.0%, SiO2: 6.5～7.5%,
MgO:0.6～0.8%, Al2O3: 1.5～2.1%, TiO2: 20.0～22.0%, V2O5: 1.6～1.8%, Cr2O3: 0.02～0.2%,
S≤0.05%, P≤0.01%, surplus is inevitable impurity.
The bentonite of the embodiment of the present invention is commercial products.
In the embodiment of the present invention, testing the low-grade equipment containing chromic vanadium-titanium ferroferrite acid pellet comprcssive strength is pelletizing pressure resistance
Degree analyzer.
In the embodiment of the present invention, the low-grade compressive strength determination containing chromic vanadium-titanium ferroferrite acid pellet uses bioassay standard
GB/T 14201-93 " iron ore pellets compressive strength determination method " is measured, low-grade containing chromic vanadium-titanium ferroferrite acid pellet
Comprcssive strength draws by measuring three groups of samples, and often group is chosen 22 samples and removes maximum and minima.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
30min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 2.0% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
7.0%；
(2) pelletizing:
It is in 16r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 7min, preparation
The time 30min of green-ball, prepared granularity be 8～10mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare is low
Grade is containing in chromic vanadium-titanium ferroferrite green-ball, and the weight content of water is 8%；The low-grade green-ball containing chromic vanadium-titanium ferroferrite of preparation falls
Lower intensity is 5 times/, and compression strength of green pel let is 10N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 6h, and oven temperature is 100 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 8 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 10min；Low-grade by dry
The green-ball containing chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.06m simultaneously3The air of/h, carries out oxidizing roasting:
High temperature Muffle furnace is with 4 DEG C/min speed, after being warming up to 1075 DEG C, is incubated 30min；
By the pelletizing after oxidizing roasting, after being cooled to 900 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 42.89wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 61.07%, FeO:0.09%, CaO:3.45%, SiO2: 8.58%, MgO:0.74%, Al2O3: 2.16%,
TiO2: 21.08%, V2O5: 1.61%, Cr2O3: 0.03%, S:0.032%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 2571N, and its XRD figure is shown in Fig. 1.
Embodiment 2
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
35min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 1.0% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
7.0%；
(2) pelletizing:
It is in 20r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 10min, system
The time 35min of standby green-ball, prepared granularity be 10～13mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare
Low-grade containing in chromic vanadium-titanium ferroferrite green-ball, the weight content of water is 8%；That prepares is low-grade containing chromic vanadium-titanium ferroferrite green-ball
Drop strength is 8 times/, and compression strength of green pel let is 20N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 5h, and oven temperature is 105 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 12 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 15min；The low product that will dry
Position green-ball Han chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.30m simultaneously3The air of/h, carries out oxidation roasting
Burn: high temperature Muffle furnace is with 5 DEG C/min speed, after being warming up to 1100 DEG C, be incubated 20min；
By the pelletizing after oxidizing roasting, after being cooled to 800 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 43.34wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 61.72%, FeO:0.10%, CaO:3.49%, SiO2: 8.00%, MgO:0.72%, Al2O3: 2.05%,
TiO2: 20.85%, V2O5: 1.62%, Cr2O3: 0.02%, S:0.030%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 3645N.
Low-grade ore deposit phasor containing chromic vanadium-titanium ferroferrite acid pellet is as in figure 2 it is shown, from Fig. 2 (b) middle-low grade vanadium Han chromium type
The ore deposit phasor of titanomagnetite acid pellet is it is apparent that the crystal stock effect of mineral powder granular is obvious, and preferably crystal stock degree pole
The earth promotes the raising of pelletizing comprcssive strength, and wherein A and B is iron titanium oxide, and in B, Ti content is compared Ti in A and contained
Measuring higher, C is the iron oxides containing a small amount of Ti, and D is iron titanium oxide.
The high-grade ore deposit phasor containing chromic vanadium-titanium ferroferrite acid pellet is as it is shown on figure 3, with Fig. 2 contrast it can be seen that low-grade
Containing chromic vanadium-titanium ferroferrite acid pellet, the internal amount of liquid phase showed increased produced of pelletizing, pelletizing interior solid is remarkably reinforced,
Hole significantly reduces.
Embodiment 3
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
40min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 1.2% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
8.0%；
(2) pelletizing:
It is in 16r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 15min, system
The time 40min of standby green-ball, prepared granularity be 13～15mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare
Low-grade containing in chromic vanadium-titanium ferroferrite green-ball, the weight content of water is 9%；That prepares is low-grade containing chromic vanadium-titanium ferroferrite green-ball
Drop strength is 8 times/, and compression strength of green pel let is 15N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 4h, and oven temperature is 150 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 9 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 10min；Low-grade by dry
The green-ball containing chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.25m simultaneously3The air of/h, carries out oxidizing roasting:
High temperature Muffle furnace is with 6 DEG C/min speed, after being warming up to 1100 DEG C, is incubated 25min；
By the pelletizing after oxidizing roasting, after being cooled to 700 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 43.25wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 61.62%, FeO:0.09%, CaO:3.48%, SiO2: 8.12%, MgO:0.72%, Al2O3: 2.07%,
TiO2: 20.83%, V2O5: 1.62%, Cr2O3: 0.04%, S:0.030%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 4188N.
Embodiment 4
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
35min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 1.2% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
9.0%；
(2) pelletizing:
It is in 16r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 15min, system
The time 50min of standby green-ball, prepared granularity be 10～13mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare
Low-grade containing in chromic vanadium-titanium ferroferrite green-ball, the weight content of water is 10%；That prepares is low-grade raw containing chromic vanadium-titanium ferroferrite
Ball drop strength is 15 times/, and compression strength of green pel let is 30N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 3h, and oven temperature is 200 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 8 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 10min；Low-grade by dry
The green-ball containing chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.06m simultaneously3The air of/h, carries out oxidizing roasting:
High temperature Muffle furnace is with 6 DEG C/min speed, after being warming up to 1125 DEG C, is incubated 15min；
By the pelletizing after oxidizing roasting, after being cooled to 900 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 43.25wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 61.59%, FeO:0.09%, CaO:3.48%, SiO2: 8.12%, MgO:0.72%, Al2O3: 2.07%,
TiO2: 20.83%, V2O5: 1.62%, Cr2O3: 0.04%, S:0.030%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 4253N.
Embodiment 5
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
35min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 0.8% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
9.0%；
(2) pelletizing:
It is in 16r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 10min, system
The time 30min of standby green-ball, prepared granularity be 9～12mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare
Low-grade containing in chromic vanadium-titanium ferroferrite green-ball, the weight content of water is 10%；That prepares is low-grade raw containing chromic vanadium-titanium ferroferrite
Ball drop strength is 7 times/, and compression strength of green pel let is 18N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 5h, and oven temperature is 150 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 10 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 10min；The low product that will dry
Position green-ball Han chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.12m simultaneously3The air of/h, carries out oxidation roasting
Burn: high temperature Muffle furnace is with 6 DEG C/min speed, after being warming up to 1150 DEG C, be incubated 20min；
By the pelletizing after oxidizing roasting, after being cooled to 800 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 43.44wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 62.04%, FeO:0.14%, CaO:3.50%, SiO2: 7.89%, MgO:0.72%, Al2O3: 2.02%,
TiO2: 20.89%, V2O5: 1.62%, Cr2O3: 0.04%, S:0.029%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 4852N.
Embodiment 6
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
35min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 1.5% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
9.0%；
(2) pelletizing:
It is in 16r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 10min, system
The time 30min of standby green-ball, prepared granularity be 13～15mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare
Low-grade containing in chromic vanadium-titanium ferroferrite green-ball, the weight content of water is 10%；That prepares is low-grade raw containing chromic vanadium-titanium ferroferrite
Ball drop strength is 5 times/, and compression strength of green pel let is 10N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 5h, and oven temperature is 200 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 8 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 10min；Low-grade by dry
The green-ball containing chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.15m simultaneously3The air of/h, carries out oxidizing roasting:
High temperature Muffle furnace is with 6 DEG C/min speed, after being warming up to 1200 DEG C, is incubated 10min；
By the pelletizing after oxidizing roasting, after being cooled to 700 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 43.13wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 61.49%, FeO:0.08%, CaO:3.47%, SiO2: 8.30%, MgO:0.73%, Al2O3: 2.11%,
TiO2: 20.97%, V2O5: 1.61%, Cr2O3: 0.03%, S:0.031%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 2899N.
Embodiment 7
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
35min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 1.8% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
9.0%；
(2) pelletizing:
It is in 16r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 10min, system
The time 30min of standby green-ball, prepared granularity be 10～13mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare
Low-grade containing in chromic vanadium-titanium ferroferrite green-ball, the weight content of water is 10%；That prepares is low-grade raw containing chromic vanadium-titanium ferroferrite
Ball drop strength is 13 times/, and compression strength of green pel let is 22N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 3h, and oven temperature is 150 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 8 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 10min；Low-grade by dry
The green-ball containing chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.06m simultaneously3The air of/h, carries out oxidizing roasting:
High temperature Muffle furnace is with 6 DEG C/min speed, after being warming up to 1250 DEG C, is incubated 5min；
By the pelletizing after oxidizing roasting, after being cooled to 900 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 43.02wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 61.36%, FeO:0.09%, CaO:3.46%, SiO2: 8.45%, MgO:0.73%, Al2O3: 2.12%,
TiO2: 21.00%, V2O5: 1.60%, Cr2O3: 0.05%, S:0.032%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 3119N.
Embodiment 8
A kind of low-grade containing chromic vanadium-titanium ferroferrite acid pellet and preparation method thereof, comprise the following steps:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then cover with plastic bag, stewing material
40min, makes the uniform moisture in raw material, makes moisture try one's best few scattering and disappearing simultaneously；Wherein, the bentonite of addition accounts for low-grade containing
The 2.0% of chromic vanadium-titanium ferroferrite grain weight amount, the water of addition accounts for low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite gross weight
9.0%；
(2) pelletizing:
It is in 18r/min disc balling machine that the material boiled in a covered pot over a slow fire is placed in rotating speed, adds water, and the time preparing mother bulb is 10min, system
The time 40min of standby green-ball, prepared granularity be 10～13mm low-grade containing chromic vanadium-titanium ferroferrite green-ball；Wherein, prepare
Low-grade containing in chromic vanadium-titanium ferroferrite green-ball, the weight content of water is 10%；That prepares is low-grade raw containing chromic vanadium-titanium ferroferrite
Ball drop strength is 13 times/, and compression strength of green pel let is 25N/；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 4h, and oven temperature is 150 ± 5 DEG C,
Green-ball after being dried；
(4) oxidizing roasting:
By high temperature Muffle furnace, it is that 10 DEG C/min is warming up to 900 ± 5 DEG C with programming rate, constant temperature 15min；The low product that will dry
Position green-ball Han chromic vanadium-titanium ferroferrite is put in high temperature Muffle furnace, and be passed through flow is 0.15m simultaneously3The air of/h, carries out oxidation roasting
Burn: high temperature Muffle furnace is with 5 DEG C/min speed, after being warming up to 1250 DEG C, be incubated 20min；
By the pelletizing after oxidizing roasting, after being cooled to 900 ± 5 DEG C with stove, taking out from high temperature Muffle furnace, air cooling, to room temperature, prepares
Low-grade containing chromic vanadium-titanium ferroferrite acid pellet, its TFe is 42.92wt.%, the chemical composition comprised and percentage by weight thereof
For: Fe2O3: 61.22%, FeO:0.07%, CaO:3.42%, SiO2: 8.60%, MgO:0.74%, Al2O3: 2.16%,
TiO2: 21.04%, V2O5: 1.60%, Cr2O3: 0.06%, S:0.030%, P:0.002%, surplus is inevitable
Impurity, wherein, inevitable impurity is MnO, NiO, Na2O、K2O, CuO etc..Low-grade containing chromium type v-ti magnetite
The comprcssive strength of ore deposit acid pellet is 3942N, the most individual other single pressure resistance of the low-grade acid pellet containing chromic vanadium-titanium ferroferrite
Degree can reach 7000N.
Claims (10)
1. one kind low-grade containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that its TFe comprised is
42.89～43.44wt.%, the chemical composition comprised and percentage by weight thereof be: Fe2O3: 61.07～62.04%, FeO:0.07～0.14%,
CaO:3.42～3.50%, SiO2: 7.89～8.60%, MgO:0.72～0.74%, Al2O3: 2.02～2.16%, TiO2:
20.83～21.08%, V2O5: 1.60～1.62%, Cr2O3: 0.02～0.06%, S≤0.032%, P≤0.002%, surplus is not
Evitable impurity.
The most low-grade containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that described is low-grade
Comprcssive strength containing chromic vanadium-titanium ferroferrite acid pellet is 2000～7000N.
3. the low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet of claim 1, it is characterised in that include following
Step:
(1) batch mixing:
Add water low-grade containing chromic vanadium-titanium ferroferrite powder and bentonite, mix homogeneously, then stewing material 30～40min；Wherein,
The bentonite added accounts for low-grade containing the 0.8～2.0% of chromic vanadium-titanium ferroferrite grain weight amount, and the water of addition accounts for low-grade containing chromium type vanadium titanium
Magnetite powder and the 7.0 of bentonite gross weight～9.0%；
(2) pelletizing:
The material boiled in a covered pot over a slow fire is placed in disc balling machine, add water, prepared granularity be 8～15mm low-grade containing chromium type v-ti magnetite
Ore deposit green-ball；Wherein, prepare is low-grade containing in chromic vanadium-titanium ferroferrite green-ball, and the weight content of water is 8～10%；
(3) dry:
Being put in baking oven by the low-grade green-ball containing chromic vanadium-titanium ferroferrite, drying time is 3～6h, and oven temperature is (100～200)
± 5 DEG C, the green-ball after being dried；
(4) oxidizing roasting:
High temperature Muffle furnace is warming up to 900 ± 5 DEG C, constant temperature 10～15min；
Being put in high temperature Muffle furnace by the low-grade green-ball containing chromic vanadium-titanium ferroferrite dried, be passed through flow is simultaneously
0.06～0.30m3The air of/h, carries out oxidizing roasting: high temperature Muffle furnace, with 4～6 DEG C/min speed, is warming up to 1075～1250 DEG C
After, it is incubated 5～30min；
By the pelletizing after oxidizing roasting, after being cooled to (700～900) ± 5 DEG C with stove, take out from high temperature Muffle furnace, air cooling to room temperature,
Prepare low-grade containing chromic vanadium-titanium ferroferrite acid pellet.
The most low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that institute
The low-grade TFe containing chromic vanadium-titanium ferroferrite powder stated is 43.0～45.0wt.%, and the chemical composition comprised and percentage by weight thereof are
Fe3O4: 40.0～42.7%, FeO:17.0～19.0%, CaO:3.0～4.0%, SiO2: 6.5～7.5%, MgO:0.6～0.8%,
Al2O3: 1.5～2.1%, TiO2: 20.0～22.0%, V2O5: 1.6～1.8%, Cr2O3: 0.02～0.2%, S≤0.05%, P
≤ 0.01%, surplus is inevitable impurity.
The most low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that institute
State low-grade containing in chromic vanadium-titanium ferroferrite powder, the part below granularity 200 mesh accounts for more than the 70% of gross weight, 100 mesh with
Under part account for more than the 95% of gross weight.
The most low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that institute
The bentonite stated, granularity is below 200 mesh.
The most low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that institute
The stewing material stating (1) refers to that the material plastic bag after adding water or plastic paper cover.
The most low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that institute
State in (2), prepare low-grade containing chromic vanadium-titanium ferroferrite green-ball during, disc balling machine rotating speed is 16～20r/min, and preparation is raw
During ball, mother bulb preparation time is 7～15min, and preparing the green-ball time is 30～50min.
The most low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that institute
State prepared by (2) low-grade be 5～15 times/containing chromic vanadium-titanium ferroferrite shatter strength of green pellet, compression strength of green pel let is 10～30N/
Individual.
The most low-grade preparation method containing chromic vanadium-titanium ferroferrite acid pellet, it is characterised in that institute
Stating in (4), high temperature Muffle furnace is warming up to 900 ± 5 DEG C with the programming rate of 8～12 DEG C/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610486281.5A CN105907956B (en) | 2016-06-27 | 2016-06-27 | A kind of low-grade acid pellet containing chromic vanadium-titanium ferroferrite and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610486281.5A CN105907956B (en) | 2016-06-27 | 2016-06-27 | A kind of low-grade acid pellet containing chromic vanadium-titanium ferroferrite and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105907956A true CN105907956A (en) | 2016-08-31 |
| CN105907956B CN105907956B (en) | 2017-11-03 |
Family
ID=56758794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610486281.5A Expired - Fee Related CN105907956B (en) | 2016-06-27 | 2016-06-27 | A kind of low-grade acid pellet containing chromic vanadium-titanium ferroferrite and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105907956B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350660A (en) * | 2016-11-29 | 2017-01-25 | 江苏省冶金设计院有限公司 | Method for preparing full-vanadium-titanium pellets |
| CN107267748A (en) * | 2017-06-14 | 2017-10-20 | 东北大学 | A kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107287412A (en) * | 2017-06-14 | 2017-10-24 | 东北大学 | A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107475514A (en) * | 2017-07-26 | 2017-12-15 | 东北大学 | A kind of preparation method of high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107881337A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that high-chromic vanadium-titanium ferroferrite prepares pellet with addition of ilmenite |
| CN107881336A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares pellet with addition of chromite |
| CN107881335A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares pellet with addition of ilmenite |
| CN107937715A (en) * | 2017-11-19 | 2018-04-20 | 东北大学 | A kind of method that high-chromic vanadium-titanium ferroferrite prepares pellet with addition of chromite |
| CN109576490A (en) * | 2019-02-01 | 2019-04-05 | 东北大学 | A kind of method that additional calcium carbonate prepares high alkalinity full vanadium-titanium pellet containing chromium |
| CN109666790A (en) * | 2019-02-01 | 2019-04-23 | 东北大学 | A method of using calcium oxide prepare in the full vanadium titanium self fluxed pellet of low alkalinity |
| CN109852790A (en) * | 2019-02-01 | 2019-06-07 | 东北大学 | A method of middle low alkalinity is prepared containing the full vanadium titanium self fluxed pellet of chromium |
| CN109852791A (en) * | 2019-02-01 | 2019-06-07 | 东北大学 | A method of high alkalinity pellet containing Cr-V-Ti is prepared using calcium oxide |
| CN110484721A (en) * | 2019-09-11 | 2019-11-22 | 中南大学 | A kind of preparation method of low reduction degradation V-ti Bearing Magnetite Pellets |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302580A (en) * | 2008-07-07 | 2008-11-12 | 攀钢集团研究院有限公司 | Preparation of all-sefstromite concentrate pellet ore |
| CN102220486A (en) * | 2011-06-22 | 2011-10-19 | 攀钢集团有限公司 | Acidic full-vanadium-titanium pellets and preparation method thereof |
| CN102242251A (en) * | 2011-06-22 | 2011-11-16 | 攀钢集团有限公司 | Alkaline V-Ti pellet and preparation method thereof |
| CN102776364A (en) * | 2012-08-16 | 2012-11-14 | 中冶北方（大连）工程技术有限公司 | Process for recovering titanium and iron from titanomagnetite tailings |
| CN103695633A (en) * | 2014-01-07 | 2014-04-02 | 攀枝花钢企米易白马球团有限公司 | Titanium-rich pellet and production method thereof |
| CN104911342A (en) * | 2015-07-13 | 2015-09-16 | 东北大学 | Method for preparing chromium vanadium titano-magnetite pellets containing boron |
-
2016
- 2016-06-27 CN CN201610486281.5A patent/CN105907956B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302580A (en) * | 2008-07-07 | 2008-11-12 | 攀钢集团研究院有限公司 | Preparation of all-sefstromite concentrate pellet ore |
| CN102220486A (en) * | 2011-06-22 | 2011-10-19 | 攀钢集团有限公司 | Acidic full-vanadium-titanium pellets and preparation method thereof |
| CN102242251A (en) * | 2011-06-22 | 2011-11-16 | 攀钢集团有限公司 | Alkaline V-Ti pellet and preparation method thereof |
| CN102776364A (en) * | 2012-08-16 | 2012-11-14 | 中冶北方（大连）工程技术有限公司 | Process for recovering titanium and iron from titanomagnetite tailings |
| CN103695633A (en) * | 2014-01-07 | 2014-04-02 | 攀枝花钢企米易白马球团有限公司 | Titanium-rich pellet and production method thereof |
| CN104911342A (en) * | 2015-07-13 | 2015-09-16 | 东北大学 | Method for preparing chromium vanadium titano-magnetite pellets containing boron |
Non-Patent Citations (1)
| Title |
|---|
| 朱德庆等: "低品位赤铁矿直接还原过程中铁精粒的长大行为", 《中国有色金属学报》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350660A (en) * | 2016-11-29 | 2017-01-25 | 江苏省冶金设计院有限公司 | Method for preparing full-vanadium-titanium pellets |
| CN107267748B (en) * | 2017-06-14 | 2018-08-28 | 东北大学 | A kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107267748A (en) * | 2017-06-14 | 2017-10-20 | 东北大学 | A kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107287412A (en) * | 2017-06-14 | 2017-10-24 | 东北大学 | A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| WO2018228156A1 (en) * | 2017-06-14 | 2018-12-20 | 东北大学 | High-vanadium and high-chromium type vanadium-titanium magnetite pellet |
| CN107287412B (en) * | 2017-06-14 | 2018-10-23 | 东北大学 | A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107475514A (en) * | 2017-07-26 | 2017-12-15 | 东北大学 | A kind of preparation method of high-chromic vanadium-titanium ferroferrite pelletizing |
| CN107881337A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that high-chromic vanadium-titanium ferroferrite prepares pellet with addition of ilmenite |
| CN107937715A (en) * | 2017-11-19 | 2018-04-20 | 东北大学 | A kind of method that high-chromic vanadium-titanium ferroferrite prepares pellet with addition of chromite |
| CN107881335A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares pellet with addition of ilmenite |
| CN107881336A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares pellet with addition of chromite |
| CN109576490A (en) * | 2019-02-01 | 2019-04-05 | 东北大学 | A kind of method that additional calcium carbonate prepares high alkalinity full vanadium-titanium pellet containing chromium |
| CN109666790A (en) * | 2019-02-01 | 2019-04-23 | 东北大学 | A method of using calcium oxide prepare in the full vanadium titanium self fluxed pellet of low alkalinity |
| CN109852790A (en) * | 2019-02-01 | 2019-06-07 | 东北大学 | A method of middle low alkalinity is prepared containing the full vanadium titanium self fluxed pellet of chromium |
| CN109852791A (en) * | 2019-02-01 | 2019-06-07 | 东北大学 | A method of high alkalinity pellet containing Cr-V-Ti is prepared using calcium oxide |
| CN109666790B (en) * | 2019-02-01 | 2020-04-14 | 东北大学 | Method for preparing full vanadium-titanium self-fluxing pellet with medium and low alkalinity by using calcium oxide |
| CN110484721A (en) * | 2019-09-11 | 2019-11-22 | 中南大学 | A kind of preparation method of low reduction degradation V-ti Bearing Magnetite Pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105907956B (en) | 2017-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105907956A (en) | Low-grade chromium-containing vanadium titanium magnetite oxidized pellet and preparation method thereof | |
| CN105907948B (en) | The method of the low-grade magnetic separation of metallized pellet containing chromic vanadium-titanium ferroferrite separation | |
| CN103667572B (en) | The gas-based shaft kiln directly reduced smelting process of a kind of high-chromic vanadium-titanium ferroferrite | |
| CN102399998B (en) | Method for reducing and smelting titania slag by utilizing vanadium-titanium-iron ore concentrates in molten state | |
| CN106995879A (en) | A kind of low-grade Oxidation Leaching of sodium containing chromic vanadium-titanium ferroferrite extraction vanadium method | |
| CN104388679A (en) | Method for extracting vanadium from vanadium-containing raw material | |
| CN102923774B (en) | Method for adding high-calcium vanadium slag to perform sodium salt roasting | |
| CN108929951A (en) | A kind of utilization method of v-ti magnetite concentrate | |
| CN107082429A (en) | A kind of method that utilization Dust of Iron And Steel Works prepares cementite | |
| CN102505061A (en) | Method for preparing titanium-rich materials and granular irons by directly reducing titanic iron ore | |
| CN107475514A (en) | A kind of preparation method of high-chromic vanadium-titanium ferroferrite pelletizing | |
| CN109055734A (en) | Preparation method of composite pellet for protecting blast furnace | |
| CN108677022A (en) | A kind of method that sintering dust separation ash prepares removing harmful element during cementite | |
| CN107267766A (en) | A kind of method of Selective Separation vanadium, titanium, iron from modified vanadium slag | |
| CN103103347A (en) | Method for preparing blast furnace ironmaking burden from full-vanadium titanium magnetite concentrate | |
| CN101899604B (en) | Direct alloying steelmaking process for manganese oxide composite briquettes used for re-blowing revolving furnace | |
| CN104561526A (en) | High-all-vanadium sodium modification roasting method | |
| CN104911342B (en) | A kind of preparation method of the pelletizing containing chromic vanadium-titanium ferroferrite of boracic | |
| CN107881335A (en) | A kind of method that low chromium type vanadium titano-magnetite prepares pellet with addition of ilmenite | |
| CN106957958A (en) | A kind of method of the low-grade Oxidation Leaching of calcification containing chromic vanadium-titanium ferroferrite vanadium extraction | |
| CN107254590A (en) | A kind of method that W metallurgy is refined using low-grade tungsten mining and metallurgy | |
| CN106222402A (en) | A kind of production method of ilmenite concentrate pelletizing | |
| CN110042195A (en) | The method that molten iron adds lime production calcic vanadium slag and directly leaches vanadium extraction | |
| CN110042194A (en) | The production of converter calcic vanadium slag and its subsequent leaching extraction vanadium method | |
| CN103509934A (en) | Method for producing austenitic stainless steel by using nickel and chromium ores |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171103 |