CN107287412A - A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing - Google Patents
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing Download PDFInfo
- Publication number
- CN107287412A CN107287412A CN201710447611.4A CN201710447611A CN107287412A CN 107287412 A CN107287412 A CN 107287412A CN 201710447611 A CN201710447611 A CN 201710447611A CN 107287412 A CN107287412 A CN 107287412A
- Authority
- CN
- China
- Prior art keywords
- vanadium
- titanium ferroferrite
- chromic
- pelletizing
- chromic vanadium
- 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
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
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
Abstract
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, the technical field of blast furnace process belonged in high vanadium high-chromic vanadium-titanium ferroferrite method of comprehensive utilization.High vanadium high-chromic vanadium-titanium ferroferrite pelletizing is made by moistening mill to the high vanadium high-chromic vanadium-titanium ferroferrite of import, being mixed according to pellet feed proportioning progress dispensing, by raw material stoving plus bottom water batch mixing, stewing material, progress pelletizing, the green-ball that 8~16mm is obtained to green-ball screening and then drying pre-oxidation, shaft roasting, cooling in the preparation method.It this method solve pellet easily to superfuse, so as to lump or dross, the problem of influenceing finished ball yield and quality efficiently and effectively improves quality of green pellets, it is ensured that pellet yield and quality.
Description
Technical field
The invention belongs to the technical field of blast furnace process in high vanadium high-chromic vanadium-titanium ferroferrite method of comprehensive utilization, especially relate to
And a kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing.
Background technology
As domestic iron ore supply demand gap increasingly becomes big, source and the exploitation height of iron ore deposit are badly in need of expanding in iron and steel enterprise
Added value vanadium chromium product, import Foreign iron ore resource becomes a kind of trend, and the high vanadium high-chromic vanadium-titanium ferroferrite of import is a kind of
Many metal intergrowth minerals rich in a variety of valuable constituent elements such as iron, vanadium, titanium, chromium, application value is high, but its mineral composition complexity,
Comprehensively utilize difficulty big, in the prior art, heat supply duty should not be determined during shaft roasting, be easily caused the high vanadium Gao Ge of import
Type V-ti Bearing Magnetite Pellets are superfused, and occur caking or dross, influence the production of the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of finished product import
Amount and quality.So as to influence the improvement of blast furnace process index and the raising of ironmaking technology.
The content of the invention
There is pellet the present invention is to solve the technique of the existing preparation high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of import
Easily superfuse, so that lump or dross, the problem of influenceing finished ball yield and quality, and a kind of high vanadium high-chromic vanadium titanium is provided
The preparation method of Magnetite Pellets.This method efficiently and effectively improves quality of green pellets, it is ensured that pellet yield and quality.
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of the present invention, is realized by following steps：
Step 1, profit mill
High vanadium high-chromic vanadium-titanium ferroferrite is subjected to profit mill, profit time consuming is 5~15min, and the high vanadium being made after profit mill is high
Chromic vanadium-titanium ferroferrite powder, its fineness is -200 mesh >=90%；
Wherein, described profit mill uses damp mill, wherein, the technological parameter of damp mill is：Cylinder number of moving part is 14.3
~21.95r/min, the material ball ratio of damp mill is：(3.4~11.3)：(24~83)；
Step 2, dispensing
According to the raw material composition and its ratio of weight and number of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, raw material is weighed, mixing is equal
It is even, obtain mixed material；
Wherein, high vanadium high-chromic vanadium-titanium ferroferrite pelletizing by profit mill after high vanadium high-chromic vanadium-titanium ferroferrite powder, iron charge and
Bentonite is prepared from, wherein, the ratio of weight and number of each composition is：
High vanadium high-chromic vanadium-titanium ferroferrite powder after profit mill：51~56 parts, iron charge：44~49 parts, bentonite：0.8~1.1
Part；
High vanadium high-chromic vanadium-titanium ferroferrite powder after described profit mill is that the high vanadium high-chromic vanadium-titanium ferroferrite of import is moistened
The high vanadium high-chromic vanadium-titanium ferroferrite powder that obtained fineness is -200 mesh >=90% is ground, its TFe included is 61~63wt.%,
Comprising chemical composition and its mass percent be：FeO：26~28%, Fe3O4：54.06~58.97%, V2O5：0.9~
1.1%, TiO2：4.5~5.5%, Cr2O3：0.45~0.85%, CaO：0.16~0.26%, SiO2：2~3%, MgO：0.5
~1.0%, Al2O3：2.5~4.0%, surplus is inevitable impurity；
The composition and its parts by weight that described iron charge contains be：Common Iron Ore Powder：70~100 parts；Common superfine iron powder：
0~30 part；
Wherein, particle diameter≤0.5mm of common Iron Ore Powder accounts for 90%, and its maximum particle diameter≤3mm；
The fineness of common superfine iron powder is -325 mesh >=85% or -200 mesh >=95%；
The mesh of described bentonitic granularity≤200, its composition contained and its mass percent are：SiO2：66~69%,
Al2O3：13~16%, MgO：4~5%, CaO：2~3%, Na2O≤1.7%, K2O≤1.2%, surplus is inevitably miscellaneous
Matter.
Step 3, dry
It is 6~8%, the mixed material after being dried that mixed material, which is dried to mixed material moisture content,；
Plus bottom water batch mixing, stewing material step 4,
Mixed material after drying is added into water, and is well mixed, 30~50min of material is then boiled in a covered pot over a slow fire, obtains the material boiled in a covered pot over a slow fire；Its
In, it is 1.8~2.2% of the mixed material quality after drying to add the amount of water；
Step 5, pelletizing and screening
The material boiled in a covered pot over a slow fire is placed in disc balling machine, water is added so that high vanadium high-chromic vanadium-titanium ferroferrite green-ball moisture content
Control carries out pelletizing 9~11%, by screening, obtains the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 8~16mm；
Step 6, drying pre-oxidation
Granularity is uniformly distributed into shaft furnace furnace roof by material distributing machine for 8~16mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball
In the drying bed at place, the pre- thermal oxide of drying and dewatering is passed through in drying bed, the high vanadium high-chromic vanadium titanium magnetic of drying pre-oxidation is obtained
Iron ore pellets, wherein, drying bed temperature control is 650~750 DEG C, petticoat pipe temperature control is 160~210 DEG C, thickness of feed layer control
100~140mm, drying time are made as 5~9min；
Step 7, shaft roasting
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing for drying pre-oxidation is placed in shaft furnace and is calcined, after being calcined
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing；Its roasting technique is：Chamber temperature is 1150~1250 DEG C, chamber pressure is 7
~11kPa, gas pressure are that 18~20kPa, combustion-supporting wind pressure are 16~18kPa, and roasting time is 10~18min；
Step 8, cool down
By the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting, after furnace cooling, from the discharge of vertical furnace bottom, high vanadium is obtained
High-chromic vanadium-titanium ferroferrite pelletizing.
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing prepared, its TFe included is 61.88~64.22wt.%, comprising
Chemical composition and its mass percent are：Fe2O3：87.51~91.41%, FeO：0.3~0.8%, V2O5：0.45~
0.62%, TiO2：2.29~3.20%, Cr2O3：0.22~0.48%, CaO：0.11~0.63%, SiO2：3.18~
4.77%, MgO：0.32~0.89%, Al2O3：1.62~4.0%, surplus is inevitable impurity.
The green-ball granularity of the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing prepared is 8~16mm, and shatter strength of green pellet is >=4
It is secondary/, compression strength >=10N/, dry pre-oxidation high vanadium high-chromic vanadium-titanium ferroferrite pelletizing compression strength for >=
300N/, the compression strength of the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting is >=2200N/, the reduction swellability of pelletizing
Rate≤16.4%.
In described step 3, the concrete operation method of described drying is：Mixed material is placed in drying box, 90
~110 DEG C are dried, until mixed material moisture content is 6~8%.
In described step 4, the mode of described addition water is added water using atomization.
In described step 4, described stewing material refers to the mixed material that water is added with polybag or plastic paper covering, purpose
It is, is well mixed moisture.
In described step 5, described screening is specially roll screen, and it is specially by high vanadium Gao Ge made from disc balling machine
Type vanadium titano-magnetite green-ball by sieving roller between gap sieved, granularity be 8~16mm high vanadium chromium type high v-ti magnetite
Ore deposit green-ball enters next step, and high vanadium high-chromic vanadium-titanium ferroferrite green-ball of the granularity less than 8mm is back to the disk pelletizing of step 5
Machine continues pelletizing, and granularity is more than 16mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball by crushing, and the disk for being back to step 5 is made
Ball machine continues pelletizing.
The yield of described high vanadium high-chromic vanadium-titanium ferroferrite pelletizing reaches 1500 ton days.
Described high vanadium high-chromic vanadium-titanium ferroferrite pelletizing is used for the high vanadium high-chromic vanadium-titanium ferroferrite of blast furnace process import
Furnace charge.
A kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of the present invention, compared to prior art, its advantage is：
1. a kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of the present invention, by moistening the mill high vanadium chromium type high v-ti magnetite of import
Ore deposit, the common Iron Ore Powder of mixing and common superfine iron powder, appropriate adjustment bentonite ore ratio, solve the high vanadium Gao Ge of import well
Type vanadium titano-magnetite granularity is excessively thick, and balling-up is poor, consumption of bentonite amount is big when preparing high vanadium high-chromic vanadium-titanium ferroferrite pelletizing
Inferior position；Compound grade is caused averagely to improve more than 8% by moistening mill, bentonite ore ratio reduces by more than 1%, and pellet grade is obtained
To largely improving；Efficiently and effectively improve quality of green pellets, it is ensured that pellet Yield and quality；
2. by setting rational sintering temperature, V containing vanadium is reached in the case of realizing pellet stable components2O5：0.45
~0.62%, TiO2：2.29~3.20%, Cr2O3：0.22~0.48%, meet the high vanadium high-chromic vanadium titanium of blast furnace process import
The requirement of magnetic iron ore.
During 3. high vanadium high-chromic vanadium-titanium ferroferrite pelletizing is prepared in the present invention, plus the benefit of bottom water and stewing material is favourable
In the preparation of pelletizing and uniform, and then the yield and quality of pelletizing are improved, and very big side is brought for follow-up shaft roasting
Just, furthermore be conducive to processability more excellent pelletizing.
4. it is more close by moistening mineral powder granular bonding state in the change of mill and raw material proportioning etc., pelletizing in the present invention,
Microstructure is more uniformly distributed densification, so that high vanadium high-chromic vanadium-titanium ferroferrite pellet characteristics are significantly improved,
Including higher shatter strength of green pellet, higher compression strength of green pel let, higher acid pellet compression strength, and acid pellet
The metallurgical performances such as reduction swellability, reproducibility and soft melting dropping characteristic are more excellent.
Embodiment
With reference to embodiment, the present invention is described in further detail.
High vanadium high-chromic vanadium-titanium ferroferrite used in following examples comes from Russian Ural area.
High vanadium high-chromic vanadium-titanium ferroferrite used in following examples, its TFe included is 61~63wt.%, comprising
Chemical composition and its mass percent are：FeO：26~28%, Fe3O4：54.06~58.97%, V2O5：0.9~1.1%,
TiO2：4.5~5.5%, Cr2O3：0.45~0.85%, CaO：0.16~0.26%, SiO2：2~3%, MgO：0.5~
1.0%, Al2O3：2.5~4.0%, surplus is inevitable impurity；
Common Iron Ore Powder used in following examples, its TFe included be 63~65wt.%, comprising chemical composition and
Its mass percent is：FeO：22~28%, Fe3O4：56.82~66.03%, CaO：0.06~1.0%, SiO2：5~6%,
MgO：0.14~0.74%, Al2O3：1~4%, surplus is inevitable impurity.
Common superfine iron powder used in following examples, its TFe included be 65~69wt.%, comprising chemical composition
And its mass percent is：FeO：23~27%, Fe3O4：60.66~70.48%, CaO：0.1~0.2%, SiO2：4~8%,
MgO：0.15~0.35%, Al2O3：0.05~0.35%, surplus is inevitable impurity.
Bentonite used in following examples is commercial products, and its composition contained and its mass percent are：SiO2：66
~69%, Al2O3：13~16%, MgO：4~5%, CaO：2~3%, Na2O≤1.7%, K2O≤1.2%, surplus is can not
The impurity avoided.
Technical solution of the present invention is not limited to act embodiment set forth below, in addition between each embodiment
Any combination.
Embodiment 1
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, is realized by following steps：Moisten mill, dispensing, baking
Dry-mixing plus bottom water batch mixing, stewing material, pelletizing, green-ball screening, drying pre-oxidation, shaft roasting, cooling, are concretely comprised the following steps：
Step 1, profit mill
High vanadium high-chromic vanadium-titanium ferroferrite is subjected to profit mill, profit time consuming is 15min, and the high vanadium chromium type high after profit mill is made
V-ti magnetite miberal powder, its fineness is -200 mesh >=90%；
Described profit mill uses damp mill, wherein, the technological parameter of damp mill is：The specification of damp mill is MR3254, outside
Shape size is 13.4m × 7.25m × 5.7m, and cylinder internal diameter is 3.2m, cylinder active length 5.4m, cylinder available capacity
39.5m3, cylinder number of moving part is 16.5r/min, and the maximum loading of damp mill is material 6t, steel ball 44t；
Step 2, dispensing
According to the raw material composition and its ratio of weight and number of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, raw material is weighed, mixing is equal
It is even, obtain mixed material；
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing is by high vanadium high-chromic vanadium-titanium ferroferrite powder, iron charge and the bentonite after profit mill
It is prepared from, wherein, the ratio of weight and number of each composition is：
High vanadium high-chromic vanadium-titanium ferroferrite powder after profit mill：51 parts, iron charge：49 parts, bentonite：0.8 part；
High vanadium high-chromic vanadium-titanium ferroferrite powder after described profit mill is that the high vanadium high-chromic vanadium-titanium ferroferrite of import is moistened
Grind the high vanadium high-chromic vanadium-titanium ferroferrite powder that obtained fineness is -200 mesh >=90%；
The composition and its parts by weight that described iron charge contains be：Common Iron Ore Powder：70 parts；Common superfine iron powder：30 parts；
Wherein, particle diameter≤0.5mm of common Iron Ore Powder accounts for 90%, and its maximum particle diameter≤3mm；
The fineness of common superfine iron powder is -325 mesh >=85% or -200 mesh >=95%；
The mesh of described bentonitic granularity≤200；
Step 3, dry
Mixed material is placed in drying box, dried at 90 DEG C, until mixed material moisture content is 6%, is dried
Mixed material after dry；
Plus bottom water batch mixing, stewing material step 4,
Mixed material after drying is added into water by the way of atomization adds water, and is well mixed, is then covered with polybag
Lid adds the mixed material of water, boils in a covered pot over a slow fire material 30min, obtains the material boiled in a covered pot over a slow fire；Wherein, it is the mixed material matter after drying to add the amount of water
The 2% of amount；
Step 5, pelletizing and screening
The material boiled in a covered pot over a slow fire is placed in disc balling machine, water is added so that high vanadium high-chromic vanadium-titanium ferroferrite green-ball moisture content
Control carries out pelletizing 11%, by screening, obtains the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 8~10mm；
Described screening is specially roll screen, and it is specially to give birth to high vanadium high-chromic vanadium-titanium ferroferrite made from disc balling machine
Ball by sieving roller between gap sieved, granularity for 8~10mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball enter it is next
Step, the disc balling machine that high vanadium high-chromic vanadium-titanium ferroferrite green-ball of the granularity less than 8mm is back to step 5 continues pelletizing, grain
High vanadium high-chromic vanadium-titanium ferroferrite green-ball of the degree more than 10mm is by being broken into miberal powder, and the disc balling machine for being back to step 5 is made
Ball.
Prepare high vanadium high-chromic vanadium-titanium ferroferrite pelletizing green-ball granularity be 8~10mm, shatter strength of green pellet be 6 times/
It is individual, compression strength 15N/.
Step 6, drying pre-oxidation
By the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 8~10mm, vertical furnace is uniformly distributed into by material distributing machine
In drying bed at top, the pre- thermal oxide of drying and dewatering is passed through in drying bed, the high vanadium high-chromic vanadium titanium of drying pre-oxidation is obtained
Magnetite Pellets, wherein, drying bed temperature control is 750 DEG C, petticoat pipe temperature control is 210 DEG C, thickness of feed layer control is
140mm, drying time are 9min；
The compression strength for drying the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of pre-oxidation is 400N/.
Step 7, shaft roasting
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing for drying pre-oxidation is placed in shaft furnace and is calcined, after being calcined
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing；Its roasting technique is：Chamber temperature is 1250 DEG C, chamber pressure is 7kPa, coal
Atmospheric pressure is that 20kPa, combustion-supporting wind pressure are 18kPa, and roasting time is 10min；
Step 8, cool down
By the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting, after furnace cooling, from the discharge of vertical furnace bottom, high vanadium is obtained
High-chromic vanadium-titanium ferroferrite pelletizing.
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing manufactured in the present embodiment, its TFe included is 64.22wt.%, comprising
Chemical composition and its mass percent are：Fe2O3：91.41%, FeO：0.3%, V2O5：0.45%, TiO2：2.29%, Cr2O3：
0.22%, CaO：0.11%, SiO2：3.18%, MgO：0.32%, Al2O3：1.62%, surplus is inevitable impurity.
The compression strength of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting is 2500N/, and reduction swellability rate is
11.9%.
Embodiment 2
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, is realized by following steps：Moisten mill, dispensing, baking
Dry-mixing plus bottom water batch mixing, stewing material, pelletizing, green-ball screening, drying pre-oxidation, shaft roasting, cooling, are concretely comprised the following steps：
Step 1, profit mill
High vanadium high-chromic vanadium-titanium ferroferrite is subjected to profit mill, profit time consuming is 8min, and the high vanadium chromium type high after profit mill is made
V-ti magnetite miberal powder, its fineness is -200 mesh >=90%；
Described profit mill uses damp mill, wherein, the technological parameter of damp mill is：The specification of damp mill is MR3870, outside
Shape size is 16.4m × 8.74m × 7.59m, and cylinder internal diameter is 3.8m, cylinder active length 7.0m, cylinder available capacity
73.6m3, cylinder number of moving part is 14.3r/min, and the maximum loading of damp mill is material 11.3t, steel ball 83t；
Step 2, dispensing
According to the raw material composition and its ratio of weight and number of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, raw material is weighed, mixing is equal
It is even, obtain mixed material；
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing is by high vanadium high-chromic vanadium-titanium ferroferrite powder, iron charge and the bentonite after profit mill
It is prepared from, wherein, the ratio of weight and number of each composition is：
High vanadium high-chromic vanadium-titanium ferroferrite powder after profit mill：54 parts, iron charge：46 parts, bentonite：1.0 part；
High vanadium high-chromic vanadium-titanium ferroferrite powder after described profit mill is that the high vanadium high-chromic vanadium-titanium ferroferrite of import is moistened
Grind the high vanadium high-chromic vanadium-titanium ferroferrite powder that obtained fineness is -200 mesh >=90%；
The composition and its parts by weight that described iron charge contains be：Common Iron Ore Powder：100 parts；Wherein, common Iron Ore Powder
Particle diameter≤0.5mm's accounts for 90%, and its maximum particle diameter≤3mm；
The mesh of described bentonitic granularity≤200；
Step 3, dry
Mixed material is placed in drying box, dried at 110 DEG C, until mixed material moisture content is 6%, is dried
Mixed material after dry；
Plus bottom water batch mixing, stewing material step 4,
Mixed material after drying is added into water by the way of atomization adds water, and is well mixed, is then covered with polybag
Lid adds the mixed material of water, boils in a covered pot over a slow fire material 30min, obtains the material boiled in a covered pot over a slow fire；Wherein, it is the mixed material matter after drying to add the amount of water
The 2% of amount；
Step 5, pelletizing and screening
The material boiled in a covered pot over a slow fire is placed in disc balling machine, water is added so that high vanadium high-chromic vanadium-titanium ferroferrite green-ball moisture content
Control carries out pelletizing 9%, by screening, obtains the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 9~15mm；
Described screening is specially roll screen, and it is specially to give birth to high vanadium high-chromic vanadium-titanium ferroferrite made from disc balling machine
Ball by sieving roller between gap sieved, granularity for 9~15mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball enter it is next
Step, the disc balling machine that high vanadium high-chromic vanadium-titanium ferroferrite green-ball of the granularity less than 9mm is back to step 5 continues pelletizing, grain
High vanadium high-chromic vanadium-titanium ferroferrite green-ball of the degree more than 15mm is by being broken into miberal powder, and the disc balling machine for being back to step 5 is made
Ball.
Prepare high vanadium high-chromic vanadium-titanium ferroferrite pelletizing green-ball granularity be 9~15mm, shatter strength of green pellet be 4 times/
It is individual, compression strength 11.6N/.
Step 6, drying pre-oxidation
By the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 9~15mm, vertical furnace is uniformly distributed into by material distributing machine
In drying bed at top, the pre- thermal oxide of drying and dewatering is passed through in drying bed, the high vanadium high-chromic vanadium titanium of drying pre-oxidation is obtained
Magnetite Pellets, wherein, drying bed temperature control is 650 DEG C, petticoat pipe temperature control is 160 DEG C, thickness of feed layer control is
100mm, drying time are 5min；
The compression strength for drying the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of pre-oxidation is 330N/.
Step 7, shaft roasting
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing for drying pre-oxidation is placed in shaft furnace and is calcined, after being calcined
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing；Its roasting technique is：Chamber temperature is 1150 DEG C, chamber pressure is 7kPa, coal
Atmospheric pressure is that 18kPa, combustion-supporting wind pressure are 16kPa, and roasting time is 18min；
Step 8, cool down
By the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting, after furnace cooling, from the discharge of vertical furnace bottom, high vanadium is obtained
High-chromic vanadium-titanium ferroferrite pelletizing.
Obtained high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, its TFe included be 62.42wt.%, comprising chemical composition
And its mass percent is：Fe2O3：88.84%, FeO：0.30%, V2O5：0.47%, TiO2：3.10%, Cr2O3：0.35%,
CaO：0.11%, SiO2：4.77%, MgO：0.32%, Al2O3：1.62%, surplus is inevitable impurity.
The compression strength of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting is 2260N/, and reduction swellability rate is
13.8%.
Present embodiment uses disk blanking machine blanking, it is ensured that each disk blanking accuracy, adheres to running disk system, it is ensured that iron
Expect every 15 minutes running disks detection once, fluctuation range is within ± 0.5kg/m；The detection of bentonite every 25 minutes running disks once, often
Secondary running disk five times, averages, fluctuation range is within ± 0.02kg/m.
Embodiment 3
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, is realized by following steps：Moisten mill, dispensing, baking
Dry-mixing plus bottom water batch mixing, stewing material, pelletizing, green-ball screening, drying pre-oxidation, shaft roasting, cooling, are concretely comprised the following steps：
Step 1, profit mill
High vanadium high-chromic vanadium-titanium ferroferrite is subjected to profit mill, profit time consuming is 10min, and the high vanadium chromium type high after profit mill is made
V-ti magnetite miberal powder, its fineness is -200 mesh >=90%；
Described profit mill uses damp mill, wherein, the technological parameter of damp mill is：The specification of damp mill is MR2265, outside
Shape size is 10.97m × 5.62m × 4.05m, and cylinder internal diameter is 2.2m, cylinder active length 6.5m, cylinder available capacity
21.4m3, cylinder number of moving part is 21.95r/min, and the maximum loading of damp mill is material 3.4t, steel ball 24t；
Step 2, dispensing
According to the raw material composition and its ratio of weight and number of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, raw material is weighed, mixing is equal
It is even, obtain mixed material；
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing is by high vanadium high-chromic vanadium-titanium ferroferrite powder, iron charge and the bentonite after profit mill
It is prepared from, wherein, the ratio of weight and number of each composition is：
High vanadium high-chromic vanadium-titanium ferroferrite powder after profit mill：52 parts, iron charge：48 parts, bentonite：0.9 part；
High vanadium high-chromic vanadium-titanium ferroferrite powder after described profit mill is that the high vanadium high-chromic vanadium-titanium ferroferrite of import is moistened
Grind the high vanadium high-chromic vanadium-titanium ferroferrite powder that obtained fineness is -200 mesh >=90%；
The composition and its parts by weight that described iron charge contains be：Common Iron Ore Powder：70 parts, common superfine iron powder：30 parts；
Wherein, particle diameter≤0.5mm of common Iron Ore Powder accounts for 90%, and its maximum particle diameter≤3mm；The fineness of common superfine iron powder for-
200 mesh >=95%；
The mesh of described bentonitic granularity≤200；
Step 3, dry
Mixed material is placed in drying box, dried at 110 DEG C, until mixed material moisture content is 7%, is dried
Mixed material after dry；
Plus bottom water batch mixing, stewing material step 4,
Mixed material after drying is added into water by the way of atomization adds water, and is well mixed, is then covered with polybag
Lid adds the mixed material of water, boils in a covered pot over a slow fire material 40min, obtains the material boiled in a covered pot over a slow fire；Wherein, it is the mixed material matter after drying to add the amount of water
The 2.2% of amount；
Step 5, pelletizing and screening
The material boiled in a covered pot over a slow fire is placed in disc balling machine, water is added so that high vanadium high-chromic vanadium-titanium ferroferrite green-ball moisture content
Control carries out pelletizing 10%, by screening, obtains the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 9~16mm；
Described screening is specially roll screen, and it is specially to give birth to high vanadium high-chromic vanadium-titanium ferroferrite made from disc balling machine
Ball by sieving roller between gap sieved, granularity for 9~16mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball enter it is next
Step, the disc balling machine that high vanadium high-chromic vanadium-titanium ferroferrite green-ball of the granularity less than 9mm is back to step 5 continues pelletizing, grain
High vanadium high-chromic vanadium-titanium ferroferrite green-ball of the degree more than 16mm is by being broken into miberal powder, and the disc balling machine for being back to step 5 is made
Ball.
Prepare high vanadium high-chromic vanadium-titanium ferroferrite pelletizing green-ball granularity be 9~16mm, shatter strength of green pellet be 5 times/
It is individual, compression strength 12N/.
Step 6, drying pre-oxidation
By granularity being uniformly distributed into by material distributing machine in the drying bed at shaft furnace furnace roof for 9~16mm, in drying bed
By the pre- thermal oxide of drying and dewatering, the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of drying pre-oxidation is obtained, wherein, dry bed tempertaure
Control is 750 DEG C, petticoat pipe temperature control is 210 DEG C, thickness of feed layer control is that 140mm, drying time are 9min；
The compression strength for drying the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of pre-oxidation is 360N/.
Step 7, shaft roasting
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing for drying pre-oxidation is placed in shaft furnace and is calcined, after being calcined
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing；Its roasting technique is：Chamber temperature is 1250 DEG C, chamber pressure is 11kPa, coal
Atmospheric pressure is that 20kPa, combustion-supporting wind pressure are 18kPa, and roasting time is 10min；
Step 8, cool down
By the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting, after furnace cooling, from the discharge of vertical furnace bottom, high vanadium is obtained
High-chromic vanadium-titanium ferroferrite pelletizing.
Prepare high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, its TFe included be 63.18wt.%, comprising chemical composition
And its mass percent is：Fe2O3：89.79%, FeO：0.47%, V2O5：0.48%, TiO2：2.56%, Cr2O3：0.29%,
CaO：0.22%, SiO2：3.32%, MgO：0.89%, Al2O3：1.96%, surplus is inevitable impurity.
The compression strength of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting is 2410N/, and reduction swellability rate is
12.8%.
Embodiment 4
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, is realized by following steps：Moisten mill, dispensing, baking
Dry-mixing plus bottom water batch mixing, stewing material, pelletizing, green-ball screening, drying pre-oxidation, shaft roasting, cooling, are concretely comprised the following steps：
Step 1, profit mill
High vanadium high-chromic vanadium-titanium ferroferrite is subjected to profit mill, profit time consuming is 5min, and the high vanadium chromium type high after profit mill is made
V-ti magnetite miberal powder, its fineness is -200 mesh >=90%；
Described profit mill uses damp mill, wherein, the technological parameter of damp mill is：The specification of damp mill is MR3254, outside
Shape size is 13.4m × 7.25m × 5.7m, and cylinder internal diameter is 3.2m, cylinder active length 5.4m, cylinder available capacity
39.5m3, cylinder number of moving part is 16.5r/min, and the maximum loading of damp mill is material 6t, steel ball 44t；
Step 2, dispensing
According to the raw material composition and its ratio of weight and number of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, raw material is weighed, mixing is equal
It is even, obtain mixed material；
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing is by high vanadium high-chromic vanadium-titanium ferroferrite powder, iron charge and the bentonite after profit mill
It is prepared from, wherein, the ratio of weight and number of each composition is：
High vanadium high-chromic vanadium-titanium ferroferrite powder after profit mill：56 parts, iron charge：44 parts, bentonite：1.1 part；
High vanadium high-chromic vanadium-titanium ferroferrite powder after described profit mill is that the high vanadium high-chromic vanadium-titanium ferroferrite of import is moistened
Grind the high vanadium high-chromic vanadium-titanium ferroferrite powder that obtained fineness is -200 mesh >=90%；
The composition and its parts by weight that described iron charge contains be：Common Iron Ore Powder：85 parts, common superfine iron powder：15 parts；
Wherein, particle diameter≤0.5mm of common Iron Ore Powder accounts for 90%, and its maximum particle diameter≤3mm；The fineness of common superfine iron powder for-
200 mesh >=95%；
The mesh of described bentonitic granularity≤200；
Step 3, dry
Mixed material is placed in drying box, dried at 110 DEG C, until mixed material moisture content is 8%, is dried
Mixed material after dry；
Plus bottom water batch mixing, stewing material step 4,
Mixed material after drying is added into water by the way of atomization adds water, and is well mixed, is then covered with polybag
Lid adds the mixed material of water, boils in a covered pot over a slow fire material 50min, obtains the material boiled in a covered pot over a slow fire；Wherein, it is the mixed material matter after drying to add the amount of water
The 1.8% of amount；
Step 5, pelletizing and screening
The material boiled in a covered pot over a slow fire is placed in disc balling machine, water is added so that high vanadium high-chromic vanadium-titanium ferroferrite green-ball moisture content
Control carries out pelletizing 11%, by screening, obtains the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 8~15mm；
Described screening is specially roll screen, and it is specially to give birth to high vanadium high-chromic vanadium-titanium ferroferrite made from disc balling machine
Ball by sieving roller between gap sieved, granularity for 8~15mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball enter it is next
Step, the disc balling machine that high vanadium high-chromic vanadium-titanium ferroferrite green-ball of the granularity less than 8mm is back to step 5 continues pelletizing, grain
High vanadium high-chromic vanadium-titanium ferroferrite green-ball of the degree more than 15mm is by being broken into miberal powder, and the disc balling machine for being back to step 5 is made
Ball.
Prepare high vanadium high-chromic vanadium-titanium ferroferrite pelletizing green-ball granularity be 8~15mm, shatter strength of green pellet be 4 times/
It is individual, compression strength 10N/.
Step 6, drying pre-oxidation
By granularity being uniformly distributed into by material distributing machine in the drying bed at shaft furnace furnace roof for 8~15mm, in drying bed
By the pre- thermal oxide of drying and dewatering, the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of drying pre-oxidation is obtained, wherein, dry bed tempertaure
Control is 700 DEG C, petticoat pipe temperature control is 190 DEG C, thickness of feed layer control is that 120mm, drying time are 7min；
The compression strength for drying the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of pre-oxidation is 300N/.
Step 7, shaft roasting
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing for drying pre-oxidation is placed in shaft furnace and is calcined, after being calcined
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing；Its roasting technique is：Chamber temperature is 1200 DEG C, chamber pressure is 9kPa, coal
Atmospheric pressure is that 19kPa, combustion-supporting wind pressure are 17kPa, and roasting time is 14min；
Step 8, cool down
By the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting, after furnace cooling, from the discharge of vertical furnace bottom, high vanadium is obtained
High-chromic vanadium-titanium ferroferrite pelletizing.
Prepare high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, its TFe included be 61.88wt.%, comprising chemical composition
And its mass percent is：Fe2O3：87.51%, FeO：0.8%, V2O5：0.62%, TiO2：3.20%, Cr2O3：0.48%,
TFe：61.88%, CaO：0.63%, SiO2：3.25%, MgO：0.34%, Al2O3：3.06%, surplus is inevitably miscellaneous
Matter.
The compression strength of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting is 2200N/, and reduction swellability rate is
16.4%.
Comparative example
A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, is realized by following steps：Dispensing, drying are mixed
Close plus bottom water batch mixing, stewing material, pelletizing, green-ball screening, drying pre-oxidation, shaft roasting, cooling, concretely comprise the following steps：
Step 1, dispensing
According to the raw material composition and its ratio of weight and number of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, raw material is weighed, mixing is equal
It is even, obtain mixed material；
Step 2, dry
Mixed material is placed in drying box, dried at 110 DEG C, until mixed material moisture content is 7%, is dried
Mixed material after dry；
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing is by untreated high vanadium high-chromic vanadium-titanium ferroferrite powder, iron charge and swollen
Profit soil is prepared from, wherein, the ratio of weight and number of each composition is：
Untreated high vanadium high-chromic vanadium-titanium ferroferrite powder：52 parts, iron charge：48 parts, bentonite：0.9 part；
The composition and its parts by weight that described iron charge contains be：Common Iron Ore Powder：70 parts, common superfine iron powder：30 parts；
Wherein, particle diameter≤0.5mm of common Iron Ore Powder accounts for 90%, and its maximum particle diameter≤3mm；The fineness of common superfine iron powder for-
200 mesh >=95%；
The mesh of described bentonitic granularity≤200；
Plus bottom water batch mixing, stewing material step 3,
Mixed material after drying is added into water by the way of atomization adds water, and is well mixed, is then covered with polybag
Lid adds the mixed material of water, boils in a covered pot over a slow fire material 40min, obtains the material boiled in a covered pot over a slow fire；Wherein, it is the mixed material matter after drying to add the amount of water
The 2.2% of amount；
Step 4, pelletizing and screening
The material boiled in a covered pot over a slow fire is placed in disc balling machine, water is added so that high vanadium high-chromic vanadium-titanium ferroferrite green-ball moisture content
Control carries out pelletizing 10%, by screening, obtains the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 9~16mm；
Described screening is specially roll screen, and it is specially to give birth to high vanadium high-chromic vanadium-titanium ferroferrite made from disc balling machine
Ball by sieving roller between gap sieved, granularity for 9~16mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball enter it is next
Step, the disc balling machine that high vanadium high-chromic vanadium-titanium ferroferrite green-ball of the granularity less than 9mm is back to step 5 continues pelletizing, grain
High vanadium high-chromic vanadium-titanium ferroferrite green-ball of the degree more than 16mm is by being broken into miberal powder, and the disc balling machine for being back to step 5 is made
Ball.
Prepare high vanadium high-chromic vanadium-titanium ferroferrite pelletizing green-ball granularity be 6~12mm, shatter strength of green pellet be 2 times/
It is individual, compression strength 7N/.
Step 5, drying pre-oxidation
By granularity being uniformly distributed into by material distributing machine in the drying bed at shaft furnace furnace roof for 9~16mm, in drying bed
By the pre- thermal oxide of drying and dewatering, the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of drying pre-oxidation is obtained, wherein, dry bed tempertaure
Control is 750 DEG C, petticoat pipe temperature control is 210 DEG C, thickness of feed layer control is that 140mm, drying time are 9min；
The compression strength for drying the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of pre-oxidation is 200N/.
Step 6, shaft roasting
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing for drying pre-oxidation is placed in shaft furnace and is calcined, after being calcined
High vanadium high-chromic vanadium-titanium ferroferrite pelletizing；Its roasting technique is：Chamber temperature is 1250 DEG C, chamber pressure is 11kPa, coal
Atmospheric pressure is that 20kPa, combustion-supporting wind pressure are 18kPa, and roasting time is 10min；
Step 7, cool down
By the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting, after furnace cooling, from the discharge of vertical furnace bottom, high vanadium is obtained
High-chromic vanadium-titanium ferroferrite pelletizing.
Obtained high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, its TFe included be 63.28wt.%, comprising chemical composition
And its mass percent is：Fe2O3：89.79%, FeO：0.47%, V2O5：0.48%, TiO2：2.86%, Cr2O3：0.27%,
CaO：0.22%, SiO2：3.26%, MgO：0.53%, Al2O3：1.92%, surplus is inevitable impurity.
The compression strength of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting is 1520N/, and reduction swellability rate is
25%.
Claims (7)
1. a kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, it is characterised in that the high vanadium chromium type high v-ti magnetite
The preparation method of ore deposit pelletizing, is realized by following steps：
Step 1, profit mill
High vanadium high-chromic vanadium-titanium ferroferrite is subjected to profit mill, profit time consuming is 5~15min, and the high vanadium chromium type high after profit mill is made
V-ti magnetite miberal powder, its fineness is -200 mesh >=90%；
Wherein, described profit mill uses damp mill, wherein, the technological parameter of damp mill is：Cylinder number of moving part be 14.3~
21.95r/min, the material ball ratio of damp mill is：(3.4~11.3)：(24~83)；
Step 2, dispensing
According to the raw material composition and its ratio of weight and number of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing, raw material is weighed, is well mixed, obtains
To mixed material；
Wherein, high vanadium high-chromic vanadium-titanium ferroferrite pelletizing is by high vanadium high-chromic vanadium-titanium ferroferrite powder, iron charge and the swelling after profit mill
Soil is prepared from, wherein, the ratio of weight and number of each composition is：
High vanadium high-chromic vanadium-titanium ferroferrite powder after profit mill：51~56 parts, iron charge：44~49 parts, bentonite：0.8~1.1 part；
High vanadium high-chromic vanadium-titanium ferroferrite powder after described profit mill is that the high vanadium high-chromic vanadium-titanium ferroferrite progress profit of import is ground
The fineness arrived is the high vanadium high-chromic vanadium-titanium ferroferrite powder of -200 mesh >=90%, and its TFe included is 61~63wt.%, comprising
Chemical composition and its mass percent be：FeO：26~28%, Fe3O4：54.06~58.97%, V2O5：0.9~1.1%,
TiO2：4.5~5.5%, Cr2O3：0.45~0.85%, CaO：0.16~0.26%, SiO2：2~3%, MgO：0.5~
1.0%, Al2O3：2.5~4.0%, surplus is inevitable impurity；
The composition and its parts by weight that described iron charge contains be：Common Iron Ore Powder：70~100 parts；Common superfine iron powder：0~
30 parts；
Wherein, particle diameter≤0.5mm of common Iron Ore Powder accounts for 90%, and its maximum particle diameter≤3mm；
The fineness of common superfine iron powder is -325 mesh >=85% or -200 mesh >=95%；
The mesh of described bentonitic granularity≤200, its composition contained and its mass percent are：SiO2：66~69%,
Al2O3：13~16%, MgO：4~5%, CaO：2~3%, Na2O≤1.7%, K2O≤1.2%, surplus is inevitably miscellaneous
Matter；
Step 3, dry
It is 6~8%, the mixed material after being dried that mixed material, which is dried to mixed material moisture content,；
Plus bottom water batch mixing, stewing material step 4,
Mixed material after drying is added into water, and is well mixed, 30~50min of material is then boiled in a covered pot over a slow fire, obtains the material boiled in a covered pot over a slow fire；Wherein,
It is 1.8~2.2% of the mixed material quality after drying to add the amount of water；
Step 5, pelletizing and screening
The material boiled in a covered pot over a slow fire is placed in disc balling machine, water is added so that high vanadium high-chromic vanadium-titanium ferroferrite green-ball moisture control
9~11%, pelletizing is carried out, by screening, the high vanadium high-chromic vanadium-titanium ferroferrite green-ball that granularity is 8~16mm is obtained；
Step 6, drying pre-oxidation
Granularity is uniformly distributed at shaft furnace furnace roof for 8~16mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball by material distributing machine
In drying bed, the pre- thermal oxide of drying and dewatering is passed through in drying bed, the high vanadium high-chromic vanadium-titanium ferroferrite of drying pre-oxidation is obtained
Pelletizing, wherein, drying bed temperature control is 650~750 DEG C, petticoat pipe temperature control is 160~210 DEG C, thickness of feed layer control is
100~140mm, drying time are 5~9min；
Step 7, shaft roasting
The high vanadium high-chromic vanadium-titanium ferroferrite pelletizing for drying pre-oxidation is placed in shaft furnace and is calcined, the high vanadium after being calcined
High-chromic vanadium-titanium ferroferrite pelletizing；Its roasting technique is：Chamber temperature is 1150~1250 DEG C, chamber pressure be 7~
11kPa, gas pressure are that 18~20kPa, combustion-supporting wind pressure are 16~18kPa, and roasting time is 10~18min；
Step 8, cool down
By the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing after roasting, after furnace cooling, from the discharge of vertical furnace bottom, high vanadium Gao Ge is obtained
Type V-ti Bearing Magnetite Pellets.
2. the preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing as claimed in claim 1, it is characterised in that the height of preparation
Vanadium high-chromic vanadium-titanium ferroferrite pelletizing, its TFe included be 61.88~64.22wt.%, comprising chemical composition and its quality
Percentage is：Fe2O3：87.51~91.41%, FeO：0.3~0.8%, V2O5：0.45~0.62%, TiO2：2.29~
3.20%, Cr2O3：0.22~0.48%, CaO：0.11~0.63%, SiO2：3.18~4.77%, MgO：0.32~0.89%,
Al2O3：1.62~4.0%, surplus is inevitable impurity.
3. the preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing as claimed in claim 1, it is characterised in that the height of preparation
The green-ball granularity of vanadium high-chromic vanadium-titanium ferroferrite pelletizing be 8~16mm, shatter strength of green pellet be >=4 times/, compression strength >=
10N/, the compression strength for drying the high vanadium high-chromic vanadium-titanium ferroferrite pelletizing of pre-oxidation is >=300N/, the high vanadium after roasting
The compression strength of high-chromic vanadium-titanium ferroferrite pelletizing is >=2200N/, reduction swellability rate≤16.4% of pelletizing.
4. the preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing as claimed in claim 1, it is characterised in that described step
In rapid 3, described drying is：Mixed material is placed in drying box, dried at 90~110 DEG C, until mixed material contains
Water rate is 6~8%.
5. the preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing as claimed in claim 1, it is characterised in that described step
In rapid 4, the mode of described addition water is added water using atomization.
6. the preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing as claimed in claim 1, it is characterised in that described step
In rapid 4, described stewing material refers to the mixed material that water is added with polybag or plastic paper covering.
7. the preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing as claimed in claim 1, it is characterised in that described step
In rapid 5, described screening is specially roll screen, and it is specially by high vanadium high-chromic vanadium-titanium ferroferrite green-ball made from disc balling machine
Sieved by sieving the gap between roller, granularity enters next step for 8~16mm high vanadium high-chromic vanadium-titanium ferroferrite green-ball
Suddenly, high vanadium high-chromic vanadium-titanium ferroferrite green-ball of the granularity less than 8mm is back to the disc balling machine continuation pelletizing of step 5, granularity
High vanadium high-chromic vanadium-titanium ferroferrite green-ball more than 16mm is back to the disc balling machine continuation pelletizing of step 5 by broken.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710447611.4A CN107287412B (en) | 2017-06-14 | 2017-06-14 | A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| PCT/CN2018/088042 WO2018228155A1 (en) | 2017-06-14 | 2018-05-23 | Preparation method for high-vanadium high-chromium type vanadium titanium magnetite pellets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710447611.4A CN107287412B (en) | 2017-06-14 | 2017-06-14 | A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107287412A true CN107287412A (en) | 2017-10-24 |
| CN107287412B CN107287412B (en) | 2018-10-23 |
Family
ID=60097800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710447611.4A Active CN107287412B (en) | 2017-06-14 | 2017-06-14 | A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107287412B (en) |
| WO (1) | WO2018228155A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107881327A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that high-chromic vanadium-titanium ferroferrite prepares sintering deposit with addition of common iron ore |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| WO2018228155A1 (en) * | 2017-06-14 | 2018-12-20 | 东北大学 | Preparation method for high-vanadium high-chromium type vanadium titanium magnetite pellets |
| WO2018228156A1 (en) * | 2017-06-14 | 2018-12-20 | 东北大学 | High-vanadium and high-chromium type vanadium-titanium magnetite pellet |
| CN111961842A (en) * | 2020-09-02 | 2020-11-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Taihe vanadium-titanium pellet and production method thereof |
| CN112899471A (en) * | 2021-01-19 | 2021-06-04 | 东北大学 | Method for preparing large-size composite vanadium-titanium pellet ore |
| CN114574693A (en) * | 2022-01-19 | 2022-06-03 | 中南大学 | Sintering process of all-vanadium titano-magnetite pellets |
| CN114774682A (en) * | 2022-05-09 | 2022-07-22 | 北京首钢自动化信息技术有限公司 | Pellet pelletizing equipment, pellet pelletizing control method and device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807598A (en) * | 2022-04-12 | 2022-07-29 | 黑龙江建龙钢铁有限公司 | Method for preparing vanadium-titanium pellets by using sea sand coarse powder |
| CN117431397B (en) * | 2023-12-20 | 2024-03-15 | 东北大学 | Reduction method of vanadium titanium ore |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417977A (en) * | 2011-12-08 | 2012-04-18 | 黑龙江建龙钢铁有限公司 | High chromium-high vanadium type vanadium titanium ore pellet |
| CN102517442A (en) * | 2011-12-08 | 2012-06-27 | 黑龙江建龙钢铁有限公司 | Preparation method of high-chromium high-vanadium type vanadium-titanium ore pellets |
| CN104630449A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture |
| CN104630458A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Preparation method of acidic chromium-containing vanadium-titanium sintered ore |
| CN104862472A (en) * | 2015-05-12 | 2015-08-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-titanium pellet and preparing method thereof |
| CN105907956A (en) * | 2016-06-27 | 2016-08-31 | 东北大学 | Low-grade chromium-containing vanadium titanium magnetite oxidized pellet and preparation method thereof |
| CN106148731A (en) * | 2016-08-10 | 2016-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of ilmenite concentrate acid pellet |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4589875B2 (en) * | 2006-01-27 | 2010-12-01 | 新日本製鐵株式会社 | Reduction method of metal oxide in rotary hearth type reduction furnace |
| JP5042586B2 (en) * | 2006-10-16 | 2012-10-03 | 新日本製鐵株式会社 | Powder granulation method using desulfurized slag |
| CN107267748B (en) * | 2017-06-14 | 2018-08-28 | 东北大学 | A kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing |
| 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 |
-
2017
- 2017-06-14 CN CN201710447611.4A patent/CN107287412B/en active Active
-
2018
- 2018-05-23 WO PCT/CN2018/088042 patent/WO2018228155A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417977A (en) * | 2011-12-08 | 2012-04-18 | 黑龙江建龙钢铁有限公司 | High chromium-high vanadium type vanadium titanium ore pellet |
| CN102517442A (en) * | 2011-12-08 | 2012-06-27 | 黑龙江建龙钢铁有限公司 | Preparation method of high-chromium high-vanadium type vanadium-titanium ore pellets |
| CN104630449A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture |
| CN104630458A (en) * | 2015-02-09 | 2015-05-20 | 东北大学 | Preparation method of acidic chromium-containing vanadium-titanium sintered ore |
| CN104862472A (en) * | 2015-05-12 | 2015-08-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-titanium pellet and preparing method thereof |
| CN105907956A (en) * | 2016-06-27 | 2016-08-31 | 东北大学 | Low-grade chromium-containing vanadium titanium magnetite oxidized pellet and preparation method thereof |
| CN106148731A (en) * | 2016-08-10 | 2016-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of ilmenite concentrate acid pellet |
Non-Patent Citations (2)
| Title |
|---|
| 周密等: "强化制粒对含铬型钒钛混合料烧结的影响", 《钢铁》 * |
| 唐珏等: "以高铬型钒钛磁铁矿制备氧化球团", 《东北大学学报(自然科学版)》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018228155A1 (en) * | 2017-06-14 | 2018-12-20 | 东北大学 | Preparation method for high-vanadium high-chromium type vanadium titanium magnetite pellets |
| WO2018228156A1 (en) * | 2017-06-14 | 2018-12-20 | 东北大学 | High-vanadium and high-chromium type vanadium-titanium magnetite pellet |
| CN107881327A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that high-chromic vanadium-titanium ferroferrite prepares sintering deposit with addition of common iron ore |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| CN111961842A (en) * | 2020-09-02 | 2020-11-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Taihe vanadium-titanium pellet and production method thereof |
| CN112899471A (en) * | 2021-01-19 | 2021-06-04 | 东北大学 | Method for preparing large-size composite vanadium-titanium pellet ore |
| CN114574693A (en) * | 2022-01-19 | 2022-06-03 | 中南大学 | Sintering process of all-vanadium titano-magnetite pellets |
| CN114774682A (en) * | 2022-05-09 | 2022-07-22 | 北京首钢自动化信息技术有限公司 | Pellet pelletizing equipment, pellet pelletizing control method and device |
| CN114774682B (en) * | 2022-05-09 | 2024-03-15 | 北京首钢自动化信息技术有限公司 | Pellet pelletizing equipment, pellet pelletizing control method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107287412B (en) | 2018-10-23 |
| WO2018228155A1 (en) | 2018-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107287412B (en) | A kind of preparation method of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing | |
| CN107267748B (en) | A kind of high vanadium high-chromic vanadium-titanium ferroferrite pelletizing | |
| CN104630449B (en) | Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture | |
| CN105907956B (en) | A kind of low-grade acid pellet containing chromic vanadium-titanium ferroferrite and preparation method thereof | |
| CN102242259B (en) | Preparation process of low-grade laterite nickel ore oxidized pellet | |
| CN101597662B (en) | Method for producing direct reduced iron | |
| CN105132673B (en) | A kind of method for reducing carbon containing dust pellet material composite agglomeration solid fuel consumption | |
| CN106591572A (en) | Method for reinforcing preparation and reduction of carbon-containing pellets in iron ore | |
| CN103627895B (en) | Production method for sintering chromium powder ore by continuous strand sinter machine | |
| CN110788113B (en) | Method for inhibiting zinc-containing dust pellets from reduction degradation in rotary hearth furnace | |
| CN108998659B (en) | Process for processing pellet ore by using siderite powder and vanadium-titanium magnetite powder | |
| CN205368456U (en) | Apparatus for producing of COREX coating pelletizing | |
| CN110527826B (en) | Sintering method for inhibiting perovskite generation in sintering process | |
| CN104745798A (en) | Sintering process for ferrochromium fine powder ore pellets | |
| CN109852790B (en) | Method for preparing chromium-containing full vanadium-titanium self-fluxing pellet with medium and low alkalinity | |
| CN111996367A (en) | Method for utilizing superfine coal powder in sintering and sintering mixture | |
| CN114574693B (en) | Sintering process of all-vanadium titano-magnetite pellets | |
| CN110129499A (en) | A kind of method of blast furnace addition steel scrap production molten iron | |
| CN104745797A (en) | Material distributing method for sintering of chromite fine powder pellets | |
| CN111074066B (en) | High-magnesium pellet ore and production method thereof | |
| CN107326198A (en) | A kind of processing method and system of high phosphorus low-grade manganese carbonate ore | |
| CN109576490B (en) | Method for preparing high-alkalinity chromium-containing all-vanadium-titanium pellet ore by adding calcium carbonate | |
| CN106222350B (en) | A kind of coating material and preparation method thereof for inhibiting iron ore pellets melting and reducing excessively to cohere | |
| CN108004396B (en) | It is a kind of to produce acidic oxidation pellet method using nickel slag | |
| CN107326174B (en) | A kind of method of large-type sinterer sintering high-chromic vanadium-titanium ferroferrite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |