CN106755955A - The pyrolytic semlting method of vanadium titano-magnetite - Google Patents
The pyrolytic semlting method of vanadium titano-magnetite Download PDFInfo
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- CN106755955A CN106755955A CN201611040736.7A CN201611040736A CN106755955A CN 106755955 A CN106755955 A CN 106755955A CN 201611040736 A CN201611040736 A CN 201611040736A CN 106755955 A CN106755955 A CN 106755955A
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- magnetite
- vanadium titano
- pyrolytic semlting
- agstone
- coke
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
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Abstract
The present invention relates to a kind of smelting process of iron ore, and in particular to a kind of pyrolytic semlting method of vanadium titano-magnetite.The pyrolytic semlting method of vanadium titano-magnetite includes：A, lime stone and coke are taken, crushed, obtain agstone and coke blacking；B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Coke blacking=200~400:1.5~4:0.5~1, mixing, briquet；C, the briquetting for obtaining b step are calcined under inert gas shielding；D, step c is calcined after material cool to the furnace and take out after room temperature, crush, magnetic separation obtains v-ti magnetite miberal powder.The pyrolytic semlting method of vanadium titano-magnetite of the present invention, is reduced by high-temperature calcination, reduces the impurity in vanadium titano-magnetite, improves the content of iron in vanadium titano-magnetite and the grade of iron.
Description
Technical field
The present invention relates to a kind of smelting process of iron ore, and in particular to a kind of pyrolytic semlting method of vanadium titano-magnetite.
Background technology
Vanadium titano-magnetite is a kind of coarse size, Iron grade 53%, containing titanium dioxide 12%, vanadic anhydride 0.6% or so
Complicated difficult choosing it is difficult smelt magnetic iron ore, its balling-up sex index belongs to without balling-up or weak balling-up, China's vanadium titanium in 0.2-0.3
Magnet widely distributed, the rich reserves of bed, reserves and yield occupy the 3rd of national iron ore, 98.3 hundred million tons of proved reserves, far
Scape reserves are up to more than 30,000,000,000 tons.
Current v-ti magnetite concentrate is smelted by single magnetic selection method, and the grade of the iron ore concentrate obtained after magnetic separation always exists
60%~61%, 65% or so, so that the price of iron ore concentrate is not high, economic benefit is bad for the rate of recovery.Accordingly, it would be desirable to iron
The preparation technology of concentrate is improved, and to improve the grade and the rate of recovery of iron ore concentrate, is increased economic efficiency.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of pyrolytic semlting method of vanadium titano-magnetite.
The pyrolytic semlting method of vanadium titano-magnetite of the present invention, comprises the following steps：
A, lime stone and coke are taken, crushed, obtain agstone and coke blacking；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Coke blacking=200~400:1.5~4:0.5
~1, mixing, briquet；
C, the briquetting for obtaining b step are calcined under inert gas shielding, and calcining heat is 1700~1800 DEG C, is forged
The burning time is 40~60min；
D, step c is calcined after material cool to the furnace and take out after room temperature, crush, magnetic separation obtains v-ti magnetite miberal powder.
Granularity≤the 0.07mm of agstone, coke blacking in the pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein a steps
Granularity≤0.07mm.
Further, the pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein iron ore concentrate in b step:Agstone:Coke
The weight ratio of powder is 300:3:0.8.
The pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein inert gas described in step c are argon gas.
Further, the pyrolytic semlting method of above-mentioned vanadium titano-magnetite, calcining heat is 1750 DEG C wherein in step c, is forged
The burning time is 50min.
The pyrolytic semlting method of above-mentioned vanadium titano-magnetite, magnetic separation strength is 2500~3000Gs wherein in Step d.
The pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein in Step d the particle diameter of v-ti magnetite miberal powder be 0.01~
0.05mm。
The pyrolytic semlting method of vanadium titano-magnetite of the present invention, is reduced by high-temperature calcination, in reducing vanadium titano-magnetite
Impurity, improves the content of iron in vanadium titano-magnetite and the grade of iron, the grade ＞ of full iron product in final sefstromite concentrate powder
70%, the rate of recovery ＞ 60% of iron.
Specific embodiment
The pyrolytic semlting method of vanadium titano-magnetite of the present invention, comprises the following steps：
A, lime stone and coke are taken, crushed, obtain agstone and coke blacking；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Coke blacking=200~400:1.5~4:0.5
~1, mixing, briquet；
C, the briquetting for obtaining b step are calcined under inert gas shielding, and calcining heat is 1700~1800 DEG C, is forged
The burning time is 40~60min；
D, step c is calcined after material cool to the furnace and take out after room temperature, crush, magnetic separation obtains v-ti magnetite miberal powder.
Granularity≤the 0.07mm of agstone, coke blacking in the pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein a steps
Granularity≤0.07mm.
Further, the pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein iron ore concentrate in b step:Agstone:Coke
The weight ratio of powder is 300:3:0.8.
The pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein inert gas described in step c are argon gas.
Further, the pyrolytic semlting method of above-mentioned vanadium titano-magnetite, calcining heat is 1750 DEG C wherein in step c, is forged
The burning time is 50min.
The pyrolytic semlting method of above-mentioned vanadium titano-magnetite, magnetic separation strength is 2500~3000Gs wherein in Step d.
The pyrolytic semlting method of above-mentioned vanadium titano-magnetite, wherein in Step d the particle diameter of v-ti magnetite miberal powder be 0.01~
0.05mm。
Specific embodiment of the invention is further described with reference to embodiment, is not therefore limited the present invention
System is among described scope of embodiments.
Embodiment 1
A, take lime stone and coke, with pulverizer be ground into granularity≤agstone and coke blacking of below 0.07mm；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Coke blacking=300:3:0.8, mixing, compacting
It is blocking；
C, the briquetting for obtaining b step are calcined under argon gas protection in high temperature furnace, and calcining heat is 1750 DEG C, is forged
The burning time is 50min；
D, step c is calcined after material cool to the furnace and take out after room temperature, crush, enter in the case where magnetic separation strength is 2800Gs
Row magnetic separation, obtains the v-ti magnetite miberal powder that particle diameter is 0.01~0.05mm.
Full iron product grade is 77% in the v-ti magnetite miberal powder for finally giving, and iron recovery is 68%.
Embodiment 2
A, take lime stone and coke, with pulverizer be ground into granularity≤agstone and coke blacking of below 0.07mm；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Coke blacking=200:1.5:0.5, mixing, pressure
It is made block；
C, the briquetting for obtaining b step are calcined under argon gas protection in high temperature furnace, and calcining heat is 1700 DEG C, is forged
The burning time is 40min；
D, step c is calcined after material cool to the furnace and take out after room temperature, crush, enter in the case where magnetic separation strength is 2600Gs
Row magnetic separation, obtains the v-ti magnetite miberal powder that particle diameter is 0.01~0.05mm.
Full iron product grade is 76% in the v-ti magnetite miberal powder for finally giving, and iron recovery is 66%.
Embodiment 3
A, take lime stone and coke, with pulverizer be ground into granularity≤agstone and coke blacking of below 0.07mm；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Coke blacking=400:5:1, mixing is pressed into
Block；
C, the briquetting for obtaining b step are calcined under argon gas protection in high temperature furnace, and calcining heat is 1800 DEG C, is forged
The burning time is 60min；
D, step c is calcined after material cool to the furnace and take out after room temperature, crush, enter in the case where magnetic separation strength is 3000Gs
Row magnetic separation, obtains the v-ti magnetite miberal powder that particle diameter is 0.01~0.05mm.
Full iron product grade is 79% in the v-ti magnetite miberal powder for finally giving, and iron recovery is 65%.
Claims (7)
1. the pyrolytic semlting method of vanadium titano-magnetite, it is characterised in that：Comprise the following steps：
A, lime stone and coke are taken, crushed, obtain agstone and coke blacking；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Coke blacking=200~400:1.5~4:0.5~1,
Mixing, briquet；
C, the briquetting for obtaining b step are calcined under inert gas shielding, and calcining heat is 1700~1800 DEG C, during calcining
Between be 40~60min；
D, step c is calcined after material cool to the furnace and take out after room temperature, crush, magnetic separation obtains v-ti magnetite miberal powder.
2. the pyrolytic semlting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Agstone in a steps
Granularity≤0.07mm, the granularity≤0.07mm of coke blacking.
3. the pyrolytic semlting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Iron ore concentrate in b step:Lime
Stone flour:The weight ratio of coke blacking is 300:3:0.8.
4. the pyrolytic semlting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Inert gas described in step c
It is argon gas.
5. the pyrolytic semlting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Calcining heat is in step c
1750 DEG C, calcination time is 50min.
6. the pyrolytic semlting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Magnetic separation strength is in Step d
2500~3000Gs.
7. the pyrolytic semlting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Vanadium titano-magnetite in Step d
The particle diameter of powder is 0.01~0.05mm.
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| CN201611040736.7A CN106755955A (en) | 2016-11-24 | 2016-11-24 | The pyrolytic semlting method of vanadium titano-magnetite |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206718A (en) * | 2010-03-29 | 2011-10-05 | 攀钢集团钢铁钒钛股份有限公司 | Furnace charge for vanadium-titanium magnetite blast furnace smelting, and blast furnace smelting method |
| CN104212927A (en) * | 2014-08-15 | 2014-12-17 | 玉溪大红山矿业有限公司 | Production process for marking iron powder by taking vanadium titano-magnetite as raw materials |
| CN105907948A (en) * | 2016-06-27 | 2016-08-31 | 东北大学 | Magnetic separation method for low-grade chromium-containing vanadium titanium magnetite metalized pellet |
-
2016
- 2016-11-24 CN CN201611040736.7A patent/CN106755955A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206718A (en) * | 2010-03-29 | 2011-10-05 | 攀钢集团钢铁钒钛股份有限公司 | Furnace charge for vanadium-titanium magnetite blast furnace smelting, and blast furnace smelting method |
| CN104212927A (en) * | 2014-08-15 | 2014-12-17 | 玉溪大红山矿业有限公司 | Production process for marking iron powder by taking vanadium titano-magnetite as raw materials |
| CN105907948A (en) * | 2016-06-27 | 2016-08-31 | 东北大学 | Magnetic separation method for low-grade chromium-containing vanadium titanium magnetite metalized pellet |
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