CN106636506A - Blast furnace smelting method of vanadium titano-magnetite - Google Patents
Blast furnace smelting method of vanadium titano-magnetite Download PDFInfo
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- CN106636506A CN106636506A CN201611040708.5A CN201611040708A CN106636506A CN 106636506 A CN106636506 A CN 106636506A CN 201611040708 A CN201611040708 A CN 201611040708A CN 106636506 A CN106636506 A CN 106636506A
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- magnetite
- blast furnace
- vanadium titano
- smelting method
- furnace smelting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a smelting method of iron ores, in particular to a blast furnace smelting method of vanadium titano-magnetite. The blast furnace smelting method of the vanadium titano-magnetite comprises the following steps: (a) limestone is taken for crushing and grinding to obtain limestone powder; (b) the batching is performed according to the following weight ratio: iron ore concentrates: the weight ratio of iron concentrates to the limestone powder to dust removing ash is 200-400: 1.5-4: 1.5-3; and meanwhile, the slag alkalinity is adjusted within 1.4-1.7; (c) after the limestone powder and the dust removing ash are mixed, a blast furnace bypass air port branch pipe is used for spraying the mixture into a blast furnace combustion area; and the mixture is calcined by 40-60 min at 900-1100 DEG C; and (d) the material calcined in the step (c) is cooled to the room temperature along with a furnace, is taken out, and is crushed and grinded to obtain vanadium titano-magnetite powder. The blast furnace smelting method of the vanadium titano-magnetite uses the dust removing ash and the limestone powder for blast furnace calcining reduction to reduce impurities in the vanadium titano-magnetite, to promote recycling of resources and to improve the grade of iron in the vanadium titano-magnetite.
Description
Technical field
The present invention relates to a kind of smelting process of iron mine, and in particular to a kind of blast furnace smelting 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 bed is widely distributed, rich reserves, the 3rd of the national iron mine of reserves and yield residence, 98.3 hundred million tons of proved reserves, far
Scape reserves are up to more than 30,000,000,000 tons.
At present 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 response rate.Accordingly, it would be desirable to ferrum
The preparation technology of concentrate is improved, and to improve the grade and the response rate of iron ore concentrate, is increased economic efficiency.
The content of the invention
The technical problem to be solved is to provide a kind of blast furnace smelting method of vanadium titano-magnetite.
The blast furnace smelting method of vanadium titano-magnetite of the present invention, comprises the following steps：
A, limestone is taken, crushed, grinding obtains agstone；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Dedusting ash=200～400:1.5～4:1.5
～3, while it is 1.4～1.7 to adjust slag basicity；
C, by agstone and dedusting ash mixing after, sprayed in blast-furnace roasting area with blast furnace side air port arm, 900～
40～60min is calcined at 1100 DEG C；
D, step c is calcined after material cool to the furnace after room temperature take out, crush, grinding, obtain v-ti magnetite breeze.
Granularity≤the 0.07mm of agstone in the blast furnace smelting method of above-mentioned vanadium titano-magnetite, wherein a steps.
Further, the blast furnace smelting method of above-mentioned vanadium titano-magnetite, wherein iron ore concentrate in b step:Agstone:Dedusting
The weight ratio of ash is 300:3:2.
Further, the blast furnace smelting method of above-mentioned vanadium titano-magnetite, it is 1.5 that slag basicity is adjusted wherein in b step.
Further, the blast furnace smelting method of above-mentioned vanadium titano-magnetite, calcining heat is 1000 DEG C wherein in step c, is forged
The burning time is 50min.
In the blast furnace smelting method of above-mentioned vanadium titano-magnetite, wherein Step d the particle diameter of v-ti magnetite breeze be 0.01～
0.05mm。
The blast furnace smelting method of vanadium titano-magnetite of the present invention, using dedusting ash and agstone, is reduced by blast-furnace roasting,
The impurity in vanadium titano-magnetite is reduced, the recycling of resource is promoted, the grade of ferrum in vanadium titano-magnetite is improve, finally
Grade ＞ 72% of full iron product in sefstromite concentrate powder.
Specific embodiment
The blast furnace smelting method of vanadium titano-magnetite of the present invention, comprises the following steps：
A, limestone is taken, crushed, grinding obtains agstone；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Dedusting ash=200～400:1.5～4:1.5
～3, while it is 1.4～1.7 to adjust slag basicity；
C, by agstone and dedusting ash mixing after, sprayed in blast-furnace roasting area with blast furnace side air port arm, 900～
40～60min is calcined at 1100 DEG C；
D, step c is calcined after material cool to the furnace after room temperature take out, crush, grinding, obtain v-ti magnetite breeze.
Granularity≤the 0.07mm of agstone in the blast furnace smelting method of above-mentioned vanadium titano-magnetite, wherein a steps.
Further, the blast furnace smelting method of above-mentioned vanadium titano-magnetite, wherein iron ore concentrate in b step:Agstone:Dedusting
The weight ratio of ash is 300:3:2.
Further, the blast furnace smelting method of above-mentioned vanadium titano-magnetite, it is 1.5 that slag basicity is adjusted wherein in b step.
Further, the blast furnace smelting method of above-mentioned vanadium titano-magnetite, calcining heat is 1000 DEG C wherein in step c, is forged
The burning time is 50min.
In the blast furnace smelting method of above-mentioned vanadium titano-magnetite, wherein Step d the particle diameter of v-ti magnetite breeze be 0.01～
0.05mm。
The specific embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit
System is among described scope of embodiments.
Embodiment 1
A, take limestone, with pulverizer be ground into granularity≤agstone of below 0.07mm；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Dedusting ash=300:3:2, while adjusting slag
Basicity is 1.5；
C, by agstone and dedusting ash mixing after, sprayed in blast-furnace roasting area, at 1000 DEG C with blast furnace side air port arm
Lower calcining 50min；
D, step c is calcined after material cool to the furnace and taken out after room temperature, crush, grinding, obtain particle diameter for 0.01～
The v-ti magnetite breeze of 0.05mm.
Full iron product grade is 76% in the v-ti magnetite breeze for finally giving.
Embodiment 2
A, take limestone, with pulverizer be ground into granularity≤agstone of below 0.07mm；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Dedusting ash=200:1.5:2.5, while adjustment
Slag basicity is 1.4；
C, by agstone and dedusting ash mixing after, sprayed in blast-furnace roasting area, at 900 DEG C with blast furnace side air port arm
Calcining 60min；
D, step c is calcined after material cool to the furnace and taken out after room temperature, crush, grinding, obtain particle diameter for 0.01～
The v-ti magnetite breeze of 0.05mm.
Full iron product grade is 78% in the v-ti magnetite breeze for finally giving.
Embodiment 3
A, take limestone, with pulverizer be ground into granularity≤agstone of below 0.07mm；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Dedusting ash=400:5:3, while adjusting slag
Basicity is 1.7；
C, by agstone and dedusting ash mixing after, sprayed in blast-furnace roasting area, at 1100 DEG C with blast furnace side air port arm
Lower calcining 40min；
D, step c is calcined after material cool to the furnace and taken out after room temperature, crush, grinding, obtain particle diameter for 0.01～
The v-ti magnetite breeze of 0.05mm.
Full iron product grade is 79% in the v-ti magnetite breeze for finally giving.
Claims (6)
1. the blast furnace smelting method of vanadium titano-magnetite, it is characterised in that：Comprise the following steps：
A, limestone is taken, crushed, grinding obtains agstone；
B, carry out dispensing, iron ore concentrate according to following weight ratio:Agstone:Dedusting ash=200～400:1.5～4:1.5～3,
It is 1.4～1.7 to adjust slag basicity simultaneously；
C, by agstone and dedusting ash mixing after, sprayed in blast-furnace roasting area, at 900～1100 DEG C with blast furnace side air port arm
40～60min of lower calcining；
D, step c is calcined after material cool to the furnace after room temperature take out, crush, grinding, obtain v-ti magnetite breeze.
2. the blast furnace smelting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Agstone in a steps
Granularity≤0.07mm.
3. the blast furnace smelting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Iron ore concentrate in b step:Calx
Stone powder:The weight ratio of dedusting ash is 300:3:2.
4. the blast furnace smelting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Slag alkali is adjusted in b step
Spend for 1.5.
5. the blast furnace smelting method of vanadium titano-magnetite according to claim 1, it is characterised in that：Calcining heat is in step c
1000 DEG C, calcination time is 50min.
6. the blast furnace smelting 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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| CN201611040708.5A CN106636506A (en) | 2016-11-24 | 2016-11-24 | Blast furnace smelting method of vanadium titano-magnetite |
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| CN201611040708.5A CN106636506A (en) | 2016-11-24 | 2016-11-24 | Blast furnace smelting method of vanadium titano-magnetite |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381809A (en) * | 2008-11-07 | 2009-03-11 | 攀枝花新钢钒股份有限公司 | Method for preparing sintering ore of vanadium-titanium magnetite ore |
| CN103361453A (en) * | 2012-03-28 | 2013-10-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast-furnace smelting method for vanadium-titanium magnetite |
| CN104561530A (en) * | 2014-12-26 | 2015-04-29 | 河北钢铁股份有限公司承德分公司 | Medium-titanium high-strength sintered ore and preparation method thereof |
| CN104673951A (en) * | 2015-03-20 | 2015-06-03 | 攀钢集团西昌钢钒有限公司 | Blast furnace smelting method by using vanadium-titanium two-phase sintering ore |
-
2016
- 2016-11-24 CN CN201611040708.5A patent/CN106636506A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381809A (en) * | 2008-11-07 | 2009-03-11 | 攀枝花新钢钒股份有限公司 | Method for preparing sintering ore of vanadium-titanium magnetite ore |
| CN103361453A (en) * | 2012-03-28 | 2013-10-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast-furnace smelting method for vanadium-titanium magnetite |
| CN104561530A (en) * | 2014-12-26 | 2015-04-29 | 河北钢铁股份有限公司承德分公司 | Medium-titanium high-strength sintered ore and preparation method thereof |
| CN104673951A (en) * | 2015-03-20 | 2015-06-03 | 攀钢集团西昌钢钒有限公司 | Blast furnace smelting method by using vanadium-titanium two-phase sintering ore |
Non-Patent Citations (1)
| Title |
|---|
| 储满: "《钢铁冶金原燃料及辅助材料》", 31 January 2010 * |
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