CN104630458A - Preparation method of acidic chromium-containing vanadium-titanium sintered ore - Google Patents
Preparation method of acidic chromium-containing vanadium-titanium sintered ore Download PDFInfo
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- CN104630458A CN104630458A CN201510065078.6A CN201510065078A CN104630458A CN 104630458 A CN104630458 A CN 104630458A CN 201510065078 A CN201510065078 A CN 201510065078A CN 104630458 A CN104630458 A CN 104630458A
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- sintering
- sintered
- agglomerate
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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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
Abstract
The invention relates to a preparation method of acidic chromium-containing vanadium-titanium sintered ore, belonging to the technical field of metallurgy. The preparation method comprises the following steps: (1) preparing the following raw materials in percentage by weight: 5-20% of iron ore powder, 0-2.5% of white lime, 5-6% of coke powder and the balance of chromium-containing vanadium-titanium magnetite powder; (2) adding water into a mixer, and mixing to obtain a pellet material to be sintered; (3) distributing the material in a sintering machine, and igniting to perform downdraft sintering; and (4) when the sintering exhaust gas temperature drops to at most 100 DEG C, taking out the sintered material, crushing, and screening out the part with the particle size of 5-40mm, thereby obtaining the sintered ore. The method does not need substantial capital investment into wet-grinding equipment for wet-grinding, does not need any additive, ensures the low alkalinity and high grade of the finished product, partially or completely substitutes the acidic pellet ore, and can completely satisfy the quality requirements of the blast furnace for the acid burden.
Description
Technical field
The invention belongs to metallurgical technology field, particularly a kind of acidity is containing the preparation method of chromium type vanadium titanium agglomerate.
Background technology
The chromic vanadium-titanium ferroferrite that contains of China Chengde area contains higher iron, vanadium, titanium composition, has higher comprehensive utilization value.Current smelting is blast furnace process containing the optimum flow process of chromic vanadium-titanium ferroferrite, blast furnace feeding raw material is for arranging in pairs or groups containing chromium type vanadium titanium agglomerate and acid burden material, in order to obtain high-quality containing chromium type vanadium titanium agglomerate, the basicity of agglomerate is higher, for ensureing the blast-furnace slag basicity be suitable for, in Bf Burden, the proportioning of acid burden material must improve, and therefore the demand of blast furnace to acid burden material is very big.
The main acid burden material that current blast furnace adds is pellet, but general partially thick containing chromic vanadium-titanium ferroferrite granularity, and the thin concentrate resource of suitable for producing acidic pellet ore is shorter, produces the high expensive of pellet; Due to the restriction of pelletizing process itself, the efficiency of pelletizing process is lower, and pelletizing process requires also very strict to the shape and size of green-ball in addition, causes its production efficiency on the low side, is difficult to meet blast furnace demand.
Summary of the invention
The object of this invention is to provide the preparation method of a kind of acidity containing chromium type vanadium titanium agglomerate, by providing high-quality acid sinter ore to the blast furnace that is adjusted to of ordinary sinter technique and operating parameters, for blast-furnace smelting provides necessary guarantee.
Acidity of the present invention is carried out according to the following steps containing the preparation method of chromium type vanadium titanium agglomerate:
1, prepare raw material, wherein powdered iron ore accounts for 5 ~ 20% of gross weight, and lime accounts for 0 ~ 2.5% of gross weight, and coke powder accounts for 5 ~ 6% of gross weight, and all the other are for containing chromic vanadium-titanium ferroferrite powder;
2, mixed by whole raw material, then add water and put into mixer and mix, amount of water is 2 ~ 4% of whole raw material gross weight, has mixed the ball material to be sintered that rear acquisition diameter is 3 ~ 5mm;
3, by material to be sintered cloth in sinter machine, bed thickness is 600 ~ 700mm, and sinter machine carries out igniting down draft sintering; Sintering ignition temperature not 1150 ~ 1250 DEG C in sintering process, igniting negative pressure 6 ~ 7KPa, complete sintering when sintered discharge gas temperature starts to decline, sintering end point temperature is 320 ~ 400 DEG C, and sintering negative pressure is 12 ~ 14KPa;
4, when sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate.
The agglomerate Iron grade TFe that aforesaid method obtains is 58 ~ 66%, by weight percentage containing FeO 8 ~ 12%, SiO
24 ~ 6%, TiO
21.5 ~ 4.0%, V
2o
50.3 ~ 0.6%, Cr
2o
30.001 ~ 0.02%, basicity is 0.25 ~ 0.65.
The tumbler index of the agglomerate that aforesaid method obtains is 60 ~ 70%, and reduction degradation index is 60 ~ 90%, and reduction degree index is 50 ~ 65%.
The advantage of method of the present invention is: under same material condition, produce the acid chromium type vanadium titanium agglomerate that contains compared with pellet, pellet is when granularity of concentrate is thicker, in production process, wilkinite is too high with addition of amount, obviously not as low alkalinity acid sinter ore in grade, nor suitable basicity can be ensured.On cost, pellet is owing to carrying out fine grinding with addition of additive and to rough concentrate, needs supporting profit mill equipment, causes the cost of pellet higher than low alkalinity acid sinter ore; The acid production containing chromium type vanadium titanium agglomerate does not only need cost substantial contribution investment profit mill equipment to moisten mill, and do not need additive, ensure that low alkalinity and the higher-grade of finished product, partly or entirely substitute acidic pellet ore, the specification of quality of blast furnace to acid burden material can be met completely.
Accompanying drawing explanation
Fig. 1 is the preparation method schematic flow sheet of acidity of the present invention containing chromium type vanadium titanium agglomerate.
Embodiment
The agglomerating plant adopted in the embodiment of the present invention is NEU-2012 type sinter machine.
In the embodiment of the present invention, rotary drum exponential sum yield rate is tested by GB8209-87 standard, and cryogenic reducting powder index and reduction degree index are tested by GB/T13242-91 standard.
In the embodiment of the present invention, igniting passes into Sweet natural gas and air ignition.
Lime in the embodiment of the present invention is commercial, by weight percentage containing CaO >=80%, and granularity≤0.5mm.
Coke powder in the embodiment of the present invention is commercial, carbon content >=80%, granularity≤3mm.
The Iron grade containing chromic vanadium-titanium ferroferrite selected in the embodiment of the present invention is 56.0 ~ 66.0%, by weight percentage containing SiO
21.0 ~ 6.0%, CaO 0.4 ~ 2.6%, MgO 0.7 ~ 3.2%, Al
2o
30.6 ~ 1.9%, TiO
20.7 ~ 3.9%, V
2o
50.1 ~ 0.6%, Cr
2o
30.01 ~ 0.15%; Granularity≤0.5mm, and the part of granularity <0.074mm is no less than 70%.
The Iron grade TFe of the powdered iron ore adopted in the embodiment of the present invention is 45.0 ~ 65.0%, granularity granularity≤0.5mm, and the part of granularity <0.074mm is no less than 70%.
The agglomerate obtained in the embodiment of the present invention is by weight percentage containing FeO 8 ~ 12%, SiO
24 ~ 6%, TiO
21.5 ~ 4.0%, V
2o
50.3 ~ 0.6%, Cr
2o
30.001 ~ 0.02%.
Embodiment 1
Prepare raw material, wherein powdered iron ore accounts for 5% of gross weight, and coke powder accounts for 5% of gross weight, and all the other are for containing chromic vanadium-titanium ferroferrite powder;
Mixed by whole raw material, then add water and put into mixer and mix, amount of water is 2% of whole raw material gross weight, has mixed the ball material to be sintered that rear acquisition diameter is 3 ~ 5mm;
By material to be sintered cloth in sinter machine, bed thickness is 600mm, and sinter machine carries out igniting down draft sintering; Sintering ignition temperature not 1150 DEG C in sintering process, igniting negative pressure 6KPa, complete sintering when sintered discharge gas temperature starts to decline, sintering end point temperature is 320 DEG C, and sintering negative pressure is 12 ~ 14KPa;
When sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate; Agglomerate Iron grade TFe is 66%, and basicity is 0.25, and tumbler index is 65%, and reduction degradation index is 82%, and reduction degree index is 50%.
Embodiment 2
Prepare raw material, wherein powdered iron ore accounts for 10% of gross weight, and lime accounts for 1% of gross weight, and coke powder accounts for 5.5% of gross weight, and all the other are for containing chromic vanadium-titanium ferroferrite powder;
Mixed by whole raw material, then add water and put into mixer and mix, amount of water is 3% of whole raw material gross weight, has mixed the ball material to be sintered that rear acquisition diameter is 3 ~ 5mm;
By material to be sintered cloth in sinter machine, bed thickness is 650mm, and sinter machine carries out igniting down draft sintering; Sintering ignition temperature not 1200 DEG C in sintering process, igniting negative pressure 6KPa, complete sintering when sintered discharge gas temperature starts to decline, sintering end point temperature is 360 DEG C, and sintering negative pressure is 12 ~ 14KPa;
When sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate; Agglomerate Iron grade TFe is 64%, and basicity is 0.37, and tumbler index is 67%, and reduction degradation index is 86%, and reduction degree index is 53%.
Embodiment 3
Prepare raw material, wherein powdered iron ore accounts for 15% of gross weight, and lime accounts for 1.5% of gross weight, and coke powder accounts for 6% of gross weight, and all the other are for containing chromic vanadium-titanium ferroferrite powder;
Mixed by whole raw material, then add water and put into mixer and mix, amount of water is 4% of whole raw material gross weight, has mixed the ball material to be sintered that rear acquisition diameter is 3 ~ 5mm;
By material to be sintered cloth in sinter machine, bed thickness is 700mm, and sinter machine carries out igniting down draft sintering; Sintering ignition temperature not 1250 DEG C in sintering process, igniting negative pressure 7KPa, complete sintering when sintered discharge gas temperature starts to decline, sintering end point temperature is 400 DEG C, and sintering negative pressure is 12 ~ 14KPa;
When sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate; Agglomerate Iron grade TFe is 60%, and basicity is 0.48, and tumbler index is 70%, and reduction degradation index is 90%, and reduction degree index is 56%.
Embodiment 4
Prepare raw material, wherein powdered iron ore accounts for 20% of gross weight, and lime accounts for 2.5% of gross weight, and coke powder accounts for 5.5% of gross weight, and all the other are for containing chromic vanadium-titanium ferroferrite powder;
Mixed by whole raw material, then add water and put into mixer and mix, amount of water is 3% of whole raw material gross weight, has mixed the ball material to be sintered that rear acquisition diameter is 3 ~ 5mm;
By material to be sintered cloth in sinter machine, bed thickness is 650mm, and sinter machine carries out igniting down draft sintering; Sintering ignition temperature not 1200 DEG C in sintering process, igniting negative pressure 6KPa, complete sintering when sintered discharge gas temperature starts to decline, sintering end point temperature is 360 DEG C, and sintering negative pressure is 12 ~ 14KPa;
When sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate; Agglomerate Iron grade TFe is 58%, and basicity is 0.65, and tumbler index is 60%, and reduction degradation index is 60%, and reduction degree index is 65%.
Claims (3)
1. acidity is containing a preparation method for chromium type vanadium titanium agglomerate, it is characterized in that carrying out according to the following steps:
(1) prepare raw material, wherein powdered iron ore accounts for 5 ~ 20% of gross weight, and lime accounts for 0 ~ 2.5% of gross weight, and coke powder accounts for 5 ~ 6% of gross weight, and all the other are for containing chromic vanadium-titanium ferroferrite powder;
(2) mixed by whole raw material, then add water and put into mixer and mix, amount of water is 2 ~ 4% of whole raw material gross weight, has mixed the ball material to be sintered that rear acquisition diameter is 3 ~ 5mm;
(3) by material to be sintered cloth in sinter machine, bed thickness is 600 ~ 700mm, and sinter machine carries out igniting down draft sintering; Sintering ignition temperature not 1150 ~ 1250 DEG C in sintering process, igniting negative pressure 6 ~ 7KPa, complete sintering when sintered discharge gas temperature starts to decline, sintering end point temperature is 320 ~ 400 DEG C, and sintering negative pressure is 12 ~ 14KPa;
(4) when sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate.
2. a kind of acidity according to claim 1 is containing the preparation method of chromium type vanadium titanium agglomerate, it is characterized in that described agglomerate Iron grade TFe is 58 ~ 66%, by weight percentage containing FeO 8 ~ 12%, SiO
24 ~ 6%, TiO
21.5 ~ 4.0%, V
2o
50.3 ~ 0.6%, Cr
2o
30.001 ~ 0.02%, basicity is 0.25 ~ 0.65.
3. a kind of acidity according to claim 1 is containing the preparation method of chromium type vanadium titanium agglomerate, and it is characterized in that the tumbler index of described agglomerate is 60 ~ 70%, reduction degradation index is 60 ~ 90%, and reduction degree index is 50 ~ 65%.
Priority Applications (1)
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| CN201510065078.6A CN104630458B (en) | 2015-02-09 | 2015-02-09 | A kind of acidity preparation method containing chromium type vanadium titanium sintering deposit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107937714A (en) * | 2017-11-19 | 2018-04-20 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sinter with addition of ilmenite |
| CN110042227A (en) * | 2019-05-23 | 2019-07-23 | 中国恩菲工程技术有限公司 | Sinter and preparation method thereof |
| CN111593198A (en) * | 2019-02-20 | 2020-08-28 | 新疆八一钢铁股份有限公司 | Production method of acid sinter for iron-making blast furnace |
Citations (3)
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| CN101041867A (en) * | 2007-02-02 | 2007-09-26 | 攀枝花钢铁(集团)公司 | Sintering method for high-chromic vanadium-titanium ferroferrite |
| CN102443694A (en) * | 2011-12-08 | 2012-05-09 | 黑龙江建龙钢铁有限公司 | Sintering method of high-chromium and high-vanadium schreyerite |
| CN102443693A (en) * | 2011-12-08 | 2012-05-09 | 攀钢集团研究院有限公司 | Sintering method of high-grade high-titania vanadium-titanium magnetite concentrate |
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2015
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Patent Citations (3)
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| CN101041867A (en) * | 2007-02-02 | 2007-09-26 | 攀枝花钢铁(集团)公司 | Sintering method for high-chromic vanadium-titanium ferroferrite |
| CN102443694A (en) * | 2011-12-08 | 2012-05-09 | 黑龙江建龙钢铁有限公司 | Sintering method of high-chromium and high-vanadium schreyerite |
| CN102443693A (en) * | 2011-12-08 | 2012-05-09 | 攀钢集团研究院有限公司 | Sintering method of high-grade high-titania vanadium-titanium magnetite concentrate |
Non-Patent Citations (1)
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|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN107937714A (en) * | 2017-11-19 | 2018-04-20 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sinter with addition of ilmenite |
| CN111593198A (en) * | 2019-02-20 | 2020-08-28 | 新疆八一钢铁股份有限公司 | Production method of acid sinter for iron-making blast furnace |
| CN110042227A (en) * | 2019-05-23 | 2019-07-23 | 中国恩菲工程技术有限公司 | Sinter and preparation method thereof |
| CN110042227B (en) * | 2019-05-23 | 2021-08-03 | 中国恩菲工程技术有限公司 | Sintered ore and preparation method thereof |
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| CN104630458B (en) | 2016-08-17 |
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