CN104673957A - Composite treatment method for water containing vanadium chromium iron - Google Patents
Composite treatment method for water containing vanadium chromium iron Download PDFInfo
- Publication number
- CN104673957A CN104673957A CN201510114093.5A CN201510114093A CN104673957A CN 104673957 A CN104673957 A CN 104673957A CN 201510114093 A CN201510114093 A CN 201510114093A CN 104673957 A CN104673957 A CN 104673957A
- Authority
- CN
- China
- Prior art keywords
- vanadium
- iron
- chromium
- vanadium chromium
- hot melt
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a composite treatment method for water containing vanadium chromium iron and belongs to the field of iron and steel smelting. The composite treatment method comprises the following steps: immersing a spray gun into the water containing vanadium chromium iron to inject iron oxide powder, wherein carrier gas is nitrogen; meanwhile, injecting CO2 for molten iron in a bottom blowing way, and obtaining slags of vanadium and chromium and semisteel after injection is finished. The composite treatment method can reduce the dosage of iron oxides, improve the oxidation rate of vanadium and chromium and reduce the oxidation rate of carbon, is beneficial to utilization of resources, and reduces the production cost of vanadium and chromium.
Description
Technical field
The present invention relates to containing vanadium chromium hot melt compounding method, belong to field of iron and steel smelting.
Background technology
China is vanadium titano-magnetite big country, and climb steel, hold steel, Kun Gangdeng enterprise adopts vanadium titano-magnetite to smelt, the molten iron content of vanadium that vanadium titano-magnetite blast-furnace smelting goes out is high, and vanadium is a kind of important resource, therefore must vanadium extraction before molten iron-steelmaking, produces vanadium slag.At present, the production method producing vanadium slag is both at home and abroad more, and mainly contain New Zealand's hot metal ladle and blow vanadium technique, South Africa shaking ladle process for extracting vanadium, Russia and Chinese vanadium extraction by converter blowing technique etc., other process for extracting vanadium also comprises v-bearing steel slag vanadium extraction, process for extracting vanadium from stone coal etc.
The production process system of domestic and international vanadium extraction by converter blowing is and adds updating of refrigerant+process temperature+duration of blast.Vanadium extraction from hot metal is a selective oxidation technology.The vanadium extraction of converter air feed is an exothermic process, [Si], [Mn], [V], element oxide such as [C] makes molten bath be rapidly heated, and [Si], before [Mn] oxidation occurs in [V] oxidation, vanadium extraction can not suppress it to react, and [C], [V] invert point is greatly about about 1385 DEG C, therefore high oxidation rate and [V] yield of [V] will be obtained, vanadium-raising cooling agent must be added, control bath temperature to make it to approach [C], [V] invert point, reach the object that carbon is protected in vanadium extraction, [V] is down to less than 0.05%.The terminal half steel temperature of vanadium extraction is unsuitable too high, and vanadium extracting process is oxidized to master with vanadium early stage, and the later stage is reduced to master with vanadium, but to blow vanadium process be that vanadium is reduced to master.So what adopt when lowering the temperature is add refrigerant to make molten iron temperature drop to suitable scope, by the control of duration of blast and process temperature in converter smelting, by the vanadium oxidation in half steel, improve recovery rate.
Flos Bombacis Malabarici high lattice vanadium titano-magnetite mineral species is many, and ore structures is complicated, and the alloying technology difficulty such as iron, vanadium, titanium, chromium, nickel, cobalt selecting smelting to be separated in ore is large, is a worldwide technological puzzle to be captured.Under normal circumstances, in schreyerite thing vanadium with V
3+form be solid-solution in magnetite lattice, form vanadium iron spinel; Titanium is mainly with oxide compound TiO
2form be present in ulvite and ilmenite.Cr
3+with Fe
3+ionic radius is similar to, and ferric ion in trivalent chromium displacement titanomagnetite, in endoplasm with resembling.Chromium is the same with vanadium, and together with iron symbiosis, mineral are FeO (V, Cr)
2o
3spinel.In ore dressing process, chromium and vanadium more than 80% are enriched in iron ore concentrate.Good raw material basis has been established for jointly being extracted vanadium chromium by metallurgical method.Many Research Centers in one's power colleges and universities have all done a large amount of work to Hongge Deposit from selecting and purchasing, smelting, extraction and the separation of follow-up vanadium chromium, have established certain theory and practice basis.Captured multiple technical barrier at present, but also had many gordian technique bottlenecks apart from industrialization, Technology is still immature.
In existing blast furnace ironmaking-converter steelmaking process for extracting vanadium, titanium in vanadium titano-magnetite mainly enters blast furnace slag phase with uhligite form, vanadium, chromated oxide are reduced and enter iron phase, and oxidizedly in vanadium extraction by converter blowing process form vanadium iron respectively, the spinel structure of ferrochrome enters slag and forms vanadium slag mutually, the vanadium chromium remained in half steel can enter in the steelmaking slag of high alkalinity by partial oxidation in further steelmaking process.Because current molten iron chromium content is low, production technique is only for the recovery of Vanadium in Vanadium Residue, and the technique of employing is high temperature sodium roasting-water logging process for extracting vanadium.Due to the similarity of the physical chemistry behavior of vanadium chromium in metallurgical process, a large amount of chromium oxidations certainly will be made in the vanadium chromium hot melt vanadium extracting process taking Hongge Deposit as raw material to enter in slag, form the vanadium chromium slag of high chromium content.
From existing document, smelt about vanadium chromium hot melt and only have a small amount of commerical test report, owing to there being the participation of chromium, change to some extent containing the corresponding meeting of the oxidation characteristic of vanadium chromium hot melt in converter, the existence of chromated oxide in slag can affect the physical and chemical performance of vanadium chromium slag, the change that the thermodynamic condition that vanadium chromium can be caused to be oxidized and vanadium chromium distribute in slag and in half steel.
CN1789435 discloses a kind of vanadium extraction from hot metal control calcium refrigerant and vanadium extraction from hot metal control calcium technique, the chemical composition (Wt%) of its vanadium-raising cooling agent is: iron scale 56-60%, fine iron breeze 30-40%, bonding agent 5-10%, its vanadium extraction from hot metal control calcium technique is for add above-mentioned refrigerant at Primary period, this refrigerant can increase extraction yield and the v slag grade of vanadium, stablizes vanadium slag calcium oxide content.CN101338351 discloses a kind of vanadium-raising cooling agent and preparation method thereof and using method, this refrigerant with iron scale or vanadium extraction mud, containing vanadium iron concentrate, bonding agent for raw material production, ferriferous oxide containing 80%-95%, the V of SiO2,0.1-0.6% of 3-6%
2o
5, 1-3%MgCl
2.The using method of this refrigerant is that oxygen supply pressure is 0.6 ~ 0.8MPa, and oxygen-supplying amount is 8 ~ 12m3/t molten iron, and oxygen supply time is 240 ~ 340s by oxygen supply by lance after vanadium-bearing hot metal enters stove; In stove, add vanadium-raising cooling agent carry out Control for Kiln Temperature, the bath temperature after oxygen blast terminates is 1360 ~ 1420 DEG C, obtains vanadium slag and half steel.
From above-mentioned prior art, all only for the recovery of Vanadium in Vanadium Residue, the Adding Way of refrigerant is disposable adding, and its vanadium oxidation ratio needs to be improved further.To the process containing vanadium chromium hot melt, there is not pertinent literature.
Summary of the invention
The technical problem that the present invention solves is to provide containing vanadium chromium hot melt compounding method.
The present invention, containing vanadium chromium hot melt compounding method, comprises the steps:
Immerse spray gun containing ferriferous oxide powder of jetting in vanadium chromium hot melt, carrier gas is nitrogen; Adopt bottom blowing mode to jet CO to molten iron simultaneously
2, winding-up terminates rear acquisition vanadium chromium slag and half steel.
Wherein, nitrogen pressure is 0.3 ~ 0.8MPa, and the winding-up amount of ferriferous oxide powder is 20 ~ 60kg/tFe, and the injecting velocity of ferriferous oxide powder is 50 ~ 100kg/min, and gun slot depth of penetration is distance Iron bottom portion 500 ~ 1500mm.
Further, bottom blowing CO
2consumption controls at 0.10 ~ 0.50m
3between/(mintFe).
Further, described ferriferous oxide is at least one in powdered iron ore, iron scale and iron oxide red.
Further, the described composition containing vanadium chromium hot melt is: the total amount of [V]+[Cr] is 0.5% ~ 1.0%, and carbon content is 4.0% ~ 5.0%.
The present invention adopts Dual-Phrase Distribution of Gas olid blowing process to carry out vanadium extraction, and compared with prior art, the oxidation ratio that the present invention can reduce ferriferous oxide consumption, improve the oxidation ratio of vanadium and chromium, reduces carbon, the utilization and the vanadium extraction chromium production cost that are conducive to resource reduce.
Embodiment
The present invention, containing vanadium chromium hot melt compounding method, comprises the steps:
Immerse spray gun containing ferriferous oxide powder of jetting in vanadium chromium hot melt, carrier gas is nitrogen; Simultaneously to molten iron bottom blowing CO
2gas, winding-up terminates rear acquisition vanadium chromium slag and half steel.
Wherein, nitrogen pressure is 0.3 ~ 0.8MPa, and the winding-up amount of ferriferous oxide powder is 20 ~ 60kg/tFe, and the injecting velocity of ferriferous oxide powder is 50 ~ 100kg/min, and gun slot depth of penetration is distance Iron bottom portion 500 ~ 1500mm.
In winding-up process, bottom blowing CO
2consumption controls at 0.10 ~ 0.50m
3between/(mintFe).
Powder containing ferriferous oxide is all applicable to the present invention, and preferably, described ferriferous oxide is in powdered iron ore, iron scale, iron oxide red or at least one in the higher powder material of other oxides-containing irons.
Composition containing vanadium chromium hot melt in the present invention is: the total amount of [V]+[Cr] is between 0.5% ~ 1.0%, and carbon content is between 4.0% ~ 5.0%, and all the other compositions are without particular requirement.In the present invention, adopting existing technique to obtain containing vanadium chromium hot melt, as adopted technique being: high chromium vanadium titanium octahedral iron ore-blast furnace or electrosmelting-containing vanadium chromium hot melt.In the present invention, [V]+[Cr] represents the summation of content of vanadium and chromium content, and other are similar identical.Content of the present invention is weight percentage.
The present invention is mainly applicable to carry out vanadium chromium slag producing process containing vanadium chromium hot melt, and it specifically can adopt following steps:
(1) adopt Dual-Phrase Distribution of Gas olid blowing process to carry out vanadium extraction, after namely hot metal ladle enters into process station, spray gun is immersed in molten iron ferriferous oxide powder of jetting, carrier gas is nitrogen;
(2) spray gun is immersed in molten iron ferriferous oxide powder of jetting, described ferriferous oxide is comprise the composition of one or more containing ferriferous oxide such as powdered iron ore, iron scale, iron oxide red;
(3) nitrogen pressure controls between 0.3 ~ 0.8MPa, and pulvis injection amount is between 20 ~ 50kg/tFe, and pulvis injecting velocity controls between 50 ~ 100kg/min, gun slot depth of penetration in distance bag/tank at the bottom of distance at 500 ~ 1500mm;
(4) adopt bottom blowing mode to carry out CO to molten iron simultaneously
2winding-up, bottom blowing CO
2consumption controls at 0.10 ~ 0.50m
3between/(mintFe), claw/pull out vanadium chromium slag after winding-up terminates, gained half steel is transported to steel-making converter and makes steel.
Other concrete operations modes and the condition of the present invention's NM blowing vanadium extraction all can be same as the prior art, and as well known to those skilled in the art to this, therefore not to repeat here.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Embodiment 1
After 80t hot metal ladle enters process station, spray gun is immersed in molten iron ferriferous oxide powder of jetting, carrier gas is nitrogen, pulvis injection amount is at 20kg/tFe, distance 1500mm at the bottom of gun slot depth of penetration distance bag/tank, nitrogen pressure controls between 0.3MPa, and pulvis injecting velocity controls at 50kg/min, adopts bottom blowing CO simultaneously
2mode carries out stirring and protecting carbon, bottom blowing CO
2consumption controls at 0.50m
3/ (mintFe), pull vanadium chromium slag out after winding-up terminates, gained half steel is transported to steel-making converter and makes steel.Molten iron vanadium drops to 0.022% from 0.161%, and chromium drops to 0.087% from 0.326%, and oxidation of coal rate is 7.3%.
Embodiment 2
After 200t iron ladle enters process station, spray gun is immersed in molten iron ferriferous oxide powder of jetting, carrier gas is nitrogen, pulvis injection amount is at 60kg/tFe, gun insertion depth is with distance 500mm at the bottom of distance tank, nitrogen pressure controls at 0.8MPa, and pulvis injecting velocity controls at 100kg/min, adopts bottom blowing CO simultaneously
2mode carries out stirring and protecting carbon, bottom blowing CO
2consumption controls at 0.30m
3/ (mintFe), claw vanadium chromium slag after winding-up terminates, gained half steel is transported to steel-making converter and makes steel.Molten iron vanadium drops to 0.030% from 0.369%, and chromium drops to 0.059% from 0.217%, and oxidation of coal rate is 7.9%.
Embodiment 3
After 140t iron ladle enters process station, spray gun is immersed in molten iron ferriferous oxide powder of jetting, carrier gas is nitrogen, pulvis injection amount is at 30kg/tFe, gun insertion depth is with distance 1000mm at the bottom of distance tank, nitrogen pressure controls at 0.7MPa, and pulvis injecting velocity controls at 80kg/min, adopts bottom blowing CO simultaneously
2mode carries out stirring and protecting carbon, bottom blowing CO
2consumption controls at 0.10m
3/ (mintFe), claw vanadium chromium slag after winding-up terminates, gained half steel is transported to steel-making converter and makes steel.Molten iron vanadium drops to 0.030% from 0.268%, and chromium drops to 0.13% from 0.57%, and oxidation of coal rate is 9.6%.
To sum up, treatment process of the present invention, not only can reduce the content of vanadium and chromium in molten iron, oxidation of coal rate can also be reduced to less than 9.6%, compared with the oxidation of coal rate about 16% of existing technical finesse, the present invention can reduce the oxidation ratio of carbon, and the utilization and the vanadium extraction production cost that are conducive to resource reduce.
Claims (5)
1., containing vanadium chromium hot melt compounding method, it is characterized in that, comprise the steps:
Immerse spray gun containing ferriferous oxide powder of jetting in vanadium chromium hot melt, carrier gas is nitrogen; Adopt bottom blowing mode to jet CO to molten iron simultaneously
2, winding-up terminates rear acquisition vanadium chromium slag and half steel.
2. according to claim 1 containing vanadium chromium hot melt compounding method, it is characterized in that: nitrogen pressure is 0.3 ~ 0.8MPa, the winding-up amount of ferriferous oxide powder is 20 ~ 60kg/tFe, the injecting velocity of ferriferous oxide powder is 50 ~ 100kg/min, and gun slot depth of penetration is distance Iron bottom portion 500 ~ 1500mm.
3. according to claim 1 and 2 containing vanadium chromium hot melt compounding method, it is characterized in that: CO
2consumption is 0.10 ~ 0.50m
3/ (mintFe).
4. according to any one of claims 1 to 3 containing vanadium chromium hot melt compounding method, it is characterized in that: described ferriferous oxide is at least one of powdered iron ore, iron scale and iron oxide red.
5. according to claims 1 to 4 containing vanadium chromium hot melt compounding method, it is characterized in that: the described composition containing vanadium chromium hot melt is: the total amount of [V]+[Cr] is 0.5% ~ 1.0%, and carbon content is 4.0% ~ 5.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510114093.5A CN104673957B (en) | 2015-03-16 | 2015-03-16 | Containing vanadium and chromium molten iron compounding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510114093.5A CN104673957B (en) | 2015-03-16 | 2015-03-16 | Containing vanadium and chromium molten iron compounding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104673957A true CN104673957A (en) | 2015-06-03 |
| CN104673957B CN104673957B (en) | 2016-08-24 |
Family
ID=53309539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510114093.5A Active CN104673957B (en) | 2015-03-16 | 2015-03-16 | Containing vanadium and chromium molten iron compounding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104673957B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195142A (en) * | 2019-07-12 | 2019-09-03 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for improving vanadium extraction by converter blowing vanadium yield |
| CN111763794A (en) * | 2020-06-10 | 2020-10-13 | 北京科技大学 | Method for smelting stainless steel by mixed blowing of chromium ore powder and carbon powder in TSR converter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
| CN102660659A (en) * | 2012-04-20 | 2012-09-12 | 北京科技大学 | Converter vanadium extraction process adopting top blowing oxygen lance to blow cooling agents |
| CN103952517A (en) * | 2014-04-24 | 2014-07-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Treatment method for water containing vanadium, chromium and iron and smelting process for high chromium vanadium titanium magnetite concentrate |
| CN103966390A (en) * | 2014-05-05 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium through top-bottom combined blowing converter |
| CN103981321A (en) * | 2014-05-05 | 2014-08-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Top-bottom combined blowing converter vanadium extraction method |
| CN103981322A (en) * | 2014-05-05 | 2014-08-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Top-bottom combined blowing converter vanadium extraction method |
-
2015
- 2015-03-16 CN CN201510114093.5A patent/CN104673957B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
| CN102660659A (en) * | 2012-04-20 | 2012-09-12 | 北京科技大学 | Converter vanadium extraction process adopting top blowing oxygen lance to blow cooling agents |
| CN103952517A (en) * | 2014-04-24 | 2014-07-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Treatment method for water containing vanadium, chromium and iron and smelting process for high chromium vanadium titanium magnetite concentrate |
| CN103966390A (en) * | 2014-05-05 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium through top-bottom combined blowing converter |
| CN103981321A (en) * | 2014-05-05 | 2014-08-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Top-bottom combined blowing converter vanadium extraction method |
| CN103981322A (en) * | 2014-05-05 | 2014-08-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Top-bottom combined blowing converter vanadium extraction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195142A (en) * | 2019-07-12 | 2019-09-03 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for improving vanadium extraction by converter blowing vanadium yield |
| CN111763794A (en) * | 2020-06-10 | 2020-10-13 | 北京科技大学 | Method for smelting stainless steel by mixed blowing of chromium ore powder and carbon powder in TSR converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104673957B (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105039633A (en) | Method for extracting vanadium from converter | |
| CN106065435A (en) | A kind of method and system processing vanadium slag | |
| CN108048618A (en) | A kind of converter CO2The method of vanadium extraction | |
| CN110055371A (en) | The method that molten iron production vanadium slag containing sodium directly leaches vanadium extraction | |
| CN110218837A (en) | A kind of method of recycling harmlessness disposing aluminium ash | |
| CN108179245A (en) | A kind of composite air supply vanadium extraction by converter blowing method | |
| CN102268502B (en) | Spongy iron preparation method by smelting refractory iron ore (slag) with reduction rotary kiln | |
| CN110106307A (en) | Using the extraction vanadium method of sodium salt processing vanadium-bearing hot metal | |
| CN105219974A (en) | A kind of raising vanadium slag V 2o 5the method of content | |
| CN105385861A (en) | Oxidation and calcification treatment method for vanadium slag | |
| CN104673957A (en) | Composite treatment method for water containing vanadium chromium iron | |
| CN103451450B (en) | Method for comprehensively utilizing serpentine containing nickel | |
| CN104480245A (en) | Method for extracting vanadium from molten iron containing vanadium | |
| CN105219975A (en) | A kind for the treatment of process of vanadium slag | |
| CN104789729B (en) | The processing method of containing vanadium and chromium molten iron | |
| CN104694695B (en) | Method for extracting vanadium and chromium through top-bottom combined blowing converter | |
| CN110079641A (en) | The method of the converter producing and its Oxidation Leaching vanadium extraction of sodium system vanadium slag | |
| CN104673959B (en) | Method for extracting vanadium and chromium by using top-bottom combined blowing converter | |
| CN110042191A (en) | The method of converter producing vanadium slag containing sodium and its Oxidation Leaching | |
| CN104561427B (en) | Method for extracting vanadium from vanadium-containing molten iron | |
| CN104711387B (en) | Method for extracting vanadium and chromium in converter through top-bottom combined blowing | |
| CN104673956B (en) | Method for extracting vanadium and chromium in converter | |
| CN104673958B (en) | Method for extracting vanadium and chromium by using top-bottom combined blowing converter | |
| CN112410498A (en) | Production method for extracting vanadium by spraying powder at bottom of converter | |
| CN110055372A (en) | Using the extraction vanadium method of compounds containing sodium processing vanadium-bearing hot metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |