CN106350633A - Method for slag regulation of smelting of vanadium extracting converter - Google Patents
Method for slag regulation of smelting of vanadium extracting converter Download PDFInfo
- Publication number
- CN106350633A CN106350633A CN201610989803.3A CN201610989803A CN106350633A CN 106350633 A CN106350633 A CN 106350633A CN 201610989803 A CN201610989803 A CN 201610989803A CN 106350633 A CN106350633 A CN 106350633A
- Authority
- CN
- China
- Prior art keywords
- slag
- corundum
- vanadium
- converter
- modifying agent
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
Abstract
The invention relates to a method for slag regulation of smelting of a vanadium extracting converter, and belongs to the technical field of converter vanadium extraction. The invention aims to solve the technical problem of providing the method for slag regulation of smelting of the vanadium extracting converter, which can further reduce iron loss. The method comprises the following steps: mixing molten iron containing vanadium and titanium into a converter, adding a corundum slag modifier in 1 minute before the end of converting, and performing tapping after the converting to obtain semi-steel and vanadium slag. According to the method provided by the invention, before the end of the converting, the corundum slag modifier is adopted to regulate slag, so that the vanadium slag content of the converter can be controlled in a suitable range before tapping of the converter so as to achieve the aims of reducing the melting point of the vanadium slag, optimizing a slag-iron separation effect of the vanadium slag, and reducing the consumption of iron and steel materials.
Description
Technical field
The present invention relates to converter extracting vanadium smelts Slag modification method, belong to vanadium extraction by converter blowing technical field.
Background technology
The cardinal principle of vanadium extraction is exactly the principle using selective oxidation, using high speed pure oxygen jet in top-blown converter to containing
Vanadium-containing molten iron is stirred, and the vanadium in molten iron is oxidized to a kind of physical-chemical reaction that the stable barium oxide of high price produces vanadium slag
Process.Pass through during the course of the reaction to add coolant to control bath temperature below carbon vanadium inversion temperature, reach " going vanadium to protect carbon "
Purpose.
The oxidation reaction of vanadium is:
2/3[v]+1/2{o2}=1/3 (v2o3) (1)
2 [v]+3 (feo)=(v2o3)+3[fe] (2)
Vanadium, under the conditions of oxygen blast, has 2 kinds of reactions, and one is that in molten iron, [v] and oxygen direct oxidation are reacted, and another kind is oxygen
Gas and ferrum react generation feo, and feo reacts generation v again with v2o3, ferrum in molten iron strongly aoxidizes and forms irony blowing the vanadium initial stage
First slag, after irony slag occurs from the teeth outwards, because it has oxidisability, is reacted on interface in metal-slag immediately
(2), wherein reaction (2) is dominant response, because the mass fraction of fe is significantly greater than the mass fraction of v in molten iron in molten iron, its
More than 90%, substantial amounts of fe is contacted middle fe with oxygen, generates feo, and only a small amount of v directly occurs oxidation reaction with oxygen.
Because vanadium extraction reaction is mainly reacted between irony first slag and molten iron level.Vanadium oxidation is mainly to react the side of (2)
Formula is carried out, and for promoting the oxidation of vanadium, vanadium extraction oxygen blast terminates to contain substantial amounts of feo in slag, simultaneously because the stirring of high speed oxygen jet
Mix, tiny iron shot wrapped folder is in vanadium slag in a large number.Now, if vanadium extraction oxygen blast terminates, directly the tapping of falling stove, pour out vanadium slag, in a large number
Metallic iron can pour out with vanadium slag and run off.
For overcoming disadvantages described above, the method commonly used at present is carbonaceous reducing agent or adds ferrosilicon to reduce feo, reduces ferrum
Damage.Because vanadium extraction terminal turns, in-furnace temperature is relatively low, and typically at 1350～1400 DEG C, at this temperature, conventional carbonaceous is also
Former dose cannot melt in the half steel or in vanadium slag, therefore limited use.
Patent cn104195283a discloses a kind of vanadium slag modifying agent and the vanadium extraction by converter blowing smelting process of vanadium extraction by converter blowing.Vanadium slag
Modifying agent is the ferrosilicon granule being made up of the si of 65～70 weight portions and the fe of 30～35 weight portions.Vanadium extraction by converter blowing smelting process bag
Include: after vanadium extraction by converter blowing oxygen blast terminates, enter ferrosilicon granule in Converter top of the slag upslide, standing, then stove goes out half steel and vanadium slag,
Wherein, the particle diameter of described ferrosilicon granule is not more than 3mm.The addition of described ferrosilicon granule is 0.1～0.2kg/ ton steel.By this
The use of vanadium slag modifying agent, can reduce all iron content in vanadium slag, and is able to ensure that or improves v slag grade.
But, using ferrosilicon as vanadium slag modifying agent, the silicone content in molten steel can be increased, increase heat, and after use, though
So a certain degree of all iron content reducing in vanadium slag of energy, but all iron content in vanadium slag is still higher, needs further fall
Low.Although ferrosilicon reduce vanadium slag oxidisability, promote slag sluicing system effectiveness comparison good, ferrosilicon price costly, typically
For 6000 yuan/t about, relatively costly.
Content of the invention
For problem above, present invention solves the technical problem that being to provide a kind of vanadium extraction that can reduce iron loss further to turn
Slag modification method smelted by stove.
Converter extracting vanadium of the present invention smelts Slag modification method, and hot metal containing V-Ti is blended in converter, in 1min before finishing blowing, plus
Enter corundum dreg modifying agent, after finishing blowing, tapping, obtain half steel and vanadium slag；
Wherein, described corundum dreg modifying agent consists of the following components in percentage by weight: corundum slag is 95～98%, remaining
For binding agent.
Wherein, the chemical composition of described hot metal containing V-Ti be c:3.5～4.8%, si:0.1～1.0%, mn:0.1～
1.0%th, v:0.05～0.4%, ti:0.05～0.5%, remaining be tfe.
Preferably, the addition of corundum dreg modifying agent is determined according to molten iron si content.When molten iron si content≤0.04%
When, the addition of corundum dreg modifying agent is 1.7～2.0kg/t ferrum；When 0.04% ＜ molten iron si content≤0.07%, corundum slag
The addition of modifying agent is 1.3～1.5kg/t ferrum；When 0.07% ＜ molten iron si content≤0.11%, corundum dreg modifying agent
Addition is 1.0～1.2kg/t ferrum, and molten iron si content ＞ 0.11% is then not added with corundum dreg modifying agent.
Further, preferably described corundum dreg modifying agent is spherical, and particle diameter is 30～50mm.
Further, the chemical composition of preferably described corundum slag is: al2o3: 55～65%, mgo:20～30%, cao:5
～10%, v2o5: 5～10%.
Preferably, the granularity of described corundum slag is 1～3mm.
Preferably, described binding agent is high-strength cement.
Compared with prior art, the invention has the following beneficial effects:
The present invention before finishing blowing, using corundum dreg modifying agent residue adjustment, can be just by Converter Vanadium-bearing Slag before converter tapping
Composition Control, in a suitable scope, to reduce vanadium slag fusing point, optimizes vanadium slag slag sluicing system effect, reduction iron and steel stock disappears
The purpose of consumption.Using method of the invention, it is possible on the premise of not affecting half composition of steel and vanadium slag quality, by vanadium slag
Tfe content is reduced to less than 15%.The corundum slag price that the present invention adopts, typically within 2000 yuan/t, has obvious price
Advantage.
Specific embodiment
Converter extracting vanadium of the present invention smelts Slag modification method, and hot metal containing V-Ti is blended in converter, in 1min before finishing blowing, plus
Enter corundum dreg modifying agent, after finishing blowing, tapping, obtain half steel and vanadium slag；
Wherein, described corundum dreg modifying agent consists of the following components in percentage by weight: the side-product after hydrometallurgy is firm
Beautiful slag is 95～98%, and remaining is binding agent.Corundum slag ordinary circumstance is bulk, and the process reducing in lumpiness has many thin
Little powder, feeding warehouse for convenience, ensure that bin blanking is smooth, is preferably pressed into substantially suitable spherical of granularity simultaneously.
Wherein, the chemical composition of described hot metal containing V-Ti be c:3.5～4.8%, si:0.1～1.0%, mn:0.1～
1.0%th, v:0.05～0.4%, ti:0.05～0.5%, remaining be tfe (full ferrum).
The temperature of hot metal containing V-Ti is 1250～1390 DEG C.
The inventive method is applied to the situation of molten iron silicon content≤0.11% after blowing.Preferably, according to molten iron si content
To determine the addition of corundum dreg modifying agent.When molten iron si content≤0.04%, the addition of corundum dreg modifying agent is 1.7～
2.0kg/t ferrum；When 0.04% ＜ molten iron si content≤0.07%, the addition of corundum dreg modifying agent is 1.3～1.5kg/t
Ferrum；When 0.07% ＜ molten iron si content≤0.11%, the addition of corundum dreg modifying agent is 1.0～1.2kg/t ferrum, molten iron si
Content ＞ 0.11%, then be not added with corundum dreg modifying agent.
Further, preferably described corundum dreg modifying agent is spherical, and particle diameter is 30～50mm.
Further, preferably described corundum slag is the side-product after hydrometallurgy, and its chemical composition is preferably: al2o3: 55
～65%, mgo:20～30%, cao:5～10%, v2o5: 5～10%.
Preferably, the granularity of described corundum slag is 1～3mm.
Binding agent commonly used in the art is all applied to the present invention.Preferably, described binding agent is high-strength cement.
The corundum dreg modifying agent of the present invention preferably employs following method and prepares: corundum solid impurity particle is fully mixed with binding agent
After conjunction, be mechanically pressed into the bead of 30～50mm through ball press, then toasted remove moisture removal after, obtain corundum slag modified
Agent.
The vanadium extraction by converter blowing operation that the present invention does not mention is state of the art, will not be described here.
With reference to embodiment, the specific embodiment of the present invention is further described, therefore the present invention is not limited
System is among described scope of embodiments.
Embodiment 1
Corundum slag, high-strength cement are added water according to the following ratio and be sufficiently mixed: corundum slag: 95%, high-strength cement: 5%,
It is pressed into the pelletizing of a diameter of 35mm using ball press, go through overbaking after water, to make corundum dreg modifying agent finished product, wherein, corundum
The composition of slag is al2o3: 60%, mgo:25%, cao:7.5%, v2o5: 7.5%.
In the 120 tons of converters of certain steel mill, its half steel molten steel discrepancy amount is 133t.1min before bessemerizing end, measures ferrum
Si content in water is 0.04%, adds this kind of corundum dreg modifying agent finished product 1.8kg/t steel, after finishing blowing, tapping.Sampled
Analysis, in vanadium slag, tfe content is down to 14% by original 37%, and vanadium slag tfe is effectively reduced.
Embodiment 2
Corundum slag, high-strength cement are added water according to the following ratio and be sufficiently mixed: corundum slag: 98%, high-strength cement: 2%,
It is pressed into the pelletizing of a diameter of 50mm using ball press, go through overbaking after water, to make corundum dreg modifying agent finished product, wherein, its
In, the composition of corundum slag is al2o3: 60%, mgo:25%, cao:7.5%, v2o5: 7.5%.
In the 120 tons of converters of certain steel mill, its half steel molten steel discrepancy amount is 135t.1min before bessemerizing end, measures ferrum
Si content in water is 0.05%, adds this kind of corundum dreg modifying agent finished product 1.4kg/t steel, after finishing blowing, tapping.Sampled
Analysis, in vanadium slag, tfe content is down to 13% by original 38%, and vanadium slag tfe is effectively reduced.
Embodiment 3
Corundum slag, high-strength cement are added water according to the following ratio and be sufficiently mixed: corundum slag: 95%, high-strength cement: 5%,
It is pressed into the pelletizing of a diameter of 30mm using ball press, go through overbaking after water, to make corundum dreg modifying agent finished product, wherein, its
In, the composition of corundum slag is al2o3: 60%, mgo:25%, cao:7.5%, v2o5: 7.5%.
In the 120 tons of converters of certain steel mill, its half steel molten steel discrepancy amount is 133t.1min before bessemerizing end, measures ferrum
Si content in water is 0.08%, adds this kind of vanadium slag modifying agent finished product 1.1kg/t steel, after finishing blowing, tapping.Sampled point
Analysis, in vanadium slag, tfe content is down to 13% by original 38%, and vanadium slag tfe is effectively reduced.
Comparative example 1
In the 120 tons of converters of certain steel mill, its half steel molten steel discrepancy amount is 130t, bessemerizing end, not plus any residue adjustment
The i.e. tapping of falling stove of material.Sampled analysis, in slag, tfe content is up to 40%, and in vanadium slag, tfe content is higher, slag iron is regardless of carrying
Vanadium cost dramatically increases.
Comparative example 2
In the 120 tons of converters of certain steel mill, its half steel molten steel discrepancy amount is 133t.1min before bessemerizing end, measures ferrum
Si content in water is 0.08%, adds the ferrosilicon granule (silicon in example 1 in the composition of this ferrosilicon granule and cn104195283a
Iron particle is identical) 1.1kg/t steel, after finishing blowing, tapping.Sampled analysis, in vanadium slag, tfe content is down to by original 36%
19%, vanadium slag tfe is effectively reduced, but certainly increased the cost of smelting.
Claims (7)
1. converter extracting vanadium smelts Slag modification method it is characterised in that comprising the steps: hot metal containing V-Ti is blended in converter, blows
Refining terminates in front 1min, adds corundum dreg modifying agent, after finishing blowing, tapping, and obtain half steel and vanadium slag；
Wherein, described corundum dreg modifying agent consists of the following components in percentage by weight: corundum slag is 95～98%, and remaining is viscous
Knot agent.
2. converter extracting vanadium according to claim 1 smelt Slag modification method it is characterised in that: the chemistry of described hot metal containing V-Ti
Composition be c:3.5～4.8%, si:0.1～1.0%, mn:0.1～1.0%, v:0.05～0.4%, ti:0.05～0.5%,
Remaining is tfe.
3. converter extracting vanadium according to claim 1 and 2 smelt Slag modification method it is characterised in that: according to molten iron si content Lai
Determine the addition of corundum dreg modifying agent, when si content≤0.04% in molten iron, the addition of corundum dreg modifying agent is 1.7～
2.0kg/t ferrum；When 0.04% ＜ molten iron si content≤0.07%, the addition of corundum dreg modifying agent is 1.3～1.5kg/t
Ferrum；When 0.07% ＜ molten iron si content≤0.11%, the addition of corundum dreg modifying agent is 1.0～1.2kg/t ferrum, molten iron si
Content ＞ 0.11%, then be not added with corundum dreg modifying agent.
4. converter extracting vanadium according to any one of claims 1 to 3 smelt Slag modification method it is characterised in that: described corundum slag
Modifying agent is spherical, and particle diameter is 30～50mm.
5. converter extracting vanadium according to any one of Claims 1 to 4 smelt Slag modification method it is characterised in that: described corundum slag
Chemical composition be: al2o3: 55～65%, mgo:20～30%, cao:5～10%, v2o5: 5～10%.
6. converter extracting vanadium according to any one of Claims 1 to 5 smelt Slag modification method it is characterised in that: described corundum slag
Granularity be 1～3mm.
7. converter extracting vanadium according to any one of claim 1～6 smelt Slag modification method it is characterised in that: described binding agent
For cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989803.3A CN106350633A (en) | 2016-11-10 | 2016-11-10 | Method for slag regulation of smelting of vanadium extracting converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989803.3A CN106350633A (en) | 2016-11-10 | 2016-11-10 | Method for slag regulation of smelting of vanadium extracting converter |
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| CN106350633A true CN106350633A (en) | 2017-01-25 |
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| CN201610989803.3A Pending CN106350633A (en) | 2016-11-10 | 2016-11-10 | Method for slag regulation of smelting of vanadium extracting converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107058764A (en) * | 2017-04-17 | 2017-08-18 | 攀钢集团研究院有限公司 | A kind of method that vanadium is reclaimed from corundum slag |
| CN108265183A (en) * | 2018-04-16 | 2018-07-10 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN111349797A (en) * | 2020-03-18 | 2020-06-30 | 玉溪新兴钢铁有限公司 | Method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by converter |
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| RU2201467C2 (en) * | 2001-01-22 | 2003-03-27 | Анатолий Матвеевич Новик | Method of production of vanadium-containing ferroalloy |
| CN104032060A (en) * | 2014-06-19 | 2014-09-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for desulfurizing molten iron |
| CN104195283A (en) * | 2014-09-16 | 2014-12-10 | 攀钢集团西昌钢钒有限公司 | Vanadium slag modifier for converter vanadium extraction and converter vanadium extraction smelting method |
| CN104673964A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Modification method for high-silicon-chromium-vanadium slag of converter |
-
2016
- 2016-11-10 CN CN201610989803.3A patent/CN106350633A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2201467C2 (en) * | 2001-01-22 | 2003-03-27 | Анатолий Матвеевич Новик | Method of production of vanadium-containing ferroalloy |
| CN104032060A (en) * | 2014-06-19 | 2014-09-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for desulfurizing molten iron |
| CN104195283A (en) * | 2014-09-16 | 2014-12-10 | 攀钢集团西昌钢钒有限公司 | Vanadium slag modifier for converter vanadium extraction and converter vanadium extraction smelting method |
| CN104673964A (en) * | 2015-03-16 | 2015-06-03 | 攀钢集团研究院有限公司 | Modification method for high-silicon-chromium-vanadium slag of converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107058764A (en) * | 2017-04-17 | 2017-08-18 | 攀钢集团研究院有限公司 | A kind of method that vanadium is reclaimed from corundum slag |
| CN108265183A (en) * | 2018-04-16 | 2018-07-10 | 攀钢集团研究院有限公司 | Converter segmented supplies extraction vanadium method |
| CN111349797A (en) * | 2020-03-18 | 2020-06-30 | 玉溪新兴钢铁有限公司 | Method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by converter |
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Application publication date: 20170125 |