CN107904349A - A kind of top and bottom combined blown converter extraction vanadium method - Google Patents
A kind of top and bottom combined blown converter extraction vanadium method Download PDFInfo
- Publication number
- CN107904349A CN107904349A CN201711223813.7A CN201711223813A CN107904349A CN 107904349 A CN107904349 A CN 107904349A CN 201711223813 A CN201711223813 A CN 201711223813A CN 107904349 A CN107904349 A CN 107904349A
- Authority
- CN
- China
- Prior art keywords
- blowing
- vanadium
- blown converter
- combined blown
- oxygen supply
- 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
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
-
- 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
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- 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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a kind of top and bottom combined blown converter extraction vanadium method, including step：Oxygen supply blowing and bottom blowing are carried out to vanadium-bearing hot metal, wherein, bottom blowing uses CO gas；By the above method, the storeroom in converter can be caused to be full of carbon monoxide, so as to reduce the oxidation reaction of the carbon in molten iron, reduce heat release, so as to fulfill the dosage of vanadium-raising cooling agent, the purpose of reduced cost is reduced.
Description
Technical field
The present invention relates to technical field of smelting, more particularly to a kind of top and bottom combined blown converter extraction vanadium method.
Background technology
China is vanadium titano-magnetite big country, and climbing steel, Cheng Gang, elder brother's steel, Wei Gangdeng enterprises is carried out using vanadium titano-magnetite
To smelt, the molten iron that vanadium titano-magnetite blast furnace process goes out content of vanadium compared with common molten iron is high, and vanadium is a kind of important resource, because
Necessary vanadium extraction, produces vanadium slag before this molten iron-steelmaking.At present, it is more that the production method of vanadium slag is produced both at home and abroad, mainly there is New Zealand
Ladle blows vanadium technique, South Africa shaking ladle process for extracting vanadium, Russia and vanadium extraction by converter blowing technique of China etc., and other process for extracting vanadium also wrap
V-bearing steel slag vanadium extraction, process for extracting vanadium from stone coal etc. are included, wherein optimal with vanadium extraction by converter blowing technique, technical-economic index is best.
Converter Oxigen Blowing vanadium extraction is an exothermic process,【Si】、【Mn】、【V】、【C】Molten bath is set to be rapidly heated Deng element oxide,
And【Si】、【Mn】Oxidation occurs【V】Before oxidation, vanadium extraction can not possibly suppress its reaction, and【C】、【V】Conversion temperature about exists
1365 DEG C or so, therefore to obtain【V】High oxidation rate and【V】Yield, it is necessary to add vanadium-raising cooling agent, control bath temperature makes
Approach【C】、【V】Conversion temperature, achievees the purpose that carbon is protected in vanadium extraction, will【V】It is down to less than 0.05%.The terminal half steel temperature of vanadium extraction
Degree is unsuitable excessive, aoxidized with vanadium vanadium extracting process early period based on, based on the later stage reduced with vanadium, but it is based on vanadium reduction to blow vanadium process.
So making molten iron temperature drop to suitable scope using addition cooling agent in cooling, pass through duration of blast in converter smelting
With the control of process temperature, the vanadium in half steel is aoxidized, improves recovery rate, therefore, the production work of current vanadium extraction by converter blowing both at home and abroad
The improvement of skill is realized generally by the mode of adjustment cooling agent, process temperature and duration of blast, but above-mentioned converter is blown
Oxygen extraction vanadium method needs to add substantial amounts of vanadium-raising cooling agent, and vanadium extraction cost is higher.
Therefore, top and bottom combined blown converter extraction vanadium method how is improved, to reduce the dosage of vanadium-raising cooling agent, reduced cost, into
For those skilled in the art's important technological problems urgently to be resolved hurrily.
The content of the invention
In view of this, it is an object of the invention to provide a kind of top and bottom combined blown converter extraction vanadium method, to reduce vanadium extraction cooling
The dosage of agent, reduced cost.
To achieve the above object, the present invention provides following technical solution：
A kind of top and bottom combined blown converter extraction vanadium method, including step：Oxygen supply blowing and bottom blowing, the bottom are carried out to vanadium-bearing hot metal
Blow and use CO gas.
Preferably, before the oxygen supply blowing starts, nitrogen bottom blowing is carried out.
Preferably, 1~1.5min before the oxygen supply blowing starts, CO gas bottom is switched to by nitrogen bottom blowing
Blow.
Preferably, 1~1.5min before the oxygen supply finishing blowing, nitrogen bottom is switched to by CO gas bottom blowing
Blow.
Preferably, the air flow rate of the nitrogen bottom blowing is no more than 200Nm3/h。
Preferably, the air flow rate of the carbon monoxide bottom blowing is 1500~2000Nm3/h。
Preferably, 2min adds vanadium-raising cooling agent before oxygen supply blowing and bottom blowing are carried out to vanadium-bearing hot metal.
Preferably, the addition of the vanadium-raising cooling agent is no more than 25kg/t.Fe.
Preferably, bottom blown gas enters through furnace bottom air brick.
Top and bottom combined blown converter extraction vanadium method provided by the invention, including step：Oxygen supply blowing and bottom are carried out to vanadium-bearing hot metal
Blow, wherein, bottom blowing uses CO gas；By the above method, the storeroom in converter can be caused to be full of carbon monoxide,
So as to reduce the oxidation reaction of the carbon in molten iron, heat release is reduced, so as to fulfill the dosage of vanadium-raising cooling agent is reduced, is reduced into
This purpose.
Embodiment
It is an object of the invention to provide a kind of top and bottom combined blown converter extraction vanadium method, which can
To reduce the dosage of vanadium-raising cooling agent, reduced cost.
A kind of top and bottom combined blown converter extraction vanadium method provided in an embodiment of the present invention, including step：Vanadium-bearing hot metal is supplied
Oxygen blows and bottom blowing, wherein, bottom blowing uses CO gas.
Compared with prior art, top and bottom combined blown converter extraction vanadium method provided by the invention, can cause the material in converter
Between be full of carbon monoxide, so as to reduce the oxidation reaction of the carbon in molten iron, heat release is reduced, so as to fulfill vanadium extraction cooling is reduced
The dosage of agent, the purpose of reduced cost.
In the non-blowing stage before oxygen supply blowing starts, do not use carbon monoxide to carry out bottom blowing, and make to carry out using nitrogen
Bottom blowing.
Further optimize above-mentioned technical proposal, to guarantee when oxygen supply blowing starts, the storeroom in converter is
Full of carbon monoxide, achieve the purpose that the oxidation reaction for fully suppressing the carbon in molten iron, at top bottom provided in an embodiment of the present invention
In combined blown converter extraction vanadium method, 1~1.5min enters the blowing preparation stage before oxygen supply blowing starts, in this stage, by nitrogen
Gas bottom blowing is switched to CO gas bottom blowing, so that carbon monoxide can be made to be full of material gap when oxygen blowing starts.
Further, in embodiments of the present invention, 1~1.5min before finishing blowing is supplied oxygen, by CO gas
Bottom blowing is switched to nitrogen bottom blowing, starts to the oxygen supply blowing of next stove.
In the embodiment of the present invention, in the non-blowing stage, the air flow rate of nitrogen bottom blowing is no more than 200Nm3/h.And supplying oxygen
In the blowing stage, the air flow rate of carbon monoxide bottom blowing is 1500~2000Nm3/h。
To ensure that vanadium-raising cooling agent can play a role in time, in embodiments of the present invention, supplied to vanadium-bearing hot metal
Oxygen blows and adds vanadium-raising cooling agent with 2min before bottom blowing, and is no more than depending on the addition of molten iron temperature control vanadium-raising cooling agent
25kg/t.Fe。
Further optimize above-mentioned technical proposal, in embodiments of the present invention, bottom blown gas enters through furnace bottom air brick.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (9)
1. a kind of top and bottom combined blown converter extraction vanadium method, including step：Oxygen supply blowing is carried out to vanadium-bearing hot metal and bottom blowing, its feature exist
In the bottom blowing uses CO gas.
2. top and bottom combined blown converter extraction vanadium method according to claim 1, it is characterised in that start in the oxygen supply blowing
Before, carry out nitrogen bottom blowing.
3. top and bottom combined blown converter extraction vanadium method according to claim 2, it is characterised in that before the oxygen supply blowing starts
1~1.5min, CO gas bottom blowing is switched to by nitrogen bottom blowing.
4. top and bottom combined blown converter extraction vanadium method according to claim 3, it is characterised in that before the oxygen supply finishing blowing
1~1.5min, nitrogen bottom blowing is switched to by CO gas bottom blowing.
5. according to the top and bottom combined blown converter extraction vanadium method described in claim 2-4 any one, it is characterised in that the nitrogen bottom
The air flow rate blown is no more than 200Nm3/h。
6. according to the top and bottom combined blown converter extraction vanadium method described in claim 2-4 any one, it is characterised in that an oxidation
The air flow rate of carbon bottom blowing is 1500~2000Nm3/h。
7. according to the top and bottom combined blown converter extraction vanadium method described in claim 1-4 any one, it is characterised in that to containing vanadium iron
2min adds vanadium-raising cooling agent before water carries out oxygen supply blowing and bottom blowing.
8. top and bottom combined blown converter extraction vanadium method according to claim 7, it is characterised in that the addition of the vanadium-raising cooling agent
Amount is no more than 25kg/t.Fe.
9. according to the top and bottom combined blown converter extraction vanadium method described in claim 1-4 and 8 any one, it is characterised in that Bottom Blowing
Body enters through furnace bottom air brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711223813.7A CN107904349A (en) | 2017-11-29 | 2017-11-29 | A kind of top and bottom combined blown converter extraction vanadium method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711223813.7A CN107904349A (en) | 2017-11-29 | 2017-11-29 | A kind of top and bottom combined blown converter extraction vanadium method |
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| Publication Number | Publication Date |
|---|---|
| CN107904349A true CN107904349A (en) | 2018-04-13 |
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| CN201711223813.7A Pending CN107904349A (en) | 2017-11-29 | 2017-11-29 | A kind of top and bottom combined blown converter extraction vanadium method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334639A (en) * | 2020-04-14 | 2020-06-26 | 西安建筑科技大学 | Method for promoting vanadium extraction and carbon conservation by using CO |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966393A (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 |
| CN103966392A (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 |
| CN104862442A (en) * | 2015-04-28 | 2015-08-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium through combined blown converter |
-
2017
- 2017-11-29 CN CN201711223813.7A patent/CN107904349A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966393A (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 |
| CN103966392A (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 |
| CN104862442A (en) * | 2015-04-28 | 2015-08-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium through combined blown converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334639A (en) * | 2020-04-14 | 2020-06-26 | 西安建筑科技大学 | Method for promoting vanadium extraction and carbon conservation by using CO |
| CN111334639B (en) * | 2020-04-14 | 2021-11-23 | 西安建筑科技大学 | Method for promoting vanadium extraction and carbon conservation by using CO |
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Application publication date: 20180413 |
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