CN113174458A - Comprehensive recovery process of vanadium titano-magnetite - Google Patents
Comprehensive recovery process of vanadium titano-magnetite Download PDFInfo
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- CN113174458A CN113174458A CN202110461217.2A CN202110461217A CN113174458A CN 113174458 A CN113174458 A CN 113174458A CN 202110461217 A CN202110461217 A CN 202110461217A CN 113174458 A CN113174458 A CN 113174458A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
- C01G31/02—Oxides
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
- C21B13/023—Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state
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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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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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
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1218—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by dry processes
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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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to a comprehensive recovery process of vanadium titano-magnetite, which comprises the following steps: the vanadium-titanium magnetite fine powder is subjected to uniform mixing, pelletizing and drying, and then is reduced by a shaft furnace to obtain high-carbon deoxidized pellets, the high-carbon deoxidized pellets are added into a titanium slag furnace to be smelted to obtain titanium slag and vanadium-containing molten iron, and then the vanadium-containing molten iron is added into a vanadium slag furnace to be blown with oxygen and tempered to obtain vanadium slag and molten steel. Compared with the existing vanadium titano-magnetite recovery process in the world, the process has the remarkable advantages of recycling the valuable components of vanadium, titanium and iron in the vanadium titano-magnetite, high yield, low production cost, good product quality, remarkable economic benefit and the like, and can realize the single-system treatment of more than 100 million tons of vanadium titano-magnetite fine powder per year.
Description
Technical Field
The invention relates to the technical field of metal pyrometallurgy, in particular to a comprehensive recovery process of vanadium titano-magnetite.
Background
At present, the pyrometallurgical process aiming at recycling vanadium titano-magnetite comprises the following steps: the three processes of a long process of a blast furnace and a converter, a short process of a rotary kiln and an ore-smelting furnace and a short process of a coal-based direct reduction furnace and an electric furnace have obvious defects.
In the smelting process of the long-flow process of the blast furnace and the converter aiming at the vanadium-titanium magnetite, TiO in the blast furnace slag2The content of (A) cannot be more than 23%, otherwise, the blast furnace cannot normally produce. However, at present, TiO2Less than 23% of the slag is not economically reasonable utilized, so with this process, the TiO in the vanadium titano-magnetite is not available2Almost all the waste is wasted, which makes the titanium slag accumulation of the blast furnace discharged from the blast furnace of the steel plant adopting the process as a mountain difficult problem in the world.
In the smelting process of vanadium-titanium magnetite by the short-flow process of the rotary kiln and the submerged arc furnace, three very obvious defects exist, firstly, the yield of a single submerged arc furnace is very limited, and the single equipment cannot realize the large-scale production of more than 20 ten thousand tons; secondly, the power consumption of the submerged arc furnace is too high, so that the production cost is higher, especially in areas with high power charge; thirdly, vanadium slag V cannot be obtained by adopting the process2O5The economic value of the method is not fully reflected.
In the smelting of vanadium-titanium magnetite, the short-flow process of the coal-based direct reduction furnace and the electric furnace has two obvious defects at present, firstly, the process only needs to be provided with one electric furnace to obtain titanium slag, vanadium slag and molten steel, and the electric furnace can hardly complete the large-scale vanadium-titanium magnetite treatment of more than 50 ten thousand tons every year; and in the oxygen blowing vanadium extraction process, the effect of oxygen blowing vanadium extraction by an electric furnace is poorer than that of vanadium extraction by an oxygen converter, and the energy consumption and the cost are high.
Disclosure of Invention
The invention aims to provide a comprehensive recovery process of vanadium titano-magnetite, which not only has the remarkable advantage of recycling three valuable components of vanadium, titanium and iron in the vanadium titano-magnetite, but also has the remarkable advantages of high yield, low production cost, good product quality, remarkable economic benefit and the like, and can realize the single-system treatment of more than 100 million tons of vanadium titano-magnetite fine powder per year.
In order to achieve the technical effects, the invention adopts the following technical scheme:
a comprehensive recovery process of vanadium titano-magnetite specifically comprises the following steps:
(1) mixing the vanadium titano-magnetite fine powder and a binder uniformly, pelletizing and drying to obtain pellets, and conveying the pellets into a shaft furnace through a conveying device;
(2) deoxidizing the pellets, a reducing agent and a desulfurizing agent in a shaft furnace to obtain high-carbon deoxidized pellets, wherein the reduction temperature in the shaft furnace is 800-1250 ℃, and the reduction time is 8-16 hours;
(3) the high-carbon deoxidized pellets are put into a titanium slag furnace for smelting through hot charging or cold charging, the heat required by smelting is provided by electric energy in the titanium slag furnace, and the smelting time is 45-90 minutes, so that titanium slag and vanadium-containing molten iron are obtained;
(4) and (3) charging vanadium-containing molten iron into a vanadium slag furnace for oxygen blowing and tempering, wherein the oxygen blowing and tempering are carried out in the vanadium slag furnace, and the smelting time is 20-40 minutes, so as to obtain vanadium slag and molten steel.
V in the vanadium titano-magnetite fine powder in the step (1)2O5The content of the TiO is more than or equal to 0.5 percent2The content of the TFe is more than or equal to 8 percent and the TFe is more than or equal to 30 percent.
The shaft furnace in the step (1) is a coal-based shaft furnace or a double-base shaft furnace combining a coal base and a gas base.
The carbon content of the high-carbon deoxidized pellets in the step (2) is 1.5-3.0%.
And (4) the titanium slag furnace in the step (3) is an electric arc furnace or an intermediate frequency furnace.
And (4) the vanadium slag furnace in the step (4) is a converter or an electric arc furnace.
The implementation of the invention has the following beneficial effects:
1) the invention can treat vanadium titano-magnetite with different contents: v in vanadium titano-magnetite fine powder2O5The content of the TiO is more than or equal to 0.5 percent2The content of the TFe is more than or equal to 8 percent and the TFe is more than or equal to 30 percent can be recycled by adopting the process;
2) the invention can well realize large-scale production: the invention adopts a coal-based shaft furnace or a double-base shaft furnace combining coal base and gas base to produce the deoxidized pellets and adopts the independent production operation of the titanium slag furnace and the vanadium slag furnace, thus realizing that a single system can process more than 100 ten thousand tons of vanadium-titanium magnetite fine powder every year;
3) the invention can well realize the recovery of three components of vanadium, titanium and iron: the invention can finally process the vanadium titano-magnetite to obtain V2O5Vanadium slag and TiO with content of more than 10 percent2Titanium slag with the content of more than 45 percent and molten steel with qualified components;
4) the invention can realize high comprehensive yield: after the treatment of the shaft furnace, the titanium slag furnace and the vanadium slag furnace, the total V is2O5The yield reaches 80-90 percent, and TiO2The yield is 95-100%, and the TFe yield is 85-90%;
5) the invention has remarkable economic benefit: the process has obvious economic benefit because the three components of vanadium, titanium and iron can be well recycled.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
In order to make the technical scheme of the invention easier to understand, the technical scheme of the invention is clearly and completely described by adopting a mode of a specific embodiment in combination with the attached drawings. It should be noted that the embodiments described herein are only some embodiments of the present invention, and not all implementations of the present invention, and the embodiments are only examples, which only serve to provide examiners and the public with a more intuitive and clear understanding of the present invention, and do not limit the technical solutions of the present invention. All other embodiments, as well as other simple substitutions and various changes to the technical solutions of the present invention, which can be made by those skilled in the art without inventive work, are within the scope of the present invention without departing from the spirit of the present invention.
Examples
As shown in figure 1, the invention provides a comprehensive recovery process of vanadium titano-magnetite, which mainly comprises the following production steps:
1) v in vanadium titano-magnetite fine powder2O5Content of (2) is 0.6%, TiO2The content of the vanadium titano-magnetite is about 12.5 percent, the content of TFe is about 55 percent, and 100 ten thousand tons of vanadium titano-magnetite fine powder is processed every year;
2) uniformly mixing the vanadium titano-magnetite fine powder and the organic binder according to the proportion of 1:0.02, carrying out ball pressing on a double-roller ball press, and then drying to obtain pellets;
3) loading the dried pellets, semi-coke (or anthracite or coke particles) and limestone into a coal-based shaft furnace according to the proportion of 1:0.45:0.05, wherein the reduction temperature in the shaft furnace is 1100 ℃, the reduction time is 12 hours, and obtaining deoxidized pellets with the carbon content of about 2 percent and the metallization rate of more than or equal to 90 percent through reduction and deoxidation;
4) adding the cold deoxidized pellets into an electric arc furnace for smelting for 90 minutes to obtain TiO2Titanium slag with 55-60% of content and V with purity of more than 99.5%2O5The industrial pure molten iron of (1);
5) will contain V2O5Charging the industrial pure molten iron into a converter for oxygen blowing and tempering, oxygen blowing and tempering in the converter, and smelting for 30 minutes to obtain V2O530-50% of vanadium slag and qualified molten steel.
6) Three products are finally obtained each year: TiO2222 ten thousand tons of titanium slag and V with the content of 55-60 percent2O51.6 million tons of vanadium slag with the content of 30-50 percent and about 47 million tons of qualified molten steel, and the three products can be well utilized in the subsequent working procedures, thereby fully reflecting the good economic values of the three components.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. The comprehensive recovery process of vanadium titano-magnetite is characterized by comprising the following steps:
(1) mixing the vanadium titano-magnetite fine powder and a binder uniformly, pelletizing and drying to obtain pellets, and conveying the pellets into a shaft furnace through a conveying device;
(2) deoxidizing the pellets, a reducing agent and a desulfurizing agent in a shaft furnace to obtain high-carbon deoxidized pellets, wherein the reduction temperature in the shaft furnace is 800-1250 ℃, and the reduction time is 8-16 hours;
(3) the high-carbon deoxidized pellets are put into a titanium slag furnace for smelting through hot charging or cold charging, the heat required by smelting is provided by electric energy in the titanium slag furnace, and the smelting time is 45-90 minutes, so that titanium slag and vanadium-containing molten iron are obtained;
(4) and (3) charging vanadium-containing molten iron into a vanadium slag furnace for oxygen blowing and tempering, wherein the oxygen blowing and tempering are carried out in the vanadium slag furnace, and the smelting time is 20-40 minutes, so as to obtain vanadium slag and molten steel.
2. The comprehensive recovery process of vanadium titano-magnetite as claimed in claim 1, characterized in that the content of V2O5 in the vanadium titano-magnetite concentrate powder in step (1) is not less than 0.5%, the content of TiO2 is not less than 8%, and TFe is not less than 30%.
3. The integrated recovery process of vanadium titano-magnetite as claimed in claim 1, wherein the shaft furnace in step (1) is a coal-based shaft furnace or a coal-based and gas-based combined double-base shaft furnace.
4. The integrated recovery process of vanadium titano-magnetite as claimed in claim 1, wherein the carbon content of the high carbon deoxidized pellets in step (2) is 1.5-3.0%.
5. The integrated recovery process of vanadium titano-magnetite according to claim 1, characterized in that the titanium slag furnace in step (3) is an electric arc furnace or an intermediate frequency furnace.
6. The integrated recovery process of vanadium titano-magnetite according to claim 1, characterized in that the vanadium slag furnace in step (4) is a converter or an electric arc furnace.
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| CN202110461217.2A CN113174458A (en) | 2021-04-27 | 2021-04-27 | Comprehensive recovery process of vanadium titano-magnetite |
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| CN202110461217.2A CN113174458A (en) | 2021-04-27 | 2021-04-27 | Comprehensive recovery process of vanadium titano-magnetite |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131927C1 (en) * | 1998-02-20 | 1999-06-20 | Открытое акционерное общество "Нижнетагильский металлургический комбинат" | Method of pyrometallurgical processing of vanadium-containing and iron-ore materials |
| CN106755687A (en) * | 2016-11-24 | 2017-05-31 | 武汉科思瑞迪科技有限公司 | A kind of based shaft kiln directly reduced technique of coal |
| CN110484673A (en) * | 2019-09-11 | 2019-11-22 | 中南大学 | A kind of prereduction-electric furnace depth reduction-sulfuric acid process comprehensive utilization of V-Ti magnetite technique |
| CN110564956A (en) * | 2019-07-19 | 2019-12-13 | 陕西有色冶金矿业集团有限公司 | Smelting system for separating and enriching vanadium and producing pure iron from iron ore concentrate |
| CN111100984A (en) * | 2019-06-05 | 2020-05-05 | 武汉科思瑞迪科技有限公司 | Titanium slag treatment method |
-
2021
- 2021-04-27 CN CN202110461217.2A patent/CN113174458A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131927C1 (en) * | 1998-02-20 | 1999-06-20 | Открытое акционерное общество "Нижнетагильский металлургический комбинат" | Method of pyrometallurgical processing of vanadium-containing and iron-ore materials |
| CN106755687A (en) * | 2016-11-24 | 2017-05-31 | 武汉科思瑞迪科技有限公司 | A kind of based shaft kiln directly reduced technique of coal |
| CN111100984A (en) * | 2019-06-05 | 2020-05-05 | 武汉科思瑞迪科技有限公司 | Titanium slag treatment method |
| CN110564956A (en) * | 2019-07-19 | 2019-12-13 | 陕西有色冶金矿业集团有限公司 | Smelting system for separating and enriching vanadium and producing pure iron from iron ore concentrate |
| CN110484673A (en) * | 2019-09-11 | 2019-11-22 | 中南大学 | A kind of prereduction-electric furnace depth reduction-sulfuric acid process comprehensive utilization of V-Ti magnetite technique |
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Application publication date: 20210727 |