CN110699554A - Method for producing vanadium-rich iron from vanadium-rich slag - Google Patents
Method for producing vanadium-rich iron from vanadium-rich slag Download PDFInfo
- Publication number
- CN110699554A CN110699554A CN201910984641.8A CN201910984641A CN110699554A CN 110699554 A CN110699554 A CN 110699554A CN 201910984641 A CN201910984641 A CN 201910984641A CN 110699554 A CN110699554 A CN 110699554A
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- Prior art keywords
- vanadium
- rich
- rich slag
- reducing agent
- slag
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Classifications
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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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
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the technical field of metallurgy, and relates to a method for producing vanadium-rich iron from vanadium-rich slag, which comprises the following steps: preparing materials: uniformly mixing the vanadium-rich slag and a reducing agent in proportion; reduction: reducing the vanadium-rich slag by using temperature and a reducing agent to obtain a reduction product; cooling a product: cooling and crushing the reduction product; magnetic separation: and magnetically separating the crushed reduction product to obtain vanadium-rich iron and tailings. The vanadium-rich slag is directly prepared into the vanadium-rich iron without vanadium flakes, the process flow is short, the loss of vanadium in a long-flow process is reduced, and vanadium resources in the vanadium-rich slag can be fully recovered; the process does not generate waste acid and waste water, and has less environmental pollution; in addition, the method can adopt the thermal vanadium-rich slag, fully utilizes the physical heat of the vanadium slag and has low energy consumption.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a method for producing vanadium-rich iron from vanadium-rich slag.
Background
In the traditional method for preparing ferrovanadium from vanadium slag, firstly, vanadium flakes are prepared from the vanadium slag, and then vanadium and titanium are produced from the vanadium flakes. The preparation of the vanadium flake from the vanadium slag adopts a hydrometallurgical process flow, and specifically comprises a sodium roasting-water leaching vanadium-ammonium salt vanadium precipitation flow and a calcification roasting-acid leaching vanadium extraction flow. The production of ferrovanadium from vanadium flakes adopts a pyrometallurgical process flow, which is divided into a silicothermic process and an aluminothermic process flow according to the requirements of ferrovanadium products, and ferrosilicon/aluminum particles are added as a reducing agent to carry out ferrovanadium smelting in an electric furnace by taking vanadium flakes and iron particles as raw materials.
The sodium treatment roasting process is mainly characterized in that:
(1) the vanadium conversion rate and the recovery rate are high in the sodium roasting-water leaching vanadium-ammonium salt vanadium precipitation process;
(2) the process can be used for extracting vanadium, and the product quality is good;
(3) discharge a large amount of harmful gas Cl2HCl and the like, corrode equipment and pollute the environment;
(4) high quality requirement on vanadium-rich materials, CaO and SiO in vanadium slag2The vanadium recovery rate is significantly influenced by the components.
(5) The waste water and waste residue after vanadium extraction are not easy to be treated, the chromium and ammonium content in the waste water is high, the alkali metal content in the waste residue is high, and the comprehensive utilization is difficult.
(6) The addition of sodium salt easily causes furnace burden agglomeration, and influences the smooth operation of production.
The main characteristics of the calcification roasting process flow are as follows:
(1) CaO and SiO can be utilized in the extraction of vanadium by a calcification roasting-acid leaching method2Extracting vanadium from vanadium slag with higher impurity content;
(2) no waste gas is generated in the process, and the roasting process is clean and efficient;
(3) sodium salt and potassium salt are not used in the process, the vanadium extraction tailings can be comprehensively utilized, and the vanadium precipitation mother liquor can be recycled;
(4) the acid leaching vanadium-containing filtrate has high impurity content.
In conclusion, the traditional method for preparing ferrovanadium from vanadium slag has long and complicated process, namely preparing the vanadium slag into vanadium flakes and then producing ferrovanadium. Through a plurality of process flows, the comprehensive recovery rate of vanadium is not high; in addition, the process of producing vanadium flake by hydrometallurgy can produce a large amount of waste acid and waste water, and has great pollution to the environment.
Disclosure of Invention
In view of the above, the invention aims to provide a method for producing ferrovanadium-rich slag from vanadium-rich slag, which has the advantages of short process flow, simple process, capability of fully recovering vanadium resources in the vanadium-rich slag and high metal yield; the heat of the vanadium-rich slag is fully utilized, the energy consumption is low, and the energy conservation and environmental protection are realized.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for producing vanadium-rich iron from vanadium-rich slag comprises the following steps: preparing materials: uniformly mixing the vanadium-rich slag and a reducing agent in proportion; reduction: reducing the vanadium-rich slag by using temperature and a reducing agent to obtain a reduction product; cooling a product: cooling and crushing the reduction product; magnetic separation: and magnetically separating the crushed reduction product to obtain vanadium-rich iron and tailings.
Optionally, V in the vanadium-rich slag2O53-8% of T.Fe, 15-35% of the rest is SiO2、Al2O3、MgO、CaO、TiO2。
Optionally, the reducing agent is a carbonaceous reducing agent or an aluminous reducing agent or a siliceous reducing agent.
Optionally, the carbonaceous reductant has a fixed carbon content of not less than 85%.
Optionally, the aluminum content of the aluminum reducing agent is not less than 99%.
Optionally, the siliceous reducing agent has a silicon content of not less than 60%.
Optionally, in the step of "batching", the proportion of the reducing agent is 4-10% of the weight of the raw materials entering the furnace.
Alternatively, in step "reduction", the reduction temperature is 1450 ℃ to 1650 ℃.
Optionally, in the step of reducing, the reducing time is 1-7 h.
Optionally, the vanadium-rich slag is in a hot or cold state.
Optionally, the temperature of the hot vanadium-rich slag is 1450-1550 ℃.
The invention has the beneficial effects that:
the method comprises the steps of taking vanadium-rich slag as a raw material, uniformly mixing the vanadium-rich slag and a reducing agent in proportion, adding a high-temperature reduction process, and deeply reducing the vanadium-rich slag by the reducing agent at the high temperature of 1450-1650 ℃ to obtain a reduced product; then the reduction product is naturally cooled and then crushed. And finally, entering a magnetic separation process, and separating the crushed reduction product by using a magnetic separation device to obtain vanadium-rich iron and tailings. The vanadium-rich slag is directly prepared into the vanadium-rich iron without vanadium flakes, the process flow is short, the loss of vanadium in a long-flow process is reduced, and vanadium resources in the vanadium-rich slag can be fully recovered; the process does not generate waste acid and waste water, and has less environmental pollution; in addition, the method can adopt the thermal vanadium-rich slag, fully utilizes the physical heat of the vanadium slag and has low energy consumption.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1, fig. 1 is a schematic process flow diagram of the present invention. As shown in the figure, the vanadium-rich slag and the reducing agent are uniformly mixed in the batching procedure according to the proportion (when the adding amount of the carbonaceous reducing agent is 5 percent of the weight of the vanadium-rich slag); then adding a high-temperature reduction process, heating to the reduction temperature of 1450-1650 ℃, controlling the reduction time to be about 3h, and fully reducing the vanadium-rich slag to obtain a reduction product; in the product cooling process, the reduction product is naturally cooled and crushed; and then entering a magnetic separation process, and carrying out magnetic separation by adopting a magnetic separation device to obtain vanadium-rich iron with the V content of about 16% and tailings. The rich ferrovanadium can be used as an alloy additive for steelmaking, and the tailings are not used.
In a specific operation step, V in the vanadium-rich slag2O53-8%, T.Fe content in slag 15-35%, and SiO in balance2、Al2O3、MgO、CaO、TiO2And the like. The vanadium-rich slag can be in a cold state or a hot state. The temperature of the thermal vanadium-rich slag is 1450-1550 ℃. The reducing agent can be a carbonaceous reducing agent, an aluminum reducing agent or a siliceous reducing agent. The fixed carbon content of the carbonaceous reducing agent is not less than 85%. The aluminum content of the aluminum reducing agent is not less than 99%. The silicon content of the siliceous reducing agent is not less than 60 percent. The proportion of the reducing agent in the burdening process is 4-10% of the weight of the raw materials entering the furnace. The reduction device used in the high-temperature reduction process can be an induction furnace, an electric arc furnace and the like. The reduction temperature of the high-temperature reduction process is controlled to be 1450-1650 ℃. The reduction time of the high-temperature reduction process is 1-7 h. The content of V in the ferrovanadium-rich material is 10-18%, the balance is mostly Fe, and other impurity elements such as C, Si, Mn, P, S and the like are trace. The main components of the tailings comprise CaO, MgO and Al2O3、TiO2And the like.
The method comprises the steps of taking vanadium-rich slag as a raw material, uniformly mixing the vanadium-rich slag and a reducing agent in proportion, adding a high-temperature reduction process, and deeply reducing the vanadium-rich slag by the reducing agent at the high temperature of 1450-1650 ℃ to obtain a reduced product; then the reduction product is naturally cooled and then crushed. And finally, entering a magnetic separation process, and separating the crushed reduction product by using a magnetic separation device to obtain vanadium-rich iron and tailings. The vanadium-rich slag is directly prepared into the vanadium-rich iron without vanadium flakes, the process flow is short, the loss of vanadium in a long-flow process is reduced, and vanadium resources in the vanadium-rich slag can be fully recovered; the process does not generate waste acid and waste water, and has less environmental pollution; in addition, the method can adopt the thermal vanadium-rich slag, fully utilizes the physical heat of the vanadium slag and has low energy consumption.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The method for producing the vanadium-rich iron from the vanadium-rich slag is characterized by comprising the following steps:
preparing materials: uniformly mixing the vanadium-rich slag and a reducing agent in proportion;
reduction: reducing the vanadium-rich slag by using temperature and a reducing agent to obtain a reduction product;
cooling a product: cooling and crushing the reduction product;
magnetic separation: and magnetically separating the crushed reduction product to obtain vanadium-rich iron and tailings.
2. The method for producing ferrovanadium-rich slag according to claim 1, wherein V in the vanadium-rich slag is2O53-8% of T.Fe, 15-35% of the rest is SiO2、Al2O3、MgO、CaO、TiO2。
3. The method for producing ferrovanadium-rich slag according to claim 1, wherein the reducing agent is a carbonaceous reducing agent or an aluminum reducing agent or a siliceous reducing agent.
4. The method for producing ferrovanadium-rich slag according to claim 3, wherein the carbonaceous reducing agent has a fixed carbon content of not less than 85%.
5. The method for producing ferrovanadium-rich slag as claimed in claim 3, wherein the aluminum content of the aluminum reducing agent is not less than 99%.
6. The method for producing ferrovanadium-rich slag according to claim 3, wherein the siliceous reducing agent has a silicon content of not less than 60%.
7. The method for producing ferrovanadium-rich slag according to claim 1, wherein in the step of "blending", the proportion of the reducing agent is 4-10% of the weight of the raw materials charged into the furnace.
8. The method for producing ferrovanadium-rich slag according to claim 1, wherein in the step "reduction", the reduction temperature is 1450 ℃ to 1650 ℃.
9. The method for producing ferrovanadium-rich slag according to claim 1, wherein the vanadium-rich slag is in a hot state or a cold state.
10. The method for producing ferrovanadium-rich slag according to claim 9, wherein the hot vanadium-rich slag temperature is 1450 ℃ to 1550 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910984641.8A CN110699554A (en) | 2019-10-16 | 2019-10-16 | Method for producing vanadium-rich iron from vanadium-rich slag |
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| CN201910984641.8A CN110699554A (en) | 2019-10-16 | 2019-10-16 | Method for producing vanadium-rich iron from vanadium-rich slag |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197141A (en) * | 2020-02-21 | 2020-05-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Control method for fine powder rate of FeV50 alloy |
| CN111235389A (en) * | 2020-03-30 | 2020-06-05 | 中国恩菲工程技术有限公司 | Smelting method and device of vanadium titano-magnetite |
| CN111748694A (en) * | 2020-06-28 | 2020-10-09 | 中冶赛迪工程技术股份有限公司 | Method for enriching and recovering vanadium resource in vanadium-rich slag |
| CN112359231A (en) * | 2020-10-27 | 2021-02-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium by directly calcifying hot vanadium slag |
| CN112458298A (en) * | 2020-10-27 | 2021-03-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium by direct sodium treatment of thermal vanadium slag |
| CN113621864A (en) * | 2021-08-25 | 2021-11-09 | 张计辉 | Method for directly smelting nitrided ferrovanadium or ferrovanadium from high-temperature vanadium slag without chemical process |
| CN113957329A (en) * | 2021-10-21 | 2022-01-21 | 矿冶科技集团有限公司 | Method for directly smelting ferrovanadium from vanadium slag and application |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197141A (en) * | 2020-02-21 | 2020-05-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Control method for fine powder rate of FeV50 alloy |
| CN111197141B (en) * | 2020-02-21 | 2021-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Control method for fine powder rate of FeV50 alloy |
| CN111235389A (en) * | 2020-03-30 | 2020-06-05 | 中国恩菲工程技术有限公司 | Smelting method and device of vanadium titano-magnetite |
| CN111235389B (en) * | 2020-03-30 | 2024-01-23 | 中国恩菲工程技术有限公司 | Smelting method and device of vanadium titano-magnetite |
| CN111748694A (en) * | 2020-06-28 | 2020-10-09 | 中冶赛迪工程技术股份有限公司 | Method for enriching and recovering vanadium resource in vanadium-rich slag |
| CN112359231A (en) * | 2020-10-27 | 2021-02-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium by directly calcifying hot vanadium slag |
| CN112458298A (en) * | 2020-10-27 | 2021-03-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium by direct sodium treatment of thermal vanadium slag |
| CN113621864A (en) * | 2021-08-25 | 2021-11-09 | 张计辉 | Method for directly smelting nitrided ferrovanadium or ferrovanadium from high-temperature vanadium slag without chemical process |
| CN113621864B (en) * | 2021-08-25 | 2022-06-24 | 张计辉 | Method for directly smelting nitrided ferrovanadium or ferrovanadium from high-temperature vanadium slag without chemical process |
| CN113957329A (en) * | 2021-10-21 | 2022-01-21 | 矿冶科技集团有限公司 | Method for directly smelting ferrovanadium from vanadium slag and application |
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