CN106987731A

CN106987731A - The system and method for extracting vanadium from stone coal

Info

Publication number: CN106987731A
Application number: CN201710179452.4A
Authority: CN
Inventors: 邓君; 薛逊; 曹志成; 冯鲁兴; 唐敬坤; 韩志彪; 吴道洪
Original assignee: Jiangsu Province Metallurgical Design Institute Co Ltd
Current assignee: Jiangsu Province Metallurgical Design Institute Co Ltd
Priority date: 2017-03-23
Filing date: 2017-03-23
Publication date: 2017-07-28

Abstract

The invention discloses the system and method for extracting vanadium from stone coal, the system includes：Bone coal crushing and grinding apparatus, with bone coal entrance and bone coal particle outlet；Iron ore concentrate crushing and grinding apparatus, with iron ore concentrate entrance and iron ore concentrate particle outlet；Slag former crushing and grinding apparatus, with slag former entrance and slag former particle outlet；Mixing arrangement, with the outlet of bone coal particle entrance, iron ore concentrate particle entrance, slag former particle entrance, binding agent entrance, water inlet and mixed material；Shaped device, is exported with mixed material entrance and molding materials；Drying device, with the outlet of molding materials entrance, water out and dried material；Reduction apparatus, with the outlet of dried material entrance, high-temperature flue gas outlet and reducing material；Molten separating device, with reducing material entrance, carbonaceous material entrance, vanadium-bearing hot metal outlet and slag outlet；Vanadium extraction device, with vanadium-bearing hot metal entrance, oxygen intake, half steel outlet and vanadium slag outlet；Vanadium slag processing unit, is exported with vanadium slag entrance and vanadic anhydride.

Description

The system and method for extracting vanadium from stone coal

Technical field

The invention belongs to field of metallurgy, specifically, the present invention relates to the system and method for extracting vanadium from stone coal.

Background technology

Bone coal be it is a kind of it is carbon containing less, the low lambskin of calorific capacity, be a kind of low-grade many metal mineral intergrowths, bone coal again The accompanying element being had found in resource kind up to more than 60, wherein can be formed industrial mineral deposit mainly vanadium, next to that molybdenum, uranium, phosphorus, Silver etc..The bone coal resource of China is enriched very much, and total reserves rank first in the world.China is since 1960s to stone Coal vanadium extraction is studied, and starts industrial production the seventies, and used technique is broadly divided into two big process routes, i.e. pyrogenic process and is calcined Wet method process for extracting vanadium and Whote-wet method process for extracting vanadium.Thermal process sodium roasting-water logging or acid leaching process are sodium roasting (NaCl)-water logging or acid leaching process.There are two major defects in this technique, one is to obtain higher V₂O₅Leaching rate, it has to Consume a large amount of H₂SO₄, H in production₂SO₄Consumption is generally the 25%~40% of ore quality, and vanadium recovery is commonly 45%- 55%, making 50% or so navajoite resource cannot effectively utilize and waste；Two be the purification and impurity removal of acid leaching solution, Fe (III) reduction and pH value adjustment etc. process need to consume a large amount of medicaments, particularly ammoniacal liquor so that cause ammonia nitrogen waste water generation and Process problem.Although climb steel achieves breakthrough in extracting vanadium from stone coal technology, significantly larger than domestic pharmaceutical industry industry common 40%~ 50% index, the total recovery of vanadium averagely reaches 60.70%, and the vanadium resource for still having 40% is wasted.Whote-wet method process for extracting vanadium be by Bone coal acidleach in the presence of normal pressure or temperature-pressure and oxidant, extraction, ion exchange are utilized by what acidleach was obtained containing vanadium solution Vanadium extraction is carried out etc. technique, because content of vanadium is low in bone coal, treating capacity is big so that acid consumption is big, pollutant emission is high, vanadium production into This height.

Therefore the technology of existing extracting vanadium from stone coal is further improved.

The content of the invention

It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, the present invention One purpose is to propose a kind of system and method for extracting vanadium from stone coal, and the system makees reducing agent reduced iron concentrate and bone coal with bone coal In ferriferous oxide, barium oxide to produce half steel and vanadium extraction, can be with the carbon in comprehensive reutilization bone coal, vanadium and iron so that The content of vanadic anhydride is more than 10 times of bone coal in vanadium slag, and the sulfur content in vanadium-bearing hot metal is down to from more than 2.5wt% 0.1wt%, compared to prior art, obtains the alkaline consumption reduction by more than 70% of equivalent vanadic anhydride, energy consumption reduction from bone coal More than 12%.

In the invention of the present invention, the present invention proposes a kind of system of extracting vanadium from stone coal.Embodiments in accordance with the present invention, The system includes：

Bone coal crushing and grinding apparatus, the bone coal crushing and grinding apparatus has bone coal entrance and bone coal particle outlet；

Iron ore concentrate crushing and grinding apparatus, the iron ore concentrate crushing and grinding apparatus has iron ore concentrate entrance and iron ore concentrate particle outlet；

Slag former crushing and grinding apparatus, the slag former crushing and grinding apparatus has slag former entrance and slag former particle outlet；

Mixing arrangement, the mixing arrangement have bone coal particle entrance, iron ore concentrate particle entrance, slag former particle entrance, Binding agent entrance, water inlet and mixed material outlet, the bone coal particle entrance are connected with the bone coal particle outlet, the iron Concentrate particle entrance is connected with the iron ore concentrate particle outlet, the slag former particle entrance and the slag former particle outlet phase Even；

Shaped device, the shaped device has mixed material entrance and molding materials outlet, the mixed material entrance It is connected with mixed material outlet；

Drying device, the drying device has molding materials entrance, water out and dried material outlet, the article shaped Material entrance is connected with molding materials outlet；

Reduction apparatus, the reduction apparatus has dried material entrance, high-temperature flue gas outlet and reducing material outlet, described Dried material entrance is connected with dried material outlet, and the high-temperature flue gas outlet is connected with the drying device；

Molten separating device, the molten separating device has reducing material entrance, carbonaceous material entrance, vanadium-bearing hot metal outlet and clinker Outlet, the reducing material entrance is connected with reducing material outlet；

Vanadium extraction device, the vanadium extraction device has vanadium-bearing hot metal entrance, oxygen intake, half steel outlet and vanadium slag outlet, institute Vanadium-bearing hot metal entrance is stated with vanadium-bearing hot metal outlet to be connected；

Vanadium slag processing unit, the vanadium slag processing unit has vanadium slag entrance and vanadic anhydride outlet, and the vanadium slag enters Mouth is connected with vanadium slag outlet.

Thus, the system of extracting vanadium from stone coal according to embodiments of the present invention is by the way that bone coal, iron ore concentrate and slag former are sent respectively Carry out crushing and levigate to bone coal crushing and grinding apparatus, iron ore concentrate crushing and grinding apparatus and slag former crushing and grinding apparatus, be conducive to increase bone coal, iron The specific surface area of concentrate and slag former；By the bone coal particle, iron ore concentrate particle and slag former particle of above-mentioned gained in binding agent and Mix abundant in the presence of water, obtain mixed material, be conducive to increasing connecing for bone coal particle, iron ore concentrate particle and slag former particle Contacting surface is accumulated；Then said mixture material is molded, obtains molding materials, may be such that bone coal particle, iron ore concentrate particle and make Contacted between slag agent particle three abundant；Molding materials after drying, can remove the moisture in molding materials, while can be added to Porosity in type material, obtains dried material, and the thermal source that molding materials are dried derives from the high-temperature flue gas of sequential reduction device, In this way, being conducive to recycling the sensible heat of high-temperature flue gas, the energy consumption of drying device is significantly reduced, so as to reduce whole extracting vanadium from stone coal The energy consumption of system；Then above-mentioned dried material is heat-fed into reduction apparatus, the iron in carbon and dried material in dried material Reduction reaction occurs for oxide and barium oxide, obtains reducing material and high-temperature flue gas, wherein high-temperature flue gas delivers to drying device In be used for the thermal source of drying device, and reducing material delivers to molten separating device, in molten separating device, according to reducing material also original-pack The reduction situation put adds a certain amount of carbonaceous material into molten separating device so that ferriferous oxide and vanadium oxygen in reducing material Compound is fully reduced by carbon, while slag former reacts with sieve and silica-sesquioxide in reducting pellet generates low melting point salt, reduces thing Expect fusion temperature, save energy consumption；Slag former reacts into slag with sulphur phosphorus in reducing agent, and reduction vanadium-bearing hot metal sulphur phosphorus contains Amount, improves vanadium-bearing hot metal quality, final to obtain vanadium-bearing hot metal and clinker；Wherein vanadium-bearing hot metal enters vanadium extraction device, in oxygen Effect is lower to occur oxidation reaction, obtains half steel and vanadium slag, and half steel can be used for production SSC, be used as high-end casting and high-grade The raw material of steel, and vanadium slag can obtain vanadic anhydride after vanadium slag processing unit.Thus, the system makees reducing agent also with bone coal Ferriferous oxide, barium oxide in former iron ore concentrate and bone coal are to produce carbon, the vanadium in half steel and vanadium extraction, comprehensive reutilization bone coal And iron so that the content of vanadic anhydride is more than 10 times of bone coal in vanadium slag, the sulfur content in vanadium-bearing hot metal from 2.5wt% with On be down to 0.1wt%, compared to prior art, the alkaline consumption reduction by more than 70% of equivalent vanadic anhydride, energy are obtained from bone coal Consumption reduction by more than 12%.

In addition, the system of extracting vanadium from stone coal according to the above embodiment of the present invention, can also have technology additional as follows special Levy：

In some embodiments of the invention, the vanadium slag processing unit includes the first calciner, the water being sequentially connected Bath unit and the second calciner.Thus, be conducive to fully reclaiming the vanadic anhydride in vanadium slag.

In another aspect of the invention, the present invention proposes a kind of system implementation bone coal for using above-mentioned extracting vanadium from stone coal and carried The method of vanadium, embodiments in accordance with the present invention, this method includes：

(1) bone coal is supplied into the bone coal crushing and grinding apparatus and carries out broken mill processing, to obtain bone coal particle；

(2) iron ore concentrate is supplied into the iron ore concentrate crushing and grinding apparatus and carries out broken mill processing, to obtain iron ore concentrate particle；

(3) slag former is supplied into the slag former crushing and grinding apparatus and carries out broken mill processing, to obtain slag former particle；

(4) the bone coal particle, the iron ore concentrate particle, the slag former particle, binding agent and water are supplied to described Mixed in mixing arrangement, to obtain mixed material；

(5) mixed material is supplied and forming processes is carried out into the shaped device, to obtain molding materials；

(6) molding materials are supplied into the drying device and processing is dried, to obtain water and dried object Material；

(7) dried material is supplied and reduction treatment is carried out into the reduction apparatus, so as to obtain high-temperature flue gas and Reducing material, and by the drying device in the high-temperature flue gas return to step (6)；

(8) reducing material and carbonaceous material are supplied into the molten separating device and carries out molten office reason, to obtain Vanadium-bearing hot metal and clinker；

(9) vanadium-bearing hot metal and oxygen are supplied into the vanadium extraction device and carries out vanadium extraction processing, to obtain vanadium slag And half steel；

(10) vanadium slag is supplied into the vanadium slag processing unit and carries out vanadium slag processing, to obtain five oxidations two Vanadium.

Thus, the method for extracting vanadium from stone coal according to embodiments of the present invention is by the way that bone coal, iron ore concentrate and slag former are sent respectively Carry out crushing and levigate to bone coal crushing and grinding apparatus, iron ore concentrate crushing and grinding apparatus and slag former crushing and grinding apparatus, be conducive to increase bone coal, iron The specific surface area of concentrate and slag former；By the bone coal particle, iron ore concentrate particle and slag former particle of above-mentioned gained in binding agent and Mix abundant in the presence of water, obtain mixed material, be conducive to increasing connecing for bone coal particle, iron ore concentrate particle and slag former particle Contacting surface is accumulated；Then said mixture material is molded, obtains molding materials, may be such that bone coal particle, iron ore concentrate particle and make Contacted between slag agent particle three abundant；Molding materials after drying, can remove the moisture in molding materials, while can be added to Porosity in type material, obtains dried material, and the thermal source that molding materials are dried derives from the high-temperature flue gas of sequential reduction device, In this way, being conducive to recycling the sensible heat of high-temperature flue gas, the energy consumption of drying device is significantly reduced, so as to reduce whole extracting vanadium from stone coal The energy consumption of system；Then above-mentioned dried material is heat-fed into reduction apparatus, the iron in carbon and dried material in dried material Reduction reaction occurs for oxide and barium oxide, obtains reducing material and high-temperature flue gas, wherein high-temperature flue gas delivers to drying device In be used for the thermal source of drying device, and reducing material delivers to molten separating device, in molten separating device, according to reducing material also original-pack The reduction situation put adds a certain amount of carbonaceous material into molten separating device so that ferriferous oxide and vanadium oxygen in reducing material Compound is fully reduced by carbon, while slag former reacts with sieve and silica-sesquioxide in reducting pellet generates low melting point salt, reduces thing Expect fusion temperature, save energy consumption；Slag former reacts into slag with sulphur phosphorus in reducing agent, and reduction vanadium-bearing hot metal sulphur phosphorus contains Amount, improves vanadium-bearing hot metal quality, final to obtain vanadium-bearing hot metal and clinker；Wherein vanadium-bearing hot metal enters vanadium extraction device, in oxygen Effect is lower to occur oxidation reaction, obtains half steel and vanadium slag, and half steel can be used for production SSC, be used as high-end casting and high-grade The raw material of steel, and vanadium slag can obtain vanadic anhydride after vanadium slag processing unit.Thus, this method makees reducing agent also with bone coal Ferriferous oxide, barium oxide in former iron ore concentrate and bone coal are to produce carbon, the vanadium in half steel and vanadium extraction, comprehensive reutilization bone coal And iron so that the content of vanadic anhydride is more than 10 times of bone coal in vanadium slag, the sulfur content in vanadium-bearing hot metal from 2.5wt% with On be down to 0.1wt%, compared to prior art, the alkaline consumption reduction by more than 70% of equivalent vanadic anhydride, energy are obtained from bone coal Consumption reduction by more than 12%.

In addition, the method for extracting vanadium from stone coal according to the above embodiment of the present invention, can also have technology additional as follows special Levy：

In some embodiments of the invention, in step (1), the particle diameter in the bone coal particle is less than 100 μm Accounting more than 70%.Thus, be conducive to increasing processing speed, the reduction energy consumption of the method for extracting vanadium from stone coal.

In some embodiments of the invention, in step (2), the particle diameter in the iron ore concentrate particle is less than 100 μm Accounting more than 70%.Thus, processing speed, the reduction energy consumption of the method for extracting vanadium from stone coal can further be increased.

In some embodiments of the invention, in step (3), the particle diameter in the slag former particle is less than 100 μm Accounting more than 80%.Thus, processing speed, the reduction energy consumption of the method for extracting vanadium from stone coal can further be increased.

In some embodiments of the invention, in step (3), the slag former is selected from quick lime, lime stone, white clouds At least one of stone, magnesia and calcium oxide.It is preferred that dolomite or lime stone.Thus, extracting vanadium from stone coal can further be increased Processing speed, the reduction energy consumption of method, while the grade of vanadium-bearing hot metal can be lifted.

In some embodiments of the invention, it is the bone coal particle and the iron ore concentrate particle, described in step (4) Slag former particle, the binding agent, the mixing quality ratio of the water are 100：(70~100)：(30~50)：(1~2)：(7~ 9)。

In some embodiments of the invention, in step (5), the particle diameter of the molding materials is 15~20mm.Thus, Processing speed, the reduction energy consumption of the method for extracting vanadium from stone coal can further be increased.

In some embodiments of the invention, in step (6), the temperature of the drying process is 300 degrees Celsius, described The time of drying process is 15~30min.

In some embodiments of the invention, in step (7), the temperature of the reduction treatment is Celsius for 1100~1300 Degree, the time of the reduction treatment is 5~8min.

In some embodiments of the invention, in step (8), the temperature of the molten office reason is Celsius for 1500~1650 Degree.

In some embodiments of the invention, in step (8), the carbonaceous material is selected from nut coke, semi-coke, beans and Jiao At least one of charcoal.Thus, the cost of material of the method for extracting vanadium from stone coal is advantageously reduced.

In some embodiments of the invention, in step (8), the carbonaceous material and the mass ratio of the reducing material For (0.3~1)：20.

In some embodiments of the invention, in step (9), the temperature of the vanadium extraction processing is Celsius for 1320~1480 Degree.

In some embodiments of the invention, in step (10), vanadium slag processing include successively the first calcination process, Soaking treatment and the second calcination process.Thus, be conducive to fully reclaiming the vanadic anhydride in vanadium slag.

The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined Substantially and be readily appreciated that, wherein：

Fig. 1 is the system structure diagram of extracting vanadium from stone coal according to an embodiment of the invention；

Fig. 2 is the method flow schematic diagram of extracting vanadium from stone coal according to an embodiment of the invention；

Fig. 3 is the system structure diagram of the extracting vanadium from stone coal according to further embodiment of the present invention.

Embodiment

Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.

In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For one of ordinary skill in the art For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In one aspect of the invention, the present invention proposes a kind of system of extracting vanadium from stone coal.Embodiments in accordance with the present invention, With reference to Fig. 1, the system includes：Bone coal crushing and grinding apparatus 100, iron ore concentrate crushing and grinding apparatus 200, slag former crushing and grinding apparatus 300, mixing dress Put 400, shaped device 500, drying device 600, reduction apparatus 700, molten separating device 800, vanadium extraction device 900 and vanadium slag processing dress Put 1000.

Embodiments in accordance with the present invention, bone coal crushing and grinding apparatus 100 has bone coal entrance 101 and bone coal particle outlet 102, and Suitable for bone coal is carried out into broken mill processing, to obtain bone coal particle.Specifically, bone coal is crushed in bone coal crushing and grinding apparatus After levigate processing, bone coal particle is obtained, the specific surface area of bone coal particle can be dramatically increased.

According to one embodiment of present invention, the particle diameter of bone coal particle is not particularly restricted, and those skilled in the art can To be selected according to actual needs, according to the specific embodiment of the present invention, the particle diameter in bone coal particle can be less than 100 μm of accounting more than 70%.Inventor has found, when bone coal particle is excessive, can cause it is contiguously insufficient with iron ore concentrate particle, Cause stone carbon content in coal slow with ferriferous oxide reaction speed, so as to deteriorate dynamic conditions；But bone coal particle is meticulous, compound stalk forming Thing porosity is low, and heat transfer is slow, reduces reaction speed.

Embodiments in accordance with the present invention, iron ore concentrate crushing and grinding apparatus 200 has iron ore concentrate entrance 201 and iron ore concentrate particle outlet 202, and suitable for iron ore concentrate is carried out into broken mill processing, to obtain iron ore concentrate particle.Specifically, by iron ore concentrate in the broken mill of iron ore concentrate Carried out in device after broken and levigate processing, obtain iron ore concentrate particle, the specific surface area of iron ore concentrate particle can be dramatically increased.

According to one embodiment of present invention, the particle diameter of iron ore concentrate particle is not particularly restricted, those skilled in the art It can be selected according to actual needs, according to the specific embodiment of the present invention, the particle diameter in iron ore concentrate particle can be Accounting more than 70% less than 100 μm.Inventor's discovery, insufficient contact with bone coal particle when iron ore concentrate particle is excessive, bone coal Middle carbon is slow with ferriferous oxide reaction speed in iron ore concentrate, deteriorates dynamic conditions, and iron ore concentrate particle is meticulous, and compound stalk forming is difficult, And article shaped porosity is low, heat transfer is slow, reduces reaction speed.

Embodiments in accordance with the present invention, slag former crushing and grinding apparatus 300 has slag former entrance 301 and slag former particle outlet 302, and suitable for slag former is carried out into broken mill processing, to obtain slag former particle.Specifically, by slag former in the broken mill of slag former Carried out in device after broken and levigate processing, obtain slag former particle, the specific surface area of slag former particle can be dramatically increased.

According to one embodiment of present invention, the particle diameter of slag former particle is not particularly restricted, those skilled in the art It can be selected according to actual needs, according to the specific embodiment of the present invention, the particle diameter in slag former particle can be Accounting more than 80% less than 100 μm.Inventor has found that slag former particle is excessive, is not filled with bone coal, iron ore concentrate surface area contact Point so that the reaction difficulty of slag former and sulphur, phosphorus, sieve and silica-sesquioxide in bone coal, iron ore concentrate, so as to reduce reaction speed；However, Slag former particle is meticulous, and the porosity of article shaped diminishes, and causes heat transfer slow, so as to reduce reaction speed.

According to still a further embodiment, the type of slag former is not by special standby limitation, and those skilled in the art can To be selected according to actual needs, according to the specific embodiment of the present invention, slag former can be selected from quick lime, lime At least one of stone, dolomite, magnesia and calcium oxide, preferably dolomite or lime stone.Thus, advantageously reduce follow-up dry Fusion temperature of the dry pelletizing in reduction apparatus, and can reduce in subsequently molten separating device sulphur, the content of phosphorus in vanadium-bearing hot metal, Improve the grade of vanadium-bearing hot metal.

Embodiments in accordance with the present invention, mixing arrangement 400 have bone coal particle entrance 401, iron ore concentrate particle entrance 402, Slag former particle entrance 403, binding agent entrance 404, water inlet 405 and mixed material outlet 406, bone coal particle entrance 401 with Bone coal particle outlet 102 is connected, and iron ore concentrate particle entrance 402 is connected with iron ore concentrate particle outlet 202, slag former particle entrance 403 are connected with slag former particle outlet 302, and are suitable to bone coal particle, iron ore concentrate particle, slag former particle, binding agent and water Mixed, to obtain mixed material.Thus, be conducive to increasing connecing for bone coal particle, iron ore concentrate particle and slag former particle Contacting surface is accumulated.

According to one embodiment of present invention, bone coal particle and iron ore concentrate particle, slag former particle, binding agent, water it is mixed Close mass ratio to be not particularly restricted, those skilled in the art can be selected according to actual needs, according to the one of the present invention Individual specific embodiment, the mixing quality ratio of bone coal particle and iron ore concentrate particle, slag former particle, binding agent, water can be 100： (70~100)：(30~50)：(1~2)：(7~9).Inventor has found, when bone coal ratio is too high, carbon can be caused superfluous, wasted Bone coal carbon resource；But bone coal ratio is too low, ferriferous oxide reaction is insufficient, causes iron recovery low, while in vanadium-bearing hot metal Content of vanadium is low, increases vanadium resource cost recovery；When binding agent is too high, increase energy consumption, but the too low then reduction of binding agent is pressed Formation of lots thing intensity, has bad luck process breakage rate high；The too high or too low influence briquetting intensity of moisture, also increases drying heat when too high Amount, energy consumption increase.

Embodiments in accordance with the present invention, shaped device 500 has mixed material entrance 501 and molding materials outlet 502, mixes Material inlet 501 is closed with mixed material outlet 406 to be connected, and suitable for mixed material is carried out into forming processes, to be molded Material.Thus, it may be such that and fully contacted between bone coal particle, iron ore concentrate particle and slag former particle three, improve follow-up dry Rate of reduction of the material in reduction apparatus, while mixed material can avoid follow-up dried material in reduction apparatus after shaping Material is discharged with high-temperature flue gas, reduces raw material losses.

According to one embodiment of present invention, the particle diameter of molding materials is not particularly restricted, and those skilled in the art can To be selected according to actual needs, according to the specific embodiment of the present invention, the particle diameters of molding materials can for 15~ 20mm.Inventor has found, if the particle diameter of molding materials is excessive, and heat transfer rate is slow in article shaped, and reduction thermodynamics has reaction bar Part, and particle diameter is too small, poor air permeability between article shaped, heat transfer rate reduction, reduces thermodynamics and kineticses reaction condition.

Embodiments in accordance with the present invention, drying device 600 has molding materials entrance 601, water out 602 and dried material Outlet 603, molding materials entrance 601 is connected with molding materials outlet 502, and suitable for molding materials are dried into processing, with Just water and dried material are obtained.Thus, the moisture in molding materials can be removed, while the porosity in molding materials can be increased, And the thermal source that molding materials are dried derives from the high-temperature flue gas of sequential reduction device, in this way, being conducive to recycling high-temperature flue gas Sensible heat, the energy consumption of drying device is significantly reduced, so as to reduce the energy consumption of whole extracting vanadium from stone coal system.

According to one embodiment of present invention, the condition of drying process is not particularly restricted, and those skilled in the art can To be selected according to actual needs, according to the specific embodiment of the present invention, the temperature of drying process can be Celsius for 300 Degree, the time of drying process can be 15~30min.Thus, it is possible to significantly improve the drying efficiency of gained dried material.

Embodiments in accordance with the present invention, reduction apparatus 700 has dried material entrance 701, high-temperature flue gas outlet 702 and gone back Raw material outlet 703, dried material entrance 701 is connected with dried material outlet 603, high-temperature flue gas outlet 702 and drying device 600 are connected, and suitable for dried material is carried out into reduction treatment, to obtain high-temperature flue gas and reducing material, and by high-temperature flue gas Return to above-mentioned drying device.Inventor has found, by the way that dried material is heat-fed into reduction apparatus, and the carbon in dried material is with doing Reduction reaction occurs for ferriferous oxide and barium oxide in dry material, obtains reducing material and high-temperature flue gas, wherein high-temperature flue gas Delivering to is used for the thermal source of drying device in drying device, and the slag former that reducing material is delivered in molten separating device, dried material can Reacted with the sieve and silica-sesquioxide in dried material, obtain the silicate of low melting point, so that the fusion temperature of dried material is reduced, plus The speed of reduction reaction in fast reduction apparatus, and then the energy consumption of reduction apparatus is reduced, meanwhile, the slag former in dried material may be used also To be reacted with the sulphur in dried material, phosphorus objectionable impurities, sulphur, the content of phosphorus in reduction gained reducting pellet, and then reduce Sulphur, phosphorus are enriched with the interference of vanadium slag to vanadium-bearing hot metal in follow-up molten separating device.Carbon in dried material and the ferriferous oxide in itself The reaction equation for occurring reduction reaction with barium oxide mainly has：

C+Fe₂O₃=2FeO+CO (1)

C+FeO=Fe+CO (2)

2C+V₂O₅=V₂O₃+2CO (3)

Specifically, dried dried material is heat-fed into reduction apparatus, preheating section is first passed through, 4-6min is preheated, in advance The temperature of hot arc can be 900-1000 degrees Celsius, subsequently into reduction section, reduce 5-8min, and the temperature of reduction section can be 1100-1300 degrees Celsius, cooling section is finally entered, the temperature of cooling section can be 800-900 degrees Celsius, then going back gained Raw material is heat-fed into molten separating device.It should be noted that reduction apparatus is not particularly restricted, for example can be rotary hearth furnace.

Embodiments in accordance with the present invention, molten separating device 800 has reducing material entrance 801, carbonaceous material entrance 802, contained Vanadium iron water out 803 and slag outlet 804, reducing material entrance 801 are connected with reducing material outlet 703, and suitable for that will reduce Material and carbonaceous material carry out molten office reason, to obtain vanadium-bearing hot metal and clinker.Specifically, in molten separating device, according to also Reduction situation of the raw material in reduction apparatus adds a certain amount of carbonaceous material into molten separating device, is conducive in reducing material Ferriferous oxide and barium oxide fully reduced by carbon, obtain vanadium-bearing hot metal and clinker.The reaction occurred in molten point of stove is main Have：

[C]+(FeO)=[Fe]+CO (4)

[C]+(V₂O₃)=2 (VO)+CO (5)

C+ [VO]=[V]+CO (6)

Specifically, being that 800-900 degrees Celsius of reducing material is heat-fed to molten separating device by temperature, the temperature for melting separating device can be with For 1500-1650 degrees Celsius, in molten separating device, according to reducing material in reduction apparatus ferriferous oxide and barium oxide also Remaining carbon content adds the carbon containing things of reducing material 1.5wt%-5wt% into molten separating device in former situation and reducing material Material, it is melting down after insulation 20-45min so that ferriferous oxide and barium oxide are fully reduced in reducing material, obtain vanadium-bearing hot metal and Clinker.

According to still a further embodiment, the type of carbonaceous material is not particularly restricted, those skilled in the art Member can be selected according to actual needs, and according to the specific embodiment of the present invention, carbonaceous material can be selected from nut coke, orchid At least one of charcoal, beans and coke.Thus, the raw material of extracting vanadium from stone coal system can be reduced while vanadium extraction effect is ensured Cost.

According to still another embodiment of the invention, carbonaceous material and the mass ratio of reducing material can be (0.3~1)：20. Inventor has found, if carbonaceous material too high levels, cause carbon resource to waste, while promoting Si reduction to enter vanadium-bearing hot metal, reduction contains Vanadium-containing molten iron quality, and carbonaceous material content is too low, the reduction of the beneficial element such as ferriferous oxide, barium oxide is insufficient, causes iron, vanadium The wasting of resources.

There is embodiments in accordance with the present invention, vanadium extraction device 900 vanadium-bearing hot metal entrance 901, oxygen intake 902, half steel to go out Mouth 903 and vanadium slag outlet 904, vanadium-bearing hot metal entrance 901 is connected with vanadium-bearing hot metal outlet 803, and is suitable to vanadium-bearing hot metal and oxygen Gas carries out vanadium extraction processing, to obtain vanadium slag and half steel.Specifically, in vanadium extraction device, vanadium extraction temperature control is in 1320-1480 Degree Celsius, oxygen blast 5-8min, vanadium-bearing hot metal can obtain more than 15wt% containing vanadic anhydride vanadium slag in the presence of oxygen, be More than ten times of pentoxide content in bone coal, reach the purpose of Vanadium Concentrationin, the half steel of gained can be used for production SSC, As high-end casting and the raw material of high-grade steel, in this way, being conducive to recycling the half steel obtained by vanadium extraction device.Vanadium-bearing hot metal with The reaction equation of oxygen reaction mainly has：

2 [V]+3 [O]=V₂O₃ (7)

[Fe]+[O]=(FeO) (8)

2 [O]+[Si]=(SiO₂) (9)

[C]+[O]=CO (10)

There is embodiments in accordance with the present invention, vanadium slag processing unit 1000 vanadium slag entrance 1001 and vanadic anhydride to export 1002, vanadium slag entrance 1001 is connected with vanadium slag outlet 904, and suitable for vanadium slag is carried out into vanadium slag processing, to obtain five oxidations two Vanadium.Specifically, in vanadium slag processing unit, the vanadic anhydride in vanadium slag can be proposed, while alkaline consumption reduction by more than 75%.

According to one embodiment of present invention, vanadium slag processing unit is not particularly restricted, and those skilled in the art can be with Selected according to actual needs, according to the specific embodiment of the present invention, vanadium slag processing unit can include being sequentially connected The first calciner, water immersion and the second calciner.Specifically, those skilled in the art can be right according to actual needs Concrete operations condition in first calciner, water immersion and the second calciner is selected.

The system of extracting vanadium from stone coal according to embodiments of the present invention by delivering to bone coal respectively by bone coal, iron ore concentrate and slag former Crushing and grinding apparatus, iron ore concentrate crushing and grinding apparatus and slag former crushing and grinding apparatus carry out it is broken and levigate, be conducive to increase bone coal, iron ore concentrate and The specific surface area of slag former；By the bone coal particle, iron ore concentrate particle and slag former particle of above-mentioned gained in binding agent and the work of water It is abundant with lower mixing, mixed material is obtained, is conducive to increasing the contact surface of bone coal particle, iron ore concentrate particle and slag former particle Product；Then said mixture material is molded, obtains molding materials, may be such that bone coal particle, iron ore concentrate particle and slag former Contacted between particle three abundant；Molding materials after drying, can remove the moisture in molding materials, while can increase article shaped Porosity in material, obtains dried material, and the thermal source that molding materials are dried derives from the high-temperature flue gas of sequential reduction device, such as This, is conducive to recycling the sensible heat of high-temperature flue gas, the energy consumption of drying device is significantly reduced, so as to reduce whole extracting vanadium from stone coal system The energy consumption of system；Then above-mentioned dried material is heat-fed into reduction apparatus, the iron oxygen in the carbon and dried material in dried material Reduction reaction occurs for compound and barium oxide, obtains reducing material and high-temperature flue gas, wherein high-temperature flue gas is delivered in drying device For the thermal source of drying device, and reducing material delivers to molten separating device, in molten separating device, according to reducing material in reduction apparatus In reduction situation a certain amount of carbonaceous material is added into molten separating device so that ferriferous oxide in reducing material and vanadium oxidation Thing is fully reduced by carbon, while slag former reacts with sieve and silica-sesquioxide in reducting pellet generates low melting point salt, reduces material Fusion temperature, saves energy consumption；Slag former reacts into slag with sulphur phosphorus in reducing agent, reduces vanadium-bearing hot metal sulphur phosphorus content, Vanadium-bearing hot metal quality is improved, it is final to obtain vanadium-bearing hot metal and clinker；Wherein vanadium-bearing hot metal enters vanadium extraction device, in the effect of oxygen Lower generation oxidation reaction, obtains half steel and vanadium slag, and half steel can be used for production SSC, as high-end casting and high-grade steel Raw material, and vanadium slag can obtain vanadic anhydride after vanadium slag processing unit.Thus, the system does reducing agent reduced iron with bone coal Ferriferous oxide, barium oxide in concentrate and bone coal with produce the carbon in half steel and vanadium extraction, comprehensive reutilization bone coal, vanadium and Iron so that the content of vanadic anhydride is more than 10 times of bone coal in vanadium slag, the sulfur content in vanadium-bearing hot metal is from more than 2.5wt% 0.1wt% is down to, compared to prior art, the alkaline consumption reduction by more than 70% of equivalent vanadic anhydride, energy consumption are obtained from bone coal Reduction by more than 12%.

In another aspect of the invention, the present invention proposes a kind of system implementation bone coal for utilizing above-mentioned extracting vanadium from stone coal and carried The method of vanadium.Embodiments in accordance with the present invention, with reference to Fig. 2, this method includes：

S100：Bone coal is supplied into bone coal crushing and grinding apparatus and carries out broken mill processing

In the step, bone coal is supplied into bone coal crushing and grinding apparatus and carries out broken mill processing, to obtain bone coal particle.Invention People is had found, bone coal is carried out after broken and levigate processing in bone coal crushing and grinding apparatus, bone coal particle is obtained, can dramatically increase bone coal The specific surface area of particle.

S200：Iron ore concentrate is supplied into iron ore concentrate crushing and grinding apparatus and carries out broken mill processing

In the step, iron ore concentrate is supplied into iron ore concentrate crushing and grinding apparatus and carries out broken mill processing, to obtain iron ore concentrate Grain.Inventor is had found, iron ore concentrate is carried out after broken and levigate processing in iron ore concentrate crushing and grinding apparatus, iron ore concentrate particle is obtained, The specific surface area of iron ore concentrate particle can be dramatically increased.

S300：Slag former is supplied into slag former crushing and grinding apparatus and carries out broken mill processing

In the step, slag former is supplied into slag former crushing and grinding apparatus and carries out broken mill processing, to obtain slag former Grain.Inventor is had found, slag former is carried out after broken and levigate processing in slag former crushing and grinding apparatus, slag former particle is obtained, The specific surface area of slag former particle can be dramatically increased.

S400：Bone coal particle, iron ore concentrate particle, slag former particle, binding agent and water are supplied into mixing arrangement progress Mixing

In the step, bone coal particle, iron ore concentrate particle, slag former particle, binding agent and water are supplied into mixing arrangement Mixed, to obtain mixed material.Thus, be conducive to increasing connecing for bone coal particle, iron ore concentrate particle and slag former particle Contacting surface is accumulated.

S500：Mixed material is supplied into shaped device and carries out forming processes

In the step, mixed material is supplied into shaped device and carries out forming processes, to obtain molding materials.By This, may be such that and fully contacted between bone coal particle, iron ore concentrate particle and slag former particle three, improve follow-up dried material also Rate of reduction in original device, at the same mixed material can be avoided after shaping follow-up dried material in reduction apparatus material with height Warm flue gas and discharge, reduce raw material losses.

S600：Molding materials are supplied processing is dried into drying device

In the step, molding materials are supplied processing is dried into drying device, to obtain water and dried material. Thus, the moisture in molding materials can be removed, while the porosity in molding materials can be increased, and the thermal source that molding materials are dried From the high-temperature flue gas of sequential reduction device, in this way, being conducive to recycling the sensible heat of high-temperature flue gas, dry dress is significantly reduced The energy consumption put, so as to reduce the energy consumption of whole extracting vanadium from stone coal system.

S700：Dried material is supplied into reduction apparatus and carries out reduction treatment

In the step, dried material is supplied into reduction apparatus and carries out reduction treatment, to obtain high-temperature flue gas and to go back Raw material, and high-temperature flue gas is returned into the drying device in S600.Inventor has found, by the way that dried material is heat-fed to also original-pack In putting, reduction reaction occurs for ferriferous oxide in carbon and dried material and barium oxide in dried material, obtains reducing material And high-temperature flue gas, wherein high-temperature flue gas, which is delivered to, is used for the thermal source of drying device in drying device, and reducing material delivers to molten packing Put, the slag former in dried material can react with the sieve and silica-sesquioxide in dried material, the silicate of low melting point be obtained, so as to drop The fusion temperature of low dried material, accelerates the speed of reduction reaction in reduction apparatus, and then reduces the energy consumption of reduction apparatus, together When, the slag former in dried material can also react with the sulphur in dried material, phosphorus objectionable impurities, and reduction gained goes back protocorm Sulphur, the content of phosphorus in group, and then reduce the interference that sulphur, phosphorus in follow-up molten separating device are enriched with vanadium slag to vanadium-bearing hot metal.Dried material In carbon and the ferriferous oxide in itself and the barium oxide reaction equation that occurs reduction reaction mainly have：

C+Fe₂O₃=2FeO+CO (1)

C+FeO=Fe+CO (2)

2C+V₂O₅=V₂O₃+2CO (3)

S800：Reducing material and carbonaceous material are supplied into molten separating device and carry out molten office reason

In the step, reducing material and carbonaceous material are supplied into molten separating device and carry out molten office reason, to be contained Vanadium-containing molten iron and clinker.Inventor has found, in molten separating device, according to reduction situation of the reducing material in reduction apparatus to molten point A certain amount of carbonaceous material is added in device, is conducive to ferriferous oxide and barium oxide in reducing material fully to be reduced by carbon, Obtain vanadium-bearing hot metal and clinker.The reaction occurred in molten separating device mainly has：

[C]+(FeO)=[Fe]+CO (4)

[C]+(V₂O₃)=2 (VO)+CO (5)

C+ [VO]=[V]+CO (6)

S900：Vanadium-bearing hot metal and oxygen are supplied into vanadium extraction device and carry out vanadium extraction processing

In the step, by vanadium-bearing hot metal and oxygen supply into vanadium extraction device carry out vanadium extraction processing, so as to obtain vanadium slag and Half steel.Specifically, in vanadium extraction device, vanadium extraction temperature control is at 1320-1480 degrees Celsius, and oxygen blast 5-8min, vanadium-bearing hot metal exists Vanadium slag more than 15wt% containing vanadic anhydride can be obtained in the presence of oxygen, be ten times of pentoxide content in bone coal with On, the purpose of Vanadium Concentrationin is reached, the half steel of gained can be used for production SSC, the original as high-end casting and high-grade steel Material, in this way, being conducive to recycling the half steel obtained by vanadium extraction device.The reaction equation of vanadium-bearing hot metal and oxygen reaction mainly has：

2 [V]+3 [O]=V₂O₃ (7)

[Fe]+[O]=(FeO) (8)

2 [O]+[Si]=(SiO₂) (9)

[C]+[O]=CO (10)

S1000：Vanadium slag is supplied into vanadium slag processing unit and carries out vanadium slag processing

In the step, vanadium slag is supplied into vanadium slag processing unit and carries out vanadium slag processing, to obtain vanadic anhydride.Hair A person of good sense has found, in vanadium slag processing unit, can propose the vanadic anhydride in vanadium slag, while alkaline consumption reduction by more than 75%.

According to one embodiment of present invention, vanadium slag processing is not particularly restricted, and those skilled in the art can basis Be actually needed and selected, according to the present invention a specific embodiment, vanadium slag processing can include successively the first calcination process, Soaking treatment processing and the second calcination process.Specifically, those skilled in the art can fill to the first roasting according to actual needs Put, the concrete operations condition in water immersion and the second calciner is selected.

The method of extracting vanadium from stone coal according to embodiments of the present invention by delivering to bone coal respectively by bone coal, iron ore concentrate and slag former Crushing and grinding apparatus, iron ore concentrate crushing and grinding apparatus and slag former crushing and grinding apparatus carry out it is broken and levigate, be conducive to increase bone coal, iron ore concentrate and The specific surface area of slag former；By the bone coal particle, iron ore concentrate particle and slag former particle of above-mentioned gained in binding agent and the work of water It is abundant with lower mixing, mixed material is obtained, is conducive to increasing the contact surface of bone coal particle, iron ore concentrate particle and slag former particle Product；Then said mixture material is molded, obtains molding materials, may be such that bone coal particle, iron ore concentrate particle and slag former Contacted between particle three abundant；Molding materials after drying, can remove the moisture in molding materials, while can increase article shaped Porosity in material, obtains dried material, and the thermal source that molding materials are dried derives from the high-temperature flue gas of sequential reduction device, such as This, is conducive to recycling the sensible heat of high-temperature flue gas, the energy consumption of drying device is significantly reduced, so as to reduce whole extracting vanadium from stone coal system The energy consumption of system；Then above-mentioned dried material is heat-fed into reduction apparatus, the iron oxygen in the carbon and dried material in dried material Reduction reaction occurs for compound and barium oxide, obtains reducing material and high-temperature flue gas, wherein high-temperature flue gas is delivered in drying device For the thermal source of drying device, and reducing material delivers to molten separating device, in molten separating device, according to reducing material in reduction apparatus In reduction situation a certain amount of carbonaceous material is added into molten separating device so that ferriferous oxide in reducing material and vanadium oxidation Thing is fully reduced by carbon, while slag former reacts with sieve and silica-sesquioxide in reducting pellet generates low melting point salt, reduces material Fusion temperature, saves energy consumption；Slag former reacts into slag with sulphur phosphorus in reducing agent, reduces vanadium-bearing hot metal sulphur phosphorus content, Vanadium-bearing hot metal quality is improved, it is final to obtain vanadium-bearing hot metal and clinker；Wherein vanadium-bearing hot metal enters vanadium extraction device, in the effect of oxygen Lower generation oxidation reaction, obtains half steel and vanadium slag, and half steel can be used for production SSC, as high-end casting and high-grade steel Raw material, and vanadium slag can obtain vanadic anhydride after vanadium slag processing unit.Thus, this method does reducing agent reduced iron with bone coal Ferriferous oxide, barium oxide in concentrate and bone coal with produce the carbon in half steel and vanadium extraction, comprehensive reutilization bone coal, vanadium and Iron so that the content of vanadic anhydride is more than 10 times of bone coal in vanadium slag, the sulfur content in vanadium-bearing hot metal is from more than 2.5wt% 0.1wt% is down to, compared to prior art, the alkaline consumption reduction by more than 70% of equivalent vanadic anhydride, energy consumption are obtained from bone coal Reduction by more than 12%.

Below with reference to specific embodiment, present invention is described, it is necessary to which explanation, these embodiments are only description Property, without limiting the present invention in any way.

Embodiment 1

It is accounting for less than 100 μm by the broken mill of bone coal (main component of bone coal and the content of each composition are shown in Table 1) with reference to Fig. 3 Bone coal particle than 85%, the broken mill of iron ore concentrate (main component of iron ore concentrate and the content of each composition are shown in Table 2) is less than 100 μm The iron ore concentrate particle of accounting 80%, the broken mill of slag former is the slag former particle of the accounting 85% less than 100 μm, by above-mentioned bone coal Grain is with above-mentioned iron ore concentrate particle, above-mentioned slag former particle, binding agent (bentonite), water according to mass ratio 100：100：35：1.5：9 Mixed as mixing arrangement (batch mixer), it is to be mixed it is uniform after deliver to compacting balling-up or block carried out in shaped device, obtain Particle diameter is 15-20mm molding materials.Above-mentioned molding materials are sent into temperature to be done in 300 degrees Celsius of drying device Dry, drying time is 15min, removes the moisture in molding materials, obtains dried material, the thermal source of drying process is from follow-up High-temperature flue gas obtained by reduction apparatus (rotary hearth furnace).Then above-mentioned dried material is heat-fed to the preheating of reduction apparatus (rotary hearth furnace) Section, the temperature of preheating section is 900-1050 degrees Celsius, and preheating time is 6min, subsequently enters the reduction of reduction apparatus (rotary hearth furnace) Section, the temperature of reduction section is 1250 degrees Celsius, and the recovery time is 7min, finally enters the cooling section of reduction apparatus (rotary hearth furnace), The temperature of cooling section is 800-900 degrees Celsius.Carbon in reduction apparatus (rotary hearth furnace) interior dried material is aoxidized with the iron in itself The reaction equation that reduction reaction occurs for thing and barium oxide mainly has：

C+Fe₂O₃=2FeO+CO (1)

C+FeO=Fe+CO (2)

2C+V₂O₅=V₂O₃+2CO (3)

Reaction obtains reducing material, and then reducing material is heat-fed into molten separating device (molten point of stove), (molten in molten separating device Point stove) in be heated to 1600 degrees Celsius, and according to the reduction feelings of reducing material ferriferous oxide and barium oxide in reduction apparatus Remaining carbon content adds the 3wt% carbonaceous materials (nut coke) of reducing material into molten separating device in condition and reducing material, melts Insulation 28min after clear so that ferriferous oxide and barium oxide are fully reduced in reducing material, obtain vanadium-bearing hot metal (vanadium-bearing hot metal Main component and the content of each composition 3) and clinker be shown in Table, the yield of vanadium-bearing hot metal is 658.3kg bone coals per ton.In molten packing Putting the reaction of interior generation mainly has：

[C]+(FeO)=[Fe]+CO (4)

[C]+(V₂O₃)=2 (VO)+CO (5)

C+ [VO]=[V]+CO (6)

Then vanadium-bearing hot metal is come out of the stove feeding ladle, ladle is had bad luck to vanadium extraction device and carries out vanadium extraction, vanadium extraction temperature again Control is at 1440 degrees Celsius, and (its TFe content is higher than 60wt%, SiO to acid pellet cooling agent₂Content is 2~6wt%, and CaO contains Amount is less than 0.6wt%, and S contents are less than 0.06wt%, and P content is less than 0.09wt%, H₂O content is less than 1.0wt%, and the ball Group's cooling agent particle mean size is 5~50mm, wherein the ratio less than 5mm is less than 5wt%, the 2m of the pelletizing falls degradation rate and is less than Addition 5wt%) is 80kg vanadium-bearing hot metals per ton, and oxygen blast 6min, vanadium-bearing hot metal can obtain containing five oxygen in the presence of oxygen Change two vanadium 21.374wt% vanadium slag (main component of vanadium slag and the content of each composition are shown in Table 4), be vanadic anhydride in bone coal 14.39 times of content, reach the purpose of Vanadium Concentrationin, the yield of vanadium slag is 83.45kg vanadium-bearing hot metals per ton or 54.94kg stones per ton Coal, the half steel of gained can be used for production SSC, the raw material as high-end casting and high-grade steel, in this way, being conducive to reclaiming Utilize the half steel obtained by vanadium extraction device.The reaction equation of vanadium-bearing hot metal and oxygen reaction mainly has：

(Fe₂O₃)+[V]=(FeO)+(V₂O₃)

2 [V]+3 [O]=V₂O₃ (7)

[Fe]+[O]=(FeO) (8)

2 [O]+[Si]=(SiO₂) (9)

[C]+[O]=CO (10)

Above-mentioned gained vanadium slag is finally subjected to vanadium slag processing, vanadium slag processing includes the first calcination process, Soaking treatment successively With the second calcination process, in this way, can by vanadium slag vanadic anhydride propose, while alkaline consumption reduction by 81%.

To sum up, the system and method do ferriferous oxide, the barium oxide in reducing agent reduced iron concentrate and bone coal with bone coal To produce carbon, vanadium and iron in half steel and vanadium extraction, comprehensive reutilization bone coal so that the content of vanadic anhydride is stone in vanadium slag 14.39 times of coal, the sulfur content in vanadium-bearing hot metal is down to 0.1wt% from more than 2.5wt%, compared to prior art, from bone coal The middle alkaline consumption reduction by 81% for obtaining equivalent vanadic anhydride, energy consumption reduction by 14.47%.

The main component of the bone coal of table 1 and the content (wt%) of individual composition

V₂O₅	Fe	MgO	SiO₂	S	CaO	P	Al₂O₃	C	∑
										1.485	6.804	6.96	48.6	1.768	8.34	0.365	11.65	25	100

The main component of the Iron concentrate of table 2 and the content (wt%) of individual composition

Fe₂O₃	TFe	MgO	SiO₂	S	CaO	Al₂O₃	FeO	∑
									52.86	58	3.50	8.02	0.038	4.17	3.00	27	100

The main component of the vanadium-bearing hot metal of table 3 and the content (wt%) of individual composition

V	Si	C	S	P
					1.075	0.68	2.08	0.089	0.048

The main component of the vanadium slag of table 4 and the content (wt%) of individual composition

V₂O₅	SiO₂	TFe	CaO
				21.374	29.38	33.93	8.45

Embodiment 2

It is accounting for less than 100 μm by the broken mill of bone coal (main component of bone coal and the content of each composition are shown in Table 1) with reference to Fig. 3 Bone coal particle than 95%, the broken mill of iron ore concentrate (main component of iron ore concentrate and the content of each composition are shown in Table 2) is less than 100 μm The iron ore concentrate particle of accounting 95%, the broken mill of slag former is the slag former particle of the accounting 90% less than 100 μm, by above-mentioned bone coal Grain is with above-mentioned iron ore concentrate particle, above-mentioned slag former particle, binding agent (bentonite), water according to mass ratio 100：80：50：2：8.5 Mixed as mixing arrangement (batch mixer), it is to be mixed it is uniform after deliver to compacting balling-up or block carried out in shaped device, obtain Particle diameter is 15-20mm molding materials.Above-mentioned molding materials are sent into temperature to be done in 300 degrees Celsius of drying device Dry, drying time is 19min, removes the moisture in molding materials, obtains dried material, the thermal source of drying process is from follow-up High-temperature flue gas obtained by reduction apparatus (rotary hearth furnace).Then above-mentioned dried material is heat-fed to the preheating of reduction apparatus (rotary hearth furnace) Section, the temperature of preheating section is 900-1100 degrees Celsius, and preheating time is 5min, subsequently enters the reduction of reduction apparatus (rotary hearth furnace) Section, the temperature of reduction section is 1100-1300 degrees Celsius, and the recovery time is 6min, finally enters the cold of reduction apparatus (rotary hearth furnace) But section, the temperature of cooling section is 800-900 degrees Celsius.Carbon in reduction apparatus (rotary hearth furnace) interior dried material and the iron in itself The reaction equation that reduction reaction occurs for oxide and barium oxide mainly has：

C+Fe₂O₃=2FeO+CO (1)

C+FeO=Fe+CO (2)

2C+V₂O₅=V₂O₃+2CO (3)

Reaction obtains reducing material, and then reducing material is heat-fed into molten separating device (molten point of stove), (molten in molten separating device Point stove) in be heated to 1550 degrees Celsius, and according to the reduction feelings of reducing material ferriferous oxide and barium oxide in reduction apparatus Remaining carbon content adds reducing material 1.5wt% carbonaceous materials (nut coke) into molten separating device in condition and reducing material, melts Insulation 36min after clear so that ferriferous oxide and barium oxide are fully reduced in reducing material, obtain vanadium-bearing hot metal (vanadium-bearing hot metal Main component and the content of each composition 5) and clinker be shown in Table, the yield of vanadium-bearing hot metal is 543.5kg bone coals per ton.In molten packing Putting the reaction of interior generation mainly has：

[C]+(FeO)=[Fe]+CO (4)

[C]+(V₂O₃)=2 (VO)+CO (5)

C+ [VO]=[V]+CO (6)

Then vanadium-bearing hot metal is come out of the stove feeding ladle, ladle is had bad luck to vanadium extraction device and carries out vanadium extraction, vanadium extraction temperature again Control is at 1420 degrees Celsius, and (its TFe content is higher than 60wt%, SiO to acid pellet cooling agent₂Content is 2~6wt%, and CaO contains Amount is less than 0.6wt%, and S contents are less than 0.06wt%, and P content is less than 0.09wt%, H₂O content is less than 1.0wt%, and the ball Group's cooling agent particle mean size is 5~50mm, wherein the ratio less than 5mm is less than 5wt%, the 2m of the pelletizing falls degradation rate and is less than Addition 5wt%) is 90kg vanadium-bearing hot metals per ton, and oxygen blast 6min, vanadium-bearing hot metal can obtain containing five oxygen in the presence of oxygen Change two vanadium 22.69wt% vanadium slag (main component of vanadium slag and the content of each composition are shown in Table 6), be that vanadic anhydride contains in bone coal More than 15 times of amount, reach the purpose of Vanadium Concentrationin, the yield of vanadium slag is 95.22kg vanadium-bearing hot metals per ton or 51.75kg stones per ton Coal, the half steel of gained can be used for production SSC, the raw material as high-end casting and high-grade steel, in this way, being conducive to reclaiming Utilize the half steel obtained by vanadium extraction device.The reaction equation that vanadium-bearing hot metal reacts with oxygen mainly has：

(Fe₂O₃)+[V]=(FeO)+(V₂O₃)

2 [V]+3 [O]=V₂O₃ (7)

[Fe]+[O]=(FeO) (8)

2 [O]+[Si]=(SiO₂) (9)

[C]+[O]=CO (10)

Above-mentioned gained vanadium slag is finally subjected to vanadium slag processing, vanadium slag processing includes the first calcination process, Soaking treatment successively With the second calcination process, in this way, can by vanadium slag vanadic anhydride propose, while alkaline consumption reduction by 85%.

To sum up, the system and method do ferriferous oxide, the barium oxide in reducing agent reduced iron concentrate and bone coal with bone coal To produce carbon, vanadium and iron in half steel and vanadium extraction, comprehensive reutilization bone coal so that the content of vanadic anhydride is stone in vanadium slag More than 15 times of coal, the sulfur content in vanadium-bearing hot metal is down to 0.1wt% from more than 2.5wt%, compared to prior art, from bone coal The middle alkaline consumption reduction by 85% for obtaining equivalent vanadic anhydride, energy consumption reduction by 13.21%.

The main component of the vanadium-bearing hot metal of table 5 and the content (wt%) of individual composition

V	Si	C	S	P
					1.302	0.68	3.52	0.16	0.031

The main component of the vanadium slag of table 6 and the content (wt%) of individual composition

V₂O₅	SiO₂	TFe	CaO
				22.69	30.24	33.93	5.55

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification Close and combine.

Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changed, replacing and modification.

Claims

1. a kind of system of extracting vanadium from stone coal, it is characterised in that including：

Mixing arrangement, the mixing arrangement has bone coal particle entrance, iron ore concentrate particle entrance, slag former particle entrance, bonding Agent entrance, water inlet and mixed material outlet, the bone coal particle entrance are connected with the bone coal particle outlet, the iron ore concentrate Particle entrance is connected with the iron ore concentrate particle outlet, and the slag former particle entrance is connected with the slag former particle outlet；

Shaped device, the shaped device has mixed material entrance and molding materials outlet, the mixed material entrance and institute Mixed material outlet is stated to be connected；

Drying device, the drying device has molding materials entrance, water out and dried material outlet, and the molding materials enter Mouth is connected with molding materials outlet；

Reduction apparatus, the reduction apparatus has dried material entrance, high-temperature flue gas outlet and reducing material outlet, the drying Material inlet is connected with dried material outlet, and the high-temperature flue gas outlet is connected with the drying device；

There is molten separating device, the molten separating device reducing material entrance, carbonaceous material entrance, vanadium-bearing hot metal outlet and clinker to go out Mouthful, the reducing material entrance is connected with reducing material outlet；

Vanadium extraction device, the vanadium extraction device has vanadium-bearing hot metal entrance, oxygen intake, half steel outlet and vanadium slag outlet, described to contain Vanadium iron water inlet is connected with vanadium-bearing hot metal outlet；

Vanadium slag processing unit, the vanadium slag processing unit have vanadium slag entrance and vanadic anhydride outlet, the vanadium slag entrance with The vanadium slag outlet is connected.

2. system according to claim 1, it is characterised in that the vanadium slag processing unit includes the first roasting being sequentially connected Burn device, water immersion and the second calciner.

3. a kind of method of the system extracting vanadium from stone coal any one of use claim 1 or 2, it is characterised in that including：

(4) the bone coal particle, the iron ore concentrate particle, the slag former particle, binding agent and water are supplied to the mixing Mixed in device, to obtain mixed material；

(6) molding materials are supplied into the drying device and processing is dried, to obtain water and dried material；

(7) dried material is supplied and reduction treatment is carried out into the reduction apparatus, to obtain high-temperature flue gas and reduction Material, and by the drying device in the high-temperature flue gas return to step (6)；

(8) reducing material and carbonaceous material are supplied into the molten separating device and carries out molten office reason, to obtain containing vanadium Molten iron and clinker；

(10) vanadium slag is supplied into the vanadium slag processing unit and carries out vanadium slag processing, to obtain vanadic anhydride.

4. method according to claim 3, it is characterised in that in step (1), the particle diameter in the bone coal particle is small In 100 μm of accounting more than 70%；

Optional, in step (2), the particle diameter in the iron ore concentrate particle is the accounting more than 70% less than 100 μm.

5. the method according to claim 3 or 4, it is characterised in that in step (3), the grain in the slag former particle Footpath is the accounting more than 80% less than 100 μm；

Optional, in step (3), the slag former is in quick lime, lime stone, dolomite, magnesia and calcium oxide At least one, preferably dolomite or lime stone.

6. method according to claim 3, it is characterised in that in step (4), the bone coal particle and the iron ore concentrate Particle, the slag former particle, the binding agent, the mixing quality ratio of the water are 100：(70~100)：(30~50)：(1 ~2)：(7~9)；

Optional, in step (5), the particle diameter of the molding materials is 15~20mm.

7. method according to claim 3, it is characterised in that in step (6), the temperature of the drying process is 300 Degree Celsius, the time of the drying process is 15~30min；

Optional, in step (7), the temperature of the reduction treatment is 1100~1300 degrees Celsius, the reduction treatment when Between be 5~8min.

8. method according to claim 3, it is characterised in that in step (8), the temperature of the molten office reason is 1500 ~1650 degrees Celsius；

Optional, in step (8), the carbonaceous material is selected from least one of nut coke, semi-coke, beans and coke；

Optional, in step (8), the mass ratio of the carbonaceous material and the reducing material is (0.3~1)：20.

9. method according to claim 3, it is characterised in that in step (9), the temperature of the vanadium extraction processing is 1320 ~1480 degrees Celsius.

10. method according to claim 3, it is characterised in that in step (10), the vanadium slag processing includes the successively One calcination process, Soaking treatment and the second calcination process.