CN109880954A - A method of promoting vanadium titano-magnetite utility value - Google Patents
A method of promoting vanadium titano-magnetite utility value Download PDFInfo
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Abstract
The invention belongs to titanium slag technical field of smelting, disclose a kind of method for promoting vanadium titano-magnetite utility value, comprising the following steps: 1) v-ti magnetite green ore obtains v-ti magnetite concentrate and tailing through magnetic separation；2) v-ti magnetite concentrate obtains iron ore concentrate through Counterfloatating desiliconization, and the iron ore concentrate, coal dust and auxiliary material are reacted in SRV furnace, obtains molten iron and clinker；3) tailing obtains ilmenite concentrate through magnetic separation, flotation；4) ilmenite concentrate and reducing agent that clinker that step 2 obtains, step 3) obtain are smelted in titanium slag furnace, obtains half steel and titanium slag.The method of the present invention can make full use of the titanium resource in iron ore concentrate, improve the production efficiency and capacity usage ratio of titanium slag, reduce environmental pollution.
Description
Technical field
The invention belongs to titanium slag technical field of smelting, and in particular to a method of promote vanadium titano-magnetite utility value.
Background technique
Sichuan area is the v-ti magnetite ore-rock mine storage area an of ultra-large type, mainly by Panzhihua, red lattice, white
Horse, the big mining area in Taihe county four composition.Nearly 10,000,000,000 tons, 20,000,000,000 tons of prospective reserves or more of its explored v-ti magnetite ore reserves；
Wherein the titanium resource of symbiosis is (with TiO2Meter) be 8.7 hundred million tons, the 90.54% of Zhan Quanguo titanium resource gross reserves, it is total to account for world's titanium resource
The 35.17% of reserves, occupies first place in the world.PZH vanadic-titanomagnetite belongs to complex multi-metal rock mine, mineral composition and preservation shape
State is complicated, compact structure, difficult tribulation choosing.Iron ore concentrate and ilmenite concentrate are obtained after vanadium titano-magnetite is sorted, wherein ilmenite concentrate upgrades
For acid-dissolved titanium slag or it is directly used in sulfate process titanium dioxide.Iron ore concentrate extracts metallic iron by sintering, blast furnace process, obtains simultaneously
TiO2The high-titanium blast furnace slag of content 20%-26%, this part slag is not utilized at present, and long-term stacking both caused titanium to provide
The significant wastage in source, while there are larger impacts to environment.
A large amount of research work, the main technical schemes of proposition are carried out for the comprehensive utilization of steel climbing high slag both at home and abroad
Have: high temperature cabonization-low temperature chlorination produces TiCl4Residue technology for preparing cement；High temperature cabonization-carbide slag sorts titanium carbide technique；Silicon
Thermal method restores blast furnace slag-direct current furnace and smelts ferro-silico-titanium technique；Fusion electrolysis legal system takes silicon titanium-aluminium alloy technique；Sulfuric acid process
Produce TiO2Technique；High temperature modified processing-selective enrichment titaniferous ore-Mineral separation technology；Direct beneficiation enrichment perovskite
Technology；Alkali process slag phase isolation technics etc..There is certain deficiency in above-mentioned technology, be difficult to combine technology and economically feasible
Property, therefore, how it is cost-effective using this part blast furnace slag be still an important research topic.
Summary of the invention
For above situation, the object of the present invention is to provide a kind of methods for promoting vanadium titano-magnetite utility value.To biography
System technique improves, and iron ore concentrate is carried out reduction melting in advance using HIsmelt smelting reduction technology, the slag that melting is obtained
Iron separation obtains low-grade titanium slag, then the titanium slag is sent into titanium slag furnace and carries out reducing and smelting together with ilmenite concentrate, available in this way
Compared with high-grade titanium slag.This method can make full use of the titanium resource in iron ore concentrate, improve the production efficiency and capacity usage ratio of titanium slag,
It reduces environmental pollution.
HIsmelt technique is representative fused reduction iron-smelting technology at present, is a kind of usable miberal powder and Fei Jiao
The direct melting technique of coal dust.Be used for the processing of vanadium titano-magnetite, coke can not used completely, directly use coal dust as
The origin of heat of reducing agent and system, to eliminate the generation of harmful substance in process of coking；It, can without pelletizing or sintering
Powder is directly used, the generation and discharge of the pollutants such as dioxin in preprocessing process, nitrogen oxides are eliminated；Crude fuel is applicable in
Property strong, high production efficiency, process flow be succinct, flexible operation, low-carbon environment-friendly.
The present invention provides a kind of methods for promoting vanadium titano-magnetite utility value, comprising the following steps:
1) v-ti magnetite green ore obtains v-ti magnetite concentrate and tailing through magnetic separation；
2) v-ti magnetite concentrate obtains iron ore concentrate through Counterfloatating desiliconization, the iron ore concentrate, coal dust and auxiliary material in SRV furnace into
Row reaction, obtains molten iron and clinker；
3) tailing obtains ilmenite concentrate through magnetic separation, flotation；
4) ilmenite concentrate and reducing agent that clinker that step 2 obtains, step 3) obtain are smelted in titanium slag furnace, obtains half
Steel and titanium slag.
In the present invention, the magnetic separation of v-ti magnetite green ore, the Counterfloatating desiliconization of v-ti magnetite concentrate and the magnetic of tailing
The Conventional procedures of this field are selected in the operations such as choosing, flotation, are subject to and are reached required product of the present invention.
Preferably, mass ratio > 90% shared by particle of the granularity less than 4mm in the iron ore concentrate, all iron content of iron ore concentrate >
55%。
In the present invention, the coal dust can for popular smokeless coal or contain part bituminous coal.Preferably, the fixation in the coal dust
Carbon>65%, volatile matter>8%, sulphur<7%.
Preferably, the auxiliary material is dolomite and/or lime.
Preferably, in step 2, the mass ratio of the iron ore concentrate, coal dust and auxiliary material is 10 ~ 15: 3 ~ 5: 0.3 ~ 1.0.
In the present invention, nitrogen stream carries iron ore concentrate, coal dust and auxiliary material and is entered in the molten bath of SRV furnace by side wall blowing hot air
Melting is carried out, the temperature of blowing hot air is 850 ~ 1200 DEG C.Coal dust is volatilized into rapidly C particle at high temperature, partially fuses into metal
Molten bath, iron ore concentrate and coal dust complete reduction reaction in SRV furnace, form molten iron in molten bath lower part, clinker (titanium slag) is then enriched in
Molten bath upper layer.
Liquid slag (the TiO that will be generated in SRV furnace2> 40%) it is discharged, is slagged tap within 1.5 ~ 2.5 hours primary by slag-drip opening,
And be sent into titanium slag furnace, it is smelted with ilmenite concentrate and reducing agent.
Preferably, in step 4), the titanium grade of the ilmenite concentrate can be with > 40%, preferably titanium grade > 45%.
Preferably, the reducing agent is one or more of anthracite, metallurgical coke and petroleum coke.Anthracite herein,
Metallurgical coke and petroleum coke are all made of the specification of high fixed carbon (fixed carbon > 70%).
Preferably, in step 4), the mass ratio of the clinker, ilmenite concentrate and reducing agent is 8 ~ 11: 4 ~ 10: 0.8 ~ 1.1.
Preferably, in step 4), the temperature of the smelting is 1600 ~ 2000 DEG C.
Titanium slag and half steel, which are carried out separation using conventional method, can be obtained the higher titanium slag product (TiO of titanium grade2:
70% ~ 75%).
The technological parameter not being limited in the present invention selects the usual manner of this field to carry out, for example, magnetic separation, flotation
Deng operation.
Compared with prior art, the invention has the following beneficial effects:
(1) titanium slag is prepared using HIsmelt smelting reduction technology, SRV furnace titanium slag mobility can be improved, promote TiO2It is effectively rich
Collection, and titanium slag hyperoxia gesture inhibits TiC, TiN to generate in furnace, and is enough to control slag viscosity, and slag iron can be easily separated.
(2) HIsmelt smelting reduction technology is strong to adaptability to raw material, does not use coke, directly uses coal dust.Can directly it make
With powdery iron ore concentrate, it is not necessarily to pelletizing or sintering, saves cost.
(3) iron ore concentrate is smelted together with ilmenite concentrate at the laggard titanium slag furnace of liquid titanium slag by melting and reducing and is obtained compared with high-grade
Titanium slag is used for sulfate process titanium dioxide, not only improves the utility value of titanium in iron ore concentrate, can also substantially reduce the materials such as coal, petroleum coke
Use, the sulfide discharged to atmosphere, nitrogen oxides is well below blast furnace system.
(4) present invention combines production titanium slag using HIsmelt smelting reduction technology and electro-smelting technology, can sufficiently send out
The advantages of waving each technology farthest reduces energy consumption, improves capacity usage ratio, reduces pollutant discharge amount, and HIsmelt is molten
Melt that reduction technique process is short, discharge of poisonous waste is few, when to iron ore concentrate reduction melting, the carbon in iron ore concentrate and molten bath occurs also
Original reaction generates CO, and the volatile matter in coal is generated H by thermal cracking2, CO and H2The big calorimetric of burning generation can be continuous in oxygen-enriched hot air
The progress of the reduction reaction in SRV furnace is maintained, the waste heat and surplus gas that system generates can be supplied to hot-blast stove and subsequent power generation.
Detailed description of the invention
Fig. 1: the process flow chart of present invention promotion vanadium titano-magnetite utility value method.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with the embodiment of the present invention, it is clear that retouched
The embodiment stated is only a part of the embodiment of the present invention, instead of all the embodiments.
The method that embodiment 1-3 is used to illustrate promotion vanadium titano-magnetite utility value of the invention.
Embodiment 1
1) v-ti magnetite green ore obtains v-ti magnetite concentrate and tailing through magnetic separation；
2) v-ti magnetite concentrate obtains iron ore concentrate through Counterfloatating desiliconization, and nitrogen stream carries iron ore concentrate, coal dust and auxiliary material and passes through
Side wall blowing hot air is sent into the molten bath of SRV furnace, and blowing hot air temperature is 850 ~ 1200 DEG C, and iron ore concentrate (miberal powder) and coal dust exist
Reduction reaction is completed in SRV furnace, forms molten iron in molten bath lower part, titanium slag is enriched in molten bath upper layer；Wherein, in iron ore concentrate 4mm with
Mass ratio > 95%, TFe:58.0% shared by lower particle；Coal dust is anthracite, fixed carbon: 67%, volatile matter: and 8%, sulphur: 0.9%；Auxiliary material
For dolomite；The adding proportion (mass ratio) of each material is iron ore concentrate: coal dust: dolomite=10: 3: 0.3；
3) tailing obtains ilmenite concentrate through magnetic separation, flotation；
4) liquid slag (TiO that will be generated in SRV furnace2: it 41% or so) is discharged, is slagged tap within 2 hours primary, and be sent by slag-drip opening
Titanium slag electric furnace, is added the ilmenite concentrate that step 3) obtains in titanium slag furnace, and the titanium grade of ilmenite concentrate is 46%, then adds into titanium slag furnace
Enter a certain amount of anthracite, SRV furnace titanium slag, ilmenite concentrate and anthracitic mass ratio be 9: 7: 0.8, SRV furnace titanium slag, ilmenite concentrate and
Anthracite is smelted in titanium slag furnace, and smelting temperature is 1600 ~ 2000 DEG C, obtains melting titanium slag and half steel, by titanium slag and half
The titanium slag product that the isolated titanium grade of steel is 74% or so.
Embodiment 2
1) v-ti magnetite green ore obtains v-ti magnetite concentrate and tailing through magnetic separation；
2) v-ti magnetite concentrate obtains iron ore concentrate through Counterfloatating desiliconization, and nitrogen stream carries iron ore concentrate, coal dust and auxiliary material and passes through
Side wall blowing hot air is sent into the molten bath of SRV furnace, and blowing hot air temperature is 850 ~ 1200 DEG C, and iron ore concentrate (miberal powder) and coal dust exist
Reduction reaction is completed in SRV furnace, forms molten iron in molten bath lower part, titanium slag is enriched in molten bath upper layer；Wherein, in iron ore concentrate 3mm with
Mass ratio > 90%, TFe:58.8% shared by lower particle；Coal dust be high heat value smokeless coal, calorific value: 6100 cal, fixed carbon: 68%,
Volatile matter: 9%, sulphur: 0.7%；Auxiliary material is dolomite；The adding proportion (mass ratio) of each material is iron ore concentrate: coal dust: dolomite=
15:5:1.0；
3) tailing obtains ilmenite concentrate through magnetic separation, flotation；
4) liquid slag (TiO that will be generated in SRV furnace2: it 42% or so) is discharged, is slagged tap within 1.5 hours primary, and send by slag-drip opening
Enter titanium slag electric furnace, the ilmenite concentrate that step 3) obtains is added in titanium slag furnace, the titanium grade of ilmenite concentrate is 45%, then into titanium slag furnace
A certain amount of metallurgical coke is added, the mass ratio of SRV furnace titanium slag, ilmenite concentrate and metallurgical coke is 10: 5: 0.9, SRV furnace titanium slag, titanium essence
Mine and anthracite are smelted in titanium slag furnace, and smelting temperature is 1700 ~ 1900 DEG C, melting titanium slag and half steel are obtained, by titanium slag
The titanium slag product for being 70% or so with the isolated titanium grade of half steel.
Embodiment 3
1) v-ti magnetite green ore obtains v-ti magnetite concentrate and tailing through magnetic separation；
2) v-ti magnetite concentrate obtains iron ore concentrate through Counterfloatating desiliconization, and nitrogen stream carries iron ore concentrate, coal dust and auxiliary material and passes through
Side wall blowing hot air is sent into the molten bath of SRV furnace, and blowing hot air temperature is 850 ~ 1200 DEG C, and iron ore concentrate (miberal powder) and coal dust exist
Reduction reaction is completed in SRV furnace, forms molten iron in molten bath lower part, titanium slag is enriched in molten bath upper layer；Wherein, in iron ore concentrate 4mm with
Mass ratio > 94%, TFe:58.4% shared by lower particle；Coal dust be high heat value smokeless coal, calorific value: 6000 cal, fixed carbon: 66%,
Volatile matter: 8%, sulphur: 0.5%；Auxiliary material is dolomite；The adding proportion (mass ratio) of each material is iron ore concentrate: coal dust: dolomite=
13:4:0.5；
3) tailing obtains ilmenite concentrate through magnetic separation, flotation；
4) liquid slag (TiO that will be generated in SRV furnace2: it 40% or so) is discharged, is slagged tap within 1.5 hours primary, and send by slag-drip opening
Enter titanium slag electric furnace, the ilmenite concentrate that step 3) obtains is added in titanium slag furnace, the titanium grade of ilmenite concentrate is 47%, then into titanium slag furnace
A certain amount of metallurgical coke is added, the mass ratio of SRV furnace titanium slag, ilmenite concentrate and metallurgical coke is 8: 6: 1.1, SRV furnace titanium slag, ilmenite concentrate
Smelted in titanium slag furnace with anthracite, smelting temperature is 1700 ~ 1900 DEG C, obtain melting titanium slag and half steel, by titanium slag and
The titanium slag product that the isolated titanium grade of half steel is 72% or so.
The titanium slag product that titanium grade is greater than 70% can be made using method of the invention, while can be made full use of in iron ore concentrate
Titanium resource, improve the production efficiency and capacity usage ratio of titanium slag, reduce environmental pollution.
The embodiment of the present invention is described above, above description is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.Without departing from the scope and spirit of illustrated embodiment, for the art
Many modifications and changes are obvious for those of ordinary skill.
Claims (10)
1. a kind of method for promoting vanadium titano-magnetite utility value, which comprises the following steps:
1) v-ti magnetite green ore obtains v-ti magnetite concentrate and tailing through magnetic separation；
2) v-ti magnetite concentrate obtains iron ore concentrate through Counterfloatating desiliconization, the iron ore concentrate, coal dust and auxiliary material in SRV furnace into
Row reaction, obtains molten iron and clinker；
3) tailing obtains ilmenite concentrate through magnetic separation, flotation；
4) ilmenite concentrate and reducing agent that clinker that step 2 obtains, step 3) obtain are smelted in titanium slag furnace, obtains half
Steel and titanium slag.
2. the method according to claim 1 for promoting vanadium titano-magnetite utility value, it is characterised in that: in the iron ore concentrate
Mass ratio > 90% shared by particle of the granularity less than 4mm, all iron content > 55% of iron ore concentrate.
3. the method according to claim 1 or 2 for promoting vanadium titano-magnetite utility value, it is characterised in that: the coal dust
In fixed carbon>65%, volatile matter>8%, sulphur<7%.
4. the method according to claim 1 for promoting vanadium titano-magnetite utility value, it is characterised in that: the auxiliary material is white
Marble and/or lime.
5. the method according to claim 1 for promoting vanadium titano-magnetite utility value, it is characterised in that: in step 2, institute
The mass ratio for stating iron ore concentrate, coal dust and auxiliary material is 10 ~ 15: 3 ~ 5: 0.3 ~ 1.0.
6. promoting the method for vanadium titano-magnetite utility value according to claim 1 or 5, it is characterised in that: in step 2,
Nitrogen stream carrying iron ore concentrate, coal dust and auxiliary material are entered by side wall blowing hot air carries out melting, blowing hot air in the molten bath of SRV furnace
Temperature be 850 ~ 1200 DEG C.
7. the method according to claim 1 for promoting vanadium titano-magnetite utility value, it is characterised in that: in step 4), institute
State titanium grade > 45% of ilmenite concentrate.
8. the method according to claim 1 for promoting vanadium titano-magnetite utility value, it is characterised in that: the reducing agent is
One or more of anthracite, metallurgical coke and petroleum coke.
9. the method according to claim 1 for promoting vanadium titano-magnetite utility value, it is characterised in that: in step 4), institute
The mass ratio for stating clinker, ilmenite concentrate and reducing agent is 8 ~ 11: 4 ~ 10: 0.8 ~ 1.1.
10. promoting the method for vanadium titano-magnetite utility value according to claim 1 or described in 9, it is characterised in that: step 4)
In, the temperature of the smelting is 1600 ~ 2000 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480882A (en) * | 2022-01-18 | 2022-05-13 | 龙佰集团股份有限公司 | Method for fully utilizing ferrotitanium vanadium resources in vanadium-titanium magnetite |
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Effective date of registration: 20230418 Address after: 651600 Dapingzi, Shishan town, Wuding County, Chuxiong Yi Autonomous Prefecture, Yunnan Province Patentee after: Wudingguo Titanium Metal Co.,Ltd. Address before: 1669 Jiaoke Road, zhongzhan District, Jiaozuo City, Henan Province Patentee before: HENAN BILLIONS NEW MATERIAL Co.,Ltd. |