CN109174398A - A kind of comprehensive utilization process of vanadium titano-magnetite - Google Patents
A kind of comprehensive utilization process of vanadium titano-magnetite Download PDFInfo
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- CN109174398A CN109174398A CN201810871459.7A CN201810871459A CN109174398A CN 109174398 A CN109174398 A CN 109174398A CN 201810871459 A CN201810871459 A CN 201810871459A CN 109174398 A CN109174398 A CN 109174398A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
- B02C21/007—Disintegrating plant with or without drying of the material using a combination of two or more drum or tube mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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Abstract
The present invention relates to a kind of comprehensive utilization process of vanadium titano-magnetite, belong to the technical field of comprehensive utilization of vanadium titano-magnetite.The technical problem to be solved by the present invention is to provide a kind of comprehensive utilization process of vanadium titano-magnetite.Party's technique uses specific three sections of ball millings and four times strong magnetic process for discarding tailings, obtains ferrotianium vanadium concentrate, then carry out leaching separation respectively to iron, titanium, vanadium, obtains ferrous sulfate, containing vanadium solution and ilmenite concentrate.The present invention has carried out revolutionary transformation to traditional ore-dressing technique, and be put forward for the first time that iron, titanium, vanadium select altogether sorts new process, and beneficiation method is simple, is not necessarily to gravity treatment and flotation, dramatically reduces the cost of ore dressing, the rate of recovery of iron, titanium greatly improved.And the present invention combines physical upgrading with Chemical Leaching, mineral are efficiently separated, the iron in ferrotianium vanadium concentrate, titanium, vanadium is made all to have obtained efficiently utilizing, the utilization rate of iron improves nearly 50%, the utilization rate of titanium improves nearly 300%, and the utilization rate of vanadium improves nearly 200%.
Description
Technical field
The present invention relates to a kind of comprehensive utilization process of vanadium titano-magnetite, belong to the comprehensive utilization technique neck of vanadium titano-magnetite
Domain.
Background technique
Vanadium titano-magnetite (abbreviation schreyerite) and the property of common iron ore are essentially different, and common iron ore generally only has
A kind of magnetic material (ferroso-ferric oxide) of magnetic induction coefficient, common iron ore concentrate are sorted using traditional magnetic separator, so that it may obtain one
The iron ore concentrate (generally 60% or more) for determining grade, meets the needs of blast furnace process.And schreyerite is the members such as a kind of iron, vanadium, titanium
The mineral intergrowth of element, various elements grain size number are very close.When sorting, there is very high want to the dissociation granularity of ore first
It asks, be more specifically the sefstromite concentrate based on ferroso-ferric oxide is ferromagnetic substance, magnetic field strength is in 800-1200 Gauss
It can sort, sort rear sefstromite concentrate grade in 54~56% or so (different mineral ore concentrate grades are different),
And the titanium in schreyerite is with ilmenite (FeOTiO2Or FeTiO3) form presence, ilmenite is a kind of weak magnetic substance, often
The titanium for needing the magnetic field of 7000-8000 Gauss or more that could ilmenite be separated with other nonmagnetics, and be contained in schreyerite
Pyroxene and olivine can not efficiently separate, so as to cause current in this magnetic field strength also physical property having the same with ilmenite
Schreyerite, which sorts, generally selects sefstromite concentrate first with 800-1200 gauss magnetic field, and gravity treatment and flotation is recycled to select titanium respectively
Chats or ilmenite concentrate (contain the quantity of titanium dioxide " TiO2 ", it is 38% or so that titanium chats, which generally contains titanium dioxide, iron in mineral
Concentrate is 46% or so containing titanium dioxide).
Schreyerite (Panzhihua) carries out ore dressing using the dressing method of traditional common iron ore always in decades at present,
I.e. by broken → 1 section of ore grinding → 1 stages of magnetic separation → 2 section ore grinding → 2 stages of magnetic separation, the iron ore concentrate of grade 54~56% or so is obtained
(sefstromite concentrate, existing market price is at 240~260 yuan or so), magnetic tailing passes through gravity treatment again or flotation obtains grade and exists
Titanium chats or ilmenite concentrate between 38~46%, the throwing tail Iron grade after gravity treatment or flotation is 8~10% or so, and titanium grade is 5
~6% or so.Generally 70% or so, (wherein the iron in ilmenite concentrate accounts for 10~15% left sides of iron resource total amount to the full yield of iron
It is right), 70% or so, (wherein the titanium in sefstromite concentrate accounts for 40~50% or so of titanium resource total amount to the full yield of titanium, and titanium accounts for
40~50% or so of titanium resource total amount), so that entire schreyerite resource wastes greatly (tradition during traditional sorting process
The real recovery utilization rate of titanium resource only has 20~25% or so in ore dressing and Steelmaking).
10~11% or so titanium (without more special schreyerite) is typically contained in sefstromite concentrate, and because of titaniferous
Height, using blast furnace process sefstromite concentrate during must be incorporated a certain number of common iron ore concentrates (otherwise can not smelt),
Titaniferous causes a large amount of titanium resources not to be utilized generally 20% or so in blast furnace slag.
During sorting, vanadium generally enters in sefstromite concentrate vanadium in schreyerite, vanadium content, with vanadic anhydride
Meter is having 0.5~0.6% or so, has 25~30% or so vanadic anhydrides to enter blast furnace slag in blast furnace ironmaking process, is turning
Having in molten iron 85% or so vanadic anhydride be recovered as vanadium-rich slag in furnace vanadium extracting process, (comprehensive yield of vanadium is in the process
0.60~0.64%), in the utilization rate by the entire vanadium of vanadium extraction process about 50% or so, about 50% or so vanadium does not have
It is utilized.
The general iron content 54~56% of sefstromite concentrate at present, titaniferous 10~11%, the two grade are added, and iron, titanium resource are total
Grade reaches 64~67% or so.If it is common 64~-67% iron ore concentrate, existing market tax included price about at 650 yuan or so,
Sefstromite concentrate value per ton differs 400 yuan or so with common iron ore concentrate, this mixes as honey and sodium hydroxide, and two
The value of person is all unable to get embodiment.
In addition, also have the disadvantage that the tailing iron content height in tail is thrown in 1) magnetic separation in this traditional Proccessing technology,
Iron resource is caused to be lost；
2) magnetic clutch band and disk pack wrap up in phenomenon than more serious, so as to cause iron in a large amount of nonmagnetics residual during magnetic separation
In concentrate, iron concentrate grade is influenced；
3) one section, two stage magnetic separators throw the tailing of tail by gravity treatment or flotation recovery titanium chats or ilmenite concentrate, titanium returns
Yield generally only accounts for 40~50% of Ti content in tailing, and causing a large amount of titanium resources to be lost, (the 25~30% of titanium resource total amount are left
It is right)；
4) in entire magnetic separation, gravity treatment and floatation process, quantity of circulating water is big, and energy consumption is high.
Summary of the invention
For disadvantages described above, the technical problem to be solved by the present invention is to provide a kind of comprehensive utilization process of vanadium titano-magnetite,
Using the technique, it is not necessarily to flotation or gravity treatment, ferrotianium vanadium concentrate can be directly obtained.
The comprehensive utilization process of vanadium titano-magnetite of the present invention is not necessarily to flotation or gravity treatment, and its step are as follows:
A, tail is thrown in advance: pre- throwing tail being carried out to broken vanadium titano-magnetite using magnetic separator, magnetic field strength >=10000 are high
This, obtains tailing and rough；The granularity of broken vanadium titano-magnetite is less than 10mm；
B, one section of ball milling: rough one section of progress is milled to granularity less than 1mm, strong magnetic is then carried out again and throws tail, magnetic field is strong
>=10000 Gausses are spent, rough 1 and tailing are obtained；
C, two sections of ball millings: carrying out two sections for rough 1 and be milled to granularity less than 100 mesh, then carries out strong magnetic again and throws tail, magnetic field
Intensity >=10000 Gausses, obtains rough 2 and tailing；
D, three sections of ball millings: carrying out three sections for rough 2 and be milled to granularity less than 320 mesh, then carries out strong magnetic again and throws tail, magnetic field
Intensity >=8000 Gausses obtains ferrotianium vanadium concentrate and tailings；
Wherein, the Iron grade of the ferrotianium vanadium concentrate is 42~47%, and titanium grade is 18~24%.
Preferably, the Iron grade < 6% of the tailing in a step, b step, step c and Step d, titanium grade < 3%.
It is further preferred that the grade of the vanadium titano-magnetite are as follows: Iron grade be 40~47%, titanium grade be 10~
23%, vanadium grade >=0.4%；It is preferred that Iron grade be 44~46%, titanium grade be 18~22%, vanadium grade be 0.4%~
0.5%.
Preferably, the magnetic field strength of a step is 10000~12000 Gausses, the magnetic field strength of b step is 10000~
12000 Gausses, the magnetic field strength of step c are 10000~12000 Gausses, and the magnetic field strength of Step d is 8000~10000 Gausses.
Preferably, after Step d, following steps are also carried out:
F, acidleach: ferrotianium vanadium concentrate is used into sulfuric acid leaching, then filters, obtains pickle liquor and ilmenite concentrate；
G, precipitation: pickle liquor is adjusted pH value precipitation, and thick vanadium is obtained after filters pressing, obtains five oxidations two after purification calcining
Vanadium；
H, except the pickle liquor concentration after vanadium, filters pressing obtains ferrous sulfate monohydrate；Ferrous sulfate monohydrate is by dry, high temperature
Iron ore concentrate and sulfur dioxide are obtained after decomposition.
It is further preferred that the ilmenite concentrate obtained after acidleach, is leached again using hydrochloric acid, rich-titanium material is obtained, rich-titanium material is again
By leaching with sodium hydroxide, synthetic rutile of the grade of titanium dioxide 93~96% is obtained.
Preferably, in f step, use concentration for 30~70% sulfuric acid leaching, when being leached again using hydrochloric acid
Use concentration for 30~70% hydrochloric acid, when leaching with sodium hydroxide use concentration for 50~100% sodium hydroxide.
Preferably, it is 67~69% that the ilmenite concentrate grade of f step, which is the iron concentrate grade of 45~48%, h step,.
Preferably, the sulfur dioxide of h step produces sulfuric acid after being converted into sulfur trioxide.
Preferably, the micro alloy iron powder of grade > 95% is obtained after the iron ore concentrate direct-reduction of h step.
Compared with prior art, the invention has the following beneficial effects:
1) the characteristics of present invention is according to schreyerite, what mover iron, titanium, vanadium selected altogether first sorts new process, to traditional ore dressing
Technique has carried out revolutionary transformation, and beneficiation method is simple, be not necessarily to gravity treatment and flotation, dramatically reduce ore dressing at
This.
2) present invention uses magnetic separator technique in repeatedly, and titanium, iron content are low in tailing, can greatly improve in schreyerite
Iron, titanium recovery rate.The rate of recovery of iron improves 20~30% than traditional ore dressing, the rate of recovery of titanium than traditional ore dressing raising 15~
20%, the amount specifically improved is different and different according to head grade.
3) comprehensive utilization process of vanadium titano-magnetite of the invention combines physical upgrading with Chemical Leaching, to mineral
It is efficiently separated, utilizes the iron in sefstromite concentrate, titanium, vanadium all efficiently, be compared with the traditional method, iron
Utilization rate improve nearly 50%, the utilization rate of titanium improves nearly 300%, and the utilization rate of vanadium improves nearly 200%.
Detailed description of the invention
Fig. 1 is the other conventional process flow figure of vanadium titano-magnetite.
Fig. 2 is the comprehensive utilization process flow chart of 1 vanadium titano-magnetite of the embodiment of the present invention.
Fig. 3 is the comprehensive utilization process flow chart of 2 vanadium titano-magnetite of the embodiment of the present invention.
Specific embodiment
The comprehensive utilization process of vanadium titano-magnetite of the present invention is not necessarily to flotation or gravity treatment, and its step are as follows:
A, tail is thrown in advance: pre- throwing tail being carried out to broken vanadium titano-magnetite using magnetic separator, magnetic field strength >=10000 are high
This, obtains tailing and rough；The granularity of broken vanadium titano-magnetite is less than 10mm；
B, one section of ball milling: rough one section of progress is milled to granularity less than 1mm, strong magnetic is then carried out again and throws tail, magnetic field is strong
>=10000 Gausses are spent, rough 1 and tailing are obtained；
C, two sections of ball millings: carrying out two sections for rough 1 and be milled to granularity less than 100 mesh, then carries out strong magnetic again and throws tail, magnetic field
Intensity >=10000 Gausses, obtains rough 2 and tailing；
D, three sections of ball millings: carrying out three sections for rough 2 and be milled to granularity less than 320 mesh, then carries out strong magnetic again and throws tail, magnetic field
Intensity >=8000 Gausses, obtains concentrated ilmenite and tailing；
The method of the present invention, using three sections of ball millings and four times strong magnetic process for discarding tailings, to improve the iron in ilmenite, titanium recycling
Rate reduces the ferrotianium content in tailing, improves the utilization rate of iron, titanium, vanadium.Preferably, a step, b step, step c and Step d
In throwing tail tailing Iron grade < 6%, titanium grade < 3%.
The present invention first carries out pre- throwing tail, the original after can reducing high-pressure roller mill in this way, into before one section of mill before ball milling
Mine amount reduces the ore grinding amount of one section of mill and reduces ore grinding cost.And carry out strong magnetic after every section of ball milling and throw tail, it can be improved two
Section, the production efficiency of three sections of ore grindings, reduce ore grinding cost.
Preferably, the grade of vanadium titano-magnetite of the present invention are as follows: Iron grade be 40~47%, titanium grade be 10~
23%, vanadium grade >=0.4%；It is preferred that Iron grade be 45% or so (i.e. 44~46%), titanium grade be 20% or so (i.e. 18~
22%), vanadium grade is 0.4~0.5%.
Strong magnetic is carried out after broken and every section of ball milling and throws tail, magnetic field strength is preferred are as follows: the magnetic field strength of a step is
10000~12000 Gausses, the magnetic field strength of b step are 10000~12000 Gausses, the magnetic field strength of step c is 10000~
12000 Gausses, the magnetic field strength of Step d are 8000~10000 Gausses.
The schreyerite of tail is thrown by three sections of mill ore magnetic selections of Step d, Iron grade is in 45% or so (i.e. 42~47%), titanium grade
In 20% or so (i.e. 18~24%).The vanadium ferrotianium of Iron grade > 54%-58% can be obtained after the separation of spiral magnetic separator
The titanium chats or ilmenite concentrate of concentrate and titanium grade > 38%-46%.
Preferably, the comprehensive utilization process of vanadium titano-magnetite of the present invention obtains ferrotianium vanadium essence using above-mentioned step a~d
Then mine carries out following steps again:
F, acidleach: ferrotianium vanadium concentrate is used into sulfuric acid leaching, then filters, obtains pickle liquor and ilmenite concentrate；
G, precipitation: pickle liquor is adjusted pH value precipitation, and thick vanadium is obtained after filters pressing, obtains five oxidations two after purification calcining
Vanadium；
H, except the pickle liquor concentration after vanadium, filters pressing obtains ferrous sulfate monohydrate；Ferrous sulfate monohydrate is by dry, high temperature
Iron ore concentrate and sulfur dioxide are obtained after decomposition, sulfur dioxide herein can produce sulfuric acid.
F step leaches the ferrotianium vanadium concentrate after magnetic separation in the reactor, using sulfuric acid by concentrated ilmenite iron, vanadium,
The Elements Leachings such as calcium, magnesium, manganese and aluminium obtain the ilmenite concentrate of titanium grade > 46% (even if ferrotianium vanadium concentrate all becomes by filters pressing
At ilmenite concentrate).Schreyerite production ilmenite concentrate thoroughly takes leave of gravity treatment and flotation as a result,.
Reactor in f step can be using routine, such as reaction kettle or tubular reactor etc., it is preferred to use tubular type
Reactor can further improve the effect of leaching.
F step, which leaches, uses sulfuric acid, and in theory, common sulfuric acid concentration may be applicable to the present invention, it is preferred that use
The sulfuric acid leaching that concentration is 30~70%, the concentration can be such that Leach reaction preferably carries out.
By the ilmenite concentrate obtained after f step acidleach, grade of titanium dioxide is in 46% or so (i.e. 45~48%), Ke Yili
Leach the elements such as ferric iron, calcium, magnesium, aluminium, the manganese in ilmenite concentrate again with hydrochloric acid and using in leaching with sodium hydroxide rich-titanium material
Silica obtain grade of titanium dioxide in the synthetic rutile (high-grade titanium dioxide) of 95% or so (i.e. 93~96%).
Preferably, using using concentration to leach again for 30~70% hydrochloric acid, then use concentration for 50~100% again
Leaching with sodium hydroxide silica.
Percentage in the present invention is mass percent.
During the acidleach of f step, ferrotianium vanadium concentrate is leached in 0.5% or so vanadic anhydride 90%, is passed through
To the processes such as leachate adjustment pH value precipitation, desulfurization, filters pressing and calcining, five oxidations two of available grade > 98~99%
Vanadium, than high 1 times or so of the traditional handicraft vanadium extraction rate of recovery.
Preferably, the ilmenite concentrate grade > 46% of f step, the iron concentrate grade of h step are 67~69%.
The iron leached in ferrotianium vanadium concentrate is converted ferrous sulfate by h step, and ferrous sulfate is by dry, pyrolytic
Obtained after (800 DEG C of decomposition temperature or more) grade be up to 67~69% iron ore concentrate and sulfur dioxide (wherein have it is a small amount of three oxidation
Sulphur), 67~69% iron ore concentrate obtains the micro alloy iron powder of grade > 95% (containing many in schreyerite after direct-reduction
Microalloy ingredient), sulfur dioxide removes production sulfuric acid after being converted into sulfur trioxide and absorbing, so that 80~90% or more sulphur
It is recycled.
A specific embodiment of the invention is further described below with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described range.
Embodiment 1
As shown in Fig. 2, successively carrying out following steps after vanadium iron magnetite is carried out broken 10mm:
A, tail is thrown in advance: pre- throwing tail, magnetic field strength being carried out to broken vanadium titano-magnetite using interior magnetic field strong magnetic separator
For 10000~12000 Gausses, tailing and rough is obtained；At this point, the Iron grade < 6% in tailing, titanium grade < 3%, directly into
Enter Tailings Dam.
B, one section of ball milling: rough one section of progress is milled to partial size 1mm, interior magnetic field strong magnetic separator is then reused and carries out
Strong magnetic throws tail, and magnetic field strength is 10000~12000 Gausses, obtains rough 1 and tailing；At this point, the Iron grade < 6% in tailing,
Titanium grade < 3%, is directly entered Tailings Dam.
C, two sections of ball millings: two sections are carried out by rough 1 and is milled to -100 mesh of partial size, then reuses interior magnetic field strong magnetic separator
It carries out strong magnetic and throws tail, magnetic field strength is 10000~12000 Gausses, obtains rough 2 and tailing；At this point, the Iron grade < in tailing
6%, titanium grade < 3% are directly entered Tailings Dam.
D, three sections of ball millings: three sections are carried out by rough 2 and is milled to -320 mesh of partial size, then reuses interior magnetic field strong magnetic separator
It carries out strong magnetic and throws tail, magnetic field strength is 8000~10000 Gausses, obtains ferrotianium vanadium concentrate and tailings；At this point, the iron product in tailing
< 6%, titanium grade < 3% are directly entered Tailings Dam for position.
E, separate: throwing the schreyerite of tail by 3 sections of mill ore magnetic selections, Iron grade 45% or more, titanium grade 20% or more,
The sefstromite concentrate of Iron grade > 54%-58% and the titanium of titanium grade > 38%-46% are obtained after the separation of spiral magnetic separator
Chats or ilmenite concentrate.
Using this method, the rate of recovery of iron improves 20~30% than traditional ore dressing, and the rate of recovery of titanium is improved than traditional ore dressing
15~20%.
Embodiment 2
As shown in figure 3, vanadium iron magnetite is carried out after being broken for partial size 10mm, following steps are successively carried out:
A, tail is thrown in advance: pre- throwing tail, magnetic field strength being carried out to broken vanadium titano-magnetite using interior magnetic field strong magnetic separator
For 10000~12000 Gausses, tailing and rough is obtained；At this point, the Iron grade < 6% in tailing, titanium grade < 3%, directly into
Enter Tailings Dam.
B, one section of ball milling: rough one section of progress is milled to partial size 1mm or so, then reuses interior magnetic field strong magnetic separator
It carries out strong magnetic and throws tail, magnetic field strength is 10000~12000 Gausses, obtains rough 1 and tailing；At this point, the Iron grade < in tailing
6%, titanium grade < 3% are directly entered Tailings Dam.
C, two sections of ball millings: two sections are carried out by rough 1 and is milled to -100 mesh of partial size or so, then reuses the strong magnetic magnetic in interior magnetic field
It selects machine to carry out strong magnetic and throws tail, magnetic field strength is 10000~12000 Gausses, obtains rough 2 and tailing；At this point, the iron product in tailing
< 6%, titanium grade < 3% are directly entered Tailings Dam for position.
D, three sections of ball millings: three sections are carried out by rough 2 and is milled to -320 mesh of partial size or so, then reuses the strong magnetic magnetic in interior magnetic field
It selects machine to carry out strong magnetic and throws tail, magnetic field strength is 8000~10000 Gauss Gausses, obtains concentrated ilmenite and tailing；At this point, in tailing
Iron grade < 6%, titanium grade < 3% is directly entered Tailings Dam.45% or more, titanium grade exists concentrated ilmenite Iron grade
20% or more.
F, concentrated ilmenite acidleach: is leached into ferrotianium using sulfuric acid of the concentration in 30%-70% or so in tubular reactor
The elements such as ferrous iron, vanadium and most of calcium, magnesium, aluminium, manganese in concentrate, make concentrated ilmenite be completely converted into titanium grade >'s 46%
Ilmenite concentrate (makes ferrotianium vanadium concentrate all become ilmenite concentrate), then filters, obtains pickle liquor and ilmenite concentrate.
G, pickle liquor is adjusted pH value precipitation, filters pressing, alkali soluble, filters pressing are slagged tap, adjust pH value precipitation, filters pressing again and forges
It burns, obtains vanadic anhydride.Its vanadium yield is 90% or so.
H, after the pickle liquor concentration after precipitation, filtering obtains ferrous sulfate monohydrate；Ferrous sulfate monohydrate is by dry, high
Temperature obtains iron ore concentrate and sulfur dioxide after decomposing；It is absorbed after sulfur dioxide is inverted, sulfuric acid is prepared, so that sulfuric acid circulation benefit
Reach 80% or more with rate, and iron ore concentrate is by obtaining the micro alloy iron powder of grade > 95% after reduction.
I, ilmenite concentrate in tubular reactor using hydrochloric acid and sodium hydroxide leach again remaining ferric iron, calcium, magnesium,
The elements such as aluminium, manganese and silica obtain rich-titanium material and synthetic rutile of the grade 95% or so after filters pressing.
Using this method, the rate of recovery of iron is 95%, and the rate of recovery of titanium is 95% or so, and the rate of recovery of vanadium is 90% left
It is right.Compared with traditional handicraft, the utilization rate of iron improves nearly 50%, and the utilization rate of titanium improves nearly 300%, and the utilization rate of vanadium improves close
200%.
Claims (10)
1. a kind of comprehensive utilization process of vanadium titano-magnetite, which is characterized in that its step are as follows:
A, tail is thrown in advance: pre- throwing tail being carried out to broken vanadium titano-magnetite using magnetic separator, magnetic field strength >=10000 Gausses obtains
To tailing and rough；The granularity of broken vanadium titano-magnetite is less than 10mm；
B, one section of ball milling: carrying out rough one section and be milled to granularity less than 1mm, then carries out strong magnetic again and throws tail, and magnetic field strength >=
10000 Gausses obtain rough 1 and tailing；
C, two sections of ball millings: carrying out two sections for rough 1 and be milled to granularity less than 100 mesh, then carries out strong magnetic again and throws tail, magnetic field strength
>=10000 Gausses obtain rough 2 and tailing；
D, three sections of ball millings: carrying out three sections for rough 2 and be milled to granularity less than 320 mesh, then carries out strong magnetic again and throws tail, magnetic field strength
>=8000 Gausses obtain ferrotianium vanadium concentrate and tailings；
Wherein, the Iron grade of the ferrotianium vanadium concentrate is 42~47%, and titanium grade is 18~24%.
2. the comprehensive utilization process of vanadium titano-magnetite according to claim 1, it is characterised in that: a step, b step, c step
Rapid and the tailing in Step d Iron grade < 6%, titanium grade < 3%.
3. the comprehensive utilization process of vanadium titano-magnetite according to claim 1 or 2, it is characterised in that: the v-ti magnetite
The grade of mine are as follows: Iron grade is 40~47%, and titanium grade is 10~23%, vanadium grade >=0.4%；It is preferred that Iron grade be 44~
46%, titanium grade is 18~22%, and vanadium grade is 0.4%~0.5%.
4. the comprehensive utilization process of described in any item vanadium titano-magnetites according to claim 1~3, it is characterised in that: a step
Magnetic field strength is 10000~12000 Gausses, and the magnetic field strength of b step is 10000~12000 Gausses, the magnetic field strength of step c
For 10000~12000 Gausses, the magnetic field strength of Step d is 8000~10000 Gausses.
5. the comprehensive utilization process of vanadium titano-magnetite according to any one of claims 1 to 4, it is characterised in that: Step d it
Afterwards, following steps are also carried out:
F, acidleach: ferrotianium vanadium concentrate is used into sulfuric acid leaching, then filters, obtains pickle liquor and ilmenite concentrate；
G, precipitation: pickle liquor is adjusted pH value precipitation, and thick vanadium is obtained after filters pressing, obtains vanadic anhydride after purification calcining；
H, except the pickle liquor concentration after vanadium, filters pressing obtains ferrous sulfate monohydrate；Ferrous sulfate monohydrate is by dry, pyrolytic
After obtain iron ore concentrate and sulfur dioxide.
6. the comprehensive utilization process of vanadium titano-magnetite according to claim 5, it is characterised in that: the titanium essence obtained after acidleach
Mine is leached again using hydrochloric acid, obtains rich-titanium material, and rich-titanium material obtains grade of titanium dioxide 93 using leaching with sodium hydroxide
~96% synthetic rutile.
7. the comprehensive utilization process of vanadium titano-magnetite according to claim 6, it is characterised in that: in f step, using concentration
For 30~70% sulfuric acid leaching, used when being leached again using hydrochloric acid concentration for 30~70% hydrochloric acid, leaching with sodium hydroxide
The sodium hydroxide that Shi Caiyong concentration is 50~100%.
8. the comprehensive utilization process of vanadium titano-magnetite according to claim 5 or 6, it is characterised in that: the ilmenite concentrate of f step
Grade is that the iron concentrate grade of 45~48%, h step is 67~69%.
9. according to the comprehensive utilization process of the described in any item vanadium titano-magnetites of claim 5~8, it is characterised in that: h step
Sulfur dioxide produces sulfuric acid after being converted into sulfur trioxide.
10. according to the comprehensive utilization process of the described in any item vanadium titano-magnetites of claim 5~9, it is characterised in that: h step
Iron ore concentrate direct-reduction after obtain the micro alloy iron powder of grade > 95%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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