CN104060108B - A kind of method extracting vanadium from high calcium siliceous shale containing vanadium - Google Patents

A kind of method extracting vanadium from high calcium siliceous shale containing vanadium Download PDF

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CN104060108B
CN104060108B CN201410255114.0A CN201410255114A CN104060108B CN 104060108 B CN104060108 B CN 104060108B CN 201410255114 A CN201410255114 A CN 201410255114A CN 104060108 B CN104060108 B CN 104060108B
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vanadium
calcium
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raw ore
ore
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CN104060108A (en
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孙伟
王丽
胡岳华
刘润清
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Central South University
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Abstract

The present invention relates to a kind of method extracting vanadium from high calcium siliceous shale containing vanadium, belong to siliceous shale navajoite technical field of beneficiation.The present invention is by ore reduction to below 3mm, after being processed by classification, by the mode of operation first selecting calcium to select vanadium again, processes high calcium siliceous shale containing vanadium, it is achieved that the enrichment of calcium and vanadium metal and recovery.In gained calcium concentrate of the present invention, the grade of calcium oxide is 5 7.5 times for calcium oxide grade in raw ore;In gained vanadium concentrate, the grade of vanadic anhydride is 1.8 2.4 times of the grade of vanadic anhydride in raw ore;Gained mine tailing accounts for the 60 65% of raw ore gross mass.The overall recovery of calcium of the present invention is 70 82%, and the overall recovery of vanadium is more than or equal to 73%.The present invention is simple to operate, practical, it is simple to industrial applications.

Description

A kind of method extracting vanadium from high calcium siliceous shale containing vanadium
Technical field
The present invention relates to a kind of method extracting vanadium from high calcium siliceous shale containing vanadium, belong to the choosing of siliceous shale navajoite Ore deposit technical field.
Background technology
The reason that due to the navajoite market price and ore nature, do not carry out large-scale ore dressing for a long time Process, only to V2O5Ore more than 0.8% for the grade carries out metallurgical vanadium extraction, the amount of metal of this part ore deposit less than The 39.6% of the total amount of metal of ore body, causes the bulk deposition of low-grade siliceous shale containing vanadium.In siliceous shale navajoite Carbonate, carbonaceous content are higher, and vanadium grade ratio is relatively low, and during acidleach, acid consumption is very big, directly smelts There is no economic benefit.
Select vanadium for from high calcium siliceous shale containing vanadium type ore, have very scholar to be studied it both at home and abroad, But never realizing industrialized production, its reason may is that they use single flotation calcium or single floating Selecting the method for vanadium, either single flotation calcium or single flotation vanadium, its premise is must to crush raw ore, Once raw ore crushes, then quartz, barite, calcite etc. can be enriched with in coarse grain, and mica, height The clay pits such as ridge stone are inevitable in fine fraction enrichment, at this moment, directly use flotation, certainly exist flotation effect not good, As used the method for single flotation calcium, gangue mineral calcium is removed by the method, so that vanadium obtains richness in mine tailing Collection, owing to further the vanadium in mine tailing not being enriched with further so that floatation indicators is poor, the enrichment of vanadium Ratio is low.When Leaching Vanadium from mine tailing, due to the existence of a large amount of gangues, substantial amounts of alkali or acid will necessarily be consumed, Thus it is unfavorable for industrialized production;Vanadium and calcium, coming on vanadium enrichment, are separated by the method for single flotation vanadium, by Relatively thin in ore grain size, flotation effect is not good, selects vanadium to scan number of times too much, and flow process is complicated, and does not fully return Receive the resource such as barite, calcite in ore.
Use classification to coordinate the technique of floating and enriching vanadium after first decalcification in a word, pertinent literature has no report.
Content of the invention
The present invention is directed to the deficiencies in the prior art, a kind of low cost, calcium vanadium good separating effect, the utilization of resources are provided The high method extracting vanadium from high calcium siliceous shale containing vanadium of rate.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, comprises the steps:
Step one is classified
By crushing raw ore to below 3mm, adding dispersant and water, preparation ore quality percentage concentration is Carry out classification process after the slurry of 25%-33%, obtain sludge and coarse grain ore in sand form;Five oxidation two in described ore deposit sludge The grade of vanadium is 3.4-3.7 times of the grade of vanadic anhydride in raw ore, owing to the grade of vanadium in sludge is higher, Directly as vanadium concentrate;In described raw ore, the grade of calcium oxide is more than or equal to 3.15%;The grade of vanadic anhydride More than or equal to 0.60%;
Step 2 flotation calcium
Step one gained coarse grain ore in sand form is crushed to the particle that fineness is-0.074mm and accounts for coarse grain ore in sand form gross mass After 55-75%, add water, gangue inhibitor, calcium collecting agent, foaming agent, be made into coarse grain ore in sand form percent mass Concentration is the slurry of 30-35%;Then carry out flotation, obtain calcium concentrate and select vanadium magma;In described calcium concentrate 5-7.5 times that the grade of calcium oxide is calcium oxide grade in raw ore;Calcium concentrate can be used to neutralize the leaching of follow-up vanadium Acid used when going out;In practical operation engineering, by observing the enriched substance on flotation froth surface, judge this The process of section flotation, when foam is emptying, terminates this section of flotation;
Step 3 flotation vanadium
Toward selecting addition pH adjusting agent in vanadium magma, after regulation pH value to 34, gangue inhibitor, vanadium is added to catch Receive agent, carry out flotation, obtain vanadium concentrate and tailings;In described vanadium concentrate, the grade of vanadic anhydride is in raw ore 1.8 2.4 times of the grade of vanadic anhydride.
The present invention a kind of from high calcium siliceous shale containing vanadium extract vanadium method, by crushing raw ore to 3mm with Under, add water and size mixing, after preparing the slurry that ore quality percentage concentration is 50%-60%, carry out washup, washup Adding 800-1500g dispersant by raw ore per ton, after washup terminates, adding water sizes mixing obtains ore quality hundred simultaneously Point concentration is the slurry of 25%-33%.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, the calcium oxide grade in described raw ore For 3.15-4.55%, preferably 15.25-34.25%;The grade of vanadic anhydride is 0.60-0.80%, is preferably 1.85-2.05%.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, classification described in step one processes choosing Spin current classification, sieve classification, shaking table classification in one.It is preferably cyclone classification.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, in step 2,
Gangue inhibitor adds the ratio of 800 1000g to add in raw ore per ton;
Calcium collecting agent adds the ratio of 200 320g to add in raw ore per ton;
Foaming agent adds the ratio of 30 40g to add in raw ore per ton.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, in step 3,
Gangue inhibitor adds the ratio of 200 300g to add in raw ore per ton;
Vanadium collecting agent adds the ratio of 80 120g to add in raw ore per ton.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, described dispersant is selected from hexa metaphosphoric acid At least one in sodium, waterglass, prodan, carboxymethylcellulose calcium.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, described gangue inhibitor is inclined selected from six At least one in sodium phosphate, waterglass, prodan.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, described calcium collecting agent is selected from tristearin Acid, neopelex, at least one in enuatrol.
The present invention a kind of from high calcium siliceous shale containing vanadium extract vanadium method, described foaming agent selected from terpenic oil, At least one in methyl isobutyl carbinol (MIBC).
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, described vanadium collecting agent is selected from the tetradecane At least one in base tributyl phosphorus chloride, ether amines, DTAC.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, in step 3, described pH is regulated At least one in phosphoric acid, hydrochloric acid for the agent.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, the overall recovery of calcium is 70-82%, The overall recovery of vanadium is more than or equal to 73%.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, mine tailing accounts for raw ore gross mass 60-65%, mine tailing may be used for construction material.
A kind of method extracting vanadium from high calcium siliceous shale containing vanadium of the present invention, owing to throwing except mine tailing so that leaching When going out vanadium, required acid solution or alkali lye reduce in a large number, simultaneously after ore dressing so that vanadium is easier to leach, and leaching The quality going out liquid is also far superior to from raw ore use the quality directly leaching gained leachate.
Principle and technique effect
Owing to the mineral composition of high calcium siliceous shale containing vanadium type ore is generally the clays such as quartz, mica, kaolinite Mineral, pyrite, calcite, barite etc., these hardness of mineral difference are very big, quartzy in grinding process, Barite, calcite (CaCO3) etc. can form coarse grain, and the embedding cloth of the clay mineral such as mica, kaolinite itself Granularity is just thinner, and under equal breaking strength, the clay mineral such as mica, kaolinite is certain to form particulate. Calcium is mainly enriched on barite and calcite simultaneously, and vanadium is typically enriched in the clay pit such as mica, kaolinite. So the present invention is initially with cyclone classification.The present invention, by after ore reduction to-3mm, adds dispersant and water, Preparation ore quality percentage concentration is the slurry of 25%-33%, then carries out cyclone classification, suitable granularity, Under the synergy of the condition such as concentration, dispersant, the rich little particle of vanadium (except reunion), substantially at eddy flow It is collected at the overflow pipe of device, be sludge.Not only reclaimed the little particle of rich vanadium by cyclone classification, also simultaneously Eliminate the adverse effect to follow-up flotation for the fine mineral.After cyclone classification, use flotation after first removing calcium rich The flow process of collection vanadium, utilizes the technology again crushing cleverly, by gangue (predominantly quartz), calcite, weight After the bigger mineral of the hardness such as spar are crushed to rational granularity, achieve calcium by flotation and separate with vanadium;Simultaneously During flotation calcium, the fine particle of the clay pit such as mica, kaolinite is gradually grown up, in order to not make too much Vanadium enter in calcium concentrate, then in vanadium magma, add pH adjusting agent, after regulation pH value to 3-4, enter Row flotation vanadium, during regulation pH, the fine particle of the clay pit such as mica, kaolinite gradually grows to symbol Close the granularity that flotation requires, with this understanding by pH adjusting agent, vanadium collecting agent, gangue inhibitor collaborative Effect, successfully achieves efficiently selecting of vanadium.Also just solve in prior art and run into when directly selecting vanadium A difficult problem.
In a word, after the present invention uses classification, the process route of vanadium is selected in first deliming again, achieves unexpected effect, Solve prior art simultaneously and be difficult to a difficult problem for efficient vanadium extracting from high calcium siliceous shale containing vanadium type ore.The present invention Gained calcium concentrate can be used for can be used to neutralize acid used when follow-up vanadium leaches, and gained vanadium concentrate is through acidleach source It after reason, is used directly for the preparation of vanadic anhydride or vanadium;The leached mud of gained mine tailing and vanadium concentrate is permissible For construction material;Gained vanadium concentrate of the present invention, separates with mine tailing owing to achieving it, after greatly reducing The acid consumption of continuous technique or alkaline consumption, this is just greatly saved the cost of smelting.The overall beneficiation cost of the present invention is relatively low, There is higher technology, economic promotional value.
Brief description
The flow chart of accompanying drawing 1 technique designed by the present invention;
The technological process of the present invention can be found out from Fig. 1.
Detailed description of the invention
Embodiment 1
Low-grade siliceous shale navajoite (raw ore) carries out beneficiation test to Shanglou county, Shaanxi high calcium to use this method Research.V in this ore deposit2O5Grade be 0.67%, the grade 3.27% of calcium oxide, gangue mineral be mainly quartz.
Step one is classified
By crushing raw ore to below 3mm, adding water and sizing mixing, preparation ore quality percentage concentration is the slurry of 50% Carrying out washup after material, adding 800g dispersant by raw ore per ton while washup, after washup terminates, add water tune Slurry obtains the slurry that ore quality percentage concentration is 25%;Then carry out cyclone classification process, obtain sludge and thick Grain ore in sand form;In described ore deposit sludge, the grade of vanadic anhydride is 3.43 times of the grade of vanadic anhydride in raw ore, Owing to the grade of vanadium in sludge is higher, directly as vanadium concentrate;Described dispersant by calgon, waterglass, Prodan 1:1:1 in mass ratio forms;
Step 2 flotation calcium
Step one gained coarse grain ore in sand form is crushed to the particle that fineness is-0.074mm and accounts for coarse grain ore in sand form gross mass After 71.25%, add water, gangue inhibitor, calcium collecting agent, foaming agent, be made into coarse grain ore in sand form percent mass dense Degree is the slurry of 30%;Then carry out flotation, obtain calcium concentrate and select vanadium magma;The matter of calcium in described calcium concentrate Amount percentage composition is 6 times of calcium content in raw ore;Calcium concentrate can be used to neutralize during the leaching of follow-up vanadium used Acid;By observing the enriched substance on flotation froth surface, judge the process of this section of flotation, when foam is emptying, Terminate this section of flotation;Described gangue inhibitor is by calgon, waterglass, prodan 1:2:1 in mass ratio Composition, gangue inhibitor adds the ratio of 1000g to add in raw ore per ton;Described calcium collecting agent by stearic acid, Neopelex, enuatrol 1:1:1 in mass ratio forms, and calcium collecting agent adds 250g by raw ore per ton Ratio add;Described foaming agent is terpenic oil, and foaming agent adds the ratio of 30g to add in raw ore per ton;
Step 3 flotation vanadium
Using hydrochloric acid as pH adjusting agent, add it in vanadium magma, after regulation pH value to 34, add Gangue inhibitor, vanadium collecting agent, carry out flotation, obtains vanadium concentrate and tailings;Five oxidation two in described vanadium concentrate The grade of vanadium is 1.82 times of the grade of vanadic anhydride in raw ore.Described gangue inhibitor by calgon, Waterglass, prodan 1:2:1 in mass ratio forms, and gangue inhibitor adds the ratio of 300g in raw ore per ton Add;Described vanadium collecting agent is pressed by myristyl tributyl phosphorus chloride, ether amines, DTAC Mass ratio 1:1:1 forms, and vanadium collecting agent adds the ratio of 100g to add in raw ore per ton.
By above-mentioned flow process, V can be obtained2O5Grade be 2.30% sludge concentrate and grade be 1.64% floating Select vanadium concentrate, V in calcium concentrate2O5Grade is only 0.21%.Achieve from V2O5Grade be 0.67%, oxidation Calcium grade be 3.27% high calcium siliceous shale containing vanadium in propose calcium, vanadium extraction;Wherein the rate of recovery of calcium oxide is 71.39%, the overall recovery of vanadic anhydride is 76.11%.Gained mine tailing is used for building materials.Gained sludge and vanadium Concentrate is after Ore Leaching, and leachate is directly used in the preparation of vanadic anhydride, and leached mud is used for next group ore dressing. Calcium concentrate needs the acid waste liquid of discharge for processing subsequent technique.
Table 1 example 1 each stage the testing result of product
Embodiment 2
This method is used to carry out Experimental study on ore dressing to western Hunan high calcium low-grade siliceous shale navajoite (raw ore). V in this ore deposit2O5Grade be 0.70%, the grade of calcium oxide is 3.34%, gangue mineral be mainly quartz.
Step one is classified
By crushing raw ore to below 3mm, adding water and sizing mixing, preparation ore quality percentage concentration is the slurry of 55% Carrying out washup after material, adding 1100g dispersant by raw ore per ton while washup, after washup terminates, add water tune Slurry obtains the slurry that ore quality percentage concentration is 30%;Then carry out sieve classification process, obtain sludge and thick Grain ore in sand form;In described ore deposit sludge, the grade of vanadic anhydride is 3.53 times of the grade of vanadic anhydride in raw ore, Owing to the grade of vanadium in sludge is higher, directly as vanadium concentrate;Described dispersant is calgon;
Step 2 flotation calcium
Step one gained coarse grain ore in sand form is crushed to the particle that fineness is-0.074mm and accounts for coarse grain ore in sand form gross mass (after 58%, add water, gangue inhibitor, calcium collecting agent, foaming agent, be made into coarse grain ore in sand form percent mass dense Degree is the slurry of 33%;Then carry out flotation, obtain calcium concentrate and select vanadium magma;The matter of calcium in described calcium concentrate Amount percentage composition is 7.3 times of calcium content in raw ore;Calcium concentrate can be used to neutralize during the leaching of follow-up vanadium used Acid;By observing the enriched substance on flotation froth surface, judge the process of this section of flotation, when foam is emptying, Terminate this section of flotation;Described gangue inhibitor is by calgon, waterglass, prodan 1:1:1 in mass ratio Composition, gangue inhibitor adds the ratio of 800g to add in raw ore per ton;Described calcium collecting agent by stearic acid, Neopelex 1:2 in mass ratio forms, and calcium collecting agent adds the ratio of 300g to add in raw ore per ton Enter;Described foaming agent is methyl isobutyl carbinol, and foaming agent adds the ratio of 35g to add in raw ore per ton;
Step 3 flotation vanadium
Using phosphoric acid as pH adjusting agent, add it in vanadium magma, after regulation pH value to 34, add Gangue inhibitor, vanadium collecting agent, carry out flotation, obtains vanadium concentrate and tailings;Five oxidation two in described vanadium concentrate The grade of vanadium is 2.26 times of the grade of vanadic anhydride in raw ore.Described gangue inhibitor is by waterglass and fluorine Sodium metasilicate 2:1 in mass ratio forms, and gangue inhibitor adds the ratio of 300g to add in raw ore per ton;Described Vanadium collecting agent is by myristyl tributyl phosphorus chloride, ether amines, DTAC 1:1:1 in mass ratio Composition, vanadium collecting agent adds the ratio of 120g to add in raw ore per ton.
By above-mentioned flow process, V can be obtained2O5Grade be 2.47% sludge concentrate and grade be 1.58% floating Select vanadium concentrate, V in calcium concentrate2O5Grade is only 0.11%.Achieve from V2O5Grade be 0.7%, oxidation Calcium grade be 3.34% high calcium siliceous shale containing vanadium in propose calcium, vanadium extraction;Wherein the rate of recovery of calcium oxide is 79.42%, the overall recovery of vanadic anhydride is 74.35%.Gained mine tailing is used for building materials.Gained sludge and vanadium Concentrate is after Ore Leaching, and leachate is directly used in the preparation of vanadic anhydride, and leached mud is used for next group ore dressing. Calcium concentrate needs the acid waste liquid of discharge for processing subsequent technique.
Table 2 example 2 each stage the testing result of product
Embodiment 3
This method is used to carry out Experimental study on ore dressing to Guizhou high calcium low-grade siliceous shale navajoite (raw ore).This ore deposit Middle V2O5Grade be 0.73%, the grade of calcium oxide is 3.58%, gangue mineral be mainly quartz.
Step one is classified
By crushing raw ore to below 3mm, adding water and sizing mixing, preparation ore quality percentage concentration is the slurry of 60% Carrying out washup after material, adding 1500g dispersant by raw ore per ton while washup, after washup terminates, add water tune Slurry obtains the slurry that ore quality percentage concentration is 33%;Then carry out shaking table classification process, obtain sludge and thick Grain ore in sand form;In described ore deposit sludge, the grade of vanadic anhydride is 3.37 times of the grade of vanadic anhydride in raw ore, Owing to the grade of vanadium in sludge is higher, directly as vanadium concentrate;Described dispersant is by calgon and fluosilicic acid Sodium 2:1 in mass ratio forms;
Step 2 flotation calcium
Step one gained coarse grain ore in sand form is crushed to the particle that fineness is-0.074mm and accounts for coarse grain ore in sand form gross mass After 66.5%, add water, gangue inhibitor, calcium collecting agent, foaming agent, be made into coarse grain ore in sand form percent mass dense Degree is the slurry of 35%;Then carry out flotation, obtain calcium concentrate and select vanadium magma;The matter of calcium in described calcium concentrate Amount percentage composition is 6.23 times of calcium content in raw ore;Calcium concentrate can be used to neutralize during the leaching of follow-up vanadium used Acid;By observing the enriched substance on flotation froth surface, judge the process of this section of flotation, when foam is emptying, Terminate this section of flotation;Described gangue inhibitor is made up of calgon, waterglass 1:2 in mass ratio, gangue Inhibitor adds the ratio of 850g to add in raw ore per ton;Described calcium collecting agent is neopelex, Calcium collecting agent adds the ratio of 320g to add in raw ore per ton;Described foaming agent is terpenic oil, and foaming agent is by often Ton raw ore adds the ratio of 40g to add;
Step 3 flotation vanadium
Using hydrochloric acid as pH adjusting agent, add it in vanadium magma, after regulation pH value to 34, add Gangue inhibitor, vanadium collecting agent, carry out flotation, obtains vanadium concentrate and tailings;Five oxidation two in described vanadium concentrate The grade of vanadium is 2.08 times of the grade of vanadic anhydride in raw ore.Described gangue inhibitor by calgon, Waterglass, prodan 2:2:1 in mass ratio forms, and gangue inhibitor adds the ratio of 230g in raw ore per ton Add;Described vanadium collecting agent is pressed by myristyl tributyl phosphorus chloride, ether amines, DTAC Mass ratio 3:1:2 forms, and vanadium collecting agent adds the ratio of 110g to add in raw ore per ton.
By above-mentioned flow process, V can be obtained2O5Grade be 2.46% sludge concentrate and grade be 1.52% floating Select vanadium concentrate, V in calcium concentrate2O5Grade is only 0.13%.Achieve from V2O5Grade be 0.73%, oxygen Change in the high calcium siliceous shale containing vanadium that calcium grade is 3.58% and propose calcium, vanadium extraction;Wherein the rate of recovery of calcium oxide is 80.26%, the overall recovery of vanadic anhydride is 73.81%.Gained mine tailing is used for building materials.Gained sludge and vanadium Concentrate is after Ore Leaching, and leachate is directly used in the preparation of vanadic anhydride, and leached mud is used for next group ore dressing. Calcium concentrate needs the acid waste liquid of discharge for processing subsequent technique.
Table 3 example 3 each stage the testing result of product

Claims (4)

1. the method extracting vanadium from high calcium siliceous shale containing vanadium, it is characterised in that comprise the steps:
Step one is classified
By crushing raw ore to below 3mm, add water and size mixing, after carry out washup, 800-1500g dispersant is added by raw ore per ton while washup, after washup terminates, adding water sizes mixing obtain the slurry that ore quality percentage concentration is 25%-33% after carry out classification process, obtain sludge and coarse grain ore in sand form;In described raw ore, the grade of calcium oxide is more than or equal to 3.15%;The grade of vanadic anhydride is more than or equal to 0.60%;In described sludge, the grade of vanadic anhydride is 3.4-3.7 times of the grade of vanadic anhydride in raw ore;At least one in calgon, waterglass, prodan, carboxymethylcellulose calcium for the described dispersant;Calcium oxide grade in described raw ore is 3.15-4.55%;The grade of vanadic anhydride is 0.60-0.80%;
Step 2 flotation calcium
After step one gained coarse grain ore in sand form is crushed to the 55-75% that the particle that fineness is-0.074mm accounts for coarse grain ore in sand form gross mass, adds water, gangue inhibitor, calcium collecting agent, foaming agent, be made into the slurry that coarse grain ore in sand form mass percentage concentration is 30-35%;Then carry out flotation, obtain calcium concentrate and select vanadium magma;In described calcium concentrate, the grade of calcium oxide is 5-7.5 times of calcium oxide grade in raw ore;
Gangue inhibitor adds the ratio of 800 1000g to add in raw ore per ton;At least one in calgon, waterglass, prodan for the described gangue inhibitor;
Calcium collecting agent adds the ratio of 200 320g to add in raw ore per ton;At least one in stearic acid, neopelex, enuatrol for the described calcium collecting agent;
Foaming agent adds the ratio of 30-40g to add in raw ore per ton;At least one in terpenic oil, methyl isobutyl carbinol for the described foaming agent;
Step 3 flotation vanadium
Toward selecting addition pH adjusting agent in vanadium magma, after regulation pH value to 34, add gangue inhibitor, vanadium collecting agent, carry out flotation, obtain vanadium concentrate and tailings;In described vanadium concentrate, the grade of vanadic anhydride is 1.8 2.4 times of the grade of vanadic anhydride in raw ore;
The described method extracting vanadium from high calcium siliceous shale containing vanadium, the overall recovery of calcium is 70 82%, and the overall recovery of vanadium is more than or equal to 73%;
Mine tailing accounts for the 60 65% of raw ore gross mass;
Described vanadium collecting agent is selected from myristyl tributyl phosphorus chloride, ether amines, DTAC, in mass ratio myristyl tributyl phosphorus chloride: ether amines: DTAC=1:1:1 composition.
2. a kind of method extracting vanadium from high calcium siliceous shale containing vanadium according to claim 1, it is characterised in that: classification described in step one processes the one in cyclone classification, sieve classification, shaking table classification.
3. a kind of method extracting vanadium from high calcium siliceous shale containing vanadium according to claim 1, it is characterised in that: in step 3,
Gangue inhibitor adds the ratio of 200 300g to add in raw ore per ton;
Vanadium collecting agent adds the ratio of 80 120g to add in raw ore per ton.
4. a kind of method extracting vanadium from high calcium siliceous shale containing vanadium according to claim 1, it is characterised in that: in step 3, at least one in phosphoric acid, hydrochloric acid for the described pH adjusting agent.
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