CN107815534A - The preprocess method of raw material vanadium slag in process for extracting vanadium - Google Patents
The preprocess method of raw material vanadium slag in process for extracting vanadium Download PDFInfo
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- CN107815534A CN107815534A CN201710996041.4A CN201710996041A CN107815534A CN 107815534 A CN107815534 A CN 107815534A CN 201710996041 A CN201710996041 A CN 201710996041A CN 107815534 A CN107815534 A CN 107815534A
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- vanadium
- vanadium slag
- preprocess method
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- slag
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
Abstract
The present invention relates to the preprocess method of raw material vanadium slag in process for extracting vanadium, belongs to vanadium extractive technique field.The technical problems to be solved by the invention are to provide the preprocess method of raw material vanadium slag in process for extracting vanadium, and this method comprises the following steps：A, vanadium slag crushes；B, it is dry-mixed：The broken powder that step a is obtained is well mixed with roasting additive and solid binder；C, wet mixing：The compound for adding water uniform wet step b to obtain；D, it is compressing：The material that step c is obtained is compressing；E, drying.Vanadium extraction raw material is pre-processed using the inventive method, the uniformity of material before roasting can be substantially improved, solves the problems such as roasting bonds, treatment effeciency is low, conversion ratio is low.
Description
Technical field
The present invention relates to the preprocess method of raw material vanadium slag in process for extracting vanadium, belongs to vanadium extractive technique field.
Background technology
During Leaching of Vanadium from Vanadium slag (including vanadium slag sodium, calcification vanadium extraction, vanadium chromium slag vanadium extraction chromium), no matter roasted using calcification
Burn or sodium roasting, because having the release of the unstable heat in part (e.g., the oxidation of metallic iron) and low melting point in its roasting process
The generation of material, roasting are commonly present materials from bonding, and the working of a furnace is poor, it is difficult to which continuous service, processing intensity is big, and roasting conversion rate is low, needs
Will be with addition of inertia returning charge the problems such as.
CN103898315A discloses a kind of method of pelletizing vanadium slag roasting, the described method comprises the following steps：A. divide
Sodium salt additive, binding agent are not added to the water and are configured to viscous aqueous solution；B. by vanadium slag it is broken and will it is broken after vanadium slag with
The viscous aqueous solution is mixed to get compound, and the compound is pressed into pelletizing；C. the pelletizing is subjected to high-temperature roasting
Obtain clinker, by the chamotte crushing and will it is broken after clinker gone out with water logging, obtain containing vanadium leachate after filtering.This method exists
When ideally implementing completely, estimated effect can be reached, but the above method is first to add roasting additive, binding agent
Enter in water, during wet mixing, because solution viscosity is very strong, mixing process is easily agglomerating, causes the dispensing of balling-up material uneven,
Influence roasting conversion rate.
Therefore, the roasting effect of vanadium extraction material how is further improved, becomes urgent problem to be solved.
The content of the invention
It is an object of the invention to provide the preprocess method of raw material vanadium slag in process for extracting vanadium.
The invention provides the preprocess method of raw material vanadium slag in process for extracting vanadium, comprise the following steps：
A, vanadium slag crushes；
B, it is dry-mixed：The broken powder that step a is obtained is well mixed with roasting additive and solid binder；
C, wet mixing：The compound for adding water uniform wet step b to obtain；
D, it is compressing：The material that step c is obtained is compressing；
E, drying.
Further, vanadium slag is crushed to more than 80%w/w material and crosses 120 mesh sieves.
The heat that the thinner vanadium slag of granularity discharges in roasting process is bigger, and roasting effect is more difficult to be guaranteed.This hair
By powder pressing into pelletizing, the heat discharged in roasting process reduces bright method, is easily controlled, therefore is especially suitable for processing granularity
Thin vanadium slag.
Further, described solid binder is one or two kinds of in corn dextrin, cellulose, bentonite or sodium metasilicate
Mixture above.
Wherein, the species of the roasting additive and ratio are defined by former process for extracting vanadium.Such as, vanadium slag sodium roasting vanadium-extracting work
Skill need to add 25% or so sodium carbonate.
Further, the addition of wet mixing step reclaimed water is the 0~10% of vanadium slag weight.
Wherein, if the addition of water can influence the compressing of material more than 10%.
Preferably, the addition of water is the 6% of vanadium slag weight.
Further, it is additionally added liquid-containing binder in wet mixing step.
The liquid-containing binder is as long as there is caking property and is in alkalescence, such as, waterglass, organic or inorganic can be selected
Glue.
Further, the dosage of the solid binder is the 0~10% of vanadium slag weight.
Preferably, the dosage of the solid binder is the 2~10% of vanadium slag weight.
Further, the solid binder and the total amount of liquid-containing binder are the 0~10% of vanadium slag weight.
Preferably, the solid binder and the total amount of liquid-containing binder are the 2~10% of vanadium slag weight.
Wherein, if using organic binder bond, such as corn dextrin, cellulose, heat release after burning, dosage can show when being more than 10%
Writing influences roasting stability；If using inorganic binder, such as bentonite, sodium metasilicate, dosage can increase the quantity of slag when being more than 10%.
Further, pressing pressure is controlled in 1~10MPa in step d.
Preferably, pressing pressure control is in 5~10MPa.
In the step d, the mold shape of former used can be for spherical, oval, polygon, honeycombed etc. wherein
It is any one or more of, and be not excluded for the possibility using other shapes.
Anti-drop intensity >=the 1m of wet block that the step d is obtained.
Wet block thickness range 3mm~100mm that the step d is obtained.
Further, the drying steps are dried under conditions of temperature is not higher than 300 DEG C.
Wherein, if temperature is higher than 300 DEG C, binding agent can react at high temperature, lose bond effect.
Preferably, drying temperature is 100~200 DEG C.
Further, moisture≤2%w/w in material after drying.
Wherein, if moisture is higher than 2%w/w, the intensity decreases of molding mass, and the water of roasting process evaporation can be caused
It can raise, be unfavorable for reducing production cost.
Wherein, the anti-drop intensity >=2m of dry block obtained after drying.
Further, the raw material vanadium slag is the solid material by roasting vanadium extraction.
Further, the raw material vanadium slag is vanadium slag sodium process for extracting vanadium, vanadium slag calcification vanadium extraction skill or vanadium chromium slag vanadium extraction chromium
The raw material of technique.
Further, SiO is also contained in addition to vanadium in the raw material vanadium slag2、Al2O3, it is a kind of in MnO, MgO or ferro element or
Two or more compositions.
The invention provides the preprocess method of raw material vanadium slag in process for extracting vanadium, vanadium extraction raw material is carried out using this method pre-
Processing, the uniformity of material before roasting can be substantially improved, solve the problems such as roasting bonds, treatment effeciency is low, conversion ratio is low.It is real
Test result to show, after the inventive method is pre-processed, the roasting conversion rate of vanadium can reach more than 89%, the roasting of vanadium extraction material
Effect is burnt to be obviously improved.Present invention process is easy to use, equipment requirement is low, easy to operate, wide adaptation range, cost
It is low, there is good Social benefit and economic benefit.
Embodiment
The raw material that is used in the specific embodiment of the invention, equipment are known product, are obtained by buying commercially available prod.
The invention provides the preprocess method of raw material vanadium slag in process for extracting vanadium, comprise the following steps：A, vanadium slag crushes；b、
It is dry-mixed：The broken powder that step a is obtained is well mixed with roasting additive and solid binder；C, wet mixing：Water is added uniformly to moisten
The compound that wet step b is obtained；D, it is compressing：The material that step c is obtained is compressing；E, drying.
The present invention suppresses vanadium extraction raw material to obtain the preferable ball of mouldability by selecting suitable binding agent and pressing parameter
Group, so as to solve the problems such as roasting bonds, conversion ratio is low, improve the roasting conversion rate of vanadium.
Wherein, inventor is had found by investigating, and pressure is not the bigger the better in pressing process：When pressing pressure is more than
During 10MPa, not only not easy-formation, can also make molding mass so dense, influence roasting oxidation effect on the contrary.If in addition, pressing pressure
It is too small, molding mass low intensity, it is easily broken, can also influences roasting oxidation effect.Therefore, by by pressing pressure control 1~
10MPa, anti-drop intensity >=1m, and the preferable pelletizing of roasting effect can be obtained.
Further, the present invention is calcined again after wet bulb is dried, and can be avoided in roasting process because moisture drastically dissipates
Lose and cause the explosion of ball, form powder, bond the working of a furnace, further improve roasting effect.
For the improvement of fully checking the inventive method, 4 oven tests, vanadium slag master used have been carried out with vanadium slag respectively
Chemical composition is wanted to be shown in Table 1, wherein Examples 1 and 2 employ the preprocessing method of raw materials of the present invention, and comparative example 1 and 2 is not use
The preprocessing method of raw materials.It is described in detail below：
The main chemical compositions of the experiment vanadium slag of table 1
Embodiment 1 carries out sodium roasting again after being pre-processed using the inventive method to raw material vanadium slag
100g fine powders vanadium slag (- 120 mesh accounting 83.74%w/w) is taken, the pure sodium carbonate of 25g anhydrous assays is added, adds 2g
Corn dextrin binding agent, it is fitted into 500ml blenders, dry-mixed 120min.Take 6ml water to be uniformly sprayed in compound again, obtain
Wet compound.With diameter 10mm mould, under 5MPa press devices, wet compound is pressed into 3mm thin slices.100 DEG C of bakings
60min to moisture 0.25%w/w, is placed in Muffle furnace, in 800 DEG C of oxidizing roasting 120min, finally obtains vanadium slag oxidation
Sodium salt roasting clinker.After testing, soap-free emulsion polymeization, clinker TV=7.42%, SV (content of water-soluble vanadium)=6.68%, the roasting of vanadium are calcined
It is 90.03% to burn conversion ratio.
Embodiment 2 carries out calcification baking again after being pre-processed using the inventive method to raw material vanadium slag
100g fine powders vanadium slag (- 120 mesh accounting 83.74%w/w) is taken, 10g anhydrous assay carbonate-free limes is added, adds
10g cellulose binders, it is fitted into 500ml blenders, dry-mixed 120min.Take 6ml water to be uniformly sprayed in compound again, obtain
Wet compound.With diameter 10mm mould, under 10MPa press devices, wet compound is pressed into 5mm thin slices.200 DEG C of bakings
50min to moisture 0.14%w/w, is placed in Muffle furnace, in 980 DEG C of oxidizing roasting 120min, finally obtains vanadium slag oxidation
Calcification baking clinker.After testing, roasting soap-free emulsion polymeization, clinker TV=8.35%, V5+ (contents of+5 valency vanadium)=7.46%, vanadium
Roasting conversion rate is 89.33%.
The raw material vanadium slag of comparative example 1 is not preprocessed directly to carry out sodium roasting
100g fine powders vanadium slag (- 120 mesh accounting 83.74%w/w) is taken, the pure sodium carbonate of addition 25g anhydrous assays loads 500ml
In blender, it is placed directly within after dry-mixed 120min in Muffle furnace, in 800 DEG C of oxidizing roasting 120min, finally obtains vanadium slag oxidation
Sodium salt roasting clinker.After testing, materials from bonding is serious, clinker TV=7.21%, SV=5.78%, and the roasting conversion rate of vanadium is
80.17%.
The raw material vanadium slag of comparative example 2 is not preprocessed directly to carry out calcification baking
100g fine powders vanadium slag (- 120 mesh accounting 83.74%w/w) is taken, adds 10g anhydrous assay carbonate-free limes, is loaded
In 500ml blenders, it is placed in after dry-mixed 120min in Muffle furnace, in 980 DEG C of oxidizing roasting 120min, finally obtains vanadium slag oxidation
Calcification baking clinker.After testing, material is hardened, clinker TV=8.41%, V5+=6.81%, and the roasting conversion rate of vanadium is
80.97%.
Contrast it is visible, the present invention by by vanadium slag and roasting additive, binding agent and water it is compressing after carry out high temperature again
It is calcined, the adhesion problem that vanadium slag can either be avoided to occur in roasting process, improves the roasting conversion rate of vanadium again.
Claims (10)
1. the preprocess method of raw material vanadium slag in process for extracting vanadium, it is characterized in that：Comprise the following steps：
A, vanadium slag crushes；
B, it is dry-mixed：The broken powder that step a is obtained is well mixed with roasting additive and solid binder；
C, wet mixing：The compound for adding water uniform wet step b to obtain；
D, it is compressing：The material that step c is obtained is compressing；
E, drying.
2. preprocess method as claimed in claim 1, it is characterized in that：The material that vanadium slag is crushed to more than 80%w/w crosses 120 mesh
Sieve.
3. preprocess method as claimed in claim 1, it is characterized in that：Described solid binder be corn dextrin, cellulose,
One or more kinds of mixture in bentonite or sodium metasilicate.
4. preprocess method as claimed in claim 1, it is characterized in that：The addition of wet mixing step reclaimed water is the 0 of vanadium slag weight
~10%；Preferably, the addition of water is the 6% of vanadium slag weight.
5. preprocess method as claimed in claim 1, it is characterized in that：Liquid-containing binder is additionally added in wet mixing step.
6. preprocess method as claimed in claim 1, it is characterized in that：The dosage of the solid binder is the 0 of vanadium slag weight
~10%；Preferably, the dosage of the solid binder is the 2~10% of vanadium slag weight.
7. preprocess method as claimed in claim 5, it is characterized in that：The solid binder and the total amount of liquid-containing binder are
The 0~10% of vanadium slag weight；Preferably, the solid binder and the total amount of liquid-containing binder are the 2~10% of vanadium slag weight.
8. preprocess method as claimed in claim 1, it is characterized in that：Pressing pressure control is in 1~10MPa in step d；It is preferred that
Ground, pressing pressure are controlled in 5~10MPa.
9. preprocess method as claimed in claim 1, it is characterized in that：The drying steps meet at least one of following：
Dried under conditions of temperature is not higher than 300 DEG C；
Preferably, drying temperature is 100~200 DEG C；
Moisture≤2%w/w in material after drying.
10. preprocess method as claimed in claim 1, it is characterized in that：The raw material vanadium slag meets at least one of following：
The raw material vanadium slag is the solid material by roasting vanadium extraction；
The raw material vanadium slag is the raw material of vanadium slag sodium process for extracting vanadium, vanadium slag calcification vanadium extraction skill or vanadium chromium slag vanadium extraction chromium process；
In the raw material vanadium slag in addition to vanadium, also contain SiO2、Al2O3, in MnO, MgO or ferro element it is one or more kinds of into
Point.
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| CN201710996041.4A CN107815534A (en) | 2017-10-23 | 2017-10-23 | The preprocess method of raw material vanadium slag in process for extracting vanadium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480832A (en) * | 2021-12-03 | 2022-05-13 | 万循材料科技有限公司 | Vanadium extraction pretreatment and roasting treatment method for vanadium-containing petroleum slag |
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| CN105018734A (en) * | 2015-08-06 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for synchronously separating iron, vanadium and manganese in vanadium extracting tailings |
| CN105018721A (en) * | 2015-08-06 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, vanadium and titanium from vanadium-titanium magnetite |
| CN105886755A (en) * | 2016-04-18 | 2016-08-24 | 华南理工大学 | Low-grade vanadium titano-magnetite oxidized pellet expansion restraining and upgrading process for gas-based shaft furnace |
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2017
- 2017-10-23 CN CN201710996041.4A patent/CN107815534A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102703688A (en) * | 2012-05-07 | 2012-10-03 | 河北钢铁股份有限公司承德分公司 | Method for recovering vanadium in vanadium-titanium magnetite ore |
| CN105018734A (en) * | 2015-08-06 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for synchronously separating iron, vanadium and manganese in vanadium extracting tailings |
| CN105018721A (en) * | 2015-08-06 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, vanadium and titanium from vanadium-titanium magnetite |
| CN105886755A (en) * | 2016-04-18 | 2016-08-24 | 华南理工大学 | Low-grade vanadium titano-magnetite oxidized pellet expansion restraining and upgrading process for gas-based shaft furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480832A (en) * | 2021-12-03 | 2022-05-13 | 万循材料科技有限公司 | Vanadium extraction pretreatment and roasting treatment method for vanadium-containing petroleum slag |
| CN114480832B (en) * | 2021-12-03 | 2024-04-26 | 万循材料科技有限公司 | Pretreatment and roasting treatment method for extracting vanadium from vanadium-containing Dan Youzha |
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Application publication date: 20180320 |