CN101215647B - Roasting technique for extracting vanadium from stone coal vanadium ore - Google Patents
Roasting technique for extracting vanadium from stone coal vanadium ore Download PDFInfo
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- CN101215647B CN101215647B CN2008100304980A CN200810030498A CN101215647B CN 101215647 B CN101215647 B CN 101215647B CN 2008100304980 A CN2008100304980 A CN 2008100304980A CN 200810030498 A CN200810030498 A CN 200810030498A CN 101215647 B CN101215647 B CN 101215647B
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Abstract
A roasting process extracts vanadium from bone coal vanadium ore. The invention comprises primarily bruising bone coal raw materials, mixing ore material with calcium salt, balling after mixing calcium salt with 5-15% ore, disintegrating mixed ore powder to 100 meshes which are larger or equal to 80%, then making into pellets whose diameter is 10mm as roasting raw materials or directly using ore powder which is obtained through balling as roasting raw materials, conducting two stage roasting by adopting a digital control muffle furnace, wherein one stage roasting temperature is 700-800 DEG C, heat preservation time is 1-2h, and the oxygen is full in the furnace, the second stage roasting temperature is kept between 850 DEG C and 950 DEG C, heat preservation time is 2-5h, and the atmosphere furnace is lack of oxygen. The roasting is atmospherically leached under diluted acid, and the leaching rate of vanadic anhydride in the invention can reach over 82%.
Description
Technical field
The present invention relates to from the bone coal ore deposit, extract the sinter process that Vanadium Pentoxide in FLAKES adopted.
Background technology
Bone coal ore deposit, China south is distributed more widely general, and it is V in China's vanadium titano-magnetite that the bone coal reserves are 61,818 hundred million tons
2O
5217 times of reserves.Therefore, vanadium extraction becomes the important development direction that China utilizes vanadium resource from bone coal.The discovery in bone coal ore deposit impels process for extracting vanadium from stone coal also in constantly improving, and traditional sodium-salt calcination method transformation efficiency is higher, but the chlorine and the hydrogenchloride serious environment pollution that produce.Present sinter process is considered and can be divided into from additive: (1) calcium salt additive; (2) salt, calcium salt binary additive; (3) no chlorine multielement additive; (4) saltless roasting method.Wherein saltless roasting method leaching yield is generally lower.
Summary of the invention
From the bone coal ore deposit, extract Vanadium Pentoxide in FLAKES roasting system and be broadly divided into one section converter roasting and the roasting of two sections branch stoves.The invention is intended to form a kind of novel roasting system on the basis of convenient and energy-saving, improve the conversion leaching yield of Vanadium Pentoxide in FLAKES.
Purpose of the present invention aims to provide a kind of sinter process of vanadium extraction from bone coal navajoite, can control roasting process effectively, improve leaching yield, whole prepared is simple and convenient energy-conservation, the more important thing is that technology of the present invention can meet environmental protection requirement preferably.
The objective of the invention is to realize by following manner:
Technology of the present invention is: with the fragmentation of bone coal raw ore, add the calcium salt of ore weight 5～15%, wear into breeze directly as the roasting raw material or with breeze system ball as the roasting raw material; The roasting raw material is carried out two-segment calcining: first section roasting is at 700 ℃～800 ℃, and air draught speed is 10～60L/min during roasting, and soaking time is 1～2h; Second section roasting then is after first section roasting, continues to heat up to arrive 850～950 ℃ of second section maturing temperatures, and the gas velocity of air is 1～20L/min during roasting, and soaking time is 2～5h; Grog ball or powdery calcining that roasting is obtained grind respectively, carry out stirring at normal temperature with diluted acid and leach.
The fragmentation of described bone coal raw ore is to adopt pair roller to be crushed to be no less than 80% ore to 100 order.
The particle diameter of described breeze system ball is 8-12mm.
Described first section roasting and second section roasting are all carried out in same numerical control retort furnace.
Be to carry out stirring at normal temperature under 3～5% the acid to leach with mass concentration, extraction time is preferably 2～3h.
Specific embodiment of the present invention is as follows:
1 former material is prepared
1.
The bone coal primary sample of the difference mining point that will gather from the mine mixes by a certain percentage, makes wherein vanadium (in Vanadium Pentoxide in FLAKES) content 〉=0.6%.---Da E fragmentation---the Xiao E fragmentation of passing through hand-crushed respectively.
2. allocate the calcium salt of ore amount 5～15% into, after mixing, adopt pair roller to be crushed to 100 orders 〉=80%.With one group of system of the breeze ball that obtains, particle diameter is about 10mm, oven dry; Other one group of sample is directly got breeze.
2 roastings
According to the characteristics in bone coal ore deposit, the above-mentioned roasting raw material that obtains adopts the numerical control retort furnace to carry out the control of two-stage roasting technology realization to the roasting system.Roasting one segment process: oxidation and decarbonization; Roasting two step process: form easy molten vanadium compound.
1. first section roasting
The roasting raw material is put into the numerical control retort furnace, heat up then and carry out first section roasting, processing condition are: maturing temperature is 700 ℃～800 ℃, and soaking time is 1～2h.The control furnace atmosphere is (an oxygen abundance), makes the abundant oxygenolysis of carbon and organism.Air draught speed is 10～60L/min during roasting.
2. second section roasting
Material after first section roasting in former High Temperature Furnaces Heating Apparatus, is arrived 850～950 ℃ of second section maturing temperatures to heat up again, and strict control furnace atmosphere condition is anoxic (partial pressure of carbon dioxide is more than or equal to oxygen partial pressure), and soaking time is 2～5h.The gas velocity of air is 1～20L/min during roasting.
3 low acidleach go out
Grog ball or powdery calcining that roasting is obtained grind respectively, are to carry out stirring at normal temperature under 3～5% diluted acids to leach in mass concentration, and extraction time is 2～3h.
The roasting material that aforesaid method obtains is used for the low acidleach of normal temperature and goes out vanadium extraction, and the Vanadium Pentoxide in FLAKES leaching yield reaches more than 82% in the calcining.
The present invention is by control oxygen-enriched atmosphere in stove during first section roasting, guarantees charcoal and the decomposition of organic complete oxidation in the slag after one section roasting.And in stove, carry out two-stage roasting, can make full use of the carbon dioxide atmosphere that one section roasting forms, need not the other air inlet of follow-up roasting.
Described system ball is with directly the resulting Vanadium Pentoxide in FLAKES leaching yield of powdery roasting is basic identical.
The present invention contains technological difficulties the scherbinaite colliery oxidizing roasting process from solution, study mutually by the thing that high temperature is existed down, roasting system to the roasting material is controlled, comprise the control of roasting stage and calcination atmosphere, realized vanadium to easy molten conversion of compounds, remarkable effect has been arranged improving leaching yield.In addition, this sinter process has tangible fixed action to the sulphur in the mineral, and the extract technology convenient and energy-saving, has embodied the requirement of novel environment friendly technical matters.
Specific embodiment
Following examples are intended to illustrate the present invention rather than limitation of the invention further.
Embodiment 1:
Somewhere, Hunan three ore deposit point bone coals mixing sample ore (I) has carried out the rock-mineral determination analysis to three sample ores, and each sample has ground two mating plates and two thin slices respectively.The rock-mineral determination analytical results shows that the character of three sample ores is close, and the essential mineral of ore has: based on the clay mineral of kaolinite, illite, organic carbonaceous, quartz (fragmental quartz, electroless plating quartz, keatite); Less important mineral have pyrite, barite; Trace quantity mineral has psilomelane, covellite, alpha chalcocite, chalcopyrite, zink sulphide, fragmental white mica, sericite, chlorite, anhydrite, rutile, leucoxene, zircon etc.Do not see clear and definite vanadium minerals.
Sampling 20kg, Vanadium Pentoxide in FLAKES theoretical content 1.2% all is crushed to 2～3mm, adds to carry out ball milling to 100 order after calcium salt mixes)=80%.With the breeze part system ball that obtains, particle diameter is about 10mm, oven dry.
Roasting adopts the numerical control retort furnace to carry out the two-segment calcining system, will make ball material and pulverulent material and go into the stove roasting respectively.2h is warming up to first section maturing temperature, temperature is selected 750 ℃ ± 50 ℃, and the roasting soaking time is 1h, and gas velocity is 10～60L/min during roasting, this section guarantees fully decarburization of material, guarantees that simultaneously the part calcium carbonate of decomposition earlier can be fixed the sulphur that the sulfurous iron ore decomposition produces under this temperature.Enter second section roasting: 0.5h and be warming up to 900 ℃, gas velocity is 1～20L/min during roasting, insulation 3h, quenching in the air afterwards.Ball material calcining being ground, get 100g, is that 4% dilute sulphuric acid leaches with concentration, leaches liquid-solid ratio 2: 1, agitation leach 3h at normal temperatures, and after the solid-liquid separation, the leaching yield that detects Vanadium Pentoxide in FLAKES in the leach liquor is 83.35%.
Embodiment 2
Get above-mentioned mixing sample ore (I), directly use powdery charging roasting through preliminary fragmentation with after adding the calcium salt ball milling, the roasting system is identical with example 1, with the powdery calcining is that 4% diluted acid leaches with concentration directly, leached liquid-solid ratio 2: 1, agitation leach 3h at normal temperatures, after the solid-liquid separation, the leaching yield that detects Vanadium Pentoxide in FLAKES in the leach liquor is 82.77%.
Claims (5)
1. the roasting method of a vanadium extraction from bone coal navajoite is characterized in that, with the fragmentation of bone coal raw ore, adds the calcium salt of ore weight 5～15%, wear into breeze directly as the roasting raw material or with breeze system ball as the roasting raw material; The roasting raw material is carried out two-segment calcining: first section roasting is at 700 ℃～800 ℃, and air draught speed is 10～60L/min during roasting, and soaking time is 1～2h; Second section roasting then is after first section roasting, continues to heat up to arrive 850～950 ℃ of second section maturing temperatures, and the gas velocity of air is 1～20L/min during roasting, and soaking time is 2～5h; Grog ball or powdery calcining that roasting is obtained grind respectively, carry out stirring at normal temperature with diluted acid and leach.
2. the roasting method of a kind of vanadium extraction from bone coal navajoite according to claim 1 is characterized in that, the fragmentation of described bone coal raw ore is to adopt pair roller to be crushed to be no less than 80% ore to 100 order.
3. the roasting method of a kind of vanadium extraction from bone coal navajoite according to claim 1 is characterized in that, the particle diameter of described breeze system ball is 8-12mm.
4. the roasting method of a kind of vanadium extraction from bone coal navajoite according to claim 1 is characterized in that, described first section roasting and second section roasting are all carried out in same numerical control retort furnace.
5. the roasting method of a kind of vanadium extraction from bone coal navajoite according to claim 1 is characterized in that, is that 3～5% acid is carried out stirring at normal temperature and leached with mass concentration, and extraction time is 2～3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100304980A CN101215647B (en) | 2008-01-16 | 2008-01-16 | Roasting technique for extracting vanadium from stone coal vanadium ore |
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| CN2008100304980A CN101215647B (en) | 2008-01-16 | 2008-01-16 | Roasting technique for extracting vanadium from stone coal vanadium ore |
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| CN101215647A CN101215647A (en) | 2008-07-09 |
| CN101215647B true CN101215647B (en) | 2010-06-09 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101507949B (en) * | 2009-03-19 | 2013-08-21 | 株洲市湘麒科技开发有限公司 | Stone-like coal navajoite physical mineral dressing method |
| CN101880764A (en) * | 2010-08-11 | 2010-11-10 | 唐山奥特斯科技有限公司 | Process for roasting stone coal vanadium ore by tunnel car bottom furnace |
| CN102534190A (en) * | 2012-01-20 | 2012-07-04 | 彭武星 | Three-section type heating and roasting method for refining vanadium pentoxide |
| CN102627325B (en) * | 2012-04-25 | 2014-04-09 | 彭武星 | Method for re-decarburizing and roasting vanadium-containing stone coal decarburized materials by using rotary kiln |
| CN103308468B (en) * | 2013-05-24 | 2015-05-20 | 武汉理工大学 | Method for analyzing chemical phases of vanadium in stone coal |
| CN103993161B (en) * | 2014-05-21 | 2016-11-16 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of the two-part calcification baking of vanadium-containing material |
| CN104531989A (en) * | 2014-12-22 | 2015-04-22 | 核工业北京化工冶金研究院 | Method for reducing leaching acid consumption and impurity dissolution rate of high-acid-consumption vanadium ore |
| CN105603177B (en) * | 2016-03-04 | 2018-01-16 | 中钢集团鞍山热能研究院有限公司 | A kind of method and device of colm vanadium extraction oxygen-enriched air roasting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184162A (en) * | 1996-12-06 | 1998-06-10 | 湖南省安化县东坪钒冶炼厂 | Vanadium pentoxide extracting method from stone coal vanadium ore |
| CN1974409A (en) * | 2006-12-15 | 2007-06-06 | 张伟峰 | Process of extracting vanadium pentoxide from stone coal |
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- 2008-01-16 CN CN2008100304980A patent/CN101215647B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184162A (en) * | 1996-12-06 | 1998-06-10 | 湖南省安化县东坪钒冶炼厂 | Vanadium pentoxide extracting method from stone coal vanadium ore |
| CN1974409A (en) * | 2006-12-15 | 2007-06-06 | 张伟峰 | Process of extracting vanadium pentoxide from stone coal |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2002-180145A 2002.06.26 |
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Granted publication date: 20100609 Termination date: 20120116 |