CN101161831A - Calcification vanadium slag sintering method - Google Patents
Calcification vanadium slag sintering method Download PDFInfo
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- CN101161831A CN101161831A CNA2007102024458A CN200710202445A CN101161831A CN 101161831 A CN101161831 A CN 101161831A CN A2007102024458 A CNA2007102024458 A CN A2007102024458A CN 200710202445 A CN200710202445 A CN 200710202445A CN 101161831 A CN101161831 A CN 101161831A
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- roasting
- vanadium slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a method of vanadium slag direct entering high temperature roasting furnace calcify roasting, that is, high calcium vanadium slag or ordinary vanadium slag and lime or limestone are mixed uniformly without the gradual heating up process from low temperature to high temperature, the mixture enters into the roasting furnace of more than 600 DEG C for calcified roasting., the vanadium of the vanadium slag is changed into vanadium acid calcium, vanadium of the roasting clinker is dissolved into the solution under the leaching function of sulphuric acid solution, vanadium oxide and the like vanadium products are further made. The invention needs no gradual heating up process from low temperature to high temperature of the prior sodium treatment roasting, thereby reducing roasting time, improving productivity of unit and reducing production cost.
Description
Technical field
The present invention relates to a kind of method of calcification vanadium slag sintering, particularly vanadium slag directly enters the method for high-temperature roasting stove calcification baking.
Background technology
Vanadium slag is a kind of vanadium enrichment material that blows out from vanadium-bearing hot metal with oxygen-containing gass such as oxygen or oxygen-rich air.The enterprise that with the vanadium titano-magnetite is raw material production iron, vanadium product all adopts products such as traditional vanadium slag sodium roasting, water logging vanadium extraction explained hereafter vanadium oxide, vanadium iron, vanadium nitride usually, the steel of climbing as China, hold steel, Muscovite Nizhni Tagil, Qiu Suofu Steel Complex etc. takes blast furnace, converter to blow vanadium, converter steelmaking flow process; Sea, South Africa Wilder, New Zealand Steel Ltd. etc. take rotary kiln reduction, the molten branch of electric furnace, molten iron to blow vanadium, semi-steel making flow process.
Traditional sodium roasting, water logging vanadium extraction processing requirement vanadium slag are since 200 ℃～300 ℃ low temperature elevated temperature to 760 ℃～850 ℃ progressively, and roasting time is usually at 2h～5h.This is because vanadium slag in the sodium roasting process, need will be wrapped in the vanadic spinel fayalite phase oxidation of outside mutually in low-temperature zone, so that spinel contacts with oxygen.Yet well-known, improve the speed that temperature of reaction can be accelerated chemical reaction greatly, the roasting of vanadium slag is no exception.But for sodium roasting, too fast from low temperature to the pyritous heat-up rate, perhaps make vanadium slag and sodium salt additive directly enter the high-temperature zone and carry out roasting, tend to occur liquid phase, the intergranular space of vanadium slag particle and sodium salt is reduced, hinder the diffusion of oxygen, can reduce the commentaries on classics of vanadium and soak rate, therefore the temperature control system of sodium roasting all is to adopt 200 ℃～300 ℃ low temperature to go into stove (also having minority to go into stove about 400 ℃) usually, and progressively elevated temperature carries out roasting.
Calcification baking is to be raw material with the vanadium slag, adds lime and carries out roasting, makes the vanadium in the vanadium slag change vanadic acid calcium into, and the roasting grog makes the vanadium dissolving enter leach liquor molten the soaking of vitriolic under the effect, and then produces vanadium product such as barium oxide.Russia Tula factory reported once that adopting calcification baking one sulfuric acid to leach produces the vanadium product, also continued to use the low temperature of sodium roasting and goes into stove, the temperature control system that progressively heats up such during roasting.
Consult the document result and show, do not see to have directly to make to contain the vanadium material carries out roasting directly into the high-temperature roasting stove patent or report.
Summary of the invention
The method that the purpose of this invention is to provide a kind of direct high temperature calcification vanadium slag sintering makes the vanadium slag roasting process not need progressively slowly to be warmed up to high temperature from low temperature, thereby shortens roasting time, improves the unit production capacity, reduces production costs.
The present invention is achieved through the following technical solutions:
With CaO and V
2O
5Weight ratio is that 0.5～0.7 vanadium slag is in 600 ℃～950 ℃ roasting kiln roastings.
Described vanadium slag is the CaO/V that satisfies of the direct blowing of vanadium extraction production process
2O
5=0.5～0.7 high calcium vanadium slag is perhaps for making it satisfy CaO/V behind the calcium containing compounds such as common vanadium slag interpolation lime or Wingdale
2O
5=0.5～0.7; Need be crushed to particle diameter before the vanadium slag roasting less than 0.125mm, wherein 95% particle is less than 0.1mm.
Stoving oven is rotary kiln, multiple hearth furnace, shaft furnace or fluidizing furnace; Vanadium slag stirs roasting 30min～150min under the state at stoving oven.
Rotary kiln or multiple hearth furnace maturing temperature optimum range are: 600 ℃～950 ℃; Boiling roaster temperature optimum range is: 850 ℃～950 ℃.
Behind the water furnishing slip of the roasting grog that obtains after the roasting with 1～4 times of its weight ratio, adding concentration again and be 32%～65% sulfuric acid regulates slip pH and leaches, keep the pH value of leaching process to be controlled at 2.8～3.3 scopes, 45～65 ℃ of temperature, time 30～90min.
The invention has the beneficial effects as follows: without the process that from low temperature to high temperature, progressively heats up, but directly enter the roasting of high-temperature roasting stove during the vanadium slag roasting, make the easier control of temperature of stoving oven, and can shorten roasting time, improve the production capacity of equipment.
Embodiment
The invention will be further elaborated below in conjunction with embodiment.Embodiment only is used to illustrate the present invention, rather than limits the present invention by any way.
The roasting experiment of embodiment 1 vanadium slag in retort furnace
Vanadium slag (is contained V
2O
515.43%, CaO＜0.5%) was crushed to the 0.1mm screen cloth.Get the vanadium slag after the 100g fragmentation, add 7.72g lime, mix and install stand-by with porcelain crucible.
Retort furnace is warming up to 900 ℃ and constant temperature, and above-mentioned ready vanadium slag compound is put into retort furnace, takes out behind the 60min and is cooled to room temperature.With the roasting grog be crushed to get the water furnishing slip that the 80g grog adds 320ml behind 40 mesh sieves after, add concentration and be the pH of 32% sulfuric acid regulation solution, keeping the pH value of leaching process is 2.8～3.3, leaches 1h after-filtration solution, washs the content of vanadium of drying, weighing behind the residue 5 times and analyzing residue.The commentaries on classics rate of soaking of vanadium is 88.95% in the vanadium slag.
The roasting experiment of embodiment 2 vanadium slags in return bend
Vanadium slag (is contained V
2O
516.7%, CaO＜0.5%) was crushed to the 0.1mm screen cloth.Vanadium slag after the fragmentation and lime are obtained the 2kg sample by 100: 9.5 weight ratio preparation, mix.
Two sections temperature control return bends of Ф 100 * 1200mm are warming up to 600 ℃ at rear portion, and 950 ℃ of front portions also keep constant.The afterbody of above-mentioned ready sample from return bend added, the rotating speed and the inclination angle of control return bend, making the mean residence time of vanadium slag in boiler tube is 50～60min.The roasting grog of coming out of the stove was crushed to 40 mesh sieves after being cooled to room temperature, get 1.8kg roasting grog, behind 3600mL water furnishing slip, add concentration and be the pH of 60% sulfuric acid regulation solution, keeping the pH value of leaching process is 2.8～3.3, leach 1h after-filtration solution, wash the content of vanadium of drying, weighing behind the residue 5 times and analyzing residue with water.The commentaries on classics rate of soaking of vanadium is 87.57% in the vanadium slag.
Embodiment 3 high calcium vanadium slags are in the experiment of boiling kiln roasting
A kind of high calcium vanadium slag of direct blowing, its V
2O
5Content is 14.3%, and CaO content is 8.86%.Vanadium slag is levigate to crossing the 0.1mm screen cloth.
Get the high calcium vanadium slag 100kg after the fragmentation, in the fluidizing furnace of Ф 100 * 2500mm, carry out roasting, reinforced and discharge the roasting grog from the bottom from top, the medial temperature in the control fluidizing furnace is 900 ℃, and the mean residence time of control vanadium slag in fluidizing furnace is 30min.The roasting grog of coming out of the stove was crushed to 40 mesh sieves, got 10kg roasting grog, behind 30L water furnishing slip, added concentration and be the pH of 63% sulfuric acid regulation solution, and keeping the pH value of leaching process is 2.8～3.3.Leach 1h after-filtration solution, dry, weigh behind the washing residue 5 times and analyze the content of vanadium of residue.The commentaries on classics rate of soaking of vanadium is 87.19% in the vanadium slag.
Above embodiment result shows that the inventive method is not only effective, and the rate of recovery height of vanadium, and easier control stoving oven temperature have shortened roasting time greatly, helps cutting down the consumption of energy, and improves equipment capacity.
Claims (8)
1. the method for calcification vanadium slag sintering is characterized in that: with CaO and V
2O
5Weight ratio is that 0.5～0.7 vanadium slag is in 600 ℃～950 ℃ roasting kiln roastings.
2. the method for calcification vanadium slag sintering as claimed in claim 1, it is characterized in that: need be crushed to particle diameter before the vanadium slag roasting less than 0.125mm, wherein 95% particle is less than 0.1mm.
3. the method for calcification vanadium slag sintering as claimed in claim 1, it is characterized in that: vanadium slag stirs roasting under the state at stoving oven, and the time is 30min～150min.
4. the method for calcification vanadium slag sintering as claimed in claim 1, it is characterized in that: described stoving oven is rotary kiln, multiple hearth furnace, shaft furnace or fluidizing furnace.
5. the method for calcification vanadium slag sintering as claimed in claim 5, it is characterized in that: rotary kiln or multiple hearth furnace maturing temperature are: 600 ℃～950 ℃.
6. the method for calcification vanadium slag sintering as claimed in claim 5, it is characterized in that: the boiling roaster temperature is: 850 ℃～950 ℃.
7. the method for calcification vanadium slag sintering as claimed in claim 1 is characterized in that: behind the water furnishing slip of the roasting grog that obtains after the roasting with 1～4 times of its weight ratio, leach with 32%～65% sulphuric acid soln again.
8. the method for calcification vanadium slag sintering as claimed in claim 8, it is characterized in that: slip is being controlled at 2.8～3.3 with sulphuric acid soln leaching process pH value, 45～65 ℃ of temperature.
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| CNA2007102024458A CN101161831A (en) | 2007-11-09 | 2007-11-09 | Calcification vanadium slag sintering method |
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| WO2010057412A1 (en) * | 2008-11-18 | 2010-05-27 | Pangang Group Research Institute Co. Ltd. | A production method of vanadium oxide using extraction |
| CN101402470B (en) * | 2008-11-18 | 2010-06-09 | 攀钢集团研究院有限公司 | Process for producing vanadium oxide for implementing wastewater circulation with ionic exchange |
| CN102127656A (en) * | 2010-01-13 | 2011-07-20 | 中国科学院过程工程研究所 | Method for decomposing vanadium slag by liquid phase oxidation |
| CN102154559A (en) * | 2011-04-12 | 2011-08-17 | 郴州市金龙铁合金有限公司 | Process for extracting vanadium from vanadium slag containing phosphorus at low temperature |
| CN102260801A (en) * | 2010-06-18 | 2011-11-30 | 中南大学 | Clean conversion method of stone coal |
| CN102476829A (en) * | 2010-11-30 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Preparation method of vanadyl sulfate |
| CN102534233A (en) * | 2012-02-10 | 2012-07-04 | 四川省达州钢铁集团有限责任公司 | Vanadium extraction technology of low-grade high-calcium vanadium-containing steel slag |
| CN102560155A (en) * | 2012-02-22 | 2012-07-11 | 广西冶金研究院 | Method for extracting vanadium from stone coal vanadium ore by using calcium compound additive |
| CN102560086A (en) * | 2012-03-14 | 2012-07-11 | 重庆大学 | Method for extracting vanadium from vanadium slag clinker leached by ammonium carbonate |
| CN102690944A (en) * | 2012-06-19 | 2012-09-26 | 北京神雾环境能源科技集团股份有限公司 | Method for comprehensively recovering vanadium, titanium and iron from high-vanadium vanadium titano-magnetite |
| 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 |
| CN102828019A (en) * | 2012-08-21 | 2012-12-19 | 攀钢集团研究院有限公司 | Method for oxygen-enriched calcification calcination of high-grade vanadium slag |
| CN103305706A (en) * | 2012-03-13 | 2013-09-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for calcium-roasting, cooling and extracting vanadium out of vanadium slag |
| CN103305685A (en) * | 2012-03-13 | 2013-09-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium slag calcium roasting method and roasting product thereof |
| CN103436690A (en) * | 2013-08-23 | 2013-12-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for leaching high-iron vanadium-containing calcified clinker, as well as method for producing vanadium oxide |
| CN103572063A (en) * | 2013-11-04 | 2014-02-12 | 中国科学院过程工程研究所 | Method for cleanly and efficiently recovering vanadium from vanadium slag by employing sodium-free roasting |
| CN103993161A (en) * | 2014-05-21 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Two-segment calcium roasting method of vanadium-containing material |
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| CN105274336A (en) * | 2015-11-27 | 2016-01-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for stabilizing leaching solution in calcification vanadium extraction process |
| CN106011492A (en) * | 2016-07-15 | 2016-10-12 | 东北大学 | Method for extracting vanadium from vanadium slag through ultrasonic strengthening |
| CN109097556A (en) * | 2018-10-09 | 2018-12-28 | 成都先进金属材料产业技术研究院有限公司 | The method that vanadium slag mill synchronous with lime stone is blended standby mixture in vanadium slag calcification process for extracting vanadium |
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| CN111763866A (en) * | 2020-06-10 | 2020-10-13 | 天津炜润达新材料科技有限公司 | Preparation method for directly synthesizing vanadium-nitrogen alloy by adopting vanadium slag |
| CN114134345A (en) * | 2021-11-11 | 2022-03-04 | 武汉科技大学 | Method for reducing dissolution rate of impurities manganese and silicon in vanadium slag calcification roasting-acid leaching vanadium extraction |
| CN114350982A (en) * | 2021-11-30 | 2022-04-15 | 攀钢集团研究院有限公司 | Method for extracting vanadium by using calcified roasting clinker and recycling leaching washing liquid |
| CN114350982B (en) * | 2021-11-30 | 2023-09-15 | 攀钢集团研究院有限公司 | Method for extracting vanadium and recycling leaching washing liquid by calcified roasting clinker |
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