CN104437042A - Treatment method of acid mist generated in acidic precipitation of vanadate-leaching solution - Google Patents
Treatment method of acid mist generated in acidic precipitation of vanadate-leaching solution Download PDFInfo
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- CN104437042A CN104437042A CN201310441995.0A CN201310441995A CN104437042A CN 104437042 A CN104437042 A CN 104437042A CN 201310441995 A CN201310441995 A CN 201310441995A CN 104437042 A CN104437042 A CN 104437042A
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- aqueous solution
- acid mist
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- ammonium salt
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Abstract
The invention discloses a treatment method of acid mist generated in acidic precipitation of a vanadate-leaching solution. The treatment method comprises the step of absorbing the acid mist generated in acidic precipitation of the vanadate-leaching solution by an alkaline water solution. The treatment method is characterized in that the alkaline water solution is condensed water obtained after reducing, neutralizing and evaporating and concentrating wastewater after the acidic precipitation of the vanadate-leaching solution. Meanwhile, the treatment method further comprises the step of using a water solution after absorbing the acid mist as sodium salt roasting and leaching water of vanadium slag. The treatment method of the acid mist generated in acidic precipitation of the vanadate-leaching solution, disclosed by the invention, has the advantages of low cost and environment friendliness.
Description
Technical field
The present invention relates to a kind of processing method of acid ammonium salt precipitation acid mist.
Background technology
Producing the process of vanadium oxide with acid ammonium salt precipitation, because the effect precipitation process of heating and acid adding can produce a large amount of acid mists, environment and the healthy of post personnel are being worked the mischief.The domestic process to precipitation acid mist at present adopts new water to add alkali to carry out cyclic absorption more, and absorbing liquid a period of time pH value that circulates reduces in backward absorbing liquid and adds alkali, enters Waste Water Treatment and process after absorbing liquid reaches capacity.The shortcoming of the method to use new water and alkaline absorbent medicament, and the absorbing liquid temperature after a period of time that circulates raises, and acid mist assimilation effect is deteriorated, and produce waste water, and the vanadium in acid mist also enters waste water system with absorbing liquid, adds production cost and environmental protection risk.
In addition, after normally being reduced by sodium pyrosulfite, then neutralized by NaOH, then carry out evaporation and concentration and obtain condensed water for the processing method of acid ammonium salt vanadium wastewater, recycling condensing water leaches.This processing method has that reuse condensed water pH value is high, and operation field ammonia level is high, the shortcoming of bad environments.
Summary of the invention
Object of the present invention high with the processing cost overcoming acid ammonium salt precipitation acid mist in prior art, produce the disagreeableness problem of the multipair environment of waste water, provide a kind of cost low, and the processing method of environment amenable acid ammonium salt precipitation acid mist.
To achieve these goals, the invention provides a kind of processing method of acid ammonium salt precipitation acid mist, the method comprises: absorbed acid ammonium salt precipitation acid mist by alkaline aqueous solution, wherein, described alkaline aqueous solution is the condensed water that the waste water after acid ammonium salt precipitation obtains after reduction, neutralization, evaporation and concentration, further, this processing method also comprises the aqueous solution after by absorption acid mist as vanadium slag sodium roasting leaching water.
Preferably, the pH value of described alkaline aqueous solution is 9-10.
More preferably, the pH value of described alkaline aqueous solution is 9.5-10.
Preferably, the temperature of described alkaline aqueous solution is 5-40 DEG C.
More preferably, the temperature of described alkaline aqueous solution is 10-30 DEG C.
Preferably, be that precipitation acid mist is passed in the alkaline aqueous solution of circulation by alkaline aqueous solution to the mode that precipitation acid mist absorbs.
Preferably, when the pH value absorbing the aqueous solution after acid mist is 5-8, the aqueous solution after this absorption acid mist is used as vanadium slag sodium roasting leaching water.
More preferably, when the pH value absorbing the aqueous solution after acid mist is 7-8, the aqueous solution after this absorption acid mist is used as vanadium slag sodium roasting leaching water.
Preferably, the method for the waste water after acid ammonium salt precipitation being carried out reduce, neutralize is after being reduced by sodium pyrosulfite, then is neutralized by NaOH.
By technique scheme, a kind of cost can be provided low, and the processing method of environment amenable acid ammonium salt precipitation acid mist.And, the absorbing liquid of precipitation acid mist is used as after treatment by the waste water prepared by vanadium slag sodium roasting in vanadium oxide process after acid ammonium salt precipitation, the aqueous solution after this absorption acid mist is used as vanadium slag sodium roasting leaching water, vanadium in acid mist can be reclaimed, thus significantly can reduce the production cost that vanadium slag sodium roasting prepares this technology chain of vanadium oxide, remarkable minimizing vanadium slag sodium roasting prepares the discharge capacity of waste water in this technology chain of vanadium oxide, industrially exceedingly useful.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of the process of acid ammonium salt precipitation acid mist for the application.
Detailed description of the invention
Below the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The processing method of precipitation acid mist provided by the invention comprises: absorbed precipitation acid mist by alkaline aqueous solution, wherein, described alkaline aqueous solution is the condensed water that the waste water after acid ammonium salt precipitation obtains after reduction, neutralization, evaporation and concentration, further, this processing method also comprises the aqueous solution after by absorption acid mist as vanadium slag sodium roasting leaching water.
As shown in Figure 1, in the present invention, vanadium slag sodium roasting leachate is by after acid ammonium salt precipitation, the evaporation and concentration after pretreatment (reduction and neutralization) of waste water after acid ammonium salt precipitation is obtained condensed water, this condensed water is used as absorbing liquid (described alkaline aqueous solution), and carry out the acid mist of cyclic absorption acid ammonium salt precipitation generation, and then the aqueous solution after absorbing acid mist is returned as vanadium slag sodium roasting leaching water.
According to the present invention, described alkaline aqueous solution is used as the absorbing liquid absorbing the acid mist produced in acid ammonium salt precipitation process.Described alkaline aqueous solution is the condensed water that the waste water after acid ammonium salt precipitation obtains after reduction, neutralization, evaporation and concentration.Main containing V (V), Cr (VI), ammonia nitrogen and salt in waste water after described acid ammonium salt precipitation.After the V (V) in the waste water after acid ammonium salt precipitation, Cr (VI) being reduced by the method adding sodium pyrosulfite, undertaken neutralizing (being neutralized to pH value is about 7-9) by adding NaOH, then obtain condensed water after evaporation and concentration desalination.Be dissolved with ammonia in the condensed water obtained by said method, as alkaline aqueous solution of the present invention, can be used in the acid mist absorbing acid ammonium salt precipitation generation.
Under normal circumstances, the pH value of the alkaline aqueous solution obtained by said method is 9-10.Consider from absorbing more easily and absorb acid mist aspect more, the pH value of preferred described alkaline aqueous solution is 9.5-10.
According to the present invention, under preferable case, the temperature of described alkaline aqueous solution is 5-40 DEG C; Be more preferably 10-30 DEG C.
According to the present invention, the not special requirement of mode absorbed acid ammonium salt precipitation acid mist by alkaline aqueous solution, is only needed described acid ammonium salt precipitation acid mist to carry out contacting with described alkaline aqueous solution, can adopt the various modes that this area is conventional.But consider from the consumption reducing alkaline aqueous solution, preferably precipitation acid mist is passed in the alkaline aqueous solution of circulation.
According to the present invention, the not special requirement of the consumption for described alkaline aqueous solution, as long as acid ammonium salt precipitation acid mist can absorb by its consumption.Those skilled in the art according to the number of acid ammonium salt precipitation acid mist, can suitably select the consumption of described alkaline aqueous solution.Under preferable case, described alkaline aqueous solution can be made with 3-20m
3/ h(is preferably 5-15m
3/ h) flow carry out circulation to absorb described acid ammonium salt precipitation acid mist.
According to the present invention, in preferred situation, when the pH value absorbing the aqueous solution after acid mist is that 5-8(is preferably 7-8) time, the aqueous solution after this absorption acid mist is used as vanadium slag sodium roasting leaching water.Now, the consumption of the aqueous solution after described absorption acid mist and condition can for this area be in the conventional amount used of carrying out when vanadium slag sodium roasting leaches operation and condition.
Below will be described the present invention by embodiment, but the present invention is not limited in following embodiment.
The absorbing liquid used in embodiment is, by the waste water after acid ammonium salt precipitation after pyrosulfurous acid sodium reduction, is neutralized by NaOH, then by the condensed water that obtains through evaporation and concentration of waste water after neutralization.
Embodiment 1
Vanadium slag sodium roasting leachate passes through in acid ammonium salt precipitation process, with 15m
3the flow circulating absorption solution (22 DEG C, pH value is 9) of/h absorbs the acid mist produced in acid ammonium salt precipitation process, when the pH value absorbing the aqueous solution after acid mist is 8, the aqueous solution after this absorption acid mist is used as vanadium slag sodium roasting leaching water.Wherein, the temperature absorbing the aqueous solution after acid mist is 25 DEG C, absorbs in the aqueous solution after acid mist and produces without precipitation, and the content absorbing v element in the aqueous solution after acid mist is 20mg/L.In addition, the vanadium solution prepared by the aqueous solution after absorption acid mist being used as vanadium slag sodium roasting leaching water meets the requirement of producing vanadium oxide quality.
Embodiment 2
Vanadium slag sodium roasting leachate passes through in acid ammonium salt precipitation process, with 5m
3the flow circulating absorption solution (15 DEG C, pH value is 10) of/h absorbs the acid mist produced in acid ammonium salt precipitation process, when the pH value absorbing the aqueous solution after acid mist is 7, the aqueous solution after this absorption acid mist is used as vanadium slag sodium roasting leaching water.Wherein, the temperature absorbing the aqueous solution after acid mist is 27 DEG C, absorbs in the aqueous solution after acid mist and produces without precipitation, and the content absorbing v element in the aqueous solution after acid mist is 60mg/L.In addition, the vanadium solution prepared by the aqueous solution after absorption acid mist being used as vanadium slag sodium roasting leaching water meets the requirement of producing vanadium oxide quality.
Embodiment 3
Vanadium slag sodium roasting leachate passes through in acid ammonium salt precipitation process, with 10m
3the flow circulating absorption solution (30 DEG C, pH value is 9.5) of/h absorbs the acid mist produced in acid ammonium salt precipitation process, when the pH value absorbing the aqueous solution after acid mist is 7.5, the aqueous solution after this absorption acid mist is used as vanadium slag sodium roasting leaching water.Wherein, the temperature absorbing the aqueous solution after acid mist is 34 DEG C, absorbs in the aqueous solution after acid mist and produces without precipitation, and the content absorbing v element in the aqueous solution after acid mist is 30mg/L.In addition, the vanadium solution prepared by the aqueous solution after absorption acid mist being used as vanadium slag sodium roasting leaching water meets the requirement of producing vanadium oxide quality.
Known by above-described embodiment, by adopting method of the present invention, new water and acid mist can not be used to absorb medicament, reduce cost; Absorbing liquid fully recovering is produced in vanadium oxide, does not produce waste water, environmentally friendly; Vanadium in recyclable precipitation acid mist and waste heat, acid mist assimilation effect is stablized, and reduce further production cost.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (8)
1. the processing method of an acid ammonium salt precipitation acid mist, the method comprises: absorbed acid ammonium salt precipitation acid mist by alkaline aqueous solution, it is characterized in that, described alkaline aqueous solution is the condensed water that the waste water after acid ammonium salt precipitation obtains after reduction, neutralization, evaporation and concentration, further, this processing method also comprises the aqueous solution after by absorption acid mist as vanadium slag sodium roasting leaching water.
2. method according to claim 1, wherein, the pH value of described alkaline aqueous solution is 9-10.
3. method according to claim 2, wherein, the pH value of described alkaline aqueous solution is 9.5-10.
4. method according to claim 1 and 2, wherein, the temperature of described alkaline aqueous solution is 5-40 DEG C.
5. method according to claim 4, wherein, the temperature of described alkaline aqueous solution is 10-30 DEG C.
6. method according to claim 1 and 2 wherein, is be passed in the alkaline aqueous solution of circulation by acid ammonium salt precipitation acid mist by alkaline aqueous solution to the mode that acid ammonium salt precipitation acid mist absorbs.
7. the method according to claim 1 or 6, wherein, when the pH value absorbing the aqueous solution after acid mist is 5-8, is used as vanadium slag sodium roasting leaching water by the aqueous solution after this absorption acid mist.
8. method according to claim 1, wherein, the method for the waste water after acid ammonium salt precipitation being carried out reduce, neutralize is after being reduced by sodium pyrosulfite, then is neutralized by NaOH.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039582A (en) * | 1975-12-29 | 1977-08-02 | Gakif Zakirovich Nasyrov | Method of preparing vanadium pentoxide |
| CN101117239A (en) * | 2007-08-02 | 2008-02-06 | 三穗县恒峰矿业有限公司 | Method for extracting vanadium pentoxide from stone coal vanadium ore |
| CN101709390A (en) * | 2009-12-15 | 2010-05-19 | 武汉科技大学 | On-line circulation method for process for extracting vanadium from stone coal |
| CN102476887A (en) * | 2010-11-29 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Treatment method of vanadium recovery wastewater |
| CN102502900A (en) * | 2011-11-02 | 2012-06-20 | 攀钢集团研究院有限公司 | Treatment method of sodium-roasted-leached-acid ammonium salt vanadium precipitation waste water |
-
2013
- 2013-09-25 CN CN201310441995.0A patent/CN104437042A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039582A (en) * | 1975-12-29 | 1977-08-02 | Gakif Zakirovich Nasyrov | Method of preparing vanadium pentoxide |
| CN101117239A (en) * | 2007-08-02 | 2008-02-06 | 三穗县恒峰矿业有限公司 | Method for extracting vanadium pentoxide from stone coal vanadium ore |
| CN101709390A (en) * | 2009-12-15 | 2010-05-19 | 武汉科技大学 | On-line circulation method for process for extracting vanadium from stone coal |
| CN102476887A (en) * | 2010-11-29 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Treatment method of vanadium recovery wastewater |
| CN102502900A (en) * | 2011-11-02 | 2012-06-20 | 攀钢集团研究院有限公司 | Treatment method of sodium-roasted-leached-acid ammonium salt vanadium precipitation waste water |
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