欢迎登录材料期刊网

材料期刊网

高级检索

针对铬盐无钙焙烧工艺浸出液除钒现行钙盐沉钒法钙盐加入量大、需反复调节pH值、脱钒渣含铬酸钙等问题,提出采用铁盐作为沉钒剂进行除钒。考察铁盐加入量、pH 值和温度等主要因素对钒脱除的影响,得到了最佳工艺条件,且终液钒浓度低于0.08 g/L,满足后续工艺要求。铁盐除钒可在较宽的pH值范围内操作,不需反复调节溶液pH值。渣相分析表明:脱钒渣为吸附钒酸根的氢氧化铁,其中不含铬,进一步探讨氢氧化铁对钒的吸附机理,确定钒酸根通过内层络合方式吸附在氢氧化铁表面。

According to the current existing problem in the vanadium precipitating process in calcium salt by non-calcium roasting technology with chromium salt, such problems as large amount of calcium salt, repeatedly adjusting the pH value, slag containing calcium chromate and other issues, iron salts were used as precipitating agent to remove vanadium. The amount of iron salt added, pH value, temperature and other major factors on the impact of vanadium removal were investigated, the optimum conditions are that the vanadium concentration in final liquid is less than 0.08 g/L, which satisfies the follow-up process requirements. Utilizing iron salt to remove vanadium can be operated in wide pH range, without repeatedly adjusting the pH value. By analyzing, the slag phase is ferric hydroxide, which adsorbs vanadium, containing no chromium. And by further exploring against adsorption mechanism, vanadium is adsorbed on the surface of the iron hydroxide by inner layer complexation.

参考文献

[1] 石玉敏,李俊杰,都兴红,隋智通.采用固相还原法利用工业废渣治理铬渣[J].中国有色金属学报,2006(05):919-923.
[2] 李小斌,齐天贵,彭志宏,刘桂华,周秋生.铬铁矿氧化焙烧动力学[J].中国有色金属学报,2010(09):1822-1828.
[3] 张懿,陈家镛,刘会洲.新一代资源回收·循环集成技术与生态化产业体系[J].化工进展,2000(02):10-11,46.
[4] 王少娜,郑诗礼,张懿.铬盐清洁生产工艺中铝硅的脱除[J].中国有色金属学报,2007(07):1188-1194.
[5] BLOCK H;HALSTENBERG J;LONHOFF N;ROSENOW B SPRECKELMEYER B WEBER R .Process for the production of sodium dichromate[P].US:5250274,1993-10-05.
[6] WEBER R;BLOCK H D;BATZ M;HALSTENBERG J LUMM M ROTH R MERRE D .Process for the utilization of vanadium from chromium ore as vanadium(V)oxide[P].US:7157063B2,2007-01-02.
[7] 丁瑞锋 .铬酸钠溶液中加石灰除钒的研究[D].中南大学,2011.
[8] 欧阳玉祝,王继徽.铁屑微电解--共沉淀法处理含钒废水[J].化工环保,2002(03):165-168.
[9] 陈亮.从钒浸出液中沉淀结晶型钒酸铁试验研究[J].湿法冶金,2010(03):171-175.
[10] LIANG C;LIU F;LI D .Precipitation of crystallized hydrated iron(Ⅲ)vanadate from industry Al vanadium[J].HYDROMETALLURGY,2011,105:229-233.
[11] AVOTINS P V .Adsorption and coprecipitation studies of mercury on hydrous iron oxide[D].Stanford:Stomforde Stanford University,1975.
[12] BENJAMIN M M;HAYES K F;LECKIE J O .Removal of toxic metals from power generation waste streams by adsorption and co-precipitation[J].Water Poll Control Fed J,1982,54:1472-1481.
[13] TOKUNAGA S;WASAY S A;PARK S W .Removal of arsenic(V)ion from aqueous solutions by lanthanum compounds[J].Water Science and Technology,1997,35(07):71-78.
[14] Peacock CL;Sherman DM .Vanadium(V) adsorption onto goethite (alpha-FeOOH) at pH 1.5 to 12: A surface complexation model based on ab initio molecular geometries and EXAFS spectroscopy[J].Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society,2004(8):1723-1733.
[15] 陈亮.从提钒浸出液中沉淀结晶型钒酸铁工艺研究[C].第19届全国铁合金学术研讨会论文集,2010:137-143.
[16] 罗南;刘波;李国良;何晋秋 .活性氢氧化铁处理含钒(V)废水的研究[J].四川环境,1989,8(01):39-48.
[17] GREENWOOD N N;EARNSHAW A.Chemistry of the Elements[M].Oxford:Butterworth -Heinemann,1997
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%