用碳热还原法从含钒钢渣回收含钒生铁  

RECOVERY OF V-BEARING PIG IRON FROM STEELMAKING SLAGS BY CARBON THERMAL REDUCTION

作　　者：李光强[1] 张鹏科[1] 朱诚意[1] 张力[2] 隋智通[2] 

机构地区：[1]武汉科技大学,武汉430081 [2]东北大学,沈阳110004

出　　处：《四川冶金》2005年第5期61-64,53,共5页Sichuan Metallurgy

摘　　要：实验研究表明对于含钒2.65%钢渣,钒元素主要分布在RO相和Ca3SiO5相中;调节渣中(CaO/SiO2)=2,含V2O53.4%的合成渣,熔化缓冷后,钒主要固溶于Ca3SiO5相中;对于V2O5含量在4.7%～7.0%之间的钢渣,钒是以CaV2O6还是Fe-Nn-V-O固溶体形式存在主要取决于渣中铁氧化物的含量.在钒含量较低的钢渣中,由于含钒相的晶粒较小,很难将钒从其它组分中分离出来,但在1550～1600℃条件下,用碳热还原法可以有效地回收钢渣中的钒,得到被碳饱和的钒铁合金,利用渣在冷却过程中自动粉化现象,很容易实现渣和合金的分离.The vanadium distribution and the method of recovering vanadium in the steelmaking converter slag were studied. In the as received converter slag containing 2.65% V2O5 vanadium distributed both in lime solid solution and Ca3SiO5. For the slow cooled synthetic slag containing 3.4 % V2O5 with basicity （CaO/SiO2） = 2, vanadium exits mainly in Ca3SiO5. ; but for the slag containing 4.7 to 7.0 % V2O5, vanadium exits in the form of CaV2O6 or Fe - Mn - V - O solid solutions depending on the iron oxide content. Due to the small grain size of vanadium bearing phases and low V2O5 content in the converter slag, it is difficult to separate vanadium bearing phase from the other components A special designed carbon thermal reduction process was tried to recovery vanadium efficiently from converter slags. In this process, carbon saturated vanadium- bearing ferroalloy could be obtained at 1550-1600℃ ,and it is easily to be separated from the remained slag by making use of the dusting phenomenon of dicalcium silicate.

关 键 词：钒 钢渣 回收 含钒生铁 碳热还原法 钒铁合金 钒含量 V2O5 铁氧化物 冷却过程 

分 类 号：X757[环境科学与工程—环境工程]