为能有效富集含钒钢渣中的钒, 针对Al2O3作用于钒富集过程的行为进行了相关热力学研究. 结果表明, 用Al2O3高温改性后的含钒钢渣在缓冷过程中, 固溶有钒和磷的硅酸二钙相会先期析出. 在1623 K附近, 该矿物与熔渣中Al2O3反应生成富钒矿物---钒磷酸钙(固溶有Ca和Si组分) 和钙铝黄长石. 平衡体系中的硅酸二钙会随渣中Al2O3的增加而减少直至消失, 剩下钒磷酸钙和钙铝黄长石与熔渣平衡共存. 其中, 钙铝黄长石的生成趋势更为占优, 如渣中Al2O3足量, 已生成的钒 磷酸钙中的部分Ca和Si组分, 还会继续与渣中Al2O3结合, 再次生成钙铝黄长石,使磷酸钙中的钒品位进一步提高, 这也是渣中钒和磷结合后含有较少杂质而生成高品位富钒相的最本质原因.
The influence of Al2O3 on vanadium concentration in V-bearing steelmaking slag was stud ied. It was found that the prior precipitated phase of Ca2SiO4（S）contained V and P reacts with （Al2O3）to produce a new V- bearing mineral（Ca3(V,P)2O8•nCa2SiO4），and gehlenite（Ca2 Al2SiO7），when the melt slag modified by Al2O3 cooled down to1623K slowly.As the content of （Al2O3）increasing, Ca2SiO4 will vanished.Because（Al2O3）continue to react with Ca2SiO4 in the new V- bearing mineral,to produce gehlenite. the vanadium concertration in Ca3(V,P)2O8•nCa2SiO4 will increase.results also indicate that the phase of Ca3(V,P)2O8•nCa2SiO4 will be produce enormously and vanadium content in Ca3(V,P)2O8• nCa2SiO4 is high by method of control Al2O3 content in slag. This results provides a solid basic for the design of vanadium concentration mineral and increased the content of vanadium in the V-enriched mineral as much as possible.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] | |
| [14] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%