通过采用热力学软件 Factsage 6.4、SEM、EDS、XRD,并结合红外和拉曼实验手段分析研究了一次倒渣和终点炉渣物相结构.结果表明：一倒渣和终渣的黏度均随着温度的升高而降低.温度相同时,一倒渣的黏度较高,但熔点低于终渣.低温时形成的液相较多,更有利于脱磷反应的进行.炉渣 Si、Ca、P 元素富集的区域,形成的矿相主要为2CaO?SiO2-3CaO?P2 O5固溶体相,对脱磷较为有利；而 Fe、Mn、Mg 和 O 元素富集的区域,形成的物相主要为铁氧化物和RO相,炉渣脱磷能力脱磷较差.红外和拉曼分析结果表明：一倒渣和终渣都形成SiO4四面体单元,一倒渣主要以Si-O-Si键为主,而终渣主要以P-O-P键为主.硅酸盐网状结构单元结构越多,对脱磷越有利.
The phase structures of dephosphorization slag at the first deslagging and final slag were investigated by Factsage 6.4 software,SEM,EDS,XRD,Fourier transformation infrared (FTIR)and Raman spectral spectros-copy analysis.The results show that the first deslagging viscosity and final slag viscosity decrease with increasing temperature.The first deslagging viscosity is higher than that of the final slag at the same temperature;whereas, the melting point of the first deslagging slag is lower.The more the liquid phase forms in low temperature,the better it will be for the dephosphorization reaction.The slag composition which is favorable for enriching Si,Ca and P in the area where the main mineralogical structure is solid solution phases of 2CaO?SiO2-3CaO?P2 O5 has good dephosphorization ability,while the composition which is favorable for enriching Fe,Mn,Mg and O in the area where the main mineralogical structure is phase of iron oxides and RO shows poor dephosphorization ability. The results of FTIR and Raman spectral spectroscopy analysis indicate that it mainly contains [SiO4 ]tetrahedra for the first deslagging and final slag.The Si-O-Si band is mainly formed in dephosphorization slag at the first deslagging,while P-O-P band is mainly formed in the final slag.The more network structure units of silicate exist in slag,the better it will be for slag dephosphorization ability.
参考文献
| [1] | Joo Hyun Park;In-Ho Jung;Sang-Beom Lee.Phase Diagram Study for the CaO-SiO_2-Cr_2O_3-5 mass. percent MgO-10 mass. percent MnO System[J].Metals and Materials International,20094(4):677-681. |
| [2] | Il Sohn;Dong Joon Min.A Review of the Relationship between Viscosity and the Structure of Calcium-Silicate-Based Slags in Ironmaking[J].Steel Research International,20127(7):611-630. |
| [3] | 王雨;郭戌;谢兵;刁江;王广恩.转炉脱磷炉渣中石灰溶解的动力学[J].钢铁研究学报,2011(5):8-10,33. |
| [4] | Pham Khanh SON;Yoshiaki KASHIWAYA.Phosphorous Partition in Dephosphorization Slag Occurring with Crystallization at Initial Stage of Solidification[J].ISIJ International,20089(9):1165-1174. |
| [5] | Farshid PAHLEVANI;Shin-ya KITAMURA;Hiroyuki SHIBATA;Nobuhiro MARUOKA.Distribution of P_2O_5 between Solid Solution of 2CaO·SiO_2–3CaO·P_2O_5 and Liquid Phase[J].ISIJ International,20106(6):822-829. |
| [6] | 吴启帆;包燕平;林路;徐国平;程慧高;黄毅;辛彩萍.转炉钢渣的物相及其冷却析出研究[J].武汉科技大学学报（自然科学版）,2014(6):411-414. |
| [7] | 林路;包燕平;王敏;周寒梅.二氧化钛改质对含磷转炉渣中磷富集行为的影响[J].北京科技大学学报,2014(8):1013-1019. |
| [8] | 王楠;梁志刚;陈敏;邹宗树.CaO-SiO2-FetO-P2O5渣中磷的富集行为[J].东北大学学报（自然科学版）,2011(6):814-817. |
| [9] | Xu GAO;Hiroyuki MATSUURA;Masaki MIYATA.Phase Equilibrium for the CaO-SiO_2-FeO-5mass%P_2O_5-5mass%Al_2O_3 System for Dephosphorization of Hot Metal Pretreatment[J].ISIJ International,20138(8):1381-1385. |
| [10] | 孟华栋;吴伟;刘浏.脱磷炉利用脱碳炉返回渣的试验[J].钢铁研究学报,2014(5):23-27. |
| [11] | 周进东;毕学工;杨福.液渣成分和硅酸二钙颗粒含量对铁水预处理非均相脱磷剂脱磷能力的影响[J].钢铁研究学报,2014(2):7-12. |
| [12] | Xiao YANG;Hiroyuki MATSUURA;Fumitaka TSUKIHASHI.Reaction Behavior of P_2O_5 at the Interface between Solid 2CaO·SiO_2 and Liquid CaO-SiO_2-FeO_x-P_2O_5 Slags Saturated with Solid 5CaO-SiO_2·P_2O_5 at 1573K[J].ISIJ International,20105(5):702-711. |
| [13] | Joo Hyun PARK;Dong Joon MIN;Hyo Seok SONG.FT-IR Spectroscopic Study on Structure of CaO-SiO_2 and CaO-SiO_2-CaF_2 Slags[J].ISIJ International,20024(4):344-351. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%