A Novel Process for Purification and Recovery of Negative Component Calcium in Vanadium-Bearing Steel Slag

2021 ◽  
Author(s):  
Yue Tang ◽  
Guohua Ye ◽  
Siqin Zhu ◽  
Xuanxiong Kang ◽  
Xueyin Liang ◽  
...  
Keyword(s):  
Steel Slag ◽  
Bearing Steel ◽  
Negative Component

Leaching of silica from vanadium-bearing steel slag in sodium hydroxide solution

2010 ◽  
Vol 104 (2) ◽  
pp. 216-221 ◽  
Author(s):  
Qinggui Xiao ◽  
Yin Chen ◽  
Yiying Gao ◽  
Hongbin Xu ◽  
Yi Zhang
Keyword(s):  
Sodium Hydroxide ◽  
Sodium Hydroxide Solution ◽  
Steel Slag ◽  
Bearing Steel ◽  
Hydroxide Solution

Basic research on the leaching behavior of vanadium-bearing steel slag with titanium white waste acid

2021 ◽  
Vol 9 (1) ◽  
pp. 104897
Author(s):  
Weiguang Zhang ◽  
Tingan Zhang ◽  
Tingting Li ◽  
Guozhi Lv ◽  
Xuejiao Cao
Keyword(s):  
Steel Slag ◽  
Basic Research ◽  
Bearing Steel ◽  
Leaching Behavior ◽  
Titanium White ◽  
Waste Acid

Leaching behavior and kinetics of vanadium extraction from vanadium-bearing steel slag

2019 ◽  
Vol 116 (4) ◽  
pp. 407 ◽  
Author(s):  
Minglei Gao ◽  
Xiangxin Xue ◽  
Lanjie Li ◽  
He Yang ◽  
Donghui Chen
Keyword(s):  
Sodium Hydroxide ◽  
Sodium Hydroxide Solution ◽  
Steel Slag ◽  
Bearing Steel ◽  
Leaching Kinetics ◽  
Leaching Rate ◽  
High Concentration ◽  
Sodium Hydroxide Concentration ◽  
Highly Sensitive ◽  
Increasing Temperature

The vanadium-bearing steel slag as solid waste is also one of valuable vanadium-containing resource. Recovering vanadium from the refractory steel slag is a great challenge in the world. A leaching process study using high concentration sodium hydroxide solution was proposed in this laboratory work. The effects of sodium hydroxide concentration, particle size, leaching temperature and the ratio of alkali to slag on the rate of vanadium leaching were determined and the leaching kinetics was presented. It indicates that the leaching rate is highly sensitive to the sodium hydroxide concentration and leaching temperature and increases with increasing temperature and sodium hydroxide concentration. By studying the reaction mechanisms, it was found that the dicalcium silicate, tricalcium silicate and calcium ferrited which co-exist with calcium vanadate in the vanadium-bearing steel slag were gradually exposed and reacted with NaOH media to form Na3VO4. The leaching kinetics was analyzed which indicated that the leaching rate is controlled by the chemical reaction with the apparent activation energy of 51.34 kJ/mol. On the basis of this process, the vanadium can be effectively extracted with a leaching rate of more than 80%. The leaching medium can be recycled. It is an effective and cleaner process for leaching vanadium.

Vanadium extraction from roasted vanadium-bearing steel slag via pressure acid leaching

2021 ◽  
Vol 9 (3) ◽  
pp. 105195
Author(s):  
Shugen Liu ◽  
Ermao Ding ◽  
Ping Ning ◽  
Gang Xie ◽  
Ni Yang
Keyword(s):  
Steel Slag ◽  
Acid Leaching ◽  
Bearing Steel ◽  
Vanadium Extraction ◽  
Pressure Acid Leaching

Direct Leaching of Vanadium from Vanadium-bearing Steel Slag Using NaOH Solutions: A Case Study

2020 ◽  
pp. 1-11
Author(s):  
Junfeng Wan ◽  
Hao Du ◽  
Feng Gao ◽  
Shaona Wang ◽  
Minglei Gao ◽  
...  
Keyword(s):  
Steel Slag ◽  
Bearing Steel ◽  
Direct Leaching

scholarly journals The Establishment of Thermodynamic Model for Ti Bearing Steel-Slag Reaction and Discuss

2022 ◽  
Vol 8 ◽  
Author(s):  
Mao-Guo Zhao ◽  
Xu-Feng Wang ◽  
Gu-Jun Chen ◽  
Sheng-Ping He
Keyword(s):  
Gibbs Energy ◽  
Thermodynamic Model ◽  
Steel Slag ◽  
Influence Factors ◽  
Bearing Steel ◽  
Molar Gibbs Energy ◽  
Energy Change ◽  
Gibbs Energy Change ◽  
Mass Ratio ◽  
Coexistence Theory

A thermodynamic model for seven CaO-MgO-BaO-CaF2-SiO2-Al2O3-TiO2 ladle slags based on the Ion and Molecule Coexistence theory (IMCT) is establishment and validated by the experiment results at 1873K. The calculated activity of SiO2, Al2O3 and TiO2 in the slag can be approved by the experiment results and the IMCT model used in this study is reasonable. Then the influence factors such as the mass ratio of CaO to SiO2 (C/S ratio) ranging from 1 to 10, the mass ratio of CaO to Al2O3 (C/A ratio) ranging from 1 to 2.5, TiO2 content (wt pct) ranging from 0 to 30, BaO content (wt pct) ranging from 0 to 30 are investigated based on the thermodynamic calculating results. The raise of C/S ratio, TiO2 content and BaO content in the slag can increase the molar Gibbs energy change (ΔG) of Ti reacted with SiO2 and Al2O3 or Al reacted with SiO2. The effect of C/A ratio on the molar Gibbs energy change (ΔG) of Ti reacted with SiO2 and Al2O3 or Al reacted with SiO2 was less. Finally, the slag with higher C/S ratio and TiO2 content and appropriate BaO content can weaken the reaction between Ti and SiO2 or Al2O3 in the slag.

Spray-Formed Bearing Steel with High Oxide Cleanliness and Small and Fine Dispersed Inclusions*

2014 ◽  
Vol 69 (6) ◽  
pp. 368-376 ◽  
Author(s):  
A. Schulz ◽  
W. Trojahn ◽  
C. Meyer ◽  
V. Uhlenwinkel
Keyword(s):  
Bearing Steel ◽  
Dispersed Inclusions
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