Sustainable Mining and Metallurgy

Sustainable Mining and Metallurgy

CN 10-1873/TF
ISSN 2097-2423

1
2
3

Study on the Change Rule of Elements in the Concentration of Acid Leach Solution of Modified Steel SlagJIANG Xiaoyuan, FANG Youdong, CHENG Muyi, WANG Jiafeng, SU Chang, LV Ningning
undefined
Conversion Process of α-Hemihydrate Gypsum Prepared from Phosphogypsum by Hydrothermal MethodCHEN Yutong, ZHENG Jierui, HUANG Hu, LI Xianbo, WANG Xianchen
undefined
绿色冶金 Preparation of Scheelite Concentrate from Alkaline Leaching Solution of Spent SCR Denitrification CatalystLIU Jinlong, WANG Chenye, WANG Xingrui, LI Huiquan
At present, sodium hydroxide alkali leaching method is usually used to extract tungsten from spent SCR denitration catalyst，and tungsten-containing alkaline lea...

Qr Code

WeChat

Current Discuss
First Published
Album Paper
Archive

Select All

Display Mode: |

Select All

Display Mode: |

全选

Display Mode: |

Study on the Change Rule of Elements in the Concentration of Acid Leach Solution of Modified Steel Slag
JIANG Xiaoyuan, FANG Youdong, CHENG Muyi, WANG Jiafeng, SU Chang, LV Ningning

2025,41(5):40-45, DOI: 10.19610/j.cnki.cn10-1873/tf.2025.05.007

Abstract(3) HTML(0) PDF(2.31 M)( 1) Collect

Abstract:

undefined

Conversion Process of α-Hemihydrate Gypsum Prepared from Phosphogypsum by Hydrothermal Method
CHEN Yutong, ZHENG Jierui, HUANG Hu, LI Xianbo, WANG Xianchen

2025,41(5):34-39, DOI: 10.19610/j.cnki.cn10-1873/tf.2025.05.006

Abstract(1) HTML(0) PDF(4.92 M)( 0) Collect

Abstract:

undefined

绿色冶金

Preparation of Scheelite Concentrate from Alkaline Leaching Solution of Spent SCR Denitrification Catalyst
LIU Jinlong, WANG Chenye, WANG Xingrui, LI Huiquan

2024(1):7-13, DOI: 10.19610/j.cnki.cn10-1873/tf.2024.01.002

Abstract(27) HTML(0) PDF(3.42 M)( 144) Collect

Abstract:

At present, sodium hydroxide alkali leaching method is usually used to extract tungsten from spent SCR denitration catalyst，and tungsten-containing alkaline leaching solution is obtained. In addition to tungsten, the alkaline leaching solution also contains impurity elements such as vanadium, silicon, and sulfur. Due to the high alkali concentration of the solution, traditional extraction and adsorption methods are difficult to implement. The traditional hydrochloric acid neutralization-calcium chloride precipitation method would take Cl^-into the system, resulting in equipment corrosion. In this paper, a new magnesium sulfate desilication-calcium oxide precipitation process was proposed to remove silicon and precipitate tungsten to prepare scheelite concentrate. In the process of magnesium sulfate desilication, by using sulfuric acid to adjust the pH value of the system to 11, under the condition of magnesium-to-silicon molar ratio of 0.9, the silicon removal rate can reach 97.6%. The desilication solution was precipitated by calcium oxide to produce scheelite concentrate. Under the optimum process conditions of calcium-to-tungsten molar ratio of 1.1 and boiling temperature of 108℃, the WO₃ content in the obtained scheelite concentrate product reached 74.69%, the sulfur content was 0.90%, and the silicon content was 1.00%, which met the requirements of YS/T 231—2015 Grade Ⅰ scheelite concentrate. The process realizes the efficient recovery of tungsten from the alkaline leaching solution of spent SCR denitration catalyst, and avoids the potential equipment corrosion issues associated with the traditional hydrochloric acid neutralization-calcium chloride precipitation method.

See More

About

Governing Body：China Nonferrous Metal Industry Association

Organizer：China Nonferrous Engineering Co., Ltd.

CN：10-1873/TF

ISSN：2097-2423

Address：12 Fuxing Avenue, Haidian District, Beijing

Phone：010-63936593

Email：ysjn100@126.com