Application of ultrasonic-enhanced active seed crystals in the removal of sodium oxalate from alumina refinery waste liquor

被引：0

作者：

Duan, Haisheng ^{[1
,2
]}

Ran, Jianfeng ^{[1
]}

Zhao, Jiaping ^{[1
,2
]}

Wang, Xuxu ^{[1
]}

Zhai, Benkang ^{[1
]}

Chen, Ying ^{[2
]}

Yin, Shaohua ^{[1
]}

Li, Shiwei ^{[1
]}

Zhang, Libo ^{[1
]}

Li, Zulai ^{[3
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China

[2] Yunnan Wenshan Aluminum Co Ltd, Wenshan 663000, Yunnan, Peoples R China

[3] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China

来源：

ULTRASONICS SONOCHEMISTRY | 2024年 / 106卷

关键词：

Sodium oxalate; Ultrasonic; Flat plate washing liquor; Organics; Alumina; ORGANIC-COMPOUNDS; BAYER PROCESS; LATERITIC BAUXITES; PART; CRYSTALLIZATION; SONOCRYSTALLIZATION; SOLUBILITY; CARBONATE; IMPURITY;

D O I：

10.1016/j.ultsonch.2024.106881

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

When organic matter, especially sodium oxalate (Na2C2O4), accumulates to a certain extent, it will seriously affect the alumina production process in the refinery and therefore urgently needs to be removed. This work attempts to illuminate the benefits of ultrasonic intensification of the crystallization process of Na2C2O4, taking the alumina refinery waste liquor, i.e., flat plate washing liquor, as a case study. The effects of different operating parameters (seed crystal addition amount, caustic soda concentration, reaction time, ultrasonic power) on the crystallization behavior and yield are discussed, and it is found that ultrasonic can increase the Na2C2O4 removal rate to 70.4%. The addition of ultrasonic promotes the morphological evolution of Na2C2O4 and is of great significance to the optimization of the components of the precipitated Na2C2O4. Specifically, the proportion of Na2C2O4 in the crystallized product reaches 64% with conventional conditions, while it reaches 77% with ultrasonic conditions. Therefore, ultrasonic can greatly reduce the alkali loss caused by the crystallization process of Na2C2O4 in flat plate washing liquor, which has great economic benefits.

引用

页数：10