Synergistic Leaching of Iron from Pyrite Cinder Using Oxalic-Sulfuric Acid System：Mechanistic Insights and Process Optimization

LI Xiaojiao; YANG Xiaojian; HU Guotao; CHEN Zhiheng; ZHANG Kun; ZHENG Chunli

doi:10.7652/xjtuxb202511003

您当前的位置：

首页 >

文章列表页 >

Synergistic Leaching of Iron from Pyrite Cinder Using Oxalic-Sulfuric Acid System：Mechanistic Insights and Process Optimization

Special Topic Pollution Control and Resource Utilization in the“Dual Carbon”Context | 更新时间：2025-11-11

- Synergistic Leaching of Iron from Pyrite Cinder Using Oxalic-Sulfuric Acid System：Mechanistic Insights and Process Optimization
- Journal of Xi'an Jiaotong University Vol. 59, Issue 11, Pages: 32-41(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202511003
  CLC： TF09
- Received：24 March 2025，
  
  Published：10 November 2025
- 稿件说明：
移动端阅览
LI Xiaojiao, YANG Xiaojian, HU Guotao, et al. Synergistic Leaching of Iron from Pyrite Cinder Using Oxalic-Sulfuric Acid System：Mechanistic Insights and Process Optimization[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 32-41.
DOI：

LI Xiaojiao, YANG Xiaojian, HU Guotao, et al. Synergistic Leaching of Iron from Pyrite Cinder Using Oxalic-Sulfuric Acid System：Mechanistic Insights and Process Optimization[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 32-41. DOI： 10.7652/xjtuxb202511003.

摘要

针对硫铁矿烧渣中铁资源回收率低、传统酸浸法效率不足的问题，提出了H

-H

协同浸出体系，通过响应面法优化浸出时间、温度、液固比及硫酸质量分数等工艺参数，并结合浸出动力学和热力学分析协同浸出机制，对浸出前后样品的形貌和物相化进行表征。结果表明：草酸通过较强的络合作用显著提升铁浸出率；响应面法优化优的H

-H

铁浸出模型准确，在浸出时间为6h、温度为90℃、液固比为6mg/L、硫酸质量分数为50%的条件下，硫铁矿烧渣中铁的浸出率达到了98.62%，与模型预测值的误差仅为0.37%；草酸优先络合铁氧化物生成可溶性[Fe（C

）

]

，硫酸则通过质子化作用加速其转化为Fe

（SO

）

，浸出过程受界面化学反应与内部扩散联合控制。此外，通过光诱导还原法从浸出液中成功回收二水合草酸亚铁，其晶体结构完整且纯度较高。该研究可为冶金废弃物资源化提供经济环保的技术方案。

Abstract

To address the low recovery efficiency of iron resources from pyrite cinder and the inefficiency of conventional acid leaching methods

a synergistic leaching system ofH

-H

is proposed. The optimization of process parameters

such as leaching time

temperature

liquid-solid ratio

and sulfuric acid concentration

is performed using response surface method. The synergistic leaching mechanism is analyzed through leaching kinetics and thermodynamics

and the morphology and phase compositions of samples before and after leaching are characterized. Results show that oxalic acid significantly enhances the iron leaching rate due to its strong complexation ability. The optimizedH

-H

model

developed using response surface method

accurately predicts the leaching efficiency. Under the optimized conditions of 6 hours of leaching time

90℃ temperature

a liquid-solid ratio of 6mg/L

and 50% sulfuric acid concentration

the iron leaching rate from pyrite cinder reaches 98.62%

with a deviation of only 0.37% from the predicted value. Oxalic acid preferentially complexes with iron oxides to form soluble [Fe (C

)

]

while sulfuric acid accelerates its conversion to Fe

(SO

)

through protonation. The leaching process is jointly controlled by interfacial chemical reactions and internal diffusion. Furthermore

ferrous oxalate dihydrate is successfully recovered from the leachate using a photo-induced reduction method

yielding crystals with high purity and intact structure. It provides an economical and environmentally friendly solution for the resource recovery of metallurgical waste.

关键词

Keywords

references

JIANG Tao , TU Yikang , SU Zijian , et al . A novel value-added utilization process for pyrite cinder:selective recovery of Cu/Co and synthesis of iron phosphate [J ] . Hydrometallurgy , 2020 , 193 : 105314 .

DONG Tao , GUO Zhengqi , ZHU Deqing , et al . Manufacturing of Fe/C micro-electrolysis materials with the pyrite cinder towards the degradation of high-concentration organic wastewater [J ] . Journal of Environmental Chemical Engineering , 2024 , 12 ( 5 ): 113502 .

陈官华 . 硫酸渣还原焙烧铜钴物相转变：浸出行为研究 [D ] . 武汉 : 武汉工程大学 , 2022 .

LIU Jian , WEN Shuming , CHEN Yu , et al . Process optimization and reaction mechanism of removing copper from an Fe-rich pyrite cinder using chlorination roasting [J ] . Journal of Iron and Steel Research International , 2013 , 20 ( 8 ): 20 - 26 .

左豪恩 , 温建康 , 崔兴兰 , 等 . 硫酸渣脱硫制备高品质铁精矿研究进展 [J ] . 工程科学学报 , 2018 , 40 ( 1 ): 1 - 8 .

ZUO Haoen , WEN Jiankang , CUI Xinglan , et al . Review of research progress on preparation of high-quality iron concentrate from pyrite cinder by desulphurization [J ] . Chinese Journal of Engineering , 2018 , 40 ( 1 ): 1 - 8 .

KARACAHAN M K . Optimization and kinetic study of manganese leaching from pyrolusite ore in hydrochloric acid solutions with oxalic acid [J ] . Journal of Sustainable Metallurgy , 2024 , 10 ( 3 ): 1717 - 1732 .

党晓娥 , 阳丹 , 王碧侠 . 草酸浸出分离中浸渣中铁锌的机理与分离条件的优化 [J ] . 有色金属工程 , 2024 , 14 ( 11 ): 96 - 107 .

DANG Xiaoe , YANG Dan , WANG Bixia . Mechanism of zinc and iron separation in neutral leaching residue by oxalic acid solution and optimization of the separation condition [J ] . Nonferrous Metals Engineering , 2024 , 14 ( 11 ): 96 - 107 .

党晓娥 , 李康瑞 , 王碧侠 , 等 . 草酸-草酸铵浸出氰化尾渣中赤铁矿机理及动力学 [J ] . 中国冶金 , 2024 , 34 ( 8 ): 117 - 127 .

DANG Xiaoe , LI Kangrui , WANG Bixia , et al . Mechanism and kinetics of leaching hematite from roasted cyanide tailings by oxalic acid and ammonium oxalate [J ] . China Metallurgy , 2024 , 34 ( 8 ): 117 - 127 .

WAFI A , WISELY N , DARSONO N , et al . Sustain able recovery of Fe (Ⅱ)oxalate from steel industry waste using leaching,hydrothermal,and photo-reduction routes [J ] . Journal of Sustainable Metallurgy , 2023 , 9 ( 3 ): 1114 - 1125 .

XU Tianyuan , ZHU Runliang , SHANG Huan , et al . Photochemical behavior of ferrihydrite-oxalate system:Interfacial reaction mechanism and charge transfer process [J ] . Water Research , 2019 , 159 : 10 - 19 .

张海洋 , 刘铎 , 聂文君 , 等 . 有机酸酸浸拜耳法赤泥元素浸出机制分析 [J ] . 环境科学与技术 , 2025 , 48 ( 1 ): 33 - 40 .

ZHANG Haiyang , LIU Duo , NIE Wenjun , et al . Analysis of element leaching mechanism of Bayer red mud by organic acid leaching [J ] . Environmental Science & Technology , 2025 , 48 ( 1 ): 33 - 40 .

杨保俊 , 方晓宇 , 王百年 , 等 . 草酸助剂强化酸浸法提取硫酸烧渣中的铁 [J ] . 化工进展 , 2019 , 38 ( 3 ): 1552 - 1560 .

YANG Baojun , FANG Xiaoyu , WANG Bainian , et al . Extraction of iron from pyrite cinder via oxalic acidintensified leaching method [J ] . Chemical Industry and Engineering Progress , 2019 , 38 ( 3 ): 1552 - 1560 .

张永晴 . 盐酸法硫铁矿烧渣制备磷酸铁工艺研究 [D ] . 武汉 : 武汉工程大学 , 2023 .

高燕 . 广西平果铝厂赤泥两段酸浸铝铁工艺研究 [D ] . 太原 : 太原理工大学 , 2014 .

XU Xiangming , ZHOU Kechao , LI Xiaobin , et al . Leaching of synthetic Ca 3 WO 6 with ammoniacal ammonium carbonate solution under atmospheric pressure:a fundamental study [J ] . Hydrometallurgy , 2019 , 184 : 55 - 66 .

TIAN Lei , LIU Yan , ZHANG Tingan , et al . Kinetics of Indium dissolution from marmatite with high Indium content in pressure acid leaching [J ] . Rare Metals , 2017 , 36 ( 1 ): 69 - 76 .

WANG H H , LI G Q , ZHAO D , et al . Dephosphorization of high phosphorus oolitic hematite by acid leaching and the leaching kinetics [J ] . Hydrometallurgy , 2017 , 171 : 61 - 68 .

陈婷 , 陈振华 , 徐天缘 . 草酸与铁氧化物相互作用及光化学活化分子氧过程的研究进展 [J ] . 环境化学 , 2024 , 43 ( 2 ): 405 - 415 .

CHEN Ting , CHEN Zhenhua , XU Tianyuan . Environmental photochemical behaviors of iron minerals and oxalate and reactive oxygen species generation:a review [J ] . Environmental Chemistry , 2024 , 43 ( 2 ): 405 - 415 .

党晓娥 , 张婷 . 氰化尾渣浸出液光催化制备草酸亚铁及再生 <math display="block"><msub><mrow><mi mathvariant="normal">C</mi></mrow><mrow><mtext mathvariant="monospace">2</mtext></mrow></msub><msubsup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mtext mathvariant="monospace">4</mtext></mrow><mrow><mtext mathvariant="monospace">2</mtext><mo>−</mo></mrow></msubsup></math> 的研究 [J ] . 黄金 , 2022 , 43 ( 12 ): 86 - 92 .

DANG Xiaoe , ZHANG Ting . Ferrous oxalate prepared and the regeneration of <math display="block"><msub><mrow><mi mathvariant="normal">C</mi></mrow><mrow><mtext mathvariant="monospace">2</mtext></mrow></msub><msubsup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mtext mathvariant="monospace">4</mtext></mrow><mrow><mtext mathvariant="monospace">2</mtext><mo>−</mo></mrow></msubsup></math> from leaching solution of cyanide tailings by photocatalysis [J ] . Gold , 2022 , 43 ( 12 ): 86 - 92 .

YANG Yang , WANG Xuewen , WANG Mingyu , et al . Recovery of iron from red mud by selective leach with oxalic acid [J ] . Hydrometallurgy , 2015 , 157 : 239 - 245 .

MONTEAGUDO J M , DURÁN A , AGUIRRE M , et al . Optimization of the mineralization of a mixture of phenolic pollutants under a ferrioxalate-induced solar photo-Fenton process [J ] . Journal of Hazardous Materials , 2011 , 185 ( 1 ): 131 - 139 .

KATSUMATA H , OKADA T , KANECO S , et al . Degradation of fenitrothion by ultrasound/ferrioxalate/UV system [J ] . Ultrasonics Sonochemistry , 2010 , 17 ( 1 ): 200 - 206 .

黄荃莅 , 黄魁 , 卢远桓 , 等 . 草酸浸出和太阳光催化回收赤泥中的铁和铝 [J ] . 环境工程 , 2021 , 39 ( 12 ): 199 - 205 .

HUANG Quanli , HUANG Kui , LU Yuanhuan , et al . Recovery of iron and aluminum from red mud by oxalic acid leaching and solar photocatalysis [J ] . Environmental Engineering , 2021 , 39 ( 12 ): 199 - 205 .

SATYA T P , RIFAI A , ARINI T , et al . Structural and electrochemical properties of LiFePO 4 cathode synthesized by solid-state reaction using FeC 2 O 4 .2 H 2 O precursor from local Indonesian ilmenite mine ral [J ] . Emergent Materials , 2024 , 7 ( 4 ): 1675 - 1682 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Diffusion Characteristics and Influencing Factors in Case of Hydrogen Leakage from Fuel Cell Vehicles Running in Tunnels

Integrated and Joint Design Optimization of Centrifugal Compressor Impeller and Casing Treatment at Multiple Working Points

Numerical Simulation of the Energy Conversion Process in Thermoacoustic Engines with Different Stack Materials

Effects of Steam Addition on the Swirl Combustion and Emission Characteristics of Cracked Ammonia

Windage Loss and Flow Characteristics in Impeller Back Gaps of sCO2 Radial Inflow Turbines

Related Author

ZENG Haitao

PU Liang

YU Zhipeng

XU Feng

LIU Yunsheng

Related Institution

School of Energy and Power Engineering, Xi'an Jiaotong University

Prochip Gas (Shanghai) Co., Ltd.

MOE key Laboratory of cryogenic technology and equipment, Xi’an Jiaotong University

Jiangxi Zhuochao Technology Co., Ltd.

⁰