Inorganic Chemicals Industry >
Study on leaching and kinetics of rhododengite in Jingxi area of Guangxi
Received date: 2024-02-28
Online published: 2025-01-24
The rhodochrosite manganese ore from the Jingxi area in Guangxi is characterized by its low grade and the presence of a large amount of alkaline metal oxides，which results in significant acid consumption during the leaching process.When it is scaled up for production，the manganese leaching rate is low，only reaching 85%.To enhance the leaching rate，the said rhodochrosite manganese ore was focused.Through single-factor experiments，the effects of reaction temperature，acid excess coefficient，liquid-to-solid ratio，and reaction time on the leaching rate of manganese from the mineral were studied to optimize the leaching process parameters.Analyses were also conducted on the phase，structure，and morphology of the ore before and after leaching，as well as the kinetics of manganese leaching.The results indicated that under the conditions of a reaction temperature of 85 ℃，an acid excess coefficient of 2.5，a liquid-to-solid ratio of 7∶1，and a reaction time of 4 hours，the leaching rate of the manganese ore could reach 96.13%.Preliminary impurity removal from the leachate before the end of leaching almost completely eliminated Fe and Al impurity elements.After washing the manganese slag for three times，85.62% of the residual manganese in the slag was removed.Based on these findings，a kinetic analysis was performed.The leaching process was described using the unreacted shrinking core model for liquid-solid reactions，revealing that the leaching reaction rate was controlled by chemical reaction，with an activation energy of 42.48 kJ/mol.This technique was characterized by its ability to remove Fe and Al impurity elements during the leaching process，improving the leaching rate of low-grade rhodochrosite manganese ore.
Key words： rhodochrosite; manganese sulfate; leaching; dynamics
ZHENG Kexin , WANG Haifeng , WANG Jiawei , ZHOU Xingjie , PEI Zhengqing , LU Ju , MA Dehua . Study on leaching and kinetics of rhododengite in Jingxi area of Guangxi[J]. Inorganic Chemicals Industry, 2025 , 57(1) : 51 -57 . DOI: 10.19964/j.issn.1006-4990.2024-0106
| 1 | 王松.菱锰矿浸出液净化制备电池级Mn3O4的调控机制研究［D］.贵阳：贵州大学，2023. |
| WANG Song.Study on the regulation mechanism of purification of rhodochrosite leaching solution to prepare battery-grade Mn3O4 ［D］.Guiyang：Guizhou University，2023. | |
| 2 | 任辉，刘敏，王自国，等.我国锰矿资源及产业链安全保障问题研究［J］.中国工程科学，2022，24（3）：20-28. |
| REN Hui， LIU Min， WANG Ziguo，et al.Security of manganese resources and industrial chain in China［J］.Strategic Study of CAE，2022，24（3）：20-28. | |
| 3 | SHI Guangyao， WANG Xueqiu， WANG Wei，et al.Nation-wide concentration and spatial distribution of manganese with links to manganese mineralization in China［J］.Journal of Geochemical Exploration，2023，244：107130. |
| 4 | 吕子虎，李成禄，赵登魁，等.菱锰矿选冶技术研究现状［J］.中国矿业，2023，32（7）：105-111. |
| Zihu Lü， LI Chenglu， ZHAO Dengkui，et al.Research status of dressing-metallurgy technology of rhodochrosite ore［J］.China Mining Magazine，2023，32（7）：105-111. | |
| 5 | 唐道文，董雄文，李军旗，等.软锰矿、菱锰矿联合脱硫制备电池用硫酸锰的工业化试验探讨［J］.有色金属科学与工程，2023，14（4）：454-459. |
| TANG Daowen， DONG Xiongwen， LI Junqi，et al.Industrial experiment study on preparation of battery grade manganese sulfate by combined desulfurization of pyrolusite and rhodochrosite［J］.Nonferrous Metals Science and Engineering，2023，14（4）：454-459. | |
| 6 | 郑宇，李炳震，刘长根，等.软锰矿-硫铁矿协同浸出实验研究［J］.矿冶工程，2022，42（5）：103-105，110. |
| ZHENG Yu， LI Bingzhen， LIU Changgen，et al.Simultaneous leaching of manganese from pyrolusite and pyrite［J］.Mining and Metallurgical Engineering，2022，42（5）：103-105，110. | |
| 7 | 邹廷信，聂程，毛拥军.某进口软锰矿还原焙烧、浸出实验研究［J］.矿冶工程，2022，42（3）：115-117. |
| ZOU Tingxin， NIE Cheng， MAO Yongjun.Experimental study on reduction roasting and leaching of imported pyrolusite［J］.Mining and Metallurgical Engineering，2022，42（3）：115-117. | |
| 8 | 秦志祥，杨婷，卢友志，等.响应曲面法优化速生桉尾料还原浸出软锰矿试验研究［J］.中国锰业，2021，39（4）：22-25. |
| QIN Zhixiang， YANG Ting， LU Youzhi，et al.Optimization of reductive leaching of pyrolusite from fast-growing eucalyptus tail residue by response surface methodology［J］.China Manganese Industry，2021，39（4）：22-25. | |
| 9 | PRASETYO E， PURWANINGSIH E， ASTUTI W.Selective-reductive leaching of manganese from low-grade manganese ore using tannic acid as reductant［J］.Mining，Metallurgy & Exploration，2019，36（5）：1003-1012. |
| 10 | 卢友志，苏李敏，赵义.单宁酸-硫酸体系浸出氧化锰矿中锰的研究［J］.无机盐工业，2022，54（6）：84-89. |
| LU Youzhi， SU Limin， ZHAO Yi.Study on leaching of manganese from manganese dioxide ore with tannic acid-sulfuric acid system［J］.Inorganic Chemicals Industry，2022，54（6）：84-89. | |
| 11 | MORO K， HAUBRICH F， MARTIN M，et al.Reductive leaching behaviour of manganese and cobalt phases in laterite and manganese ores［J］.Hydrometallurgy，2023，220：106101. |
| 12 | 卢友志，王雅梦，赵义.核桃壳还原浸出软锰矿的动力学［J］.有色金属（冶炼部分），2021（12）：28-34. |
| LU Youzhi， WANG Yameng， ZHAO Yi.Reductive leaching kinetics of pyrolusite with walnut shell［J］.Nonferrous Metals（Extractive Metallurgy），2021（12）：28-34. | |
| 13 | YANG Peng， LIANG Xiaoping， WU Chengbo，et al.Improve manganese leaching efficiency by adding different complexants during ammonia leaching of low-grade rhodochrosite［J］.Minerals Engineering，2022，188：107834. |
| 14 | ZENG Xiangfei， SHU Jiancheng， CHEN Mengjun，et al.A cost-effective method for enhancing manganese leaching from rhodochrosite caused by surfactant-regulated crystal growth of CaSO4·2H2O［J］.Hydrometallurgy，2022，211：105870. |
| 15 | YANG Peng， LIANG Xiaoping， WU Chengbo，et al.Study on adding ammonium hydrogen fluoride to improve manganese leaching efficiency of ammonia leaching low-grade rhodochrosite［J］.Metals，2021，11（9）：1496. |
| 16 | DE OLIVEIRA T， GUéGAN R， THIEBAULT T，et al.Adsorption of diclofenac onto organoclays：Effects of surfactant and environmental（pH and temperature） conditions［J］.Journal of Hazardous Materials，2017，323：558-566. |
| 17 | AI Chunming， SUN Pingping， WU Aixiang，et al.Accelerating leaching of copper ore with surfactant and the analysis of reaction kinetics［J］.International Journal of Minerals，Metallurgy，and Materials，2019，26（3）：274-281. |
| 18 | YIN Shenghua， WANG Leiming， WU Aixiang，et al.Enhancement of copper recovery by acid leaching of high-mud copper oxides：A case study at yangla copper mine，China［J］.Journal of Cleaner Production，2018，202：321-331. |
| 19 | 曾祥菲.基于表界面强化的菱锰矿浸出研究［D］.绵阳：西南科技大学，2022. |
| ZENG Xiangfei.Rhodochrosite leaching based on surface-interface enhancement［D］.Mianyang：Southwest University of Science and Technology，2022. | |
| 20 | PRASETYO E， PURWANINGSIH E， ASTUTI W.Selective-reductive leaching of manganese from low-grade manganese ore using tannic acid as reductant［J］.Mining，Metallurgy & Exploration，2019，36（5）：1003-1012. |
| 21 | OSALI M， AHANI F， KHODAEI H，et al.Reductive leaching and recovery of nano-crystalline MnO2 from low-grade pyrolusite ore［J］.Journal of Sustainable Metallurgy，2023，9（3）：1268-1278. |
| 22 | SINHA M K， JORDAAN R， PURCELL W.Hydrometallurgical recovery of manganese from ferruginous manganese ore by reductive-acid leaching with sodium dithionite［J］.Journal of Sustainable Metallurgy，2022，8（2）：783-794. |
| 23 | 李昌新，李秋月，喻源，等.以高硫锰矿制备电池用硫酸锰的净化除杂工艺研究［J］.无机盐工业，2018，50（7）：27-32. |
| LI Changxin， LI Qiuyue， YU Yuan，et al.Purification process of electronic grade manganese sulfate prepared by high-sulfur manganese ores［J］.Inorganic Chemicals Industry，2018，50（7）：27-32. | |
| 24 | DU Jinjia， ZHANG Yanqiong， LU Jiajia，et al.Mechanism of enhanced enrichment manganese from manganese ore-pyrite under microwave heating：Process optimization and kinetic studies［J］.Colloids and Surfaces A：Physicochemical and Engineering Aspects，2023，656：130534. |
| 25 | LIU Dongjie， GAO Lei， CHEN Guo，et al.Enhancement effects of distiller′s dried grains as reducing agents on the kinetics and leaching of pyrolusite from manganese ore［J］.Journal of Materials Research and Technology，2022，19：4270-4281. |
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