(1. 萬寶礦產(chǎn)有限公司，北京 100053；
2. 中國(guó)科學(xué)院過程工程研究所濕法冶金清潔生產(chǎn)國(guó)家工程實(shí)驗(yàn)室，北京 100191)
摘 要: 緬甸蒙育瓦銅礦采用生物堆浸-萃取-電積工藝生產(chǎn)A級(jí)(Cu-CATH-1)陰極銅，礦石中主要銅礦物為輝銅礦，同時(shí)黃鐵礦含量較高。生物堆浸提取有價(jià)金屬銅時(shí)，部分黃鐵礦氧化溶解生成硫酸高鐵和硫酸，酸和鐵的不斷累積將給生產(chǎn)系統(tǒng)帶來不利影響。本文介紹了蒙育瓦七星塘銅礦(K礦)生物堆浸特點(diǎn)，其礦體黃鐵礦含量約為12.98%。當(dāng)黃鐵礦氧化率達(dá)到3.31%時(shí)，生產(chǎn)系統(tǒng)基本可以達(dá)到酸平衡。結(jié)合工業(yè)歷史數(shù)據(jù)，分析了黃鐵礦氧化的關(guān)鍵影響因素，對(duì)未來生產(chǎn)過程酸平衡情況進(jìn)行了評(píng)估，并針對(duì)酸過剩問題提出了一系列可能的解決方案。
關(guān)鍵字: 七星塘銅礦；生物堆浸；輝銅礦；黃鐵礦；氧化；酸平衡
（1. Wanbao Mining Limited, Beijing 100053, China;
2. National Engineering Laboratory for Hydrometallurgical Clean Production, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100191, China）
Abstract:Heap bioleaching-solvent extraction-electrowinning is applied in Monywa copper mine to produce A grade cathode copper in Myanmar. Chalcocite is the main copper mineraland quite high amount of pyrite is also included in the ore. During the process of extracting valuable copper from heap bioleaching, a part of pyrite was also oxidized and dissolved into the ferric sulfate and sulfuric acid, which has the adverse effect on the industrial production system. The main traits of Monywa Kyisintaung heap bioleaching practice were introduced. The pyrite content of Kyisintaung ore is about 12.98%. The acid balance during heap bioleaching is reached basically when the oxidation of pyrite reaches 3.31%. Combined with the historical industrial data, the critical factors related to pyrite oxidation were analyzedand the acid balance situation in the future was evaluated. It is suggested that the industrial heap bioleaching of Kyisintaung ore will probably be acid excessive.Some possible solutions are proposed to solve this challenge.
Key words: Kyisintaung copper mine; heap bioleaching; chalcocite; pyrite; oxidation; acid balance
