Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation

Sulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0–2.0) for copper dissolution. An industrial practice of...

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Autores principales:	Yan Jia, Heyun Sun, Qiaoyi Tan, Jingyuan Xu, Xinliang Feng, Renman Ruan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	copper sulfide ore heap bioleaching pyrite sulfuric acid water irrigation Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/254ca2d096454806a832b5d6af402f49
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spelling	oai:doaj.org-article:254ca2d096454806a832b5d6af402f492021-11-25T18:26:57ZIndustrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation10.3390/min111112992075-163Xhttps://doaj.org/article/254ca2d096454806a832b5d6af402f492021-11-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1299https://doaj.org/toc/2075-163XSulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0–2.0) for copper dissolution. An industrial practice of heap bioleaching of secondary copper sulfide ore that began with only water irrigation without the addition of sulfuric acid was successfully implemented and introduced in this manuscript. The mineral composition and their behavior related to the production and consumption of sulfuric acid during the bioleaching in heaps was analyzed. This indicated the possibility of self-generating of sulfuric acid in heaps without exogenous addition. After proving by batches of laboratory tests, industrial measures were implemented to promote the sulfide mineral oxidation in heaps throughout the acidifying stages, from a pH of 7.0 to 1.0, thus sulfuric acid and iron was produced especially by pyrite oxidation. After acidifying of the heaps, adapted microbial consortium was inoculated and established in a leaching system. The launch of the bioleaching heap and finally the production expansion were realized without the addition of sulfuric acid, showing great efficiency under low operation costs.Yan JiaHeyun SunQiaoyi TanJingyuan XuXinliang FengRenman RuanMDPI AGarticlecopper sulfide oreheap bioleachingpyritesulfuric acidwater irrigationMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1299, p 1299 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	copper sulfide ore heap bioleaching pyrite sulfuric acid water irrigation Mineralogy QE351-399.2
spellingShingle	copper sulfide ore heap bioleaching pyrite sulfuric acid water irrigation Mineralogy QE351-399.2 Yan Jia Heyun Sun Qiaoyi Tan Jingyuan Xu Xinliang Feng Renman Ruan Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation
description	Sulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0–2.0) for copper dissolution. An industrial practice of heap bioleaching of secondary copper sulfide ore that began with only water irrigation without the addition of sulfuric acid was successfully implemented and introduced in this manuscript. The mineral composition and their behavior related to the production and consumption of sulfuric acid during the bioleaching in heaps was analyzed. This indicated the possibility of self-generating of sulfuric acid in heaps without exogenous addition. After proving by batches of laboratory tests, industrial measures were implemented to promote the sulfide mineral oxidation in heaps throughout the acidifying stages, from a pH of 7.0 to 1.0, thus sulfuric acid and iron was produced especially by pyrite oxidation. After acidifying of the heaps, adapted microbial consortium was inoculated and established in a leaching system. The launch of the bioleaching heap and finally the production expansion were realized without the addition of sulfuric acid, showing great efficiency under low operation costs.
format	article
author	Yan Jia Heyun Sun Qiaoyi Tan Jingyuan Xu Xinliang Feng Renman Ruan
author_facet	Yan Jia Heyun Sun Qiaoyi Tan Jingyuan Xu Xinliang Feng Renman Ruan
author_sort	Yan Jia
title	Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation
title_short	Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation
title_full	Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation
title_fullStr	Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation
title_full_unstemmed	Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation
title_sort	industrial heap bioleaching of copper sulfide ore started with only water irrigation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/254ca2d096454806a832b5d6af402f49
work_keys_str_mv	AT yanjia industrialheapbioleachingofcoppersulfideorestartedwithonlywaterirrigation AT heyunsun industrialheapbioleachingofcoppersulfideorestartedwithonlywaterirrigation AT qiaoyitan industrialheapbioleachingofcoppersulfideorestartedwithonlywaterirrigation AT jingyuanxu industrialheapbioleachingofcoppersulfideorestartedwithonlywaterirrigation AT xinliangfeng industrialheapbioleachingofcoppersulfideorestartedwithonlywaterirrigation AT renmanruan industrialheapbioleachingofcoppersulfideorestartedwithonlywaterirrigation
_version_	1718411121669439488

Industrial Heap Bioleaching of Copper Sulfide Ore Started with Only Water Irrigation

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