权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

SBIR Phase I: A Novel Integrated Bioleaching Process for Chalcopyrite: An Alternative to Smelting

SBIR 第一阶段：黄铜矿的新型集成生物浸出工艺：熔炼的替代方案

基本信息

批准号：
9861136
负责人：
Gregory Olson
金额：
$ 9.3万
依托单位：
LITTLE BEAR LABORATORIES INC
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-01-01 至 1999-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9861136&HistoricalAwards=false
关键词：
SBIR Phase Novel Integrated Bioleaching

项目摘要

9861136 This Small Business Innovation Research Phase I project will evaluate a novel approach to biooxidize refractory chalcopyrite ore concentrates. Chalcopyrite is a sulfidic copper ore which has a negative environmental impact upon smelting due to SO2 production, but which has proven difficult to process by approaches such as biooxidation.The proposed work will evaluate leach rates from a chalcopyrite ore concentrate in a novel integrated bioleaching system. . The dissolution of chalcopyrite should be greatly accelerated due to system electrochemistry, favorable thermodynamics at elevated temperature, the presence of microbial Fe (II) and sulfur oxidizers, and control of particular operational parameters. Analytical techniques such as ESCA and SEM/EDX will be used to monitor reactions on pyrite and chalcopyrite surfaces. Metal solubilization will be monitored by inductively coupled plasma spectroscopy (ICP). The research objectives of this project are to verify the acceleration of copper leach rates and to demonstrate thermodynamic and electrochemical control of surface reactions under a defined set of system parameters. This investigation, if successful, would directly result in the development of a new process for utilizing reserves of refractory chalcopyrite ores. The potential market is estimated to be in the hundreds of millions of dollars. The technology could easily be integrated to scale with current mining practices and will substantially reduce the dependence of the mining industry on smelting.

9861136 这个小企业创新研究第一阶段项目将评估一种新的方法来生物氧化难处理的黄铜矿精矿。黄铜矿是一种硫化铜矿石，由于SO2的产生，对冶炼产生负面的环境影响，但已被证明难以通过生物氧化等方法进行处理。拟议的工作将评估黄铜矿精矿在新型综合生物浸出系统中的浸出率。 .黄铜矿的溶解应大大加快由于系统电化学，在高温下的有利热力学，微生物Fe（II）和硫氧化剂的存在下，和特定的操作参数的控制。分析技术，如ESCA和SEM/EDX将用于监测黄铁矿和黄铜矿表面的反应。将通过电感耦合等离子体光谱法（ICP）监测金属溶解。该项目的研究目标是验证铜浸出速率的加速，并证明在一组确定的系统参数下表面反应的热力学和电化学控制。这项研究如果成功，将直接导致开发一种新的方法来利用储量的难处理黄铜矿。据估计，潜在的市场规模将达到数亿美元。这项技术可以很容易地与目前的采矿做法大规模结合，并将大大减少采矿业对冶炼的依赖。