Fundamental understanding of flotation of hexagonal pyrrhotite and millerite to improve the quality of ni-cu concentrates

浮选六方磁黄铁矿和针铁矿提高镍铜精矿质量的基本认识

• 批准号: 500716-2016
• 负责人: Liu, Qingxia
• 金额: $ 12.89万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618147
• 关键词: Fundamental; understanding; flotation; hexagonal; pyrrhotite

Nickel is one of important metals widely used in alloy, battery, catalyst, coin, and electronic device, just to name a few. The nickel sulphide minerals of economic interest include pentlandite ((NiFe)9S8) and millerite, which are associated with a greater abundance of pyrrhotite (Fe8S9). Chalcopyrite is typically associated with nickel sulphide minerals that must be separated to a copper bearing concentrate with low nickel grades to facilitate efficient copper smelting.The selective separation of pyrrhotite from pentlandite and millerite is critically important for the economics and downstream nickel smelting and refining. The iron and sulphur levels in concentrate must be controlled to reduce the amount of Sulphur dioxide produced in smelting to avoid negative environmental impacts. The selective separation of monoclinic pyrrhotite from pentlandite has been effective by magnetic separation and low redox potential flotation. Recently, ores from the Sudbury Basin have contained a larger proportion of hexagonal pyrrhotite. This form of pyrrhotite has stronger flotation kinetics to that of the monoclinic variety and has not responded to the conventional pyrrhotite rejection techniques. Our objective in this part of research is to fundamentally understand the role of metal ions such as copper and nickel on the activation of hexagonal pyrrhotite or deactivation of hexagonal pyrrhotite in the presence of depressants such as diethylenetriamine (DETA), Dextrin, lignosulphonate, thiosulphate, and lime under controlled electrochemical conditions. The success of this project will strengthen Canada's leadership role in sustainable development and keep Canada in the forefront of new technology development that will not only benefit our society, our economy, but also our environment.

镍是广泛应用于合金、电池、催化剂、硬币和电子设备等领域的重要金属之一。具有经济价值的硫化镍矿物包括镍黄铁矿 ((NiFe)9S8) 和针铁矿，它们与大量的磁黄铁矿 (Fe8S9) 相关。黄铜矿通常与硫化镍矿物伴生，必须将其分离为低镍品位的含铜精矿，以促进高效的铜冶炼。从镍黄铁矿和针铁矿中选择性分离磁黄铁矿对于经济和下游镍冶炼和精炼至关重要。必须控制精矿中的铁和硫含量，以减少冶炼过程中产生的二氧化硫量，避免对环境造成负面影响。通过磁选和低氧化还原电位浮选，可以有效地从镍黄铁矿中选择性分离单斜磁黄铁矿。最近，萨德伯里盆地的矿石中含有较大比例的六方磁黄铁矿。这种形式的磁黄铁矿比单斜晶系的磁黄铁矿具有更强的浮选动力学，并且对传统的磁黄铁矿剔除技术没有反应。我们这部分研究的目的是从根本上了解铜和镍等金属离子在二乙烯三胺（DETA）、糊精、木质素磺酸盐、硫代硫酸盐等抑制剂存在下对六方磁黄铁矿活化或六方磁黄铁矿失活的作用。和石灰在受控的电化学条件下。该项目的成功将加强加拿大在可持续发展方面的领导作用，并使加拿大保持在新技术开发的前沿，这不仅有利于我们的社会、经济，而且有利于我们的环境。