| | Developing Iron Ore Projects and the Relevance to Iron Making The challenges of developing iron ore projects includes proving a resource, characterising it and ensuring the product meets the specifications of the customers. other issues such as rail access, port and infrastructure plus the ability to raise project finance. Reserves of high-grade iron ores are reducing all over the world, at an alarming rate, over the years as a result of the rapid increase in demand for steel particularly from Japan and then China. The recovery of mineral value from the low-grade ores using present technology is more expensive than DSO ores due to high energy and capital costs. Beneficiation is defined as “a variety of processes whereby extracted ore from mining is reduced to particles that can be separated into mineral and waste, the former suitable for further processing or direct use.” Various physical properties of an ore can be exploited to separate a low grade fraction including variation in hardness, density, reflectance, conductivity and magnetism. “Beneficiation” of iron ores includes concentration, generally by physical removal of unwanted gangue. Also considered beneficiation is the regulation of product size, or other steps such as agglomeration to improve its chemical or physical characteristics prior to smelting. Recently beneficiation techniques for iron ores are receiving world-wide attention due to fast utilisation of upgraded ore. This paper describes an overview of common techniques for iron ores beneficiation including secondary processing such as sintering, pelletising, coal and coke fundamentals, iron and steel making, testwork and quality. In addition, reference to critical market aspects, financing large projects and the role of Chinese investors is addressed About your leader: Damian Connelly – Director/Principal Consulting Engineer, Mineral Engineering Technical Services, METS Damian has over 40 years experience as a Consulting Metallurgist. He has extensive experience in the gold, copper, lead, zinc, uranium and iron ore industries. He has authored over 36 technical papers and his field of expertise lies in plant operations, feasibility studies, detailed design, and commissioning. He has been involved in many projects including engineering, audit, due diligence, tenders and expert witness work. |