Year-end Sale % OFF 
Abstract
Abstract Pre-concentration consists of the preliminary discarding of a fraction of the mineral processing plant feed which contains little or none of the mineral of interest, reducing the mass to be processed in downstream operations (e.g. milling, concentration and dewatering), as well as the capital and operational costs. In this context, this study investigates the performance of density and sensor-based sorting separation methods in the removal of carbonate gangue of a zinc ore, in size fractions typical of crusher products, using sink and float tests with heavy liquids, jig stratification and laboratory scale ore sorting tests using an X-Ray Transmission (XRT) sensor. The best results were obtained through sink and float in heavy liquids, which indicated the possibility of discarding 30% of the feed mass, removing over 60% of the carbonates (CaO and MgO) and losing only 2% of the zinc. The ore sorting tests also presented positive results, with approximately 93% of metallurgical recovery in 70% of the mass for both size fractions tested. The jig stratification results were worse, since the zinc content discarded with this method was high. The results indicate significant reduction potential for Capex and Opex costs using pre-concentration strategy.
Highlights
The main challenges of modern concentration plants are related to several issues (Härkki, 2014), which include the following: i
The mass tests, and the rest of the initial sample was of sample collected obeyed the criteria of crushed to the size fraction -25 +1.18 mm sample size according expression based for the jigging and sink and float tests; on Gy’s theory give in Napier-Munn nearly 5 kg of the size fraction -25 et al, (1996, p.98)
The dolomite is extremely damaging to the industrial process, especially in the hydrometallurgy steps, in which leaching willemite efficiency is compromised by the high concentrations of this material
Summary
The main challenges of modern concentration plants are related to several issues (Härkki, 2014), which include the following: i. Processing of ores that contain increasingly lower grades and complex mineralogical associations demands liberation into finer size fractions, which requires more elaborate comminution operations and various stages of concentration, increasing the installation and operating costs of the plant. Low grade ores generate large amounts of tailings, which are usually stored in dams subject to the risk of rupture and have high capital and operating costs. Water scarcity; the necessity to accomplish the legal requirements and the expenses for the use of water, will directly influence mineral production. Wherever possible, the water used in the process must be recycled and reduced, helping to eliminate "fresh water" consumption and costs
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
