This is a practical course; the solution of practical exercises is oriented to give the numerical techniques applied in metallurgical balances which is the fundamental of specialized software. Using methods for checking of correctness of material balance of separation operations, quality control with correction of errors in operation conditions.
Today, data acquisition and mass balancing are increasingly computerized and automated. Mass balancing or accounting is critical to many responsibilities of the metallurgical team of any mineral or metal processing plant: troubleshooting/improving/assessing plant performance, monitoring/controlling plant operation, accounting.The mass balance made with original data (throughput, assay, size fraction, etc) is generally incoherent and inconsistent due to the errors of the data used (measured or estimated).Methods for checking of correctness of material balance of separation operations, quality control with correction of errors in operation conditions i.e. flows and chemical assays used on balances need to be minimized to obtained reliable results (as balances are sensitive i.e. to the accuracy of metal assays), therefore adjustment methods are necessary to minimize errors in grades and distribution in the products of a concentration plant and assess its efficiency. Those will be learned during this course.Professionals working in mineral processing should manage metallurgical accounting techniques and the calculations to make decisions about the operation, sampling, assays. This course prepare participants to use later more advanced techniques and specialized methods such as VBA, MATLAB o Python could be applied.This course is an introduction to balances that could be done in other circuits of the plant, but the focus is on the flotation circuit and overall balance. The second part of a course will be programmed later for classification and grinding circuits.
1. Introduction to metallurgical calculation with Microsoft Excel
2. Metallurgical Balances2.1. Classical or algebraic balanceo for two products (one concentrate and one tailing)o three products (two concentrates and one tailing)2.2. Matrixial o Introduction of matrixial calculationso Four products (three concentrates and one tailing)2.3. Balance by nodal method2.4. Balance from mineral to metal
3. Balances from batch to continuous3.1 Close Cycle tests3.2 Split factors form lab to plant
4. Introduction to SOLVER tools4.1 Kinetic balance: cumulative grades and recoveries4.2 Adjustment of kinetic models García-Zuñiga, Klimpel, Agar, Kesall with excel and solver
5. Adjustment for metal accounting and control of operational data5.1 Correction on chemical assays in metallurgical balances with Solver and integration factor5.2 Method Smith Ichiyen5.3 Correction on chemical assays in metallurgical balances with residual weight and Lagrange multipliers techniques
Objectives and outcomes
After the course the professional in Mineral Processing and Metallurgical Engineering and / or related will be able to
Maria Sinche-Gonzalez is a Senior University Lecturer at the University of Oulu working in the unit of Oulu Mining School. She is a doctor and engineer in Mineral Processing from the University of South Australia and University San Agustin de Arequipa respectively. She has more than twelve years of experience in the mining industry working in several companies such as Panamerican Silver in the Quiruvilca and Huaron mines, Trafigura Group in Condestable mine, in Newmont-Yanacocha mine and for BHP Billiton in the Olympic Dam mine - AMIRA Project. Maria is working in research and teaching for 13 years and has worked at the University of South Australia, at the Technical University of Lulea in Sweden and currently works in research and teaching at the University of Oulu in Finland. Her expertise is in sulphide flotation, metal accounting and modelling and simulation of separation processes.
5 days course (4 pedagogical hrs/day) November 23 - November 24 from 12:00 - 15:30,November 29 - December 01 from 12:00 - 15:30