Marcos Bueno

Marcos Bueno
University of Oulu · Oulu Mining School

Doctor of Philosophy

About

21
Publications
18,084
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51
Citations
Introduction
Marcos has twelve years of work and research experience in the fields of mining and mineral processing engineering. He possesses an in-depth knowledge on the design and optimisation of comminution circuits as well as geometallurgy. Marcos has completed his PhD degree specialising in multi-component autogenous and semi-autogenous grinding. He has carried out extensive comminution circuit surveys as well as pilot plant campaigns both in Australia and internationally. He has been involved in technical studies related to most key mining commodities – gold, aluminium, copper, iron ore, nickel, platinum and potash/phosphate. He also has experience in commissioning.

Publications

Publications (21)
Article
The mining industry needs a low-cost and reliable breakage characterization test which can rapidly process a large number of samples for geometallurgical modelling. The more samples are tested, the better is the understanding of the ore hardness variability and lower the design or production risks. The proposed solution is a new testing device, her...
Conference Paper
Lifelong development of skills and knowledge of mining professionals has been recognised worldwide as a challenge for the development of a sustainable mining sector. Practical training and learning over the mine value chain are among the key components of this knowledge building. However, the number of available mining sites for continuous educatio...
Conference Paper
Comminution tests are an essential element in the design of ore beneficiation plants. Many methods have been developed to assess the breakage characteristics of rocks to generate parameters for modelling. However, most of the existing methods are laborious, expensive and require large samples. Consequently, test work has been traditionally conducte...
Conference Paper
Full-text available
Training and lifelong learning of mining industry professionals over the value chain of critical raw materials has been recognised worldwide as a challenge for the development of a strong raw materials mining sector. Nevertheless, the number of available mining sites for continuous practical education is limited, while also the specifications for p...
Article
Full-text available
In an extremely competitive mining industry, onsite experience is a big advantage. Mining education at the universities is mostly focused on theoretical studies without a possibility of practical training in mining sites. Hence, experimental mines suitable for practical education are needed to provide a platform for systematic research and educatio...
Conference Paper
Full-text available
In an extremely competitive mining industry, onsite experience is a big advantage. Mining education at the universities is mostly focused on theoretical studies without a possibility of practical training in mining sites. Hence, experimental mines suitable for practical education are needed to provide a platform for systematic research and educatio...
Conference Paper
Full-text available
This paper demonstrates the selection of grinding circuit technology for a number of recent projects including discussion of the key drivers and the role of energy efficiency. Decreasing head grades combined with a strong and sustained increase in operating costs has forced miners to examine increased project size, increased equipment capacity and...
Conference Paper
Full-text available
Autogenous (AG) and semi-autogenous (SAG) grinding mills are considered a mature technology, so why are we seeing a number of recent projects not achieving nameplate capacity and is SAG technology losing market confidence, particularly in financial circles? This paper presents a critical review of underperforming AG/SAG mills based on public domain...
Conference Paper
Full-text available
Ore characterization is integral to any flowsheet development and equipment selection. There are risks to the overall flowsheet development if sufficient feed material is not characterized adequately representing the overall mine plan. The paper highlights some potential issues and opportunities to improve some of the commercial characterisations t...
Conference Paper
Full-text available
Every comminution testwork program should include the appropriate ore characterisation tests to describe the variability of ore breakage properties, but there are several ways to interpret the data and define the design criteria for a project. The most simplistic way is to adopt an arbitrary value, such as the 80 th percentile ore properties. This...
Chapter
Several methodologies have been developed for designing crushing and grinding mills. Bond’s method is widely used for predicting the energy requirement of crushers, rod and ball mills, while a number of other methodologies have been proposed for AG/SAG mills. Each methodology involves different laboratory tests to determine the material grindabilit...
Article
Full-text available
With the increasing depletion of high-grade ore deposits, smarter mineral processing solutions are required to achieve sustainable and economic methods for mining and processing low-grade deposits. In order to make the treatment of low-grade deposits economically viable, large quantities of rock need to be mined and processed. The associated infras...
Conference Paper
Full-text available
Ausgrind is Ausenco's in-house program used for power-based comminution calculations. Proprietary calculations have been developed and reconciled with unit process operation and benchmarked with plant performance. Ore breakage data from characterization and variability testwork, equipment geometry, flowsheet configuration, efficiency factors and op...
Article
Full-text available
The JKMRC has been studying and modelling industrial AG and SAG mills for over 40 years, but the ability to simulate the effects of blending hard and soft components on mill performance remains quite limited. In an effort to quantify these effects for modelling purposes, a series of laboratory, pilot scale and full scale tests, using multi-componen...
Conference Paper
Full-text available
The commonly used SAB, SABC and run-of-mine (ROM) ball mill circuits can achieve high throughputs with good operating stability. However, these circuits consume a substantial amount of grinding media, which can have a substantial impact on the OPEX and the ‘carbon footprint’, specifically when viewed as an ‘embodied’ energy input. On the other hand...
Conference Paper
Full-text available
In a recent publication (Bueno and Lane, 2011) we presented the analysis of a consolidated dataset composed by 134 AG/SAG mill pilot trials. By comparing the measured data against theoretical specific energy consumption, the analysis indicated which circuit configurations are more or less energy efficient. However, the analysis has also indicated t...
Conference Paper
Full-text available
The control of AG mills fed by ores with harder and softer components can be challenging due to the sensitivity of the mill to the ratio of hard to soft components. The mills at LKAB's iron ore operations are generally well controlled, but there are periods when the throughput falls off dramatically, due to a loss of mill filling. As the ore is upg...
Conference Paper
Full-text available
Between 1993 and 2003, a series of AG and SAG mill pilot plant trials were conducted using Hardinge Ical pilot plant scale SAG mills on numerous ore samples and ranging across a wide variety of operating conditions. The data from these tests were used to evaluate the design of SAG and AG mill circuits for over a dozen projects, of which about half...
Conference Paper
Full-text available
2 MULTI-COMPONENT AUTOGENOUS PILOT TRIALS ABSTRACT A pilot scale AG milling campaign was conducted at the AngloAmerican Platinum pilot plant in South Africa. Different blends of hard:soft (silicate:chromite) and coarse:fine particles in the AG mill fresh feed were tested. The effects of multi-component feed on the pilot scale autogenous grinding ar...
Article
Full-text available
AG/SAG mill feed often contains several components which may have different hardness or SG. The hard component may act as grinding media to break the soft component and remain in the mill the longest. The build up or absence of a high SG component when the AG/SAG mill is treating a multi-component feed can cause the mill power prediction to be sign...
Thesis
Trabalho de formatura do curso de graduação do Departamento de Engenharia de Minas e de Petróleo da Escola Politécnica da Universidade de São Paulo.

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Projects

Projects (3)
Project
In an extremely competitive mining industry, the onsite experience is considered as a big advantage even for recruitment to entry level positions. The MINETRAIN project proposes to develop training programs for people working in mining and related disciplines. The learning goals of the MINETRAIN project are that learners have the skills for sustainable management of any phase of sustainable mining operations - from exploration and discovery of the mineral resource, through a feasibility study, mine design, development of plans, production and process operations to mine closure.