Hardgrove testing as a tool for ore physical characterization in the of vertical stirred mills

• Grant number: 21/11923-9
• Support Opportunities: Scholarships abroad - Research
• Start date: February 10, 2022
• End date: February 09, 2023
• Field of knowledge: Engineering - Mining Engineering - Ore Beneficiation
• Principal Investigator: Maurício Guimarães Bergerman
• Grantee: Maurício Guimarães Bergerman
• Host Investigator: Bern Klein
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: University of British Columbia, Vancouver (UBC), Canada
• Associated research grant: 19/11866-5 - Development of innovative processes for the recovery of critical metals, AP.TEM

Abstract

In the field of secondary grinding or regrinding, the concern about energy efficiency is of great importance. As a general rule, the specific consumption in this stage is higher than that in the primary grinding stage. Moreover, it has been noticed a trend toward finer grinding size in new metal ore processing projects, leading to an increasing expenditure at this stage, both in terms of capital and operating costs. In Brazil, new projects that include a regrinding stage have required regrinding product size around 40 to 20 µm. The estimation of energy and particle size distribution of the products of such fine grinding is not trivial and has not yet established methodology. This project aims to develop an ore physical characterization methodology for modeling - empirical and phenomenological - of vertical stirred mills applied to regrinding, with a view to its sizing and optimization, when there is limited mass availability. For this purpose, a Hardgrove mill equipped with a torque measuring system will be used. To validate the model will be used at least four ore samples from different regrinding circuits in Brazil. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BERGERMAN, MAURICIO GUIMARAES; PAMPARANA, GIOVANNI; DELBONI, HOMERO; KLEIN, BERN. Development of a simplified test for the determination of the Bond Ball Mill Work Index using a modified Hardgrove test. MINERALS ENGINEERING, v. 203, p. 9-pg., 2023-09-08. (21/11923-9, 19/11866-5)

SANCHES, JULIA GUIMARAES; BERGERMAN, MAURICIO GUIMARAES; DELBONI JR, HOMERO; LIMA, NEYMAYER. Study on Partial Replacement of Metal Grinding Ball with Pebbles When Grinding Itabirite Ores. MINERALS, v. 13, n. 4, p. 12-pg., 2023-04-01. (21/11923-9, 19/11866-5)

ANDRÉ HIROSHI ASAKAWA; MAURÍCIO GUIMARAES BERGERMAN; ARTHUR CHAVES. Evaluation of the crushing method impact on the mineral liberation in pre-concentration circuits. REM, Int. Eng. J., v. 77, n. 2, 2024-04-19. (19/11866-5, 21/11923-9)