Untitled in english

Author(s)

Ana Carolina Chieregati

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Escola Politécnica (EP/BC)
• Defense date: 2001-09-25

Examining board members

Homero Delboni Junior; Rupen Adamian; Luis Marcelo Marques Tavares

• Advisor: Homero Delboni Junior

Abstract

Today\'s extensive use of autogenous (AG) and semi-autogenous (SAG) mills in industrial grinding circuits is credited to the combination of relative high throughput and compaction of their physical installations. However, the design of comminution circuits and equipments mainly rely on empirical techniques, which are case-specific. A further limitation on current design techniques is attributed to the large amount of samples needed to the assessment of ore characteristics, even in the early stages of design. The main objective of the thesis is to develop and validate a complementary method to characterize ores for comminution purposes, based on reduced amount and size of samples. The data obtained for a number of different ores were used to simulate the operation of AG/SAG mills and the results were tested on the basis of the deviations and the respective statistical techniques adopted. The conclusions show the validity and associated limits of the proposed method, as well as its predictive capacity for the design of AG/SAG mills. (AU)