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1. (WO2017035613) GRINDING- ROLLS FOR ORE AND METHOD FOR OBTAINING MAXIMUM EFFICIENCY

Pub. No.:    WO/2017/035613    International Application No.:    PCT/BR2016/000078
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Aug 17 01:59:59 CEST 2016
IPC: B02C 4/34
B02C 4/32
B02C 4/02
Applicants: VALE S/A
Inventors: SUBTIL, Renato Drescher
DANTAS, Luís Henrique Torres
Title: GRINDING- ROLLS FOR ORE AND METHOD FOR OBTAINING MAXIMUM EFFICIENCY
Abstract:
Description of grinding rolls for ore (1) composed of: two motors (6,6'}, one mobile roller (3), one fixed roller (2), hydraulic cylinders (4) and feeding column (5|. The grinding rolls (1) being provided with a means for controlling efficiency configured for making ongoing measurements and adjustments of their components aiming at reaching the maximum efficiency of the machine. A method for obtaining maximum efficiency of grinding rolls (1) is also described, which has the following steps: (i) determining the zero GAP; (ii) determining a set point that is equal to the optimum working point of the grinding rolls; (iii) automatic handling of pressure until the set point is reached.