Banca de QUALIFICAÇÃO: ANTONIO FERNANDO MARTINS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ANTONIO FERNANDO MARTINS
DATE: 17/04/2023
TIME: 18:00
LOCAL: Sala 702, CEFETMG ARAXÁ
TITLE:

ANALYSIS OF THE TECHNICAL FEASIBILITY OF DRY SCREENING OF PYROCHLORINE ORE (ROM)

KEY WORDS:

Sieving, sizing, natural humidity, screens

PAGES: 121
BIG AREA: Engenharias
AREA: Engenharia de Minas
SUBÁREA: Tratamento de Minérios
SPECIALTY: Equipamentos de Beneficiamento de Minérios
SUMMARY:

Vibrating screens are equipment widely used in mineral beneficiation circuits in various functions, in primary separation processing large blocks or even fine scalping for a crusher, it can also be used in a dewatering process, processing slurries. Ore screening is still a process marked by a scarce volume of specific information and little research carried out. Most of the models and relationships between known variables and parameters have emerged from laboratory tests or based on trial and error in industrial experience. Although screening functions are easy to understand, the process for sizing and selecting equipment is very complex. When material humidity is considered high, the calculations may have many deviations and simply not work. This work proposes to survey the conditions of the ROM ore (run-off-mine) making its correlation with the development parameters of screens for screening in natural humidity and verify if this screening can be viable under these conditions. Initially, the specific mass of the ore, shape index, post-blasting moisture and granulometric distribution were determined. Initially, the specific mass of the ore, shape index, post-blasting moisture and granulometric distribution were determined. Subsequently, the size of the sieve was carried out using empirical methods. Finally, it was raised how new technologies can help in this screening. Dimensional data of these equipment, operational variables and the material itself were used to calculate the dimension of an ideal sieve, using classic sieving methods. Two methods were used for this work, the Allis-Chalmers method resulting in an area of 13.5 m² and the Peter King method (MPK) resulting in an area of 19.13 m². A scalping screen with a smaller area can be used, but with a reduction of the screening efficiency to 82%. The dry sieving of the material is technically feasible within the suggested screen opening and according to the proposed technologies such as banana sieve, elliptical movement and use of self-cleaning screens.

COMMITTEE MEMBERS:
Presidente - FABIO DE SAO JOSE
Interna - MICHELLY DOS SANTOS OLIVEIRA
Externo à Instituição - RAFAEL DE SOUZA RODRIGUES
Externo à Instituição - LEANDRO DIAS DA SILVA