UP-GRADING OF AGBADO-OKUDU IRON ORE USING MAGNETIC SEPARATION AND SHAKING TABLE TECHNIQUES
UP-GRADING OF AGBADO-OKUDU IRON ORE USING MAGNETIC SEPARATION AND SHAKING TABLE TECHNIQUES
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Date
2006-11
Authors
AGAVA, ABDULLAHI ABDULRASHEED
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Abstract
The beneficiation of the Agbado Okudu iron ore deposit located in
Kogi State, Nigeria was investigated. The investigation involved
determining the chemical composition and mineralogical characteristics of
the run-of-mine. Followed by determination of the work index of the ore
and then separation tests using shaking table, magnetic technique and a
combination of the two techniques. The results of the tests carried out
revealed that the Agbadu okudu iron ore contained on the average a total
iron content (38.82% FeT), 49.10% (Si02) and other element. Thin sections
of the ore sample examined under polarized light revealed that the iron
bearing minerals are predominantly magnetite and hematite with a
combined average percentage distribution of 69% and the mineral in
abundant after the iron bearing minerals is quartz. The grindability test
reveals that the Agbado Okudu iron ore has and average work index of
about 4.32 kwh/tonne. The results of gravity separation shows that a
concentrate with a maximum grade of 55.81% (FeT), and a recovery of
66.40% at particle size fraction -56 + 45m could be produced. While
magnetic separation alone produced a concentrate with an optimum grade of
57.43% (FeT), and a recovery of 82.12% at particle size fraction of –
80+63m. However, combination of gravity separation technique (shaking
table) followed by magnetic separation technique could only produce a
concentrate with an optimum grade of 57.17% (FeT), and a recovery of
80.85% at a particle size fraction of –63+53m. Hence, based on the results
obtained from the concentration tests, the Agbado Okudu iron ore deposit
can be best beneficiated using magnetic technique to produce a concentrate
that can serve as feed for pig iron production by conventional blast furnace
route.
Description
A THESIS SUBMITTED TO THE POST-GRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, ZARIA.
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE
AWARD OF THE DEGREE OF MASTER OF SCIENCE IN
METALLURGICAL ENGINEERING.
NOVEMBER, 2006
Keywords
UP-GRADING, AGBADO-OKUDU IRON ORE, MAGNETIC SEPARATION, SHAKING TABLE TECHNIQUES