Calcination of the Turkish manganese ore from Denî zlî -Tavas region
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Middle East Technical University
 
 
Publication date: 1998-01-01
 
 
Physicochem. Probl. Miner. Process. 1998;32(1):203-213
 
ABSTRACT
The production of steel and high demand for ferro-manganese used in the Turkish iron and steel industry increases every year. In Turkey, there are some important ore reserves of manganese, especially in the Denîzlî-Tavas region. However, this carbonated ore body has relatively low content of manganese which is about 31% Mn. The aim of this work was to calcine the fore-mentioned ore to increase its manganese content and so make it more suitable to carbothermic reduction in a furnace for ferro-manganese production. The main parameters studied were temperature of calcination, duration of calcination and size of ore. The results showed that, although a temperature of 700°C was enough to calcine a sample ground finely to –74 microns, for the calcination of an ore crushed to about 1 mm grain size a temperature of 900°C and 1 hour duration would be more suitable industrially. Under these conditions, the weight loss of the sample was about 15.5% and its manganese content increased to 36%.
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