This paper summarizes the experience of decreasing electricity consumption and energy saving of 3000kVA elcetric furnace which put into operation in 1991 in dongxi angqiao manganese mine, sach as selection of reasonable technological parameters and technological equipments, improvement of operation regulations and take care of feeding, maintainance and operation.
It analyses the change and developing tendency of steel output,Mn alloys output and Mn ore resources in Asia and in the world,it describes their influence on the developement of Mn alloy's production in China.
It is necessary to intensify works on the improvement of concentration technique for manganese ores and to carry out the marketing study of the expediency of replacing imported manganiferous concentrates by those obtained from the Uralian ores.
Under and climate conditions the chemical weathering of manganese ores is governed by the fugacities of O2, CO2 and S2 in the atmosphere and soils.
Coronadite from the manganese ores of Dongari Buzurg and Kodur, india
Lateritic manganese ores have formed from sedimentary (metamorphically altered) manganese protores (gondites, rhodochrosites) which in some cases can be mined without having undergone laterization.
The manganese ores on Groote Eylandt occur in a flat-lying horizon in a series of Lower Cretaceous sands and clays which overly unconformably the Middle Proterozoic sandstone basement.