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Full-Text Articles in Metallurgy
Anaerobic Reductive Bioleaching Of Manganese Ores, Neha Sharma
Anaerobic Reductive Bioleaching Of Manganese Ores, Neha Sharma
Dissertations, Master's Theses and Master's Reports
The increasing demand of manganese in the industries and various hindrances in its production from low grade ores by conventional method has made it imperative for researchers around the world to develop a method of manganese extraction from low grade ores that is both environment friendly and economical. Bioleaching has shown significant potential in manganese extraction and efficiencies of extraction have been found to be 70-98% with the help of various bacteria and fungi.
This study focuses on extraction of manganese with the help of mixed bacterial strains that have been collected from their natural anaerobic environment. The extraction of …
New Horizons For Processing And Utilizing Red Mud, M. Archambo
New Horizons For Processing And Utilizing Red Mud, M. Archambo
Dissertations, Master's Theses and Master's Reports
Red mud is an industrial slurry waste that is produced as a byproduct of the Bayer process for alumina. The waste is generated in large quantities, up to a ratio of 2:1 against the valued product alumina. Red mud exhibits many chemical and physical properties that categorize it as a hazardous material. Due to the addition of sodium hydroxide in processing, the pH is typically at values close to 13. Small particle size discourages separation from water for disposal, so drying red mud happens over many years.
The pH of red mud can be reduced with inexpensive reagents. Carbon dioxide …
Controlling Properties Of Agglomerates For Chemical Processes, Joseph A. Halt
Controlling Properties Of Agglomerates For Chemical Processes, Joseph A. Halt
Dissertations, Master's Theses and Master's Reports
Iron ore pellets are hard spheres made from powdered ore and binders. Pellets are used to make iron, mainly in blast furnaces. Around the time that the pelletizing process was developed, starch was proposed as a binder because it’s viscous, adheres well to iron oxides, does not contaminate pellets and is relatively cheap. In practice, however, starch leads to weak pellets with rough surfaces – these increase the amount of dust generated within process equipment and during pellet shipping and handling. Thus, even though the usual binder (bentonite clay) contaminates pellets, pelletizers prefer it to starch or other organics.
This …