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What are the primary raw materials for iron extraction and their iron content (in weight percent)?
Magnetite (72,4%), Hematite (70%), and Limonite (50-60%)
Which mineral is the main raw material for aluminum extraction and its aluminium content (in weight percent)?
Bauxite (ca. 30%Al)
What size is needed for a Fe particle for charging?
10-30mm
What is the most productive crusher?
Gyrator crusher
What is the cylce for high quality ores?
crushing
screening
What is the cylce for low grade ores?
Crushing
Screening
Concentrating
Milling
Concentration
Agglomeration
What is meant by the process of screening?
The seperation of coarse and fine ore particles
What is the usual amount of crushers in a chain?
2-3
Name two primary tungsten raw materials and their tungsten content (in weight percent)?
Scheelite (64% W) and Wolframite (ca
60%W)
How is 'Ore' defined in extractive metallurgy?
An ore is a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably
What is 'Gangue' in metallurgy?
Gangue refers to the unwanted materials or impurities that accompany ore minerals.
What is involved in the beneficiation of crude iron ores?
Beneficiation includes processes like crushing, grinding, and separating useful minerals from gangue.
How is iron ore prepared for a blast furnace?
By sizing, which includes crushing and screening to obtain the appropriate particle size.
What are the main types of crushers used in ore processing?
Gyratory, jaw, and cone crushers.
What techniques are used for concentrating iron oxide?
Magnetic separation and flotation.
What is the purpose of milling in ore processing?
Milling reduces the particle size of ore, facilitating further processing and making the product chargeable for the furnace.
What is the impact of crushing and milling on energy consumption?
These processes are energy-intensive, contributing significantly to the overall energy consumption in metallurgy.
What is agglomeration in metallurgy?
Agglomeration involves combining small particles into larger, more workable aggregates.
How does a blast furnace function?
A blast furnace reduces iron ore to iron using a combination of heat and reducing agents.
What is pelletizing in the context of fine ores?
Pelletizing involves forming fine ore particles into spherical pellets for easier handling and processing.
What is the sintering process in metallurgy?
Sintering involves fusing iron particle fines into a porous mass for use in the blast furnace.
How does equipment wear affect milling processes?
Equipment wear can lead to inefficiency, increased maintenance costs, and downtime.
What is the primary goal of crushing in ore processing?
To reduce the size of ore for subsequent processing stages.
Describe the role of screening in beneficiation.
Screening separates particles based on size to ensure uniformity for further processing.
Last changeda year ago