45 Questions
What is the purpose of crushing in mineral processing?
To break down large chunks of ore into smaller pieces
What type of crusher uses two plates to crush rocks by moving back and forth?
Jaw Crusher
What is the function of manganese steel surfaces in Cone Crushers?
To line the surfaces of the crusher
What is the purpose of milling in mineral processing?
To grind the ore into a fine powder
What is used as grinding media in a Rod Mill?
Long rods
What is the motion of the balls in a Ball Mill?
The balls grind the ore by tumbling within the mill
What is required for crushing and milling?
Significant amounts of energy
What is the primary reason why breaking rocks into fine powder is an energy-intensive process?
To break down chemical bonds that hold minerals in compound form
Which mineral is found in its pure form in nuggets and grains?
Gold
What is phosphate rock used directly for?
As a fertilizer or to make phosphoric acid
Which of the following rocks does not require crushing or milling for mineral extraction?
Phosphate rock
What is silicon dioxide used in?
The construction industry
Why is some coal washed and sorted into various sizes?
To make it more suitable for use as a fuel
What is the primary use of coal?
As a fuel for electricity generation or in the iron-making process
Which of the following minerals is not found in its pure form?
Phosphate
What is the analogy used to describe the distribution of mineral crystals in rocks?
Chocolate chips in a choc chip biscuit
Which of the following crushers breaks rocks by squeezing them between an eccentrically gyrating spindle and a concave hopper?
Cone Crusher
What is the purpose of the rods or balls in Rod Mills and Ball Mills?
To crush the ore into a fine powder
What is the difference between Rod Mills and Ball Mills?
The type of grinding media used
What is the result of the crushing and milling process?
Fine powder
Why are crushing and milling important steps in mineral processing?
To separate the minerals from the waste rock
What is the consequence of crushing and milling requiring significant amounts of energy?
The process becomes more energy-intensive
What is the reason why some minerals do not require extraction processes?
They are found in their pure form
Which of the following rocks can be used directly as a fuel?
Coal
What is the primary use of crushed rocks in mineral processing?
To extract minerals from compounds
What is the purpose of washing and sorting coal?
To create different sizes for various applications
What is the characteristic of minerals that are found in their pure form?
They do not require extraction processes
What is the purpose of breaking rocks down into fine powder?
To extract minerals from compounds
What is silicon dioxide used in?
The construction industry
What is the characteristic of phosphate rock?
It is used directly as a fertilizer
What is the primary purpose of the funnel in a Jaw Crusher?
To feed the rocks into the crusher
What is the main difference between the motion of the rods in a Rod Mill and the motion of the balls in a Ball Mill?
The rods tumble within the mill, while the balls move in a circular motion
Why is crushing and milling a significant step in mineral processing?
To access the mineral crystals distributed throughout the rocks
What is the primary function of the manganese steel surfaces in a Cone Crusher?
To protect the crusher from wear and tear
What is the result of the crushing and milling process?
Finer particles of ore
Why are Jaw Crushers typically used as the first step in mineral processing?
Because they can handle large chunks of ore
What is the main advantage of using steel balls as grinding media in a Ball Mill?
They are more durable than rods
What is the primary reason why some minerals are not found in their pure form?
They require breaking down of chemical bonds that hold them in compound form.
What is the characteristic of rocks that can be used directly for mineral extraction?
They do not require crushing or milling.
What is the main difference between gold and diamonds?
Gold is found in nuggets, while diamonds are found in crystals.
What is the primary reason why some coal is washed and sorted into various sizes?
To make it suitable for different applications.
What is the common characteristic of phosphate rock, silicon dioxide, and coal?
They can be used directly for mineral extraction.
What is the primary reason why breaking rocks into fine powder is an energy-intensive process?
It demands a lot of power to break down the chemical bonds.
What is the main purpose of mineral extraction?
To obtain minerals that are used in various industries.
What is the common characteristic of minerals that are found in their pure form?
They do not require crushing or milling.
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