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Mineral Processing

Description: This quiz covers the fundamental concepts and processes involved in mineral processing.
Number of Questions: 15
Created by:
Tags: mineral processing mining engineering metallurgy
Attempted 0/15 Correct 0 Score 0

What is the primary objective of mineral processing?

  1. To extract valuable minerals from ores

  2. To refine and purify minerals

  3. To dispose of waste materials

  4. To recycle minerals


Correct Option: A
Explanation:

Mineral processing aims to separate valuable minerals from ores, which are naturally occurring mixtures of minerals and gangue (waste materials).

Which of the following is a common method for separating minerals based on their size?

  1. Flotation

  2. Gravity separation

  3. Magnetic separation

  4. Hydrometallurgy


Correct Option: B
Explanation:

Gravity separation utilizes the differences in density between minerals to separate them. Heavier minerals settle at the bottom, while lighter minerals remain suspended.

What is the purpose of crushing and grinding in mineral processing?

  1. To reduce the size of ores

  2. To liberate valuable minerals from gangue

  3. To increase the surface area of minerals

  4. All of the above


Correct Option: D
Explanation:

Crushing and grinding are essential steps in mineral processing to reduce the size of ores, liberate valuable minerals from gangue, and increase the surface area of minerals for subsequent processing.

Which of the following is a common method for separating minerals based on their magnetic properties?

  1. Flotation

  2. Gravity separation

  3. Magnetic separation

  4. Hydrometallurgy


Correct Option: C
Explanation:

Magnetic separation is a process that utilizes the magnetic properties of minerals to separate them. Magnetic minerals are attracted to a magnetic field, while non-magnetic minerals are not.

What is the role of flotation in mineral processing?

  1. To separate minerals based on their surface properties

  2. To remove impurities from minerals

  3. To concentrate valuable minerals

  4. All of the above


Correct Option: D
Explanation:

Flotation is a process that separates minerals based on their surface properties. It involves adding chemicals to the mineral mixture, which selectively attach to the surfaces of valuable minerals. These minerals are then carried to the surface of the flotation cell by air bubbles, while gangue minerals remain suspended in the water.

Which of the following is a common method for separating minerals based on their chemical properties?

  1. Flotation

  2. Gravity separation

  3. Magnetic separation

  4. Hydrometallurgy


Correct Option: D
Explanation:

Hydrometallurgy involves the use of aqueous solutions to dissolve and extract valuable metals from ores. This process is commonly used for metals such as copper, zinc, and gold.

What is the purpose of roasting in mineral processing?

  1. To remove impurities from ores

  2. To convert minerals to oxides

  3. To reduce the size of ores

  4. To increase the surface area of minerals


Correct Option: B
Explanation:

Roasting is a process that involves heating ores in the presence of air to convert sulfide minerals to oxides. This process is often used to remove impurities and prepare ores for subsequent processing.

Which of the following is a common method for separating minerals based on their specific gravity?

  1. Flotation

  2. Gravity separation

  3. Magnetic separation

  4. Hydrometallurgy


Correct Option: B
Explanation:

Gravity separation utilizes the differences in specific gravity between minerals to separate them. Heavier minerals settle at the bottom, while lighter minerals remain suspended.

What is the role of leaching in mineral processing?

  1. To dissolve valuable minerals from ores

  2. To remove impurities from minerals

  3. To concentrate valuable minerals

  4. All of the above


Correct Option: A
Explanation:

Leaching involves the use of chemical solutions to dissolve valuable minerals from ores. This process is commonly used for metals such as copper, zinc, and gold.

Which of the following is a common method for separating minerals based on their electrical properties?

  1. Flotation

  2. Gravity separation

  3. Magnetic separation

  4. Electrostatic separation


Correct Option: D
Explanation:

Electrostatic separation utilizes the differences in electrical properties between minerals to separate them. Charged minerals are attracted to oppositely charged electrodes, while uncharged minerals are not.

What is the purpose of smelting in mineral processing?

  1. To remove impurities from ores

  2. To convert minerals to metals

  3. To reduce the size of ores

  4. To increase the surface area of minerals


Correct Option: B
Explanation:

Smelting is a process that involves heating ores to high temperatures to melt and separate metals from impurities. This process is commonly used for metals such as iron, copper, and aluminum.

Which of the following is a common method for separating minerals based on their size?

  1. Flotation

  2. Gravity separation

  3. Magnetic separation

  4. Screening


Correct Option: D
Explanation:

Screening involves passing ores through screens with different mesh sizes to separate minerals based on their size. Larger minerals are retained on the screen, while smaller minerals pass through.

What is the role of beneficiation in mineral processing?

  1. To improve the quality of ores

  2. To remove impurities from ores

  3. To concentrate valuable minerals

  4. All of the above


Correct Option: D
Explanation:

Beneficiation is a general term that refers to the processes used to improve the quality of ores by removing impurities, concentrating valuable minerals, and increasing the overall value of the ore.

Which of the following is a common method for separating minerals based on their surface properties?

  1. Flotation

  2. Gravity separation

  3. Magnetic separation

  4. Hydrometallurgy


Correct Option: A
Explanation:

Flotation involves the use of chemicals to selectively attach to the surfaces of valuable minerals, causing them to float to the surface of a liquid while gangue minerals remain suspended.

What is the purpose of tailings in mineral processing?

  1. To dispose of waste materials

  2. To recover valuable minerals

  3. To improve the quality of ores

  4. None of the above


Correct Option: A
Explanation:

Tailings are the waste materials generated during mineral processing. They consist of gangue minerals, impurities, and other unwanted materials that are separated from the valuable minerals.

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