Mineral Beneficiation Operations

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Questions and Answers

What is the primary objective of Mineral Beneficiation?

  • To increase the metal content in ore
  • To reduce the cost of metallurgical processes
  • To enhance the quality of gangue minerals
  • To eliminate unwanted chemical species or particles of unsuitable size or structure (correct)

What is the primary benefit of carrying out Mineral Beneficiation at the mine site?

  • Reducing the bulk of the ore to be transported (correct)
  • Increasing the reserves of high-grade ore
  • Reducing the cost of smelting
  • Reducing the loss of metal in slag

Why is Mineral Beneficiation becoming increasingly important?

  • Due to the increase in the demand for metal extraction
  • Due to the decrease in the cost of metallurgical processes
  • Due to the depletion of high-grade ore reserves (correct)
  • Due to the increase in the quality of gangue minerals

What is the outcome of switching from Selective mining to Bulk mining?

<p>Increase in the need for Mineral Beneficiation (B)</p> Signup and view all the answers

What is the advantage of Mineral Beneficiation compared to metallurgical processes?

<p>It is less expensive (B)</p> Signup and view all the answers

What is the result of Mineral Beneficiation on lean ores?

<p>They become technically suitable for extraction of metal (A)</p> Signup and view all the answers

What is the primary purpose of Liberation in mineral beneficiation?

<p>To detach or free dissimilar particles from each other (D)</p> Signup and view all the answers

Which of the following is NOT a separation operation in mineral beneficiation?

<p>Pneumatic transport (C)</p> Signup and view all the answers

What is the term for the actual separation of liberated dissimilar particles?

<p>Separation (B)</p> Signup and view all the answers

What is the purpose of supporting operations in mineral beneficiation?

<p>To enable the existence of a plant (C)</p> Signup and view all the answers

What is the term for the process of upgrading the quality of an ore?

<p>Ore upgradation (D)</p> Signup and view all the answers

What is the term for the removal of unwanted particles from the valuable minerals?

<p>Gangue removal (D)</p> Signup and view all the answers

What is meant by the liberation of mineral A in an ore?

<p>The detachment of all grains of mineral A from minerals B and C (C)</p> Signup and view all the answers

What happens when the physical properties of adjacent minerals are sufficiently dissimilar?

<p>Fracture takes place at the boundary (D)</p> Signup and view all the answers

What is the result of comminution in terms of mineral liberation?

<p>The true freeing or detachment of minerals (D)</p> Signup and view all the answers

What is the condition where the reduced ore consists of free particles of valuable minerals and free and/or locked particles of gangue minerals?

<p>Intergranular liberation (B)</p> Signup and view all the answers

Why is liberation of mineral A not necessarily accompanied by the liberation of minerals B and C?

<p>Because mineral A has distinct physical properties (B)</p> Signup and view all the answers

What is the relationship between particle size, liberation size, and grain size in intergranular liberation?

<p>Particle size = liberation size = grain size (C)</p> Signup and view all the answers

Flashcards

Objective of Mineral Beneficiation?

To remove unwanted chemical species or particles of unsuitable size/structure from minerals.

Benefit of On-Site Beneficiation?

Reduces the volume of ore, lowering transportation costs from the mine.

Why is Beneficiation more important?

High-grade ore reserves are being used up faster.

Bulk Mining's Effect?

Increased need to process larger volumes of lower-grade material.

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Advantage vs. Metallurgy?

Beneficiation is generally more energy-efficient and cost-effective.

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Beneficiation's Effect on Lean Ores?

Makes them viable for metal extraction that would otherwise be uneconomical.

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Purpose of Liberation?

Breaking apart composite particles into individual mineral grains.

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Ore Upgradation

Upgrading the quality of an ore by concentrating valuable minerals.

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Gangue Removal

Removing unwanted materials (gangue) from the valuable minerals in the ore.

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Meaning of Mineral A's Liberation?

All grains of mineral A are fully detached from other minerals.

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Result of Dissimilar Minerals?

Minerals separate cleanly along grain boundaries due to differing properties.

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Comminution's role in liberation?

True freeing or detachment of individual minerals occurs.

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Intergranular Liberation

The ore consists of individual particles of valuable and gangue minerals, whether free or locked.

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Why A's liberation differs?

Mineral A has distinct properties causing it to detach differently.

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Sizes in Intergranular Liberation?

Particle size at intergranular liberation equals the size of individual mineral grains.

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