Podcast
Questions and Answers
What is aluminum made from?
What is aluminum made from?
Aluminum is made from the aluminum-bearing minerals in bauxite.
What percentage of the Earth's crust is made up of aluminum?
What percentage of the Earth's crust is made up of aluminum?
- 8.1% (correct)
- 2.8%
- 5.1%
- 3.6%
Which of the following is NOT a type of ore mentioned?
Which of the following is NOT a type of ore mentioned?
- Oxide ores
- Sulfide ores
- Carbonate ores
- Silicate ores (correct)
Ore dressing is meant to increase the concentration of valuable minerals.
Ore dressing is meant to increase the concentration of valuable minerals.
What is the process of reducing the size of the ore by crushing and grinding called?
What is the process of reducing the size of the ore by crushing and grinding called?
Match the following types of ores with their chemical formulas:
Match the following types of ores with their chemical formulas:
What is aluminum made from?
What is aluminum made from?
Which of the following are sources of minerals found in Earth's crust? (Select all that apply)
Which of the following are sources of minerals found in Earth's crust? (Select all that apply)
What are the three groups of minerals contained in an ore?
What are the three groups of minerals contained in an ore?
Hydrometallurgy is one of the extraction methods used in extractive metallurgy.
Hydrometallurgy is one of the extraction methods used in extractive metallurgy.
What is ore dressing?
What is ore dressing?
The ______ reduces the size of the ore by crushing, grinding, cutting, and vibrating.
The ______ reduces the size of the ore by crushing, grinding, cutting, and vibrating.
Match the following types of ores with their examples:
Match the following types of ores with their examples:
Study Notes
Ore Dressing: Comminution
- Comminution is the process of reducing the size of the ore by crushing, grinding, cutting, and vibrating.
- The goal of comminution is to release or expose all valuable minerals.
- This is usually followed by a screening process.
- Jaw crushers and roll crushers are examples of comminution equipment.
Extractive Metallurgy
- Deals with metal extraction and refining from naturally occurring ores or minerals
- Earth's crust contains significant amounts of various metals including aluminum, iron, calcium, sodium, potassium, magnesium, titanium, and manganese.
- Oceans contain dissolved metals like sodium, magnesium, calcium, and potassium, as well as manganese nodules on the seabed.
- Scrap recycling is a significant source of metals at the end of their life cycle
Mineral Ores
- An ore is a mineral deposit economically viable for metal extraction
- Ores contain three groups of minerals:
- Valuable minerals of the target metal
- Compounds of associated metals with secondary value
- Gangue minerals with minimal value
- Common ore types:
- Oxide ores: examples are Fe2O3 and Fe3O4
- Sulfide ores: examples include CuFeS2, (Zn,Fe)S, PbS, and FeS2
- Carbonate ores: examples are CaMg(CO3)2, MgCO3, and Cu2CO3(OH)2
- Halide ores: examples are rock salts of sodium and magnesium chloride found in seawater
Ore Dressing
- Pre-treatment of ores before chemical processing
- Enriches valuable minerals and prepares material for subsequent operations
- Ore dressing processes:
- Comminution
- Sorting
- Agglomeration
Ore Dressing: Comminution
- Size reduction of ores using crushing, grinding, cutting, and vibrating
- Aims to release or expose valuable minerals
- Usually followed by a screening process
- Examples of crushers/grinders:
- Jaw crusher
- Roll crusher
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Description
This quiz covers the essential aspects of the comminution process in ore dressing. Participants will learn about techniques like crushing and grinding, as well as the equipment used such as jaw and roll crushers. Understanding these fundamental steps is crucial for effective mineral extraction.
