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A comparative study on the comminution behavior of diorite rocks
Gaesenngwe Gaesenngwe1, Tirivaviri Mamvura1, Gwiranai Danha1
1Department of Chemicals, Materials & Metallurgical Engineering, Botswana International University of Science and Technology, Private Bag 6, Palapye 10071, Botswana.
Heliyon
|November 26, 2021
Summary
Investigating Botswana diorite rocks for construction revealed that mineral composition significantly impacts comminution energy. Central region diorite requires more energy due to higher silicate content, affecting production costs.
Area of Science:
- Geology and Materials Science
- Mining Engineering
- Construction Materials Science
Background:
- Diorite rocks are abundant in Botswana and considered a cost-effective construction material.
- Understanding diorite's comminution behavior is crucial for sustainable infrastructure development.
- Variations in rock properties influence processing efficiency and application suitability.
Purpose of the Study:
- To investigate the comminution behavior of diorite rocks from two Botswana quarry locations.
- To compare the influence of mineral composition and structural similarities on rock breakage.
- To determine and compare the energy requirements for processing diorite into construction aggregate.
Main Methods:
- Collected diorite samples from Central and North-Eastern Botswana quarry sites.
- Analyzed structural similarities and mineral composition of the rock samples.
- Conducted comminution tests using a laboratory jaw crusher and planetary ball mill.
- Determined particle size distribution (PSD) and calculated theoretical power requirements.
Main Results:
- Central region diorite, with amorphous constituents and 12.4% silicate/quartz, required 41.58 KWh/t for comminution.
- North-Eastern diorite, with high crystalline phases and 6.94% silicate/quartz, required 38.33 KWh/t.
- Inherent rock properties significantly influence energy consumption and production costs.
Conclusions:
- Diorite's mineralogical makeup is a key factor in its comminution efficiency.
- Variations in silicate/quartz content directly correlate with energy demands for processing.
- Understanding these properties is vital for optimizing quarry operations and material application in Botswana.
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