Mineral Processing at Technische Hochschule Georg Agricola | Flashcards & Summaries

Lernmaterialien für Mineral Processing an der Technische Hochschule Georg Agricola

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Definitions of Sizing, screening and classification
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- Sizing is the general term for separation of particles according to their size - Screening is the separation of coarse particles - Classification is the separation of fine particles
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Characteristics of Roll Crushers
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- tertiary crusher - suitable for soft materials - high capacity - high size reduction ratio - unable to produce fine material
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Characteristics of Gyratory Crushers
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- Primary or Secondary Crusher - more energy consumption than Jaw Crushers - produce more new surface area than jaw crushers
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Characteristics of Ball Mills
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- Steel or iron grinding media - generally in shape of spheres - ores can be ground wet or dry - operates at 75% of critical speed - lined drums of cylindrical or conical form
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Characteristics of Jaw Crushers
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- Coarse or primary crusher - can handle large feed sizes - work good with clayey or spongy rocks
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Characteristics of Cone Crusher
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- secondary or tertiary crusher - suitable for mid hard and hard ores - high capacity - high size reduction ratio
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Characteristics of Impact Crusher
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- Large size reduction - high power consumption - requires feeder
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Characteristics of activators
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-activators are special compund who make adsorption of frothers possible which naturally won't occur
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Characteristics of frothers
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-Frothers stabilizes the foam layer, so that it can be removed before the bubbles burst -Although foam stability has to be optimized, because of downstream process (fluid has to be pumped etc.)
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Definition Collectors
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-are able to adsorb selectively at particle surface -collectors increase contact angle/hydrophobicity so that gas bubbles can adsorb -can either adsorb chemically (chemisorption) or physically (physical sorption)
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3 Dimensions of Flotation System
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-Equipment Components -Chemistry Components -Operation Components
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Factors for estimation of Floatation Cell Set Up
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-Optimum grind size of the ore -reagent(s) addition -optimum pulp density -flotation time -variability of ore -corrosive and wear properties -circuit design
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  • 2861 Karteikarten
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Beispielhafte Karteikarten für deinen Mineral Processing Kurs an der Technische Hochschule Georg Agricola - von Kommilitonen auf StudySmarter erstellt!

Q:
Definitions of Sizing, screening and classification
A:
- Sizing is the general term for separation of particles according to their size - Screening is the separation of coarse particles - Classification is the separation of fine particles
Q:
Characteristics of Roll Crushers
A:
- tertiary crusher - suitable for soft materials - high capacity - high size reduction ratio - unable to produce fine material
Q:
Characteristics of Gyratory Crushers
A:
- Primary or Secondary Crusher - more energy consumption than Jaw Crushers - produce more new surface area than jaw crushers
Q:
Characteristics of Ball Mills
A:
- Steel or iron grinding media - generally in shape of spheres - ores can be ground wet or dry - operates at 75% of critical speed - lined drums of cylindrical or conical form
Q:
Characteristics of Jaw Crushers
A:
- Coarse or primary crusher - can handle large feed sizes - work good with clayey or spongy rocks
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Q:
Characteristics of Cone Crusher
A:
- secondary or tertiary crusher - suitable for mid hard and hard ores - high capacity - high size reduction ratio
Q:
Characteristics of Impact Crusher
A:
- Large size reduction - high power consumption - requires feeder
Q:
Characteristics of activators
A:
-activators are special compund who make adsorption of frothers possible which naturally won't occur
Q:
Characteristics of frothers
A:
-Frothers stabilizes the foam layer, so that it can be removed before the bubbles burst -Although foam stability has to be optimized, because of downstream process (fluid has to be pumped etc.)
Q:
Definition Collectors
A:
-are able to adsorb selectively at particle surface -collectors increase contact angle/hydrophobicity so that gas bubbles can adsorb -can either adsorb chemically (chemisorption) or physically (physical sorption)
Q:
3 Dimensions of Flotation System
A:
-Equipment Components -Chemistry Components -Operation Components
Q:
Factors for estimation of Floatation Cell Set Up
A:
-Optimum grind size of the ore -reagent(s) addition -optimum pulp density -flotation time -variability of ore -corrosive and wear properties -circuit design
Mineral Processing

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