What are the conditions for an object to float?

1. Average density of the object must be less than that of the fluid. 2. Volume of the submerged object must be large enough to displace a significant amount of fluid. 3. Upthrust must be greater than the total weight of the object.

What is true flotation?

A process where minerals are selectively attached to froth.

What is the role of collectors in flotation?

Collectors are surface-active agents that render mineral surfaces hydrophobic, enhancing their attachment to air bubbles.

What is the purpose of frothers in flotation?

Frothers stabilize air bubbles for effective particle-bubble attachment and help carry over particle-laden bubbles to the froth.

What is the significance of particle size in flotation?

Particles in the size range of 20-60 microns have the highest flotation rate; larger particles are harder to levitate.

What is the function of modifiers in flotation?

Modifiers include activators, pH regulators, depressants, dispersants, and flocculants that enhance selectivity and control slimes.

What is the main application of flotation in the mining industry?

To separate valuable minerals from surrounding rock and ore by creating a froth layer.

How does flotation apply to paper recycling?

In paper recycling, flotation is used to create a froth layer where ink particles adhere to bubbles and rise to the surface.

What is the role of dissolved-air flotation units?

They saturate the process stream with air and generate air bubbles by releasing pressure, facilitating particle-bubble contact.

What are mechanical cells in flotation?

Flotation cells characterized by a cubic or cylindrical shape, equipped with an impeller for mixing and air introduction.

What is the function of flotation columns?

Flotation columns use gas-sparging systems to generate air bubbles without mechanical agitation, separating hydrophobic and hydrophilic particles.

What are the advantages of flotation?

1. Wide application range and strong adaptability. 2. High sorting efficiency for low-grade and fine minerals. 3. Comprehensive recovery of mineral resources.

What are the disadvantages of flotation?

1. Environmental pollution from chemical use. 2. Requires finer grinding particle size. 3. High investment costs and process complexity.

What is the general formula for buoyancy?

F_B = m_f * V = ρ_f * V_f * g, where m_f is mass of fluid displaced, ρ_f is fluid density, V_f is volume of fluid displaced, and g is acceleration due to gravity.

What is the effect of upthrust on submerged objects?

Upthrust makes a submerged body appear lighter than it actually is, increasing with the volume submerged and fluid density.

What is the significance of the center of buoyancy?

The center of buoyancy is the point where the upthrust force acts on a submerged body, affecting its stability.

What is the role of air bubbles in flotation?

Air bubbles attach to hydrophobic particles, allowing them to rise to the surface as froth, separating them from unwanted materials.

What is the process of conditioning in flotation?

Conditioning involves feeding a slurry of particles to a unit where flotation reagents are added to prepare for separation.

What is the purpose of the flotation plant operation?

To grind ores to a point of complete liberation and separate valuable minerals from gangue through a series of flotation cells.

What is the relationship between particle characteristics and flotation?

Particle size, shape, and chemical composition significantly affect the flotation process and efficiency.

What are the types of flotation reagents?

Collectors, frothers, and modifiers are the main types of flotation reagents used to enhance the flotation process.

What is the role of surfactants in ion flotation?

Surfactants with opposite charges are added to form a surfactant complex, allowing for the collection of ions through gas bubbles.

What is the significance of the flotation equipment design?

The design of flotation equipment, such as mechanical cells and flotation columns, affects the efficiency and effectiveness of the flotation process.

What is the impact of chemical variables on flotation?

The type and amount of flotation reagents added can significantly influence the separation efficiency and selectivity of the flotation process.

What is the importance of slurry feed rate in flotation?

The slurry feed rate affects the concentration and recovery of minerals during the flotation process.

What is the role of air in flotation?

Air is introduced into the flotation process to create bubbles that facilitate the attachment of hydrophobic particles.

What is the effect of fluid density on upthrust?

Upthrust increases as fluid density increases, affecting the buoyancy of submerged objects.

What is the relationship between flotation and thermodynamics of wetting?

The attachment of particles to air bubbles involves thermodynamic principles that govern the interactions between solid, liquid, and gas interfaces.

What is the significance of the Young's Equation in flotation?

Young's Equation describes the balance of forces at the air-water-solid interface, influencing particle attachment during flotation.

What is the role of air-sparging in flotation columns?

Air-sparging generates bubbles that facilitate the separation of hydrophobic particles from hydrophilic ones in flotation columns.

What is the impact of flotation on food processing?

Flotation is used in food processing for clarification of juices and wines by separating suspended solids and impurities.

What is the significance of the froth layer in flotation?

The froth layer collects hydrophobic particles that have attached to air bubbles, allowing for their removal and separation from the slurry.

What is the role of pH regulators in flotation?

pH regulators adjust the acidity or alkalinity of the flotation pulp, affecting the surface properties of minerals and their interaction with reagents.

What is the purpose of depressants in flotation?

Depressants prevent unwanted minerals from floating, enhancing the selectivity of the flotation process.

What is the function of dispersants in flotation?

Dispersants control slimes that interfere with selectivity and reagent consumption during the flotation process.

What is the significance of the flotation process in environmental applications?

Flotation is used in environmental applications such as wastewater treatment and recycling, helping to separate contaminants from valuable materials.

What is the role of flotation in the recovery of mineral resources?

Flotation enables the efficient separation and concentration of valuable minerals from ores, contributing to resource recovery.

What is the impact of flotation on the mining industry?

Flotation is crucial in the mining industry for the extraction of valuable minerals, enhancing the economic viability of mining operations.

What is the relationship between flotation and particle-bubble attachment?

Successful flotation relies on the effective attachment of particles to air bubbles, which is influenced by particle characteristics and flotation reagents.

What is the significance of the froth flotation process in recycling?

Froth flotation in recycling helps to recover valuable materials from waste streams, improving resource efficiency and reducing environmental impact.

What is the role of flotation in the clarification of liquid products?

Flotation is employed to clarify liquid products by removing suspended solids and impurities, enhancing product quality.

What is the importance of flotation in the food industry?

Flotation is used in the food industry for the clarification of juices and wines, improving the quality and appearance of the final products.

What is the significance of the flotation process in the context of environmental sustainability?

Flotation contributes to environmental sustainability by enabling the recovery of valuable resources and reducing waste in various industries.

What is the role of flotation in the separation of hydrophobic and hydrophilic materials?

Flotation effectively separates hydrophobic materials that attach to air bubbles from hydrophilic materials that sink, enhancing material recovery.

Particle Technology: Flotation Flashcards

Student preview

104 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is flotation in mineral processing?

Back

A method of mineral processing where minerals are separated by creating froth on which they float, effectively separating them from other materials.

2.

FLASHCARD QUESTION

Front

What is the driving force behind flotation?

Back

The difference in surface chemical properties and wetting ability of the ore.

3.

FLASHCARD QUESTION

Front

What are the two main types of flotation?

Back

Ore flotation and microflotation.

4.

FLASHCARD QUESTION

Front

What is positive buoyancy?

Back

When the weight of the water displaced is greater than the weight of the object, causing it to float.

5.

FLASHCARD QUESTION

Front

What is negative buoyancy?

Back

When the weight of the object is greater than the weight of the liquid it displaces, causing it to sink.

6.

FLASHCARD QUESTION

Front

What is neutral buoyancy?

Back

When the weight of the object is equal to the weight of the liquid it displaces, allowing it to hover.

7.

FLASHCARD QUESTION

Front

What is Archimedes' Principle?

Back

An object in fluid is buoyed up by a force equal to the weight of the liquid displaced.

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

51 questions

DAY 12

Flashcard

•

University

104 questions

Flashcards về Dữ liệu Tổ chức

Flashcard

•

KG - University

100 questions

theme 1 Flashcards

Flashcard

•

12th Grade

103 questions

Understanding the Housekeeping Department

Flashcard

•

12th Grade

121 questions

Greek Vocabulary Flashcards

Flashcard

•

KG

72 questions

tanh

Flashcard

•

10th Grade

130 questions

Vocabulary and Structures for English Proficiency

Flashcard

•

12th Grade

56 questions

9 ngày

Flashcard

•

12th Grade

Popular Resources on Wayground

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

$fractions$

22 questions

fractions

Quiz

•

3rd Grade

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

15 questions

Equivalent Fractions

Quiz

•

4th Grade

20 questions

Figurative Language Review

Quiz

•

6th Grade

Discover more resources for Science

11 questions

Recitation Week 2

Quiz

•

University