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ChE Design > SOLID-SOLID BOSS > Flashcards

SOLID-SOLID BOSS Flashcards

1
Q

Is a process of separating solid material from each other

A

SS Sepa

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2
Q

SS Sepa Depend on physical property of the components like ?

A

size
density
magnetic properties

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3
Q

A physical process

A

SS Sepa

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4
Q

Process used to separate solid mixtures based on particle size

A

Screening

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5
Q

Screening Can be done using ?

A

Single sieve or set of sieves

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6
Q

Is defined as the diameter of the largest sphere that can pass through the mesh opening

A

Aperture/Equivalent Diameter

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7
Q

The number of wires or openings per linear inch counted from center of any wire to a point exactly 1 inch

A

Mesh

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8
Q

For the particle to pass through the sieve, the CSDimension must be? than the mesh opening

A

smaller

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9
Q

Particles must have __ dimensions smaller than the equivalent diameter

A

2

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10
Q

Classic type of sieve

A

Sieve with metallic mesh

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11
Q

To find the equivalence of mesh to nominal aperture, consult to?

A

ASTM E-11 Standard

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12
Q

Metallic perforated plates has either ___, ___, or ____ holes

A

square
round
rectangular

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13
Q

Type of sieve when the holes are 4 mm or above

A

Sieve with perforsted plates

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14
Q

Made of nickel that gone through chemical erosion process

A

Sieve with electroformed plates

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15
Q

Range of apertures is from

A

2mm to 5 micrometer

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16
Q

Principal characteristic of Electroformed plates

A

high precision

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17
Q

Particles that can be separated by gravity

A

larger than 5 micrometers

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18
Q

Particles smaller than 5 micrometers exhibit?

A

Brownian motion

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19
Q

Types according to Density Gradient

A
  1. Rate zonal
  2. Isopycnic or sedimentation equilibrium
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20
Q

Separation is based on apparent / buoyant density in solution

A

Isopycnic or sedimentation equilibrium

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21
Q

Density of surrounding fluid which at which the material neither float nor sediment

A

Buoyant density

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22
Q

Technique used to separate and purify bilogical objects

A

Differential cetri

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23
Q

Involves rotating samples at high speeds achieving high g-force sepa

A

Ultracentrifugation

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24
Q

Ultracentrifugation can generate forces ranging from?

A

100K g to 1M g

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25
Q

Used to purify and characterize a wide range of substances from low-molecular polymers to multimagadalton protein complexes

A

Ultracentrifugation

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26
Q

Are essntial when bulk materials differ significantly in their physical properties

A

Air classifier

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27
Q

Used when particles within bulk material require fast and effcient sepa

A

Air classifier

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29
Q

The working princple in Air classifier are

A

air drag and centri Force (inertia)

30
Q

Becomes dominant as particle size decreases, causing lighter, finer particles to be carried away bu airflow

31
Q

Air classfiers are effective for sepa of dry materials with sizes small than ?

A

100 mesh (149 microns)

32
Q

Types of air classifiers

A

Gravitatonal
Gravitational-inertial
Centrifugal

33
Q

Passing a current of air through a curtain of falling material and separates fine less than 150 mesh to 150 microns

A

Gravitational Air classifiers

34
Q

Application of Gravitational Air classifier

A

Product dedusting
Minerals processing
Potas
Salt

35
Q

Passign a current of falling material and then recirculating the entrained fines back, 300 and 36 microns

A

Gravitational-inertial

36
Q

separates 100 micron to 15 microns

A

Centri Air Classifier

37
Q

versitle process for sepa particles in a mineral/water slurry based on the tendency of air bubbles to attach to specific mineral surfaces

38
Q

S-L sepa that can be used to selectively sepa hydrophobic materials from hydrophilic waste gangue

39
Q

Most common application of flotation

A

Waste and wastewater treatment

40
Q

methods of froth flotation

A

Direct
Reverse

41
Q

Mineral sticks to the air bubbles

42
Q

Gangue sticks to the air bubbles

43
Q

An organic compound that selectively attaches to the surface of the minerals and adds water-repelling nature to the articles

44
Q

Group of compounds that help stabilize the foam

45
Q

Make mineral surface hydrophobic, thus float

46
Q

Deactivates the surface making it sink

A

Depressant

47
Q

Advantages of flotation

A
  1. All types of minerals can be separated
  2. Suface properties can be controlled by flotation reagent
  3. Highly appropriate for sepa of sulphide minerals
48
Q

Is a water-treatment process that clarifies waste water by removing suspended solids, oils, greases, BOD, COD, and metals

A

Dissolved air flotation

49
Q

Process of dissolved air flotation

A
  1. dissolve air in WW under pressure
  2. Relase air at ATM
  3. Relaseds air forms tiny bubbles that adheres to the suspended matters
    and float
50
Q

In dissolved air flotation, the suspended matter can be removed by?

A

skimming device ready to dewater for proper disposal

51
Q

Clarifies WW by injecting gas bubble to the flotation tank

A

Induced gas

52
Q

Device that separate magnetic substances from non-magnetic ones

A

Magnetic separator

53
Q

Is done by passing the mixture through a magnetic field generated by separator

A

Magnetic separator

54
Q

Magnetic susceptibility

A

Paramagnetic
Diamagnetic
Ferromagnetic

55
Q

Weakly attracted to the magnetic field

A

Paramagnetic

56
Q

Materials are repelled

A

Diamagnetic

57
Q

Exhibit strong magenitism, easily separable

A

Feeromagnetic

58
Q

Use rotating magnetic field to generate currents known as eddy currents

A

Eddy current separators

59
Q

Eddy current induce a magnetic field with materials passing through causing a repulsive force that deflects a material away from the separator

A

Eddy current separators

60
Q

designed to be suspended above conveyor belts or chutes
to remove ferrous contaminants from material flow

A

Suspension magnetic separators

61
Q

Are installed directly on converyor systems to remove ferrous contaminants with statioanry magnetic assemby

A

Conveyor belt magnetic separator

62
Q

Features a rotating drum equippend with a magnetic elements, typically made of rare earth magnets

A

Drum magnetic separator

63
Q

Harness the power of electric firlds to separate materials according to their electrical properties and the variation in charging is exploited to acheive sepa

A

Electrostatic sepa

64
Q

General process of Electrostatic sepa

A
  1. Charging
  2. Sepa
  3. Collection
65
Q

Particles are charged by ion bombardment or by contact with a charged surface

66
Q

Charged particles are Introduced into the electric field

67
Q

Based on their respective charges, they have different trajectories

A

Collection

68
Q

Are commonly used for separation of conductve minerals and non-conductive and apply high-Volt DC

A

High tension roll separators (HTRS)

69
Q

Use metal plates cahrged with electric current to separate smaller particles

A

Electrostatic palte and Screen Separators

ChE Design (11 decks)

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