CEMA Bucket Elevator Book
Chapter 4
Selection of Bucket Elevator Style and Design based on Conveyed Material
Chapter Lead: Jeff Gerhart
Contacts and References
Name
Jeff Gerhart
Company
Martin Sprocket & Gear
DRAFT HISTORY
Draft Number
1
Date
September 4, 2012
E-Mail
jgerhart@martinsprocket.com
Draft Chapter 4 – Selection of Bucket Elevator Style and Design Based on Conveyor Material
First Draft
September 4, 2012
Chapter 4 - Selection of Bucket Elevator Style and Design based on Conveyed Material
When determining the design criteria for a bucket elevator, it is very important to review the
characteristics of the material to be conveyed.
The characteristics of the material will have an impact on how the material will evacuate the bucket as it
comes over the head sprocket or pulley. This will dictate if the elevator should use a centrifugal style of
discharge or a continuous (gravity) style of discharge. Some determining factors in this choice include
density of material, propensity of material to aerate during discharge, and particle size of material.
Other characteristics that have impact on elevator design selection is abrasiveness of material,
temperature of material, moisture content of material, and degradability of material. These factors can
influence the style of discharge, the use of belt or chain as the carrier line, the style of bucket, take-up
style, seals, and other design considerations. See chapter 2 for some further details on selection criteria.
Figure 1 below is a sample material table for common materials conveyed in bucket elevators with a
recommended bucket elevator series. Consult your CEMA manufacturer for other design criteria
recommendations.
MATERIALS TABLE Figure 1
MATERIAL TO BE CONVEYED
Alfalfa Meal
Almonds, broken
Almonds, whole
Alum, fine
Alum, lumpy
Alumina
Aluminum chips
Aluminum hydrate
Aluminum ore, crushed (3" minus)
Aluminum oxide
Aluminum silicate
Aluminum sulphate
Ammonium chloride, crystalline
Ammonium nitrate
Ammonium sulphate, granular
DENSITY
MATERIAL
LBS/CU.
FT.
CODE +
17
28-30
28-30
45-50
50-60
50-65
7-15
18
75-85
70-120
49
54
45-52
45
45-58
Page 2 of 7
B-46Y
C1/2-36Q
C1/2-36Q
B-35
D-35
B-27M
E-46Y
C1/2-35
D-37
A-17M
B-35S
C1/2-25
B-25S
C1/236WUS
C1/2-26S
RECOMMENDED BUCKET ELEVATOR
SERIES (STYLE; see notes below)
Where noted as Belt, chain is not
recommended, all others chain or belt
is acceptable for use.
700, 800
200, 700, 800
700
200, 700
200, 700
700 Belt
700
700
100, 200, 700
700
700
700
700, 800
700, 800
700, 800
Draft Chapter 4 – Selection of Bucket Elevator Style and Design Based on Conveyor Material
First Draft
September 4, 2012
Ashes (dry coal 3" minus)
Asphalt, crushed (1/2" minus)
Bakelite, powdered (similar products)
Baking powder
Barite
Barley
Bauxite, crushed (3" minus)
Beans, whole castor
Beans, dry navy
Bentonite, crude
Bentonite (100 mesh minus)
Boneblack
Bones, crushed (1/2" minus)
Bones, granulated or ground (1/8" minus)
Bone meal
Borax, fine
Borax, screenings (1/2" minus)
Bran
Brewers grain, spent wet
Brewers grain, spent dry
Buckwheat
Calcium oxide
Carbon black, pelletized
Carbon black powder, channel
Carbon black powder, furnace
Carborundum (3" minus)
Cast iron borings
Cement, portland
Cement, portland aerated
Cement clinker
Chalk, lumpy
Chalk, pulverized (100 mesh minus)
Charcoal
Cinders, coal
Cinders, blast furnace
Clay, Brick, Dy Fines
Clover seed
Coal, anthracite sized
Coal, anthracite, river coal & culm
Coal, bituminous, mined 50 mesh minus
Coal, bituminous, mined, slack, 1/2" minus
Coal, bituminous, mined, sized, over 1/2"
Coal, bituminous, mined, run of mine
Coal, bituminous, mined, stripping,
uncleaned over 1/2"
Cocoa beans
35-40
45
35-45
40-55
180
38
75-85
36
48
35-40
50-60
20-25
34-40
50
55-60
45-55
55-60
16-20
55-60
25-30
37-42
60-65
20-25
4-7
4-7
100
130-200
94
60-75
75-95
75-85
65-75
18-25
40
57
100-120
48
55-60
55-60
50-54
43-50
45-55
45-55
D-46T
C1/2-35
B2-5S
A-25
D-36
B-15N
D-37
C1/2-15W
C1/2-15W
D-46X
A2-6XY
A100-25Y
C1/2-26W
B-26W
B-36
B-26T
C1/2-36
B-35NY
C1/2-45T
C1/2-45T
B6-25N
B-45X
B-15Q
A-35Y
A-35Y
D-27
C-46
A-26M
A-16M
D-37
D-26
A-46MXY
D-36Q
D-37T
D-37T
C1/2-36
B-25N
C1/2-26
B-35TY
B-45T
C1/2-45T
D-35T
D-35T
50-60
D-36T
30-40
C1/2-25Q
Page 3 of 7
200
100, 200, 700, 800
700, 800
700, 800
700, 800, 1000, 1100
100, 200 Belt
100, 200, 700, 1000, 1100
100, 200, 700, 800
700, 800
100, 200
700, 800
700
100, 200, 1400
100, 200, 1400
100, 200, 700, 800
100, 200, 700, 800
100, 200
100, 200
100, 200
100, 200
500 Belt
100, 200, 700, 800,1000, 1100, 1400
700, 800
CF*
CF*
700
100, 200
100, 200, 700, 800
100, 200, 700, 800, 1400
200, 700, 1000, 1100, 1400
100, 200, 700, 800
700, 800
700
200, 700
200, 700
100 Belt
100, 200
100, 200, 700, 800, 1400
100, 200, 700, 800, 1400
700, 800
100, 200, 700, 1000, 1100, 1400
700, 1000, 1100, 1400
100, 200, 700, 1000, 1100, 1400
100, 200, 700, 1000, 1100, 1400
100, 200, 700
Draft Chapter 4 – Selection of Bucket Elevator Style and Design Based on Conveyor Material
First Draft
September 4, 2012
Coffee, green bean
Coffee, roasted bean
Coke, Breeze
Coke, loose
Coke, petroleum, calcined
Coke breeze, !/4" minus
Copra
Copra Cake, lumpy
Copra Cake, groud
Copra meal
Cork, fine ground
Cork, granulated
Corn, cracked
Corn, seed
Corn, shelled
Corn germs
Corn grits
Corn sugar
Cornmeal
Cottonseed, dry delinted
Cottonseed, dry with lint
Cottonseed, cake, lumpy
Cottonseed hulls
Cottonseed meal
Cottonseed meats
Cullet
Cracklings, crushed, 3" minus
Dolomite, lumpy
Ebonite, crushed 1/2" minus
Feldspar, ground !/2" minus
Feldspar, powdered 200 mesh
Flaxseed
Flaxseed cake, expeller
Flaxseed meal
Flour, wheat
32
22-26
25-35
23-35
35-45
25-35
22
25-30
40-45
40-45
12-15
12-15
45-50
45
45
21
40-45
31
38-40
35
18-25
40-45
12
35-40
40
80-120
40-50
90-100
65-70
70-85
100
43-45
48-50
25
35-40
C1/2-25Q
C1/2-15W
C1/2-37
D-47QVT
D-36Y
C1/2-37Y
D-25
D-25W
B-35W
B-35W
B-45MY
C1/2-45T
C1/2-25W
B-15N
D-37
B-25W
B-25W
B-35
B35W
C1/2-25W
C1/2-35W
D-25W
B-45Y
B-35W
B-35W
D-37Z
D45
D26
C1/2-25
B36
A46
B6-35X
D-35T
B -25W
A-45PN
Flue dust, boiler house, dry
35-40
A-17MTY
Flourspar, 1/2" screenings
Fuller's Earth, dry
Fuller's Earth, oily
Fuller's Earth, burnt, oil filter
Fuller's Earth, raw, oil filter
Glass batch
Glue, ground, 1/8" minus
Glue, pearl
Grains, distillery, spent dry
85-105
30-35
60-65
40
35-40
80-100
40
40
30
C1/2-46
B-26
B-26
B26
B-26CF
D-27Z
B-26
C1/2-25
E-25WY
Page 4 of 7
100, 200, 700, 800
100, 200, 700, 800
200 Belt, 200
200 Belt
200 Belt
100, 200 Belt
100, 200, 700
100, 200, 700
100, 200, 700, 800
100, 200, 700, 800
700, 800
700, 800
100, 200
CF *
CF *
100, 200
100, 200
100, 200
100, 200
100, 200, Belt
100, 200, Belt
100, 200
700, 800
100, 200
100, 200
200 Belt
100, 200
200, 700, 1000, 1100, 1400
200, 700, 800
100, 200 ,700
700, 800
500 Belt
200
100, 200
100, 200, Belt
700, 800 (select elevator with double
the required capacity)
100, 200, 700
100, 200 Belt
100, 200 Belt
100, 200 Belt
100, 200 Belt
200 Belt
200
200
100, 200
Draft Chapter 4 – Selection of Bucket Elevator Style and Design Based on Conveyor Material
First Draft
September 4, 2012
Granite, 1/2" screenings
Grass seed
Gravel, screened
Gypsum, calcined
Gypsum, dust, non-aerated
Gypsum, dust, aerated
Gypsum 1/2" screenings
Gypsum, 1 1/2" to 3" lumps
Hops, spent, dry
Hops, spent, wet
Ice, crushed
Ilmenite ore
Lignite, air dried
Lime, ground, 1/8" minus
Lime, hydrated, 1/8" minus
Lime, pebble
Lime, hydrated, pulverized
Limestone, agricultural, 1/8" minus
Limestone, crushed
Limestone, dust
Linseed meal
Malt, dry ground, 1/8" minus
Malt, dry, whole
Malt, wet or green
Malt meal
Marble, crushed, 1/2" minus
Meat Scrap
Milk, Malted
Muriate of potash
Mustard seed
Oats, rolled
Oxalic acid crystals
Peas, dried
Peanuts, shelled
Phosphate rock, broken, dry
Phosphate rock, pulverized
Phosphate, triple super
Phosphate, acid fertilizef
Potash, (Muriate), dry
Pumice, ground, 1/8" minus
Rice, hulled
Rice bran
Rice grits
Roofing granules
Rubber, ground
Salt, dry, fine
80-90
10-12
90-100
55-60
93
60-70
70-80
70-80
35
50-55
35-45
140-160
45-55
60-65
40
53-56
32-40
68
85-90
80-85
25
22
27-30
60-65
36-40
34-40
50-55
27-30
77
45
19
60
45-50
35-45
75-85
60
50-55
60
70
40-45
45-49
16-20
42-45
85-95
65-70
70-80
Page 5 of 7
C1/2-27
B-25NY
D-36
B6-35U
A-46
A-36Y
C1/2-36
D-26
E-35
E-35T
D16
B-27
D25 CF*
B45X
B35MX
D35
A35MXY
B26
C1/2-26X
A46MY
B25W
B25NR
C1/2-25N
C1/2-45
B25
C1/2-26W
E357W
A40-45PX
B27
B15N
C1/2-25NY
B35SU
C1/2-15NG
C1/2-25Q
D-26
B-36
B-45T
B-25T
B6-37
B-47
B6-15N
B-35NY
B-35
B-27
C1/2-25
D26TUW
1000, 1100, 1400
700, 800
100, 200, 700, 1000, 1100, 1400
100, 200, 700, 800
100, 200, 700, 1000, 1100, 1400
100, 200, 700, 1000, 1100, 1400
100, 200, 700, 800, 1400
1000, 1100, 1400
100, 200
100, 200
200, 700
100, 200, 700, 1000, 1100, 1400
100, 200, 700
100, 200, 700, 800, 1000, 1100, 1400
700, 1000, 1100
100, 200, 700, 1000, 1100, 1400
100, 200, 700, 1000, 1100, 1400
100, 200, 700, 1000, 1100, 1400
700, 1000, 1100, 1400
100, 200, 700, 800, 1000, 1100, 1400
100, 200
100, 200
100, 200
100, 200
100, 200
100, 200, 1400
100, 200
100
100, 200, 700
100, 200
100, 200
100, 200 Belt
CF*
CF*
200, 700, 1000, 1100, 1400
100, 700 Belt
700, 800, 1000, 1100, 1400
700, 800, 1000, 1100, 1400
100, 200, 700
700
500 Belt
100, 200
100, 200
1400
200, 700, 800
200, 700, 800, 1400
Draft Chapter 4 – Selection of Bucket Elevator Style and Design Based on Conveyor Material
First Draft
September 4, 2012
Salt, dry, coarse
Salt, cake, dry, coarse
Salt, cake, dry, pulverized
Sand, damp bank
Sand, dry bank
Sand, dry silica**
Sand, foundry, prepared
Sand, foundry, shakeout
Sawdust
Shale, crushed
Slag, blast furnace, crushed
Slag, blast furnace, granulated, dry
Slag, blast furnace, granulated, wet
Slate, crushed, 1/2" minus
Slate, dust
Soap beads or granules
Soap flakes
Soda ash, light
Soda ash, heavy
Sodium Phosphate
Soybeans, cracked
Soybean cake, over 1/2"
Soybean flakes, raw
Soybeans, flour
Soybean meal, cold
Soybean meal, hot
Soybean, whole
Steel chips, crushed
Stone, crushed
Sugar, powdered
Sugar, granulated
Sugar beet, pulp, dry
Sugar beet, pulp, wet
Sugar, raw, cane
Tanbark, ground
Timothy seed
Trisodium Phosphate, Granular
Wheat
Wheat, cracked
Wheat germ
Wood chips
Wood shavings
Zinc dust
Zinc concentrate
Zinc ore, crushed
40-55
85
60-85
110-130
90-110
90-100
70-90
90-100
10-13
85-90
80-90
60-65
90-100
80-90
70-80
15-25
5-15
20-35
55-65
50-60
30-40
40-43
20-26
27-30
40
40
45-50
100-150
90-100
50-60
50-55
12-15
55-65
55-65
55
36
60
45-48
40-45
28
10-30
8-15
200
75-80
160
Page 6 of 7
C1/2-26TU
B-36TW
B-26NT
B-47
B-37
B-27
B-47
D-37
B-35
C1/2-36
A27
C1/2-27
B-47
C1/2-26
A-36Y
B-25Q
B-35QXY
A-36Y
B-36
A-35
C-26NW
D-35W
C1/2-25Y
A40-35MN
B-35
B-35T
C1/226NW
D-27WZ
D-36Q
B-25PTY
B-25PT
CF*
B-36TX
B-36TX
CF*
B-25NY
B6-36
C1/2-25N
B-25N
B-25W
E-45WY
E-45V
E-45V
B-26
CF*
200, 700, 800, 1400
200, 700, 800, 1400
200, 700, 800, 1400
100, 200 Belt
100, 200 Belt
100, 200 Belt
100, 200 Belt
100, 200 Belt
700 Belt
100, 200 Belt
700, 1000, 1100
700, 1000, 1100
700, 1000, 1100
200 Belt, 700, 1000, 1100
100, 200 Belt
CF*
CF*
700, 800
100, 200, 700, 800
100, 700
100, 200
200
100, 200
100 Belt, 200 Belt
100, 200
100, 200
500 Belt
700
100, 200, 700, 1000, 1100, 1400
200, 800
200, 800
700, 800
700, 800
100, 200
100, 200
700, 800
100, 700
500 Belt
100, 200
100, 200
700 Belt
700 Belt
700, 800, 1000, 1100, 1400
700, 800, 1000, 1100, 1400
700, 800, 1000, 1100, 1400
Draft Chapter 4 – Selection of Bucket Elevator Style and Design Based on Conveyor Material
First Draft
September 4, 2012
Zinc ore, roasted
Zinc oxide, heavy
Zinc oxide, light
110
30-35
10-15
C1/2-36
A-35X
A-35XY
700, 800, 1000, 1100, 1400
700, 800, 1000, 1100
700, 800
* CF = Consult Factory
** If sand is hot, use of high temperature belt & insulating pads between buckets and belt is recommended.
+ Consult CEMA 350 for material (code) classification descriptions
Elevator types :
#100 & #200 are centrifugal discharge units, belt or chain types available, #200 has head take-up
#700 & #800 are continuous discharge units, belt or chain types available, #800 has head take-up
#1000 & #1100 are Super Capacity continuous discharge units, chain types only available
#1400 are Mill Duty centrifugal discharge units, belt or chain types available
Page 7 of 7