CEMA Bucket Elevator Book

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 / Company / E-Mail
Jeff Gerhart / Martin Sprocket & Gear /

DRAFT HISTORY

Draft Number / Date
1 / September 4, 2012

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 / DENSITY / MATERIAL / RECOMMENDED BUCKET ELEVATOR
LBS/CU. FT. / CODE + / SERIES (STYLE; see notes below)
Where noted as Belt, chain is not recommended, all others chain or belt is acceptable for use.
Alfalfa Meal / 17 / B-46Y / 700, 800
Almonds, broken / 28-30 / C1/2-36Q / 200, 700, 800
Almonds, whole / 28-30 / C1/2-36Q / 700
Alum, fine / 45-50 / B-35 / 200, 700
Alum, lumpy / 50-60 / D-35 / 200, 700
Alumina / 50-65 / B-27M / 700 Belt
Aluminum chips / 7-15 / E-46Y / 700
Aluminum hydrate / 18 / C1/2-35 / 700
Aluminum ore, crushed (3" minus) / 75-85 / D-37 / 100, 200, 700
Aluminum oxide / 70-120 / A-17M / 700
Aluminum silicate / 49 / B-35S / 700
Aluminum sulphate / 54 / C1/2-25 / 700
Ammonium chloride, crystalline / 45-52 / B-25S / 700, 800
Ammonium nitrate / 45 / C1/2-36WUS / 700, 800
Ammonium sulphate, granular / 45-58 / C1/2-26S / 700, 800
Ashes (dry coal 3" minus) / 35-40 / D-46T / 200
Asphalt, crushed (1/2" minus) / 45 / C1/2-35 / 100, 200, 700, 800
Bakelite, powdered (similar products) / 35-45 / B2-5S / 700, 800
Baking powder / 40-55 / A-25 / 700, 800
Barite / 180 / D-36 / 700, 800, 1000, 1100
Barley / 38 / B-15N / 100, 200 Belt
Bauxite, crushed (3" minus) / 75-85 / D-37 / 100, 200, 700, 1000, 1100
Beans, whole castor / 36 / C1/2-15W / 100, 200, 700, 800
Beans, dry navy / 48 / C1/2-15W / 700, 800
Bentonite, crude / 35-40 / D-46X / 100, 200
Bentonite (100 mesh minus) / 50-60 / A2-6XY / 700, 800
Boneblack / 20-25 / A100-25Y / 700
Bones, crushed (1/2" minus) / 34-40 / C1/2-26W / 100, 200, 1400
Bones, granulated or ground (1/8" minus) / 50 / B-26W / 100, 200, 1400
Bone meal / 55-60 / B-36 / 100, 200, 700, 800
Borax, fine / 45-55 / B-26T / 100, 200, 700, 800
Borax, screenings (1/2" minus) / 55-60 / C1/2-36 / 100, 200
Bran / 16-20 / B-35NY / 100, 200
Brewers grain, spent wet / 55-60 / C1/2-45T / 100, 200
Brewers grain, spent dry / 25-30 / C1/2-45T / 100, 200
Buckwheat / 37-42 / B6-25N / 500 Belt
Calcium oxide / 60-65 / B-45X / 100, 200, 700, 800,1000, 1100, 1400
Carbon black, pelletized / 20-25 / B-15Q / 700, 800
Carbon black powder, channel / 4-7 / A-35Y / CF*
Carbon black powder, furnace / 4-7 / A-35Y / CF*
Carborundum (3" minus) / 100 / D-27 / 700
Cast iron borings / 130-200 / C-46 / 100, 200
Cement, portland / 94 / A-26M / 100, 200, 700, 800
Cement, portland aerated / 60-75 / A-16M / 100, 200, 700, 800, 1400
Cement clinker / 75-95 / D-37 / 200, 700, 1000, 1100, 1400
Chalk, lumpy / 75-85 / D-26 / 100, 200, 700, 800
Chalk, pulverized (100 mesh minus) / 65-75 / A-46MXY / 700, 800
Charcoal / 18-25 / D-36Q / 700
Cinders, coal / 40 / D-37T / 200, 700
Cinders, blast furnace / 57 / D-37T / 200, 700
Clay, Brick, Dy Fines / 100-120 / C1/2-36 / 100 Belt
Clover seed / 48 / B-25N / 100, 200
Coal, anthracite sized / 55-60 / C1/2-26 / 100, 200, 700, 800, 1400
Coal, anthracite, river coal & culm / 55-60 / B-35TY / 100, 200, 700, 800, 1400
Coal, bituminous, mined 50 mesh minus / 50-54 / B-45T / 700, 800
Coal, bituminous, mined, slack, 1/2" minus / 43-50 / C1/2-45T / 100, 200, 700, 1000, 1100, 1400
Coal, bituminous, mined, sized, over 1/2" / 45-55 / D-35T / 700, 1000, 1100, 1400
Coal, bituminous, mined, run of mine / 45-55 / D-35T / 100, 200, 700, 1000, 1100, 1400
Coal, bituminous, mined, stripping, uncleaned over 1/2" / 50-60 / D-36T / 100, 200, 700, 1000, 1100, 1400
Cocoa beans / 30-40 / C1/2-25Q / 100, 200, 700
Coffee, green bean / 32 / C1/2-25Q / 100, 200, 700, 800
Coffee, roasted bean / 22-26 / C1/2-15W / 100, 200, 700, 800
Coke, Breeze / 25-35 / C1/2-37 / 200 Belt, 200
Coke, loose / 23-35 / D-47QVT / 200 Belt
Coke, petroleum, calcined / 35-45 / D-36Y / 200 Belt
Coke breeze, !/4" minus / 25-35 / C1/2-37Y / 100, 200 Belt
Copra / 22 / D-25 / 100, 200, 700
Copra Cake, lumpy / 25-30 / D-25W / 100, 200, 700
Copra Cake, groud / 40-45 / B-35W / 100, 200, 700, 800
Copra meal / 40-45 / B-35W / 100, 200, 700, 800
Cork, fine ground / 12-15 / B-45MY / 700, 800
Cork, granulated / 12-15 / C1/2-45T / 700, 800
Corn, cracked / 45-50 / C1/2-25W / 100, 200
Corn, seed / 45 / B-15N / CF *
Corn, shelled / 45 / D-37 / CF *
Corn germs / 21 / B-25W / 100, 200
Corn grits / 40-45 / B-25W / 100, 200
Corn sugar / 31 / B-35 / 100, 200
Cornmeal / 38-40 / B35W / 100, 200
Cottonseed, dry delinted / 35 / C1/2-25W / 100, 200, Belt
Cottonseed, dry with lint / 18-25 / C1/2-35W / 100, 200, Belt
Cottonseed, cake, lumpy / 40-45 / D-25W / 100, 200
Cottonseed hulls / 12 / B-45Y / 700, 800
Cottonseed meal / 35-40 / B-35W / 100, 200
Cottonseed meats / 40 / B-35W / 100, 200
Cullet / 80-120 / D-37Z / 200 Belt
Cracklings, crushed, 3" minus / 40-50 / D45 / 100, 200
Dolomite, lumpy / 90-100 / D26 / 200, 700, 1000, 1100, 1400
Ebonite, crushed 1/2" minus / 65-70 / C1/2-25 / 200, 700, 800
Feldspar, ground !/2" minus / 70-85 / B36 / 100, 200 ,700
Feldspar, powdered 200 mesh / 100 / A46 / 700, 800
Flaxseed / 43-45 / B6-35X / 500 Belt
Flaxseed cake, expeller / 48-50 / D-35T / 200
Flaxseed meal / 25 / B -25W / 100, 200
Flour, wheat / 35-40 / A-45PN / 100, 200, Belt
Flue dust, boiler house, dry / 35-40 / A-17MTY / 700, 800 (select elevator with double the required capacity)
Flourspar, 1/2" screenings / 85-105 / C1/2-46 / 100, 200, 700
Fuller's Earth, dry / 30-35 / B-26 / 100, 200 Belt
Fuller's Earth, oily / 60-65 / B-26 / 100, 200 Belt
Fuller's Earth, burnt, oil filter / 40 / B26 / 100, 200 Belt
Fuller's Earth, raw, oil filter / 35-40 / B-26CF / 100, 200 Belt
Glass batch / 80-100 / D-27Z / 200 Belt
Glue, ground, 1/8" minus / 40 / B-26 / 200
Glue, pearl / 40 / C1/2-25 / 200
Grains, distillery, spent dry / 30 / E-25WY / 100, 200
Granite, 1/2" screenings / 80-90 / C1/2-27 / 1000, 1100, 1400
Grass seed / 10-12 / B-25NY / 700, 800
Gravel, screened / 90-100 / D-36 / 100, 200, 700, 1000, 1100, 1400
Gypsum, calcined / 55-60 / B6-35U / 100, 200, 700, 800
Gypsum, dust, non-aerated / 93 / A-46 / 100, 200, 700, 1000, 1100, 1400
Gypsum, dust, aerated / 60-70 / A-36Y / 100, 200, 700, 1000, 1100, 1400
Gypsum 1/2" screenings / 70-80 / C1/2-36 / 100, 200, 700, 800, 1400
Gypsum, 1 1/2" to 3" lumps / 70-80 / D-26 / 1000, 1100, 1400
Hops, spent, dry / 35 / E-35 / 100, 200
Hops, spent, wet / 50-55 / E-35T / 100, 200
Ice, crushed / 35-45 / D16 / 200, 700
Ilmenite ore / 140-160 / B-27 / 100, 200, 700, 1000, 1100, 1400
Lignite, air dried / 45-55 / D25 CF* / 100, 200, 700
Lime, ground, 1/8" minus / 60-65 / B45X / 100, 200, 700, 800, 1000, 1100, 1400
Lime, hydrated, 1/8" minus / 40 / B35MX / 700, 1000, 1100
Lime, pebble / 53-56 / D35 / 100, 200, 700, 1000, 1100, 1400
Lime, hydrated, pulverized / 32-40 / A35MXY / 100, 200, 700, 1000, 1100, 1400
Limestone, agricultural, 1/8" minus / 68 / B26 / 100, 200, 700, 1000, 1100, 1400
Limestone, crushed / 85-90 / C1/2-26X / 700, 1000, 1100, 1400
Limestone, dust / 80-85 / A46MY / 100, 200, 700, 800, 1000, 1100, 1400
Linseed meal / 25 / B25W / 100, 200
Malt, dry ground, 1/8" minus / 22 / B25NR / 100, 200
Malt, dry, whole / 27-30 / C1/2-25N / 100, 200
Malt, wet or green / 60-65 / C1/2-45 / 100, 200
Malt meal / 36-40 / B25 / 100, 200
Marble, crushed, 1/2" minus / 34-40 / C1/2-26W / 100, 200, 1400
Meat Scrap / 50-55 / E357W / 100, 200
Milk, Malted / 27-30 / A40-45PX / 100
Muriate of potash / 77 / B27 / 100, 200, 700
Mustard seed / 45 / B15N / 100, 200
Oats, rolled / 19 / C1/2-25NY / 100, 200
Oxalic acid crystals / 60 / B35SU / 100, 200 Belt
Peas, dried / 45-50 / C1/2-15NG / CF*
Peanuts, shelled / 35-45 / C1/2-25Q / CF*
Phosphate rock, broken, dry / 75-85 / D-26 / 200, 700, 1000, 1100, 1400
Phosphate rock, pulverized / 60 / B-36 / 100, 700 Belt
Phosphate, triple super / 50-55 / B-45T / 700, 800, 1000, 1100, 1400
Phosphate, acid fertilizef / 60 / B-25T / 700, 800, 1000, 1100, 1400
Potash, (Muriate), dry / 70 / B6-37 / 100, 200, 700
Pumice, ground, 1/8" minus / 40-45 / B-47 / 700
Rice, hulled / 45-49 / B6-15N / 500 Belt
Rice bran / 16-20 / B-35NY / 100, 200
Rice grits / 42-45 / B-35 / 100, 200
Roofing granules / 85-95 / B-27 / 1400
Rubber, ground / 65-70 / C1/2-25 / 200, 700, 800
Salt, dry, fine / 70-80 / D26TUW / 200, 700, 800, 1400
Salt, dry, coarse / 40-55 / C1/2-26TU / 200, 700, 800, 1400
Salt, cake, dry, coarse / 85 / B-36TW / 200, 700, 800, 1400
Salt, cake, dry, pulverized / 60-85 / B-26NT / 200, 700, 800, 1400
Sand, damp bank / 110-130 / B-47 / 100, 200 Belt
Sand, dry bank / 90-110 / B-37 / 100, 200 Belt
Sand, dry silica** / 90-100 / B-27 / 100, 200 Belt
Sand, foundry, prepared / 70-90 / B-47 / 100, 200 Belt
Sand, foundry, shakeout / 90-100 / D-37 / 100, 200 Belt
Sawdust / 10-13 / B-35 / 700 Belt
Shale, crushed / 85-90 / C1/2-36 / 100, 200 Belt
Slag, blast furnace, crushed / 80-90 / A27 / 700, 1000, 1100
Slag, blast furnace, granulated, dry / 60-65 / C1/2-27 / 700, 1000, 1100
Slag, blast furnace, granulated, wet / 90-100 / B-47 / 700, 1000, 1100
Slate, crushed, 1/2" minus / 80-90 / C1/2-26 / 200 Belt, 700, 1000, 1100
Slate, dust / 70-80 / A-36Y / 100, 200 Belt
Soap beads or granules / 15-25 / B-25Q / CF*
Soap flakes / 5-15 / B-35QXY / CF*
Soda ash, light / 20-35 / A-36Y / 700, 800
Soda ash, heavy / 55-65 / B-36 / 100, 200, 700, 800
Sodium Phosphate / 50-60 / A-35 / 100, 700
Soybeans, cracked / 30-40 / C-26NW / 100, 200
Soybean cake, over 1/2" / 40-43 / D-35W / 200
Soybean flakes, raw / 20-26 / C1/2-25Y / 100, 200
Soybeans, flour / 27-30 / A40-35MN / 100 Belt, 200 Belt
Soybean meal, cold / 40 / B-35 / 100, 200
Soybean meal, hot / 40 / B-35T / 100, 200
Soybean, whole / 45-50 / C1/2-26NW / 500 Belt
Steel chips, crushed / 100-150 / D-27WZ / 700
Stone, crushed / 90-100 / D-36Q / 100, 200, 700, 1000, 1100, 1400
Sugar, powdered / 50-60 / B-25PTY / 200, 800
Sugar, granulated / 50-55 / B-25PT / 200, 800
Sugar beet, pulp, dry / 12-15 / CF* / 700, 800
Sugar beet, pulp, wet / 55-65 / B-36TX / 700, 800
Sugar, raw, cane / 55-65 / B-36TX / 100, 200
Tanbark, ground / 55 / CF* / 100, 200
Timothy seed / 36 / B-25NY / 700, 800
Trisodium Phosphate, Granular / 60 / B6-36 / 100, 700
Wheat / 45-48 / C1/2-25N / 500 Belt
Wheat, cracked / 40-45 / B-25N / 100, 200
Wheat germ / 28 / B-25W / 100, 200
Wood chips / 10-30 / E-45WY / 700 Belt
Wood shavings / 8-15 / E-45V / 700 Belt
Zinc dust / 200 / E-45V / 700, 800, 1000, 1100, 1400
Zinc concentrate / 75-80 / B-26 / 700, 800, 1000, 1100, 1400
Zinc ore, crushed / 160 / CF* / 700, 800, 1000, 1100, 1400
Zinc ore, roasted / 110 / C1/2-36 / 700, 800, 1000, 1100, 1400
Zinc oxide, heavy / 30-35 / A-35X / 700, 800, 1000, 1100
Zinc oxide, light / 10-15 / A-35XY / 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

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