Screw Conveyor, Bucket Elevator and Linear Screen Guide

Screw conveyors are suitable for transporting various powdered, granular, and small block materials, such as coal, sand and gravel, lump coal, sand, cement, and grains. They are not suitable for transporting easily perishable, highly viscous, or easily caked materials. Bucket elevators are of the straight-through type, suitable for vertically transporting powdered and granular bulk materials. They can be adapted to different operating conditions and are widely used in many industrial sectors. Linear vibrating screens, compared with shaking table screens, electromagnetic vibration screens, and rotary vibrating screens, have the characteristics of high screening accuracy, simple structure, convenient maintenance, low energy consumption, low noise, good sealing, reduced dust pollution, and long screen life. They have extensive applications in the screening and grading of granular and powdered materials in chemical, food, metallurgical, mining, construction, grain, abrasive, fertilizer, and coal industries. Why choose these three types of equipment? Because they can effectively solve efficiency, accuracy, and environmental issues in the transportation and screening of bulk materials. Screw conveyors and bucket elevators can realize horizontal and vertical material transport, while linear vibrating screens can achieve high-precision screening and grading. Together, the three can form a complete bulk material handling production line. These three types of equipment are primarily used for transporting and screening granular and powdered materials in industries such as chemical, food, metallurgy, mining, construction, grain, abrasives, fertilizers, and coal. The users who need these three types of equipment include chemical plants, food factories, metallurgical plants, mining enterprises, construction material factories, grain processing plants, fertilizer plants, coal enterprises’ equipment procurement and operation & maintenance departments, as well as EPC contractors for bulk material handling production lines, equipment distributors and stockists, and overseas industrial project purchasers. Under what circumstances should these three types of equipment be chosen or replaced? When horizontal or inclined transportation of powdered, granular, or small block materials is required, screw conveyors are preferred; when vertical upward transport of bulk materials is required, bucket elevators are preferred; when high-precision screening and grading of granular and powdered materials is required, linear vibrating screens are preferred. Replacement is needed when old equipment has low transport efficiency, poor screening accuracy, serious dust pollution, or a high failure rate; when a new bulk material handling production line requires transport and screening equipment, these three types of equipment should be given priority. How to choose a screw conveyor? Step 1: Confirm the material properties. Screw conveyors are suitable for conveying powdered, granular, and small block materials, but are not suitable for highly sticky or easily clumping materials. Step 2: Confirm the conveying length and select 3-70m according to process requirements. Step 3: Confirm production capacity and choose the corresponding capacity based on material type (coal, cement, raw material). Step 4: Confirm motor power and select 2.2-7.5kW based on conveying volume and length. Step 5: Confirm installation foundation; it must be installed on a solid foundation and secured with anchor bolts. How to choose a bucket elevator? Step 1: Confirm the material properties. Bucket elevators are suitable for powdered, granular, small granular bulk materials. Step 2: Confirm lifting height and select the maximum lift height of 28-32.7m according to process requirements. Step 3: Confirm conveying volume and select 3-58m³/h according to production line capacity requirements. Step 4: Confirm hopper spacing and select 500-600mm according to material characteristics. Step 5: Confirm motor power and select 3-37kW based on conveying volume and lifting height. How to choose a linear vibrating screen? Step 1: Confirm the screen area and select 2.25-27m² according to processing volume. Step 2: Confirm the screen mesh size and select 0.25-5.0mm according to material particle size and grading requirements. Step 3: Confirm the screen structure and choose woven, slotted, perforated, rubber, polyurethane, or mesh screen according to material characteristics. Step 4: Confirm maximum feed size, ensure ≤250mm. Step 5: Confirm processing capacity and select 4.5-846t/h according to production line capacity. Step 6: Confirm motor power and choose 3×2 to 45×2kW based on processing capacity and screen specifications. Step 7: Confirm installation foundation; it must be installed on a solid concrete foundation, secured with anchor bolts, and equipped with a dust removal system and a central control system.

Screw Conveyor Specifications and Performance Parameters Table

Model	Conveying Length (m)	Production Capacity - Coal (t/h)	Production Capacity - Cement (t/h)	Production Capacity - Raw Material (t/h)	Motor Power (kW)	Weight (t)
GX 200×10M	3-70	8.5	7.9	7.3	2.2	0.7
GX 250×10M	3-70	16.5	15.6	13.8	3	0.95
GX 300×10M	3-70	20	21	18.7	3	1.4
GX 400×10M	3-70	54	51	45	5.5	2.1
GX 500×10M	3-70	79	84.4	74	7.5	3.2

Bucket Elevator Specifications and Performance Parameters Table

Model	Maximum Lifting Height (m)	Conveying Volume (m³/h)	Hopper Spacing (mm)	Motor Power (kW)
Type 150	28	3-8	500	3-7.5
Type 200	31.5	6-15	500	3-7.5
Type 250	30.16	10-25	500	4-11
Type 300	30.16	25-35	500	5.5-15
Type 350	31	19-40	600	7.5-18.5
Type 400	32	35-50	600	7.5-22
Type 450	32.7	42-50	600	7.5-30
Type 500	32.7	58-70	500	11-37

Linear Vibrating Screen Specifications and Performance Parameters Table

Model	Screening Surface Area (m²)	Screen Hole Size (mm)	Structure	Maximum Feeding Size (mm)	Processing Capacity (t/h)	Motor Power (kW)	Weight (kg)
ZK1022	2.25	0.25-5.0	Textile, Slotted, Perforated, Rubber, Polyurethane Screens, Woven Mesh	≤250	4.5-90	3×2	2215
ZK1230	3.6	0.25-5.0	Same as above	≤250	7.2-144	4×2	2693
ZK1237	4.5	0.25-5.0	Same as above	≤250	9.0-180	5.5×2	3118
ZK1445	6.3	0.25-5.0	Same as above	≤250	12.6-252	7.5×2	4040
ZK1645	7.32	0.25-5.0	Same as above	≤250	95.0-280	7.5×2	4572
ZK1845	8.1	0.25-5.0	Same as above	≤250	16.2-324	11×2	5436
ZK2045	9	0.25-5.0	Same as above	≤250	16.2-324	11×2	5969
ZK2060	12	0.25-5.0	Same as above	≤250	24.0-480	15×2	7558
ZK2445	10.8	0.25-5.0	Same as above	≤250	21.6-432	15×2	7439
ZK2460	14.4	0.25-5.0	Same as above	≤250	28.8-576	15×2	9235
ZK3045	13.5	0.25-5.0	Same as above	≤250	27.0-540	15×2	9659
ZK3060	18	0.25-5.0	Same as above	≤250	17.5-525	22×2	11062
ZK3645	16.2	0.25-5.0	Same as above	≤250	37.8-756	22×2	12289
ZK3652	18.9	0.25-5.0	Same as above	≤250	43.2-846	22×2	13409
ZK3660	21.6	0.25-5.0	Same as above	≤250	43.2-846	22×2	14309
ZK3675	27	0.25-5.0	Same as above	≤250	54.0-1080	30×2	17100

General Technical Parameters Table

Parameter	Screw Conveyor	Elevator	Linear Vibrating Screen
Type	Screw Conveyor	Straight-through Elevator	Linear Vibrating Screen
Applicable Materials	Powdery, granular, small block materials (coal, sand, cement, grain, etc.), not suitable for highly viscous or easily clumping materials	Powdery, granular, small particulate loose materials	Granular, powdery materials
Core Advantages	Simple structure, good sealing, easy to operate	Straight-through type, large lifting height, large conveying capacity	High screening accuracy, simple structure, easy maintenance, low energy consumption, low noise, good sealing, long screen life
Application Industries	Chemical, food, metallurgy, mining, building materials, grain, abrasives, fertilizers, coal	Chemical, food, metallurgy, mining, building materials, grain, abrasives, fertilizers, coal	Chemical, food, metallurgy, mining, building materials, grain, abrasives, fertilizers, coal

Dimension Drawings and Key Dimensions

`[Image: /images/screw-conveyor-hoist-linear-vibrating-screen-dimension-drawing.webp]`

Material Table

Component	Standard Material	Optional Material	Description
Screw Conveyor Body / Screw Blade	Carbon Steel	Stainless Steel, Wear-Resistant Steel Plate	Bears material, requires rust and wear resistance
Hoist Hopper / Chain	Carbon Steel	Stainless Steel, Wear-Resistant Alloy	Core wear part, high wear resistance
Linear Vibrating Screen Box / Frame	Carbon Steel	Stainless Steel, Wear-Resistant Steel Plate	Bears material and vibration load
Linear Vibrating Screen Mesh	High Manganese Steel, Polyurethane	Stainless Steel, Rubber, Woven Mesh	Core wear part, high wear and corrosion resistance
Drive Shaft	40Cr / 45# Steel	Alloy Steel	Quenching and tempering treatment, smooth transmission
Bearings	Self-aligning roller bearing	Double row cylindrical roller bearing	Can withstand heavy load and vibration impact
Motor	All-copper coil motor	Explosion-proof motor	Standard three-phase asynchronous motor
Control box	Carbon steel/Stainless steel	Rainproof and dustproof type	Optional variable frequency speed regulation

Installation method

Screw conveyors, elevators, and linear vibrating screens must be installed on a solid concrete foundation or steel structure support, with the foundation capable of bearing the equipment's own weight and dynamic load during operation; installation must ensure the foundation's levelness or verticality meets requirements, and anchor bolts are tightened according to torque specifications; for screw conveyors, ensure all section housings are well sealed, the clearance between screw blades and housing is uniform, and the drive device is coaxial with the screw shaft; for elevators, ensure the frame is installed vertically, the chain or belt tension is appropriate, and the hopper is securely installed; for linear vibrating screens, ensure the screen box is level, the exciter is firmly connected to the screen box, the screen mesh tension is appropriate, and the damping springs are installed vertically; after installation, perform a no-load test run and check whether each device runs smoothly and if there is any abnormal vibration or noise; during load test run, gradually increase the feed amount, observe the conveying or screening effect and motor current, ensuring it does not exceed rated current; a dust removal system must be equipped to reduce dust pollution; a central control system can be optionally equipped for online monitoring and automatic control.

Application scenario table

Industry	Application	Recommended configuration	Key requirements
Chemical industry	Conveying and screening of powdered and granular materials	Screw conveyor + elevator + linear vibrating screen	Good sealing, pollution prevention, high screening accuracy
Food industry	Conveying and screening of grains and food raw materials	Stainless steel screw conveyor + elevator + linear vibrating screen	Hygienic, easy to clean, pollution prevention
Metallurgical industry	Ore and sintered ore conveying and screening	Screw conveyor + elevator + linear vibrating screen	Wear-resistant, high-temperature resistant, large processing capacity
Mining industry	Ore and sand conveying and screening	Screw conveyor + elevator + linear vibrating screen	Large processing capacity, wear-resistant, high screening efficiency
Building materials industry	Cement, sand, and gypsum conveying and screening	Screw conveyor + elevator + linear vibrating screen	Good sealing, dust-proof, high screening accuracy
Fertilizer industry	Conveying and screening of raw and finished fertilizer materials	Stainless steel screw conveyor + elevator + linear vibrating screen	Corrosion-resistant, pollution-free, high screening accuracy
Coal industry	Coal powder and coal lump conveying and screening	Screw conveyor + elevator + linear vibrating screen	Wear-resistant, explosion-proof, large processing capacity
Grain industry	Grain and flour conveying and screening	Stainless steel screw conveyor + elevator + linear vibrating screen	Hygienic, easy to clean, high screening accuracy

Note

Screw conveyors are suitable for conveying various powdered, granular, and small block materials, but not suitable for conveying easily spoiled, highly sticky, or easily caked materials; elevators are suitable for conveying powdered, granular, and small bulk materials upward; linear vibrating screens are suitable for screening and grading granular and powdered materials. Explosion-proof motors should be selected for explosive environments. For highly abrasive materials, it is recommended to use high manganese steel, wear-resistant alloy, or polyurethane screens.

## Technical FAQ

1. What is a screw conveyor?

Screw conveyors are suitable for conveying various powdered, granular, and small block materials, such as coal, sand, coal lumps and sand, cement, cereals, etc., but are not suitable for conveying easily spoiled, highly sticky, or easily caked materials.

2. What is the working principle of a screw conveyor?

The screw conveyor operates by driving the screw shaft to rotate via a motor. Materials move axially along the casing under the push of the screw blades, achieving horizontal or inclined transport of materials.

3. What are the models of the screw conveyor?

The screw conveyor models include GX 200×10M, GX 250×10M, GX 300×10M, GX 400×10M, and GX 500×10M.

4. What are the conveying length and motor power of the screw conveyor?

Conveying length: 3-70m, motor power: 2.2-7.5kW, varying depending on the model.

5. What is the production capacity of the screw conveyor?

Production capacity: coal 8.5-79 t/h, cement 7.9-84.4 t/h, raw material 7.3-74 t/h, varying depending on the model.

6. What is an elevator?

The elevator is of the straight-through type, suitable for vertically conveying powdered, granular, or small granular bulk materials. It can be used under different operating conditions and is widely applied in many industrial sectors.

7. What is the working principle of the elevator?

The elevator operates by a motor driving a chain or belt to move buckets upwards. Materials are loaded into the buckets from the bottom, carried to the top, and then discharged by tipping, achieving vertical transport of materials.

8. What are the models of the elevator?

Elevator models include 150 type, 200 type, 250 type, 300 type, 350 type, 400 type, 450 type, and 500 type.

9. What are the maximum lifting height and conveying capacity of the elevator?

Maximum lifting height: 28-32.7m, conveying capacity: 3-58 m³/h, varying depending on the model.

10. What is the motor power of the elevator?

Motor power: 3-37 kW, varying depending on the model.

11. What is a linear vibrating screen?

Compared with the shaker, electromagnetic vibration, and rotary vibrating screen, the linear vibrating screen has the characteristics of high screening accuracy, simple structure, easy maintenance, low energy consumption, low noise, good sealing, reduced dust pollution, and long screen lifespan. It is widely used in chemical, food, metallurgical, and mining industries.

12. What is the working principle of the linear vibrating screen?

The linear vibrating screen generates a vibrating force through a vibrator, causing the screen box to reciprocate in a straight line. The material is lifted on the screen surface and moves forward. Particles smaller than the screen openings pass through the screen to become the undersize product, while particles larger than the openings are discharged from the end of the screen, achieving material screening and grading.

13. What are the models of the linear vibrating screen?

The models of the linear vibrating screen include ZK1022, ZK1230, ZK1237, ZK1445, ZK1645, ZK1845, ZK2045, ZK2060, ZK2445, ZK2460, ZK3045, ZK3060, ZK3645, ZK3652, ZK3660, ZK3675, and others.

14. What are the screen area and screen opening sizes of the linear vibrating screen?

The screen area ranges from 2.25 to 27 m², and the screen opening size ranges from 0.25 to 5.0 mm, depending on the model.

15. What are the processing capacity and motor power of the linear vibrating screen?

The processing capacity ranges from 4.5 to 846 t/h, and the motor power ranges from 3×2 to 45×2 kW, depending on the model.

16. What types of screen structures are available for the linear vibrating screen?

Screen structures include woven, slotted, perforated, rubber, polyurethane, and mesh screens, which can be chosen according to material characteristics.

17. What are the wearing parts of these three types of equipment?

For the screw conveyor, the screw blade and casing; for the elevator, the hopper and chain; for the linear vibrating screen, the screen, vibrator, and springs. It is recommended to use high manganese steel, wear-resistant alloys, polyurethane, or stainless steel.

18. What are the common faults of these three types of equipment?

Common faults of screw conveyors: blockage (high material viscosity or excessive feeding), screw blade wear (strongly abrasive material), bearing overheating (poor lubrication or overload). Common faults of bucket elevators: chain breakage (overload or wear), hopper falling off (loose connection or wear), abnormal vibration (uneven chain tension or loose foundation bolts). Common faults of linear vibrating screens: screen damage (strongly abrasive material or insufficient tension), vibrator overheating (poor lubrication or overload), spring failure (fatigue or breakage), abnormal vibration (vibrator imbalance or loose foundation bolts).

19. Do these three types of equipment require a foundation?

All need to be installed on a solid concrete foundation or steel structure support. The foundation must withstand the self-weight of the equipment and the dynamic load during operation, with foundation bolts for fixation. Linear vibrating screens require a higher level of foundation leveling.

20. How to choose these three types of equipment?

Screw conveyor: choose the model according to the material properties, conveying length, and conveying capacity; confirm production capacity based on material type (coal, cement, raw material).

Bucket elevator: choose the model according to the material properties, lifting height, and conveying capacity; select hopper spacing and motor power according to material characteristics.

Linear vibrating screen: select the screen area according to the processing capacity; choose the screen mesh size according to the material particle size and grading requirements; select the screen structure according to material characteristics; choose processing capacity and motor power according to production line requirements.

Technical FAQ

What determines screen capacity?

Feed rate, bulk density, moisture, particle-size distribution, deck area and required separation cut all affect capacity.

Do I need washing or only dry screening?

Choose washing when clay or adhered fines affect product quality. Confirm water source, recycling and discharge treatment.

Authoritative references

For standards and safety context, see ISO standards and the U.S. Mine Safety and Health Administration. Confirm the exact local requirements for your project.

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