Heavy Duty U-Trough Screw Conveyor for Bulk Material

What is Heavy Duty U-Trough Screw Conveyor for Bulk Material?

Industrial applications: When handling large quantities of highly abrasive and dense bulk materials in industrial settings, conventional conveying equipment often experiences unplanned downtime due to blade wear or insufficient power. The Heavy Duty U-Trough Screw Conveyor for Bulk Material is designed to overcome this challenge. To withstand the intense abrasion from hard ores and construction gravel, this equipment combines wear-resistant alloy steel blades with a thickness of 10mm to 16mm with a high-torque transmission system, maintaining a stable conveying capacity of 5m³/h to 150m³/h per unit.

 

Combined with a large screw diameter of Φ200mm to Φ600mm, this not only increases the physical volume of a single conveying operation but also reduces frictional wear on the trough surface caused by high-hardness particles through a low-speed operating mode, solving the problems of mechanical jamming and rapid wear under high material flow rates.

Components of a Heavy-Duty U-Trough Screw Conveyor

The heavy-duty U-trough screw conveyor consists of four main components. The trough body abandons the conventional 3mm thin plate, replacing it with 8mm or 12mm high-strength carbon steel plates continuously welded together, making it less prone to twisting when carrying heavy mineral sands. The internal screw shaft uses thick-walled seamless steel pipes and dynamically balanced solid blades to prevent shaft sagging during long-distance operation. The intermediate hanger bearing uses external self-aligning roller bearings with split packing seals to physically isolate fine dust. The drive end is equipped with a heavy-duty gear reducer with a high overload coefficient, increasing output torque by more than 30% and enabling direct load-bearing start-up.

What are the advantages of using a heavy-duty U-trough screw conveyor to transport bulk materials?

The top cover of the heavy-duty U-trough screw conveyor achieves a strong physical seal through bolts and 5mm thick rubber gaskets. When transporting dusty materials, it can lock 99% of dust particles inside the trough, ensuring that the workshop air quality meets production standards. The removable top cover design allows maintenance workers to easily inspect and clear any sudden blockages by simply unscrewing surface bolts in 10 minutes, reducing maintenance time by 80% compared to the complete disassembly required for tubular conveyors. The addition of a 10mm thick high-hardness NM400 wear-resistant steel liner to the bottom trough extends the overall wear cycle of the equipment by three times, reducing unplanned downtime and thus lowering the overall maintenance costs of the entire production line over its 5- to 10-year lifespan.

Model Parameter Table

Model	Screw Diameter (Φmm)	Trough Thickness (mm)	Blade Thickness (mm)	Capacity Range (m³/h)	Recommended RPM	Max Motor Power (kW)
LS-HD200	200	6 - 8	10	5 - 15	45 - 60	4.0
LS-HD250	250	6 - 8	10	10 - 25	45 - 55	5.5
LS-HD315	315	8 - 10	12	20 - 50	40 - 50	7.5
LS-HD400	400	8 - 12	12	40 - 80	35 - 45	11.0
LS-HD500	500	10 - 12	14	70 - 120	30 - 40	15.0
LS-HD600	600	12 - 16	16	100 - 150	25 - 35	22.0

How much does a heavy-duty U-shaped trough screw conveyor for conveying bulk materials cost?

Regarding procurement costs, the price of this type of customized heavy machinery typically fluctuates between $3,500 and $28,000 on the international market. Factors affecting the final investment include material differences, conveying distance, and the type of motor used. The price of raw materials differs depending on whether carbon steel Q355B, wear-resistant steel NM400, or corrosion-resistant stainless steel 316L is used. For every 1m increase in the total conveying length, the number of troughs, screw shafts, and corresponding hanger bearings increases linearly. Using motors and reducers from multinational brands like SEW (Germany) and Siemens will result in higher initial procurement costs than ordinary domestic brands, but their long-term stability will differ.

Applications of Heavy-Duty U-Trough Screw Conveyors

In industrial conveying, this machinery undertakes the task of displacing bulk materials in various high-pollution and high-abrasion environments. The table below lists the specific material categories that this equipment is recommended to convey.

Material Name	Bulk Density (t/m³)	Typical Application Industry	Model Selection & Configuration Recommendation
Coal / Coal Powder	0.8−1.0	Power Plant, Coking Plant	Use explosion-proof motor with standard screw pitch
Cement Clinker	1.2−1.4	Building Material Plant, Cement Production Line	Adopt 12mm thickened wear-resistant blades
Crushed Iron Ore	2.2−2.6	Metallurgy, Mining & Ore Dressing Plant	Low RPM with replaceable liner plates installed
Dehydrated Sludge	1.0−1.2	Sewage Treatment Plant	Shaftless screw structure to avoid material adhesion
Fly Ash	0.7−0.9	Eco-brick Factory, Concrete Batching Plant	Reinforced silicone rubber sealing strips for trough sealing

Case Study of Heavy-Duty U-Trough Screw Conveyors

A tailings conveying project at a gold mine in Australia initially used a conventional tubular screw conveyor to transfer high-hardness quartz sand wet slag. After 45 days of operation, the pipe wall wore through and leaked slurry, and the intermediate bearings burned out every two months due to sand jamming. The plant then introduced a customized Heavy Duty U-Trough Screw Conveyor. The machine is 9m long with a 400mm screw diameter. It features a 10mm thick NM400 wear-resistant liner at the bottom and its central hanger bearing has been replaced with a self-lubricating graphite alloy bearing. After the modification, the equipment operates continuously at a low speed of 35RPM, processing an average of 240 tons of slag per day. It has been running stably for over 18 months without significant perforation, eliminating the need for frequent downtime for parts replacement.

The Heavy Duty U-Trough Screw Conveyor for Bulk Material, with its high-walled, thick-walled tank, reinforced screw shaft, and external sealing structure, demonstrates mechanical rigidity in handling the demanding bulk material conveying requirements of heavy industry. Understanding its price fluctuation factors and combining them with specific material parameters for tailored selection can ensure continuous and stable operation of the production line and reduce mid-to-late-stage maintenance costs.