BW-1500 Heavy-Duty Apron Feeder - The Heavyweight Core Equipment for Large-Scale Mining and Ultra-Hard Material Primary Crushing Feed

The core difference lies in the feeding principle and applicable conditions. The ZSW vibrating feeder relies on the high-frequency excitation force of dual vibrating motors to propel material forward in a parabolic trajectory — suitable for maximum feed sizes up to 600 mm and medium-density materials (limestone, dolomite, etc.), with the added benefit of grizzly bar pre-screening. The BW apron feeder relies on chains dragging heavy-duty pans at low speed to push material forward — suitable for maximum feed sizes over 1000 mm and extreme heavy-duty feeding of high-density, highly abrasive materials (iron ore, granite, basalt, etc.), but without pre-screening capability. In short: small-to-medium limestone lines choose ZSW; large hard-rock mines choose BW.

The BW-1500 comes standard with a VFD-driven 37 kW motor, with apron speed steplessly adjustable from 0.02 to 0.16 m/s. Interlocking with the downstream crusher can be achieved in two ways: manual mode, where the operator adjusts the VFD frequency based on the crusher ammeter reading; and automatic mode, where the crusher motor's current or power signal is collected and fed back to a PLC control system, which automatically adjusts the apron feeder's speed — slowing or stopping feed when crusher current exceeds the set upper limit, and speeding up when it falls below the lower limit, achieving closed-loop automatic matching between feed volume and crushing capacity.

Under standard operating conditions of 8-10 hours per day processing highly abrasive materials like granite or iron ore, Mn18Cr2 high-manganese steel pans typically last 12-24 months. Actual life depends on material abrasiveness, feed volume, and installation angle. Pans are bolted to chain attachments — replacing a single pan requires only removing 4-6 bolts without disassembling the chain, making on-site replacement very convenient. During routine inspections, focus on the overlap seal surface of the pans — when the seal fails and noticeable fines leakage occurs, replacement should be scheduled promptly.

The BW-1500 uses a tail screw take-up device — by rotating the adjusting screws on both sides of the tail sprocket bearing housing, the tail wheel position changes to adjust chain tension. Under standard conditions, chain tension adjustment intervals are 3-6 months. During the initial break-in period of a new unit (first 100 hours), chains experience some initial elongation — we recommend checking and adjusting tension after the 1st week, 2nd week, and 1st month of operation. During daily inspections, chain sag can be observed to determine if adjustment is needed — when sag exceeds 2 times the chain pitch, tensioning should be performed promptly.

Absolutely — the maximum recommended installation angle is 25°. When installed on an incline, material flows more easily with the assistance of the gravity component, and apron speed can be appropriately reduced to minimize wear. However, note that the steeper the angle, the smaller the effective cross-sectional area of the carrying pans (material tends to slide toward the lower end), and actual capacity will decrease accordingly. At angles exceeding 15°, we recommend adding lateral baffles (skirt plates) on the pans to prevent material rollback. Horizontal or slight incline installation (0°-5°) is the recommended approach for handling extra-large material blocks, ensuring even material distribution and stable conveying on the pans.

Apron feeders have a natural advantage when handling high-mud-content ROM. Unlike vibrating feeders, the apron feeder's pans convey material via low-speed pushing — there is no high-frequency vibration causing mud adhesion and buildup. The overlapping pan structure effectively prevents muddy fines from leaking through. However, when mud content is extremely high (>15%) with significant moisture, mud may accumulate at the pan overlap surfaces and chain pin joints. In such conditions, we recommend increasing the frequency of tail sprocket and chain washdown cleaning, or optionally installing sprocket scraper blades. For high-mud applications, we also recommend adding a circular vibrating scrubber screen upstream of the apron feeder for pre-desliming.

Yes, absolutely. We provide a comprehensive 12-month warranty for the BW-1500 apron feeder covering the main machine structure and frame (excluding consumable wear parts such as apron pans, chains, and pins), protecting against structural failures caused by manufacturing defects or material quality issues, backed by full remote technical support and genuine OEM parts availability.