1. What is Two-Stage Crusher?

A Two-Stage Crusher (SF Series), also known as a double-rotor hammer crusher, is a high-efficiency crushing machine engineered with two vertically aligned rotor chambers. By passing raw materials through two sequential crushing stages within a single housing, it converts coarse material into fine, uniform particles. Its grate-free bottom design eliminates clogging, making it an ideal fine crushing solution for moist, sticky organic waste and industrial minerals.

2. How does Two-Stage Crusher work?

Raw materials enter the upper crushing chamber through the top inlet. Driven by two independent high-torque electric motors (22kW×2 or 37kW×2) at a rotational speed of 1000 r/min, the upper rotor’s high-speed hammers strike and crush the incoming bulk material into medium-sized pieces.

The pre-crushed material immediately drops into the lower chamber, where the secondary high-speed rotor performs deep fine crushing and shearing. Because the bottom has no screen bars or grate plates, the finely ground particles discharge smoothly via gravity, achieving a continuous throughput of 6–10 t/h (SF600) or 8–15 t/h (SF800) without material build-up.

3. Advantages of Two-Stage Crusher

• Dual Rotor Two-Stage Fine Crushing: Equivalent to combining two crushers in series, achieving superior particle reduction ratio and high fine-product yield.
• Non-Clogging & Screenless Bottom: Designed without bottom screens or grate bars, completely solving blockages when processing high-moisture livestock manure, sludge, and wet clay.
• Dual Motor Independent Drive: Equipped with twin high-torque motors (22kW×2 or 37kW×2), providing strong power reserves and stable operation under heavy loads.
• Wear-Resistant Alloy Hammers: Hammers are forged from high-chromium alloy materials, offering multi-angle usage and extended service life to reduce wear costs.

4. Application of Two-Stage Crusher

• Organic & Compound Fertilizer Plants: Fine crushing of fermented poultry manure, bio-sludge, urea, and damp raw materials prior to granulation.
• Mining & Building Materials: Processing medium-hard ores, limestone, shale, coal gangue, and clay.
• Livestock Waste Recycling: On-site fine grinding of cow, swine, and chicken manure compost.
• Chemical & Industrial Waste Treatment: Size reduction of chemical salts, industrial slag, and solid municipal waste.

5. Specifications of Two-Stage Crusher (SF Series)