Reversible Hammer Crusher

Advantages of Reversible Hammer Crusher

• Introduction to the Reversible Hammer Crusher

  The reversible hammer crusher (PCK series) is a secondary and fine crushing machine featuring a rotor capable of bidirectional rotation. It is specifically designed for medium-hard, brittle materials like limestone, coal, coal gangue, and gypsum. It accepts feed sizes up to 140mm, produces adjustable output sizes of 15mm or less, and offers capacities ranging from 25 to 350 t/h.=

  Key Differentiators: Three Unique Advantages

  1. Bidirectional Rotor — Hammer lifespan extended by 30–50%

  Traditional hammer crushers feature rotors that rotate in only one direction, meaning the hammer heads always strike the material on the same side—leading to wear-related failure on that side after just 200–300 hours. The PCK rotor can switch between forward and reverse rotation; once one side wears down, the machine switches to the other side, effectively doubling the service life of a single set of hammers to 500–700 hours. This reduces the annual number of shutdowns for hammer replacement by half.

  2. Reverse-Rotation Self-Cleaning — No clogging even with 15% moisture content

  If high-moisture material causes slight clogging of the screen plate, the machine can automatically clear the blockage by running in reverse for 2–3 minutes; the reverse-moving hammers break up and discharge the material stuck in the screen holes. No manual intervention or machine disassembly is required.

  3. Single Machine Replaces Multi-Stage Systems — 40–60% savings on primary equipment investment

  Taking an 80 t/h limestone processing line as an example: while a traditional setup requires a three-stage configuration—jaw crusher, impact crusher, and hammer crusher—the PCK1212 single-unit solution can handle the entire process on its own. 

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   medium hardness crusher

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   coal crusher

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   limestone crusher

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   PCK hammer crusher

• Application Scenarios for Reversible Hammer Crushers

  1. Limestone Aggregate/Manufactured Sand Production Lines

  Recommended models: PCK1012 (70–90 t/h) or PCK1212 (90–120 t/h), paired with a 2YK1860 vibrating screen.

  Actual output data (limestone, 1.6 t/m³):

  • 0–5mm finished sand: 55–65%

  • 5–10mm aggregate: 20–25%

  • 10–15mm aggregate: 10–15%

  Overall sand yield: ≥75% (including recirculated material)

  2. Limestone Powder Preparation for Power Plant Desulfurization

  Industry background: Flue-gas desulfurization (FGD) systems in coal-fired power plants have strict requirements for limestone powder particle size—typically requiring 90% to pass through a 325-mesh (44μm) screen. Limestone powder preparation is the upstream stage of the desulfurization system, with annual demand reaching tens of millions of tons.

  Why choose PCK for fine crushing:

  • Produces uniform output (≤10mm), providing ideal feed size for ball mills—reducing feed size by 5mm lowers ball mill power consumption by 8–12%

  • Hammer heads wear on both sides, minimizing the impact of maintenance on continuous desulfurization feed supply

  • Recommended models: PCK1214 (120–150 t/h) or PCK1416 (160–250 t/h), suitable for 200–300 MW power units

  3. Coal and Coal Gangue Crushing in Coal Mines/Preparation Plants

  Industry background: Coal and coal gangue often exhibit significant fluctuations in moisture content (5–15%), making them "nightmare materials" for traditional crushing equipment—causing chamber clogging, material adhesion, and sharp drops in output. The reversible hammer crusher's reversing mechanism for clearing blockages offers a distinct advantage in this scenario.

  Recommended models: PCK1212 or PCK1214. Coal has a low density (0.8–1.4 t/m³); consequently, the actual processing capacity of the same machine model is 10–30% higher when handling coal compared to limestone.

  Key Data:

  • No downtime required for clearing blockages when moisture content is ≤15%.

  • The proportion of coal fines (≤3mm) produced can be precisely controlled via screen plate aperture size.

  • Recommended hammer material: High-manganese steel (ZGMn13) rather than high-chromium cast iron (as the sulfur content in coal is corrosive to high-chromium cast iron).

  4. Crushing Gypsum/Phosphogypsum for Building Materials

  Industry Context: Gypsum board, gypsum powder, and cement retarder applications require a gypsum particle size of 0–15mm, while minimizing the generation of excessive ultra-fine powder (which increases dust and material loss). Reversible hammer crushers offer distinct advantages in this scenario due to their high reduction ratio and controllable output size.

  Recommended Models: PCK1010 (35–70 t/h) or PCK1012 (70–90 t/h); these models cover the mainstream capacity requirements for small-to-medium-sized gypsum plants.

  5. Construction Waste Recycled Aggregate (Brick-Concrete/Concrete)

  Industry Context: The resource utilization rate of construction waste in China has risen to approximately 55% (Ministry of Housing and Urban-Rural Development, 2024). Brick-concrete construction waste is characterized by low hardness but contains rebar, placing high demands on the crushing equipment's impact resistance and blockage-clearing capabilities.

  Important Considerations: Construction waste must pass through an iron remover to extract rebar before entering the PCK crusher to prevent rotor entanglement. Recommended hammer material: High-manganese steel (offering good toughness and impact resistance) rather than high-chromium cast iron (which is brittle and prone to fracturing upon contact with rebar).