For the crushing needs of concrete blocks with a processing capacity of 50-100tph, it is necessary to take into account the characteristics of construction waste (including steel bars, light material impurities) and the quality of recycled aggregates. It is recommended to adopt a modular, movable and compact configuration solution, focusing on efficient crushing, impurity sorting and flexible transfer.
1. Core equipment configuration solution
Coarse crushing unit
Configure a jaw crusher with a feed size of ≥650×900mm, a processing capacity of 80-120tph, a crushing strength of ≤200MPa concrete blocks, and a discharge particle size of ≤200mm. It is recommended to equip it with a hydraulic adjustment discharge port device (adjustment range 50-200mm) and an integrated iron remover to automatically separate metal impurities such as steel bars.
Medium and fine crushing unit
Use an impact crusher or heavy hammer crusher (processing capacity 60-100tph), equipped with an anti-winding rotor design to avoid steel bar residue. The particle size of the material can be adjusted to 0-40mm, and the needle-like content is less than 15%, which meets the requirements of recycled aggregate C25-C30 concrete mixing.
Screening system
Equipped with a 3-layer vibrating screen (screen surface size ≥1800×4800mm), through the 25mm, 15mm, 5mm three-layer screen classification, to produce 0-5mm fine aggregate, 5-15mm medium aggregate and 15-25mm coarse aggregate. Rubber spring shock-absorbing structure is recommended to adapt to the vibration working conditions of the mobile frame.
2. Auxiliary system optimization
Pretreatment section: Set up a chain plate feeder (with a grid screen) to remove large pieces > 400mm, and configure a manual sorting platform to remove light materials such as plastics and wood.
Iron removal enhancement: In addition to the main crushing section iron remover, a suspended iron remover is added to the return belt, and the metal removal rate is > 98%.
Dust and noise reduction: Pulse bag dust collector (air volume ≥ 12000m³/h) combined with fog cannon unit, the noise in the working area is ≤ 75dB.
Mobile design: Optional crawler/tire mobile crushing station, the unit deployment time is less than 30 minutes, and no foundation construction is required for transfer.
3. Key points of process design Closed-loop circulation
The vibrating screen and impact crusher form a closed-loop system, and > 25mm aggregates are returned for secondary crushing, increasing the yield to more than 90%.
Impurity control: After coarse crushing and before fine crushing, an artificial sorting belt is set up, and 0.5-5kg/m³ light materials are removed with air separation equipment.
Flexible adjustment: By changing the screen (diamond hole/square hole) and adjusting the rotor speed (600-1200r/min), it is suitable for the production of recycled aggregates of different strengths from C15 to C40.
This configuration has an installed power of ≤350kW and occupies an area of about 800-1200㎡. It can process construction waste such as demolished concrete blocks and road renovation materials. The crushing value of the finished aggregate is ≤12%, and the water absorption rate is ≤5%, which meets the GB/T 25177-2010 recycled aggregate standard. It is recommended to configure a diesel/electric dual power system to adapt to off-grid operation scenarios, and the comprehensive operating cost is reduced by more than 30% compared with fixed production lines.
