A Secondary Impact Crusher is a type of crushing machine used in aggregate production, tái chế, and mining operations to reduce the size of materials after primary crushing. It is designed to handle softer to medium-hard materials (ví dụ., đá vôi, nhựa đường, bê tông, chất thải phá dỡ) and produce a more uniform, cubical end product compared to primary crushers.

Key Features of a Secondary Impact Crusher:
1. Mục đích:
- Further reduces material size after primary crushing (ví dụ., hàm hoặc hàm vỏ).
- Ideal for producing high-quality, well-shaped aggregates for construction (đường, bê tông).

2. Nguyên tắc làm việc:
- Uses high-speed impact forces (rotor with hammers/blow bars) to break materials.
- Material is fed into the crushing chamber and struck by rotating blow bars before being thrown against impact aprons/liners for additional fragmentation.

3. Thuận lợi:
- Produces a more uniform, sản phẩm hình khối (better for asphalt and concrete).
- Higher reduction ratio than cone crushers in certain applications.
- Adjustable output size via hydraulic or mechanical settings.
- Handles moderately abrasive materials efficiently.

4. Nhược điểm:
- Higher wear on blow bars compared to compression crushers (ví dụ., máy nghiền hình nón).
- Not ideal for very hard or highly abrasive materials (ví dụ., đá granit).

5. Ứng dụng phổ biến:
- Crushing limestone, bê tông tái chế, nhựa đường, và mảnh vụn phá hủy.
- Aggregate production for road base, dằn đường sắt, and construction fill.

6. Types of Secondary Impact Crushers:
- Bộ va chạm trục ngang (HSI): Most common for secondary crushing; material is fed horizontally into the rotor.
- V.

ical Shaft Impactors (MỌI NGƯỜI): Used for shaping and fine crushing (more common in tertiary stages).

Comparison with Other Crushers:
| Tính năng | Máy nghiền tác động thứ cấp | Máy nghiền hình nón | lời nguyền hàm |
||-|--|-|
| Crushing Method | Impact force | nén | nén |
| Hình dạng đầu ra | Cubical | Flaky/Elongated | Biến |
| Mặc & Trị giá | Higher wear on blow bars | Lower wear parts | Moderate wear |
| Best