Currently, with the depletion and restricted extraction of natural sand resources, manufactured sand is gradually being widely adopted. Consequently, the configuration of manufactured sand production lines is increasing. In the aggregate production line, the selection of crushing equipment and crushing combinations is often the primary consideration. This article introduces the characteristics of five commonly used crushing equipment and compares three types of production line configurations for reference.

      Comparison of Features Among 5 Common Crushing Equipment Types

　　In domestic aggregate production, crushing equipment typically employs a two-stage process: primary crushing and secondary crushing. For primary crushing, hammer crushers or jaw crushers are commonly used, while secondary crushing often utilizes impact crushers, gyratory crushers, or cone crushers.

　　1) Jaw Crusher

Advantages: Simple structure, lightweight, low cost, easy to install and maintain, requiring minimal plant height, reliable operation, convenient adjustment of the

discharge opening, and particularly resistant to clogging when processing ores with high moisture content and strong viscosity.  

Disadvantages: The lining plate is prone to。

　　2) Hammer Crusher

　　Advantages: Simple process and structure, relatively lower cost;

Disadvantages: Low yield of largesized aggregates after hammer crushing, prone to overcrushing with excessive powder content. The finished aggregates may develop micro-cracks, resulting in reduced compressive strength, compromised aggregate quality, and negative impact on sales.

　　3) Impact Crusher

　　Advantages: compact size, simple structure, high crushing ratio, low energy consumption, uniform product granularity, excellent particle shape, and selective ore crushing capability.　Disadvantages: The hammer and impact plate are particularly prone to wear, especially when crushing hard ores, where the wear becomes even more severe, necessitating frequent replacement.

　　4) Gyratory Crusher

　　Advantages: high processing capacity, excellent product particle shape, low energy consumption per unit product, no need for feeding equipment, and even wear of the lining plates in the crushing chamber.

　　Disadvantages: The equipment has a complex structure, is expensive, heavy in weight, requires a solid foundation, has a tall body that demands high workshop ceilings, involves substantial civil engineering investment costs, and is difficult to maintain.

　　5) Cone Crusher

　　Advantages: Cone crushers are primarily suitable for crushing rocks with high hardness and abrasiveness indices, offering the benefits of strong crushing force and stable operation.  

Disadvantages: The equipment is expensive, requires significant investment, and produces poorer particle shapes, often resulting in needle-like or flaky particles.

　　Comparison of Three Common Production Line Configurations   The selection of crushing equipment and configuration for aggregate production lines is primarily influenced by factors such as production scale, financial conditions, maintenance workload, product performance, and material gradation requirements. Among the operational aggregate production lines in China, those with capacities of 200tph, 300tph, 400tph, and 500tph are relatively common. For largerscale lines of 1000tph or above, cone crushers or gyratory crushers are predominantly employed. Due to their higher equipment investment and infrastructure installation costs, these configurations are mainly adopted by large enterprises.   The most frequently used crushing configurations include:   - Jaw crusher + impact crusher   - Impact crusher + impact crusher   - Jaw crusher + cone crusher

　　1) Key features of the jaw crusher + impact crusher combination: excellent product granularity, low total investment, reduced energy consumption, minimal fine material generation, moderate maintenance and operational costs, and manageable environmental impact in terms of noise and dust emissions.

　　Case: 500t/h Limestone Crushing Production Line

　　Equipment configuration: jaw crusher, impact crusher, feeder, vibrating screen, conveyor, and other equipment.

　　2) Features of the Impact Crusher + Impact Crusher Combination:   The product exhibits excellent particle size distribution but comes with high energy consumption, elevated maintenance and operational costs, significant noise and dust generation, and substantial environmental impact. The proportion of 05mm finished products is relatively high, making this configuration primarily suitable for enterprises with substantial demand for manufactured sand.

3) Key Features of Jaw Crusher + Cone Crusher Combination: Suitable for crushing rocks with high hardness and abrasiveness index, producing minimal powdery material. It offers low maintenance and operational costs, generates less noise and dust compared to the previous two options, though requires higher initial investment and energy consumption. The downside is poorer product particle shape (mostly flaky or needle-like).

　　Case Study: 450t/h Granite Crushing Production Line

　　Equipment configuration: jaw crusher, cone crusher, vibrating feeder, belt conveyor, circular vibrating screen, etc.

　　For a detailed comparison of each combination, please refer to the figure below:

　　With the application of new technologies and materials, crushing equipment and their configurations will exhibit new characteristics. For instance, technological upgrades to fine-crushing cone crushers have significantly reduced the production of needle-shaped and flaky particles. Through rational analysis and trade-offs among various influencing factors and the specific conditions of enterprises, the optimal solution can undoubtedly be achieved.