As urbanization accelerates, the infrastructure sector is experiencing a period of rapid growth. The surge in market demand has directly driven technological innovations in sand-making equipment. In modern sand and gravel processing systems, the efficient operation of production equipment heavily relies on the support of key wear-resistant components.
1. Detailed Process Flow of Intelligent Sand-Making Systems
Modern sand and gravel production lines adopt a modular design concept, and their core processes can be broken down into the following steps:
● Raw Material Preprocessing System: The vibrating feeder (handling capacity of 200-800t/h) combined with a heavy-duty plate feeder ensures the uniform transport of pebble raw materials.
● Multi-stage Crushing System:
◎ Jaw Crusher (PE600×900 to PE1500×1800 models)
◎ Cone Crusher (HPT300/HST315 and other hydraulic models)
◎ Vertical Shaft Impact Crusher (VSI6X1263/VSI5X1145 and other new models)
● Finished Product Processing System: The wheel bucket sand washer, combined with a fine sand recovery device, produces five specifications of finished sand (with fine sand (0-5mm) accounting for more than 35%).
2. Classification and Technical Requirements of Key Wear-Resistant Components
Based on the production process, the main wear-resistant parts include:
● Coarse Crushing Stage:
◎ Jaw Crusher Jaw Plates/Side Guards: Cast with modified high manganese steel (ZGMn18Cr2), with a working surface hardness of HB500.
● Medium and Fine Crushing Stage:
◎ Cone Crusher Concave/Crusher Mantle: Inlaid with tungsten-titanium alloy blocks, impact toughness value ≥12J/cm².
● Sand Making and Shaping Stage:
◎ Impact Sand Maker Feed Cone: 3D surface design, made of Cr30Mo high-molybdenum alloy.
◎ Flow Channel Plate: Equipped with adjustable wear-resistant blocks, with a service life of over 3,000 hours.
◎ Surrounding Guard Plate: Modular assembly structure, allowing for localized wear to be replaced independently.
3. Technological Innovation Trends in Wear-Resistant Materials
Specialized foundries such as Duma Machinery have focused their recent research and development efforts on the following areas:
◎ Bimetallic Composite Casting Technology: The base material uses ZG35SiMn to ensure toughness, while the working surface is cladded with a Cr28 high-chromium layer.
◎ Gradient Functional Materials: Achieving a continuous transition in hardness from HB300 to HB600 through directional solidification technology.
◎ Intelligent Monitoring Systems: Sensors embedded inside vulnerable parts to monitor wear levels in real-time and provide early warnings.
It is important to note that the new version of the "Sand and Gravel Aggregate Plant Design Code" (GB51186-2022) explicitly requires that the design life of core wear-resistant components should meet the following standards: coarse crushing parts ≥ 3 months, fine crushing parts ≥ 2 months, and shaping parts ≥ 1.5 months of continuous production demand. This has prompted wear-resistant parts manufacturers to continuously improve product performance, driving the industry toward greater efficiency and energy savings.
