The sand and gravel aggregate market remains hot, with an increasing demand for manufactured sand and gravel aggregates from more and more infrastructure projects. How to design an efficient sand and gravel aggregate production line and rationally configure the required equipment is a focus of attention for many infrastructure professionals.

More Sand and Gravel Aggregate Production Lines

More Sand and Gravel Aggregate Production Lines

Below is a typical process flow of a manufactured sand and gravel aggregate production line and its common equipment configuration schemes:

I. Coarse Crushing Feeding Equipment

There are two main types of coarse crushing feeding equipment: bar feeders and heavy-duty plate feeders. Bar feeders can also perform preliminary screening during the feeding process, removing some impurities such as mud.

II. Coarse Crushing Equipment

In sand and gravel aggregate production, jaw crushers are common coarse crushing equipment. They crush larger materials into medium-sized materials, facilitating subsequent crushing operations.

III. Intermediate Stockpile

The intermediate stockpile after coarse crushing can be divided into two sections to accommodate downtime of the upstream equipment due to mine supply, road transportation, or equipment maintenance. In this way, downstream equipment can continue production using the material stored in the intermediate stockpile, ensuring operational continuity.

IV. Pre-screening before intermediate crushing: Pre-screening removes materials smaller than the discharge size for intermediate crushing, preventing over-crushing. The screen size also controls the amount of material entering the intermediate/fine crushing or shaping equipment and the maximum feed size. Optimized configuration allows for a reduction in the size or number of crushing equipment units.

V. Intermediate crushing equipment: The intermediate crushing cone crusher and the pre-screening equipment form a closed-loop system, thus the pre-screening equipment also serves as a check screen. Materials with a screen size smaller than 12mm can be directly used as raw material for manufactured sand without re-entering the crushing system. This avoids over-crushing and helps release the crushing system's capacity.

VI. Shaping and sand making equipment: The third stage of crushing uses a vertical shaft impact crusher, which combines crushing and shaping functions. After processing by the vertical shaft impact crusher, the material enters the finished product screen. The finished product screen and the vertical shaft impact crusher form a closed-loop system, ensuring the quality of the final product.

VII. Finished Product Screening Equipment A flap valve is installed at the finished product screening hopper, allowing a portion of the finished aggregate to be returned to the vertical shaft impact crusher for further crushing. This adjusts the final product output ratio, making system control more flexible.

Rational design of the sand and gravel aggregate production line and scientific equipment configuration are key to improving production efficiency and product quality. By adopting advanced crushing, screening, and sand making equipment, resource utilization can be maximized, production costs reduced, and product quality ensured to remain stable. Shibang Group provides complete sets of manufactured sand and gravel production line equipment, characterized by high efficiency, stability, and environmental friendliness, providing strong support for customers to achieve efficient production and sustainable development.