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| Analysis of Crusher Design and Equipment Selection for Hard Rock Aggregate Production Line |
| CNBM Equipment Group， Tianjin Cement Industry Design & Research Institute Co., Ltd. , Tianjin 300133, China |
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Abstract Sand and gravel aggregates are essential raw materials for infrastructure construction. This paper takes a hard rock aggregate production line project in Northwestern China as an example to discuss the process flow comparison and equipment selection calculation methods during the pre-project design stage. First, the raw material characteristics and the performance of impact crusher, jaw crusher, cone crusher and applicable conditions of commonly used crushers were analyzed. Through comparison, a three-stage and one closed-circuit crushing process of primary jaw crusher + secondary cone crusher + tertiary cone crusher and closed-circuit screening was proposed, and parameters such as size reduction ration and opening outlet width(CSS) of each section stage. Then, base on the project scale (annual output of 2.5million tons) and product requirement (5~31.5mm high-end aggregates and high-quality machine-made sand), the each stage crushing capacity and maximum circulation of the crushers are calculated separately. Finally, the hard rock aggregate crushing equipment type are selected based on the calculation results. Practical application of the project showed that the design scheme was consistent with the actual production process and crusher selection, and the product output and quality met the contract requirements. This can serve as a reference for the preliminary scheme design of similar hard rock aggregate production line projects.
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Received: 09 January 2025
Published: 22 September 2025
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