This project features a custom-engineered 250 TPH granite crushing & screening production line, designed by JXSC Mining Machinery for a client in Indonesia. To address the specific characteristics of granite—namely its high hardness and strong abrasiveness—the entire line configuration was optimized, adopting a combined design featuring a “jaw crusher + two cone crushers + three-stage screening” setup. Furthermore, the system produces finished aggregates in various specifications, characterized by uniform particle shape and rational gradation; this fully satisfies the demand for sand and gravel materials across a wide range of applications, including local road infrastructure, general construction, and concrete production. The complete set of granite crushing & screening equipment is highly automated and has strong operational stability. At the same time, it takes into account the convenience of operation and maintenance and energy consumption control, creating good economic benefits for customers.
250 TPH Granite Crushing & Screening Plant
After the raw ore is fed into the feed hopper, it undergoes pretreatment by a vibrating grizzly feeder with a bar spacing of 120 mm. Material smaller than 120 mm is directly screened out and directed to the first stage of pre-screening, while material larger than 120 mm is fed into a jaw crusher for coarse crushing.
Following coarse crushing by a jaw crusher, the material is fed into a vibrating screen equipped with 20mm and 40mm mesh screens, yielding two material fractions: 0–20mm and 20–120mm. Material meeting the required particle size specifications is conveyed to a storage bin for temporary holding, from where it is uniformly fed to the subsequent processing stage via a vibrating feeder.
The material fed by the feeder first passes through an iron remover to remove iron impurities and avoid damage to subsequent equipment. Subsequently, it proceeds through two cone crushers in succession for intermediate and fine crushing—a process tailored to the high hardness of granite—ensuring a uniform particle shape.
Material that has undergone intermediate and fine crushing is fed into a vibrating screen equipped with 25mm and 35mm mesh screens. The 25–35mm fraction is transported to a designated area via conveyor belt. Material larger than 35mm is returned to the cone crusher for further reduction. Material smaller than 25mm is directed to the next screening stage—a vibrating screen fitted with 7mm and 12mm mesh screens—yielding three final aggregate product sizes: 0–7mm, 7–12mm, and 12–25mm. All finished products are transported via conveyor belts to their respective stockpiles.
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