Phosphorus Ore Grinding Project (12 TPH, 100 Mesh)
Phosphorus ore is a critical non-metallic mineral for the fertilizer industry, as it is the primary raw material for producing phosphate fertilizers, which play a vital role in improving crop yield and soil fertility. This project, located in Hubei Province, China—a major phosphorus ore production base with rich deposits—focuses on processing phosphorus ore into 100-mesh powder with a production capacity of 12 TPH. The powder is used to produce high-quality phosphate fertilizer, supplying local and surrounding agricultural regions to support sustainable agriculture development.
The raw phosphorus ore used in the project has a P₂O₅ content of 30%, which is classified as medium-grade ore, with impurities including SiO₂ (15-20%), Al₂O₃ (3-5%), and Fe₂O₃ (2-3%). The raw ore arrives at the project site as 100-200mm lumps, which undergo a multi-step pretreatment process to remove impurities and improve grinding efficiency. First, the ore is crushed to 50-80mm using a jaw crusher (PE500×750), then sorted manually to remove large rock fragments and debris. A magnetic separator (8000 gauss) is used to remove iron impurities (Fe₂O₃), reducing the iron content to ≤1%, which prevents equipment wear and improves fertilizer quality.
After pretreatment, the phosphorus ore is crushed to 10-15mm using an impact crusher (PC1214), then stored in a 250-ton silo to ensure a continuous feed to the grinding system. The project uses a ball mill (Φ2.4×7m), which is widely used in phosphorus ore grinding due to its high grinding efficiency and ability to handle medium-hard materials. The ball mill is filled with high-chromium steel balls at a 32% filling rate, operating at 20 rpm, creating a cascading motion that grinds the 10-15mm ore particles into fine powder.
Hot air (130-150°C) is blown into the ball mill to dry the ore powder, reducing the moisture content from 6-8% to less than 1%, preventing clumping and ensuring uniform particle size. An air classifier, installed at the mill’s discharge end, separates particles finer than 100 mesh (150 μm) from coarser particles; the coarser particles are recycled back to the ball mill for regrinding, forming a closed-loop system that guarantees consistent fineness and high product quality. The 100-mesh powder is collected by a pulse bag filter with a dust collection efficiency of 99.9%, complying with China’s environmental emission standards.
The project adopts a closed-loop production system to minimize dust and waste: all dust generated during crushing and grinding is captured by the dust collection system, and the waste ore (coarser than 10mm) is repurposed as construction fill, achieving zero waste discharge. The 100-mesh phosphorus ore powder is conveyed to a 400-ton silo, directly supplied to a nearby phosphate fertilizer plant. The powder is used to produce diammonium phosphate (DAP) and triple superphosphate (TSP), which improve crop yield by 15-20% compared to traditional fertilizers. With a total investment of 6.5 million yuan and a payback period of 2.5 years, this project not only meets agricultural demand but also promotes efficient and environmentally friendly phosphorus ore processing.
