‌Process Guarantees for 99.3% Purity of GUIKUANG Raymond Mill Powder‌

The 99.3% purity of GUIKUANG Raymond Mill powder is achieved through comprehensive process refinement. Key technical measures include:

‌1. Raw Material Pretreatment System‌

Dual-channel permanent magnet iron remover eliminates magnetic impurities, reducing metal residue to ≤0.01%.
Vibrating screen achieves 200-mesh pre-classification to remove native impurity particles.
Pneumatic homogenization silo stabilizes material composition fluctuations to <2%, with integrated humidity monitoring and alarm modules. ‌2. Grinding Contamination Control‌ High-chromium alloy grinding rollers (HRC 62-65) reduce metal wear rate to 0.03g/ton. Nitrogen-protected grinding chamber controls oxygen content ≤0.5%, preventing oxidation-induced discoloration. Fully enclosed screw conveyor system eliminates external dust contamination. ‌3. Classification Precision Assurance‌ Turbine classifier with dynamic blade-tip gap compensation ensures particle size accuracy of ±1.5μm. Tungsten carbide coating on classifier rotor reduces fine powder adhesion by 80%. Secondary air classification device intercepts ultrafine agglomerates, achieving coarse particle escape rate <0.1%. ‌4. Intelligent Purity Control‌ Adjustable classifier speed (50-300r/min) optimizes particle distribution. Temperature control module maintains grinding chamber temperature ≤65°C, preventing thermally induced impurities. Airlock discharge system integrated with pulse dust collector reduces cross-contamination rate to <0.02%. ‌Operational Validation‌ After 12 months of continuous operation in Yunnan: Fe₂O₃ content stabilized at 0.12-0.15%, whiteness ≥93.5%. D97 particle size distribution concentration reached 98.4% for 325-mesh products. Compliance with ISO 3262-19:2020 confirmed by SGS testing. Purity stability standard deviation verified at 0.07% in production data. This process ensures industrial-grade precision and meets international standards for high-purity mineral processing.