This article addresses the critical issue of a Raymond mill’s motor failing to start, which halts production. It outlines the primary causes for this problem, including power issues, low overcurrent relay settings, excessive motor load, and incorrect wiring. The article then provides practical solutions for each cause, such as checking and repairing electrical components, adjusting relay settings, reducing the motor load, and correcting wiring errors. Understanding and addressing these issues is crucial for maintaining uninterrupted operation and optimal performance of the Raymond mill.

This article explores the crucial material requirements and their impact on vibrating screen performance. Key factors include moisture content, where external moisture affects flowability and can lead to clogging, especially in fine-pore screens. Clay content is another critical aspect, as materials prone to agglomeration, like clay, can cause screen clogging even with low moisture levels. Particle size characteristics, particularly the distribution of particle grades, influence screening efficiency, with pre-screening methods improving performance when fine particle content is low. Finally, density characteristics of the material, where differences in density between coarse and fine particles affect screening ease, are discussed. Understanding these material properties is essential for optimizing vibrating screen operation and achieving efficient separation results.

This article discusses various types of crushers used in mining machinery, each with unique working principles and applications. The jaw crusher, with its fixed and movable jaw plates, is suitable for breaking large ore or rock into smaller particles and is widely used in mining and construction. The cone crusher uses an eccentric motion to crush materials between two cones. The hammer crusher employs high-speed hammers for impact crushing, while the impact crusher uses rigid plate hammers for breaking materials. The vertical shaft impact crusher, also known as a sand making machine, features a high-speed rotating impeller for producing construction-grade sand. Lastly, the roller crusher uses two rotating rollers to compress and crush materials. These crushers are essential for processing various types and hardnesses of ore and rock in the mining and construction industries.

The impact crusher is favored in the mining industry for its efficiency and versatility. It excels in handling moist materials without clogging, a common issue with hammer crushers that require a bottom screen. The impact crusher's design, featuring a heating device on the impact plate, prevents material adhesion. It also offers a wider range of discharge adjustment. Furthermore, the impact crusher experiences less wear and has a higher metal utilization rate compared to hammer crushers, which wear on multiple sides and have a lower utilization rate. These factors contribute to the impact crusher's popularity and cost-effectiveness.

The jaw crusher, also known as the jaw break, is a vital piece of crushing equipment that requires regular maintenance to operate efficiently and prolong its service life. Key maintenance tasks include daily inspections of components such as the motor, wiring, belts, and wear parts; proper lubrication of moving parts using appropriate grease; periodic adjustments to maintain optimal discharge size; and timely repairs when issues arise. Consistent upkeep ensures the jaw crusher maintains high performance, reduces downtime, and delivers long-term reliability.