Key Factors Affecting Briquetting Density
1. Basic Influence of Material Characteristics
- Material purity: Higher purity with fewer impurities creates more space between particles, making it easier to achieve required density
- Inert impurities: Large amounts create gaps that hinder tight particle adhesion, leading to decreased density
- Moisture content: Must be controlled within suitable range - excessive moisture creates moisture barriers, insufficient moisture lacks necessary binding medium
- Particle shape: Regular and uniform particles fill each other better during extrusion, forming dense structure; irregular particles tend to retain gaps
2. The Core Role of Pressure Parameters
- Sufficient pressure: Must allow material particles to overcome gap limits and achieve tight molecular bonding
- Insufficient pressure: Results in only surface contact between particles with many internal voids and low density
- Excessive pressure: May damage material structure, negatively impacting densification effect
- Pressure duration: Must match material forming rhythm to ensure sufficient time for particle recombination and agglomeration
3. Mold Structure Auxiliary Control
- Cavity shape: Must conform to material flow characteristics to ensure uniform pressure transmission
- Wall smoothness: Excessive roughness leads to material adhesion; excessively smooth walls may reduce inter-particle friction
- Structure design: Guides material to fill fully, reducing internal porosity and increasing overall density
- Force distribution: Avoids localized low-density areas caused by insufficient force
4. Process Control Optimization Guarantee
- Pretreatment: Ensures uniform material crushing and thorough impurity removal
- Conveying speed: Must maintain uniform and stable speed to avoid fluctuations in mold filling
- Cooling control: Cooling rate must be controlled to prevent internal cracks from thermal expansion/contraction
- Quality assurance: Ensures dense and stable briquetting structure while maintaining target density level
