Screen Efficiency क्या होती है?

Screening process में Screen Efficiency यह बताती है कि screen कितना effective है desired particle size को अलग करने में। यह एक important parameter है जिससे हम screening unit की performance judge करते हैं।

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🔹 Definition:

Screen efficiency वह प्रतिशत है जो यह दर्शाता है कि screen ने सही तरीके से undersize और oversize particles को classify किया है।

Formula (Basic):

Screen Efficiency (η) = (Mass of material correctly classified / Total mass of feed) × 100

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🔹 Detailed Efficiency Formula (Material Balance Approach)

Symbol	Meaning
F	Feed rate
D	Discharge (oversize)
U	Undersize stream
f	Fraction of fines in feed
d	Fraction of fines in oversize
u	Fraction of fines in undersize

Screening Efficiency η = [(f - d) / (u - d)] × 100

• f = fraction of fines in feed
• d = fraction of fines in overflow (undesired fines)
• u = fraction of fines in undersize (desired fines)

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🔹 Types of Efficiency

• Overall Efficiency: पूरा screening process का performance
• Partition Efficiency: Specific size range की separation capability
• Mechanical Efficiency: Equipment की design और working condition पर आधारित

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🔹 Factors Affecting Screen Efficiency

• 🔸 Particle size distribution
• 🔸 Moisture content of material
• 🔸 Screen mesh size और shape
• 🔸 Vibrating frequency और amplitude
• 🔸 Screen inclination angle
• 🔸 Feed rate और uniformity

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🔹 Screen Efficiency Improve कैसे करें?

• Proper feed control
• Multi-deck screening system
• Mesh cleaning devices (ball decks, air jets)
• Right screen angle और vibration setting

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🔹 निष्कर्ष (Conclusion)

Screen efficiency किसी भी screening operation का core performance indicator होता है। Higher efficiency का मतलब है better separation और process control। Industrial screening systems में इसे maintain करना production quality के लिए critical होता है।