📋 Case Study

Limestone Mine Crushability-Grade Correlation System

Variable hardness causing crusher wear spikes and inconsistent product size distribution

🏗️ Project Overview

European high-purity limestone quarry supplying cement and steel industries

🎯 Challenge

Variable hardness causing crusher wear spikes and inconsistent product size distribution

🔧 Design Approach

Drill-core point-load testing + portable NIR spectroscopy linked to real-time crusher power draw analytics

📐 Key Calculations

Crushability Index

PLI × 100 / (NIR CaCO₃ %)

Result: 14.2

Predicts specific energy requirement

📊 Results

Crusher liner life extended 37%; PSD standard deviation reduced by 41%

💡 Lessons Learned

• •NIR calibration must be updated per geological facies
• •Power draw baselines require seasonal thermal correction

✅ Key Takeaways

• 1NIR calibration must be updated per geological facies
• 2Power draw baselines require seasonal thermal correction