Blaine = 403.778 - 8.399·Residue
Residue = 19.861 - 0.2198·rpm_lag2 + 0.0437·feed_lag1
Residue = 20.654 - 0.2280·rpm_lag2 + 0.0341·feed_lag1 + 0.0127·return_lag0
Residue = 34.888 - 0.3567·rpm_lag2
Residue = -2.040 + 0.0941·feed_lag1
ΔBlaine ≈ (-0.421) per 1 t/h Return (via Residue)