Facts & Figures Book - KPI-JCI

CAPACITY MULTIPLIERS FOR OPEN CIRCUITTWIN FEED VS. SINGLE FEEDTRIPLE ROLLSTriple roll twin feed capacities are obtained by selecting a multiplierfrom the chart (depending on coarse/fine feed ratio) and applying thesame to the single feed triple roll capacity. Roll crusher capacities atgiven settings will vary depending on horsepower available, slippageof feed on shells in crushing chamber, type of shells, and size of feed.Based on a reduction ratio of 2 to 1 in each stage.Feed Split Ratio Capacity Through Capacity That isCoarse/Fine Crusher Product Size20/80 .83 .7330/70 .97 .7740/60 1.13 .8550/50 1.35 .9560/40 1.66 1.1267/33 2.00 1.3070/30 1.95 1.2480/20 1.75 1.0490/10 1.55 .82Crushin g1⁄2”(12.7 mm)EXAMPLE: (4030 Triple Roll)1”(25.4 mm)(1) Single feed capacity for 1 ⁄2”—(12.7 mm—) Product = 159 TPH(144 t/h).(2) Twin feed capacity with “feed split ratio coarse/fine” 67/33 is159 x 2 = 318 TPH (144 x 2 = 288 mt/h).(3) Single feed open circuit product 159 x .85 = 135 TPH(144 x .85 = 122 mt/h).(4) Twin feed open circuit product is 159 x .85 x 1.3 = 175 TPH(144 x .85 x 1.3 = 159 mt/h).71