Facts & Figures Book - KPI-JCI

Washin g/Classifyin gKPI-JCI and Astec Mobile Screens’ log washer designimproves on the traditional design in that the paddlesare set in a spiral pattern around the shaft instead of ina straight line as in competitive units. This design featureprovides many benefits, including: 1) Reduces intermittentshock loading of the log, 2) Keeps a portion of themass in motion at all times, thus reducing power peaksand valleys as well as overall power requirements,3) Reduces wear and 4) Provides more effective scrubbing.Other important features of the log washer includetwo large tank drain/clean-out ports, rising current inlet,overflow ports on each side of the unit, cast ni-hard paddleswith corrugated faces, readily-available externallymounted lower end bearings and a custom-designed andmanufactured single-input dual-output gear reducer.Application: The majority of the scrubbing actionperformed by the log washer is accomplished by theabrading action of one stone particle on another, not bythe action of the paddles on the material. Due to thisand other feed material characteristics such as clay solubility,the capacity of a log washer is given in a fairlywide range. Normal practice is to follow the log washerwith a screening device on which spray bars are used toremove fines and clay coatings on the stone.LOG WASHERSWater Maximum Approx. Approx.Capacity Motor Req’d. Feed Size Dead Load Live LoadModel (TPH) (HP) (GPM) (in.) (lbs.) (lbs.)8024-18 25-80 40 25-250 3” 12,500 15,0008036-30 85-200 100 50-500 4” 34,000 45,0008048-30 125-300 150 100-800 5” 47,500 70,0008048-35 125-400 200 100-800 5” 53,000 83,000102