Pit & Quarry, November 2016
WASHING CLASSIFYING x 3 in x 20 in high head slurry pump was presented as a solution According to Schurco H Series filter press feed pumps deliver higher pressures because of a unique impeller geometry The H Series impellers have very large outside diameters relative to their suction and discharge sizes This translates into higher pressures at lower speeds says Will Pierce Schurcos vice president of engineering The pumps turn slower to achieve the duty point reducing particle velocities and wear rates Pierce adds Speed kills in slurry pumps he says KEY FEATURES Another feature of the H Series pumps are low flow gland seals Filter presses are dewatering equipment by design Pierce says But shaft seals in slurry pumps typically require injection of a significant amount of freshwater to adequately seal the pump Schurcos low flow gland seal reduces the amount of water required to seal the pump and eliminates the need for mechanical seals According to Pierce this feature increases the mean time between failure on the pump seals Short Mountains pump might start off at 200 gallons per minute OBrien says After the flow rate into that press goes down to a predetermined point maybe 25 gallons per minute that press fills up and continuously decays the volume pumped in When that pump quits pumping the press starts to open one plate at a time dumping the mud that was dewatered Such an application puts high demands on a pump OBrien adds When it starts pumping mud into the cavity its high volume and low pressure he says During the cycle it becomes low volume high pressure up to 185 lbs of pressure Thats very aggressive The pump and the system as a whole have surpassed Smiths expectations Weve been really impressed he says The fines recovery system has operated really well Weve been efficient and experienced very little downtime in the plant We can use their pumps in every part of the system One improvement Short Mountain has experienced with the new pump is parts availability Because the operation previously used an overseas made pump parts werent readily available Schurcos location in Jacksonville Fla provides faster parts solutions Smith says 32 PIT QUARRY November 2016 pitandquarry com
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