Sand coolers are as important as sand mixers in green sand preparation systems. Sand coolers pre conditions the green sand and enables controlling of the moisture which increases defect rates in green sand foundries. Installing sand coolers in green sand preparation systems significantly decrease the defect rates of the foundries.
when the start of the cooling system, the control system first detects the temperature and moisture of the return sand and accordingly determine the amount of water; the return sand get into the cooler, in a blender and blowing unit , the return sand is moving in the horizontal and vertical direction of “∞”-shaped three-dimensional. At the same time, Water adding system will determine the amount of water evenly and spray the water into the return sand, The water evaporation will take away a lot of heat, Hot water vapor was quickly drawn into the dust collector system from the upper of the cooler , Temperature and moisture sensors continuously monitors the temperature and moisture changing of the return sand . Moreover based on the sensors monitoring motor load, the control system adjusts the discharge door opening to maintain a constant volume of sand in the cooler at all times.By detecting the outlet sand temperature and moisture, feedback water control system, adjusting the quantity of water, ensure the return with sand high-efficiency cooling.
