AbstractA modified cyclone washer was designed, fabricated, and its collection efficiency evaluated. This equipment consists of an American‐type cyclone separator with a triple cone and a spray nozzle was introduced into its cylindrical body. The study consisted of an experimental evaluation of the operating conditions at ambient and higher than ambient temperatures, varying chimney height and water flow rate, with the purpose of humidifying the dust. The collection efficiency of the cyclone washer was evaluated particles of micronized quartz with an average diameter of 7.48 μm and a density of 2.650 g/cm3. The amount of particles varied from 20–100 mg/m3 of air. An average efficiency of 97.07 ± 1.03 % was obtained with four spray nozzles, a chimney height of 0.645 m and 0.358 m3/s of gas.