Reducing Dust Emission During the Sintering of Iron Ores by Using the Energy of an Acoustic Field

Abstract

One of the main sources of dust-bearing emissions in the metallurgical industry is the sintering machine. An acoustic field was formed during the initial stage of heat treatment of a sintering-machine charge by using an acoustic radiator in the form of a Hartmann whistle installed in the vacuum chambers of the machine. The acoustic field covers 15–20% of the sintering area and has an acoustic power of 1.0–1.2 kW/m2. Use of the field has increased the productivity of the sintering machine 3.2–8.3%, reduced the amount of carbon monoxide formed by 26.7–33.4%, and reduced the entrainment of dust by the gas by 29.2–36.2%. When an acoustic field with a power of 0.3–0.4 W/m3 is created inside the flue-gas collection main, dust emissions can be cut by at least 20–25% of the original value.