Using acoustic field energy to decrease dust discharge from the working space of the Vanyukov furnace

Abstract

To organize in-furnace dust settling in the Vanyukov furnace at OAO SUMZ (Revda, Russia), acoustic emitter technology is used. The emitter design includes a nozzle tube, an air nozzle, a resonator, and a focusing surface. Starting from the surface area of the furnace melt bath and recommended specific acoustic power for in-furnace dust settling, the summary acoustic field sound power is calculated and the optimal amount and arrangement places of acoustic emitters are determined. To form the acoustic field in the Vanyukov furnace for melting copper sulfide zinc-containing feedstock and deplete liquid converter slags, four acoustic emitters are mounted in the end wall through an inspection window, two on the apothecary side and two on the loading side of charge materials. In general, six pilot modes of testing the in-furnace dust settling system with various operational settings of acoustic emitters and one base mode for comparing performance characteristics are implemented. The duration of pilot periods varies from 5 to 18 days, and the total aggregate service time is 68 days. The presence of the acoustic field in the working furnace space at any emitter operation settings promote a decrease in the concentration of dust particles after the chain of gas purifiers (in the commodity point). It is revealed by the experimental data that the minimal summary acoustic field sound power, which decreases the dust concentration due to the coagulation of dust particles inside the furnace space, is 800 W.