ACOUSTIC FIELD ENERGY UTILIZATION FOR LOWERING DUST REMOVAL FROM THE VANYUKOV FURNACE

The acoustic generator technology was used to arrange in-furnace dust deposition in the Vanyukov furnace, OJSC SUMZ (Revda, Russia). The generator design included a nozzle tube, an air nozzle, a resonator and a focusing surface. The total acoustic power of the acoustic field and the optimum number and location of the acoustic generators were determined based on the surface area of the furnace molten pool and the recommended values of specific acoustic power for in-furnace dust deposition. To create an acoustic field in the Vanyukov’s furnace for melting the sulfide copper zinc-containing raw material and depleting the liquid converter slag, four acoustic generators were installed in the end wall through the inspection window: two on the uptake side and two on the charge material loading side. In total, six pilot modes of in-furnace dust deposition system testing at different operation settings of acoustic generators were implemented with one basic mode to compare performance. The duration of test periods ranged from 5 to 18 days, and the total operation time of the unit using acoustic generators was 68 days. It should be noted that the presence of an acoustic field in the furnace body at any operation settings of generators in one way or another helped to reduce the concentration of dust particles downstream the chain of gas purifiers (at the commodity point). According to test data, it was found that the minimum total acoustic power of the acoustic field, which reduces the dust concentration due to the coagulation of dust particles within the furnace space, is 800 W.

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