Sustainable Mining and Metallurgy

Two on-line oxygen concentration analyzers were installed respectively at the waste heat boiler outlet and the electrostatic precipitator (ESP) outlet of a company s smelting dust collection system. In this paper, the influence of oxygen concentration on the sulfur content in the white dust collected by the ESP, the dust discharge and electric field operation of the ESP, the efficiency of arsenic recoverer and the amount of waste acid resulting from non-ferrous smelting were analyzed; the application of oxygen concentration analyzers was introduced. Production practice shows that the grayness of white dust and detected oxygen concentration data can be based on to realize accurate adjustment of process parameters, guarantee a stable sulfur content in the white dust collected by the ESP, and control the ESP voltage within an optimal range. As a result, the dust collection efficiency is improved significantly, the purity of the dust collected in downstream arsenic recovery process is increased efficiently, and waste acid amount from the acid-making system and waste acid treatment cost are reduced.