Investigation of wood ash melting by AC plasma torch

Abstract

Abstract One of the methods for processing ash from waste incineration can be plasma treatment. In most cases, studies are carried out with inert gas systems. The size of the processed pieces of sintered ash is 10-50 mm. The power of the plasma torch is 75 kW at an air flow rate of 8.8 g/s. Temperature control on the ash surface is carried out using a two-beam pyrometer. The total melting time is 7 hours. The temperature of the least heated part of the melt is 1300°C. Liquid slag is cooled in a large number of cold water. Upon contact of the hot molten slag with water, glass-like pieces 2-3 mm in size are formed. The composition and properties of the slag are studied using a scanning electron microscope with an attachment for elemental analysis and an X-ray diffractometer.