نشریه ریخته گری
پیاپی 128 (زمستان 1400)

Rubber recycling methods are divided into two branches, mechanical and chemical. In the mechanical method, tires are divided into smaller pieces. This is done in several stages by shredders and mills. Each step of this method produces different products that are used in different industries. Some industries use coarse granules and others require very soft rubber powder. In the chemical method, either the tire is burned and the remaining coal and metal wires are used or the tire is pyrolyzed. In the pyrolysis method, the tire is burned in vacuum. In this method, products such as fuel (fuel such as diesel), oil, etc. are extracted. Recently, tires have been used as a source of heat and carbon in the smelting of steel and cast iron. This method has been used successfully in electric arc furnaces for melting steel. The aim of this study was to investigate the possibility of carbon adsorption of worn tires to the molten cast iron in induction furnaces and the effect of adding carbon through worn tires on the microscopic properties and structure of cast irons. In the first stage of the research, the desired tire weight was determined by performing calculations. The amount of molten carbon was measured without adding rubber, then the tires were added in different weights and the percentage of carbon obtained was obtained and the amount of carbon adsorption was measured. Then the desired samples were cast and the percentage of carbon in the samples was determined. The results show that the percentage of carbon uptake was was very low and the spilled samples were full of cavities and porosity. Burning rubber and producing a large amount of gas pollutes the workshop environment and spills melt out of the pan. The main conclusion is that this method can not be used to increase carbon in induction furnaces.