Design and construction of an electrical furnace chamber based on RERIH system for high temperature

Abstract

One of the important parts of an electric furnace is the combustion chamber which is used to heat or melt materials. The chamber system which is based on the refractory, element, Rockwool, insulator, and Hebel (RERIH) has been successfully designed to reach high temperatures up to 1200°C. The refractory layer is designed from a mixture of trimortar cement and water. To obtain one side of the refractory, the composition of trimortar cement used is 2 kg mixed with 1 liter of water. The number of refractory sides needed for the electric furnace chamber is six sides, each of which is placed on the front, back, top, bottom, left side, and right side. To retain heat in the chamber, the refractory is covered with heat-resistant ceramic fibers (Rockwool). The Rockwool used has a density of 160 Kg / m3 and a thermal conductivity of 0.23 W / m.K. The maximum temperature that this Rockwool can withstand is 1260°C. The third layer as a heat barrier in the chamber is an insulator, which is a lightweight brick block made of a mixture of alumina. This refractory thermal insulation brick contains more than 48% alumina oxide so it has lower thermal conductivity and better heat insulation qualities. Meanwhile, the last layer is the placement of Hebel or light cement blocks made from lime which is usually used for building walls. This Hebel has dimensions (w x w x h) of 600 x 200 x 100 mm3.