Deformation factors of asbestos thermosilicate in the ring cap of the mixer of an induction furnace

Abstract

'fqne cap in the IAKM-40 mixer consists of a ring with an external diameter of 170 mm, internal 70 mm, and thickness 50 mm.It is made from asbothermosilicate [I] by pressing into a ring mold in the axial direction.Asbothermosilicate consists of 45% asbestos, 30% diatomite, and 25% lime.Using a cutter the laboratories of the Krasnoyar Metallurgical Factory cut three batches of specimens in the form of prisms (base 20 x 20 mm, height 40 mm) in three directions over the ring cap -axial, tangential and radial.At room temperature we obtained the followingcompressive strength in the cut specimens: Obz -axial, 8 N/mm2; Obr radial, 7 N/mm ;and G~_ tangential, 8 N/mm 2. After three heat cycles, the compressive strengths were 8, u~ 6.3, and 5.5 N/mm 2 respectively.Taking into account the method of preparing the ring cap of the mixer it is possible to make the following statement:asbestos thermosilicate possesses orthogonai anisotropy with three mutually perpendicular planes of structural symmetry.The deformation of the orthotropi c body is characterized by nine independent constants of elasticity in the main directions.They should be determined [2] by measuring the deformation in specimens over the three main directions (along the axis of the ring checker, and across it in the tangential and radial directions).During the investigation on each specimen we determined the elasticity modulus along the axis and two coefficients of transverse deformation.After testing three batches of specimens we obtained nine elasticity constants: E a = E3, E t = El, E r = E2 -the moduli under compression, respectively along the axes of the cap of the mixer and transversely in the tangential and radial directions:Vta------'Vl3 ~ Vat=V3h