ELDFAST TIXOTROPISK VIBRATIONSMASSA OCH FOERFARANDE FOER VIBRATIONSFODRING AV METALLURGISKA KAERL MEDELST DENNA MASSA.

摘要

1. A refractory thixotropic self-hardening vibration compound on a magnesite base to produce a vibration density of at least 3.0 g/cm**3 , characterized by the following chemical composition (in % by weight) : 0.1 to 2.0% SiO2 0.1 to 30% Al2 O3 0.5 to 3.0% P2 O5 0.2 to 1.5% K2 O plus Na2 O plus LiO2 0.1 to 2.0% Fe2 O3 0.1 to 0.5% B2 O3 0.1 to 3.0% CaO residue MgO and the following crystallographic analysis (in % by weight) : 0 to 30% corundum 0.1 to 0.5% boric acid 0.5 to 4% alkali polyphosphates residue sintered magnesite and the following grain fraction of the vibration compound : 10 to 50% < 0.06 mm 5 to 20% 0.06 to 0.5 mm 30 to 85% as residue : 0.5 to 2 mm for the lining of metallurgical vessels, more particularly steelworks ladles, the spinel-forming vibration compound of sintered magnesite and corundum counteracting shrinkage and crack formation by its growth during heating (by the introduced melt).