Periclase-carbon refractories based on electrofused periclase with an additive of passivated aluminum have been tested in service in the top cone of a 370-ton converter of the Magnitogorsk Metallurgical Works. The lining with experimental refractories withstood 1501 heats whereas the endurance of commercial periclase-carbon refractories of grades PUPK-6 and PUPK-8 equals 1185–1416 heats. It was concluded that the periclase-carbon articles with an aluminum antioxidant have good prospects for lining converters.

The melt-cast MShL refractories of a magnesial spinel composition are characterized by a fine-grain, isometric structure with adequately developed direct contact between the high-refractory phases.

Fused materials in the CaO-MgO system ware obtained by electric-arc firing of dolomite and magnesite. These materials have a dense fine-grain (unoriented) structure with bonds between the periclase and lime grains.

A section has been organized at the Magnezit Plant for the machining and checkout assembly of MKhVP and MKhV refractories for VTS equipment. The section is equipped with a column- and-knee type milling machine, surface grinders, and stands for the checkout assembly of the bottom and roof of the vacuum chamber and the hood cover.

Fusion of a mixture of chemically pure sintered magnesite powder and chromite ore gave a high-density periclase-chromite having a low content of silica, calcium oxide, ferrochrome, and silicates and meeting the requirements for a starting material for refractories and ramming compounds for the chamber lining of steel-vacuuming equipment. Up to 25% of the sintered crust may be used once in the batch provided it contains not more than 2.4% silica.