In domestic steelmaking monolithic steel teeming ladle linings based on silica-containing raw materials have found wide use [1][2][3].At Nizhnii Tagil Metallurgical Combine a monolithic steel teeming ladle lining is prepared by pouring of quick-hardening concrete mixtures. Type ZKM-97 ground quartzite to Tu 14-8-92-74 produced by Pervoural'sk Dinas Plant is used as the refractory filler.In 1987, the average life of monolithic linings was 11.8 heats in No. 1 Open Hearth Shop and 12.5 heats in No. 2 Open Hearth Shop, which did not satisfy the increasing requirements of ladle metallurgy and did nto provie stable operation of the teeming areas.For the purpose of increasing ladle lining life the Eastern Institute of Refractories, together with Nizhnii Tagil Metallurgical Combine and Pervoural'sk Dines Plant has done work on det4ermination of a rational grain-size distribution of the quartzite filler, development of a method of production of it, and introduction of it into steel production.A lot of quartzite with physicochemical properties and grain sizes meeting the requirements of GOST 9854-81 for type K-98-45 was ground on different equipment used in Pervoural'sk Dinas Plant for production of quartzite filler. Samples of quartzite after grinding in grinding, ball, and rod mills were sifted into 3-2, 2-i, 1-0.5, 0.5-0.09, and finer than 0.09 mm fractions.A petrographic investigation was made of the samples of ground quartzite by fractions by the method of area statistical calculation of the grains having a different form. In each
Under the microscope a specimen of combined antioxidant heated at 1400~ exhibited finely dispersed muilite and colorless glass phase with RI = 1.505 • 0.003, and also corundum and silicon. On the x-ray patterns, in addition to lines for these phases, we noted lines confirming the presence of small amounts of =-cristobalite. The absorption bands typical of corundum and mullite at 422, 450, 600, 640 cm -I were noted in the IR-spectra.These results indicate that it is possible to use combined antioxidant of the proposed composition in graphite bodies, including those based on periclase.
LITERATURE CITEDi.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.