Methods are proposed for intensifying mass transfer in blow of steel in a ladle using acoustic vibrations. Industrial tests of blowing metal in a ladle using a lance and imposition of acoustic vibrations generated by an external acoustic radiator are described. An acoustic blow plug (ABP) containing a resonator of jet-acoustic vibrations is proposed for argon blow of steel in the ladle. Model studies and theoretical estimates of factors that contribute to intensification of mixing and decrease in the blow plug erosion are described. The results of industrial testing of blowing steel in a furnace-ladle plant using the ABP at the Severskii Pipe Works are presented.

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Results for a pilot batch of quartz protecting tubes for steel teeming fabricated by a ceramic castable technology and tested at the Novolipetsk Iron and Steel Works (NLISW) are reported. The average durability of tubes tested was shown to be 5.2 heats (maximum 9), which is 15% higher than that of corundum-graphite protecting tubes available from the Vesuvius JSC. The cost of corundum-graphite tube is 5 times the cost of quartz tubes.Over the past 15 -20 years, leading specialists in the metallurgical industry have been voicing the opinion that production and uses of steel ladle refractories based on fused quartz (quartz ceramics [1]) have little (if any) prospects for further development. However, contrary to this pessimistic view, production of submersible nozzles and heat-protecting tubes made of these materials was constantly on the rise over that period despite the decline in the steel-making industry.

Technical and economic indices are presented for OAO Dinur operation in 2005 -2007. The most promising developments and test results are covered in the field of trough low-cement and ultralow-cement corundum mixes, mullite-corundum refractories, corundum-graphite objects, sets of ladle refractories for furnace-ladle units (FLU) based on high-alumina and periclase-carbon-containing objects. Refractory grades MLP and MKP-72 based on andalusite for lining anode firing furnaces are presented as an advanced development.The contemporary state of the Russian refractory industry, its production capacity, the level of technology and product quality make it possible to satisfy successfully the needs of domestic metallurgy, to resolve new tasks, and to introduce new high-quality technology rapidly. Enormous experience has been obtained of work under market conditions: at first there was a drop in production, then recovery, renewal and improvement of production units and products under stringent competition with overseas enterprises, i.e. refractory producers.OAO Pervoural'sk Dinas Plant is one of the Russian Federation industrial enterprises specializing in producing refractories and refractory materials for the glass industry, metallurgical production, and embracing within its range, coke by-product, blast furnace, rolling, steel-pouring and agglomerated lime production. The enterprise has experience and production resources for the building industry, it is prepared to present to the market results of development of modern technology in the field of refractories for nonferrous metal producers and the cement industry.The level of technological development and engineering equipment of OAO Pervoural'sk Dinas Plant makes it possible to provide customers with high quality products competitive with respect to the well-known refractory producers of Europe, China and Japan (RHI, Vesuvius, RI, Mayerton, Dalmond, Choe Sun, Duferco, Shinagava, TUK), and also in the RF (OAO Bogdanov Refractories, Borovich Refractory Combine, OAO Semiluk Refractory Plant, OAO Snegirev Refractory Plant, OAO Kombinat Magnezit, OOO Nikomogneupor). The main customers of OAO Pervoural'sk Dinas Plant are all the large metallurgical enterprises of the Russian Federation and a number of enterprises abroad (Ukraine, Kazakhstan, Uzbekistan, Poland, Egypt).OAO Pervoural'sk Dinas Plant is dynamically developing production, specified by an increase in the volume of product and the main financial indices since 2005, and the plant may be characterized as a flexibly transforming enterprise with changes in the competitive market with a capacity to complete its orders under different market conditions. By predicting even in 2005 a sharp reduction in orders of dinas refractories, collectives of the enterprise set up new forms of products that made it possible to increase the number of orders for ladle carbon-containing and high-alumina refractories, to obtain orders for corundum-graphite objects for steel pouring, high-alumina refractories for blast furnace operation and...

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