Oxide-carbon refractories produced by OOO Gruppa Magnezit in lining steel-pouring ladles

The activity of OOO Gruppa Magnezit is described, concerning production of oxide-carbon refractories, and methods of preparing refractory linings from them for steel-pouring ladles with the aim of obtaining the minimum specific consumption of refractory materials and achieving a prescribed life.     

Refractory materials and methods for increasing the life of converter linings from experience of OOO Gruppa Magnezit

Experience of using OOO Gruppa Magnezit refractory materials in the lining of acid converters in Russia and the Ukraine is summarized briefly. Information is provided on the basis of results obtained in different metallurgical enterprises about the practice of using a set of measures promoting an increase in the operating life of converter linings. __________ Translated from Novye Ogneupory, No. 1, pp. 5–9, January 2008.     

New forms of unmolded refractory materials produced by OOO Keralit

New forms of refractory materials are presented, produced by OOO Keralit: heat-insulating concretes, refractory concretes with low and normal cement contents, torcrete-mixes for heating furnace walls, and magnesia torcrete-mixes for hot repair of arc furnaces. Properties and fields of application for unmolded materials are provided. Translated from Novye Ogneupory, No. 7, pp. 21–23, July 2008.     

Kyanite compounds for guncreting the linings of steel ladles

Conclusions A study was made of the properties of guncrete compounds based on kyanite suitable for service in steel ladles. The best properties were possessed by a compound containing 80% kyanite, 10% clay, and 10% binder.Industrial trials with the guncrete compounds were completed. The life of the new compounds is 20% longer than that of similar compounds based on Novoselitsk kaolin.Translated from Ogneupory, No. 8, pp. 25–29, August, 1981.     

Standardization of the refractory products for the slide gates of steelcasting ladles

Conclusions New technical specifications, viz., TU 14-8-185-75 and TU 14-8-213-76, for the refractory products for the slide gates of steelcasting ladles have been prepared and put into effect.The standardization of the types, dimensions, and technical specifications of the refractory products for slide gates will help to improve the quality of the products and accelerate the changeover to an advanced method of steelcasting.Translated from Ogneupory, No. 7, pp. 46–50, July, 1978.     

Diamond-wheel grinding of the refractory products for the slide gates of ladles

Conclusions A technology was developed and introduced for grinding and boring the refractory periclase plates for the slide gates of steelcasting ladles with diamond tools.The most suitable tool for grinding the plates is a diamond wheel with M1 bond, a diamond granularity of 160/125, and a diamond concentration of 100%. The drills recommended for boring the plate holes are the SK type annular diamond drills.The most efficient and suitable grinding machine for the plates is the 3D756 type fitted with clamping fixtures. For boring the plate holes the recommended machine is a modified 6A12R column-and-knee type milling machine.Translated from Ogneupory, No. 5, pp. 24–27, May, 1977.     

Steelcasting and intermediate ladles for equipment for the continuous casting of steel

Conclusions The life of linings in large ladles depends on the grade of steel, the amount, chemical composition and consistency of the slag.The intermediate ladle made in the factory ensures reliable operation during the casting of metal by the continuous steel casting operation.Heating the intermediate ladle to 1100–1200°C by means of compact burners, working on coke gas, and new designs for cooled stoppers and stopper devices greatly reduces slab loss.In the process of evaluating the casting of transformer steel the loss due to nonmetallic inclusions was greatly reduced, but not completely eliminated.Further work must be done to explain the causes of the formation of slag inclusions and methods of handling the problem.     

Experience of the manufacture and operation of blowing plugs (lances) produced by OOO Keralit

One way of improving metal quality is bottom blowing with inert gas in a steel-pouring ladle through a blowing plug with treatment in a furnace-ladle unit and in an evacuator. Information is provided about experience of producing and operating OOO Keralit blowing plugs (lances).     

铁水罐内衬用喷涂料的试验研究

以特级矾土、刚玉粉、碳化硅、SiO2微粉等为主要原料，复合磷酸盐为结合剂，外加水9％，制成喷涂料，喷涂于铁水罐内村。铁水罐中、下部（铁水区）使用寿命达40d；其上部（结渣区）17d后第一次除渣（传统砖衬3～5d除一次渣），使用寿命30d以上。该材质有效地抵抗了渣、铁水的冲刷与侵蚀。     

Compounds based on novoselitsk kaolin for the gunite linings of steel ladles

Conclusions A study was made of the properties of Gunite compounds based on Novoselitsk kaolin suitable for service in steel ladles. The best composition was: 90% chamotte, 10% kaolin, and 10% (on 100%) bond. A State Standard was developed for Gunite powder. Industrial trials were done on the new compounds. The results of the trials confirmed that it is feasible to use Novoselitsk kaolin for producing Gunite compounds.Translated from Ogneupory, No. 2, pp. 10–13, February, 1979.     

Mullite-corundum ramming compound for the pits of steel casting and donkey ladles

Conclusions A composition consisting of mullite corundum ramming compound MMK-72 was developed for making the bottoms of steel casting and intermediate (donkey) ladles of the converter shop of the Azovstal' factory; it was prepared from high-alumina chamotte and kaolin with a bond of orthophosphoric acid. Using the standard TU 14-297-17-78, the production of the compound is being organized at the Zaporozhe factory. The MMK-72 compound is being introduced in the converter shop of the Azovstal' factory.Translated from Ogneupory, No. 2, pp. 12–13, February, 1981.