Corundum-periclase-carbon refractories for lining steel-pouring ladles

Results are provided for a study of the operating conditions of the refractory lining of steel-pouring ladles of OAO Nizhnetagil Metallurgical Combine, that are subject to the corrosive physicochemical action of slag and metal during steel smelting from vanadium-containing raw material. Manufacturing technology is proposed for corundum-periclase-carbon objects with improved quality indices, high resistance and reliability.     

Mechanized guniting of the lining of steelcasting ladles

Conclusions A method has been developed and equipment constructed for guniting steelcasting ladles without any manual labor. Experiments and tests were carried out with compositions based on quartzite, Chasov-Yar semiloamy sand, and fine-ground chamotte. The industrial-scale guniting tests showed that the durability of the lining of 130-ton steelcasting ladles increases by 30% (4.7 melts) on average with one guniting per ladle campaign.Translated from Ogneupory, No. 5, pp. 32–36, May, 1977.     

Gas-flame guniting of the lining of intermediate continuous steel-casting ladles

Conclusions As a result of laboratory investigations and rig testing of the flame guniting of intermediate ladles for continuous steel-casting plant we recommend the following bodies: 90% corundum, 10% sodium tripolyphosphate; 80–90% corundum, 20–10% chamotte; 80–90% high-alumina chamotte, 20–10% chamotte. The particle size of the corundum body is <0.088 mm, high-alumina <0.25 mm.The optimum guniting cycle is: consumption of natural gas 60 m³/h, oxygen 100 m³/h, gunite body 150–200 kg/h, guniting distance 450–550 mm, rate of moving the burner 1.0 m/min.In the case of chamotte, the coefficient of gunite body utilization equals 0.75, for high-alumina 0.70, and for corundum 0.40, with an open porosity in the gunite coating of 10–15, 8–10,and 4–6%, respectively.Using the experimental equipment the body made from 90% corundum and 10% sodium tripolyphosphate was used to gunite the side surface of the lining of an intermediate ladle. The wear of the gunite section of the lining was 1.3–2.5 mm per heat.Translated from Ogneupory, No. 4, pp. 37–42, April, 1973.     

Masses based on Arkalyk clay for guniting steel-teeming ladles

Conclusions The authors investigate the properties of gunite masses based on Arkalyk clays with regard to service conditions in steel-teeming ladles used in open-hearth manufacture of steel. The optimal composition of the mass is as follows: 90% chamotte, 10% clay, and 10% binder (above 100%). Industrial tests have been performed on a mass for guniting 230-ton steel-teeming ladles of the MMC. The durability of a gunite layer 30–35 mm thick is about 6 pourings. The results confirm that Arkalyk clay is a promising material for making gunite masses.Translated from Ogneupory, No. 6, pp. 30–35, June, 1981.     

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.     

Taking into consideration the polydispersion of guniting powder in calculation of a guniting flame

Conclusions The principle of division of polydispersed fuel into monodispersed fractions taking into consideration the determining property of the fuel particles is presented.By calculation of three- and four-fraction guniting flames it was established that the polydispersed guniting powder must be divided into not less than four fractions.Translated from Ogneupory, No. 7, pp. 41–44, July, 1986.     

Determination of the technological parameters of guniting

Conclusions The optimum guniting parameters with which it is possible to obtain strong and dense coatings with the minimum losses of compound with the springback were determined by multiple correlation analysis. The use of a regression equation makes it possible to calculate the guniting parameters for the production of coatings with previously specified properties.Translated from Ogneupory, No. 4, pp. 37–40, April, 1984.