High-Alumina Mixes Based on Molded Bauxite Suspensions

Refractories and Industrial Ceramics - Results of studying the rheotechnological properties of moldable refractory mixes based on bauxite suspensions plasticized with refractory clay are presented....     

Corundum concretes based on modified phosphate-containing binders

Physicotechnical properties are provided for concretes based on mechanically-activated phosphate suspensions previously modified with magnesium and aluminum hydroxides and silicic acid. The results obtained demonstrate the efficiency of using modifying additions in order to increase the strength and heat resistance of corundum concretes. Translated from Novye Ogneupory, No. 5, pp. 32–35, May 2008.     

Lightweight foam products based on diatomite

Results are presented from selection of the parameters of a diatomite suspension for obtaining foam-diatomite products by HCBS technology. It is established that the use of HCBS technology makes it possible to reduce the moisture content of the diatomite suspension from 63 to 54%. Specimens cast from the suspension are 3 – 4 times stronger than comparable materials of similar density.     

Refractory plastic mixtures based on highly concentrated ceramic binding suspensions (HCBS). 1. Structural and mechanical properties of suspensions (Pastes) of refractory clays

In contrast to the known refractory plastic mixtures that possess certain drawbacks the authors pose the problem of preparing similar mixtures with HCBS under the assumption that by using HCBS of an acid or acid-amphoteric composition plasticized by a refractory clay it is possible to improve the characteristics of this group of unshaped refractories (to reduce the shrinkage due to drying and heat treatment and the porosity and increase the strength). The properties of mixtures based on Nizhne-Uvelskoe clay as a plasticizer of plastic refractory mixtures arc described. Translated from Ogneupory i Tekhnicheskaya Keramika, No. 4, pp. 14–19, April, 2000.     

Aspects of the modification of refractory concrete with nanosilica

Aspects of the modification of refractory concretes with different grades of Ludox nanosilica are discussed. It was established that the addition of nanosilica TMA to the binder in amounts no greater than 25% of the binder’s weight increases the strength of medium-cement concretes and alleviates their softening. The grade of nanosilica that is optimum for super-low-cement concretes is AS-40.     

Predicting the Yield of Coking Products

The properties of coal concentrates are determined: the technical analysis, clinkering properties, petrographic and elementary analysis, and the product yields in coking. Structural characteristics of the coal’s organic mass are also calculated. The results obtained for Kuznetsk Basin coal are subjected to mathematical analysis. The experimental dependences obtained may be used to formulate optimal coking batch in actual production conditions.     

Refractory Plastic Masses Based on Highly Concentrated Ceramic Binding Suspensions (HCBS). III. Structural-Mechanical Properties of Plasticized Masses Based on Bauxite HCBS and Characterization of Materials Derived from Them

Rheological properties of bauxite HCBS plasticized with refractory clay are studied in the yield state and the solid state. Specimens are prepared from the plasticized suspension with an optimum clay addition (5%), with a open porosity of 24.5% and a bending strength of 65 MPa (after heat treatment at 1300°C). A relation is revealed between the rheological properties and physicomechanical characteristics of plastic masses. The plastic masses studied can be used as matrices for fabrication of unmolded refractory materials.