Product composition of the dynamic conversion of brown coal in supercritical water

The product composition of the dynamic conversion of brown coal, which was continuously supplied as a water-coal slurry to a flow reactor at 30 MPa, was studied. The temperature of water and coal particles was increased from room temperature to 400°C (top part of the reactor). The conversion of the organic matter of coal was ～48%, and the products collected at the reactor outlet consisted of solid tar components, substances dissolved and emulsified in water, and volatile substances, whose major constituent was CO₂. The composition of solid tar components and oils was determined.     

High-temperature rheological properties of clay bodies and bodies plasticized with clay

Conclusions We determined the rheological properties of clay materials at elevated temperatures. With an increase in the temperature and pressure the structural-mechanical constants diminish, and the plasticity increases. The total proportion of elastic and plastic deformations reaches significant values (92–95%) in kaolins at 1450°C, and in Chasov-Yar clay at 1200–1250°C. It is in these conditions precisely that we obtain the densest thermal-pressed products.With optimum thermoplastic pressing temperatures the various clay materials have the closest viscosity and maximum yield point values.The best natural raw material for thermoplasticizing is Chasov-Yar clay, but it is possible to use other clay materials. It is possible to regulate the rheological properties of bodies by varying the compositions (filler + thermoplasticizer) of the bodies, the pressing temperature, and pressure.The rheological properties of mixtures of zircon and thermoplasticizer (10% Chasov-Yar clay) at 1450–1480°C facilitate the production of especially dense products for continuous steel casting. Tests carried out on continuous casting plant were successful.Translated from Ogneupory, No. 6, pp. 43–51, June, 1973.     

The manufacture of lightweight,heat-insulating refractory goods with an operating temperature up to 1750°C

Conclusions The possibility is shown of obtaining lightweight refractories with an operational temperature of 1750°C and having a wide range of properties. The use of these refractories depends on the particular requirements and the conditions of service.Translated from Ogneupory, No. 3, pp. 24–28, March, 1986.     

Theoretical analysis of chemisorption of gases in a three-phase system

Kinetics of chemisorption of sulfur dioxide by a limestone suspension is theoretically analyzed and a chemisorption mathematical model, which is used to determine the treatment efficiency of the gas, is developed. It is shown that the gas treatment efficiency considerably increases for the chemical absorption by a suspension containing solid absorbent particles as compared with physical absorption. The gas treatment efficiency rises with increasing solid absorbent mass in the solution and decreasing size of the particles.     

Introduction of a method of rammed linings of 230-ton steel teeming ladles

Refractories and Industrial Ceramics -     

Separation of Concentrated Solid–Liquid Systems

The effect of the interaction between particles of the settling solid phase on the separation efficiency in hindered settling of a suspension is analyzed.