The article presents the results of research of dryung asbestos ores in a suspended layer. Equations are obtained that reflect the effect of the initial moisture content of the ore on the Nusselt criterion. The obtained dependencies can be used for calculating tube-dryers for asbestos ores in a suspended layer.

Keywords: drying, tube-dryer, asbestos ore, suspended layer, moisture content, speed of the material, mass transfer coefficient, Reynolds criterion, Nusselt criterion, criterion equations

This article describes a method for producing two-component nonisocyanate insulating foams and technology of its spraying on the insulated surface. It describes the device, which, along with standard equipment, includes principally new design of components pre-mixing chamber. Constructive solutions described in the article will allow using the compositions which have different time and temperature of curing than conventional PU foams.

Keywords: Keywords: spray foams, insulating foams, nonisocyanate urethanes, pre-mixing chamber.