Evaluation of the efficiency of the technological process for the production of building products with fillers from metallurgical slag

The article presents studies related to the practical use of metallurgical slags by Limited Liability Partnership (LLP) “Casting”, Limited Liability Partnership “Kazakhstan Steel Production-steel” in the production of building products. The process of preparation and experiments to determine the strength of control samples, full-scale tests of building products are shown. The relevance of the study lies in the fact that the technological process of production of building products involves technogenic waste that cannot be used in the process of metal production, which makes it possible to improve the ecological background in the region, as well as promising opportunities for obtaining raw materials used as ingredients of concrete mixtures. The presented practical implementation of the automation of the process of adding fillers (technogenic raw materials) in the preparation of a concrete mix allows increasing the efficiency and productivity of the production of building products. The article will be useful to everyone who conducts research in the field of recycling of industrial waste from metallurgy, as well as commercial use

Evaluation of the efficiency of the technological process for the production of building products with fillers from metallurgical slag

The article presents studies related to the practical use of metallurgical slags by Limited Liability Partnership (LLP) “Casting”, Limited Liability Partnership “Kazakhstan Steel Production-steel” in the production of building products. The process of preparation and experiments to determine the strength of control samples, full-scale tests of building products are shown. The relevance of the study lies in the fact that the technological process of production of building products involves technogenic waste that cannot be used in the process of metal production, which makes it possible to improve the ecological background in the region, as well as promising opportunities for obtaining raw materials used as ingredients of concrete mixtures. The presented practical implementation of the automation of the process of adding fillers (technogenic raw materials) in the preparation of a concrete mix allows increasing the efficiency and productivity of the production of building products. The article will be useful to everyone who conducts research in the field of recycling of industrial waste from metallurgy, as well as commercial use

Mathematical formulation and the problem solution of clustering recipes of concrete mixtures using technogenic waste and slags of metallurgical enterprises

The relevance of the use of man-made waste and slags of metallurgical enterprises as a replacement for traditional fillers in concrete mixes has good potential due to producing high strength characteristics and reducing the cost of manufactured building products. The aim of the research is a mathematical formulation of the problem solution of clustering concrete mix recipes using man-made waste and slags of metallurgical enterprises, the criteria are the composition and strength of concrete mix recipes made experimentally. The statistical methods usage of analysis made it possible to determine the measures of the proximity of clusters, to produce clusters with optimal formulations of concrete mixtures

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Copyright 2003 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the authors and the American Institute of Physics. This article appeared in the Journal of Applied Physics and may be found at: http://link.aip.org/link/?JAPIAU/94/5504/1Atmospheric pressure glow discharges are attractive for a wide range of material-processing applications largely due to their operation flexibility afforded by removal of the vacuum system. These relatively new atmospheric plasmas are nonequilibrium plasmas with gas temperature around 100 °C and electron temperature in the 1–10 eV range. Their appearance is characteristically diffuse and uniform, and their temporal features are repetitive and stable. Of the reported numerical studies of atmospheric glow discharges, most are based on the hydrodynamic approximation in which electrons are assumed to be in equilibrium with the local electric field. Spectroscopic and electrical measurements suggest however that the cathode fall region is fundamentally nonequilibrium. To this end we consider a hybrid model that treats the cathode fall region kinetically but retains a hydrodynamic description for the region between the thin cathode fall layer and the anode. Using this hybrid model, a helium discharge system excited at dc is studied numerically for a very wide current density range that spans from Townsend dark discharge, through normal glow discharge, to abnormal glow discharge. Numerical results confirm many distinct characteristics of glow discharges and compare well with that of low-pressure glow discharges. Generic relationships, such as that between the electric field and the current density, are also established and are in good agreement with experimental data. This hybrid model is simple and insightful as a theoretical tool for atmospheric pressure glow discharges

Plasma–liquid interactions: a review and roadmap

Plasma–liquid interactions represent a growing interdisciplinary area of research involving plasma science, fluid dynamics, heat and mass transfer, photolysis, multiphase chemistry and aerosol science. This review provides an assessment of the state-of-the-art of this multidisciplinary area and identifies the key research challenges. The developments in diagnostics, modeling and further extensions of cross section and reaction rate databases that are necessary to address these challenges are discussed. The review focusses on non-equilibrium plasmas