Increase of non-stick properties of steel castings using industrial man$made waste in molding sands

The problems of improving the non-stick properties of castings, in particular, the use of molding sands with the addition of industrial man-made waste are considered. The results of industrial tests of such mixtures, their properties and analysis of the quality of technological samples are presented. Keywords: burn-in, industrial waste, molding sands, industrial tests, technological sample. [email protected]

Technological sample for evaluation of filling capacity of thin-walled body aluminum castings

Prerequisites for development of technological sample design for assessment of filling capacity of thin-walled body parts of complex configuration with wall thickness of 3 mm are considered. The production process of the obtained sample, as well as the results of its application for aluminium alloys are presented.

Assessment of the quality of the magnetic concentrates of the titanium ores at Pizhemsky deposit from the point of view of the technological mineralogy

Four magnetic fractions of small classes concentrates (0,05—0,125 mm) of a representative technological sample have been separated from titanium-bearing medium thickness sandstones of Malorucheysky unit (Pizhemsky titanium deposit). They have been studied: general sample (T-2) and three partial (T-l a, b, c) ones obtained by gravitational separation in heavy liquid in three density intervals (3,3—3,5; 3,5—3,7; 3,7—3,9 g/cm3). It has been demonstrated that the magnetic fraction of the small productive classes consists mainly of pseudorutil, ilmenite, siderite (ironstone) and garnet. The phase composition of iron-titanium phases has been reliably established by the means of normative recalculation of chemical analysis data, as well as methods of Mossbauer spectroscopy, infrared (IR) absorption and electron paramagnetic resonance (EPR). The ratio of the pseudorutile, ilmenite, siderite and associated rare earth minerals monazite-kularite and zircon accumulated in the respective gravity classes, has been computed . It has been recommended to use the methods of recovery of the concentrates (extraction of zircon and monazite) before the operation of desilication, as well as their purification from siderite.

Measurements of X-ray radiation of the Sun on the heliogeophysical measuring equipment of spacecraft of the Russian Hydrometheorological Service

The characteristics of the equipment for monitoring X-ray solar radiation onboard geostationary satellites. A reference base for X-ray flux meters of the DIR-E was developed and experimental studies of the characteristics on the technological sample of the device were carried out. The calibration procedure of DIR-E for use in measurements on perspective space vehicles was also developed.

Mineralogical Investigation and Hydrometallurgical Characteristics of Uranium and Rare Earth Elements, Mineralization of El Hammamat Sediments, G. Gattar, Eastern Desert - Egypt

The uranium occurrence of GV is considered as perigranitic uranium deposits while all the others are considered as intragranitic ones. The principal economic minerals were separated and identified. Uranophane was found to represent the main uranium mineral while the REEs occur in the form of very fine disseminated grains of light elements or else in the form of heavy elements associated with the iron oxides and clay fraction of the host rock. For geochemical and hydrometallurgical works, a technological sample of (4000ppm U and 3500ppm REE) at the Northern part of the Eastern Desert, Hammamat GV mineralization of G. Gattar was collected. The collected ore material was then subjected to chemical processing involving sulphuric acid leaching and the dissolved U and REE were separated from the obtained leach liquor. Two alternatives have been studied, namely ion exchange for U following oxalate precipitation for the REEs or else selective successive precipitation.

Fibre Reinforced Refractory Castables :An Alternative Solution for SPF Die Manufacturing

Today heat resistant cast steels are the nominal solution for Ti-SPF forming die manufacturing. Nevertheless, this materials present some drawbacks related to delivery time and cost. A fibre reinforced refractory castable (FRRC) is proposed as a new solution for prototype SPF die manufacturing. Due to the general brittleness of refractory castables, a short fibre reinforcement has been investigated in order to avoid catastrophic failure during the forming process. General macroscopic behavior of such materials is very complex and presents large evolutions with the testing temperature. The paper addresses the important benefits of the reinforcement for refractory castable in the case of loading on a complex structure. The capability of the material to support several cracks is shown in the case of a technological sample with a complex shape.