منابع مشابه
NEW REFRACTORY MATERIALS FOR THE COPPER INDUSTRY
Wear of various basic refractory materials to substitute to currently used magnesia chrome bricks has been studied, measuring matte and slag penetration and dissolution, through different cup and rotary slag tests. High magnesia with and without impregnation, magnesia graphite, magnesia-alumina spinel with and without impregnation, olivine-magnesia and olivine magnesia- graphite bricks, as well...
متن کاملHIGH TEMPERATURE ELASTIC PROPERTIES OF REFRACTORY MATERIALS
Abstract: A pulse-echo technique, based on ultrasonic "long-bar" mode (LBM) velocity measurements, working up to 1700°C is described. Magnetostrictive transducers and ultrasonic lines used in a 40-85 kHz frequency range are detailed. The conditions of choice of fundamental parameters (frequency, line geometry, sample size) are discussed in relation with the nature and the microstructure of ...
متن کاملCombustion joining of refractory materials
This paper overviews heterogeneous exothermic reactive systems as they apply to the joining of materials. Techniques that are investigated fall under two general schemes: so-called Volume Combustion Synthesis (VCS) and Self-Propagating High-Temperature Synthesis (SHS). Within the VCS scheme, applications that are considered include Reactive Joining (RJ), Reactive Resistance Welding (RRW), and S...
متن کاملDealing with Spent Refractory Materials
The disposal of spent refiactory materials has become a major problem for metals producers. The main issue surrounding refractory disposal is the elimination of the hazardous components of refractories, most commonly chrome-bearing materials and fluoride and cyanide in spent pot-liners. The various approaches to pollution prevention involve re-design to eliminate or significant reduction in was...
متن کاملNatural radioactivity concentration in raw materials used for manufacturing refractory products
Background: Some Particular areas contain natural radionuclide at levels much higher than those usually present in earth's crust. The radiological impact of the use of zirconium ore in zirconium industry is due to internal exposure of the lung by alpha particles and external exposure of the body by the gamma rays. The result of gamma spectrometry measurement of the concentrations of th...
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ژورنال
عنوان ژورنال: Nature
سال: 1916
ISSN: 0028-0836,1476-4687
DOI: 10.1038/098281a0