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Melting Metals

Conduction furnaces utilize a Hquid at the operating temperature to transfer the heat from the heating elements to the work being processed. Some furnaces have a pot filled with a low melting metal, eg, lead, or a salt mixture, eg, sodium chloride and potassium chloride, with a radiation-type furnace surrounding the pot. Although final heat transfer to the work is by conduction from the hot lead or salt to the work, the initial transfer of heat from the resistors to the pot is by radiation. [Pg.137]

Thermal or Flame Spray Process. The earliest experiments in metal spray used molten metal fed to a spray apparatus, where it was dispersed by a high speed air jet into tiny droplets and simultaneously blown onto the surface of the part to be covered. The metal solidified on contact. Modem processes use a more convenient source than premelted metal. Spray heads using a flame or an electrical arc to melt metal wires or powders directly are much more convenient. These are the only types used on a large scale in the United States. [Pg.134]

Refractory Materials. Extremely high melting metals and those that are more resistant to deformation when hot are considered refractory... [Pg.190]

Dissolution of Silver. Silver is dissolved by oxidising acids and alkaU metal cyanide solutions in the presence of oxygen. The latter method is the principal technique for dissolving silver from ore. Silver has extensive solubiUty in mercury (qv) and low melting metals such as sodium, potassium, and their mixtures. Cyanide solutions of silver are used for electroplating and electroforming. The silver is deposited at the cathode either as pure crystals or as layers on a mandrel. [Pg.83]

Many of the processes used for working metals are energy-intensive. Large amounts of energy are needed to melt metals, to roll them to sections, to machine them or to weld them together. Broadly speaking, the more steps there are between raw metal... [Pg.155]

Detailed, critical surveys of the variants and complexities of crystal growth from the melt were published for low-melting metals by Goss (1963) and for high-melting metals (which present much greater difficulties) by Schadler (1963). [Pg.164]

Heat gains and losses for heating or cooling raw materials and parts brought into or taken out of the building, melted metal solidification, vapor condensation, or liquid evaporation... [Pg.423]

It is sometimes cliflicult to detect nitrogen by the sodium test. The result should not be regarded as conclusive, especially if the substance is volatile, unless it has been dropped in small quantities at a time into the melted metal, which should be heated in a hard-glas.s tube clamped in a retort-.stand. Special care must be used with nitro compounds, which may explode and shatter the Lube. [Pg.324]

The Group 1 elements are soft, low-melting metals which crystallize with bee lattices. All are silvery-white except caesium which is golden yellow "- in fact, caesium is one of only three metallic elements which are intensely coloured, the other two being copper and gold (see also pp. 112, 1177, 1232). Lithium is harder than sodium but softer than lead. Atomic properties are summarized in Table 4.1 and general physical properties are in Table 4.2. Further physical properties of the alkali metals, together with a review of the chemical properties and industrial applications of the metals in the molten state are in ref. 11. [Pg.74]

Some physical properties of the elements are compared in Table 10,2. Germanium forms brittle, grey-white lustrous crystals with the diamond structure it is a metalloid with a similar electrical resistivity to Si at room temperature but with a substantially smaller band gap. Its mp, bp and associated enthalpy changes are also lower than for Si and this trend continues for Sn and Pb which are both very soft, low-melting metals. [Pg.371]

Lloyd, E. D. in Plansee Proceedings 1958—High Melting Metals, Metallwork Plansee AG, Reutte Tyrol, 249-256 (1959)t... [Pg.861]

Lloyd, E.D., 1958 High Melting Metals , Plansee Proceedings, Metallwerk Plansee A.G., Reutte, Tyrol, 249-256 (1959)... [Pg.904]

Aluminum and aluminum alloys Copper and copper alloys Rare-earth and rare-earth-like metals and alloys Low-melting metals and alloys Miscellaneous nonferrous metals and alloys Nickel and nickel alloys Precious metals and alloys Reactive and refractory metals and alloys... [Pg.29]

Values for comparison melting point of W 3420 °C (highest melting metal), sublimation point of graphite approximately 3350 °C. [Pg.195]

Reverberatory furnaces melt metals in batches using a pot-shaped crucible that holds the metal over an electric heater or fuel-free burner. The flux reacts with impurities. [Pg.155]

Low melting metals (Sn and also Bi, In, Pb, and Cd) are extensively used as solvents in calorimetric studies of metallic phases [35]. Transition metals do not, however, dissolve readily in tin [43] and other solvents such as Cu and A1 have been used. An experimental probe for high-temperature solution calorimetry is shown in Figure 10.8. [Pg.316]


See other pages where Melting Metals is mentioned: [Pg.366]    [Pg.421]    [Pg.122]    [Pg.137]    [Pg.289]    [Pg.125]    [Pg.389]    [Pg.189]    [Pg.23]    [Pg.56]    [Pg.273]    [Pg.562]    [Pg.538]    [Pg.376]    [Pg.577]    [Pg.30]    [Pg.2448]    [Pg.232]    [Pg.344]    [Pg.35]    [Pg.311]    [Pg.441]    [Pg.245]    [Pg.349]    [Pg.94]    [Pg.722]    [Pg.762]    [Pg.167]    [Pg.498]    [Pg.71]    [Pg.280]    [Pg.482]    [Pg.45]    [Pg.97]    [Pg.40]   
See also in sourсe #XX -- [ Pg.7 , Pg.60 , Pg.383 ]




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Actinide metals melting point

Alkali metal chloride melts

Alkali metal halide melt

Alkali metal melts

Alkali metals melting point

Alkaline earth metals melting point

Anodic dissolution of vanadium metal in NaCl-KCl melts

Contaminated metallic scrap, melting

Coordination of transition metal ions in silicate melts

Distributions of transition metals between crystals and melts

Ferrous metal melting

High melting temperature metals

High-melting metals

High-purity metals, melting points

High-temperature hydrolysis of melts based on alkali metal halides

Low melting-point metals

Melt atomization molten metals

Melt viscosity metal

Melting and metal treatment

Melting block metals

Melting of metals

Melting point commercial metals and alloys

Melting point of alkali metals

Melting point of metals

Melting point of rare earth metals

Melting point of the metal

Melting point trend in the binary alkaline earth metal alloys

Melting points J-block metals

Melting points group 2 metal oxides

Melting points metallic elements

Melting points, metals

Melting points, transition-metal

Melting temperatures metals

Melting transition metal carbides

Melting transition metals

Melting, directed metal oxidation

Melting-Points and Possible Sintering Temperatures of Metals

Melts based on alkali metal halides

Melts metal complexes

Metal melt index

Metal melting, entropy changes

Metal melting-point depression

Metallic melt deposition

Metallic melts

Metallic melts

Metals and Alloys with Low Melting

Metals and Alloys with Low Melting Temperature

Metals vacuum melting

Metals with high melting points

Non-ferrous metal melting

Oxide solubilities in melts based on alkali- and alkaline-earth metal halides

Oxoacidity scales for melts based on alkali- and alkaline-earth metal halides

Process flow diagrams for the melting and metal treatment of cast iron

Regularities of oxide solubilities in melts based on alkali and alkaline-earth metal halides

Silicate melts transition metal ions

The Stable Complex Species in Melts of Alkali Metal Halides Quantum-Chemical Approach

Transition metal nitrides melting

Trends in Melting Points of Metals

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