The Role of Arc-Plasma in Metallurgy

Moss, A.R.; Young, William J.

doi:10.1179/pom.1964.7.14.012

Cited by 14 publications

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“…A large number of studies describing methods of obtaining spherical granules of refractory and highmelting materials deal with heat methods, including flashing of particles of irregular shape in plasma [1][2][3], an electronic beam [4], or in an arc discharge. A large number of studies describing methods of obtaining spherical granules of refractory and highmelting materials deal with heat methods, including flashing of particles of irregular shape in plasma [1][2][3], an electronic beam [4], or in an arc discharge.…”

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Production of spherical granules from thermoplastic slips

Kindinova¹,

Kurskaya²,

Sofeichuk³

et al. 1980

Refractories

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The specimens without A1203 additives were deformed after the slag-resistance test and it was passible to distinguish three zones: a working, a slightly changed, and an unchanged zone. The working zone, up to 6 mm in depth, was penetrated by slag (Fig. 2, shown by the darker color in specimens 3 and 4). It is obvious under a microscope that the SiC grains are unchanged; the chamotte grains are flashed-off superficially; and the bonding mass is completely penetrated by slag and has coalesced with it. The slightly changed zone, ~ 1.2 mm thick, is paler than the worMng zone but its bonding mass of a whitish brown color has been flashedoff and compacted. The unchanged zone is loose, opaque, and af a fine-dispersed texture.The petrographic study established that the specimen containing 25.9% of Al~O 3 is not wetted by slag and the material is strong. Thus, the addition of corundum waste to the mass increases its metal-and slagresistance. CONCLUSIONSThe effect of the addition of silicon carbide and corundum waste products on the properties of a tamping mass has been studied.It is established that the best tamping mass includes 25.9% chamatte; 25.9% silicon carbide waste; 14.8% sand; 25.9% corundum waste; and 7.5% clay.

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“…Differential curves of the size distribution of spherical granules obtained from powders of specific surface 7000 (1); 5000 (2); and 3200 cm2/g(3).…”

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