Measurement of viscosity of a melt in a plasma centrifugal furna

Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity

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73 5402, G01N 1100, G01N 1102

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active

058680276

ABSTRACT:
A system of determining a viscosity of a melt in a centrifugal furnace. In this system, the centrifugal furnace is rotated at a first rotational speed. The rotational speed of the centrifugal furnace is then changed to a second rotational speed. At least one physical characteristic is then measured during the transition from the first rotational speed to the second rotational speed. Based on this at least one measured physical characteristic, the viscosity of the melt can be determined. This at least one physical characteristic may be a time varying torque required to change the rotational speed of the centrifugal furnace from the first rotational speed to the second rotational speed. This at least one physical characteristic may also be a surface velocity and/or a height of the melt at a predetermined radial position in the centrifugal furnace in comparison with a velocity of the centrifugal furnace at the predetermined radial position. This at least one physical characteristic may also be a time variation of a change in a slope of the melt during the transition from the first rotational speed to the second rotational speed.

REFERENCES:
patent: 5187975 (1993-02-01), Chiba et al.
patent: 5269174 (1993-12-01), Chiba et al.
J. Air Waste Manage. Assoc., vol. 42, No. 10, pp. 1372-1376, Oct. 1992, Laura Staley, "Site Demonstration of the Retech Plasma Centrifugal Furnace: The Use of Plasma to Vitrify Contaminated Soil".
Plasma Centrifugal Furnace Development Program at the CDIF, pp. 1 to 30 and A-1 to A-8, Feb. 1993, Stephan T. Kujawa, et al.
Plasma Applications to Waste Treatment, pp. 1-9, Jan. 16-17, 1991, A.J. Vaill, "Plasma Centifugal Furnace Experiment Progress and Preliminary Test Results".
Proceedings of the International Topical Meeting on Nuclear and Hazardous Waste Management Spectrum '94, pp. 848-855, Aug. 14-18, 1994, D. Battleson, "Latest Developments of Plasma Technology at the CDIF".

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