Method and apparatus for process and quality control in the prod

Details Method and apparatus for process and quality control in the prod Method and apparatus for process and quality control in the prod

1999-02-01

2000-09-05

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

266 79, C22B 900

Patent

active

061136697

ABSTRACT:
A method and apparatus are provided for rapidly and accurately processing the chemical composition of a molten metal bath within a furnace. The apparatus includes a robotically-controlled probe which operates to obtain a sample from any predetermined depth of the vessel. The probe is moved from the vessel to a thermostabilized atomic emission spectrometer in nearby proximity to the vessel wherein a part of the probe containing the sample is joined with an upper chamber housing to form an excitation chamber. Within the excitation chamber, the optical emission spectrum of the sample is excited by an excitation source. The optical spectrum is transmitted to an analyzer where the elemental concentration of the sample is determined. Immediately responsive to this analysis, adjustments are made in processing to achieve the target grade of steel.

REFERENCES:
patent: 3920447 (1975-11-01), Schroeder et al.
patent: 4615225 (1986-10-01), Sainz
patent: 5082044 (1992-01-01), Christensen
patent: 5278629 (1994-01-01), Schlager et al.
patent: 5526110 (1996-06-01), Braymen
patent: 5671045 (1997-09-01), Woskov et al.
patent: 5889587 (1999-03-01), D'Silva et al.

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