Heating – Work chamber having heating means – Crucible or pot heating furnace
Patent
1995-07-26
1997-02-04
Kamen, Noah P.
Heating
Work chamber having heating means
Crucible or pot heating furnace
432 18, F27B 1414
Patent
active
055991823
ABSTRACT:
A heated crucible apparatus allows the adjustment of a thermal profile within a combustion chamber surrounding the crucible by introducing a sub-stoichiometric or a super-stoichiometric mixture of fuel and oxidant into the combustion chamber and varying the oxidant flow for sub-stoichiometric or fuel flow for super-stoichiometric downstream of the initial combustion to control the release of heat in defined areas within the combustion chamber. The adjustable thermal control system allows for an even thermal energy release or varying thermal energy release over the length of the crucible. The apparatus a crucible having an inlet and and outlet surrounded by the combustion chamber which chamber includes an oxidant and fuel supply at the primary injection point followed by secondary injection of the remaining oxidant supply for sub-stoichiometric (or fuel supply for super-stoichiometric) at specific intervals to achieve the desired thermal profile and heating of the crucible. The oxidant and/or fuel stream may be pre-heated to maximize thermal efficiency. The combustion system allows for the use of gaseous, liquid and solid fuels as well as oxidant streams with varying concentrations of oxygen. The crucible has a cooling heat exchanger located adjacent the outlet to control the temperature of materials leaving the crucible.
REFERENCES:
patent: 2673728 (1954-03-01), Grosskloss
patent: 3459414 (1969-08-01), Schmidt
patent: 4453913 (1984-06-01), Gitman
patent: 4801261 (1989-01-01), Hagar
patent: 4927349 (1990-05-01), Schirmer et al.
patent: 5013236 (1991-05-01), Khinkis
patent: 5085156 (1992-02-01), Dykema
patent: 5158445 (1992-10-01), Khinkis
patent: 5215455 (1993-06-01), Dykema
Andrews William C.
Nabors, Jr. James K.
Hobby III William M.
Kamen Noah P.
Xothermic, Inc.
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