Heating – Processes of heating or heater operation – Of heating a fluid
Patent
1982-01-15
1984-03-06
Camby, John J.
Heating
Processes of heating or heater operation
Of heating a fluid
75123J, 266286, 432214, 432216, F24H 700, C22C 3300, C21B 702, C21B 900
Patent
active
044351577
ABSTRACT:
A heat exchanger and especially a blast preheater (or cowper) for blast furnaces with refractory lining, insulating layer and steel jacket is described, the insulating layer of which is designed so that a steel jacket temperature of from 20.degree. to 60.degree. C. can be set and that said steel jacket is made of chromeless structural steel having a molybdenum content in the range from 0.01 to 2% by weight. The blast preheater (or cowper) has a prolonged service life and a low tendency to nitrate tension crack corrosion of the jacket sheet, for which reason it is very suitable for use in a process for the temperature control of gas and blast for the blast furnace. The process is suitable for blast preheaters (or cowpers) with external or internal combustion chamber or checker chamber and downstream collector ducts.
REFERENCES:
patent: 2533457 (1950-12-01), Hasche
patent: 4003695 (1977-01-01), Kandakov et al.
patent: 4022572 (1977-05-01), Klein et al.
patent: 4222772 (1980-09-01), Sogo et al.
Buhler Hans-Eugen
Kalfa Horst
Brohltal-Deumag AG fur feuerfeste Erzeugnisse
Brunsvold Brian G.
Camby John J.
Murray, Jr. Everett H.
Peterson Stephen L.
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