Glass manufacturing – Processes – Slag – utilization
Patent
1998-11-12
2000-04-25
Vincent, Sean
Glass manufacturing
Processes
Slag, utilization
422162, 422232, 422239, 422242, C03B 518
Patent
active
060530103
ABSTRACT:
A method for aging steel-making slag comprising the steps of charging normal temperature steel-making slag crushed to the extent that the slag having a grain diameter of 25 mm or less which constitutes 80% or more of the total amount into a pressure vessel which can be closed tight enough to seal a pressure substantially higher than atmosphere. The pressure vessel is closed and pressureized steam is supplied into the said vessel for heating the said pressure vessel and slag to raise the temperature and the pressure in the said pressure vessel while discharging condensed hot water. The interior of the vessel is kept under a condition saturated by steam and pressurized up to 2 to 10 kg/cm.sup.2 G for 1 to 5 hours. The pressure in the pressure vessel is reduced to be equalized with atmosphere. The steel-making slag is then discharged from the vessel. Apparatus is provided for carrying out the above process and includes a pressure vessel having an opening lid for charging and discharging steel-making slag. A steam generating apparatus connected via a pipe having a valve to upward of the pressure vessel. A pipe having a steam trap connected at the lower position of the pressure vessel so as to discharge hot water. A pipe having a valve connected to the upper portion of the pressure vessel and open to the atmosphere so as to reduce the pressure in the interior of the pressure vessel.
REFERENCES:
patent: 1058158 (1913-04-01), Danforth, Jr.
patent: 2260710 (1941-10-01), Gschwind
patent: 3239200 (1966-03-01), Brown, Jr.
patent: 4211552 (1980-07-01), Tanaka et al.
Kinugawa Yoshitaka
Koide Hiroshi
Komai Keiichi
Morishita Shigeru
Suezawa Yosuke
Kawasaki Jukogyo Kabushiki Kaisha
Sumitomo Metal Industries Ltd.
Vincent Sean
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