Material comprising gypsum and blast furnace slag, a process and an installation of making the same
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United States of America Patent
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Issued Date -
Jan 20, 2005
app pub date -
May 18, 2004
filing date -
Dec 3, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention refers to a recovery proceeding which consists in achieving a thermic transfer from slag to a calcium sulphate dihydrate rock, with the maximum dimension of the granules of 20 mm., in a temperature interval of 100-145.degree. C., into the tank of an autoclave, to a bigger pressure than the saturation pressure of the steams, which corresponds to the temperature of the slag-rock mixture in the autoclave, obtaining, after processing, new types of binders. The installation by which the proceeding is achieved is endowed with equipment that consists in a slag pot (s), the inclined slag runner (1), the bunker (2) with feeding and dosing equipment (3), the drain (4), designed to attain, for the raw materials, impact speeds of 4-6 m/s and impact angles of 40-70.degree., the autoclave with tank (5), evacuation door (6) and lid (7), classic equipment used in the building materials industry. The new types of binders, according to the invention, named high strength hydraulic plaster and much slag-high strength hydraulic plaster, have hydraulic properties and high strength at compression with values which are approximately of 25-40 MN/m.sup.2.
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