Off-size greenware (the product resulting from the initial gelation and filter pressing of calcareous and siliceous materials in an aqueous slurry) is recycled. The greenware is pulverized into a desirable size and combined with new calcareous and siliceous materials in the initial slurrying step. The slurry containing recycled greenware gels at an improved rate.
Method For Recycling Greenware In The Manufacture Of Hydrous Calcium Silicate Insulation Products
Off-size greenware (the product resulting from the initial gelation and filter pressing of calcareous and siliceous materials in an aqueous slurry) is recycled. The greenware is pulverized into a desirable size and combined with new calcareous and siliceous materials in the initial slurrying step. The slurry containing recycled greenware gels at an improved rate.
Water Alkalinity Control In The Manufacture Of Hydrous Silicate Products
Jerry L. Helser - Hebron OH William H. Rigby - Newark OH
Assignee:
Owens-Corning Fiberglas Corporation - Toledo OH
International Classification:
B28B 300
US Classification:
264 37
Abstract:
The water resulting from the filter press molding of slurries of hydrated lime and reactive silica in the manufacture of hydrous calcium silicate products is recycled to the process by treating it with carbon dioxide to precipitate dissolved calcium hydroxide, filtering, and returning the filtered water to the process step wherein the lime and silica are slurried in water.
Expanded Inorganic Aggregate Bonded With Calcium Silicate Hydrate As Thermal Insulation
Richard F. Shannon - Lancaster OH Jerry L. Helser - Hebron OH
Assignee:
Owens-Corning Fiberglas Corporation - Toledo OH
International Classification:
C04B 1310
US Classification:
264 82
Abstract:
Rigid shaped articles of expanded inorganic aggregate, such as expanded perlite, bonded with calcium silicate hydrate and preferably reinforced with fibers, are made by mixing a hydrothermally reacted gel of calcium silicate hydrate crystals with the expanded aggregate, shaping and drying, without treatment with saturated steam after the gel and aggregate have been mixed.
Method For Making Xonotlite Insulation By Foaming An Aqueous Slurry Of Calcareous And Siliceous Reactants And Cellulosic And Glass Fibers
Rigid cellular hydrous calcium silicate thermal insulating product of low density can be made by aerating an aqueous slurry containing reactive calcareous and siliceous materials, preferably in conjunction with the incorporation of a foaming agent in the slurry, and then indurating the aerated slurry by the application of heat and pressure.