초록 ▼

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. T

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.

대표청구항 ▼

A moldable slurry for manufacturing low density hydrated calcium silicate heat insulating bodies comprising an aqueous slurry of reactive calcareous and siliceous materials and particulated greenware, and produced by a process including the steps of: a. preparing a moldable slurry comprising a water

A moldable slurry for manufacturing low density hydrated calcium silicate heat insulating bodies comprising an aqueous slurry of reactive calcareous and siliceous materials and particulated greenware, and produced by a process including the steps of: a. preparing a moldable slurry comprising a water dispersion of reactive calcareous and siliceous containing materials; b. partially gelling said dispersion by heating at a temperature of approximately 180°-210°F.; c. molding said partially gelled dispersion and expressing water therefrom thereby forming rigid greenware articles; d. removing portions of said greenware articles selected for recycling to the process; e. curing the remaining molded articles by heating and pressurizing; and f. pulverizing the selected greenware articles from step d to form particulated greenware and adding said particulated greenware to the composition of step a in a subsequent cycle of the process.