Patent ID: 8114821
Filing Date: 2012-02-14
Classification: C04B,C10M,C10N

Abstract:
1. A method for producing solid lubricant agglomerates comprising: admixing a particulate solid lubricant, an inorganic water dispersible binder, and water to produce a mixture having about 5 to 60 weight % solids based on the total weight of the mixture, wherein the ratio of the weight of the solid lubricant being admixed to the weight of the inorganic water dispersible binder being admixed is from about 19:1 to about 1:19 and wherein the inorganic water dispersible binder is a hydrous aluminum silicate that is stabilized at a temperature above about 850° C.; particulating the mixture and drying the particulated mixture to produce dry agglomerates at a temperature below the stabilizing temperature at which the inorganic water dispersible binder is rendered non-dispersible in the water; classifying the dry agglomerates by size, or milling and classifying the dry agglomerates by size, into an undersize particle fraction; a desired particle size fraction and an oversize particle fraction; recycling and admixing the undersize particle fraction with the particulate solid lubricant, the inorganic water dispersible binder and the water in the mixture, recycling and admixing the oversize particle fraction with the particulate solid lubricant, the inorganic water dispersible binder and the water in the mixture, for redispersion of the undersize and the oversize particle fractions in the water to form the mixture, and heating the desired particle size fraction to the temperature effective to render the inorganic water dispersible binder in the dry agglomerate of the desired particle size fraction non-dispersible in the water.