GB263942A - A binder for the briquetting or moulding of fuels, minerals, earths and other substances in finely divided or pulverised form - Google Patents

Abstract

263,942. Tapping, A. Oct. 6, 1925. Emulsions, making.-A binder for briquetting fuel, minerals, earths, &c. consists of a homogeneous mixture of a solid bituminous substance and an aqueous pulp of a starch-bearing vegetable material with or without a small amount of an alkaline substance and a preservative, the incorporation of the ingredients in equal or any other proportions being effected under heat and pressure. An enclosed vessel having stirring gear and a pressure gauge and valve may be employed, the vapour pressure being controlled so as to maintain the temperature above the melting point of the bituminous ingredient and so as to regulate the amount of moisture required in the final product. As the, bituminous substance mav be employed coal tar pitch, bitumen, natural asphalt or the residue from the distillation of asphaltic petroleum or mixtures of these substances ; the aqueous pulp may be made from prepared starch, the flour or meal of wheat, barley, rice, maize &c., or from peas, beans, potatoes, artichokes, acorns, chestnuts, cassada, cotton seed, flax-seed, hemp-seed, or waste products such as bran, chop, brewers' waste, husks, peelings, shells, &c. Soda, ammonia or sodium silicate may be used as the alkaline substance, and salicylic acid cresol, phenol, or formaldehyde as the preservative. As discharged from the mixing vessel the binder is in semi-liquid form and may be added directly to the pulverized material to be briquetted. or it may be allowed to set and then ground before mixing with the material.