Coal briquetting process
AssigneeCoal Industry (Patents) Limited
InventorsJoseph Goleczka, Walter Harris, Stephen Sawyer, Simon Kelly
Life of this patent
Estimating the term…
Abstract
A cold coal briquetting process comprises mixing fine coal with polyvinyl alcohol and a hardening agent selected from iron oxide, phosphate rock and bauxite or combination of two or more thereof. The process permits economies in process and capital costs compared to existing briqueting processes, while still producing satisfactory briquettes.
Claims7
A briquetting process comprising mixing fine coal with a binder comprising up to 2%, by weight of the resulting mixture, of polyvinyl alcohol solids, in aqueous solution, and up to 4%, by weight, of a hardening agent for the polyvinyl alcohol selected from iron oxide, phosphate rock, bauxite or a combination of two or more thereof, and briquetting the coal/binder mixture.
A coal briquette comprising a mixture of fine coal and a binder comprising up to 2%, by weight of the mixture, of polyvinyl alcohol solids and up to 4% by weight of a hardening agent for the polyvinyl alcohol, selected from iron oxide, phosphate rock and bauxite or a combination of two or more thereof.
Dependencies are inferred from the claim text.