Pelletizing lignite

Details Pelletizing lignite Pelletizing lignite

1981-01-16

1983-11-01

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 1G, 44 23, C10L 516, C10L 526

Patent

active

044128401

ABSTRACT:
Lignite is formed into high strength pellets having a calorific value of at least 9,500 Btu/lb by blending a sufficient amount of an aqueous base bituminous emulsion with finely-divided raw lignite containing its inherent moisture to form a moistened green mixture containing at least 3 weight % of the bituminous material, based on the total dry weight of the solids, pelletizing the green mixture into discrete green pellets of a predetermined average diameter and drying the green pellets to a predetermined moisture content, preferrably no less than about 5 weight %. Lignite char and mixture of raw lignite and lignite char can be formed into high strength pellets in the same general manner.

REFERENCES:
patent: 1290992 (1919-01-01), Hite
patent: 1382629 (1921-06-01), Darling
patent: 1477642 (1923-12-01), Gallsworthy
patent: 1556036 (1925-10-01), Schoch
patent: 2008147 (1935-07-01), Morrell
patent: 2310095 (1943-02-01), Lance et al.
patent: 2618537 (1952-11-01), Rabu
patent: 4302209 (1981-11-01), Baker et al.
Thermal Pretreatment and Pelletizing of No. Dakota Lignite, Oppelt et al., Report of Investigation 5382, U.S. Dept. of the Interior, 1958.
A Briquetting Process Using Pitch Emulsion, Proceedings 5th Biennial Briquetting Conference, pp. 33-37.

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