Processing additive for high-pressure roll press process of forming finish grind cement

Ferraris, CF., Gartner, EM., & Myers, D. (1992). Processing additive for high-pressure roll press process of forming finish grind cement. (U.S. Patent No. 5203512). http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5203512

Abstract

An improved high-pressure roll press process for forming finish ground cement is disclosed and is achieved by treating the material entering the roll press with a small amount of a hydroxyl or alkoxyl compound selected from lignin, phenol or monopropylene glycol or mixtures thereof.

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