Vinylamine copolymer flocculangts for use in coal refuse thickening

摘要

The invention provides a method for dewatering coal tailing aqueous slurries. The method including the step of adding to the slurry a flocculant composition including a vinylamine polymer including from about 1 to about 100 mole percent vinylamine and from about 1 to about 99 mole percent of at least one monomer selected from the group consisting of vinylformamide, vinyl acetate, vinyl pyrrolidinone, vinyl alcohol and the esters, amides and salts of acrylic acid and methacrylic acid.