Flotation Organic Depressant—Carboxymethyl Cellulose

In the flotation of tungsten ore, organic inhibitors are divided into macromolecular organic inhibitors and small molecule organic inhibitors. In recent years, organic inhibitors have good selectivity to minerals due to their diverse structures, and are environmentally friendly. Favored, organic inhibitors are characterized by "focus" and have special inhibitory effects on some gangues, so they are sometimes used separately from water glass. Here we will introduce a macromolecular flotation that has been used in industrial production Organic Inhibitor—Carboxymethylcellulose.

Carboxymethyl cellulose, also known as CMC, is obtained after carboxymethylation of cellulose. Carboxymethyl cellulose is an anionic cellulose ether. Its appearance is white or slightly yellow flocculent fiber powder or white powder. Odorless, tasteless, non-toxic; easily soluble in cold or hot water, forming a transparent solution with a certain viscosity.

Carboxymethyl cellulose aqueous solution has the functions of thickening, film forming, bonding, water retention, colloid protection, emulsification and suspension, etc., and is widely used in industries such as petroleum, food, medicine, textile and papermaking. Carboxymethyl cellulose also has a skill in the field of selection. my country began to study the inhibitory effect of carboxymethyl cellulose in 1965. The study found that the higher the degree of etherification of carboxymethyl cellulose, the better the water solubility, and it can produce more Strong mineral inhibition ability, the degree of etherification above 0.45 can meet the requirements of flotation inhibitor.

Carboxymethyl cellulose has been successfully used in the flotation industry for many years. It is used as an inhibitor of pyroxene, hornblende, serpentine, chlorite, carbonaceous shale and other minerals containing calcium and magnesium. Practice has proved that , the carboxyl anion in carboxymethyl cellulose can electrostatically attract the cations on the surface of the mineral lattice, and the hydroxyl group in the carboxymethyl cellulose molecule and water form a water film through hydrogen bonding, thus playing an inhibitory role.