Process for purifying silica sand

Details Process for purifying silica sand Process for purifying silica sand

1981-12-21

1983-08-30

Vertiz, O. R.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423131, 423132, 423150, 106DIG8, C01B 3312

Patent

active

044016387

ABSTRACT:
A process of purifying silica sand comprises grinding sandstone, washing and desliming the ground sandstone to remove the major part of the clay-type binder, attrition-scrubbing the deslimed sand particles to release further amounts of binder therefrom, washing and desliming to remove said binder, drying and heating the sand particles, treating the hot sand with sulfuric acid to convert the iron oxides, ferrosilicates and ferro-aluminous impurities into water soluble compounds, attrition-scrubbing the hot suspension of the chemically treated sand to release the strongly adhering stains of said impurities, washing with cold water and desliming, conditioning the sand suspension with fatty acids or petroleum sulfonate collectors, a polyalcohol frothing agent and, if necessary, a mineral acid to bring the pH to from 1.5 to 7.0, carrying out a first froth-flotation to remove the remaining ferrosilicates and iron oxides, and carrying out a second froth-flotation with a fatty amine collector in the presence of sulfuric acid and/or hydrofluoric acid to activate the aluminosilicates and to remove the same at a pH of from 1.5 to 3.5.

REFERENCES:
patent: 1957579 (1931-12-01), Carew
patent: 2409665 (1946-10-01), Cole et al.
patent: 2423022 (1944-04-01), Herkenhoff
patent: 2769540 (1956-11-01), Brown
patent: 3503705 (1970-03-01), Tackett
Dasher, John et al., "New Methods of Purifying Glass Sands" The Bulletin of the American Ceramic Society, vol. 20, No. 6, Jun. 1941, pp. 187-195.
Messner, William E., "Scrubbing Solves Sand Floatation Problem" Mining Engineering, vol. 7, No. 2, pp. 138-139, Feb. 1955.

Affiliated with

Also associated with

Rating

Process for purifying silica sand does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for purifying silica sand, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for purifying silica sand will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-905478