Agglomeration of gypsum, limestone, or gypsum-limestone mix

Details Agglomeration of gypsum, limestone, or gypsum-limestone mix Agglomeration of gypsum, limestone, or gypsum-limestone mix

1989-07-31

1990-09-04

Straub, Gary P.

Chemistry: physical processes

Physical processes

Agglomerating

23313P, 71 63, 71 6405, 106774, 106773, 106784, 423555, C05G 500, C05D 302, B01J 200

Patent

active

049541340

ABSTRACT:
An improved process for economically and effectively granulating solid, finely-divided, particulate feedstock comprising phosphogypsum, limestone, or mixtures comprising sulfogypsum, natural or mineral gypsum, or mixtures thereof and limestone and having from about 80 to 95 percent by weight of such sulfogypsum/mineral gypsum to effect products which exhibit excellent physical and chemical properties relative to dustiness, storage, handling, and perhaps most importantly, aqueous media-induced rapidity of reversion to a mesh-size distribution of particles substantially similar to the initial size distribution of said feedstock, which improved process involves introducing such relatively finely-divided feedstock, together with material comprising recycle thereof into a suitable agglomeration device, such as a rotary drum, and therein effecting agglomeration/granulation of such feedstock in the presence of aqueous media, the improvement comprising the utilization, in combination with said aqueous media, of relatively small portions of a newly discovered granulation/dispersion aid comprising dilute lignosulfonate solution.

REFERENCES:
patent: 3214261 (1965-10-01), Galloway
patent: 3660068 (1972-05-01), Wilson
patent: 4277253 (1981-07-01), Walter
patent: 4743289 (1988-05-01), Miekus et al.
patent: 4832728 (1989-05-01), Allan et al.
patent: 4846871 (1989-07-01), Detroit
Browning, Jon. E., Agglomeration, Grounding Larser in Application & Technology, Chemical Engineering, Dec. 1967, pp. 147-170.

Affiliated with

Also associated with

Rating

Agglomeration of gypsum, limestone, or gypsum-limestone mix does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Agglomeration of gypsum, limestone, or gypsum-limestone mix, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Agglomeration of gypsum, limestone, or gypsum-limestone mix will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-439080