FEASIBILITY OF USING X-RAY-DIFFRACTION FOR ONLINE ANALYSIS OF GYPSUM DURING WALL BOARD MANUFACTURING

Citation
Ga. Norton et al., FEASIBILITY OF USING X-RAY-DIFFRACTION FOR ONLINE ANALYSIS OF GYPSUM DURING WALL BOARD MANUFACTURING, Minerals engineering, 8(9), 1995, pp. 1069-1074
Citations number
NO
Categorie Soggetti
Engineering, Chemical","Mining & Mineral Processing",Mineralogy
Journal title
ISSN journal
08926875
Volume
8
Issue
9
Year of publication
1995
Pages
1069 - 1074
Database
ISI
SICI code
0892-6875(1995)8:9<1069:FOUXFO>2.0.ZU;2-F
Abstract
A preliminary study was conducted to determine the feasibility of deve loping an on-line x-ray diffraction (XRD) monitor to determine gypsum during wall board manufacturing. Samples of bassanite (CaSO4 . 1/2H(2) O) containing 0, 1, 3, and 5% gypsum (CaSO4 . 2H(2)O) were analyzed in the laboratory using an experimental on-line XRD monitor and a conven tional x-ray diffractometer. Results of this study indicate that the d evelopment of a gypsum monitor is technically feasible. When sample pa cking was used, gypsum was detected in all of the samples containing a dded gypsum and the sensitivity was adequate to differentiate between each of the gypsum concentrations. Without sample packing, 1% gypsum c ould not be detected under the analytical conditions employed. The pre cision was reasonably good for these exploratory tests, with relative standard deviations ranging from 10-30%. Precision can probably be imp roved through instrument modifications. Once developed an on-line gyps um monitor is anticipated to cost on the order of $75,000.