Zimmer slipstream magnesium hydroxide recovery demonstration. Volume I of II. Final report, April 1, 1993--May 31, 1995 Page: 56 of 132
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I
E
Crystallizer
Mg(OH)2 Purity ____Gypsum Purity
Decreasing Crystallizer Tank Residence Time Decreasing Crystallizer Tank Residence Time
Gypsum Recycle to Crystallizer Gypsum Recycle to Crystallizer
80 GPM & 100 GPM & 120 GPM & 80 GPM & 100 GPM & 120 GPM &
7/6/94 to 4 Operating 5 Operating 6 Operating 716/94 to 4 Operating 5 Operating 6 Operating
7/13/94 Hydroclones Hydroclones Hydroclones 7113/94 Hydroclones Hydroclones Hydroclones
pH 3.25 Hours 2.6 Hours 2.17 Hours pH 3.25 Hours 2.6 Hours 2.17 Hours
10 29.8 29.8 28 10 59.8 58.7 61.6
10.5 28.7 28.9 30.7 10.5 61.6 61.4 60.7
10.8 29.4 26.5 29.9 10.8 58.5 60.2 63.8
Gypsum Recycle to Ox and Crystallizer Gypsum Recycle to Ox and Crystallizer
7/19/94 80 GPM & 100 GPM & 120 GPM & 7/19/94 80 GPM & 100 GPM & 120 GPM &
to 4 Operating 5 Operating 6 Operating to 4 Operating 5 Operating 6 Operating
7/21/94 Hydroclones Hydroclones Hydroclones 7/21/94 Hydroclones Hydroclones Hydroclones
pH 3.25 Hours 2.6 Hours 2.17 Hours pH 3.25 Hours 2.6 Hours 2.17 Hours
10 30.1 29.5 40.4 10 58.7 60 53.6
10.5 31.9 29.9 n/a 10.5 61.4 59 n/a
10.8 27 29.8 n/a 10.8 59 59.4 n/a
Gypsum Recycle to Crystallizer Gypsum Recycle to Crystallizer
80GPM& 100GPM& 120GPM& 80GPM& 100GPM& 120GPM&
7/27/94 4 Operating 5 Operating 6 Operating 7/27/94 4 Operating 5 Operating 6 Operating
to 8/3194 Hydroclones Hydroclones Hydroclones to 8/3194 Hydroclones Hydroclones Hydroclones
pH 3.25 Hours 2.6 Hours 2.17 Hours pH 3.25 Hours 2.6 Hours 2.17 Hours
10 29.6 22.2 29.3 10 59.3 68.3 59.5
10.5 28 26.7 28.3 10.5 62.2 62.7 61.6
10.8 28.1 25.9 n/a 10.8 62 65.9 n/a
No Gypsum Recycle No Gypsum Recycle
7/14/94 80 GPM & 100 GPM & 120 GPM & 7/14/94 80 GPM & 100 GPM & 120 GPM &
to 4 Operating 5 Operating 6 Operating to 4 Operating 5 Operating 6 Operating
7/18/94 Hydroclones Hydroclones Hydroclones 7/18/94 Hydroclones Hydroclones Hydroclones
pH 3.25 Hours 2.6 Hours 2.17 Hours pH 3.25 Hours 2.6 Hours 2.17 Hours
10 31.7 31 n/a 10 59.2 59.9 n/a
10.5 32.9 30 n/a 10.5 59 59.4 n/a
10.8 26.4 n/a n/a _ 10.8 52.9 n/a n/aTable 7. Summary of Purity Data for Testing Period
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Zimmer slipstream magnesium hydroxide recovery demonstration. Volume I of II. Final report, April 1, 1993--May 31, 1995, report, March 1, 1998; Columbus, Ohio. (https://digital.library.unt.edu/ark:/67531/metadc693041/m1/56/?rotate=270: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.