Document LpjVqmgDpgLnZx2GXNjn0Jqz
Bv * 1 DU. -PONT DE NEMOURS & COMPANY
CC: M, Hunt/B. Goniek W, -S-. Struve/A.A. Briszolara
: l-,-i-4arsb.s,ll
J* E. Waller H. H. Gyorgy (2) J. . Minnich File
ilm. Newark
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Edge ii Moor
Newport Tl
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Newport ^ Delaware April 12, IS66
"AFFLAIR" - NEWPORT
XOA-6
TITLE: Hydrolysis of HF,-128-D .
PURPOSE: This hatch of improved gold Is Being prepared for initial
sales evaluation of this grade, ('ae/srftoc
t>5*H)
NUMBER OF TEST LOTS: One
.,
. STARTING DATE: April 13> 1966
PROCEDURE:
The batch size is to be reduced from a normal mica charge of 5^300 lbs. to one of 35,500 lbs. because of availability of the preclassified,mica,! Batch quantities a.re adjusted downward to compensate for this reduction. The filter
presses must be stumped at a total of 64 frames instead of the normal 96. it is suggested that each press be stumped at '32 frames.
Operation is to follow the attached batch- card. Addition of Ti02 concentrate to hydrolysis should be delayed until approximately 0930 and should be made under the direction
of E. P. Klenke. Duration of the boil will be determined by Mr. Klenlce. All other 'operations will proceed as in a
normal batch'of NF-103.
SAFETY: No unusual operating hazards 'are involved,
DISPOSITION OF PRODUCT:
The wet press; cake will be discharged Into * 55 gallon drums and stored until research tests determine its further processing. Research per
sonnel will sample wet cake as required. Residual
42# of mica rejects should be -retained for reference
. RESPONSIBILITY FOR CLOSING REPORT: E. F. Klenke APPROVALS:
Researan Sulfervlsor
Production Supervisor
j /Batch No. '
* S5?g,a;sgLrw y
i: iisy:
Step By
Grade No.
-r-w :.jj. :?;;:* ?
1 Add water to hydro tank.
DateM.,T.
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-------- - *--;-}-r-r--r1-:
Inches
Process Pounds
y&i
Gallons
Ho *7
Temp.
2 Add mica to water in hydro tank. Stir briefly after each 5 bags.
Type
N W No.
No. Bags
*
- ut
/2fo(Vs,
/7ff \
V*
'/if-11*
- Ut T
/7 f*// tints,
noo ] ?.r>
J-
> S'/is.
r
13 i
i} 1 !4
\
!5
i 1 i !6 1 ----1
7
s
Fu^np Concentrate:. Take sample to Lab. at once.
% TiOa
Sp. Gr. -------- --- g/1 Reduction---------- i.
WhUe fcwaitiftg.analysis heat to 5$C,
Pump 78% HjSO( to Mix Tank.
Add Iron Powder To Concentrate in Head Tank. Sift in slowly. Allow No Burning or
Welding in Area.
Resample Concentrate 30 minutes after treatment g/I Reduction
Heat mica slurry to 53C. Time Ready------- --
Add Concentrate from Head Tank to Hydro Tank in /4?_--/A.--minutes. --\
Control temperature of Hydro Tank at 58C-62 CC.
'----
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3*
o
IV y*
' ...........
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I9
! -10
! 11 i-
i
j 02-
1 1 13 ! 14
Time Start Time End
.-------------
Add Sulphuric Acid To Hydro Tank.,,
Heat
Hydro
Slurry
to
boil
inirUr/ntriaU. Plot
---- temperature rise.
---------------- -------
Measure slurry depth.
V *r.
t d&fdr7/)t t "
]
--Add- SbAVoift in~otin 3 4 miautaar*
Fill Hydro Tank.with water. Record inches.
.
Send to No. 1 Press. Start ,,-- ----- .------- Full --;----------_
.
/cz.
a. v n'tJ--
J l
: jf i !
{ i
t 15
i \ 16
Measure slurry left. Stump No. 2 Press to suit. Send to No. 2 Starts------- FulL--.-----Wash presses till conductivity is 1500 Ohms or higher on filtrate.
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i Comments by Operators:
DUP050027077