Document oeq6m5DrYBZV8OMDyXdQgGYzR
TE^hntcal service report
^THP FVATiHATtON,
-par iii-birnjT
for Boise Cascade Corporation
Salem, Oregon September 5, 1968
by G. L. Dickson
Group Manager - W, L, Carrick Project No. 443-Nil September 24, 1968
UNION CARBIDE CORPORATION Chemicals 6 Plastics
Research and Development Department Niagara Falls, New York 14302
A17 21 c
SUBJECT
This report covers the evaluation of High Purity Asbestos by Boise Cascade on September 5-6, 1968, The objective of this machine trial was to evaluate asbestos as a filler retention aid and as a partial replacement for the titanium dioxide extender (Hi-Sil) which is normally present in their furnish,
TRIAL RESULTS
The results of this evaluation have indicated that High Purity Asbestos can be successfully substituted for a major portion of the titanium dioxide extender normally used in this mill's furnish. Retention, improved significantly by the addition of about 2% asbestos to the furnish, is summarized in the following:
Single-Pass Retention
Without Asbestos
With Asbestos
Total solids Ash Titanium dioxide High Purity Asbestos
52% 14 13
-
66% 27 26 33
The effectiveness of High Purity Asbestos as a replacement for Hi-Sil and as a retention aid is also reflected by the reduction in filler costs as contained in the following schedule:
(Based on 4,000 lb. Mix Cells)
1o Without High Purity Asbestos
250 lb, Hi-Sil e 7,54/lb, 450 lb. Clay @ 2,04/lb,
Total
With High Purity Asbestos
50 lb, Hi-Sil e 7,54/lb,
350 lb. Clay
2,04/lb,
160 lb, Asbestos @ 6,64/lb,
Total
3, Filler Savings
Per 4,000 lb, Mix cell or, per ton of furnish
$18,75 9,00
$27.75
$ 3.75 7,00
10,56 $21,31
$ 6,44 S 3.^
During the pre-trial period preceding the addition of asbestos
to the furnish, it was necessary to add 7 lb. of titanium dioxide per minute in order to maintain the required optical specifications. The amount required during the latter portion of the trial was 5.5 lb, per minute or a saving of $0.33 per minute (1.5 x $0,22). Thus, the reduction in TiO? consumption reflects an additional saving of $19.80 per hour or about $4.40 per ton of production.
DISCUSSION
High Purity Asbestos was evaluated in a 50-lb, white offset furnish following an extended production period in which their normal
furnish was utilized. The following schedule contains the various changes in filler addition during the several trial periods,(Based on 4,000 1b. of furnish)
--Pr-e-----T---r--i-a--l-
r_---A--s--b--e--s-t-o2s-----T---r-i--a--l---- 7
Hi-Sil
Clay Asbestos Total
250 450
0 700
100 100
50
450 350 350
120 120 160
670 570 560
During the pre-trial control period, it was necessary to add 7 pounds per minute of titanium dioxide (3-1/2 gal./min, @ 2 lb,/gal.) in order to maintain the required brightness and opacity specifications. Although this was reduced to 4 pounds per minute at one point in the trial, the final Ti02 addition level approximated 5,5 lb,/minute. No operational problems or machine breaks were encountered, and quality production was maintained throughout the trial. Filler retention, based on wet-end samples obtained at that time, increased significantly. The attached tables (I-V) contain the analytical and calculated retention data covering these samples, The attached Mill Trial Data Sheets contain more complete information on furnish and machine operational data in effect during the trial,
CONCLUSIONS
The results of this evaluation have shown that High Purity Asbestos can be utilized as a retention aid and replacement for Hi-Sil in this mill's furnish. Although the exact savings made possible at this time by the substitution of asbestos for Hi-Sil are difficult to calculate, because of the complexity of their stock preparation system (refer Figure 1), it approximated $6.00 per ton of production, or $27,00/hour.
-2-
A 1 72 1 2
The decrease in tray water solids, from 0,43% during the control period to 0,23 during the trial, also indicates the improvement in filler retention which can be obtained. G. L. Dickson/bsn
-3-
A 172 1 3
TABLE I Jordan Samples Analyses
Time Sampled
7:45 3 * in c
8:50 9:50 11:00
a:nu it
1:20
3:00 4:30 5 50
M
it it
Average
% Ash
16.35
17.23 17.23 16.66 15.76 14.98 14.68 14.05 15.80
% TiO?
2.99
3.18 3.21 3.06 2.73 2.24 2.01 1.63 2.58
% Asbestos
0
0.48 0,82 1.28 1.88 1.92 2.08 2.12 1.51
TABLE II Headbox Analvses
Time Sampled
7:45 am,
8:50 a,m,
9:50 11:00
ft If
1:20 3:00 4:30
5:50
p,flm. tf fl
Average
% Consistency
0.880
0.854 0.814 0.772 0,729 0.686 0.667 0.676 0.743
% Ash
37,37
37.92 36.09 33.70 30.18 26.09 25.80 25.27 30.72
% TiO,
11.79
11.93 12,02 10,50
8.25 6.53 6.19 5.64 8.72
% Asbestos
0
0,48 1,32 2-00 2,52 2,68 2.80 2,88 2,10
A 172 1 4
TABLE III Tray Water Analyses
Tine Sampled
7:45
8:50 A o e 9:50 tt 11:00 tl 1:20 p.m, 3:00 ft 4:30 If 5:50 tt Average
% Consistency
0.427
0.427 0.385 0.361 0.297 0.240 0.241 0.228 0.311
% Ash
66.11
64.85 63.55 60.16 59,13 55.09 54.04 54.39 58,74
% TiO,
21.20
21.39 21.41 19.21 16.43 13.03 12.79 12.38 16.66
Time Sampled
7:30 a.m. 8:20 " Average
9:20 a.m. 10:20 " 11:20 " 12:15 p.m.
1:30 " 4:15 " 5:15 " 6:15 " Average
TABLE IV Reel Samples Analyses
Set No,
23-24 25-26
27-28 29-30 31-32 33-34 34-35 40-41 42-43 44-45
-
1 Ash
12.58 13.03 12.80
13.65 13.79 14.08 12.48 12.97 12.24 12.20 12.24 12.96
% TiO,
3.80 4.10 3.95
4.42 3.92 4.18 3.61 3.46 2.78 2.80 2.60 3,47
% Asbestos
0
0.56 2.08 2.92 4.52 5.16 5.40 5,72 3,77
% Asbestos
0 0 0
0.44 0.84 1.00 1,04 1.28 1.56 1.60 1.64 1.18
A 1 72 1 b
Time
7; 45 A o m o
8:50 SoRIq 9;50 If 11:00 ff 1:20 p o ni o 3:00 ft 4:30 ft 5:50 it Average
TABLE V
Calculated Filler Retention CSingle F^ass Retention)
l-(Conc,Tray Water/Conc-Headbox) x 100
1 Ash
14,2
14,5 16,7 16,5 20,2 26,1 24.3 27,4 20,8
1 TiO,
12,8
10,4 15.8 14,5 18.9 30.2 25,4 26.0 20,2
1 Asbestos
-
41,7 25,5 31,7 26.9 32,7 30,3 33,0 31,6
1 Total Solids
51,5
50,0 52,7 53,2 59,3 65,0 63,9 66,3 58,2
A 172 1 6
UNION CARBIDE CORPORATION
MINING & METALS DIVISION
MILL TRIAL DATA SHEET
I. COMPANY LOCATION AND DATE OF TBiAiBoise Cascade Corp. , Salcm_, Ore. 9/5/68 II. company representatives and TiTtPs Newell Emery, Technical Director----------
Kermit Burson, Assistant Beaterroom Superintendent, Tom La Haise, Chief Chemist
III. UCC representatives Robert T. Larkin and Gordon L. Dickson
IV. TRIAL OBJECTIVES (in order of important)Evaluation of High Purity Asbestos as a Retention Aid and Replacement for Hi-Sil
V. PRODUCT IDENTIFICATION
Type of Product___White offsetCoated ^Jj^No
Grade Nnm.
DSGA White Government offset
Basis Weight50 lb. (25x38-500]
Daily Production___110 tons Ih/hnur 9(0Q0
Total Daily Production of Mill2 00- 2 40 tons
(Tissue and Board) No. of Plys:
VI. MACHINE DESCRIPTION
Type of Mnrhin* Fourdrinier, pressurized headbox, Dandy roll
Machine No-------------i(Cylinder) No. of Cylinders"
Machine Speed-- FPM____ (Tissue) Reel SpeedZ (Tissue) % Crepe------------ 'Wire Mesh75/56
Wire Width--------- 156 inchesMachine Trimi^rVi***
Size Press Vertical--(9-10%)Calenders (Tapioca Starch)
Single 6 5 nips
1
A 17 2 1 7
VII. AUXILIARY EQUIPMENT
ItflMfl
Ttp
Leading (amp.)
Saveall (Type)___Dis -(jPSfigjFlow Rato.
VIII. STOCK PREPARATION Continuous or Batch Type Beater and Capacity_________ No. of Beater Chests and Capacity. Machine Chest Capacity____________________ Stock Freeness (Mach. Chest and Stuff Box). Headbox Consistency_______^ __________
Makeup pH_______________________ IX. FURNISH MAKEUP* Basis (Ib./ton, etc.).
Furnish Constituent
____ Machine pH
4,000 lb. Mix cell___________________ % Pre-trial pTM* Trial
Bleached softwood sulfite
70
Broke__________________
____ id
Clav______________________
________
450
450-350
Hi-Sil 4flj____________
_______
250
100-50
High Purity Ashestos
_______
__________ L2LlL60
Rnsin Size____________
_______
_18____________________1B_
Alum____________________
Titanium Di-ox ide-- Cato 15**_____________
_______
---------_______
fxSL-JA______________36-50
CPM 7-5-1/7 CPM
200 GPH
200 GPH
Tinting Dyes (Three)
_______
Unchanged during pre-trial 6 tri
periods
*Ti02 added to fan pump in slurry form 2 lb./gal.
* For beard systems include furnish for each medium - lepliner, u-derllner, filler, and backliner.
** Cato 15 added to fan pump (0.2 lb./gal. or 40 lb./hr.)
Note: Unknown amount of Nalco 633H added to headbox. Addition level
remained unchanged during trial.
A17? "
X ASBESTOS ADDITION - Pellet Repulper (Type). None
Asbestos firnH, High Purity Opened
int No6599-1
Point of Addition_______ Mix Cell_______________________________
Pounds of Asbestos Addedper ton BDPper beater
per hour
Per cent asbestos addition on BDP______________;__________________________
XI. SUPPLEMENTARY INFORMATION
Quality Control Data Record
Stock Prep. Log
Sampling (in order of importance)
Fifth 1 liMtot Trial!
eReel
Board Trials
Tray Water
Tltsoo and Tawol
Stuff box
*Stuff box (Jordan)
Vat
Reel
*Headbox
Stuff box
Headbox
*Tray
Reel
Saveail effluent
Saveall effluent
Saveall influent
Saveall influent
Identify samples by name, date, time
Wet samples should approximate 500 ml.
Weight of BD filter pad is required for all vat, tray, and saveall samples.
3
A1 7219
XII. TRIAL LOG (Comments including changes in furnish and operating conditions)
9/4/68 9/5/68
Tim.
- _ Cwwmh
4:30 p.m. Pre-trial control initiated. 250 lb. Hi-Sil 404 added to blend chest. Titanium dioxide addition ranged from 5 to 7 lb. per minute.
8:10 a.m. 160 lb. High Purity Asbestos added to mix chest. In error. Intended amount was 120 lb. Hi-Sil addition decreased by 150 lb.
9:00 a.m. 12.0 lb. High Purity Asbestos added to blend chest. Hi-Sil addition maintained at 100 lb.
11:00 "
Clay reduced from 450 lb. per mix chest to 350 lb. Titanium dioxide reduced from 7 lb. per minute to 5 lb.
per minute.
2:50 p.m. Titanium dioxide reduced to 4 lb. per minute.
9/6/68
High Purity Asbestos increased to 160 lb., Hi-Sil reduced to 50 lb., titanium dioxide increased to 5.5 lb. per minute.
Recorded Witnessed and Understood by.
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A 1722 1
DISTRIBUTION LIST
Messrs. B. K. Barton L. D. Berger
W. L. Carrlck
F. D. Dexter/ N. J. Setter G. L. Dickson
B. D. Dobbs T. Dougherty T. J. Hall P. G. Horecka
G. E. Kuehn R. T. Larkin J. K. Marshall J. S. McReynolds R. A. Miller G. J. Norberg E. J. O'Keeffe T. R. Orme
A. E. Pufahl (2) J. A. Riddle/^^ J. L. Myers H. B. Rhodes
R. T. Scott
J. Sidlovsky J. H. Stevens F. H. Thompson
R. M. Tong
J. F. Volt F. J. Welch Miss. J. Ulrey
Chicago New York
Bound Brook New York New York Niagara Falls Cincinnati New York Brussels, Belgium Chicago
Detroit Seattle Charlotte Houston
Atlanta Charlotte Dallas Los Angeles
New York
King City King City Niagara Falls Detroit
New York New York Niagara Falls New York
New York South Charleston Bound Brook
*17222
- i'&p
Mr. R. T. Larkin Chemicals Plastics Union Carbide Corporation 4726 Rainier Ave. South Seattle, Wash. 98118
See Attached Distribution
DISTRIBUTION
I A DHJ|r
Q
L. F. Crew
R. O. V jr:fen 0
V.\ E. Hoiijople 0
A. A. Andrade 0
G. C. B'ice Shifters
September 25, 1968
If5?
K. A. Wood
D. S. Kamens G. Vessels K. West File
Boise Cascade Corp Salem, Oregon High Purity Asbestos Trial
The attached report covers the evaluation of High Purity Asbestos at subject mill on September 5, From all indications, it appears to have been a very successful trial. The use of asbestos as a partial replacement for HiSil 404 saved them about $6.00 per ton of paper.
It's difficult to determine the exact amount because of the way their pigments and broke are added to the furnish. But $6,00 a ton saving is a good approximation. The increase in retention was also quite significant, and the last tray water sample obtained during the trial showed that the solids were still decreasing.
GLD/bsn Attach.
G. L. Dickson
A 17209