Document DDmvDmovL5J4D2Q1Y4mY86wKB
Cyprus In du stria l M inerals Com pany
Interoffice Correspondence
To From
E.P. Tiritas E.H. Reade
Date
July 5, 1989
Subjeci AUR Resources Talc
The AUR Resources talc sample categorized by P. Colville does not warrant further study and Resource Development will consider this a dead project unless you direct otherwise.
EHR/msw ce: R.J. Buettner
E. McCarthy
E.H. Reade
ITA-Ratcliff-000046
ITA-Ratcliff-000047
luir
J r RESOURCES INC
130 M a l*id S l a t Wail
Suita 3202 Toronto. Ontario MSH 3PS 16 2-28 14
MX(416!36?-CM>?
FAX: (416) 367-427
TELECOPIER INFORMATION SHEET
DATE: TO: COMPANY:. TELECOPIER HO.: FROM; COMPANY: NUMBER OF PAGES COMMENTS:
May 24. 1989 '"
-v
Cyprus In d u srria l Minerals Co.
303-643-5168
Howard R. Stcckford
Aur Resources Inc.
15 (in clu d in g c o v e r sh e e t)
* J h * * } * * * tAAMuf
K fQ f^ c u i^
X
It i'1x5o(*<#u^A ., dit* C A z r n t <%o
Should any transmission or reception problems occur c a ll (416) 362-2614.
ITA-Ratcliff-000048
Jt
:^W PRELIMINARY TALC FLOTATION STUDY FROM CYANIDATION TAILINGS
By
\ i ' .,' '-.'
Final; Report May 8,1989
v*iI
.T ITA-Ratcliff-000049
Ministre de 1'nergie et des Ressources CENTRE DE RECHERCHES MINRALES
Complexe Scientifique
2700, rue Einstein SAINTE-FOY (Qubec)
GIP 3W8
AUR RESOURCES INC.
PROJECT 89LI01 PRELIMINARY TALC FLOTATION STUDY
FROM CYANI0ATION TAILINGS
FINAL REPORT May 8, 1989
COPIE NO: 2j
ITA-Ratcliff-000050
.! 1 i
To the attention of:
. Mr, Len 0'Gorman Manager Aur. Resources Inc,
.8.G. 105-3 R.R. No, 2 VAL-O'OR (Quebec)
. J9P 4N7
Prepared by
Smi Tremblay, P, Eng,
Head Metallic Ores Division
c-;gnaiure: 1
Approved by:
Jean Gobei1, P. Eng, Head of Service Metallurgical Research Laboratory
Signature
Date: May 8, 1989
ITA-Ratcliff-000051
ABSTRACT We describe the preliminary talc flotation tests from the com pany s cyamdatton tailings. It is possible to produce a concentrate assaying 99% talc + chlorite C<51 chlorite) at a recovery of 9 7 . 535,
ITA-Ratcliff-000052
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11
TABLE OF CONTENTS
ABSTRACT
Page
TABLE OF CONTENTS ...................................... .......... fj
LIST Of TABLES
m
1. INTRODUCTION
2. CONCLUSIONS
.. 1
3. RECOMMENDATIONS ............................................. 2
4. APPARATUS ANO EXPERIMENTAL PROCEDURES ....................... 3
5. RESULTS ,...................... ....... ................. 3 6. DISCUSSION OF RESULTS
?. ACKNOWLEDGEMENTS ............................................ 8
!
ITA-Ratcliff-000053
LIST OF TABLES
Ill
TABLE I:
Preliminary Mineralogies; Examination Polarized Transmitted Light Microscooe ........
Page
^
TABLE II: Conditions and Results: Test 6 ..........
*;
TABLE III: Conditions and Results: Test 18 ................
ITA-Ratcliff-000054
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W Lw
r , i ij
1
1, INTRODUCTION
wing:
Mr. Andre Tardif, consulting engineer, requested the follo
1) Preliminary testwork to determine If this talc can be floated,
2) Development of a flowsheet. ' 3) Pilot planting the developped flowsheet.
This study encompasses phase 1 only,
2. CONCLUSIONS
We can obtain a talc + chlorite flotation concentrate suitable for the market from both samples. On the first sample the best possible results might give a 99% talc + chlorite concentrate at 97.5% recovery. The calculated head was 28,51 talc + chlorite.
If required, a talc concentrate assaying 99% talc + chlorite with less than 5% chlorite can be produced. A closed-circuit flotation
test would be required to determine the talc recovery which could be
obtained in order to float such a product.
The second sample floated just as well as the first sample. The products were not examined under the microscope but the grade of
talc + chlorite 1n the feed appear higher than the first. The tailing contains about 101 chlorite which is coarse and speckled with rutile.
All assays are by microscopic examination. We die not deter
mine an analytical procedure for assaying the talc content of the flo tation products. The ore is far too complex to permit the usual methods
(L01 or Insolubles or X-Ray fluorescence). X-Ray diffraction identifies the minerals in a sample but not their contents.
ITA-Ratcliff-000055
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3, RECOMMENDATIONS Should any further testwork be required, the most pressing
requirement is the development of a pyroanalytica! procedure for as saying the various flotation products.
The talc content of this ore cannot be determined by loss on ignition because of the presence of carbonates (=50% C0t), and chlorite (18-27% H,0i. Nor can it be determined by acid insolubles because of
the presence of carbonates, chlorite, feldspar and quartz. From pre
vious experience we know that its determination by X-Ray fluorescence
weaves a ict to be desired. This is possible when the gangue consists
only of carbonates.
This is only a prel iminary study to see if the talc can be floated. The development of an optimized flowsheet will require much more work.
ITA-Ratcliff-000056
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4, APPARATUS AiO EXPERIMENTAL PROCEDURES
3
_ The first SQniP*e received April 12, 1989 consisted of two
P3ils each contain]eg a plastic bag of very wet tailings. We dried the
contents of one pail and split it Into 250 g lots. There were 14.5 g
dry. his sample was used in tests 1 to 18 inclusive, A preliminary mineralogical examination showed the mineral composition in Table I,
The second sample received April 28, 1S89 consisted of two
small bags of filter cake. We used 300 g of the wet cake in test 19 to see ir the flotation response would be the same as the first sample.
All flotation tests were done with a Denver 0-1 Laboratory
flotation cell. The water used was demineralized. Analyses were done
by rough microscopic counting.
5. RESULTS
Table I presents the mineral composition of the first sample
per a preliminary examination under a polarized transmitted light mi croscope.
m Fable II we find the conditions and results of test 6. able III shows the conditions and results of test 18,
ITA-Ratcliff-000057
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TABLE I
Preliminary Mineralogies! Examination Polarized Transmltted Light Microscope
Sample 1
Mineral
Chlorite (clinocnlore)
, Talc
I plagioclase feldspars
| Cal cite + dolomite ; Opaque minerals
| Quartz
| Mica
Amphibole j Other minerals
%
25 20 30 14
5 4 2
<1
<1
Talc: greyish green; w i l l have low brightness
ITA-Ratcliff-000058
TABLE II
Conditions and Results Test 6; First Tailing Sample
C on d ition s
R rK S o lid s, g
C ell v o lu ae, 1
T im e, a in .
\ .P .h . .. ..
R eagen ts
C a l g a n 0. 11, m l A r q u a d 2C - 75, 11, m l M I 8C p u r e , d r o p s
Cond. Rougher
Scav. 1 Scav. 2 Scav. 3 C lean er l
n c a 1100 250 2.5 2.5 2 10 N a t u r a l 9.3
1100
2.5 3
1100
2.5 5
1100
2.5 2
900
l .25 7
12.5 2.25 3
^1 1
l
1 1
; i
1k
i j
C l. Scav.
900
C lean er 2
AB
900 900
l . 25 8
1.25 5
1- 25j 5;
; I
!1
i]
!
Product Sc. tl. 3 Sc. Cl. Cone. Sc Cl * Tails Cl * Cone# 2A Cl. Cone, 28 Cl. tl. 2
Results
-- Weight, s
199.1
-- - -.. ........... 1 Microscope Observation
11.3 25.7
5,0 2.9
j
f | 141 talc, 51 chlorite, 11 other
3.6
ITA-Ratcliff-000059
in 1 w ~
O S 4.*-* ` - t o r f u f ^ i t , L D V U I \ W L . J i l I U t i U
I
i 4, o.-" - w`
Conditions RrH Sol les, g Cell va lune, ! Time, min, pH Reagents Tylose IX, nl 2C-75 IX, r.l HTnn pure, crops Calgon 0.`!4, al
TABLE III
Conditions and Results Isst 13; first Tailing Sample
Cond. Rougher neo 1100 250
r 2.5 2.5 2.0 11.5 Maturai 9.3 1
5.C
2.25
I
i4 j-
Scav. 1 Scav. 2 Scav. 3 Cleaner
11C0 1100 11C0
100-3
2.S 2.5 2.5 1.25 3.5 6.5 4.0 8.0
2.5 2.25 3j
2.5
2.25 t ;
2.5 2.25
I
1 !
0.75 J
flowsheet
Cl eaner" Tails
Cleaner j-- j Rougher -->j Scavenger 1
w Concentrate
1
Sc, Cone. 1
Scavenger 2 i-- ; Scavenger 2
... 1...... Sc. Cere, 2
T~ Sc. Cone.
Tails
1
Scavenger Cone, 1 Scavenger Cane. 2 Scavenger Cone, 3 Scavenger Tails Cleaner Cone. Cleaner Tails Calculated Head
Detailed Metallurgical Balance
Weight, X Analysis, Talc + Chlorite, X - Dist., X
5.1 15.6
7.5 87 22.9
20.7 25 18.1
50.8
I 1.8
7.3 :
a.{
39 55
25.2 16.4
100. c
28.6
1C0.
Best Possible Overall Metallurgical Balance *
Final Concentrate Final Tailing Calculated Head
W eight,
28.2 71.8 100.0
Analysis, Talc + Chlcrlts. X 99.0
j 1.0 23.6
Dist., X 97.5 2,5
100.0
Canposlts a'l recyclage products and dividing between concentrati or ti[11 ITA-Ratcliff-000060
I, DISCUSSION OF RESULTS
The talc In these tailings does not float as easily as a nor
mal talc ore. With a normal talc ore the density of the pulp to be
Hosted is always very low at 51 to 15% solids. A good portion of the
talc is very hydrophobic and floats with air only. After this stage a
frother is added which floats another portion fuel oil finish the float.
Finally additions of
This procedure was followed unsuccessfully with this tailing
sample in test l r 2, 3 and 4. Additic
slimes and raise the pH aid not help, the pH lowered with H.SO, to no avail.
of Calgon In
in test 4
st 3 to dispe*rse* 1 1 1 was used and
In test 5 we used a coco based quaternary amine collector,
Arquad 2C-75, and MI8C frother/ The talc floated well but slowly as
w u h most otner talc ores. A little collector is added followed by a
Tloat u n Ul che frott is empty. More collector is added followed by a
float until extinction of talc /n the froth and so on. As this conti nues more and more chlorite floats with ci Lai
The conditions, flowsheet and resul
are given in
Concentrate 2A contained 9 talc and 5% chlorite but the talc recovery
In test 7 to 12 inclusive we were attempting to float talc
fl]y by use of more selective collectors, different frothers and HF.
he tested collectors -were Arquad 2HT-75 and Arquad 1Z-75 whie; .ow and dodeeyl based quaternary amines respectively, (he frothers were p^Re 011 ano c/'osyiic ac1d- The rougher froth was always whitish green dt first turning to darker green towards the end of the float. This
indicated that talc (greyish green in this tailing) floated faster than the chio n te (green).
ITA-Ratcliff-000061
8
The Ontario and Quebec talc producers market a talc product
containing chlorite either as the mineral or as part of the talc molecu
le, We contacted Mr, A. Tardif as to the necessity of removing the
chlorite from this talc. We were advised to forget the chlorite for now.
In tests 13 to 18 we developped a suitable flowsheet. A Hoechst product Tylose CR-70CN a methyl cellulose, is used in the
roughing and scavenging steps to depress the carbonates while Galgn
sodium hexametaphosphate, is used in the cleaner to depress silica and
feldspar. The conditions and results are given inTable III. Under the best conditions we might produce a 991 talc + chlorite (<5% chlorite) at
a recovery of 97.5%. '
In test 19 we floated 300 g wet filter cake of the second sam ple under the same conditions as test 18. Two more scavengers were re
quired before extinction of talc + chlorite in the froth. The results are similar to test 18 except that the talc itself had finished floating by scavenger 4, Scavenger 5 concentrate contained about 25% talc +
chlorite, but this was about 901 chlorite. Scavenger 5 tails contained about 101 chlorite and no talc. This chlorite was very coarse and gene
rally speckled with rutile. The talc in the cleaner concentrate was much coarser and more fibrous than the first sample. The talc + chlori
te assayed about 98% with about 71 chlorite. Me did not examine all the
products but It seems that there was more talc and chlorite inthis sam
ple than in the first. The natural pH of the pulp was 11.0.
?. ACKNOWLEDGEMENTS
Mrs. Diane Gagn Gilbert performed the lasts. Mineralogical analyses were made by the Direction de 1'ana lyse minerale. The assis tance of the secretariat office is also acknowledged.
ITA-Ratcliff-000062