an investigation of the recovery of feldspar quartz & mica from
TRANSCRIPT
52A12NW0002 2 .4090 GOLDIE 010
An Investigation of: :
THE RECOVERY OF FELDSPAR. QUARTZ AND MICA
from pegmatite samples t
submitted by
STEEP ROCK IRON MINES LIMITED
Progress Report No. l
Project No. L.R. 2391*
NOTE:
This report refers to the samples as received.
The practice of this Company in issuing reports of this lature is to require the recipient not to publish the report or any part thereof without the written consent of Lakefield Research of Canada
LAKEFIELD RESEARCH OF CANADA LIMITED Lakefield, Ontario
March 9, 1981 ."
Mr. R. Bernatchez of Steep Rock Iron Mines Limited requested testwork on
the recovery of feldspar, quartz and mica from a pegmatite sample. The sample was
contained in tvo drums and was received on January 22, 1981 at Lakefield. A combined
flowsheet of screening, magnetic separation and flotation was to be used to produce
the three products.
On February 5, 1981, Mr. R. Bernatchez and Mr. G.E. Wood of Steep Rock
Iron Mines Limited visited Lakefield to discuss and direct the testwork.
LAKEFIELD RESEARCH OF CANADA LIMITED
D. M. Wyslouzil, P. Eng. ,
Manager
W. T. Yen, Ph. D.,
Senior Project Engineer
Investigation by: C. Garrett
"k Si02
# A1203
lo Fe 203
# CaO
1 MgO
# Na20
# K20
75-0
111. 6
0.60
0.6l
0.012
5.99
3.18
l U M M AE Y.
1. Head Sample
The chemical analyses of tvo composites are shown below:
West Composite East Composite
71*.6
lit.2
0.62
0.66
0.013
5.85
3.95
Total 99.992 99.893
The size range of the head sample was about 95 1* minus 20 mesh and about
73 1o retained on 100 mesh.
2. Testing Flowsheet
The ore sample as received was minus 8 inches. The complete testing flowsheet
included: 3 stages of crushing, l stage of screening, 2 stages of magnetic separation
and 2 stages of flotation.
The ore was fed to a Jaw Crusher with a discharge opening of 2 inches. The
minus 2 inch material was then passed through a cone crusher with a 1/U inch opening
and a roll crusher.
The discharge materials of the roll crusher was separated on a 20 mesh screen.
The oversize contained mainly muscovite. The size range of the mica was from 20 mesh to
about l inch, most of the mica flakes were in the range of 1/8" to 1/V. The mica was
considered to be of marketable quality.
- 3 -
iry - Continued
2. Testing Flowsheet - Cont'd
The 20 mesh undersize was fed to a High Intensity Dry Magnetic Separator.
The non-magnetic fraction was again treated at a higher flux density. The non-magentic
material was further processed by flotation.
Ore about 8"*
Jaw Crusher with 2" discharge openingV
Cone Crusher with 1/V discharge opening^
Roll Crusher with 20 mesh discharge opening
Mica
pH = 2.I+ with 300 g/t R825 50 g/t R801 50 g/t DF-250
1st Stage Lurgi High Intensity Magnetic Separator, 5 amperes
2nd Stage Lurgi High Intensity Magnetic Separator, 15 amperes
Ferromagnesian Minerals
Magnetic materials at 5 amp.
Magnetic materials at 15 amp.
pH = 1.8 with 1+7^0 g/t HF 250 g/t Armac C 50 g/t DF-250
Quartz
Feldspar
aary - Continued
2. Testing Flowsheet - Cont'd
A Denver D-l flotation cell was used in this investigation. The sample
was pulped to about 30 'fa solids. The pH of the pulp was lowered to about 2 .k by adding
concentrated sulphuric acid. Cyanamid reagents Aero Promoter 825 and 801 (300 g/t
and 50 g/t respectively) were used as collector for the ferromagnesian minerals and
50 g/t Dowfroth 250 was added as frother. After removing the ferromagnesian minerals,
the pulp was conditioned with 1+7^0 g/t hydroflouric acid (pulp pH 1.8) for five
minutes. About 250 g/t Armac C of Armak Chemicals was used to float the feldspar
from quartz.
The weight distributions of all products are shown below:
Weight # Products West Composite East Composite
+20 mesh mica 3.89 2.28
5 amp magnetic materials 9-3^ 9-12
15 amp magnetic materials 8.80 10.52
Ferromagnesian Minerals 1.82 1.39
Feldspar 35. 51* 32. lh
Quartz 1+0.61 1+3.95
Total 100.00 100.00
3. Chemical Analyses of Products
Four intermediate and final products: 20 mesh undersize, 15 .amp non
magnetic, quartz and feldspar, were prepared for complete analysis. The results
are summarized on the following page.
- 5 -
Summary - Continued
3. Chemical Analyses of Products - Cont'd
*fc Si02
1, A1 203
1, Fe 203
1* CaO
1, MgO
1, Na20
1, K20
# L.O.I.
Total
20 Mesh Undersize
West
74. 614.10.42
0.71
0.019
6.47
3.42
0.28
100.019
East
74.413.960.470.750.0246.522.990.35
99.464
15 amperes Non-magnetics
West
74.5
13.2
0.11
0.54
0.08
6.15
3.55-
98.13
East
76.112.3
0.15
0.54
0.12
6.09
3.11
-
98.41
Quartz
West
83.8
8.800.14
0.62
0.0184.802.31
0.19
100.678
East
82.6
9-23
0.14
0.65
0.018
5-01
2.26
0.20
100.108
Feldspar
West
68.5
17.8
0.10
0.610.011
8.14
4.30
0.24
99.701
East
68.2
18.1
0.13
0.68
0,014
8.57
3.76
0.29
99-744
4. Discussion and Recommendations
Using three stages of crushing and screening, a clean muscovite fraction
could be removed. In this investigation only one stage of screening was used. The
total weight of mica obtained about 3 # and the flakes were in the size range of 1/8
inch to l inch.
High intensity magnetic separation reduced the iron content of the samples
from 0.45 lo to 0.15 1* Fe203, but the weight lost to the magnetic fraction was almost
20 55 of the total weight. Better conditions may exist by which less quartz and
feldspar would be removed with the magnetics.
The separation of feldspar and quartz by flotation was not optimized.
Although the grade of feldspar was acceptable, the quartz fraction still contained some
feldspar.
- 6 -
Summary - Continued
' k. Discussion and Recommendations - Cont'd
Based on the above discussions, further investigations should be
conducted in the following manner:
1) Several stages pf screening should be inserted in the crushing flowsheet
to recover larger mica flakes.
2) Magnetic separation tests should be carried out in which the rotor speed -
flux density relationship is optimized.
3) Flotation of the ferromagnesian minerals should be tested before magnetic
separation to evaluate its effectiveness in lowering the iron content.
H) To establish the optimum conditions for the quartz-feldspar separation.
5) To examine the effect of different size distributions on the quality of
the end products.
- 7 -
SAMPLE PREPARATION
Two composite samples, representing the West and East portion of the
deposits, were received at Lakefield. Each sample vas reduced to about 2 inches
with a Jav Crusher. About 7/8 of the sample vas riffled out and stored. The
remaining 1/8 sample was crushed to minus 20 mesh with a cone crusher and a roll
crusher. The mica flakes were retained in the 20 mesh oversize. Head samples were
prepared for assay. About fifteen 2 kilogram charges were prepared from each
composite for testwork.
- 8 -
DETAILS OF TESTS
Testing Flovsheet
Ore
lJav Crusher 2" opening
Cone Crusher l A" opening
Roll Crusher
Oversize Mica
undersize
5 amp High Intensity Magnetic Separator
15 amp
magnetic
High Intensity Magnetic Separator
>magnetic
non-magnetic
R825 R801 DF250
Ferromagnesian Minerals pH 1.8
HF Armac C
^Quartz
Feldspar
- 9 -
Test No. l
Purpose:
Feed:
Equipment:
Procedure:
1. To remove coarse mica flakes by screening.2. To remove magnetic material by magnetic separation.
West composite sample roll-crushed to minus 20 mesh.
20 mesh screen.Lurgi High Intensity Magnetic Separator.
1. Using 20 mesh screen to remove coarse mica flakes (muscovite)2. Undersize fraction vas fed to magnetic separator vith current
to coils at 5 amperes and drum speed at 250 rpm.3. Non-magnetic fraction at 5 amperes was then separated at 15
amperes to produce magnetic and non-magnetic fractions.
Metallurgical Results - West
Product
+20 mesh (mica) -20 mesh, 5 amp magn -20 mesh, 15 amp magn -20 mesh, 15 amp non-magn
Head (Calculated)
Weight 1
3.89 9-31+ 8.80
77-97
100.00
Si02
7^.5
-
A1203
13.2
-
Assaj Fe203
0.11
-
'S, %
CaO
0.5^
-
MgO
0.08
-
Na20
6.15
-
K20
3.55
-
Total
98.13
-
- 10 -
t No. 2
Purpose:
Feed:
Equipment:
Procedure:
1. To remove coarse mica flakes by screening.2. To remove magnetic materials by magnetic separation.
East composite sample roll-crushed to minus 20 mesh.
20 mesh screen.Lurgi High Intensity Magnetic Separator.
1. Using 20 mesh screen to remove coarse mica flakes (muscovite)2. Undersize fraction vas fed to magnetic separator with current
to coils at 5 amperes and drum speed at 250 rpm.3. Non-magnetic fraction at 5 amperes was then separated at 15
amperes to produce magnetic and non-magnetic fractions.
Metallurgical Results - East
Product
+20 mesh (mica) -20 mesh, 5 amp magn -20 mesh, 15 amp magn -20 mesh, 15 amp non-magn
Head (Calculated)
Weight t
2.28 9-12
10.53 78.08
100.00
Si02
T6.1
-
A1203
12.3
-
Assay Fe203
0.15
-
s, # CaO
0.5U
-
MgO
0.12
-
Na20
6.09
-
K20
3.11
-
Total
98. itl
-
- 11 -
t No. 3
Purpose:
Procedure:
Feed:
Grind:
Conditions:
To remove ferromagnesian minerals and separation of feldspar-quartz.
De-mineralized vater was used in this flotation test. pH of pulp was brought to about 2. k with concentrated sulphuric acid. Ferromagnesian minerals were removed by R825 and R801. pH of pulp was further brought down to 1.8. Hydroflouric acid was used to depress quartz. Feldspar was floated with Armac C.
l kg non-magnetic fraction of Test No. l (West Composite).
Nil
Stage
Condition 12
Ferromagnesian Flot.Condition 3
ItFeldspar-Quart z-Sep ' n
Reagents Added, grams per tonne
HaSOa
1*000—-50,000--
R825
—
300—---
R801
mm
50----
HF
^—-
1+7^0--
Armac C
^—-—250-
DF250
•H
50—-
50-
Time, minutes
Cond.
5li—53-
Froth
— —
—
6-—6
PH
2.1*——
1.8—-
Flotation Cell Denver 500 gram D-l Speed rpm 1500
Metallurgical Results - West
Product
Feldspar Concentrate Quartz Concentrate Ferromagnesia Minerals
Head (Calculated)
Weight *
1^5.57 52.09 2.31*
100.00
Si02
68.5 83.2
-
A1203
17-8 8.8
-
f Fe 203
0.10 O.ll*
-
is s ay s CaO
0.6l 0.62
-
, 1*MgO
0.011 0.018
-
Na20
8.11* l*. 80
-
K20
l*.3l* 2.31
-
LOI
0.21*0.19
-
Total
99-7^1 100.0T8
-
- 12 ~
No.
Purpose :
Procedure :
Feed:
Grind:
Conditions :
To remove Ferromagnesian minerals and separation of feldspar-quartz.
Same as for Test No. 3.
l kg non-magnetic fraction of Test No. 2 (East Composite)
Nil
Stage
Condition 12
Ferromagnesian Flot.Condition 3
1*Feldspar- Quart z Sep'n
Reagents Added, grams per tonne
H2SOa
MOO--50,000--
R825
M
300----
R801
^ .
50--—-
HF
^--
1*7^0--
Armac C
——
' ——
250-
DF250
mf
50--
50-
Time, minutes
Cond.
5k-53-
Froth
—
-
6--6
pH
2.1*——1.8--
Flotation Cell Denver 500 gram D-l Speed rpm 1500
Metallurgical Results - East
Product
Feldspar Concentrate Quartz Concentrate Ferromagnesia Minerals
Head (Calculated)
Weight *
Ul.93 56.29 1.78
100.00
Si02
68.2 82.6
-
A12 03
18.1 9.23
-
Fe20s
0.13 O.lfc
-
Assaj CaO
0.68 0.65
-
'S, 1,
MgO
O.Olil 0.018
-
Na20
8.57 5.01
-
K20
3.76 2.26
-
LOI
0.29 0.20
-
Total
99.71*1* 100.108
-
- 13 -
Test Ho. l and 3
Metallurgical Results - West Composite
Product
+20 mesh mica5 amp magnetic15 amp magneticFeldspar concentrateQuartz concentrateFerromagnesia Minerals
Head (Calculated)
Weight
*
3.899-3**8.80
35.5440. 6l1.82
100.00
Assays, %
Si02
——-
68.583.2-
-
A1 203
——-
17-88.8-
-
Fe203
nm——0.100.14-
-
CaO
——-
0.610.62-
-
MgO
——-
0.0110.018-
-
Na20
^--
8.14It. 80-
-
K20
—--
k, 3k2.31-
-
LOI
———0.240.19-
-
Total
^
-—
99-741100.078
-
-
Tests No. 2 and 4
Metallurgical Results - East Composite
+20 mesh mica5 amp magnetic15 amp magneticFeldspar concentrateQuartz concentrateFerromagnesia Minerals
Head (Calculated)
2.289.12
10.5232.7443.951.39
100.00
^--68.282.6-
-
.--
18.19-23-
-
^
--
0.130.14-
-
w*
--
0.680.65-
-
^.
--
0.0140.018-
-
^
--8.575.01-
-
^--3.762.26-
-
mm--0.290.20-
-
—
--
99.744100.108
-
-
- lit -
een Analyses
-20 Mesh Head - East
Mesh Size(Tyler)
* 10Ik2028351*865
100150200270It 00
- 4ooTotal
# RetainedIndividual
0.30.41.0
12.818.017-112.510.97.05. k3.31.3
10.0
100.0
Cumulative
0.30.71.714.532.5k9.662.173.080.085. k88.790.0
100.0
-
la PassingCumulative
99-799.398.785.567.550.437.927.020.014.611.310.0
-
-
-20 Mesh Head - West
•f 10Ik2028354865
100150200270liOO
- 400
Total
1.01.02.6
14. 516.615.211-711.27.96.54.01.76.1
100.0
1.02.0k. 6
19.135.750.962.673.881.788.292.293.9
100.0
-
99.098.095.480.964.349.137.426.218.311.87-86.1-
-
Screen Analyses - Continued
Feldspar
- 15 -
Mesh Size(Tyler)
* 651001502002701+00
- 1+00
Total
# RetainedIndividual
30,320.115-211.6
7-2l+.l
11.5
100.0
Cumulative
30.350. 1+65.677-28U. 1*88.5
100.0
-
*fa PassingCumulative
69-71+9.63lt.lt22.815.611.5
-
-
Quartz
+ 28351+865
1001502002701+00
- 1+00
Total
21.631.221. It12.7
5.03.12.31.1+0.21.1
100.0
21.652.8 '71+.286.991.995-097.398.798.9
100.0
-
78.lt1+7.225-813.1
8.15-02.71.31.1-
-
LAKEFIELD RESEARCH OF CANADA LIMITED Lakefield, Ontario March 9 , 1981 l sem
00 IO
l ci
O)5 j*: o
co
Soper Twp.-M.I73I
3^404 7 1,51*046
~TB\~T "fi
Q.
O)JQk.
.2
Dawson Road Lots-M.1692
2.4898 GOLDIE 200
Bob K
THE TOWNSHIP OF
GOLDIEDISTRICT OF
THUNDER BAY
THUNDER BAY MINING DIVISION
SCALE: 1-INCH-4O CHAINS
LEGEND
PATENTED LAND
CROWN LAND SALE
LEASESLOCATED LANDLICENSE OF OCCUPATION
MINING RIGHTS ONLY
SURFACE RIGHTS ONLYROADSIMPROVED ROADSKING'S HIGHWAYS
RAILWAYS
POWER LINES
MARSH OR MUSKEG
MINESCANCELLED
C.S.
Loc.
L.O. M.R.O.
S.RO.
NOTES
400' Surface Rights Reservation around all lakes and rivers
600 on each side of the centre line of
Hwy. 17 reserved f rom disposition by Order
in- Council dated Nov. 9,1939.
DATE OF
OCT
SAND a GRAVEL
MTC GRAVEL PIT No. Z 6 7
MTC GRAVEL PIT No. 266
PLAN NO M . 1730
ONTARIO
MINISTRY OF NATURAL RESOURCES
SURVEYS AND MAPPING BRANCH
TTBrm
fir,
52Ai2wwaaa2 2.4090 GOLDIE
LEGEND METASEDIMENTS
INTRUSIVES
SYMBOLS7^7" Bedrock Outcrop
ru
f C cu QouncW'
tm l *KV)RM*f
GOLDIE TOWW4HIP
--; x
210
DWG. No. REFERENCE REV. DATE BY
518015 S ieoie
0*90.BASELINE
w fro CI-.A P.*l*2
DESCRIPTION
STEEP ROCK IRON MINES LTD.STEEP ROCK LAKE, ONTARIO
TITLE:— PETERSON FE.LOSPAR PROPERTV
LOCATION:— c.o^c. vi LOTS ^.7.9 GOLDIE. TOWMSHIR
, ONT.
GENERAL ENGINEER1NGDIVISION.
SCALE: —
DR. BY:
OVTE:
BY: ~
REVH.O ISO ELLCO VEL
fO