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