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vendredi 15 avril 2016

Fall 2015 Glaze Tests


Four Feldspar Glazes



Molecular Composition of the Base

   Na2O  0.20    Al2O3  0.40     SiO2  2.86
   K2O  0.17                               Fe2O3  0.00
  MgO  0.00                             
  CaO  0.64
                             
Alumina:Silica ratio is  1.00:7.15
Neutral:Acid ratio is    1.00:7.15
Alk:Neut:Acid ratio is 1.00:0.40:2.86
Expansion: 86.3 x 10e-7 per degree

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Industrial Waste Materials Used

1- QIT Red Dust

QIT stands for Quebec Iron and Titanium. QIT owns an ilmenite mine in 
northeastern Quebec.
The ore is shipped to Tracy where it is processed into titanium dioxide slags, 
iron, steel billets and steel autoparts. This dust comes from the dust collecting
system of the steelmelting department and has the following general formula:

FE2O3              85%
SIO2                 5.0%
CAO                5.0%
MGO               1.0%
ZNO               2.0%
CARBON      2.0%
TOTAL        100%

It was 170 mesh sieved.

A  theoritical substitution is as follows for each 1% of the stuff :

   Red Iron Oxide                       0.820
  Silica                                       0.050
 Whiting                                    0.060
 Dolomite                                 0.050   
 Zinc oxide                               0.020
Total                                        1.000

QIT Red Dust may be substituted for by standard 
Red Iron Oxide


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2-QIT Blue Dust

QIT stands for Quebec Iron and Titanium, it owns an ilmemite mine in 
northeastern Quebec.
The ore is shipped to Tracy, Quebec where it is processed to titanium
dioxide slags, iron pigs, steel billets, and steel auto parts.
This dust comes from the reduction kilns in which the ore is separated
into titanium dioxide slag and iron. The general formula of QIT Blue Dust
is as follows:

FEO                  33%
SIO2                 17%
AL2O3              7.0%
TIO2                33%
CAO                 2.0%
MGO                7.0%
KNAO             1.0%
TOT              100%

It was 170 mesh sieved.

A theoritical substitution is as follows for 1 % of the stuff:

Red Iron Oxide               0.310
Silica                             0.020
EPK                               0.110
Rutile                            0.290
Dolomite                      0.050
Magnesium carb.         0.110
Custer Spar                0.110
Total                          1.000

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3-Slater Dust

Slater Steels is a maker of special alloyed steels.

This dust is an industrial waste  material.
It comes from the anti-pollution system of the furnace.
Slater Dust has the following general analysis :

SiO2 5.39%

Fe2O3 50.3

CaO 12.12

MgO 3,27

ZnO 34.28
Total 100

Also small amounts of nickel, chromium,

molybdenum, cadmium, and manganese.



A possible substitution for 1% of this stuff

is as follows :



Dolomite .12

Whiting .11

Zinc oxide (calc.) .28

Silica .03

Red Iron Oxide .43

Total 1.00
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C/9½ R Cobalt Blues
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C/9½ R Chromium Greens
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C/9½ R QIT Red Dust Glazes I
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C/9½ R QIT Red Dust Glazes II
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C/9½ R QIT Blue Dust Glaze I
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C/9½ QIT Blue Dust Glazes II
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C/9½ R Slater Dust Glazes I
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C/9½ R Slater Dust Glazes II
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C/9½ R Manganese Glazes
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