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

Formula of the Base

Na2O  0.14    Al2O3  0.44      SiO2  3.38

K2O  0.14                            P2O5  0.00

MgO  0.00                          TiO2  0.00

CaO  0.72                          Fe2O3  0.00

Alumina:Silica ratio is  1.00:7.62

Neutral:Acid ratio is    1.00:7.63

Alk:Neut:Acid ratio is 1.00:0.44:3.38

Expansion: 76.1 x 10e-7 per degree C

Brun Foncé Glacé

Custer feldspar    25

Kona F-4    25

Whiting    20

EPK    10

Silica    20

Bentonite      1

Slater Dust      6

Noir Glacé

Custer feldspar    25

Kona F-4    25

Whiting    20

EPK    10

Silica    20

Bentonite      1

Slater Dust      7

Noir Glacé

Custer feldspar    25

Kona F-4    25

Whiting    20

EPK    10

Silica    20

Bentonite      1

Slater Dust      8

Noir Glacé

Custer feldspar    25

Kona F-4    25

Whiting    20

EPK    10

Silica    20

Bentonite      1

Slater Dust      9

Noir Glacé

Custer feldspar    25

Kona F-4    25

Whiting    20

EPK    10

Silica    20

Bentonite      1

Slater Dust    10