Keramicalia

Tel: +27 (0)11 412 3261 or +27 074 587 2728 Fax: +27 (0)11 692 1232
We manufacture specialised refractories and ceramics.

Zircon

Zircon is a natural mineral ocurring as fine crystals in granite. It is very heavy, hard and chemically inert, so it gets concentrated with other heavy minerals in beach sands. It is extracted together with titania minerals like ilmenite. The sepparation relies on its extremely low electrical conductivity and consequent capacity to retain a static charge. Zircon has very high chemical resistance and is the most important constituent of refractories for glass melting.

Keramicalia makes a coarse zircon castable using recently discovered coarse zircon crystals. It is called Zircast. We also make a zircon mortar which has particularly good adhesive properties.

We make a zircon coating for spraying onto ceramic fibre modules or painting over crumbling brickwork. Our pourable Electricast is our most widely used ceramic for element holders and supports. It can be cast into intricate shapes and is very easy to fettle before firing. We make a stronger, higher purity zircon pourable called Zircon flow.

Next in the range is a self flowing self de-airing castable called Zircon Fine Special. We make a zircon-andalusite castable called Technicast with a very high density and low permeability. It has high strength and good electrical properties and competes with industrial porcelain.

Our zircon rammingachieves high density with spiking installation. Last in the range is a plastic material, zircon mouldable which has very high strength.

Zircon flow is a pourable zircon ceramic. Zircon fine special is a courser version.

Zircon Ferrules

Description;

Boiler tube inserts manufactured from pure zirconium silicate.

Chemical composition 66% ZrO2

                                                34% SiO2

                                                0% CaO

Mineral composition; 100% zircon

Specific gravity; 4,7g/cm3

Hardness;  7, 5 on Moh scale

Chemical reactivity; Almost totally inert.

Acid solubility; HF only

Alkaline solubility; Hot NaOH only.

Sulphur resistance; Immune to all sulphurous gases.

Median crystal size; 4 micron

Porosity; 6-12%

Thermal shock resistance; Excellent.

Zircast

Description; A vibration castable for severe chemical environments.

Density;

Colour; Light brown.

Chemical analysis on dry basis;

Al2O3 6%
Fe2O3 0,01%
SiO2 29,5%
ZrO2 61%
TiO2 0,13%
CaO 2,2%
MgO 0,03%
Na2O 0,05%
K2O 0,004
P2O5 0,13%
Total 99,14%


Packaging; 25kg plastic bags

Product no. 63704

Zircon Mortar

Description; A strongly adhesive hard coating or mortar with chemical resistance.

Density; 3,07

Colour; Light brown.

Chemical analysis on dry basis;

Al2 O3 2.6%
Fe2O3 0,17%
SiO2 40%
ZrO2 53%
TiO2 0,2%
CaO 0,08%
MgO 0,05%
Na2O 3,5%
K2O 0,33%
PO5 0,1%


Packaging; Plastic buckets; 2kg, and 20kg.

Product no. 442

Zircon Coating

Description; Azircon paint, water based, supplied wet in buckets

Applications; Sealing porosity of furnaces and brickwork and ceramic fibre. Foundry mould coatings. Preventing adhesion of metal splash. Reducing splash from cardboard sampler tubes etc. Surface hardening of insulation materials.May be used in contact with molten metals. Reducing wettability of refractories. Reducing alkali attack on crucibles.

Mix it before application to get it all in suspension. On very smooth surfaces it may crawl; add a few drops of dishwashing liquid to prevent this.

Colour; Light brown.

Viscosity; 80 Baum‚.

Density; 2,0 g/cm³

Chemical analysis on dry basis;

Al2 O3 13%
Fe2O3 0,24%
SiO2 43%
ZrO2 40%
TiO2 0,9%
CaO 0,1%
MgO 0,14%
Na2O 1,9%
K2O 0,2%
Total 99,48%


Packaging; Plastic buckets; 2kg, and 20kg.

Zircon Ramming

Description; A fine zircon ramming refractory. It requires intensive ramming with a sharp pointed instrument, but gives very high density.

Chemical analysis;

Al2 O3 2%
Fe2O3 0,2%
SiO2 32%
ZrO2 61%
TiO2 0,1%
CaO 0,1%
MgO 0,1%
Na2O 0,1%
K2O 0,1%
P2O5 1,8%


Density; 3,5 to 3,7g/cm³

Note; The standard sand rammer test will give a density of about 3,34g/cm³. To achieve full density, ram 400g 20 + 20 blows, repeated 3 times, to get a density of 3,5 to 3,7g/cm³ plus.

Packaging; 20kg plastic buckets

Shelf life about 6 months.

Zircon Mouldable

Description: A high strength, abrasion resistant plastic material. Applications; Patching of areas sujected to intense chemical corrosion.

Density: 3,32 wet, 4,14 dry.

Colour: Brown.

Chemical analysis on dry basis;

Al2 O3 3%
Fe2O3 0.1%
SiO2 32%
ZrO2 53%
TiO2 0.3%
CaO 0.07%
MgO 0.02%
Na2O 1%
K2O 0.02%
L.O.I. 9.5%
Total 99.01%


Packaging:
Plastic buckets; 2kg, and 20kg.

Product no: 63808

Zircon Flow

Description: A self flowing pourable ceramic for severe chemical environments

Density: 1610g wet cube

Colour: Light brown.

Water addition: +6,5%

Chemical analysis on dry basis:

Al2O3 6.5%
Fe2O3 01%
SiO2 29%
ZrO2 60%
TiO2 0.13%
CaO 2.5%
MgO 0.04%
Na2O 0.08%
K2O 0.005%
P2O5 0.17%

Packaging: Plastic buckets; 2kg, and 20kg.

Product no: 36158

Zircon Fine Special

Description: A self flowing castable for severe chemical environments.

Density: 1480g wet cube

Colour: Light brown.

Water Addition: +9%

Chemical analysis
on dry basis:

Al2 O3 8%
Fe2O3 0.1%
SiO2 29%
ZrO2 60%
TiO2 0.13%
CaO 2.8%
MgO 0.04%
Na2O 0.04%
P2O5 0.1%
Total 100.41%


Packaging: 25kg plastic bags

Product no: 63705