SphereOX

SphereOX is a blend of iron oxides with a spherical grain shape and high iron contents.

SphereOX is a synthetic product with a narrow grain size distribution.

SphereOX

Advantages of SphereOX: High purity no free silica or heavy metals Little surface less binder consumption

High thermal capacity prevents casting defects High strength reduces core breakage Gas permeability for easy gas escape Low fines content: improves tool cleanliness provides clean working environment

SphereOX

Which material grades are good with SphereOX ? Gray iron Nodular iron Steel Bronze Aluminum

Which binder system yields the best effects? Cold box Askoset Epoxy/SO2 Avenol

SphereOX

How does SphereOX work?

Less surface - Requires less binder, round vs. angular grain sizePlasticity is increased - Sand expands without developing veining

Stability is increased - Additional cooling provides dimensional stabilityGas permeability - Allows for expansion and gas escape

Adsorbs gas - Eliminates hazardous gassesHigher strength - Prevents core breakage

SphereOX

Addition levels:

From 5 to 25% SphereOX in silica sand are needed in order to substitutechromite sand.

Possible savings:Substituting the existing sand mixtures lead to the following savings: 100% chromite sand 70% chromite sand 40% chromite sand 30% - 80% 10% - 75% up to 50%

SphereOX

A foundry has been using 100% chromite sand. This quality can be substituted with 8% SphereOX added to the silica sand. The mixed sand costs were lowered by approx. 68%.

Reclamation of sand: Part of the SphereOX is separated by a magnetic separator Part of the SphereOX is removed as fines content from the sand circulation -> This eliminated an unwanted accumulation of product in the mold material.

SphereOX

Calculation:Silica price (to) SphereOX price (to) Chromite sand price (to) Chromite sand contents Chromite sand mixture (to) 32,00 800,00 350,00 50% 191,00

Amount of SphereOX 5% 10% 15% 20% 25%

Costs of SphereOX sand mix (to) 70,40 108,80 147,20 185,60 224,00

Cost savings 63% 43% 23% 3% -17%

SphereOX

Calculation:Silica price (to) SphereOX price (to) Chromite sand price (to) Chromite sand contents Chromite sand mixture (1000l) Amounts of SphereOX 5% 10% 15% 20% 25% 32,00 800,00 350,00 60% 427,63

Costs of SphereOX Cost savings sand mix (1000l) 100,99 76% 160,02 222,12 287,53 356,51 63% 48% 33% 17% D Sphereox D Quarz D CRS 2,7 1,4 2,55