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Name of Product Foundry Grade Unexpanded Perlite Ore Hard
Size of Product 0.85 - 2.40 mm
Used for Foundry, Construction, Horticulture
Grade C.I. Grade (Cast Iron, Ductile Iron and S.G.)
Granulometric Analysis
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SIZE
(mm)
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SIZE
(mesh)
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WEIGHT PERCENT*
(%)
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+2.80
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+7
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5 - 20
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2.80 - 2.40
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7 - 8
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5 - 15
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2.40 - 1.20
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8 -16
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55 - 85
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1.20 - 0.85
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16 - 20
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5 - 15
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-0.85
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-20
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0 - 2
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*Tested at Plant before Packing
Physical Properties
1. Rock Structure : Classical Perlite
2. Colour : Grey
3. Bulk Density : 1150-1300 kg/m3
4. Moisture : Max. 1%
5. pH : 6 - 8.5
Total Chemical Composition
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SiO2
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73 - 75
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∑Fe2O3
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0.6 - 0.9
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Al2O3
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12 - 14
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Na2O
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3 - 4.5
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K2O
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4.9 - 5.8
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CaO
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0.3 - 0.9
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MgO
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0.15 - 0.25
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H2O (L.O.I.)
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3.5 - 4.5
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Technical data shown are considered accurate and reliable. However no guarantee is given or intended.
Applications:
Advantages:
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Efficient Slag Remover
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Act as an insulating blanker, so helps to maintain temperature in ladle
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Save upto 20% Perlite than other grades
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Cheaper than branded slag holding compounds.
SPECIFICATION SHEET
MATERIAL : PERLITE ORE (1.00 -2.80 mm)
Grade : Steel and Investment Casting Grade
Origin of Material : TURKEY ORIGIN
Chemical Analysis
Element Percentage(%)
SiO2----74.32
TiO2 --- 0.11
Al2O3 --- 12.94
Fe2O3 --- 0.77
CaO --- 0.69
MgO --- 0.08
Na2O --- 3.02
K2O --- 4.67
BaO -
Loss on ignition 3.38
*Tested at Plant before Packing
Perlite Ore is natural product and is accordingly subject to size and chemical analysis variations. The typical percentages in the specification can be expected to be as shown but are not guaranteed. The specification supersedes any former publication and is subjected to change without notice.
Standard Packing 50 Kg(Approx.) HDPE Bags suitable for export.
Advantages:
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Efficient Slag Remover
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Act as an insulating blanket, so helps to maintain temperature in ladle
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Recommended for Steel and I.C. to get supreme results
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Cheaper than branded slag holding compounds.
Technical Information of Perlite Usage in Foundry Industry
Perlite is a Slag-Holding compound is added as a slag coagulant in continues induction furnace and in molten metal pouring ladles, prior to pouring in the mould. It may be added either to the surface of the bath after the ladles is filled or to the bottom of the ladle after a heel of molten metal has been poured. In application, Perlite has got tendency to exfoliate on the temperature above 800 oC, so it will expand when it comes into contact with melt, forming a lightweight, viscous cellular accumulation. This accumulation of Perlite attracts all individual slag particles in the metal, cleans the metal by coagulating impurities, floating them up to the slag layer and also re-entry of the impurities into the metal. Perlite also helps in reducing Sulphur and Phosphorus compounds in the melt.
Summary
- It ensures a clean metal surface free from Slag by coagulating the impurities.
- It forms an Efficient Insulating layer on the top of ladle which significantly reduces the radiant loss of heat that may be maintained until pouring time and hence therefore acts as an insulating barrier.
- It also reduces Sulphur content and also prevents reentry into the bath when added to ladle by holding them in the slag.
- It does not produce objectionable smoke or noxious fumes, hence non-polluting.
- The additional benefit of using Perlite in excess will help reducing contents of Sulphur and Phosphorus.
Value Addition
Perlite Ore mixed with Raw Vermiculite can be a superior ladle topping agent Since, exfoliation of Vermiculite is an endothermic reaction, so it helps to maintain the high temperature in ladle, also removes non-metallic inclusions in excess.
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