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Product Overview

Description

chromite ore sand for Foundry
Top quality foundry chrome ore lumpy manufacturer south africa, also known as chromite sand, is a special sand for foundry. It is a natural spinel dominated by chromite. After crushing, grinding and sieving, it is divided into prescribed grain size, and is suitable for sand for moulding (core-making). Chromium ore sand can be divided into two grades according to chemical composition,first grade Cr2O3 (> 45%) and second grade Cr2O3 (> 35%).
Features:
1. Heated Volume Stability
2. High thermal conductivity
3. Strong alkali resistance
4. Solid phase sintering, non-sticking sand
THE ADVANTAGE OF CHROMITE SAND
Comparing with silica sand,chromite sand can avoid most sand stick on the casting,therefor it can also save cost to make surface treatment. Moreover,chromite can be recycle used for several times upon to different technology.
Over all the chromite ore in the world, the one from South Africa are of the best quality level.So HAIXU Abrasive import original chromite ore from there and refine it to better purity to 46% Cr2O3.
THE APPLICATION
Chromite sand‘s’ properties enable the material to be used in high duty grey iron and steel foundries as core and mould making sand. Its high thermal conductivity gives it good chilling properties, low thermal expansion gives rise to good dimensional stability. Itsbasicity being close to neutral allows the use of a wide range of resin bonding systems and inorganic binders, it has a high refractoriness and a broad sieve distribution.

Chromite sand is suitable for steel casting including foundry such as:
Green Sand molding;
Shell molding;
Pep-Set system;
Furan Resin and Alkaline-phenolic Resin;
Core moulding
Lost foam casting

How to Choose grit size?
Generally,the smaller casting need to make, the finer grit size foundry adopted.The following frame shows it for reference:
Less than 500KGS
500-1000KGS
1-10 Tons
10-30 Tons
30-100 Tons
AFS40-70
AFS 45-50
AFS 45-50
AFS40-45
AFS 35-40
Specification
CHEMICAL COMPOSITION
Cr2O3
≥46.0%
SiO2
≤1.0%
FeO
≤26.5%
CaO
≤0.3%
MgO
≤10%
AL2O3
≤15.5%
P
≤0.003%
S
≤0.003%
Cr/Fe
1.55:1
TYPICAL PHYSICAL PROPERTIES
Hardness:
Mohs:5.5-6
Melting Point:
Sublimes at 2180 ℃
Sintering point:
>1800℃
The sintered
1600℃
Specific Gravity:
4.0-4.8 g/cm3
Bulk density(LPD):
2.5-3 g/cm3
Color:
Black
PH
7-9
Percentage of free acid present in the sand
0%
The amount of the acid
≤2ML
Percentage of soil
≤0.1
Percentage of Moisture
≤0.1
AVAILABLE SIZES
AFS15-20,AFS15-25,AFS25-35,AFS25-30,AFS30-35,AFS35-40,AFS40-45,AFS45-50,AFS40-50,AFS50-55,AFS55-60,AFS60-65 customized sizes are available upon request
Packing & Delivery
Company Profie
Factory
Factory
workshop
FAQ

Q : Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment.
Q:Which region is your main market?
A:We have many customers from South Korea, Japan, Russia, North America. Most of those clients cooperated with us more than 10 years. chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry chromite ore sand for Foundry
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