Chromite ore sand from China for Tundish Nozzle filler Sand
Chromite ore sand is a professional refractory raw material specially used as tundish nozzle filler sand in steel continuous casting. This material is original from South Africa and get treatment process in China. It is processed from high-grade chromite ore through crushing, magnetic separation, screening and precise particle gradation.
Characteristics
1. High refractoriness & thermal stability
It features ultra-high melting point, excellent high-temperature volume stability and low thermal expansion. It does not soften, melt or deform under high molten steel temperature, effectively protecting the tundish nozzle filler.
2. Excellent automatic pouring performance
With reasonable particle gradation and good fluidity, it forms a loose inner layer and slight sintered surface layer at high temperature. It ensures high automatic breakout rate, avoids oxygen burning operation and reduces steel leakage risk.
3. Strong slag corrosion & penetration resistance
Dense grain structure resists erosion from molten steel and refining slag, prevents steel liquid penetration and nozzle clogging, keeps continuous casting process stable.
4. Low impurity & stable chemical property
Low silica and low harmful impurities, chemically inert at high temperature. It will not pollute molten steel, suitable for carbon steel, alloy steel and stainless steel casting.
Application
Widely used as filling and drainage sand for continuous casting tundish nozzle, ladle sliding gate and ladle nozzle well block,starting ladle mixtures. It is an essential refractory consumable to improve casting efficiency and steel quality in metallurgical industry.
Particle size of Chromite ore sand from China for Tundish Nozzle filler Sand：
| AFS NO. | AFS25-30 | AFS30-35 | AFS35-40 | AFS40-45 | AFS45-50 | AFS50-55 | |
| MESH RANGE | 20-40# | 20-50# | 20-60# | 40-70# | 50-100# | 50-100# | |
| MESH SIZE | MESH NO. | ||||||
| 2800 um | 10# | ≤2 | |||||
| 850 um | 20# | 15-40 | ≤10 | ≤10 | |||
| 600 um | 30# | 30-55 | 25-45 | 15-20 | ≤3 | ||
| 425 um | 40# | 15-35 | 20-40 | 20-40 | ≤10 | ≤5 | ≤3 |
| 300 um | 50# | ≤3 | 5-25 | 10-25 | 30-40 | 10-25 | ≤10 |
| 212 um | 70# | ≤5 | ≤10 | 25-45 | 25-45 | 30-50 | |
| 150 um | 100# | ≤5 | ≤10 | 10-25 | 15-35 | ||
| 106 um | 140# | ≤5 | ≤10 | ≤10 | |||
| 75 um | 200# | ≤5 | ≤5 | ||||
| 53 um | 270# | ||||||
| PAN | |||||||
Typical chemical analysis of Chromite ore sand from China for Tundish Nozzle filler Sand
| Item | Guarantee Value(%) | Typical Value(%) |
| Cr2O3 | ≥46.0 | 46.42 |
| SiO2 | ≤1.0 | 0.86 |
| Fe2O3 | ≤27.5 | 26.9 |
| Al2O3 | ≤15.5 | 15.2 |
| MgO | ≤10.0 | 9.4 |
| CaO | ≤0.3 | 0.2 |
| P | ≤0.003 | / |
| S | ≤0.003 | / |
| Soil content | ≤0.1 | / |
| Moisture | ≤0.1 | / |
| L.O.I/ | ≤0.5 | / |
Typical physical properties of Chromite ore sand from China for Tundish Nozzle filler Sand
| Hardness: | Mohs:5.5-6 |
| Melting Point: | Sublimes at 2180 °C |
| Sintering point: | >1800°C |
| Specific Gravity: | 4.0-4.8 g/cm3 |
| Bulk density(LPD): | 2.5-3 g/cm3 |
| Turbidity (JTU) | 110 |
| Color: | Black |
| PH Value | 7.3 |
| Percentage of free acid present in the sand: | 0% |
| Acid demand Value | ≤5ML |
| Percentage of soil: | ≤0.1 |
| Percentage of Moisture: | ≤0.2 |
Other specifications of chromite sand:
| Mesh size | AFS /GNF | Particle range |
| 20-40# | AFS25-30 | 0.4-0.8mm |
| 20-50# | AFS30-35 | 0.3-0.8mm |
| 20-60#,20-70#,30-70# | AFS35-40 | 0.2-0.6mm，0.25-0.65mm, 0.2-0.8mm，0.2-0.9mm |
| 40-70# | AFS40-45 | 0.2-0.4mm |
| 50-100# | AFS45-50,AFS45-55,AFS50-55 | 0.15-0.3mm，0.2-0.3mm |
| 70-140# | AFS65-70,AFS70-75 | 0.1-0.2mm |
Applications of chromite sand:
- Surface sand and molding sand used in sand casting, no-bake sand, water glass resin sand and other casting processes.
- Resin coated casting sand.
- Core moulding sand.
- Foundry sand for heavy thick-walled castings, high manganese steel with high pouring temperature, and alloy steel castings.
- Moulding sand and core sand for small and medium-sized castings such as stainless steel, carbon steel, high chromium carbon steel, and manganese steel.
- Raw material Well filer sand of ladle nozzle.
- Refractory aggregate for Magnesia-chrome refractory bricks, ladle slag line.
Chromite sand AFS 30/35 AFS30-35 for Tundish Refractory Material Production:
Chromite sand AFS 30/35 AFS30-35 for Tundish Refractory Material Package:
FAQ:
Q: Where are you located?
A: Our factory is located in a tariff-free Zone at Lianyungang port. So it will be convenient to export.
Q: What is your main market?
A: Our main market is local China and Asia-Pacific regions.
Q: What is the difference between your chromite sand and Original South Africa Chromite sand?
A: In our factory, we take production processes on original South Africa such as washing, magnetic removing, and sieving. So it is cleaner with fewer impurities, less magnetic content. The cleanness of chromite from us is just proper for the foundry industry. In the meantime, we will get a precise AFS size and make customized particle size distribution to the requirement.
Q: Do you have a limit of MOQ?
A: No. We don’t have a limit on MOQ, but for small quantities, the transportation cost would be high.
Q: Can you provide free samples?
A: Yes, free samples within 25 kgs are available. You only have to bear the express cost.
Q: What is the delivery time for one container?
A: Generally the lead time of FCL is 7-10 days. A bigger quantity will get a longer delivery time.
Q: What is the HS code of Chromite sand?
A: The chromite sand HS code is 2610000000.
Q: Do you get MSDS of chromite sand?
A: Yes. You can download it from our website or get it from our sales team.
