Selecting the right sampling ladle size is critical for safe and stable rare earth molten metal sampling.
This interactive guide helps engineers and purchasing teams estimate a suitable ladle size based on furnace opening, required sample volume, molten metal type, and operating conditions.
1. Application Information
Please select your molten metal type:
- Neodymium (Nd)
- Praseodymium (Pr)
- Lanthanum (La)
- Cerium (Ce)
- NdPr Alloy
- Other Rare Earth Metal
2. Furnace / Crucible Opening
Please enter your furnace or crucible opening diameter:
Opening Diameter: ______ mm
Recommended ladle head diameter:
- For safe operation, the ladle head should usually be smaller than the furnace opening.
- A common reference range is 70–90% of the opening diameter.
- For narrow openings or deep crucibles, more clearance is recommended.
Example:
If the furnace opening is 200 mm, the suggested ladle head diameter is usually around 140–180 mm, depending on operating space.
3. Required Sample Capacity
Please choose your required sample amount:
- 0.2–0.5 kg
- 0.5–1 kg
- 1–2 kg
- 2–3 kg
- 3–5 kg
- Custom capacity
General size reference:
| Required Sample Capacity | Suggested Ladle Head Diameter | Suggested Depth |
|---|---|---|
| 0.2–0.5 kg | 60–80 mm | 40–60 mm |
| 0.5–1 kg | 80–100 mm | 50–70 mm |
| 1–2 kg | 100–130 mm | 60–90 mm |
| 2–3 kg | 130–160 mm | 80–100 mm |
| 3–5 kg | 160–200 mm | 90–120 mm |
Final dimensions should be confirmed according to molten metal density, furnace structure, and operator handling method.
4. Operating Temperature
Please enter your working temperature:
Operating Temperature: ______ °C
Reference guide:
- Below 900°C: standard high-temperature sampling design may be considered
- 900–1200°C: reinforced structure and suitable alloy selection are recommended
- Above 1200°C: customized high-temperature tool design is suggested
For rare earth molten metal applications, tool material selection should consider not only temperature but also corrosion resistance, reaction tendency, and repeated service cycles.
5. Handle Length Selection
Please choose the required operator distance:
- 400–800 mm: laboratory or small furnace operation
- 800–1200 mm: standard industrial furnace operation
- 1200–1500 mm: deep furnace or higher heat exposure environment
- Custom length
Recommended handle length depends on:
- Furnace depth
- Operator position
- Radiant heat exposure
- Sampling angle
- Ladle head weight
Longer handles improve safety distance but require stronger structure and better balance.
6. Ladle Shape Selection
Please choose the preferred ladle head shape:
Semi-Spherical Ladle
Recommended for stable flow control and regular molten metal sampling.
Deep Bowl Ladle
Recommended when larger capacity is required.
Cylindrical Ladle
Recommended for higher-volume sampling or special furnace structures.
Custom Design
Recommended when furnace opening, sample volume, or operating space is limited.
7. Material Recommendation
Based on rare earth molten metal applications, common tool materials include:
Titanium Alloy Sampling Ladle
Suitable for repeated molten rare earth sampling where lightweight handling, corrosion resistance, and stable service life are required.
Stainless Steel Sampling Ladle
Suitable for lower-demand applications or cost-sensitive operations, but may have shorter service life in aggressive rare earth environments.
Tungsten / Molybdenum Components
Suitable for high-temperature electrochemical or crucible-related applications, depending on actual process conditions.
8. Quick Selection Logic
You can use the following simple selection logic:
- Confirm furnace opening diameter
- Select ladle head diameter at 70–90% of opening size
- Confirm required sample weight
- Match ladle depth according to capacity
- Select handle length according to operator distance
- Choose material according to temperature and molten metal type
- Finalize drawing before production
9. Example Calculation
Customer Condition
- Molten metal: Lanthanum / Cerium
- Furnace opening: 200 mm
- Required sample: 2 kg
- Working temperature: around 1000–1200°C
- Operator distance: about 1000 mm
Suggested Design
- Ladle head diameter: 130–160 mm
- Depth: 80–100 mm
- Handle length: 1000–1200 mm
- Material: Titanium alloy
- Structure: reinforced welded handle design
This is only a reference. Final dimensions should be confirmed based on drawing and actual operating conditions.
10. Request a Custom Size Recommendation
To receive a suitable sampling ladle size recommendation, please send us the following information:
- Molten metal type
- Working temperature
- Furnace or crucible opening diameter
- Required sample weight or volume
- Required handle length
- Current ladle material, if available
- Photos or drawings of your furnace opening
Our team can provide customized high-temperature sampling ladles for rare earth molten metal applications, including Nd, Pr, La, Ce, and NdPr alloy systems.
Contact us for customized size selection and quotation.
