In a modern foundry, controlling the chemical composition of molten iron is an important part of production management.
Among the various elements in cast iron, Carbon, Silicon and Manganese are especially important process parameters.
When the composition of molten iron moves outside the target range, the final casting may not achieve the required metallurgical or mechanical properties.
For this reason, many foundries need a rapid carbon silicon analyzer that can provide useful composition information directly during the melting and casting process.
The CYY-LK7 Intelligent Carbon-Silicon-Manganese Analyzer was developed for this type of application.
The term "carbon silicon analyzer" is commonly used by foundry professionals searching for equipment to measure C and Si in molten iron.
However, the CYY-LK7 provides a wider range of analytical functions.
The system can evaluate:
Carbon Equivalent (CEL)
Carbon Content (C%)
Silicon Content (Si%)
Manganese Content (Mn%)
Spheroidization Rate
Tensile Strength
Brinell Hardness
This makes the CYY-LK7 more than a simple C/Si measurement device.
It can be used as a molten iron composition analyzer and foundry process-control instrument.
Carbon and silicon are fundamental elements in cast iron production.
Their levels affect the solidification behavior and metallurgical characteristics of the melt.
Manganese is also an important process parameter for many cast iron grades.
Instead of waiting until the casting is completed, the foundry can analyze a molten iron sample during production and use the result as a reference for process adjustment.
The CYY-LK7 provides the following measurement ranges:
| Parameter | Range | Accuracy |
|---|---|---|
| Carbon Equivalent (CEL) | 2.50–4.80% | ±0.08% |
| Carbon (C%) | 2.30–4.20% | ±0.05% |
| Silicon (Si%) | 0.60–3.80% | ±0.10% |
| Manganese (Mn%) | 0.10–1.40% | ±0.15% |
| Spheroidization Rate | 60–99% | ±5% |
| Tensile Strength | 150–400 MPa | ±10 MPa |
| Brinell Hardness | 100–300 HB | ±10 HB |
The CYY-LK7 uses a thermal analysis method based on the cooling curve.
A representative molten iron sample is placed into a dedicated sample cup.
The instrument monitors the temperature change during cooling and solidification.
The cooling curve contains information related to the metallurgical behavior of the sample.
The CYY-LK7 processes this information and provides the corresponding analytical results.
The complete concept can be summarized as:
Sample → Cooling Curve → Thermal Analysis → C/Si/Mn & CEL Results → Process Decision
The typical analysis time is approximately 90 seconds, making the system suitable for rapid production control.
A laboratory is normally designed for detailed chemical analysis.
A production-floor analyzer has a different purpose.
The operator needs information quickly enough to make a decision while the molten iron is still available.
This is why a professional carbon silicon analyzer for molten iron can be valuable in the foundry.
The CYY-LK7 can be used near:
Melting furnaces
Holding furnaces
Treatment stations
Ladle preparation areas
Casting production lines
Ductile iron treatment areas
The goal is to bring analysis closer to the actual production process.
Carbon Equivalent, or CEL, is an important reference value in cast iron production.
Instead of looking at individual chemical elements only, the carbon equivalent provides additional information about the overall carbon-equivalent condition of the melt.
The CYY-LK7 has a CEL measuring range of:
2.50–4.80%
with a stated accuracy of:
±0.08%
This allows the operator to consider CEL together with C%, Si% and other process information.
Ductile iron production requires additional process control compared with many conventional cast iron applications.
In addition to composition, foundries may be concerned with the effectiveness of spheroidization and the expected mechanical properties.
The CYY-LK7 supports:
Spheroidization Rate: 60–99%
and provides predicted values for:
Tensile Strength: 150–400 MPa
Brinell Hardness: 100–300 HB
This allows the analyzer to be used as part of a ductile iron quality-control workflow.
Correct sampling is essential for reliable thermal analysis.
The CYY-LK7 uses dedicated sample cups according to the measurement purpose.
For composition measurement, the dedicated composition-analysis sample cup contains tellurium granules.
For spheroidization rate and tensile strength / hardness prediction, a sample cup without tellurium granules is used.
Therefore, the operator should select the appropriate sample cup according to the required test.
This distinction is particularly important when the same instrument is used for different cast iron quality-control tasks.
A useful foundry analyzer should not only display numbers.
The results should help the production team decide what to do next.
The CYY-LK7 supports automatic or manual calculation of required composition additions according to the configured production requirements.
For example, when the measured composition does not reach the target, the analysis result can be used as a reference when deciding whether additional alloying materials or other charge materials are required.
The production workflow can therefore become:
Measure → Compare → Calculate → Adjust → Re-test → Cast
This approach can help reduce unnecessary trial-and-error during molten iron preparation.
Foundries often process many heats every day.
If every result is recorded manually, it can become difficult to compare historical data.
The CYY-LK7 supports data storage and historical record review.
The system can store more than 5,000 measurement results and can reproduce historical measurement data and cooling curves.
Optional data-output interfaces can also support data transfer through USB or RJ45, depending on the configured equipment.
For a production plant, this creates opportunities for:
Heat-by-heat comparison
Process trend analysis
Quality records
Historical review
Production traceability
Process improvement
The CYY-LK7 can be used in many cast iron production environments.
For monitoring molten iron used for automotive castings and components.
For checking molten iron composition before casting valve bodies and related components.
For supporting composition control during cast iron pipe production.
For monitoring C, Si, Mn and CEL during production.
For composition analysis together with spheroidization evaluation.
For rapid molten iron quality checks during different heats.
For many foundries, the important question is not simply:
"Can the instrument measure carbon?"
The more useful questions are:
How quickly can I get the result?
Can I analyze the molten iron before casting?
Can I also evaluate silicon, manganese and carbon equivalent?
Can I review historical cooling curves?
Can I use the results for production adjustment?
The CYY-LK7 is designed around these practical production requirements.
| Item | Specification |
|---|---|
| Model | CYY-LK7 |
| Analyzer Type | Intelligent Carbon-Silicon-Manganese Analyzer |
| Measurement Principle | Cooling Curve Thermal Analysis |
| Typical Analysis Time | Approx. 90 seconds |
| Main Parameters | CEL, C%, Si%, Mn%, Spheroidization Rate |
| Mechanical Property Prediction | Tensile Strength, Brinell Hardness |
| Display | 15-inch TFT True Color Display |
| Working Temperature | 0–40°C |
| Relative Humidity | <80% |
| Power Supply | AC 220V, 50Hz |
| Power Dissipation | 40W |
| Net Weight | Approx. 13 kg |
| Shipping / Volumetric Weight | Approx. 17–18 kg |
| HS Code | 9031809090 |
A carbon silicon analyzer is an instrument used to evaluate carbon and silicon-related parameters in molten metal or cast iron. The CYY-LK7 additionally provides manganese, carbon equivalent and other analytical functions.
Yes. The CYY-LK7 is designed for molten iron analysis in foundry production.
Yes. The stated manganese measurement range is 0.10–1.40%, with an accuracy of ±0.15%.
The typical analysis time is approximately 90 seconds.
Yes. The instrument supports spheroidization rate evaluation and predicted tensile strength and Brinell hardness.
Yes. The system supports historical data recording and can store more than 5,000 measurement results according to the supplied product information.
The sample cup should be selected according to the test purpose. Composition analysis uses the dedicated cup with tellurium granules, while spheroidization and mechanical-property prediction use the corresponding cup without tellurium granules.
If you are searching for a:
Carbon Silicon Analyzer
Carbon Silicon Manganese Analyzer
C Si Mn Analyzer
Molten Iron Composition Analyzer
Cast Iron Composition Analyzer
or Foundry Process Analyzer, the CYY-LK7 provides an integrated solution for rapid molten iron quality control.
Nanjing Changyouyi Analysis Instrument Co., Ltd. supplies analysis equipment for foundry and metal-melting applications.
Contact us for the CYY-LK7 technical specification, sample cup information, application details and quotation.
Rapid Analysis. Better Process Control. More Information Before Casting.