Use C-Si meter to stabilize batch quality.
Batch-to-batch consistency doesn't come from better equipment; it comes from measuring every batch the same way.
Fluctuation between batches is the hardest defect to detect in the foundry. Each individual batch stays within spec, but when a week's worth of batches are combined, significant deviations appear. This leads to increased scrap rates with no clear root cause.
The carbon-silicon analyzer reveals this trend through data. Its value lies not in a single measurement, but in a sufficiently long data series that shows the direction of the process.
Key Control Points
Set threshold
Each iron grade has its own C% and Si% range; set alert thresholds by grade, not by the entire plant.
Frequency
Test every batch with mills that frequently change materials; test by lot with mills that have stable formulations.
Handle misalignment
Log previous actions: Add carbon enhancer, add ferrosilicon, or add pig iron.
View trends
Compare weekly averages to detect gradual drift instead of just reviewing individual batches.
Real-world experience
- Do not change the cup type during a tracking cycle, as it will create false data jumps.
- Record both the sampler and operator to distinguish between device-induced and handling-induced variations.
- Periodically verify with the laboratory to ensure internal data remains accurate.
Compatible device
CYY-LK2 Pre-furnace Rapid Carbon-Silicon Analyzer
Carbon-Silicon Analyzer CYY-LK2 — Analyze C and Si in molten iron before the furnace. CE certified, English interface.
Reference price: 700-800 USD
CYY-LK7 Cast Iron, Gray Iron, and Ductile Iron Analyzer
Gray Cast and Ductile Iron Analyzer CYY-LK7 — Analyzes C, Si, Mn, CEL, spheroidization ratio, tensile strength, and hardness. CE certified with 15-inch-inch TFT display.
Reference price: 1700-1900 USD
CYY-QC2 Square Carbon Silicon Probe Cup
CYY-QC2 Square carbon silicon sampling cups for C-Si analyzers. Integrated with Tellurium to measure C%, Si%, CE, and CEL. A flagship product in the Changyouyi square cup series.
Reference price: 0.6-1.6 USD
Frequently Asked Questions
When will I see results?
Typically, after 3-4 weeks of consistent recording, there is sufficient data to compare between cases and batches.
Do we need to hire more staff?
No, if sampling is integrated into the existing melting operation. Each cycle takes approximately 2-3 minutes.
Related topics
Reference content from Changyouyi's technical article: original post on Sohu.
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