How to properly use a pre-furnace analyzer
The same device can yield results differing by 0.5% carbon simply due to variations in insertion technique and reading timing.
A pre-furnace analyzer is only valuable when results reach decision-makers in time. Therefore, placement and operation are just as critical as the device itself: incorrect placement may lead operators to skip checks during urgent furnace operations.
Here is the common operating procedure for thermal analysis equipment in workshops, along with frequent issues and prevention methods.
Key Control Points
Machine Placement
Place near the sampling area, but away from dust and direct heat; ensure the table is stable and vibration-free.
Sample correctly
Draw from the center of the tank or ladle, not near the walls or slag layer.
View results
Read after the curve is complete; early display values are provisional.
Record
Record batch number, time, and sampler for traceability when needed.
Real-world experience
- Hang a short 5-step operation chart next to the machine so new hires get it right from their first shift.
- Inspect cups before each shift; discard warped or damp ones.
- Periodically clean the cup chamber; metal residue reduces sensitivity.
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-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
CYY-LK7 Molten Iron Thermal Analyzer for Foundries
Liquid Iron Thermal Analyzer CYY-LK7 — analyzes cooling curve, measures CEL, C%, Si%, Mn%, and spheroidization ratio. CE certified with 15-inch TFT display.
Reference price: 1700-1900 USD
Frequently Asked Questions
Does the device take a long time to boot?
The device may take a few minutes to stabilize after power-on; turn it on before the shift, not when samples are already present.
What is an acceptable margin of error?
Varies by device and internal requirements. The correct approach is to establish a device-specific alert threshold based on comparisons with the laboratory across multiple batches.
Related topics
- Thermal analysis for cast iron: from sampling to results
- How to properly use analysis equipment and technician expertise
Reference content from Changyouyi's technical article: original post on Sohu.
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