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Views: 0 Author: Site Editor Publish Time: 2025-05-15 Origin: Site
In industries ranging from graphite electrode production to refractory manufacturing, the quality and performance of carbonaceous materials are determined in large part by their structural purity. The Coking Solid Quinoline Insoluble (QI) Matter Tester from Changsha Friend Experimental Analysis Instrument Co., Ltd. provides a reliable, standardized method to quantify insoluble residues in coke and pitch samples, ensuring material consistency and optimal downstream behavior.
Quinoline Insoluble matter refers to the fraction of a carbon sample that remains undissolved when treated with hot quinoline solvent. High QI values often indicate incomplete carbonization or the presence of undesirable macromolecular structures. By measuring QI content, manufacturers gain insight into feedstock suitability, process control, and final product quality.
The tester operates by dispersing a precisely weighed sample into heated quinoline under controlled agitation. Once dissolution is complete, the mixture is vacuum‑filtered, and the retained solid is washed, dried, and weighed. The weight percentage of insoluble residue is then calculated against the initial sample mass. Critical to accuracy are uniform temperature control, consistent stirring, and precision filtration modules—features built into the Changsha Friend instrument.
Corrosion‑resistant reaction vessels: Ensure longevity despite repeated exposure to quinoline.
Digital temperature regulation: Maintains solvent at target temperatures (typically ≈ 120–130 °C) with ±0.5 °C accuracy.
Automated stirring and timing: Provides reproducible mixing conditions and precise dwell times.
Integrated vacuum filtration: Streamlines the separation process, reducing operator steps and potential error.
Electrode Materials: Guarantees low-impurity coke for high-conductivity graphite electrodes.
Refractories: Ensures binder pitches meet mechanical and thermal stability requirements.
Research & Development: Supports formulation of novel carbon composites and binder systems.
To maximize reliability, analysts should grind samples to a consistent particle size, pre‑dry to remove moisture, and validate system calibration using reference materials. Routine maintenance of filters and seals preserves performance and data integrity over time.
