A detection method for free carbon in continuous casting mold flux
A continuous casting mold slag and detection method technology, which is applied in the field of metallurgical testing, can solve the problems of difficult compaction of pickling asbestos bottom, long filtering and washing time, poor detection repeatability, etc., and achieves the advantages of short time, high detection efficiency and short process Effect
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Embodiment 1
[0037] Weigh 0.1g±0.1mg of 1# continuous casting mold slag into a sulfur-carbon crucible (Φ×h=25mm×25mm), shake the crucible gently to spread the continuous casting mold slag on the bottom of the crucible, and use a dropper to Add 5 drops of sodium fluoride solution (100g / L, about 0.25mL) to the crucible at an angle of °, place the crucible on a heating plate at 250°C and evaporate to dryness for 8 minutes;
[0038] Take off the crucible and let it cool slightly, add 10 drops of hydrochloric acid solution (concentration: 1.19g / mL, about 0.5mL) dropwise along the inner wall of the crucible with a dropper at an angle of 45°, and then add 5 drops of hydrochloric acid solution dropwise along the inner wall of the crucible at an angle of 45°. Drop sodium fluoride solution (100g / L, about 0.25mL), shake the crucible gently, then place the crucible on a heating plate at 250°C and evaporate to dryness for 8 minutes;
[0039] Remove the crucible and place it on a 300°C electric heating ...
Embodiment 2
[0046] Weigh 0.1g±0.1mg of 2# continuous casting mold slag into a sulfur-carbon crucible (Φ×h=25mm×25mm), shake the crucible gently to spread the continuous casting mold slag on the bottom of the crucible, and use a dropper to 45 Add 5 drops of sodium fluoride solution (95g / L, about 0.25mL) to the crucible at an angle of °, place the crucible on a heating plate at 240°C and evaporate to dryness for 7 minutes;
[0047] Take off the crucible and let it cool slightly, add 10 drops of hydrochloric acid solution (concentration: 1.19g / mL, about 0.5mL) dropwise along the inner wall of the crucible with a dropper at an angle of 45°, and then add 5 drops of hydrochloric acid solution dropwise along the inner wall of the crucible at an angle of 45°. Drop sodium fluoride solution (105g / L, about 0.25mL), shake the crucible gently, place the crucible on a heating plate at 260°C and evaporate to dryness for 9 minutes;
[0048] Remove the crucible and place it on a hot plate at 290°C to dry ...
Embodiment 3
[0051] Weigh 0.1g±0.1mg of 3# continuous casting mold flux into a sulfur-carbon crucible (Φ×h=25mm×25mm), shake the crucible gently to spread the continuous casting mold flux on the bottom of the crucible, and use a dropper to Add 5 drops of sodium fluoride solution (105g / L, about 0.25mL) to the crucible at an angle of °, place the crucible on a heating plate at 260°C and evaporate to dryness for 9 minutes;
[0052] Take off the crucible and let it cool slightly, add 10 drops of hydrochloric acid solution (concentration: 1.19g / mL, about 0.5mL) dropwise along the inner wall of the crucible with a dropper at an angle of 45°, and then add 5 drops of hydrochloric acid solution dropwise along the inner wall of the crucible at an angle of 45°. Drop sodium fluoride solution (95g / L, about 0.25mL), shake the crucible gently, then place the crucible on a heating plate at 240°C and evaporate to dryness for 7 minutes;
[0053] Remove the crucible and place it on a 310°C electric heating p...
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