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Method for determining melting temperature interval and melting behavior of metallurgical slag

A melting temperature, metallurgical slag technology, applied in the investigation phase/state change and other directions, can solve the problem that the slag melting behavior cannot be observed in real time in situ, the specific melting process of the slag sample cannot be observed, and the slag material loading process is demanding, etc. problem, to achieve the effect of convenient and practical operation, fast detection speed, and vivid results

Inactive Publication Date: 2015-03-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for accurate measurements on sludge samples without any external factors like water being present between them. By controlling how long they are exposed to different temperatures while still keeping their shape stable, these techniques help identify specific types of materials involved in metal production processes. Additionally, the use of videos captured from an infrared camera helps make quicker analysis time compared to current methods. Overall, this technique provides technical benefits over existing technologies.

Problems solved by technology

This patented technical problem addressed in this patents relates to improves understanding how well an accurate analysis tool is needed for studying metallography processes such as continuously cast ingot production. Specifically, current methods require long hours for precise measurements due to poor response times caused by changes in refractory properties associated with rapid temperatures near critical points within the entire process. Additionally, existing techniques have limitations in predicting transition from complete phase to partial phase transitions.

Method used

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  • Method for determining melting temperature interval and melting behavior of metallurgical slag
  • Method for determining melting temperature interval and melting behavior of metallurgical slag
  • Method for determining melting temperature interval and melting behavior of metallurgical slag

Examples

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Embodiment 1

[0053] Accurate determination of melting temperature range of molten iron pretreatment dephosphorization slag and observation of melting behavior.

[0054] The present invention is applied in the measurement of the melting temperature range of the molten iron pretreatment dephosphorization slag and the observation of the melting behavior, and the specific steps are as follows:

[0055] (1) Preparation of dephosphorization slag samples: Mix the molten iron pretreatment dephosphorization slag material in a mortar and put it in a graphite crucible, heat it in an induction furnace to about 1550°C to melt and keep it warm for 10 minutes for water quenching, after drying Grinding to make ≤100 mesh powder slag.

[0056] (2) Determination of loading powder samples: In manual mode, heat the thermocouple to about 580°C, lightly stick about 500 mg of dephosphorization slag sample, shake off the unsticky powder slag, and insert the thermocouple back into the reaction chamber for standby ...

Embodiment 2

[0063] Accurate determination of melting temperature range of continuous casting mold flux and observation of melting behavior.

[0064] The present invention is applied in the measurement of the melting temperature range of continuous casting mold flux and the observation of melting behavior, and the specific steps are as follows:

[0065] (1) Preparation of mold slag samples: Mix the continuous casting mold slag material in a mortar, put it in a graphite crucible, heat it to about 1500°C in an induction furnace, melt it and keep it warm for 10 minutes for water quenching, and grind it after drying. ≤100 mesh powder slag.

[0066] (2) Equip the powder sample: heat the thermocouple to about 520°C in manual mode, lightly stick about 500mg of mold powder slag sample, shake off the unsticky powder slag, and insert the thermocouple back into the reaction chamber for standby. After the temperature drops to room temperature, switch the manual mode to the automatic mode; then accord...

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Abstract

The invention provides a method for determining the melting temperature interval and the melting behavior of metallurgical slag and belongs to the technical field of detection of metallurgy materials. According to the method, a thermocouple has dual functions of directly heating a slag sample and directly measuring the temperature of the slag sample simultaneously, the specific melting temperature interval of the metallurgical slag sample is determined according to the characteristic that the slag sample needs to absorb heat during melting and the principle that an absorption peak is produced due to the fact that the slag sample temperature actually acquired by the thermocouple deviates from the target temperature of a set temperature rise curve, and then a characteristic video image, which is synchronously observed and recorded by an imaging system, of the change of the metallurgical slag during heating is intercepted so as to represent the specific change behavior of the metallurgical slag sample during melting in the time range corresponding to the determined melting temperature interval of the metallurgical slag sample. The method has the advantages that the method is simple and convenient to operate, measuring results are direct and accurate, the detection speed is high and the application range is wide, and the method can be used as a novel important detection means for accurately and effectively evaluating high-temperature characteristics of different metallurgical slag samples.

Description

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Claims

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Application Information

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Owner CENT SOUTH UNIV
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