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Refractory material use performance evaluation method and system based on limit thermal load

A technology for refractory materials and evaluation methods, which is applied in special data processing applications, instruments, design optimization/simulation, etc. The effect of accurate thermal stability

Pending Publication Date: 2021-07-30
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a method and system for evaluating the service performance of refractory materials based on extreme thermal load, and its purpose is to solve the problem that the existing technology cannot simply, quickly and accurately evaluate the service performance of refractory materials question

Method used

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  • Refractory material use performance evaluation method and system based on limit thermal load
  • Refractory material use performance evaluation method and system based on limit thermal load
  • Refractory material use performance evaluation method and system based on limit thermal load

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Select 10mg refractory material (75wt% SiC and 25wt% Al 2 o 3 ) as the refractory material to be tested, the refractory material to be tested is heated by a non-isothermal heating method (continuous heating within 25 to 1500 °C, and the heating rate is 20 °C / min) (oxidizing atmosphere: 21% O at 100 ml / min 2 / 79%N 2 ,) to obtain a DSC curve;

[0045] (2) Obtain comprehensive parameters for evaluating the service performance of the refractory material to be tested through the DSC curve, including the limit temperature T of the refractory material max , limit heat load Q max , average heat load Instantaneous heat flow acceleration q' per unit mass refractory material and average heat flow acceleration per unit temperature difference per unit mass refractory material

[0046] The calculation process of the above parameters is as follows:

[0047] ① Obtain the corresponding temperature when the heat flow of the DSC curve reaches the maximum value, and obtain the...

Embodiment 2

[0060] This example is roughly the same as Example 1, except that in this example, the mixed ash obtained by mixing the refractory material and coal ash with a mass ratio of 1:1 is used as the refractory material to be tested; wherein, the coal ash is selected from Hongshaquan ash , Prepared in an air atmosphere at 500°C. Ash components were measured by X-ray fluorescence spectrometry (XRF), and the results are shown in Table 2.

[0061] Table 2

[0062]

[0063] Also adopt the method in embodiment 1 to calculate, obtain a DSC curve, specifically, such as image 3 Shown is the thermal analysis diagram of the refractory material to be tested in this embodiment, and then the performance parameters of the mixed ash are obtained, as shown in Table 3.

[0064] table 3

[0065]

[0066] Comparing Table 1 in Example 1 and Table 3 of the present embodiment shows that the addition of red sand spring ash has a significant effect on the limit temperature T max The effect is sma...

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Abstract

The invention discloses a refractory material use performance evaluation method and system based on an extreme thermal load. The method comprises the following steps: S1, heating a to-be-detected refractory material by adopting a non-isothermal heating method, and collecting a DSC curve of the refractory material in the heating process by adopting a differential scanning calorimetry; s2, obtaining use performance parameters of the refractory material based on the DSC curve so as to evaluate the use performance of the refractory material; wherein the use performance parameters of the refractory material comprise the limit temperature Tmax of the refractory material, the limit heat load Qmax, the instantaneous heat flow acceleration q'of the average heat load unit mass of the refractory material and the average heat flow acceleration under the unit temperature difference of the unit mass of the refractory material; the use performance of the refractory material is represented from the perspective of heat, the thermal stability and the thermal shock resistance can be accurately represented, the service life of the refractory material can be reflected, and the use performance of the refractory material can be simply, rapidly and accurately evaluated.

Description

technical field [0001] The invention belongs to the field of refractory material evaluation, and more particularly, relates to a method and system for evaluating the service performance of refractory materials based on extreme thermal load. Background technique [0002] Refractory materials are widely used in high-temperature industrial production such as electric power, steel, non-ferrous metals, glass, etc., as a material used at high temperature. Accurate evaluation of its performance in use is crucial for its industrial applications. Several important evaluation methods include evaluation of refractoriness, evaluation of softening temperature under load, evaluation of oxidation resistance, evaluation of slag resistance and evaluation of thermal shock resistance. Among them, thermal shock resistance, also known as thermal stability and thermal shock resistance, represents the performance of materials and their products against severe temperature changes without damage or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02G06F119/08
CPCG06F30/20G06F2119/08G06F2119/02
Inventor 傅培舫刘洋别康许天瑶
Owner HUAZHONG UNIV OF SCI & TECH
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