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A Prediction Method of Slag Surface Tension Based on Melt Structure Analysis

A technology of surface tension and structure analysis, applied in the direction of surface tension analysis, surface/boundary effects, measuring devices, etc., can solve problems such as poor activity

Active Publication Date: 2021-09-14
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Butler determined the surface tension of a multi-component liquid mixture based on the property that the chemical potentials of the components are equal in the bulk phase and the surface phase, but the activity in the model was not well handled

Method used

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  • A Prediction Method of Slag Surface Tension Based on Melt Structure Analysis
  • A Prediction Method of Slag Surface Tension Based on Melt Structure Analysis
  • A Prediction Method of Slag Surface Tension Based on Melt Structure Analysis

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Experimental program
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Effect test

Embodiment 1

[0081] Sample preparation: choose calcium oxide, magnesium oxide, silicon dioxide, ferrous oxalate dihydrate, and phosphorus pentoxide chemically pure reagents, and replace ferrous oxide with ferrous oxalate dihydrate. The experimental slags were prepared by changing the contents of calcium oxide, magnesium oxide, silicon dioxide, and phosphorus pentoxide, respectively, which were denoted as CMSFP1-CMSFP5. The specific components of the experimental slags were shown in Table 1, and the specific preparation methods were as follows:

[0082] Table 1 CaO-MgO-SiO 2 -Fe x O-P 2 o 5 Composition of experimental slag (mass fraction, %)

[0083]

[0084] 101. Put calcium oxide, magnesium oxide, and silicon dioxide pure reagents in Next calcined, spare.

[0085] 102. Weigh 3g of mixed chemical reagents as shown in Table 1, put them into a platinum crucible, and hang them in a high-temperature quenching furnace with a molybdenum wire, then feed 0.8L / min high-purity argon gas, an...

Embodiment 2

[0132] Sample preparation: choose calcium oxide, silicon dioxide, aluminum oxide, and ferrous oxalate dihydrate chemically pure reagents, in which ferrous oxide is replaced by ferrous oxalate dihydrate. The experimental slags were prepared by changing the contents of calcium oxide, silicon dioxide, aluminum oxide, and ferrous oxalate dihydrate, which were respectively recorded as CSAF1~CSAF10. The specific components of the experimental slags are shown in Table 2. The specific preparation methods are as follows:

[0133] Table 2 CaO-SiO 2 -Al 2 o 3 -Fe x The composition of O experimental slag (mass fraction, %)

[0134]

[0135] 101. Calcinate the pure reagents of calcium oxide, silicon dioxide and aluminum oxide at 600°C for later use.

[0136] 102. Weigh 3g of mixed chemical reagents as shown in Table 2, put them into a platinum crucible, and hang them in a high-temperature quenching furnace with a molybdenum wire, then feed 0.8L / min high-purity argon gas, and heat up...

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Abstract

The present invention provides a method for predicting the surface tension of molten slag based on melt structure analysis, comprising: S1, obtaining the oxygen bond type and oxygen bond mole fraction of the molten slag to be tested; S2, inputting the oxygen bond type and oxygen bond mole fraction in advance The trained slag surface tension prediction model, and solve the slag surface tension prediction model to obtain the predicted value of the slag surface tension to be measured; the slag surface tension prediction model includes the thermodynamic balance and Gibbs free energy theory, considering The formation mechanism of the surface tension of oxide melt, and the prediction equation of the surface tension of slag constructed by combining the oxygen bond type and the oxygen bond mole fraction of the slag. Improve the prediction accuracy and stability of slag surface tension.

Description

technical field [0001] The invention relates to the technical field of slag physical properties and melt structure, in particular to a method for predicting slag surface tension based on melt structure analysis. Background technique [0002] In the process of modern iron and steel smelting, slag plays an irreplaceable metallurgical function in the absorption of non-metallic inclusions, deoxidation, desiliconization, desulfurization, dephosphorization, etc. Surface tension, as an important parameter in the study of steel-slag interface reaction, reflects the shrinkage force between phase interfaces and affects the emulsification and separation of steel-slag, removal of inclusions, foaming operation, etc. The slag needs to fully absorb the inclusions and not be involved in the molten steel. It needs a large surface tension to reduce the adhesion work between steel and slag, so as to reduce the slag entrainment. However, excessive surface tension means that the energy consumpt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/02G06F30/27G06F119/14
CPCG01N13/02G01N2013/0283G06F30/27G06F2119/14
Inventor 闵义张蕊刘承军
Owner NORTHEASTERN UNIV LIAONING
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