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Molten slag surface tension prediction method based on melt structure analysis

A technology of surface tension and structure analysis, applied in surface tension analysis, surface/boundary effects, measurement devices, etc., can solve problems such as activity not being well treated

Active Publication Date: 2021-03-09
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Molten slag surface tension prediction method based on melt structure analysis
  • Molten slag surface tension prediction method based on melt structure analysis
  • Molten slag surface tension prediction method based on melt structure analysis

Examples

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 invention provides a molten slag surface tension prediction method based on melt structure analysis. The molten slag surface tension prediction method comprises the steps of: S1, obtaining the oxygen bond type and the oxygen bond mole fraction of to-be-detected molten slag; and S2, inputting the oxygen bond type and the oxygen bond mole fraction into a pre-trained molten slag surface tension prediction model, and solving the molten slag surface tension prediction model to obtain a predicted value of the surface tension of the to-be-detected molten slag, wherein the molten slag surface tension prediction model comprises a molten slag surface tension prediction equation constructed by considering the formation mechanism of the surface tension of the oxide melt and combining the oxygen bond type and the oxygen bond molar fraction of the molten slag according to thermodynamic equilibrium and the Gibbs free energy theory. The prediction precision and stability of the slag surface tension are improved.

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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IPC IPC(8): G01N13/02G06F30/27G06F119/14
CPCG01N13/02G01N2013/0283G06F30/27G06F2119/14
Inventor 闵义张蕊刘承军
Owner NORTHEASTERN UNIV
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