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Fundamental Study on Physical-Chemical Properties

of the Electroslag Remelting Slags

Specialty£ºFerrous Metallurgy Name£º Liu Li

Tutor£ºProfessor Zhao Jun-xue

ABSTRACT

The slag properties have great influence on the product quality, relavant technical and economic index in electroslag remelting process£¬and the slag properties are compactly related with the composition of the slages. It is attested that the slag composition is in changing in electroslag remelting process. The machnism and the influence to the remelting process of this change is not sufficiently studied up to now.the relavant research will be of theoretical and practical to promote electroslag remelting process.

Based on relavant references and investigation, slag ANF-6 is chosen as a basic slag. Combined with the composition change range in remelting process, the slag properties,such as melting temperature£¬viscosities£¬density£¬surface tension and conductivity are measured and studied. Orthogonal test designing are used to the slag melting point measurement and regression equation between slag composition and melting point are obtained. In addtion, the influence of slag composition to melting temperature£¬viscosities£¬density£¬surface tension and conductivity are measured and studied with RWT-10 multi-purpose equipment. The sequence of components are obtained with the influence to different properties listed above .The results of range analysis and variance analysis are well in accordance with each other .

By measurement of slag physical and chemical properties, a lot of basic data are obtained. These can be as references to further research and practicle use for process. Key words: electro-slag remelting, slag composition, slag physical and chemical

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¯ Π/¡æ 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500

ÈÛ Ìå ÎÂ ¶È /¡æ 1463 1463 1463 1463 1463 1463 1463 1463 1463 1463 1463 1463 1463

À­ Ͳ °ë ¾¶ /m 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065 0.0065

²â ¶¨ ³õ ÖØ /g 26.663 26.653 26.658 26.672 26.677 26.739 26.682 26.668 28.324 28.225 28.310 28.333 28.309 28.286 28.266 28.250 28.305 28.257 28.241 28.244 28.210 28.253 28.237 28.205 26.589

×î ´ó ÖØ Á¿ /g 29.532 29.475 29.486 29.522 29.68 29.639 29.542 29.570 32.086 31.876 32.128 31.163 31.33 31.228 31.323 31.324 31.148 31.127 31.378 31.36 31.134 31.156 31.04 31.041 29.453

¼Æ Ëã ÕÅ Á¦ N/m 0.36982 0.37542 0.37790 0.38084 0.40129 0.38752 0.3856 0.3877 0.37885 0.3867 0.37657 0.3779 0.40369 0.39314 0.4085 0.41077 0.37991 0.38351 0.41919 0.41639 0.3933 0.3897 0.3746 0.37897 0.38271

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1 2 3 4 5 6 7 8 9 10 11 12 13

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14 15 16

1500 1500 1500

1463 1463 1463

0.0065 0.0065 0.0065

26.652 26.711 26.782 25.512 26.600 26.532 26.642 29.495 29.665 29.696 29.398 29.411 29.255 29.672 0.37991 0.39474 0.3873 0.38565 0.37563 0.3702 0.3752

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SiO2 % 4 6 8 10

Al2O3 % 18 22 26 30

MgO % 1 3 5 7

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factors

CaF2 50 50 50 50 55 55 55 55 60 60 60 60 65 65 65 65 0.383 0.392 0.392 0.381 0.011

CaO 6 9 12 15 6 9 12 15 6 9 12 15 6 9 12 15 0.380 0.391 0.391 0.386 0.011

SiO2 4 6 8 10 6 4 10 8 8 10 4 6 10 8 6 4 0.379 0.380 0.394 0.396 0.017

Al2O3 18 22 26 30 26 30 18 22 30 26 22 18 22 18 30 26 0.385 0.390 0.392 0.382 0.010

MgO 1 3 5 7 7 5 3 1 3 1 7 5 5 7 1 3 0.395 0.383 0.382 0.388 0.013

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T=6.19 y=0.3868

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500

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9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744 9.17744

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CaF2 50 55 60 65

CaO 6 9 12 15

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Al2O3 18 22 26 30

MgO 1 3 5 7

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Òò ËØ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 K1 K2 K3 K4 R

CaF2 50 50 50 50 55 55 55 55 60 60 60 60 65 65 65 65 2.150 2.155 2.821 3.240 1.090

CaO 6 9 12 15 6 9 12 15 6 9 12 15 6 9 12 15 2.519 2.571 2.741 2.535 0.222

factors SiO2 4 6 8 10 6 4 10 8 8 10 4 6 10 8 6 4 2.623 2.654 2.465 2.625 0.189

Al2O3 18 22 26 30 26 30 18 22 30 26 22 18 22 18 30 26 2.856 2.598 2.545 2.368 0.488

MgO 1 3 5 7 7 5 3 1 3 1 7 5 5 7 1 3 2.669 2.504 2.610 2.584 0.165

µçµ¼ÂÊ 2.45 2.11 2.145 1.895 2.09 1.96 2.515 2.056 2.31 2.865 3 3.11 3.225 3.35 3.305 3.08 T=41.766 y=2.61

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·½²îÀ´Ô´ CaF2 CaO SiO2 Al2O3 MgO

·½²î 3.434 0.125 0.088 0.490 0.056

×ÔÓÉ¶È 3 3 3 3 3

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