Acid leaching of alloys within the quaternary system Fe-Si-Ca-Al

被引：21

作者：

Margarido, F

Figueiredo, MO

Queiroz, AM

Martins, JP

机构：

[1] FEUP, DEPT ENGN QUIM, LAB CATALISE & MAT, P-4099 OPORTO, PORTUGAL

[2] Univ Tecn Lisboa, DEPT MAT ENGN, INST SUPER TECN, P-1096 LISBON, PORTUGAL

[3] CTR VALORIZACAO RECURSOS MINERAIS, P-1096 LISBON, PORTUGAL

[4] IICT, CTR CRISTALOG, P-1000 LISBON, PORTUGAL

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1997年 / 36卷 / 12期

关键词：

D O I：

10.1021/ie970295y

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Silicon with high purity and fine particle size can be produced by acid leaching of Fe-Si industrial alloys under the condition that they have adequate chemical composition and structural constitution. Such alloys contain phases that fall within the system Fe-Si-Ca-Al, where a quaternary phase Caalsifer, with approximate formula (Fe(0.8)Al(0.1)square(0.1))(Si0.8Ca0.2)(2), is found along with several binary and ternary phases (Fe-Si, Ca-Si, Al-Fe-Si, Ca-Al-Si). With the purpose of optimizing the phase, constitution alloys were synthesized within the system Fe-Si-Ca-Al. The results of leaching experiments performed using HCl (150 and 220 g/L) at constant temperature (T = 102 +/- 1 degrees C) and ordinary atmosphere indicate that the Caalsifer plus Al-Fe-Si phases should be maximized whereas the FeSi2 phases should be minimized, by controlling Al/Ca and Fe/Si concentration ratios in the synthesis process.

引用

页码：5291 / 5295

页数：5

共 19 条

[1]

AAS H, 1971, A7147 AM I MET ENG, P650

[2]

[Anonymous], 1957, SCI REP RITU

[3]

[Anonymous], METALLURGIE

[4]

Boulos M.I., 1983, U.S. Patent, Patent No. [4,379,777, 4379777]

[5]

CHU TL, 1983, J ELECTROCHEM SOC, V130, P200

[6] HYDROMETALLURGICAL PURIFICATION OF METALLURGICAL-GRADE SILICON [J].

DIETL, J .

SOLAR CELLS, 1983, 10 (02) :145-154

[7]

Hunt L. P., 1976, Twelfth IEEE Photovoltaic Specialists Conference 1976, P125

[8]

HUNT LP, 1976, SOL ENERGY, P200

[9] A STUDY OF THE PURIFICATION OF METALLURGICAL GRADE SILICON [J].

JUNEJA, JM ;

MUKHERJEE, TK .

HYDROMETALLURGY, 1986, 16 (01) :69-75

[10]

KOLFHAATH JA, 1960, Patent No. 2923617

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