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216 ^11108 Eltr-sf=ql 6! siee ol zJelz)1. E6J Arec "il. yJ B ^J"I zl 3z,fl6.J+. olag d (chill)9 B 4++q ?4o14 r+BsE .J6Iq +Cs-l ,{+€ H€ol E}6ll€4. (b)= 7l]+zl?.ls a +E=4 ol r-l ul.rla|fl1 gzl 9*o o_E, rl]zl] e +Eql= Na ,ll*i-lzlE 6},<1 9+=+. eE C+ tsz+s+= +El^l7l7l 96Iq si+elg tto/oE- € ol-z e +€ g 350"c -tr el g +tr}. A1-SioJ?ql^.1 EfEg a=- Mn "; Feol4. olag Al q sie+ ql4 4.4489E A\Fe(a^J), AluMn(?sl^4) E'= AiSiFe Fg CC+4. 71. Al-Si-CuZl -sr.=el #a 6Ir trB 10-34leJ .J+Hg AC4B(Si 8.5%o, Cu 3.Oo/o, rl4zl Al)gE, =4g E^lE ie ael fzlt4 (a+Si)*eetr +c9q 91tr}. +e sig F=-E-"Jolq, HlvJ€* {(a+AI2Cu)9 AlrCu}ol +E6l Ea Bo} 91tr}. a^}9 Ar-Fe-SiZl E}E}E "t +e sie+ d6J +e€^Jq 9i3 4;ll9 Al-Fe-Mn-SiZl sl6JEol CC+trI. oltrll ^Jq ++ E Alrcu, Al-Fe-Si, A1-Fe-Mn-Siol-J., NaOH 2g, HrO 98cc-tr +!E}gtrI. ol !t+g = .JA^J9 4=rls}e+ 7)Al4 Ceg oJ^J^lA El+gtr^l +=4, 5l+ c, *dc.l +g aJTgE-'J?-l ol*qr, +rg 4 z4 aa$;lz| +zl^Jg_E- e =6I _ a .JF"lts+AE 24. +eg A4 4+ +r+ol= .JF"lts +re+ +?-lel 39 +aetr +r++. AhCu 8ffii At-Fe-Mn-St -Al-Fe-Sl TE ral 10-34 AC4B