Bi tp v tnh n phi liu

Cc bi tp v CT SegeraR2O bRO cR2O3 d RO2

Vi a + b =1

Quy v cng thc Seger

Tnh ton CT Seger t khi lng nguyn liu a vo

Chuyn v CT Seger bi men c thnh phn ha nh sau:

Cho cng thc Seger nh sau

Hy tnh thnh phn % v khi lng cc nguyn liu s dng: Lithage: PbO Cao lanh: Al2O3.2SiO2.2H2O phn: CaCO3 Ct: SiO2 Fensfat: K2O.Al2O3.6SiO2

n phi liu thy tinh c thnh phn nh sau:SiO2 71% Al2O3 1,5%% CaO 8,5% MgO 3,5% Na2O 15,5% Thnh phn ha ca cc nguyn liu: Cat Soda a voi olomit OX NKT SiO2 Na2O 98,5 57,2 1,5 3,2 0,4 CaO MgO Al2O3 Fe2O3 MKN 0,6 0,6 0,2 0,1 42,8 53,9 0,6 44 27 19,2 2,6 0,5 47,5 0,3 98 0,1 1,2

Cho cng thc Seger ca mt loi men nh sau: 0,16K2O 0,25Al2O3 3SiO2

0,84MgO Hy tnh % mi loi phi liu cho vo. Cho bit cc loi phi liu gm: Talc (3MgO.4SiO2.H2O) Orthoklaz (K2O.Al2O3.6SiO2) Caolin (Al2O3. 2SiO2.2H2O) Ct (SiO2)

Tnh ton phi liu xi mng

Ta c:

KH

(%CaO %CaOtudo ) (1,65 Al2 O3 0,35Fe2 O3 0,7SO3 ) 2,8.(%SiO2 %SiO2tudo )

V thnh phn CaO, SiO2 t do sau khi nung clinke thng rt nh, 0,7%SO3 cng tng i nh nn ta c th b qua. Vy 54,83x1 +1,63x2 [1,65(0,78x1+14,58x2) +0,35(0,18x1+7,92x2)] 0,9 ~= 2,8(0,84x1+72,6x2) 208,15x2 51,36x1 =0 V x1 + x2 = 100% => x1 = 80%, x2 = 20%

Lng MKN l: 42,93x1+ 2,27x2 = 34,8% =>Lng cn li l: 65,2% % cc SiO2 sau khi nung: 0,84.80% + 72,6.20% = 23,3% 65,2% Lm tng t vi cc oxit khc ta c bng sau:

Kim tra cc h s: Modul silicat: (1,9 3,2) Modul alumin: (1,5 -2,5) Modul thy lc: ( 1,7 2,3)

S

A

F

C

M

R2O SO3

v sau khi nung clinker, ch cn li R2O v MgO tn ti dng t do, nn ta c: %R2O = 0,36% %MgO = 0,28% C 1SO3 cn 0,7CaO cho 1,7CaSO4 0,2%SO3 cn 0,14%CaO cho 0,34 %CaSO4

C 1F cn 1,4C v 0,64A cho 3,04 C4AF =>2,65%F cn 3,71%C v 1,7%A cho 8,06% C4AF C 1A cn 1,65C to ra 2,65C3A (5,43 1,7)%A 6,15%C 9,88%C3A CaO cn li l: 67,78 (0,14 + 3,71 + 6,15) = 57,78% %SiO2 = 23,3%

V khng cn CaO v SiO2 t do nn ton b C v S to vi nhau thnh khong C3S v C2S C 1% (a)SiO2 kt hp vi 2,8% CaO to ra 3,8% C3S C 1% (b)SiO2 kt hp vi 1,87% CaO to ra 2,87% C2S Ta c h : a + b = 23,3 2,8a + 1,87b = 57,78 a = 15,28, b = 8,02 C3S = 58,06%, C2S = 23,02%

Kim tra li h s bo ha: KH = 0,89