TRNG I HC CNG NGHIP TP H CH MINH

KHOA CNG NGH HA HC

TIU LUN: PHN TCH CNG NGHIP TI : XC NH THNH PHN CaO V MgO TRONG XI MNG

GVGD : ThS Trn Nguyn An Sa. SVTH : L Th Ngc Bch. Lp : DHPT5.

NI DUNG1 TNG QUAN V CaO V MgO

2

NGUYN TC

3

QUY TRNH

4

TNH TON KT QU

1. TNG QUAN V CaO V MgO. Thnh phn ha hc: CaO: 63 - 66%; Al2O3: 4 - 8%; SiO2: 21 - 24%; Fe2O3: 2 - 4%. Ngoi ra cn c mt s

oxyt khc nh MgO; SO3; K2O; Na2O; TiO2; Cr2O3;P2O5,... Chng chim mt t l khng ln nhng t nhiu u c hi cho xi mng

2. NGUYN TC. St, nhm, titan v cc ion cng tr khc c tch khi canxi v magie bng amoni hydroxit.

Chun canxi bng dung dch EDTA tiu chun pH >12vi ch th fluorexon, im tng ng dung dch chuyn t mu xanh chuyn sang mu hng.

Chun tng lng canxi v magie trong mu bng dungdch EDTA tiu chun theo ch th eriocrom T en pH = 10,5. xc nh hm lng magie oxit theo hiu theo hiu s th tch EDTA tiu th.

3. QUY TRNH.

3.1

Giai on loi st, nhm v titan.

3.23.3 3.4

Xc nh tng hm lng CaO v MgO.Quy trnh xc nh hm lng CaO. Quy trnh xc nh hm lng MgO.

3.1

Giai on loi st, nhm v titan.

3.2

Xc nh tng hm lng CaO v MgO.

25 ml dd B Thm 50 ml nc ct, chnh pH=10

Thm 10 ml dd m pH=10 , 2 ml dd KCN 5%, ch th ETOO 1%

Dd t mu nho chuyn sang xanh chm

3.3

QuyS .

trnh

xc

nh

hm

lng

CaO.

25 ml dd B

Dd chun EDTA 0,01M (V1)

50 ml nc ct, 10 ml dd KOH 25%, 2 ml dd KCN 5%, ch th fluorexon 1% Dd chuyn sang mu hng CaCO3 CaO + CO2 + Q

CaO + H2O = Ca(OH)2

+ Q.

3.4

Quy

trnh

xc

nh

hm

lng

MgO.

Dung dch B

80 ml nc ct, 15ml dung dch m PH = 10.52ml dung dch Kalixyanua 5%, ch th ericrom T en 1%

dung dch chun EDTA 0.01% (V2)

Mu ru nho sang nc binMgCO3 CO2 +MgO

4. Cng thc tnh CaO.

Hm lng CaO tnh bng phn trm theo cng thc:

0.00056V2 k %CaO 100 m Trong : K: l h s pha long V1: th tch EDTA 0,001M tiu tn xc nh tng Ca v Mg ml 0,00056: khi lng CaO tng ng vi 1ml dd EDTA 0,01M, m: khi lng mu tng ng vi th tch mu ly nh caxi oxit, tnh bng g.

4. Cng thc tnh MgO. Hm lng MgO tnh bng phn trm theo cng thc:

0,000403 V1 V2 k %MgO 100 m Trong : 0,000403: khi lng MgO tng ng vi 1ml dd EDTA 0,01M, g. V2: th tch dd EDTA 0,01M tiu tn chun tng canxi, ml. K: h s pha long. m: khi lng mu th.

Ti liu tham kho. TCVN 141 : 2008 TCVN 141: 1998 Gio trnh phn tch cng nghip, TT CNHH, HCN TP.HCM

Hong Minh Chu T Vng Nghi, C S HaHc Phn Tch, NXB Khoa Hc V K Thut, 2002