CNG NGH XI MNGCNG NGH XI MNG Bch khoa 09.2003TS. T Ngc Dng

S cng nghCNG NGH XI MNG Bch khoa 09.2003

Gii thiuCng ngh truyn thng. Nguyn l c bn hu nh khng thay i trong thi gian di.C nhng tin b ng k v+ Gim nng lng tiu tn.+ Gim v c bn s nhim mi trng.

CNG NGH XI MNG Bch khoa 09.2003

Gii thiuTrong khong 30 nm tr li, c s tin b c bit nhanh v:+ K thut t.+ K thut nghinCNG NGH XI MNG Bch khoa 09.2003

Gii thiuTrc ht l s pht minh ra canxin, lm tng ng k nng sut l.Th hai l vic pht trin my p trc v my nghin ng. ng thi l vic s dng cc thit b phn ly ng i mi.Tip l vic ng dng iu khin t ng mi qu trnh sn xut, bao gm c l, lm gim nhn cng v tng tnh n nh ca h thng, ng thi cng em li nhng s tit kim nht nh v nng lng..

CNG NGH XI MNG Bch khoa 09.2003

Gii thiuV nhim mi trng, khng ch c:+ Lng bi gim cn 0,20,3 g/kg xi mng.+ NOx cn 1200ppm /m3 kh l.+ SO2 cn 400ppm /m3 kh l.+ CO cn 500ppm /m3 kh l.Trong cc canxin c bit, NOx < 400ppm.Vn cn tn ti ch l lng CO2 trong kh thi.Hng pht trin: s dng nhin liu thay th, t rc thi.CNG NGH XI MNG Bch khoa 09.2003

Phi liuCNG NGH XI MNG Bch khoa 09.2003

THNH PHN HOCNG NGH XI MNG Bch khoa 09.2003

Hm lng 6269%Tham gia to tt c cc khong chnh ca clinke XMPCaOtd nh hng xu ti cht lng CL v XMPNhiu CaO, ng rn nhanh, mc cao, km bn trong mi trng xm thc

CaOThnh phn ho ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Hm lng 1726%Tham gia to cc nhm khong silict (khong kh nng chy) ca clinke XMPNhiu SiO2, ng rn chm, mc cao, bn trong mi trng xm thc

SiO2Thnh phn ho ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Hm lng 410%Tham gia to cc khong nng chy (alumint canxi v alumoferit canxi) Nhiu Al2O3, ng rn nhanh, to nhiu nhit, km bn trong mi trng xm thc, tng nht pha lng clinke

Al2O3Thnh phn ho ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Hm lng 0.15%Ch yu tham gia to khong nng chy alumoferit canxiNhiu Fe2O3, gim mc xi mng, tng bn trong mi trng xm thc, gim nht pha lng clinke, gim nhit nung clinke

Fe2O3Thnh phn ho ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Gm Na2O v K2O. Tng hm lng 0.15% nhit cao bay hi mt phn, mt phn tham gia phn ng to cc khong cha kimNhiu R2O, gim mc xi mng, khng n nh th tch, gy loang mu (nu dng lm va trt), n mn ct thp

R2OThnh phn ho ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Hm lng 01% nhit cao sinh kh SO2 bay ra mt phn, mt phn tham gia phn ng to cc khong cha SO3, lm gim hm lng mt s khong chnhNhiu SO3, gim mc xi mng, to cc hp cht c nhit nng chy thp gy hi cho h thng l (ch yu l c h cyclon trao i nhit)Cng vi R2O gy nh hng xu ti qu trnh nung luyn cng nh tnh cht khong ho v xy dng sau ny ca xi mng

SO3Thnh phn ho ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

THNH PHN KHONGCNG NGH XI MNG Bch khoa 09.2003

Cng thc ho 3CaO.SiO2Khi lng ring 3.28g/cm3Hm lng 4060%C3S tinh khit ch tn ti trong phng th nghim. Trong clinke cng nghip C3S tn ti di dng dung dch rn bn vi tn gi l Alt54CaO.16SiO2.MgO.Al2O3Ca106Mg2Al(Na0.25K0.25Fe0.5)O36(Al2Si34O104)C3S tinh khit bn trong vng nhit 125019000C, di 12500C b phn huC3S C2S + CtdC3S tinh khit c tinh th hnh lc gic uKhong alt ng rn nhanh, to nhiu nhit, khng bn trong mi trng xm thc (c bit l mi trng sunpht)

C3SThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Cng thc ho 2CaO.SiO2C 4 dng th hnh , , , Khi lng ring ca cc dng ln lt l 3.04; 3.40; 3.28; 2.97g/cm3Hm lng 1535%C2S tinh khit ch tn ti trong phng th nghim. Trong clinke cng nghip C2S tn ti di dng dung dch rn bn vi tn gi l BltCa87MgAlFe(Na0.5K0.5)(Al2Si42O180)

C2SThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Dng C2S tn ti trong vng nhit 142521300C.Dng C2S tn ti trong vng nhit 83014250C. Di 8300C, chuyn v dng C2S nu lm lnh nhanh, v dng C2S nu lm lnh chm (km theo tng 10% th tch)Dng C2S km bn, tn ti trong vng nhit 6758300C Lu lu 6750C hoc h nhit xung di 6750C, chuyn v dng C2S (v tng th tch)Dng C2S tn ti trong vng nhit di 6750C

C2SThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Kh nng kt dnh (theo quan im ho hc tinh th) gim dn t dng ti Ch c dng v c th tn ti trong iu kin thng. Ch dng l cn.Cc bin php n nh dng :+ Lm lnh nhanh+ To dung dch rn bn, nn l C2S. l BltBlt t to nhit, mc cao, bn trong mi trng xm thc

C2SThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Gm mt dy dung dch rn (C3A, C5A3, C12A7, CA, CA2, CA6), trong ch yu l C3ACng thc ho 3CaO.Al2O3Khi lng ring 3.04g/cm3Hm lng 515%C3A tinh khit ch tn ti trong phng th nghim. Trong clinke cng nghip trong mng li C3A cn ho tan nhiu xt khcNa6K2Ca78Mg4(Al44Fe8Si7O180)C3A ng rn nhanh, to nhiu nhit, khng bn trong mi trng xm thc

CxAyThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Gm mt dy dung dch rn (t C6A2F ti C6AF2), trong ch yu l C4AFCng thc ho 4CaO.Al2O3.Fe2O3Khi lng ring 3.77g/cm3Hm lng 1018%C4AF ng rn chm, cng khng cao, bn trong mi trng xm thc

CxAyFzThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Gm cc khong KC23S12 (gc C2S) v NC8A3 (gc C3A)Cng thc ho K2O.23CaO.12SiO2 vNa2O.8CaO.3Al2O3S hnh thnh cc khong cha kim lm gim hm lng cc khong silict, tng vi t do12C3S + K KC23S12 + 13Ctd (1)12C2S + K KC23S12 + Ctd (2)3C3A + N NC8A3 + Ctd (3)

Khong cha kimThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

C 1% K2O to ra khong 20% KC23S12 v lm gim khong 20% (C3S + C2S)C khong 1% Na2O to ra khong 10% NC8A3 v lm gim khong 10% C3AKhi nung c mt CaSO4 cc khong cha kim b phn huKhong cha kim lm xi mng ng rn khng n nh

Khong cha kimThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

C2S.CaSO4, 3CA.CaSO4CS, C3S2CAS2, C2AS...MA, M2S, CMS, C3MS2...C3T2, C3P...Cc xt t do CaO, MgO, Cr2O3...

Khong khcThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

Hm lng 510%Lng v thnh phn ph thuc tc lm lnh, thnh phn ho phi liuLng SiO2 ch chim khong 7%, cn li l cc xt khc: CaO, Al2O3, MgO... vi cc lin kt Al-O, Ca-O, Mg-O..

Pha thu tinhThnh phn khong ca clinke xi mng PooclngCNG NGH XI MNG Bch khoa 09.2003

H S & MODUN C TRNGCNG NGH XI MNG Bch khoa 09.2003

Khong gi tr thng thng 0.850.95nh ngha:

H s bo ho viKHCc modun, h s c trng Cng thc y Cng thc rt gnCNG NGH XI MNG Bch khoa 09.2003

Khong gi tr thng thng 90100nh ngha:

H s bo ho viLSFCc modun, h s c trng Cng thc y Cng thc rt gnCNG NGH XI MNG Bch khoa 09.2003

Khong gi tr cho php 13Khong gi tr thng thng 22.6 ngha:

Modun Silicatn (MS)Cc modun, h s c trng Cng thcCNG NGH XI MNG Bch khoa 09.2003

Khong gi tr cho php 13Khong gi tr thng thng 1.41.7 ngha:

Modun Aluminp (MA)Cc modun, h s c trng Cng thcCNG NGH XI MNG Bch khoa 09.2003

p nguyn liuTrong nhng nm gn y khng c thay i ln.Ch yu dng cc my p ba 1 hoc 2 rto hoc my p xung.Khi vt liu rt cng th kt hp p hm vi p trc hoc p cn.Nhng ci tin mi nht cho php kch thc v m vt liu vo my p ba v p xung ln hn ( m tng t 10% ti 20%, khi lng cc vt liu cp cho my c th ti 7 tn)Ti cc m , gii php kinh t nht thng dng l cc my p di ng.CNG NGH XI MNG Bch khoa 09.2003

Nghin liuC nghin chu trnh kn/chu trnh h.C my nghin bi, nghin ng, nghin Horomill...Gn y, h thng nghin thng km theo my nghin s b, ph bin l my nghin con ln.Khong 10 nm tr li y, vic dng nghin ng nghin liu tr nn ph bin hn do tiu th nng lng ring thp hn v sy c vt liu c m cao hn so my nghin bi.

CNG NGH XI MNG Bch khoa 09.2003

Nghin liuTrong nhng nm gn y, c cc ci to v vt liu ch to my nghin nn cc lp lt c tui th rt cao (6000 n 16000h), v lm vic ti nhit 6000CV mt cng ngh, phi liu sau nghin cn: + mn phi t 150m phi

Phn lyDng phn ly nh hng n hiu sut v tiu tn nng lng my nghin.Hiu sut phn ly cng nh hng tng t.

CNG NGH XI MNG Bch khoa 09.2003

Phn lyKh nng phn ly th hin trn ng cong Tromp.Cc phn ly i mi cho php tng nng sut khong 3032% v gim nng lng tiu th khong 2030%.CNG NGH XI MNG Bch khoa 09.2003

ng nht s bng nht rt quan trng v liu cp cho l phi rt n nh v thnh phn ho. vn hnh l n nh cn dao ng ca LSF

CNG NGH XI MNG Bch khoa 09.2003Thit b PGNAA

ng nht tinhC nhiu phng php.ng nht lin tc bng kh nn, dng iu khin c l phng php thng dng nht hin nay.H s ng nht ca cc sil ng nht mi khong 7 n 10.CNG NGH XI MNG Bch khoa 09.2003

Nung clinkePhng php kh chim u th do tiu tn nhit ring nh (khong 720 kCal/kgCL) so phng php t (>1350 kCal/kgCL).S tng trao i nhit ph thuc m nguyn liu.T l L/D gim. L mi ch cn 2 b c ci tin v cu trc cc cyclon trao i nhit, cho php gim st p.CNG NGH XI MNG Bch khoa 09.2003

Nung clinkeS ra i ca canxin gip nng sut l tng khong 2,5 ln.Cng ngh canxin c hai dng, mt dng c dng gi 3 v mt dng ly gi qua l.Mc canxi ho trong canxin khng ln hn 9095%, trnh qu nhit v tn tht nhit ln ti canxin.CNG NGH XI MNG Bch khoa 09.2003

Nung clinkeCu trc canxin c nhng ci tin ng k, c bit v mt gii hn nhim mi trng.

CNG NGH XI MNG Bch khoa 09.2003

Nung clinkeCho php gim 70%NOx t l ra.Gim CO sau canxin ch cn 100 200ppm khi CO ra khi kh l l 3%CNG NGH XI MNG Bch khoa 09.2003CO+NOCO2+ N2H2+NO N2+H2O1 H2+NONH3+H2ONH3 N2+1 H2

Lm lnhLm lnh nh hng ln ti tiu tn nhit ca l v cht lng xi mng.Qu trnh lm lnh din ra trong my lm lnh.C 3 dng my lm lnh + Kiu quay + Kiu hnh tinh + Kiu ghiKiu quay v hnh tinh, lng gi lm mt clinke ch t 0,850,95 Nm3/kgCL nn nhit clinke ra cao (>1500C).CNG NGH XI MNG Bch khoa 09.2003

Lm lnhKiu ghi t 2,5 Nm3/kgCL nn nhit clinke ra ch cao hn mi trng khong 500C.Ngy cng ph bin dng my p trc trong my lm lnh kiu ghi.My lm lnh mi nht cho nng sut 100T/m2.ngy m. Loi tr c hin tng dng sng .Kh tha t my lm lnh kiu ghi c dng sy liu, than, x hoc pht in. gim lng kh ny, to vng tun hon ca kh trong my lm lnh.CNG NGH XI MNG Bch khoa 09.2003

Nghin xi mngPh bin nht l nghin bi.Cc my nghin bi hin i thng c hai khoang. Khoang 1 p, c cc tm lt nng. Khoang 2 nghin, c lt cc tm lt phn loi. Vch ngn gia cc khoang cng dc ci tin khng ngng.Chuyn sang nghin theo mch kn, cho php gim nng lng, tng nng sut khong 20% so mch h.CNG NGH XI MNG Bch khoa 09.2003

Nghin xi mngNghin bi hiu sut thp, phn ln nng lng chuyn thnh nhit nng nn gn y pht trin cng ngh s dng nghin ng nghin xi mng, c nghin bn hon tt ln nghin hon tt.H nghin bn hon tt kt hp nghin ng v nghin bi cho php tng nng sut nghin 3060%, tit kim nng lng 1525%.Tuy nhin p lc nghin ca nghin ng cn kh cao (max 350MPa), vt liu lt t tin nn gn y bt u pht trin th h my nghin mi.CNG NGH XI MNG Bch khoa 09.2003

Nghin xi mngMy nghin Horomill chy vi p lc khong 4070MPa, tiu tn nng lng ring thp hn nghin ng.My nghin Horomill chy vi p lc khong 4070MPa, tiu tn nng lng ring thp hn nghin ng.Cht lng xi mng ca cc my mi v my nghin bi truyn thng l hon ton c th so snh vi nhau. Tuy nhin sn phm ca nghin ng i hi nc tiu chun cao hn mt cht.CNG NGH XI MNG Bch khoa 09.2003

T ng hoQu trnh cng ngh v cc thit b c kh sn xut xi mng tr thnh mt h thng ng b.Cht lng, tnh a dng sn phm, bo v mi trng, cc nhin liu thay th v qun l nng lng l nhng vn i hi s quan tm hn na ca ngi qun l nh my. y l l do chnh a my tnh vo h tr iu khin qu trnh v qun l h thng thng tin.CNG NGH XI MNG Bch khoa 09.2003

T nghoT ng ho trong nh my xi mng c bc tin di, t ch t ng ho tng phn tin n t ng ho ton b dy chuyn cng ngh.CNG NGH XI MNG Bch khoa 09.2003