Giải pháp trung hòa và ổn định chất lượng quặng sắt cho sản xuất gang lò cao tại công ty cổ phần gang thép thái nguyên

KHOA HOC KINH T £ V A QOAN Lt NGANH M J^^ GIAI PHAP1RUNG HOA VA ON DjNH CHATUJDNG QUANG SAT CHO SAN X U A T GANG LO CAO TRI CONG TV CO PH^N GRNG TH€P THAI NGUVCN TS NGHIEM GIA - Tong Cong ty Thep Vigt Nam KS N G U Y I N VAN CHUNG, KS N G U Y I N MINH HUNG Cong ty Cd phin Gang titdp Thai Nguydn H hu d u si> dgng nguydn lidu cho luydn gang Ld cao cOa Cdng ty C l phin Gang thdp Thdi Nguydn (TISCO) giai dogn 2015-2030 tdng cao, dd qu$ng sat g i n 2.000.000 tIn/ndm Nhung vipc ddp ung nhu d u quang sdt dang g$p khd khdn vi cde 1;^ sau ddy: 8 mm duqc chuyen qua hSnh lang bang tai s6 vd so xuong b3i trung hda; •:• TCr bai trung h6a qu|ng duiyc chuyin xudng hSm li#u dd 17 a6ng, sau 36 du'g'c chuyen qua bSng tai ng^m so 6, s6 vS s6 qua sSng rung (kilu m i t cSo) 8x10 mm d l sang loai bo cO hat 0+8 mm (qujng cd hat 0+8 mm nSy dup'c 6t6 chuyen sang ISm nguygn li$u cho thieu kit qujng), qu|ng tilp tgc chuyin qua b§ng tai tdi bunke 16 cao D$c dilm cua bai trung hod: Lu'O'ng chCra 100.000 tin Kich thudc dai 320 m (tCr mdng nhjn dlti bdng tai s6 chieu cao cua bdng tai 15 m), chllu rSng 60 m Bai trung hod c6 chifeu cao h?n chi n§n lug'ng qujng v l nhilu phai dCing mSy 01 san ngodi, d l l i n giira cdc loai qu$ng vdi nSn hi$u suit trung hod thIp ^ 5.2 Giai phip trung hoa cdc tfr sin xuat vi coc nhap ri> Trung Qudc Do OC san xuit tai TISC vd c6c nhdp tCr Trung Quic c6 chit lugrng khdng ding deu (vl cd hat vj thdnh phin hod hgc) n§n chiing se dug'c tai rieng v| bunke 16 cao cua kho chira bgn phai vd kho chi>a bgn trdi Cdn 00* vdo chit lug'ng, cSr hat d l trung h6a vd phii ligu vdo 16 cao theo ty Ig hg'p 1;^ cho 16 c% vdn hdnh I n dinh B l dam bao chit lug'ng trud'c l { { nap vdo 16, d o qua sdng rung d l loai bd C6c vgn c6 c6' hat 0+15 mm S6 cic vgn ndy diing ldm nhl6n ligu cho san xuat qudng thigu kit Hdnh lang bdng tai riii qudng M$tcltA-A Qu$ng chit thdnh ding Boong ke /////// AI \ Bunke / \ Bunke / / / / ////// // / Bdng tai c h U y l r U l g u j ^ ^ j i ^ ^^ H.2 Sa dd tmng hda qudng sit theo PP3 - Phuang phdp bdng tdi 5.3 GUI phip trung hoa nguydn lidu trg dung Trg dung diing cho 16 cao Thdi Nguygn chii yiu Id Dd vdi, Ddldmit, Quiczit Mli loai trg dung dugc v§n chuyin bing dtd v l bai trung hod dd dong sau dd diing glu ngoam vun thdnh dong cao vd se dugc vdn chuyin bing bdng tai (sl 6, so 7) vd xulng cdc bdng tai nglm (s6 vd so 9) d l vdo bunke Id cao (H.2) 5.4 GUI phap on djnh chit lugng nguyen ll^u phoi Tidu vao Id cao Cdc loai nguygn ligu sau da tmng hod d l tai v l cdc bunke 16 cao se dugc phan tich thdnh phin hod hgc theo tirng 16 hang d l dua giai phdp I n djnh chit lugng Cdn cir vdo thdnh phan hod hgc, Chung loai nguyen ligu, ygu clu chit lugng nlu luygn d l phoi ligu vdi ty Ig (%) hgp ly nhlm dam bao vdn hdnh 16 dugc thu§n Igi, luygn dugc mdc gang hgp cdch, dat cdc chi tigu kinh t l ky thugt Chit lugng nguygn ligu trung hod cdng tot thi s l lin lly ligu d cdc bunke cdng it Ngodi tn/dc phoi li$u vdo 16 cao, cdc nguygn ligu c6n phai qua sdng mng d l loai bd cd' hat vyn (dll vdi qu^ng loai CONG NGHIEP MO Sfi 1-2015 bd eg hat 0+8 mm vd cic loai bd cd hat 0+15 mm) Loai qudng vgn vd cic vgn ndy se dugc chuyin sang ldm nguygn li$u cho sdn xuit qudng thigu kit vd luy^n hgp kim Fero Cdc giai phdp ndng cao chit iu^ng qu^ng sdt, qu^ng thigu k i t va cdc cho sdn xudt gang theo cong ngh| Lo cao cua TISCO 6.1 GUI phdp ning cao chat lurgng qu$ng sk a) Qli vdi khdu khai thdc Q l dam bao t9 Ig khai thdc qu$ng manhetit vd limonit theo cdn dll nhu clu qu0ng sdt cOa TISCO da tiln hdnh: l|ip kl hoach khai thdc chi tilt cdc md qudng sit hdng ndm vd k l hoach ndm; D i u tu d i i mdi cdng nghg khai thdc xiic bIc d l dam bao khai thdc c6 chgn lgc (nhlm han c h i lugng dit dd phai xuc khai thdc) Giai phdp ndy dd dugc md Tr?i Cau thg'c hign tCr ndm 2007 bing vigc mua 01 mdy xdc thuy luc gdu ngugc cua M} (hdng Caterpillar) b) Khdu tuyin qu^ing B l giam dit chay qudng sit, d n thilt thuc hign mgt s l khdu sau: dam du lugng nudc d p cho xudng tuyin theo JQ2Q KHOA HOC KINH TE VA QUAN Lt NGANH M djnh mt>c thilt k l ; b l sung mdy ddnh toi vd mdy n>a cdnh vudng hg thing ddy chuyin cdng nghg cua xudng tuyin Trai Cau; c) Chuin bj qudng sdt tai Nhd mdy Luygn gang tnrdc phoi ligu: d l han che cdc nhuge diem qud trinh khai thdc vd tuyin qudng sit khdng t h i khic phgc dugc, nh6m nghign cd'u dd dp dgng mgt s l bign phdp tai Nhd mdy Luygn gang cua TISCO nhu sau: ^ Sdng quang trud'c trung hoa: Thuc t l lugng qudng cdm (0+8 mm) chilm 10 % ting lugng qu^ng sit chuyin ve Qu^ng cdm dudi sdng se diing ldm nguygn ligu san xuit qudng thigu kit Qudng trgn sdng dugc chuyen qua hg thdng bdng tai dua xuong bdi tnjng hod qu^ng s i t Phuong phdp ndy cd uu dilm: vira ldm gidu qudng vCra phdn d p cd hat thudn Igi cho vigc ldm ding diu qudng; loai trir ed hat vgn trudc trung hod iuu hu}nh I n djnh hern, it phai dilu chinh chi dg xi, id It treo sgt ligu kilm cao hay suit lugng xi cao; Ty Ig phdi ligu iudn I n djnh ngn san pham gang hgp cdch, xi d l chay, ligu d l hodn nguygn; -f Do chuin bj tirng Id nguygn ligu (In djnh v l thdnh phin hda hpc vd cd hpt) vdi sd lu(;rng Idn du cho Id cao san xuit s20 ngdy ngn It phai dieu chinh cdc chd dg n|u luygn •f Ndng suit Id Pv tdng cao (tir 1,6 tln/m^ngdy dd tdng Idn 2,5 tin/m' ngdy) Tigu hao d c luygn kim giam dugc 15 kg cdcH'dn gang; + Tgn dgng nguin qugng cdm qud trinh khai thdc, qugng sdng trudc vd sau trung hod Idm nguygn ligu cho san xuat thigu kit Trong qud trinh triln khai thuc hign khdng ndn coi nh$ giai phdp ndo, bdi cdc gidi phdp dp dgng cd tinh thing nhdt ding bg vd h i trg cho nhau.Q TAi LI$U THAiU K H A O Nghigm Gia, Nguyln Vdn Thdng Bjnh hudng phdt triln hoat ddng khodng san ciia TCty Thdp Vigt Nam Tap chi Cdng nghigp Md sd Hd Ngi ndm 2000 Nghidm Gia vd nhdm tdc gia Giai phdp ndng cao higu qua quan \