Thong tin khoa hoc cong nghe mo KET QUA NGHIEN CUU XAC DINH NGUYEN NHAN SU SUY GIAM CHAT LUUNG THAN KHU MO KHE CHUOI TRONG QUA TRINH CHE BIEN, LUU KHO VA DE XUAT cac giai pliap Idiac pliuc nli^m nang[.]
Thong tin khoa hoc cong nghe m o KET QUA NGHIEN CUU XAC DINH NGUYEN NHAN SU SUY GIAM CHAT LUUNG THAN KHU M O KHE CHUOI TRONG QUA TRINH CHE BIEN, LUU KHO VA DE XUAT cac giai pliap Idiac pliuc nli^m nang cao liieu qua san xuat ThS NGUYEN HUU NHAN ThS MAI VAN TH|NH KS TRAN KIM TUYtN Vign Khoa hgc Cdng nghg Md - Vinacomin \- Md diu Md than him Id Khe Chuli thupe dja phin xa Tring Luang, huypn Ddng Trilu, tfnh Quang Ninh, Cdng ty TNHH MTV 91 - Tong Cdng ty Ddng Ble quan ly v i khai thic, vdi sin lupng than nguyen khai dat 330 nghin t i n nam 2011 v i du kiln se dat 450.000 tan nam 2012 Khu md Khe Chuoi cd die dilm dja chat rat phipc tgp, cau true vfa than khdng on djnh, cd nhieu Idp d i kep, nhilu khoing vat qugng pint x i m t i n than, than nguyen khai thudc logi than xau, dp tro trung blnh tip 4548% Trudc nam 2011, than chit lupng xau, edng nghe sang tuyln chf cd sing khd, nhat tay thu cdng v i nghiln don xd ba sing pha trdn nen chat lupng san pham khdng dat yeu cau tieu thg, phai dk ton kho l i u ngiy tren ding bai v i bj phong hda, bd rdi, vd vgn theo thdi gian, d i n d i n pham d p chat lupng than ngiy cing suy giam, lim anh hudng d i n hieu qua s i n xult eua Cdng ty TNHH MTV 91 ndi rieng v i Ting Cdng ty Ddng Bae ndi chung Dk giai quylt van d l tren, vide nghien cuu dinh g i i su suy giam chit lupng than khu Weathering of coal is the tendency of coal to break apart when they exposure to the weather and is known to have many negative effects on coal One of the severe-effects of weathering on Khe Chuoi ROM coal is that, the shale and middlings disintegrate (degradation in size) or slack very readily when exposure to the weather, particularly when alternatively wetted and dried or subjected to hot sunshine Slacking of shale and middlings causes increasing ash content and yield of fine coal, thus decreasing the value of the fine coal This report introduces the effects of weathering on decreasing the value of the coal and also propose the methods that could be employed in practice to reduce the negative effects of coal-weathering on the processing and storage of coal md Khe Chuoi q u i trinh c h l biln, luu kho v i d l xult c i c giai phip khac phuc la hit SLPC c l n thilt II- Nghien cuu dinh gia su suy giam phlm cip chit lup'ng than md Khe Chudi Trong viec nghien cuu dinh gii su suy giam pham elp chit lupng than md Khe Chuli, nhdm thue hipn da tiln hinh khao sit thuc t l tinh trgng than nguyen khai sau khai thic cung nhu tren bai chua, dong thdi lay mau phin tich, dinh gii chit lupng than sau khai thic cung nhu qui trinh luu kho 1- Khdo sdt tinh tr^ng than sau khai thdc vd qud trinh Iwu kho Kit qua khao sat thuc t l cho thay, than nguyen khai md Khe Chuli thupe logi mim, bd, lin nhieu d i xft kep de bj phong hda, bd rdi, vd vgn Doi vdi than tren ding bai ngoai trdi, phan da xit, bia kep +15mm than bj bd rdi, vd vun cim d i vdi mLFC dp rlt Idn 2- Liy mdu, phan tich ddnh gid chit Iwong than sau khai thdc Mau than nguyen khai dieoc lay tip vfa v i vfa la cic vfa dang khai thic, vj tri lly mau d dlu bing tai, tai cua Id v i dippc sing phan logi cd hgt, dong thdi phin tich xic dinh dp tro Kit qua phin tfch miu du^ac trinh biy bang Nh$n xet: Theo kit qua phan tfch mau than bang cho thly: , - Than c i m khd (0 15) mm chilm ty le 47 -50% than nguyen khai, thude chung logi than cim cd chat lupng thlp tLP cim din cim KHCNM SO 4/2012* CNKT HAM LO w Thong tin khoa hQC cong nghd mo Bing Kit qui phin tich sing miu than nguyin khai via vi via sau khai thic Vie\5 Via dp hgt (mm) TH% +200 160 80-200 19,98 67,01 21,62 61,01 50-80 9,86 54,65 9,52 59,33 35-50 7.40 7,08 57,70 15-35 11,47 52,95 50,69 11,91 55,32 0-15 49,68 38,60 46,68 52,45 COng 100,00 48,97 100,00 56,37 TT fl^(%) TH% A^(%) 79,90 " 3,19 1A~Z4 Miu than don x6 -t-lSnun, than cue -t-lSnun, trung gian -t-lSnun, da xit -f-lSnun (hole miu than nguven khai I ,^ Sing (jf 15 m m ,, M l u than don xd +15mm, than cgc +15mm, trung gian +15mm v i 6d xit +15mm eua than nguydn khai sau sing khd tieh c i m - M l u than nguyin khai C i e m l u than dupe thf nghidm theo sa d l hinh a Xdc djnh khdi Iwang vd dC tro than cdm sinh tw don x6 +15 mm cue via vd via di kho c6 mdi che va khdng c6 mdi che K i t qua x i c djnh khii lupng v i dd tro than cim 0-15mm, kho ed mii che v i khdng ed m i i che dupc trinh b i y bang v i Nh$n xdt: Theo kit qua phin tfch mau bang va cho thly: Sau 45 ngivMuc dp phong hda, vd vgn cua d i +15mm, trung gian 15 ^^^^^^ ^15 +15mm, than cgc +15mm, than don xd +15mm de Sau 60 ngiv tren bai chCpa ngoii trdi khdng ed m i i che d l u Idn han rlt , Sing 15 m m ^ nhilu so vdi dk kho ed m i i che, dd d i xit +15mm ed miPc dp phong Cin hda, va vgn Idn nhlt, sau dd l i trung gian bia kpp +15mm +15 mm v i culi cung la than cgc +15mm O Miu phin tfch tro A^ Da xit, trung gian, bia kep Hinh Sa thi nghigm gia cdng phan tich xac dinh khoi Iwgnge l p hgt +15mm bj vd vgn thinh c i m 6a l i n v i o than, da vi dp tro than cim sinh tir don xd +15mm vi tir miu than nguyin khai l i m ting ty Ip thu hogeh than cam than nguyen khai d p hgt (15-80)mm chilm khao s i t thuc t l v i phin tfch nhung ddng thdi cung lam tf Ip khoang 29%, dp tro tip m l u than sau khai ting dp tro chung v i giam 53-57% chit lupng tuang thic, d l nghien CLPU x i e djnh chit lup^ng than cim duang c i m 7b d i n 7C su suy giam phlm e l p chit - Thdi gian luu kho cang lup'ng than q u i trinh e h i - Nghien CLPU xdc dinh dai thi mCpc dp vd vgn thinh nguyen nhdn sy suy gidm biln v i luu kho, nhdm thuc c i m cing Idn, ty Ip cim da phim cip chit Iwgng than hipn da lly m l u than luu sinh cing nhilu, dp tro than qud trinh chi bien vd kho ed mai che v i khdng cd c i m cing tang, l i m tang muc Iwu kho m i i che, vdi c i c logi m l u than dp suy giam phlm d p than Tren ca sd c i c k i t qua sau: - Trong vdng 15 ngiy dlu z—I KHCNM s d 4/2012* CNKT HAM LO Thong tin khoa hoc cong nghe md Bang Kit qui xic djnh khoi Iwgmg vi dp tro than cim 0-15 mm sinh tir don xd +15mm cu via va via di kho c6 mil che Cim 0-15 mm sinh tir Cim 0-15 mm sinh tir don xd +15 mm via don xd+15 mm via Tir Tir TCr Tir Tir Tipdi Tirdi trung gian than cyc donxd gian trung than cyc donxd +15 mm +15 mm +15 mm +15 mm +15 mm +15 mm +15 mm +15 mm Thai TH gian TH TH THso TH TH so TH (ngiy) so THso so don so so don sodi di A' TG+15 A' cyc A' A' A' xd A' TG A' than A' xd +15 +15 (%) mm (%) +15 (%) +15 +15 (%) (%) (%) +15 (%) (%) +15 mm mm mm mm (%) mm mm mm (%) (%) 0 (%) 0 (%) (%) (%) 0 (%) - 15 1.21 83,13 0,44 57,02 0,30 21.36 0,65 67,98 3.72 75,41 0,95 56,98 0,39 22.50 1,90 69,46 30 1,93 80,63 1.23 56,40 0.95 22,01 1,38 60.35 6.19 75,72 1,73 53,61 1,44 23.25 3,45 65,82 45 2,65 79,44 1,81 54,47 1,64 21.74 2,04 57.07 7,41 76,40 2,29 52,25 1,97 23.57 4,27 65,22 60 3,20 79,02 2,43 55,15 2.34 21,39 2,65 55.46 8,95 76,60 3,00 53,05 2,54 24.69 5,27 65.08 Bing Kit qui xic djnh khoi Iwgmg vi dp tro than cim 0-15 mm sinh tir don xd +15mm cU via vi via di ngoii trdi khdng cd mil che Cim 0-15 mm sinh tip Cim 0-15 mm sinh tCP don xd+15 mm via don xd+15 mm via TCP TCP TCP TCP TCr TCP Tipdi TCpdi trung gian than cyc donxd trung gian than cyc donxd *15mm +15 mm +15 mm *15 mm +15 mm +15 mm +15 mm *15 mm Thdi TH gian TH THso TH TH TH so TH (ngiy) so don so so so THso don sodi A' A' xd A' TG A' than A' A' TG+15 A' cyc A' di xd +15 (%) +15 (%) +15 (%) +15 (%) +15 (%) mm (%) +15 (%) +15 (%) mm mm mm mm mm mm (%) mm (%) (%) (%) (%) (%) (%) (%) 0 - 0 0 0 1,78 57,02 1.14 21,36 2,21 68,96 3,77 78.41 1,65 63,98 0,96 23,50 2,46 70,71 15 3,08 83,13 30 12,37 84,93 6,66 71,09 2.30 27,78 8,17 77,58 12,76 80,49 4,36 71,43 3,81 30,11 7,99 73,94 45 29,41 79,82 13,69 71,72 3.38 27,97 18,27 75,63 24.48 81,76 6,47 71,74 4,89 30,58 14.17 76,61 60 44,13 81,38 19,27 71.86 4,94 28,39 27,00 76,95 32,90 81,92 8,48 71,46 6,35 30,39 18,93 76,81 sau khai thic, mCpc dp phong hda, vd vgn elp hgt +i5mm khdng ding k l , nhung sau 15 ngiy t i c dp tang rat nhanh, khoi lupng c i m d i sinh rat Idn b Xdc dinh si/ thay doi ty le thu hoach va dp tro than cdm than nguyen khai kho c6 mdi che vd khdng co mdi che Kit q u i xie djnh su thay doi ty Ip thu hogeh v i dp tro than cim 0-15 mm than nguyen d l than nguyen khai vfa v i vfa md Khe Chuli kho ed mii che v i khdng ed m i i che dupc trinh b i y bang Nh$n xet: Kit qua trinh biy bang eho thly: - Khi dk than nguyen khai vfa 4, vfa md Khe Chuoi phong hda ngoii trdi hoge kho cd mai che, ty Ip thu hogeh v i dp tro than cim than nguyen khai d l u tang KHCNM s d 4/2012* CNKT HAM L jl Thong tin khoa hQC cong nghg md w Bing Kit qud xic dinh sy thay dii ty ip thu ho^ch vd dp tro than cdm than nguydn kh di kho cd mil che vi khdng cd mdl che Than nguyin khai via Di ngoii trdi Di kho khdng cd mil che cd mil che Thirl gian (ngiy) Tyip rr/o) 49,68 50,01 50,37 50,70 51,02 15 30 45 60 Tyip rr/o) 49,68 50,79 53.79 58,87 63,27 Ddtro AT/o) 38.60 38.79 38,90 38.97 39,04 T i e dp phong hda, vd vgn, t i c dd gia ting dd tro v i gia ting ty Ip thu hogeh than c i m than nguydn khai d l phong hda ngoii trdi Idn han rlt nhilu so vdi trudng hpp dk kho cd m i i che - Thdi gian d l than luu kho phong hda cing d i i thi miPC tang ty Ip thu hogeh v i muc ting dp tro cua than c i m than nguyen khai cing eao, phlm cap than cing bj suy giam, dge bipt l i d l tren bai chipa ngoii trdi khdng ed m i i che Than vfa ed mCpc dp phong hda vd vgn, muc ting ty Ip thu hogeh v i ting dd tro than c i m Idn han so vdi than Than nguydn khai via Di kho Di ngoii trdi cd mil che khdng mil che Ddtro AT/o) T9ip rr/o) Ddtro AT/o) 38,60 39,26 41,58 44.38 46,84 46.68 47,70 48,52 48,96 49,49 52,45 52.81 52.96 53,04 53.17 vfa d l trdn b i i ehua ngoii trdi - Nguydn nhin ehu y l u l i m ting ty Id thu hogeh v i l i m ting dd tro than c i m than nguydn khai l i phong hda vd vgn cua d i xft, thinh c i m d i Idn han rlt nhilu so vdi than cgc c l n t l chuc sing tuyln c h l biln than vdng 15 ngiy sau khai thic c So sdnh muc chenh Ipch ty Ip thu ho^ch vd dp tro than cdm than nguyin khai so v&i ban dau de than kho c6 mdi che vd khdng c6 mdi che Kit qua so sinh muc chdnh Idch dd tro v i ty l | thu T9IP rr/o) 46.68 47,99 50,94 54,24 56,77 Ddtro AT/o) 52,45 52,95 54,25 55,81 56,78 hogeh than c i m than nauydn khai so vdi ban dlu de kho ed mii che va khdng cd m i i che dippe trinh b i y bing D l thj so sinh dup'c trinh biy hinh Nhpn xdt: K i t qua bang v i hinh cho thly: Khi dk than tren kho bai ngoai trdi khdng cd mii che, miPC dp phong hda vd vgn cic e l p hgt Idn thinh cim d i , t i n g r l t nhanh v i Idn han rlt nhilu so vdi d l kho cd m i i che - Thdi gian luu kho cing Idn thi dd tro than cim cing t i n g cao, d i e bidt d l tren Bing So sinh mCrc chdnh ipch dp tro vi ty ip thu hogeh than cdm than nguydn khai vdi ban diu di than kho cd mil che vi khdng cd mil che Via Thdi gian (ngiy) 15 30 45 60 Than di kho cd mii che Chdnh Igchtyip thu hoi Dgr/o) 0,33 0,69 1,02 1.34 Via Than di ngoii trdi khdng mii che Chdnh Chdnh Ipch dp Ipchtyip tro DA" thu hoi r/o) Dgr/o) 0,19 0,30 0,37 0,44 1.11 4,11 9,19 13,59 KHCNM S6 4/2012* CNKT HAM LO Than di kho cd mil che Chinh Chdnh ipch dd Ipchtyip tro DA^ thu hii r/o) Dgr/o) 0,66 2,98 5,78 8,24 1.01 1,84 2,28 2,81 Than di ngoii trdi khdng mil che Chinh Chdnh Ipch dp Ipchtyip tro DA' thu hoi Dgr/o) r/o) 0,36 0,51 0,59 0,72 1,31 4,26 7.56 10,09 Chdnh lgch tro DA r/o) 0,50 1,80 3,36 4,33 Thong tin khoa hoc cong nghe mo bai chLPa ngoii trdi khdng cd m i i che Pham elp than cd t h i bj giam tip c i m thuang pham sang c i m phg phlm 14 ill - Dk x u i t cac giai phap giam thieu SIP suy giam p h l m c i p c h i t lu'p'ng than 11 kit qua nghien CLPU tren diy, nhdm nghien CLPU d l xult cic giai phip giam thilu su suy giam pham d p chat lupng than v i ning cao hipu qua s i n xult c h l biln than tgi md Khe Chuli nhu sau: Ap dgng hp thing sing tuyln, c h l biln than bang edng nghp tuyln huyIn phu tu sinh nhlm: TLP - Ning cao ning luc sing tuyln, c h l biln, ning cao pham d p chit luang than - Giai quylt ton dpng than, t i n thu t i i nguyen v i giam thilu d nhidm mdi trudng X i y dung kho ehua than ed m i i che - Doi vdi than cgc, ed g i i trj thuang phlm cao v i dd bj bge miu, giam dp i n h , dd vd vgn d l ngoii trdi nen c l n chLPa kho ed m i i che; D l i vdi c i e chung logi than edn Igi nen che chan bang cich phu bat kfn luu kho Dilu ehfnh k l hogeh s i n xult khdng dk ton dpng than - Dam bao thdi gian than luu kho khdng q u i 15 ngiy sau khai thic - Ting cudng logi bd 6a l i n than tren cua Id III K i t luan Than nguyen khai vfa v i vfa md Khe Chuoi ed chit lupng thlp, dp tro tmng blnh tip 45% - 48%, him lupng luu • ( 13 13 / 12 12 / 10 10 / 1' w' • ' ' r / '•'" M '< /^\ r j) _^-\ [lir' % E "8 - Oitah ^ ^ U TH than cim TNK V4 Ai kho lo ban diu (%) -Oitoh I6ch t^ If TH than cim TNK V4d< ngoii (rdi lo ban diu (%) - ChCnh ^ dd tro than cim TNK V4d^ kho lo ban diu (%) / S ' yr / -Chtoh l^Ot t^ le IH than cim TNK V5