Thdng tin khoa hpc cong nghp m d
NfJGHIEN CUIU DE XUAT CONG NGHE SANG TUYEN, CHE BIEN fle nang cao chat lining than cho mo than Nui Hong
Nui Hong coal mine belonging to Viet Bae Mining Ck).Ltd (WMl) has an annual coal output of 500.000 tons. The present coal screening and processing technology at the mine Is to separate the fine coal from other raw coal types for meeting the demands of the coal consumption. Due to the low quality and high humidity, the research and pmposat of the coal screening and processing technokigi' for increasing the coal quality at Nui Hong coal company has been considered as an important task
TtlS. NGUYEN H(JU NHAN TtiS. NGUYEN NGOC TAN KS. TRAN KIM TUYEN
Viin Khoa hoe Cdng nghi Md-Vinacomin Biin tip: ThS. Hoing Minh HOng
I . M d ' d l u
Md than Niii Hing thuge Cdng ty Cdng nghidp md Viit Bic - Vinacomin. Sdn lygng than nguydn khai hdng ndm dgt khoang 500.000 t i n . Cdc hd tiiu thy chinh ciia md Niii Hing Id Nhd mdy xl mdng Tdn Quang vd Qudn Trilu (than d m 4), Nhd mdy nhigt didn Cao Nggn (than cdm 4 pha trin vdl than cdm 6 md Khdnh Hda) vd mdt phin nhd eung d p eho cdc hd tidu thy ddn dyng trong vdng (than cdm 7).
Cdng nghd sdng tuyin, c h l biln than hign nay eda md than Nui Hing ehu y l u Id sdng tdch cdm (sii' dung sdng qua vdng vdl Id ludi 25x25mm) tir cde chiing logi than nguyen khai khde nhau d l ddp ij'ng yeu c l u tieu thy. Oo than nguydn khai mo than NOi Hing vdi d i e dilm Id ed d i I m rit cao (khoang tO' 20%-25%) nen hiiu suit sdng rit thip, do dd, d l thu h i i t i i da sdn phim, m i than Niii Hing dd phdi thyc hign ede giai phdp; (1) Sdng di sdng Igi nhilu Iln, (2) Phoi khd d l gidm dg I m trydc khi sdng. Ngodi ra, than chit lygng thip (dit dd l i n than) cua md Nui Hing eOng dygc khai thdc r i t hgn c h l do khdng cd than cdm t i t de pha trdn, than don xd phdt sinh trong qud trinh sdng than c i chit lygng thip khing t h i nghiln pha trdn md phai d i ding chd xii' ly. Cde v i n d l ndy dd Idm tang chi phi sdn xuit cua md, khii lygng than chit lygng thip t i n dgng khoang 710.000 t i n . Chinh vi viy, viic nghidn cO'U cing nghi sdng-tuyin ndng eao chit lygng than eho md than NOI Hing Id r i t d n thilt vd d p bdch.
2. N$i dung nghien c i i u 2.1- Kit qui nghlin cdu die tinh man
Qh ed t h i lap phyong dn cdng nghg sang- tuyln ndng cao chit lygng than eho md than NOi n i n g , d n phdi nghien cu'u dgc tinh cdc mau than.
1- Kit qua phan tich thanh phin dd hat don xd bi sing va dat da lan than
K i t qua phdn tieh thdnh phin dd hgt mdu than don xd bd sdng vd mdu d i t dd Iln than md Niii Hing dygc ting hgp trong bang 1.
Nhin xit:
- Ty Id cd hgt -25mm trong than don xd chiim khoang 26%, chirng td higu suit sdng dat dygc r i t thip do than ed do I m eao. Khi sdng mau dat dd Idn than, cdm thu dygc cd do tro trdn 50%.
do d i . d l tieu thy. d n phai tuyin ndng cao chit lygng.
- Than d p hgt (15 - 80)mm tu' nguin than don xd bd sdng vd d i t dd Idn than ed dd tro Bdng 1. Kit qui phin tich thinh phin dO hat miu than don xi bi sing vi miu dit di lin than md than NOI Hdng
TT
1 2 3 4 6 6 7
Cip
M
(mm) + 80 60-80 35-50 25-35 0-26 Cfng 15-80
Than don x6 bd sing Thu hoach %
18.19 16.96 18,70 19,81 26.34 100,00
69.66 Bitm Ak(%)
65.93 54.16 61.27 47.56 41.05 51,00 49.35
Dat ai Iln than Thu hoach %
32.97 13.90 7.43 6.29 39.41 32,97 37.57
Bitro Ak(%)
69.49 66,79 61.20 67.16 5315 69,49 61.04 KHCNM Sd 10/2015 • CN TlIVtN, CHE BIEN THAN -KHPANG SAN
Ky nlgm 43 ndm thdnh lap Vi$n Khoa hoc Cong nghe Mo - Vinacpmin
ttrong Crng Id 49,35% vd 61,04%, d l sii' dyng, d n phai tuyln d i ndng eao chit lygng.
2. Kit qui phin tich thinh phin chim noi K i t qua phdn tich chim n i l d p hgt (15 •
dg tro than biin sinh ra trong qud trinh n>a tdng
^
len hon 10%. Nguyen nhan Id cdc ldp dd kgp bj bd rdi. TCr eac k i t qua nghien eiiu tinh chit than tren, d i tdi, k i t lugn khing nen tuyin n>a than 80)mm tir than don xd bd sdng vd d i t dd l i n than Nui Hing trong mdi tnrdng trong lyc.
Ty le d p hgt (15 - 80)mm trong cdo m i u than qua thi nghigm sang trong mdi t r y i n g nydc da bj giam dang k l , chi cdn Igi tCr 50%-55%, ding thdi do tro d p hat ndy cung eao hon so vdi mau sang khd khoang 7%-8%. Bun d p hgt -0,5mm eung sinh ra rat Idn, len tdi khoang 40%
vol dg tro dao d i n g tir 40% -50%. Cd sy thay d i i ty Ig thu hoach vd dd tro eao d p hgt cua m i u khi sang nydc so vdi khi sdng khd Id do than, dd, biin set d i u bj vo vyn tir cac d p hat Idn xuing d p hat nhd khi mau than dygc rira trong m i i tnrdng nydc.
dygc tong hop trong bang 2.
Nhin xit:
Can eir tinh chit phan logi tinh kha tuyen eho thiy;
- Than don x i e l p hgt (15 - 80) mm cua than don x i bd sdng vd d i t dd I l n than cd tinh kha tuyen thugc logi rit khd tuyln. VI vgy, cdng nghg tuyen elnsii'dyngmdi tnrdng tuyln bing huyin phii ngng, tuy nhien, gid thdnh tuyln huyin phii Id rit eao d n phai xem xet y l u t i kinh t i .
- Dg tro dd thai sau tuyln cd t h i dgt Idn hon 71%, chO'ng td trong san phim dd cdn cd nhieu Idp dd kgp r i t khd thu h i i .
3. Kit qui thi nghi$m phin tich sing nudc Than Nui Hing thudc logi bdn antraxit r i t mIm vd dd bd rdi trong m i i trydng nydc. De nghien cO'U ddnh gid sy bd rdi than trong m i i tnrdng nydc, Vign Khoa hgc Cing nghd Md da tiln hdnh phdn tieh sdng nydc m i u than don xd bd sdng vd d i t dd I l n than. Ting hgp k i t qua so sdnh thdnh phin dd hgt m i u than khi sdng khd vd sdng nude dygc t i n g hgp trong bdng 3
Nhin xet:
Qua k i t qud thi nghigm dd eho thiy than Nui
Hing bd rdi Id r i t Idn len tdi hon 40%. Mdt khdc ^ „, . ,,. . ^ . sing than nguyin khai cim 4 Bing 2. Thinh phin tf trong dp hat 15-80 mm than don xd bi sing vi dit di lin than md NOI Hing
^^pl;-
' /• ""
, ' : ^ ^ = V ^ " l ! • \ • / : • ^ • • • -
Cum sang sd 4 md than Nui Hdng,
Cip ty tnfng (g/crrf)
<1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1
>2.1 Cdng BCin Cdng
Don xd t)d sing Thu hoach Xy
(%)
• 17,99 10,33 5,01 4,80 5,05 8,46 48,36 100,00 3,25
BitroAk(%) 20,03 26,47 30,87 34,86 39.60 46,76 71,17 49,93 30,92 49,31
THphaniy tr^ng lin cin
16,34 9,81 9,85 1 3 6 2
Oat di tan than Thu hoach Xy
(%>
4,01 7,60 7,23 6,60 6,36 8,01 60,29 100,00 4,84
BdtnoAk(%) 20,84 29,46 38,83 45,14 61,35 59,36 74,16 61,64 42,29 60,61
THphintf trgng lin cin
14,83 13,73 12,86 14,37
KHCNM S 6 10/2015 • CN TL'^ EN. CHE BIEN THAN -KHOANG SAN
Thong tin khoa hpc cpng nghe mo
Bing 3. Ting hap so sinh su thay dii thinh phin di hat, chit luang miu than don xi bS sing vi dit di lin than md than Nui Hing
TT
1 2 3 4 5 6 7 8
Cap hat (mm) 50-80 36-50 26-36 16-26 0,6-16 0-0,6 Cdng 16-80
Don xd losing Sang kho
TH(%) 36,84 31,88 16,24 16,04
100,00 100,00
06 (ro (%) 57,77 52,08 39,4 39,21
60,18 60,18,
Sang nudc TH (%)
19,90 16,52 7,64 6,23 10,00 40,71 100,00 49,29
Bd tro (%) 67,32 69,72 67,44 56,61 42,76 42,56 60,18 67,99
Bit di lan than Sing khd TH(%)
39,62 21,36 16,44 22,08
100,00 100,00
Bd (ro (%) 67,28 62,15 59,25 67,64
62,71 62,71
Sing nudc TH(%) 24,36 12,60 12,12 7,54 3,37 4001 100,00 66,62
eg (ro (%) 69,76 68,39 67,68 66,25 59,70 64,75 62,71 68,62 2.3- Bi xuit glii phip ky thuit edng nghi
ning cao hieu qua chi bien than tai md Ndi Hing
Qua kit qua nghidn ciru dgc tinh than don xd ba sdng, dit dd Iln than md Nui Hing cho thiy;
(1) Than CO dgc tinh khd tuyln Id r i t khd tuyln ndn d n phai sir dung phyong phdp tuyen bang huyin phu ndng. (2) Khi tuyln trgng lye trong mdi trydng nydc t^ Ig biin sinh ra rit Idn (chiim tdi khodng 40%). Do dd, d i i vdi than ciia md NOi Hing, vigc lya chon cing nghg tuyin trgng lye oOng nhy cing nghg tuyen n i i hogc cdng nghg tuyln khdc d n xem xet ky v i higu qua kinh t l . o i nang cao hidu qud hogt ding eua ede h i thing sdng eho md than Nui Hing, d l xuit ede giai phdp ky thugt edng nghg nhy sau;
- Thay mdi thilt bi sdng cd cde thdng s i kJ thudt phii hgp hon tgi md Nui Hing.
- Xdy dyng kho than ed mdi ehe nham tang kha nang phoi khd than bd sdng.
1- Tinh toin lira chon thiit bi sing mdi Ndng suit eua md Nui Hing hign nay khoang 500.000 tln/ndm vdi c h l d i Idm vigc 300 ngdy/ndm, 3 ea/ngdy, 8 gid/ca. Ndng suit tinh theo tIn/gid eua mo se Id:
QxK, 500.100x1,2
q= K^xNxnxm 0,65x300x3x8 ' 128,02 Tan/gicl (1) Thiit bj sdng d i u ty mdi tgi md Niii Hing phdi thdng qua ndng suit hdng ndm cua md, vi v|ly chgn ndng suit tinh eho thilt bj sdng d i u ty mdi
Cum sing s6 6 md than NOi Hdng, sing than nguyin khai cim 6 Id 130 tIn/gid. Khi dd, dign tieh lydi sdng dygc xdc djnh theo cdng thyc;
r = — T - r - r ^ •(•»') '^' q X 6 X k X1X ra X n X 0 X p Trong dd;
- Q; Nang s u i t sdng tinh theo tIn/gid, Q = 130tln/h;
- q; Ndng suit n i n g cua thilt bj vdi l i lydi sdng 25x25mm, q = 31m'/h
- 5; Trgng lygng the tieh vgt liiu. 6 = 1,15 tln/m=
- k; H i s i anh hydng eua vat lidu vyn, tra bang k = 0,7;
- 1 ; Hg s i anh hydng cua kich thyde hgt, tra bdng I = 1,03;
- m; H i s i anh hydng hiiu suit sdng khi a 60%, tra bang m = 1,65;
KHCNM s d 10/2015 • CN TllVEN, CHE BltN THAN -KHOANG SAN
K9 nipm 43 nam thdnh lap Vien Khoa hpc Cdng ngh$ Mo - Vinacomin
- n; Hg s i anh hydng hinh dang hat vd vgt ligu, tra bang n = 1,5;
- o; He s i anh hydng dd I m , sdng vdi v^t ligu vdn eye, tra bang o = 0,2;
- p; He s i dnh hydng phyong phdp sdng, tra bdngp = 1;
Thay cde gid trj vdo c i n g thire tren, ta tinh dygeF = 10,22m2.
Hiin nay tren t h i gidi dang dp dyng ring rdi cdc logi sdng phdn loai cd lydi sang cong hinh qua ehudi (Banana screen). Thilt bj sdng lydi eong hinh qua ehuoi so vdi ede thilt bj sdng thdng thydng cd nhu'ng yu d i l m sau; (1) Cd t h i sang than cd d i I m cao. (2) Cd ndng s u i t vd hiiu suit sdng cao hon sdng thdng thydng.
O i l vdi than md than NOi Hdng, d l x u i t thay t h i cdc thilt bj sdng hign nay bdng sang lydi cong hinh qua chuii logi 2ZXD1861 cd thdng s i ky thugt nhy sau; Dign tich lydi; 11m^, s i t i n g lydi; 2 ting, ndng suit; 150-200 tin/h, cing suit dgng eo; 30 kW.
2- Tinh toin xiy dung kho than cd mil che Hign nay, than ba sdng sau sdng than nguyen khai eiia md Nui Hing phai phoi ngodi trdi de gidm dg I m trydc khi dya sdng lai. B l ndng cao ndng suit, chu d i n g khing phy thudc vdo thdi tilt, d l xuit xay dyng mdt kho than cd mdi che n i m g i n cym sdng, than sau phoi khd dygc v$n chuyin d i n sdng nhim thu h i i t i i da lygng than cdm.
Dign tieh kho than dygc tinh todn dya tren cing thire;
6 X h Trong dd:
- Qbs: Lygng than bd sdng sinh ra trong 1 ngdy san xuit, Q K = 830 tIn/ngdy;
- 1 ; Thdi gian lyu kho, t = 6 ngdy - 6: Trgng lygng t h i tieh vdt lidu, 6 1,15tln/m'
- h; Chilu cao ddnh d i n g than trong kho, h = 4m;
Thay cdc gid tri vdo cdng thyc tren, ta tinh dygc 8 = 1082,61m='.
D l x u i t xdy dyng kho than cd mdi che cd dign tich S=1134m2 p ^ R = 42m x 27m).
Cum sing si 5 md than NOI Hdng.
sing dit di lin than 3. Kit lu$n
- Hign trgng edng nghi sang, c h l biln ciia mo than Nui Hing Id lgc hdu, do than cd dg I m cao, ndn d l thu hoi than cdm, d n phai sdng di sdng igi nhiiu i l n , phoi khd, do dd, phy thudc vdo thdi tilt, d i n g thdi ehi phi san xuit cao.
Than don xd vdi chit lygng t h i p khdng t h i nghlin d i tiiu thy tn,re t i l p do do phai d i ddng chd xu' I;?. VI vgy, viic d i x u i t gidi phdp cing nghi sdng-tuyin nhim ndng eao chit lygng than eho mo Nui Hdng Id eIn thiit.
- K i t qua nghien ciru tinh chit than md Ndi Hing eho thiy, than thudc logi r i t khd tuyln, ty Ig sinh biin Idn ndn khdng kha thi v l higu qua kinh t l khi sir dyng phyong phdp tuyln trgng lye hodc tuyln n i i .
- ok xuit dp dyng thilt bj sdng lydi hinh qua chuil (S=11m2; P=30kW) thay t h i cho d c thilt bj sdng hign nay, xdy dyng kho d i phoi than don x i tgi md Nui Hing n h i m ndng eao higu qua hogt ddng d c cym sdng. chO d i n g trong san xuit. ning cao hiiu qua san xuit kinh doanh cho md than Ndi Hing./.
rdi li^u tham khio:
1) Viin Khoa hgc Cdng nghg Md - Vinacomin, (2014 -2015), Nghlin cCru di xuit cdng nghi sing tuyin than hap If cho mdt s6 md nhd ngoii vung Quing Ninh.
2) Vign Khoa hoc Cdng nghg Md - Vinacomin, (2014), "Nghlin cihi cdng nghi sing-tuyin tin thu than ti/ngudn than cue don, cucxd, bi sing va dit di lin than nhim thu hdi tdi da til nguyin am hid than Khanh Hda, NOI Hdn^.
KHCNM S 6 10/2015 * CN TUVtN, CHt BltH THAN -KHOANG SAN
