Hoi nghi khoa hoc ki thuat md qudc ti 2010 Cong nghiep md tien tiin vi su phat triin bin viing NGHIEN CUTJ TUYEN THAN CAP HAT MIN DO TRO CAO MO T H A N H A T U B A N G T H I E T B I T U Y E N T A N G[.]
Hoi Cong nghi nghiep khoa hoc md tien ki thuat tiin md qudc vi su phat triin ti bin 2010 viing NGHIEN CUTJ TUYEN THAN CAP HAT MIN DO TRO CAO MO T H A N H A T U B A N G THIET B I T U Y E N T A N G SOI ThS Pham Van Luan; TS Nguyen Hoang Son; TS Pham Huu Giang T r u o n g D a i hoc M o - D i a chat Tdm tat: Bao cao trinh bay kit qua thic nghiem tuyin than hat chat luong thap md Ha tu tren thiet bi tuyin tdng sdi Trong qua trinh thi nghiem da tiin hanh khdo sat anh hudng cua mot loai thdng sd (tdc dd cap lieu, luu luong nude tqo tdng sdi, cdc thdng sd kich thuoc thiit bj) den kit qua tuyin Kit qua thi nghiem cho thay tic than hat md Ha Tu dd tro 43% cd the thu duoc than sach cd tro 21-28% vdi thu hoach 52-62% vd dd thai cd dq tro >75% Tren the gioi hien co rat nhieu loai thiet bi tuyen lam viec theo nguyen ly tang soi, n h u n g thiet b i t u y e n co h i e u qua v a d u o c sir d u n g b i e n h o n ca l a R e f l u x classifier f \ r \ -\ ( R C ) T h i e t b i bao g o m m o t bo cac tarn n g h i e n g dat t r e n l o p tang soi L o p tang soi duoc tao a phan thang d u n g cua thiet b i d u o i cac t a m n g h i e n g p h i a tren T r a n g thai tang soi t r o n g t h i e t b i R C d u o c tao b o i viec cap d o n g n u o c n g u o c v o i toe nhat d i n h d u o i day cua thiet b i T h i e t b i d u n g de p h a n chia h o n h o p cac hat k h o a n g , dua tren co s r \ r so cua su khac n h a u ve c o hat hoac t y t r o n g C a u tao R C bao g o m tap h o p cac t a m nghieng dat song song d i e u rat can thiet de tang nang suat r i e n g v a h i e u qua t u y e n cho thiet b i N a n g suat cua thiet b i co the dat d u o c cao h o n n h i e u l a n so v o i he t h o n g t h o n g t h u o n g Theo cac ket qua n g h i e n c u u tren the g i o i , h i e u qua t u y e n t h a n cap hat m i n cua thiet b i R C p h u thuoc c h u y e u vao cac y e u t o : toe d o n g n u o c tao tang s o i ; goc n g h i e n g cua kenh ( q ) ; t y so g i u a c h i e u dai v a khoang each cua cac t a m n g h i e n g ( L / z ) Bao cao neu cac ket qua n g h i e n c u u k h i t u y e n than cap hat - m m co t r o t r e n % cua m o than H a T u tren thiet b i t u y e n tang soi a m o t so che c o n g nghe T i r d u a che c o n g nghe h o p ly de tuyen d o i t u o n g than M a u va t h i e t b i t h i n g h i e m M a u than H a T u cap hat - m m co t r o tren % d u o c d u n g l a m m a u t h i n g h i e m , t i n h chat cua m a u n g h i e n c u u duoc neu a B a n g Bang Tinh chat cua mau nghiin Cap ty Cap hat 0,2 - mm ciru Cap hat - m m Cap hat 0,2 - mm g,% A,% g,% A,% g,% A,% -1,4 7,35 4,2 2,62 4,55 9,97 4,29 1,4-1,5 19,43 4,95 14,02 5,12 33,45 5,02 1,5-1,6 4,57 7,72 0,98 7,49 5,54 7,68 1,6-1,7 3,21 38,13 0,83 38,13 4,04 38,13 1,7-1,8 2,07 62,68 1,85 63,56 3,92 63,10 1,8-1,9 3,61 80,02 1,59 81,32 5,20 80,42 + 1,9 21,54 86,85 16,33 87,62 37,87 87,18 Cong 61,78 41,67 38,22 47,12 100,00 43,75 742 Hdi _ _ Cdng nghi khoa nghiep hoc md tien ki thuat tiin md qudc vi su phat ti - trien 2010 ben viing Thilt bi RC thi nghiem co tilt dien la 150mmxl50mm, voi tim nghieng phia hen co the thay d l i d u o c goc nghieng v a t y s i L / z So cau tao cua m a y t h i h i e n 6* H i n h D i e u k i e n t h i n g h i e m v a each x u l y so l i e u r s x / > Cac t h o n g so t h i n g h i e m d i e u k i e n bao g o m : toe d o n g n u o c tao tang soi; goc nghieng cua k e n h ( q ) ; t y s i g i u a chieu dai v a k h o a n g each cua cac t i m nghieng ( L / z ) C o hat dua t h i n g h i e m - m m Sau k h i t h i n g h i e m d i e u k i e n , da t i m d u o c c h i cong nghe tuyen t o i u u T i r t i l n hanh t h i n g h i e m t u y e n l i e n tuc c h i t l i u u cua t h i l t b i D i e u k i e n t h i nghiem: K h o i l u o n g m o t m a u t h i n g h i e m la k g ; t h o i gian c i p lieu 20s; thdi gian chay t h e m sau c i p lieu khoang phut T h i n g h i e m lay san p h a m than sach, da thai v a h u n g gian Cac san p h a m dua d i say k h o can de xac d i n h khoi luong Cac san p h a m duoc lay m a n phan t i c h h o , phan tich c h i m n o i v a dua d i phan t i c h ray qua ray m m Tam nghieng Than D e tien h a n h t h i n g h i e m t u y e n l i e n tuc da sir dung toe cap l i e u 0,5kg/s, c u sau 40s lay m o t m a u than sach v a da thai Cac san p h a m d u o c dua d i say kho, can xac d i n h k h o i l u o n g v a p h a n t i c h t r o Tam phan ph6"i nutfc K e t q u a t h i n g h i e m Toe dp dong nude, mm/s 80 88,9 97,8 106,7 Da thai Hinh xac dinh toe dp cap ddng Ten san pham Thu hoach, % D d tro, % Than sach Trung gian Da thai Cong Than sach Trung gian Da thai Cong Than sach Trung gian Da thai Cong Than sach 52,66 19,89 27,45 100 54,39 19,22 26,39 100 57,93 17,29 24,78 100 59,52 23,41 49,35 76,59 43,17 23,64 49,98 78,25 43,11 24,09 50,7 82,6 43,19 25,75 T r u n g gian 17,86 49,78 Da thai 22,62 83,66 100 43,14 Cong 743 / / / / / 6ng ca'p nutfe tao ting s6i—i T h i n g h i e m xac d j n h toe d o n g n u d e tao jX At i ^ t t a n g soi t o i u u K e t qua t h i n g h i e m xac d i n h toe d o n g n u o c tao tang soi v o i goc n g h i e n g cua k e n h q = ° v a L / z = 24 duoc cho 6* B a n g Bang Kit qua thi nghiem nu&c nguyc Cap li£u So nguyen cua may RC ly Thuc thu phan chay vao than sach, % 70,97 73,01 77,41 77,72 Hoi Cong nghi khoa nghiep hoc md tien kT thuat tiin md quoc vi su phat ti triin bin 2010 vung N h a n xet T i r cac ket qua t h i n g h i e m d tren co m o t s6 nhan xet sau: • K h i tang t i c d o n g n u o c tao tang soi t i r 80mm/s d i n 106,7mm/s, t r o , t h u hoach v a t h u c t h u p h a n chay t r o n g t h a n sach tang d i n T h u h o a c h cua da t h a i g i a m dan v a tro da t h a i tang dan; • Theo ket qua phan t i c h ray (san p h a m than sach qua ray m m ) , n h a n thay k h i t6c dong n u a c tao tong soi tang, t h u hoach v a h o cua cap hat - m m t r o n g san p h a m than sach tang nhanh; • N h u v a y , k h i tang toe d o n g n u o c tao t i n g soi da l a m cho cac hat n h o co t y I o n d i vao san p h a m t h a n sach l a m g i a m chat l u o n g cua t h a n sach H a y n o i m § t each khac, su p h a n chia cua cac hat t r o n g m a y t u y l n da c h u y e n dan t i r theo t y t r o n g cua hat sang k i c h t h u o c hat 3.2 T h i n g h i e m x a c d i n h goc n g h i e n g c u a k e n h K e t qua t h i n g h i e m thay d o i goc n g h i e n g ciia k e n h k h i co d i n h toe d o n g nuoc tao tang soi 97,8mm/s v a t y so L / z l a 24 d u o c cho d B a n g Bang Kit qua thi nghiem Gdc nghieng, 60 65 70 Ten san pham Than sach Trung gian Da thai Cong Than sach Trung gian Da thai Cong Than sach Trung gian Da thai Cong xac d\nh gdc nghieng Thu hoach, % 53,29 19,76 26,95 100 55,15 19,4 25,45 100 57,93 17,29 24,78 100 ciia kenh Dp tro, % 22,48 49,94 79,21 43,19 23,43 50,39 80,26 43,12 24,09 50,7 82,6 43,19 Thuc thu phan chay vao than sach, % 72,72 74,25 77,41 N h a n xet Khi tang goc nghieng cua kenh tir 60° din 70°, co mot so nhan xet sau: • T h u hoach, t r o v a thuc t h u cua t h a n sach tang d i n D i n g t h a i t h u hoach cua da thai g i a m dan v a t r o cua da thai tang d i n ; * r f r • K e t qua p h a n t i c h ray cho thay v a i goc n g h i e n g thap, t h u h o a c h ciia cap hat I o n h o n g san p h i m t h a n sach c h i l m m o t t y 1? n h d v d i t r o t h i p ; - N h u v a y , d gdc n g h i e n g t h i p cac hat l d n c d t y t r o n g n h d de p h a n b l n h i m vao san pham da thai v a l a m g i a m h i f u qua t u y e n cua may K h i m a y l a m v i e c c h u y e u theo che phan cap B d i v i , gdc n g h i e n g t h i p t h a i g i a n r o i cua cac hat theo p h u o n g phap t u y l n 744 Hdi Cong nghi khoa nghiep hoc md tien kT thuat tiin md quoc vi su phat ti - trien 2010 ben vung voi cac tam nghieng se giam lam cho luong hat lang dong xuong cac tarn nghieng tang len Cac hat sau k h i l i n g d o n g x u d n g cac t i m nghieng se c h u y l n d o n g t r u o t tren b l mat cac t i m nghieng x u l n g p h i a d u o i d i vao l o p tang soi 3.3 K e t q u a t h i n g h i e m xac d i n h t y so L / z D l t i l n hanh t h i n g h i e m xac d i n h h i e u qua t u y e n ciia m a y vao t y so L / z , chiing t o i da lam hai loat t h i n g h i e m : loat t h i n g h i e m t h i i nhat e l d i n h z = , m m ; loat t h i n g h i e m t h i i hai c l d i n h L = 0 m m Cac t h i n g h i e m deu co toe d o n g n u o c tao t i n g soi va goc nghieng ciia k e n h q l i n l u o t l a 97,8mm/s v a ° K e t qua t h i n g h i e m d u o c cho d B a n g Bang Kit qua thi nghiem Co dinh z = xac dinh ty so L/z Cd dinh 37,5mm L = 900mm Thuc Ty A SO L/z T e n san pham Thu hoach, % Do tro, % thu than sach, Thuc Ty A SO L/z T e n san pham Thu hoach, % Do tro, % % thu than sach, % Than T h a n sach 60,39 26,42 sach 48,46 21,2 gian 20,03 49,16 31,51 73,1 100 43,15 51,19 22,53 gian 19,24 50,06 D a thai 29,57 74,25 100 43,12 57,93 24,09 gian 17,29 50,7 24,78 82,6 100 43,19 Trung 16 Trung gian 18,01 49,39 D a thai 21,6 84,67 D a thai Cong 100 43,14 Cong 78,15 12 67,18 Than T h a n sach 57,93 sach 24,09 Trung 24 T r u n g gian 17,29 50,7 D a thai 24,78 82,6 100 43,19 53,91 22,74 Cong 77,41 18 Cong 69,72 Than T h a n sach sach Trung 32 T r u n g gian 18,67 50,44 D a thai 27,42 78,28 Da thai 100 43,14 Cong Cong 73,25 24 N h a n xet T i r cac k i t qua t h i n g h i e m h e n co m o t s i nhan xet sau: 745 77,41 Hdi Cong nghi nghiep khoa hoc ki thuat md tien tien md quoc vi su phat te - trien ben 2010 viing • Khi chieu dai (L) cua kenh nghieng tang va khoang each (z) giua cac tam nghieng c l d i n h , t h u hoach; tro v a t h u c t h u p h i n chay cua t h a n sach g i a m d i n D o n g t h o i t h u hoach ciia da t h a i tang d i n c o n tro ciia da g i a m d i n K h i L tang, t h o i g i a n d i c h c h u y l n cua cac hat k h o a n g theo p h u o n g tiep t u y e n v o i cac t i m n g h i e n g tang l a m cho so l u o n g hat lang d o n g x u o n g be m a t t a m n g h i e n g r o i chuyen d o n g t r u o t x u o n g tang l e n ; • K h i L co d i n h c o n z tang dan t h i t h u hoach, t r o v a t h u c t h u ciia san p h a m than sach g i a m d i n D i n g t h o i t h u hoach ciia da t h a i tang d i n v a t r o g i a m dan K h i khoang each g i u a cac t a m nghieng tang, che d o n g chay g i u a k e n h n g h i e n g l a che chay t i n g D o t i e r o i ciia cac hat theo p h u o n g phap t u y e n v o i cac t a m n g h i e n g tang £ 3.4 K e t q u a t h i n g h i e m t u y e n l i e n t u c Sau cac t h i n g h i e m t u y e n gian doan da xac d i n h d u o c che c o n g nghe t u y e n tot n h i t cho loai than dang n g h i e n c u u la: toe d o n g n u o c n g u o c = , m m / s ; goc nghieng cua k e n h q = ° ; v a t y so L / z = 24 A p d u n g cac che c o n g nghe t u y e n cho t h i nghiem tuyen l i e n tuc, ket qua t h i n g h i e m cho B a n g Bang Ket qua thi nghiem Ten san T h u hoach, pham % tuyen lien tuc T h u hoach, Do tro, % T e n san p h a m % D o tro, % Than sach 1,42 20,04 D a thai 1,26 86,58 Than sach 4,26 20,27 D a thai 1,95 85,66 Than sach 4,84 22,65 D a thai 2,37 86,49 Than sach 7,89 25,35 D a thai 2,63 85,72 Than sach 7,63 26,25 D a thai 2,53 85,5 Than sach 7,79 26,57 D a thai 2,63 85,25 Than sach 7,21 26,32 D a thai 2,74 87,84 T h a n sach 7,05 27,6 D a thai 2,89 83,11 Than sach 7,47 26,69 D a thai 2,74 86,01 Than sach 10 7,37 25,04 D a thai 10 2,74 87,15 Than sach 11 7,11 25,7 D a thai 11 2,53 85,12 T r u n g gian 2,95 68,14 T o n g cong 100 43,01 N h a n xet T i r ket qua t h i n g h i e m t r e n co m o t so nhan xet sau: • T h o i g i a n dau ciia t h i n g h i e m l u o n g cap l i e u vao m a y c o n t h i e u , h a m l u o n g pha ran t r o n g m a y t u y e n t h i p dan d i n t h u hoach v a t r o ciia than sach t h i p ; • K h i l u o n g cap l i e u vao m a y d u I o n d o n g t h o i l o p tang soi v a l o p h u y e n p h u g i u a cac kenh nghieng o n d i n h t h i t h u hoach v a tro ciia san p h a m than sach hau n h u k h o n g thay d o i ; 746 Hdi Cong nghi nghiep khoa hoc kT thuat md tien tiin md quoc vi su phat te - triin 2010 bin vung • Thu hoach va tro ciia san pham than sach o thi nghiem tuyen lien tuc cao hon so v o i cac t h i n g h i e m t u y l n gian doan D i l u la o t h i n g h i e m tuyen l i e n tuc k h o n g thao san p h i m trung gian, h a m l u o n g pha ran m a y tuyen hau n h u k h o n g thay d o i , l a m cho lop tang soi va l o p h u y l n p h i i giua cac kenh nghieng o n d i n h h o n h o n g qua t r i n h t u y l n K e t l u a n v a k i e n n g h j T i r cac k i t qua n g h i e n c u u t u y e n than cap hat - m m tro t r e n % ciia m o than H a T u bang m a y t u y l n t i n g soi, co m o t so ket l u a n v a k i e n n g h i sau: «v i f S f t • M a u than H a T u dua tuyen h e n thiet b i tuyen tang soi cho ket qua tuyen kha cao v o i h o than sach tir 21 - 28%, thu hoach than sach tir 52 - % v a h o da thai I o n h o n 75%; • D a danh gia d u o c sir p h u thuoc ciia cac c h i t i e u c o n g nghe t u y e n vao cac y e u to: f \ r toe dong n u o c tao tang soi; goc n g h i e n g ciia k e n h ; t y so L / z ; r •> r r f • D a xac dinh duoc che cong nghe tuyen tot nhat cho loai than nghien c u u la: toe dong nuoc nguoc = 97,8mm/s; goc nghieng ciia kenh q = ° v a t y s i L / z = 24 T a i gia h i nay, thu hoach va tro than sach; h o da thai lan luot la: 57,93%; 24,09% v a 82,6%; •> r t \ •> y • T h i n g h i e m t u y e n l i e n tuc cho thay m a y t u y e n tang soi l a m viec o n d i n h d o n g t h o i nang suat rat cao (khoang t / m h); r r t t *> t • T i r ket qua n g h i e n ciru h e n nhan thay co the ap d u n g m a y t u y e n R C de t u y e n loai than c a m -3 m m t r o n g thuc te san xuat a m o / Tdi lieu tham khdo: N g u y e n H o a n g Son Nghiin cuu chi tqo thiit bi tuyin tdng sdi di tuyin than hat r f r y cap 0,1-1,0mm phong thi nghiem; T o m tat ket qua n g h i e n c u u de t a i k h o a hoc va cong nghe cap B o , 12-2008 qualities; fraction? R K a l o u Teetered bed separator and its effects the reflux J de K o r t e , J B o s m a n Optimal Classifier; coal processing route for the 3x0,5mm size separation of coarse K P G a l v i n , E D o r o c h i , A C a l l e n , N L a m b e r t , S.J.Pratten "Pilot classifier" particles using M i n e r a l s E n g i n e e r i n g ; 2010 plant trial of ; M i n e r a l s E n g i n e e r i n g 15; 2002 K P G a l v i n , A C a l l e n , J.Zhou, E D o r o c h i "Performance separation at full scale"; of the reflux classifier M i n e r a l s E n g i n e e r i n g 18; 2005 E D o r o o d c h i a, J Z h o u a, D F Fletcher b , K P G a l v i n , 2006 "Particle classification in a fluidized V o l 19, trang - bed containing parallel inclined G N g u y e n t r a n l a m , K P G a l v i n , 0 "Particle classifier" fines The South A f r i c a n Institute o f M i n i n g and M e t a l l u r g y , 2006 for the gravity plant The South A f r i c a n Institute o f M i n i n g and M e t a l l u r g y , 2006 K P G a l v i n , A M Callen, S Spear Gravity the Reflux on the Navigation plates" 747 M i n e r a l s Engineering, classification M i n e r a l s Engineering, V o l 14, S i , trang 1081-1091 size in the reflux ... tuyen l i e n tuc, ket qua t h i n g h i e m cho B a n g Bang Ket qua thi nghiem Ten san T h u hoach, pham % tuyen lien tuc T h u hoach, Do tro, % T e n san p h a m % D o tro, % Than sach 1,42... Thuc Ty A SO L/z T e n san pham Thu hoach, % Do tro, % thu than sach, Thuc Ty A SO L/z T e n san pham Thu hoach, % Do tro, % % thu than sach, % Than T h a n sach 60,39 26,42 sach 48,46 21,2 gian... dp cap ddng Ten san pham Thu hoach, % D d tro, % Than sach Trung gian Da thai Cong Than sach Trung gian Da thai Cong Than sach Trung gian Da thai Cong Than sach 52,66 19,89 27,45 100 54,39 19,22