NGHIEN C t f U - T R A O D d
/ N G H I E N CLKU,
THiiT K^, CHi TAO
TAMLOC TIJ PHI KIM LOAI CHO MAY LOC NEN
KliU
NAM N G A N GRESEARCH, DESIGN, MANUFACTURE THE FILTER BED MADE OF NONMETALLIC FOR THE HORIZONTAL FILTER PRESS
KS. Do Thai Cirong, TS. Phan Thach H6, ThS. Mai Quy Sang Vien Nghien ciiu Ca khi, Bp Cdng Thuang
TOM TAT
Phu tung mdy lgc nen diing trong ngdnh Khai thdc md d nuac ta chu yiu la nhgp tir nude ngodi. Gid thdnh rdt ddt vd khdng chii ddng trong sdn xudt. Viec nghien ciiru, thiet ke, chi tgo tdm lgc tie phi kim logi nhdm dap img yiu cdu tren. Bdi bdo trinh bdy tinh todn kiim tra vd cdng nghe chi tgo tdm lgc tie phi kim logi cho mdy loc nen kieu ndm ngang.
TIT khda: Tdm loc phi kim logi, mdy loc nen, cdng nghi chi tgo.
ABSTRACT
All the spare parts of the horizontal filter press in the mining industry in our country are imported from the developed countries. The price is very high and the waiting time is very long.
We do not take initiative in production. Research, design and manufacture the filter bed meet this purpose. The paper presents the testing calculation and the manufacturing technology of the nonmetallic filter bed for the horizontal filter press.
Keywords: The nonmetallic filter bed, the filter press, manufacturing technology. '^
ISSN 0866 - 7056
T4P CHf CO KHi VIET NAM, Sd 1+2 nam 2016 www.cokhivietnam.vn
dudng ranh tren mat khung, giua cac tam ban la cac tam vai loc bang bdng hay spi nhan tao. C ^ khung va tim ban dugc ep lai vdi nhau nhd co ciu ep (eg cau nay cd the la ca cau ca khi hoac thuy luc). Ban lgc cd dang hinh frdn hay hiiih vudng, thdng dung la loai hmh vudng vdi kich thude tu 800x800mm din 2.000 x2.000mm.
Sd ban lgc phu thugc vao cdng s\M cita may, thudng tir 10 din 160, tren cae ban lgc cd mpt 16 trdn, khi cac ban Ipe nay xep l^i vdi nhau thi cac Id trdn nay se tao thanh mdt dng dan dich di vao cac khoang ep Ipe [4].
- May lgc nen kieu nam ngang su dpg trong day chuyen tuyen khoang dugc phan loai theo chiic nang (khir, lgc nude); ket cau (co khi, thuy luc); kich thude tam Ipe (nhd, trung buih va ldn).
- Trong day chuyen tuyen quang apatit:
May loc nen kieu ngang ca ldn dugc sii dung d khau cdng nghe cudi cimg vdi nhiem vu lam khd san phim apatit quang tmh, sau khi da dugc tuyin d nhiing khau cdng nghe trudc. Tam loc thudng la vat lidu phi kim loai, vl do dac thu ciia cdng nghe tuyen khoang.
- Do am cua san pham quang apatit tinh cd thi dat tdi 11-12%. Tai Cdng ty Apatit Viet Nam, may lgc nen kieu ngang ca ldn (model XAMZ300/1500-30U) dupe sir dung tai khau edng nghe thu san pham apatit quang tinh sau tuyen. Muc dich su dung may ep lgc khung ban la de thu san pham d dang khd, thuan loi cho qua trinh san xuat tiep theo.
- Uu dilm cua may ep lgc: Be mat lgc ldn, edng suat ldn, tieu hao nang lugng vira phai.
Cd dp chenh ap cao cho nen hieu suat Ipc cao.
Cd thi ngung lam viec mdt sd khung ban, thao lip thay thi tim ep Ipc, vai Ipc mgt each di dang.
Dien tich lip dat nhd (chi khoang 25m^). Co the tir ddng hoa hoan toan va khdng cin ngudi co - May lgc nen kieu nam ngang la thilt bi chuyen mdn cao lim. Cd chu trinh tu lam sach gdm nhiing ban loc va nhiing tam ban cd nhirng vai loc va dudng dng cap, thoat.
l.DATVANDE
Xuit phat tit yeu ciu thuc tl frong cdng nghiep tuydn khoang ndi chung va tuyen ddng, apatit ndi rieng, may lgc nen kieu ngang cd vai trd khdng thi thilu bdi su uu viet cua nd nhu nang suit cao, di§n tich lap dat nhd, tieu hao nang lupng thip. Do han chi vl thilt bi, cdng nghe, cac loai may Ipe nen kilu ngang ca ldn va phu tung kem theo van phai nhap khau. Viec sira chiia, phuc hdi chi tilt may, thay the nhap khau la rat cap thidt.
2. MUC TIEU VA PHU'ONG PHAP NGHIEN Ciru
- Khao sat thuc tiln tai nha may tuyen khoang, liy miu ehi thu, tinh toan thiet ke cdng nghe che tao phii hgp vdi dieu kien gia cdng d Viet Nam.
- Nghien ciiu, thiet ke, che tao tam lgc nen bang vat lieu phi kim loai cho may Ipc nen kilu nam ngang phuc vu cdng nghiep khai thae quang, thay thi hang nh^p khau tir nude ngoai, nang cao nang lire nganh Ca khi che tao trong
3. KET QUA VA BAN LUAN
3.1. Gdi thieu khai quat ve may loc nen kieu n^m ngang
Hinh 1. Mdy lgc nen kiiu ngang thuy luc
ISSN 0866 - 7056
TAP CHi CO KHI VIET NAM, So 1+2 nam 2016 www.cokhivietnam.vn
NGHIEN CUfU-TRAO D O I
- Nhugc diem ciia may ep lgc: Phai thay hat rin. Trong qua trinh lgc, se cd mdt khdi the tam dd theo ehu ky. Gia thanh tim Ipc la lugng Idn cac hat rin tich tu trong budng lgc, tuang ddi cao. Vai lgc chdng mdn, rach, gia vdi lire ep tu ddng va cac hat ciing trong budng thanh cao. loc phan bd khdng deu se gay hu hdng hay phaithay the.
3.2. Phan tich lya ch9n chi tilt tim loc phi
kin* If*?' c) Lira chon vat li^u che tao tam loc phi kim loai a) Chuc nang va dilu kien lam viec ciia tam loc
- Tam lgc chat lieu polypropylene, be mat lgc cd dien tich ldn, lgc nhanh, chu ky lgc la ngan, cai thien dang ke hieu qua va tinh kinh tl.
- Tam lgc dugc thiet ke va san xuit hang loat, cac bg lgc hieu suit dac biet, ciu hinh khung nhua PP cd tinh chdng an mdn va rira sach.
- Tam ige cd sue khang nhiet do cao, ap suat cao, tu dgng hda cao va bd lgc dien tich lgc ldn.
- Tam kich thude tii 400mm din 1600mm cd dien tieh lgc 0,056 m^ din 2.56m^. Tang cudng tinh chat hda hgc dn dinh tim lgc poly- propylene, chdng an mdn, axit va kiem, mudi an mdn, khdng ddc hai, khdng vi, trpng lupng nhe, do ben eao, va boat ddng dl dang. Tam khudn diic, nhiet dp cao, ap suat cao, ben [1].
b) Cac dang hong cua tam loc
- Tanuihua khung ban va vai la mdt phan quan trgng, trong qua trinh sir dung hi hao mdn.
- Vide dau tien la cac tam lgc bi hu hdng, kit qua luc phan bd tren tam lgc khdng ddng deu gay ra bien dang euc bd trong qua trinh lam viec.
- Tim lgc da bi hu hdng khdng de dang dl nhin thiy, trong qua trinh lam viec chiu ap luc nen, niu mdt tim hi hdng se din den viec hu hdng cac tam khae.
- Dung dich lgc chiia sd lugng ldn cae
Qua phan tich eac vat lieu cd the su dung nhu: PE, PVC, Metyl metacrylat, PPF, nhua novolac, nhua rezol, nhua rezit, composit va nhua UHMW-PE. D I tai da ehgn vat lieu nhua UHMW-PE de chi tao tim lgc vi nd la sy ket hgp cac dac tinh vugt trdi nhu: Kha nang chdng mai mdn, chong va dap, do bin hda hgc va ty: bdi tron tdt; Tinh chat ca hgc cao nen ddi khi edn tdt ban ca thep eac bon, ddng;.. Nhiet dp lam viec la -ISO^C tdi +90''C; cd iing suit chiu nen tdt [o]n- (140-220) MPa [2], d) PhSn tich dac tinh cdng ngh^ trong ket cau tam ep lgc
- Tam dp lgc la chi tiet dang tara cd kieh thude 1600 X 1600 mm, vdi chidu day tdng thi 50 mm. Tren tam ep lgc cd cac dac diem sau:
+ Cd 01 Id 060 xuyen sudt ndi vdi dudng dng cap lieu da cd san trong nha may cd nhiem vu dan lieu vao cac khoang khi bom lieu.
+ Hai ben hdng eiia tam cd cac Id ren (khdng xuyen sudt) lap he thdng banh xe giup tam di chuyen dpc theo he thdng ray duge lip tren than may.
+ (3 giua hdng phia dudi ciia tim cd lo 030 sau 200 mm tao thanh Id thoat nude tren tam ep lgc.
+ Be mat cua tim ep lgc cd ranh chay dgc tao thanh khe rdc nude khi ep va giiip qua trinh pha vd cac tim bdt sau ep khi roi xudng
pheu thu gom san pham. "^
ISSN 0866 7056
TAP CHl CO KHi VIET NAM, So l+2nam2016 www.cokliivietnam.vn
3.3. K^t qua ti'nh toan tSm I9C phi kim loai
* Cdc thong so idch thuac cua tdm loc:
P>46.10''(N)
•" Tinh Idem ben tdm loc:
([3]).
Vdi kich thude bao ngoai ban Igc la Trong trudng hgp may boat ddng binh 1600x1600mm, kich thude long khung la thudng thi ap lire tac dung vao hai ben bl mat 1400x1400mm, chilu day phin giua ban lgc la ^^^ ip^ ^^ ^ing nhau. Nhung khi xay ra sy c6, SOmm, chieu day ban lgc la SOmm (Hinh 2). mdt ban nao dd khdng lam viec (do hi tic) thi
tai bl mat ban ben phia cap li?u ban hoan tota chiu mdt ap luc nen dung bang dgng lire loc AP.
Chinh lire nay lam cho ban hi udn va cd the se pha buy ban neu ban khdng dam bao dp ben cho phep. Trong trudng hgp nay vdi kich thude nhu tren ta cd iing suat ldn nhat [3] la:
_ k.p.a
[a]„ Mpa
Hinh 2. Kich thuac bdn loc
Ta dugc ket qua: a^^= 185 MPa < [o]
n^220 Mpa, dam bao thda man dilu kien ben cua tam lgc.
3.4. D8 xuat quy trinh cdng nghe ehi tao tam lgc phi kim loai
* Xdc dinh luc ep tdc dung len tdm loc - Qua viec nghien ciiu chi tiet nay, ve co theo cdng thuc: ban dac tinh cdng nghe cua tam khdng gi thay
ddi. Ngoai vide dilu chinh mdt sd kich thude
•^ - ^H'^tx "^ P'^h (^) ( 0 '^ho phii hgp vdi dae tinh cdng nghe va gia thanh che tao san phim. D I tai dl xuit quy trinh cong Va nhan dugc ket qua nhu sau: nghe chi tao gdm cac cdng doan nhu sau:
ISSN 0866 - 7056
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NGHIEN CUfU-TRAO D O I
C d i ^ doaai 1: Gia cdng tSm chinh; tren may phay giudmg OIGO
Cdng doan 6: Gia cong bich kep vAi loc; M a y ti^n 1K62
C 6 i ^ doan 7: Gia cdng banh xe di chuyin; M a y tien 1 K 6 2 , M a y phay 6M82IIX
Cdng doan 2: Khoan c i c iS cdng ngh^ tren tSm chinh;
M a y khoan c i n 2 ^ 3 5 , H63A
Cdng do?n 5: Gia edng d i u n6i 6ng c i p khi lam sach; M a y tien IKGAI- 18
Cdng doan 8: L i p ghep, k i l m tra thdng sd
Cdng do9n 3: Gia cdng dng dan lieu;
M a y tien 1K62
Cdng doan 4: Gia cdng d i u noi ong thoat nude; May tien 1K62
Cdng doan 9: Siia chiia sai lech, mai ba via, vd sinh t i m lgc
Hinh 3. Quy trinh cdng nghe che tgo tdm lgc
- Vdi quy trinh cdng nghe de xuat, de tai da che tao thanh edng tam Ipe nen bang vat lieu phi kim loai phu hgp vdi dieu kien gia cdng tai Viet Nam. Qua kiem tra sa bd tai nha may tuyen da xac dinh dupe cac thdng sd ky thu^t phu hgp vdi yeu cau cua san xuat.
4. K E T LUAN
- Tam Ipc lam bang vat lieu phi kim loai trong may lgc nen kieu nam ngang iing dung trong cdng nghe tuyen khoang la chi tiet hay phai thay the, tir trude den nay nude ta ludn phai nhap ngoai tdn kem ngoai te. Viec nghien ciiu edng nghe, thiet ke va che tao trong nude la rat cd hieu qua.
- D I tai da thilt k l va chi tao thanh cdng tam lgc theo mau phu hgp vdi thiet bi hien cd trong nganh Cdng nghiep tuyen khoang Viet Nam dat yeu cau ky thuat, dugc ngudi sir dung chap nhan va eho phep thay the eac t i m Ipc cii bi hdng, budc dSu md ra trien vpng ung dung tdt.*>
Ngay nhan bai: 11/12/2015 Ngay phan bien: 13/01/2016 Tai lieu t h a m k h a o :
[1]. Nguyin Hoang Son; Gido trinh Chudn bi khodng sdn, Tnrdng Dai hoc Mo-Dia chit. Ha Npi, (2003).
[2]. Nguyin Van Bai, Truang Cao Suyin, Kilu Cao Thang; Dap nghiin sdng khodng sdn, NXB. Cdng nhan Ky thuat. Ha Npi (1985).
[3]. Sd tay thiet ke hoa chdt, tap 1,2, NXB. Khoa hoc Ky thuat (2000).
[4]. Nguyin Van Khang; Mdy vd id hgip thiit bi van tdi mo, NXB. Khoa hoc Ky thuat. Ha Npi (2005).
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