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Thong tin khoa hoc cong nghe m oKET QUA NGHIEN CUU TUYEN QUANG SUNFUA CHI KEM NGHEO TAI MO BA BO-BAC KAN
The paper represents the research results on the low grade lead - zinc sulphide ore separation works at Ba Bo mine. Bac Kan province with the contents of lead and zinc in the initial ores are 1.78% Pb and 1.39% Zn, respectively , The results sho\y that, after the separation, the fine ore with
the content of more than 50% Pb and 50% Zn and the net receipts of 60% Pb and 88% Zn has been recovered
ThS. NGUYEN HUY HONG ThS. NGUY£N VAN MINH Vidn Khoa hoc Cdng ngh$ Md - Vinacomin
Bien tap: ThS. Hodng Minh Hung
I.Dgtvandd
Q Vigt Nam da phdt hidn nhieu tu khodng va diim quang ehi kem, mot s i diem da duge tham d6 vd khai thac trong nhieu nam qua, nhung tdi nguyen qugng khdng Idn, h i u hit cde md ddu c6 quy m6 nho, trung binh. Qugng chi kem phdn b i ehu y i u d cde tinh Thdi Nguydn va Ble Kan, cdc xudng tuyin chi, kem d cac tinh nay chu y i u tuyin qugng sunfua vd hogt dgng c6 hidu qua khi tuyen loai quang vdi ting ham lugng ehi kem trdn 7%. Tuy nhidn, do nguon qugng chi kdm CO ham lugng cao nhu tren ngay cdng can kiet, ndn cae xudng tuydn phai tinh den tuyin qugng chi kdm eo ham lugng thip de tan thu tai nguydn vd ddp ung nhu c i u thj trudng. Md quang chi kem sunfua Ba B i vung Chg Ddn - Bac Kan Id md cd tru lugng Idn vdi tdi nguyen dg bdo hon 7 tridu t i n quang, trong do trii' lugng qugng cd hdm lugng thap (ham lugng Pb+Zn dudi 7%) chiim ty le tuong d i i Idn, vi vdy viec nghien euu tuyin quang sunfua ehi kem ngheo tgi mo Ba Bo Id rat cin thiet.
2. M l u nghien euu
De cd CO sd nghidn euu, Iga chgn e6ng nghe tuyen qugng chi kdm ngheo, nh6m nghidn euu da Ily mau tgi diem qudng md ehi kem Ba B6 - Ble Kgn. Kit qua phdn tich thdnh phan vat chit, thdnh phin h6a hpc va thanh phin dp hgt cua mau thi nghidm dugc the hidn lln lugt tai bang 1, bang 2 vd bang 3.
Nh$n xet:
- Khodng vat chi trong m l u ton tgi d dgng
• galenit vd khodng vgt kem d dgng sphalerit, ting hdm lugng 2 khodng vat nay khdng qua 6%, ngoai ra, edn ed khoang vgt ehija sat Id pyrit vd siderit. Thanh phin phi qugng ehu yiu Id thach
Bing 1. Kit qud phin tich thinh phdn khodng vit vd khoing him luang
Ten mau
Qu^ng chi kem
B a B d
Thinh phan khoing v$t
- Sphalerit - ZnS - Galenit - PbS - Pyrit - FeS2 - Siderit - FeCOs - Thach anh - Si02 - Canxit - CaCOs - F e l s p a t - KosNaosAISiaOa - Dolomit - Ca(l\/lg,Fe)(C0s)2 -lllit-KAl2[AISijO,ol(OH)2 - Clorit - Mg2Al3[AISi30iol(OH).
Khoing ham luvmg
(-%)
1+2 2 ^ 244 3+5 36+38
7+9 1+3 8+10 27+29 1+3 Bing 2. Kit qui phin tich thinh phin khoing v$t vi thinh phin vat chit
Tin mau BaBd
(%)
Pb 1,78Zn Pi) 1,39
Fe
(%)
5,25 As
<%)
0,51 Ag (ppm) 86,55
(%)
Sn0,02 anh va khoang vat set, ngodi ra, edn cd canxit vd dolomit. Cac khodng vdt cd ieh xam nhiem khdng d i u , cd hat xdm nhiim r i t mjn n i m trong khoang 0,01-0,2mm. Cac khoang v^t cd ich ton tai trong cac khe nut cua phi quang gdy kho khan eho vigc tuyen tdch chi, kem vd thu hoi eac khoang san cd ich.
- Ham lugng Pb 1,78% va Zn 1.39% Id thap so vol cdp nguon quang d i u vdo eung c i p cho cac xuong tuyin hien nay.
- Chi va kem phan b i tugng d i i ding d i u d
KHCNM s d 12/2015* CN TUV^N, CHE BIEN THAN - KHOANG SAN
Thdng tin khoa hoc cdng nghe m d
Bing 3. Kit qui phin tich thinh phin dd hat mi Cap hat, mm
-3+2,6 -2,5+1 -1+0,6 -0,5+0,3 -0,3+0,2 -0,2+0,1 -0,1+0,074 -0,074+0,045
-0,045 Tdng
Thu hoach, % 18.80 15,28 12,44 11,26 7,60 6,69 5,10 5,89 17,04 100,00
Ham lut;mg Pb, % 1,62 1,71 1,73 1,75 1,77 1,81 1,90 2,01 1,95 1,7a
u quing chi kdm mi Ba Bi sau khi dip -3mm Ham Iwryng Zn, %
1,08 1,23 1,31 1,36 1,37 1,39 1,60 1,83 1,78 1,39
Thuc thu Pb, % 17,14 14,68 12,09 11,07 7,46 6,80 5,44 6,66 18,67 100,00
Thuc thu Zn, % 14,68 13,52 11,72 11,01 7,40 6,69 5,50 7,76 21,82 100,00 Bing 4. Kit qud tuyin theo sa dd di xudt
San pham
Quang linh Pb Qu^ng linh Zn
Thai Cpng
Thu hoach, %
2,88 2,36 94,77 100,00
Ham lu'png, % Pb
50,06 5,16 0,25 1,80
Zn 1,76 51,73 0,12 1,38
Thu'c thu, % Pb
80,10 6,74 13,16 100,00
Zn 3,67 88,09 8,24 100,00 cdc d p hgt. Ct eac e l p hat mjn thi hdm lugng
chi vd kem c6 cao hon chut it. Dp cdc khoang vdt lidn k i t r i t chat che vdi nhau, ndn phdi nghien de giai phong k i t hach trudc khi dua sang c6ng dogn tuydn.
3. Kit qua nghien cvu
K i t qua nghien euu thanh phan vgt chit cho thiy, Cae khodng vat cd ieh tgi md Ba B 6 l i p nhet d i y trong khe nurt phi quang, xam nhidm khdng d i u va dp xam nhiem r i t mjn, t u 0,01 -^
0,2mm. Vi vdy, phuong phap tuyin hidu qua nhlt dang dugc su dung tgi Vigt Nam cung nhu tren the gidi Id tuyin n i i .
Trong qud trinh thi nghidm da su dyng so do tuyin n i l chpn ridng d i nghien euu mdu qudng ndy, dudi day la k i t qua thi nghidm diiu kign va thi nghidm so do.
3.1. Nghien euu tuyen thi nghiem dieu Iden a. Nghien ciru chon do min nghien hap ly Nghidn euu tuyen n i i edc mau qugng dugc nghiin d i n cac dp mjn lan lugt Id 75%, 85%, 89% vd 94% cap -0,074mm thiy ring, d che do nghien d i n 85% e l p -0,074mm cho k i t qua t i t n h l t . d dp mjn nghien ndy lugng mit mat ehi kem vdo quang thai la it nhlt. Ham lugng Zn vd Pb trong qugng thai chiem (0,1 - 0,2)% Zn vd
(0,12-0,25)%Pb.
b. Nghien cim li/a chon pH hap ly Chpn vdi Idm thuie diiu ehinh mdi trudng eho ca vdng tuydn noi chi va tuyen n i l kem vi vdi khong nhung Id thuoc dieu chmh moi trudng ma n6 c6n e6 tac dung de chim pyrit. K i t qua thi nghigm da xdc djnh dugc pH=8 thich hgp cho v6ng tuyin chinh chi. V6ng tuyln n i i kdm pH=10,5. Tuy nhidn, d cde vdng tuyen tinh chi pH=8,5 Id phu hgp.
c. Li/a chon chi phi thuSc de chim Thay xianua la thuie dpc hgi cho con ngudi vd moi trudng, nhdm can bd thgc hidn de tai da su dyng hdn hgp sunfua natri (Na2S03) vd sun- fat kem (ZnS04) de de chim kem va pyrit. K i t qua thi nghidm dieu kidn eho thiy rang, vdi chi phi 600g/t ZnS04+ 200 NasSOs g/t la hgp ly nhlt. 0 ehi phi ndy thi ham lugng kem trong san pham bgt chi la thip nhlt.
d. Li/a chon chi phi toi wu thuoc tap hap Thuie tap hgp SLP dung o vdng tuyin chi Id etylxantat va d v6ng tuyen n i i kem la butylxan- tat. K i t qua thi nghigm da xdc djnh duge ehi phi thich hgp cua etylxantat la 90 g/t d v6ng tuyin chi va eua butylxantat Id 200 g/t d v6ng tuyen chinh kem.
KHCNM S 6 12/2015* CN T U Y E N . CHE B I £ N THAN - KHOANG SAN
Thong tin khoa hpc cong nghe m o
B u o i thai Hinh 1. Sadd di xuit cdng nghe tuyin quing sunfua chi kdm nghdo md Ba Bd Ddng thdi, treng qua trinh thi nghiem d§ xac - Bang so dd tuyln ndi va eae chet do tuyln dinh dyoe ehi phi tdi u-u thude CUSO4 de kieh phu hop tu' quang sunfua ehi kem ngheo cd thi ddng kem la 300 g/t. nhan duoc quang tinh chi, kem dat yeu cau d l
3.2. Nghien cim tuyen thi nghiem so> do ra >50%.
Su' dung so dd chon rieng tru'c tilp d l tiln h^nh nghien euu tuyen ndi quang chi kem sun- fua ngheo md Ba Bd.
Be nhan du'O'e quang tmh chi dat ham lugng
> 50% Pb vdi thu'c thu 80% thi cin 3 khau tuyln
- Cdng nghd tuyln quang sunfua chi kem ngheo md Ba Bd du'O'e de xuat gdm:
+ Nghien min giai phdng k i t hach d i n 85%
cap -0,074mm.
• Tuyln n i l chon ridng tryc tiep thu hdi ehi tmh Pb vi can 3 khau tuyen vet chi trydc khi cap trydc sau dd tuyln nil thu h&i kem. B l nang eao sang khau tuyen kem. B l nhan dygc quang tinh thyc thu trong khau tuyen kem, nghien lai san kem dat ham lygng >50%Zn, thye thu dat 88%; phim trung glan sau dd ehe san phim sau thi can tuyln tinh Zn 4 lan. San pham trung gian nghiin quay lai khau tuyln ehinh;
cua khSu tuyln tinh kem 1 va tinh quang cua - So dd d l xuit cdng nghe tuyln quang sun- tuyln vet kem 1 dygc nghiin va dya v l khau fua ehi kem nghdo md Ba Bd tuong ddi don tuyln chinh. Kit qua nghien eCru theo so dd de gian, dau ty thap cd t h i ap dung ngay vae san xuat dygc trinh bay tai bang 4, sg dd de xuat xuit nham tan thu tai nguydn./.
tuyln quang sunfua chi kem ngheo md Ba B l Tai lieu tham khio:
dygc t i l l hien tai hinh 1. ., ^jg^^g^ ^uy Hiing,(2015), BSe eao 'Nghidn 4. Kef luan |;|y^ Q^fjg „gf)0 tuyen noi quang sunfua chi - K i t qua nghien eCru g md Ba Bd da dya ra
cac k i t luan sau:
kem ngheo viing Thai Nguydn, Bac Kan nham tin thu tai nguydn", Vien Khoa hoc Cdng nghe Md - Vinacomin.
KHCNM s o UmiS' CN TUVEN, CHE BIEN THAN - KHOANG SAN
