43 nHm >icn nnuH nui; VA CONG NGHE MO LOVEN KIM ^ ^ KET QUA NGHIEN CUtJ H O A N THIEN QOY TRINH CONG NGHE TOYEN VA SUT DUNG HOP LY QUANG CROMIT CO DINH THANH HOA TS HOANG VAN KHANH, KS NGUYEN C A N H[.]
Trang 143 nHm >icn nnuH nui; VA CONG NGHE MO-LOVEN KIM _ ^ ^
KET QUA NGHIEN CUtJ H O A N THIEN QOY TRINH CONG NGHE TOYEN VA SUT DUNG HOP LY
QUANG CROMIT CO DINH-THANH HOA
TS HOANG VAN KHANH, KS NGUYEN C A N H NHA,
KS PHAM BA KIEM, KS PHAM XUAN KJNH,
KS LE H 6 N G S Q N - Vi^n Khoa hgc va Cong nghe Md-Luyen kim
TS THAN VAN LIEN - Vien Cong nghe Xa hiem
Md crdmit Cd Dinh,Thanh Hoa cd tru lup'ng
gin 20 tridu tin CraOs; khoang 3,0 trieu tin
niken va 300 nghin tin cdban, ngodi ra con
cd tjentdnit Trong nhung ndm vua qua vide khai thde
mang tinh nhd le, manh mun, mdi dung d viee chi
biln thd, chua tdn thu duac eac nguydn td cd ich di
kem nhu niken, coban Cho den nay san phdm chinh
cua md la tinh qudng cromit vdi ham lup'ng 44,0-46,0
mdy da san xult fero crom caebon cao, cdn loai fero
crom caebon tnjng binh vd thip ehua dug'c nghidn
Cliu va san xult Set bentonit la san phdm phy td bun
thai tuy dang dup'c tan thu nhung chi biln rit thu
cdng, nen chdt luang san phdm khdng cao, do vay
pham VI su dung cung han hep,
Dd su dyng hap ly va hieu qua ngudn tdi nguydn
khoang san nay, vide nghidn cuu hoan thidn cdng
nghd tuyln hp'p ly quang crdmit kit hap tdn thu cdc
tdi nguyen ed ieh di kem la rit cdn thilt va la not dung
cua D I tai edp Nha nudc" "Nghien euu hodn thidn
quy trinh cdng nghd tuyln va su dung hap ly quang
crdmit vd eac khoang san di kem trong md crdmit Cd
Dinh, Thanh Hda" do Bg Khoa hgc va Cdng nghe
giao cho Vien KH&CN M6-Luyen kim chu tri Kdt qua
nghidn cuu cua Ch tdi Id can eu khoa hpc tham khao
khi lap cac du an khai thac chi biln tdng hp'p qudng
crdmit C6 Dmh, Thanh Hda
I M I U nghien cu'u
Mdu qudng thi nghiem dup'c lly tgi than qugng I
mo crdmit Cd Djnh Kdt qua nghien cuu thdnh
phdn vat chdt mdu cho thdy khoang cd ich trong
quang Id crompicotit, cde khodng vat di kem cd montmorillonit, antigont, thgeh anh, gatit, limonit, felspat, chlorit, amphibol Thdnh phan hda hpc mdu nghien cuu duac ndu trong Bang 1 Kit qua nghien cuu thdnh phan dd hat thd hien d Bang 2 Kit qua nghidn cuu thanh phdn vat chit miu cho thiy:
•:• Trong mau nghien cuu, khodng vdt ed ieh ehu yiu Id crompicotit d dang hat tu do tap trung chu ydu (tdi 82,38 %) trong elp hat -2+0,020 mm;
•:• Hdm luang niken trung binh trong mau khoang 0,52 % va phan bd kha ddu trong tlt ea eae elp hat, Rieng d edp hat ~5 + 0,5 mm, ham luang niken cd gidu han vd dao dpng trong khoang 0,6-0,8 %,
•:• Quang cd dp hat nhd, muc thu hoach mdu dp hat -0,045 mm ehilm gan 70 %, nen rit dd mit mat quang khi xu ly tuyen
2 Ket qua nghien cuu
2.1 Kit qua nghien cu'u cong nghe tuyen thu hoi quang tinh cromit
Da thu nghiem tuydn trong lyc quang dd hat +0,074 mm trdn cac thilt bj may Idng va vit dung kit hgp vdi bdn dai cat va ban ddi bun d l tan thu
vd nang cao chit lup'ng quang tinh thd Qugng d p hgt mm dup'c nghien cdu xu ly tuydn tren cac thilt
bi bang tai quy dao va mdy tuyln ly tam MGS Qugng tmh thd dug'c nghien cuu nang cao chit lup'ng bdng phuang phap tuydn tu Tu do kiln nghi sa dd cdng nghd tuyln hap ly dp dung vao san xudt tai md crdmit Cd Djnh (H 1) Chi tidu edng nghd du kiln dup'c trinh bay d Bang 3
Bang 1 Thanh phan hda hoc tnau nghien citu
Thanh ph^n
H^m iLfong, %
CrjOj 3,45 FezOj 28,91
SiOz 39,78
Ni 0,518
Co 0,045
P i
<0,001 1
Trang 2^ ^ 45 NAM VIEN KHOA HOC VA C 6 N G
Being 2 Thanh phSn 66 hat mSii nghi&n citu
Cap hgt, mm
-10+5
-5+2
-2+1
-1+0,5
-0,5+0,25
-0,25+0,125
-0,125+0,074
-0,074+0,045
-0,045+0,020
-0,020+0,010
-0,010+0,00
Tong hop
Thu hoach, %
1,08 2,88 4,18 3,31 3,03 7,20 4,18 4,83 6,79 8,95 63,57 100,00
H^m iu'ong
CrjOj 0,36 0,91 1,09 1,81 6,35 13,24 13,06 11,24 7,89 1,63 0,82 3,49
FeiOj 25,55 32,74 43,84 41,92 35,37 30,62 19,40 20,36 21,71 22,88 27,52 27,77
%
Ni 0,353 0,75 0,795 0,639 0,408 J 0,298 0,285 0,344 0,349 0,442 0,547 0,50
CrjOj 0,11 0,75 1,30 1,72 6,50 27,33 15,63 15,54 15,35 4,18 12,58 100,00
PhSn b& "/
FBZOJ 0,99 3,40 6,60 5,00 3,85 7,94 2,92 3,54 5,31 7,37 53,08 100,00
Nl 0,76 4,34 6,66 4,25 2,48 4,31 2,39 3,33 4,75 7,94 58,79 100,00
Phan c.3p xoan
Quang dau
— I —
Danh toi Sang chan dong
Quang tmh thd 1
Tuyen ti> i
Quang tmh thd 2
T
Tuyen tu 2
i
aun thai Set hentonit fNL tuyen va xu" iy hoat hoa bentonit)
Q trung oian 1 Q tmh cromit
(Nguyen it§u san xuat
FeCrva bicromat)
(NL tuyen thu h ™ quang tmh nii<en)
H 1 Quy trinh cong ngh$ kien nghi tuyen qugng Cfomit Co Dmh
Trang 313 nHm i i c n nnuA nuu VA CONG NGHE MO-LUVEN KIM
Bang 3 Chi tieu cong nghe dtr kien tuyin quing crdmit Co Dinh
_ ^ ^
Ten san phSm
Quang tinh
Quang dSu
Thu hoach, % 4,51 100,00
H^m it^ong Cr203, % 49,00 3,40
Thvc thu CriOj, % 65,00 100,00
KMnOg
NiSO; BHiO
NaCI.CaCI;
Quang tmh
\ Tron lidu
Thieu hoan nguyen
Khdng khi
— ^
Sue l;hi U
-Dd niken cacbonat amdni Chung >L
Dei H^SOd
Niken cacbonat bazo
CaiQHl,
J, 1
3-^
Na.cOi
i_ Dung ciich hiia tach
Lam sach tap chat Dci NiSOd
• Thai
Hoa tach pH= 4,5
HjSO,
^^H-Hoa tach
> ^ ^ D - ^ Lam sach tap chat
a chiia, Co T:
!^ Bathai
IMaOH
T
Kiem hoa
H.3 Quy trinh cong nghe thu hoi nken sunfat tii tinh quang nken
2.2 Kdt qua nghien c u u cong nghe t u y l n thu sunfua hda-tuydn ndi va nung hoan nguyen-tuyen hdi nguyen t 6 cong sinh niken tu Qua k i t qua nghien euu, da dua ra quy trinh
D a thu nghiem tuyln thu hoi niken trong quang cdng nghd tuydn hg-p ly thu hdi nguyen td cdng crdmit Cd Dmh bdng cac phuang phap: nung smh niken (H.2) Quang tinh niken ddp ung yeu
Trang 4^ ^
cSu chat lu-ong cong ngh$ che b i ^ n sSu (san xu4t
sunfat niken) Cac chi tieu c6ng ngho dtr l<i4n dyiyc
neu 6 Bang 4,
San Dham
Mau nghien cuu
i
Dap < 2 mm
1 C h i t khu
r — —
Nung hoan nguydn
Tuy4n tu' 1 i
Til' I'htu'-:
r ^ 1
fit (OiiSno tinn Nil S Bharn khOncl ttf
Ndi dung
Chd dd tien xu' ly:
Nhidt dg nung
Thdi qian nunq
Chi phi chdt k h u (than dd)
Chd dp tuydn tu
Tuydn tii 1 (tuyen chinh)
Tuyen tu 2 (tuyen vet)
Chi tieu tuyen
, Ham luang Ni
Muc thu hoach
Thi/c Wiu niken
D a n VI
°C phiit
%
Oxtet Qxtet
%
%
%
s l lup'ng
850
90
8
300
500
> 1 , 2 34,0 65,0
T d ket qua nghidn c u u trong phdng thi nghiem va san xudt t h u quy md eong nghiep (5 000 kg/me) lai Cong ty T N H H C a khi va Xay dumg S a n Thanh, Ninh Binh Da d6 xuat s a dd eong nghe san x u l t fero crom caebon thap bdng p h u a n g phap nhiet silic, quy trinh 2 budc, ngp liQu n i u luyen ferosieocrom sau dd nap voi ndu chay xi, nap tiop tmh quang cromit, nau luyen thu du'o'c fero crom eacbon thap eo ham luong Cr 50-55
%, hdm lup'ng caebon < 1 %, dap ung nhu cdu luyen thep hop kim (H 4) Mdt sd ehi tidu va gia thanh san pham dup'c ndu d Bang 6
Bang 5, Chi ticu cong nglio chr l<i6n san xuit sunfal uikcn
H 2 Quy trinh cong nghe kien nghi tuyen quang niken
Bang 4 Chi tieu cong nglie dw i<ien tuy§n thu
hdi nguyen to cong smh niken
2.3 Ket qua thir nghidm san xuat niken
sunfat theo cong nghe Caron tu> quang tinh
niken Co Dinh
Kdt qua nghien euu eua d l tai da xae ldp dug'c quy
trinh cdng nghd thuy luydn thu hoi sunfat niken t u
qudng tinh niken C d Djnh (H 3) Cac c h i tieu cdng
nghd d u kidn t h i hien d Bang 5
2.4 Ket qua nghien cu'u cong ngh$ san xuat
fero crom caebon thap
D d tai da lua chon va t h u nghiem hai p h u a n g
phdp cdng nghd: nhiet n h d m san x u l t FeCr trong Id
dien vd nhiet silic s u dung fero silico crom lam c h i t
k h u qua trinh hai giai dogn d d Iuy0n fero crom
caebon t h i p
NOi dung
^Che dp hoa tach Nhi^t dd nunq ho^n nguyfen Thoi gian nung Chi phi than da Thoi gian hoa t^ch Nhiet do hoa tach Nona do NH^
Ndng dd C02 Hieu suat hoa tach Ch6 dd chunq c^t Nhiet dd c h u n g cat Thdi gian c h u n g c3l Hieu suat c h u n g cat Hda tan mudi nil<en cacbonat Nhiet dd hoa tan Nong dp axit hoa tan Hieu suat hda tan Qua Innh iam sgch dung dich niken sunfat Hi^u su^t lam sgch
D o n vi
°C phut
%
phut
°C g/1
an
%
°c
phut
%
°C
%
%
%
0 g i li/grng
1000 •
90
4
90
60
65
40 86,10
100
90 98,21
::
50
18 99,63 :'
'
99,74 ;
|Qu3ngtinhcr6mit|| Quaczit Than COC llphuglal -'
L^^"
Ld ho quang FeSiCr
FeCrCacbonthap H
H.4 Quy trinh cong nglie san xuat fero crom caebon thip
VOI Q tinh crdmit
Trang 5; VA CflNG NGHl MO-LUY|N KIM J ^ ^
Sang 6 Cac chi tieu cong nghe chu yeu san xuat 1
tan fero crom caebon thap bing phuung phap nhi$t silic
, , ,T§nv|ttU'
Tinh qu^ng CtjOj
Quaczit
Than coc
Oi\t6i
Di0n cifc tu- thi§u
Dien nang
Ban vi T4n Tin , TSn Tin Tin KWh
S6 luong 3,300 0,660 0,660 0,660 0,106
6533
2.5 K6t qua nghien cu-u cong nghe san xuat
bicromat hop ly "khong chCra canxi" tLF qu$ng
tinh crdmit Co Dinh
Od tdi da thu nghiem san xult bicromat theo
phuang phdp "khdnp chua canxi" d quy md trong
phdng Ihl nghiem nhdm xac dmh cac thdng s6 t i i uu,
thu hoi san phdm dat tidu chudn bicromat cd ham
luang > 99%, dd xudt quy trinh cdng nghd hap ly san
xudt bicrdmat "khdng chua canxi" chdt lup'ng cao tu
quang tmh crdmit Co 0!nh,Thanh Hda (H.5) Cde chi
Heu cdng nghd hep ly duac trinh bdy d Bang 7
Quang tinh cromit
Nguyen lieu hoi lai—-\ Phoi IIGU
1 — • ' T ' P h y g i a
Xdda Phu gi<
O2 "(khdng kh()
K ^ ' f hai Hoa tach 1
X
p=| thai I T-' 1 Nudc rua
bai thai ^ L d n g k - '"
Xi crom) I f
(Xi crom) 3 loc
X
l J h ^ ' * - i X ^ i y I I Trung hda [ ^
^^"^' I Coddc H
Axit hda (H2S04)
Ket tmh Nudc k i l tinh
Na2C03, Li/a chgn duac tdc nhdn hogt hda thich hap
vd dua ra dup'c quy trinh hogt hda bentdnit Cd Dmh (Hinh 6) Thu hoi san phim bentdnit hogt hda phgc vu mgc dich bao vd mdi trudng vd Idm chit tay mdu Mdt
s6 chi tidu cdng nghd <3ir<?c ndu d Bang 8
Bing 7 CSc chi tiSu cdng ngh$ chu yeu san xuit 1 tSn bicrdmat
iang 8 Mot so clii lion c(
hoa bentonit Co Dmh
igti(} xw ly hoat
Chi tieu
Che dd hoat hoa:
Ndng dd axit H2SO4 Thdi gian hdat hda San phim bentdnit hoat hda:
Montmoniionit Ddhat Odam OdpH Dien tich be mat neng
Don vj
%
°C
h
%
^m
% m'/g
S6luong
20 90-100 3,5
70
< 10 10,0 2,5-3,0
200 Set bentonit
Xyclon thu'y' luc
LOG
San ph^m bicromat
H 5 Quy trinh cdng nghe san xult biadmat
tif quang linh CTorgl^^„^„^,„^
2.6 Kit qua nghien ciru cong nghe xtr ly
hoat hoa bentdnit Co Binh
b a thu nghiem phuong phap k i t hop glO-a
tuySn xyclon thuy lu"c v4 xCf ly hda hoc thu hdi san
p h i m bentdnit NghlSn ci>u cdng nghe hoat hda
bentonit bang c i c t^c nhSn axit HCl, H2SO4 v4 kiim
<10|j.ml
- P h a n hat thQ
i
Thai
Hoat hoa bang axit H2SO4
x
Loc rua say kho
Nghien min
San pham bentonit
/-/.fi CHjytrinhcdngn0)§xCi'l;^ho^hdaberadn^c6Dffih
()^m1iSpiiang13)