Thong tin khoa hoc cong nghe mo KET QUA NGHIEN CUU XAC DINH NGUYEN NHAN SU SUY GIAM CHAT LUUNG THAN KHU MO KHE CHUOI TRONG QUA TRINH CHE BIEN, LUU KHO VA DE XUAT cac giai pliap Idiac pliuc nli^m nang[.]
Trang 1Thong tin khoa hoc cong nghe m o
KET QUA NGHIEN CUU XAC DINH NGUYEN NHAN SU SUY GIAM CHAT LUUNG THAN KHU M O KHE CHUOI TRONG QUA TRINH CHE BIEN, LUU KHO VA DE XUAT cac giai pliap Idiac pliuc nli^m nang cao liieu qua san xuat
ThS NGUYEN HUU NHAN ThS MAI VAN TH|NH
KS TRAN K I M TUYtN
Vign Khoa hgc Cdng nghg Md - Vinacomin
Weathering of coal is the tendency of coal to break apart when they exposure to the weather and is known to have many negative effects on coal One of the severe-effects of weathering
on Khe Chuoi ROM coal is that, the shale and middlings disintegrate (degradation in size) or slack very readily when exposure to the weather, particularly when alternatively wetted and dried or subjected to hot sunshine Slacking of shale and middlings causes increasing ash content and yield of fine coal, thus decreasing the value of the fine coal This report introduces the effects of weathering on decreasing the value of the coal and also propose the methods that could be employed in practice to reduce the negative effects of coal-weathering on the processing and storage of coal
\- Md diu
Md than h i m Id Khe Chuli
thupe dja phin xa Tring
Luang, huypn Ddng Trilu,
tfnh Quang Ninh, do Cdng ty
TNHH MTV 91 - Tong Cdng ty
Ddng Ble quan ly v i khai thic,
vdi sin lupng than nguyen
khai dat 330 nghin t i n trong
nam 2011 v i du kiln se dat
450.000 tan trong nam 2012
Khu md Khe Chuoi cd d i e
dilm dja chat rat phipc tgp,
cau true vfa than khdng on
djnh, cd nhieu Idp d i kep,
nhilu khoing vat qugng pint
x i m t i n trong than, than
nguyen khai thudc logi than
xau, dp tro trung blnh tip
45-48% Trudc nam 2011, do
than chit lupng xau, edng
nghe sang tuyln chf cd sing
khd, nhat tay thu cdng v i
nghiln don xd ba sing pha
trdn nen chat lupng san pham
khdng dat yeu cau tieu thg,
phai dk ton kho l i u ngiy tren
ding bai v i bj phong hda, bd
rdi, vd vgn theo thdi gian, d i n
d i n pham d p chat lupng
than ngiy cing suy giam, l i m
anh hudng d i n hieu qua s i n
xult eua Cdng ty TNHH MTV
91 ndi rieng v i Ting Cdng ty
Ddng Bae ndi chung
Dk giai quylt van d l tren,
vide nghien cuu dinh g i i su
suy giam chit lupng than khu
md Khe Chuoi trong q u i trinh
c h l biln, luu kho v i d l xult
c i c giai phip khac phuc la h i t SLPC c l n thilt
II- Nghien cuu dinh gia su suy giam phlm cip chit lup'ng than md Khe Chudi
Trong viec nghien cuu dinh
g i i su suy giam pham elp chit lupng than md Khe Chuli, nhdm thue hipn da tiln hinh khao sit thuc t l tinh trgng than nguyen khai sau khai thic cung nhu tren bai chua, dong thdi lay mau phin tich, dinh g i i chit lupng than sau khai thic cung nhu trong qui trinh luu kho
1- Khdo sdt tinh tr^ng than ngay sau khai thdc vd trong qud trinh Iwu kho
Kit qua khao sat thuc t l cho thay, than nguyen khai
md Khe Chuli thupe logi
m i m , bd, l i n nhieu d i xft kep
de bj phong hda, bd rdi, vd vgn Doi vdi than tren ding
bai ngoai trdi, thanh phan da
xit, bia kep +15mm trong than
bj bd rdi, vd vun thanh c i m
d i vdi mLFC dp r l t Idn
2- Liy mdu, phan tich ddnh gid chit Iwong than ngay sau khi khai thdc
Mau than nguyen khai dieoc
lay tip vfa 5 v i vfa 4 la cic vfa dang khai thic, vj tri lly mau d dlu bing tai, tai cua Id v i dippc sing phan logi cd hgt, dong thdi phin tich xic dinh dp tro
Kit qua phin tfch miu du^ac
trinh biy trong bang 1
Nh$n xet:
Theo kit qua phan tfch mau than trong bang 1 cho thly: ,
- Than c i m khd (0 15)
mm chilm ty le 47 -50% trong than nguyen khai, thude chung logi than cim cd chat lupng thlp tLP cim 6 d i n cim 7
KHCNM SO 4/2012* CNKT HAM LO
Trang 2w Thong tin khoa hQC cong nghd mo
Bing 1 Kit qui phin tich sing miu than nguyin khai via 5
vi via 4 ngay sau khi khai thic
TT
1
2
3
4
5
6
dp hgt
(mm)
+200 80-200
50-80
35-50
15-35 0-15 COng
Vie TH%
160 19,98 9,86 7.40 11,47 49,68 100,00
\5 fl^(%)
79,90 "
67,01 54,65 52,95 50,69 38,60 48,97
Via TH%
3,19 21,62 9,52 7,08 11,91 46,68 100,00
4
A^(%) 1A~Z4
61,01 59,33 57,70 55,32 52,45 56,37
Miu than don x6 -t-lSnun, than cue -t-lSnun, trung gian -t-lSnun,
da xit -f-lSnun (hole miu than nguven khai I
,^ Sing (jf 15 m m ,,
z—I Sau 45
ngiv-.15 ^^^^^^ ^15
Sau 60 ngiv
, Sing 0 15 m m ^
Cin
O Miu phin tfch tro A^
+15 mm
Hinh 1 Sa do thi nghigm gia cdng phan tich xac dinh khoi Iwgng
vi dp tro than cim sinh ra tir don xd +15mm vi tir miu
than nguyin khai
d p hgt (15-80)mm chilm
tf Ip khoang 29%, dp tro tip
53-57% chit lupng tuang
duang c i m 7b d i n 7C
3 - Nghien CLPU xdc dinh
nguyen nhdn sy suy gidm
phim cip chit Iwgng than
trong qud trinh chi bien vd
Iwu kho
Tren ca sd c i c k i t qua
khao s i t thuc t l v i phin tfch
m l u than ngay sau khi khai thic, d l nghien CLPU x i e djnh
su suy giam phlm e l p chit lup'ng than trong q u i trinh e h i biln v i luu kho, nhdm thuc hipn da l l y m l u than luu trong kho ed mai che v i khdng cd
m i i che, vdi c i c logi m l u than sau:
M l u than don xd +15mm, than cgc +15mm, trung gian
+15mm v i 6d xit +15mm eua
than nguydn khai sau khi sing khd tieh c i m
- M l u than nguyin khai
C i e m l u than dupe thf nghidm theo sa d l hinh 1
a Xdc djnh khdi Iwang vd
dC tro than cdm sinh ra tw don x6 +15 mm cue via 5 vd via 4 khi di trong kho c6 mdi che va khdng c6 mdi che
K i t qua x i c djnh khii lupng v i dd tro than cim 0-15mm, trong kho ed mii che
v i khdng ed m i i che dupc trinh b i y trong bang 2 v i 3
Nh$n xdt:
Theo k i t qua phin tfch mau trong bang 2 va 3 cho thly: Muc dp phong hda, vd vgn cua d i +15mm, trung gian +15mm, than cgc +15mm, than don xd +15mm khi de tren bai chCpa ngoii trdi khdng
ed m i i che d l u Idn han rlt
nhilu so vdi khi dk trong kho
ed m i i che, trong dd d i xit +15mm ed miPc dp phong hda, va vgn Idn nhlt, sau dd
l i trung gian bia kpp +15mm
v i culi cung la than cgc +15mm
Da xit, trung gian, bia kep
e l p hgt +15mm bj vd vgn
thinh c i m 6a l i n v i o than, da
l i m t i n g ty Ip thu hogeh than cam trong than nguyen khai
nhung ddng thdi cung lam
t i n g dp tro chung v i giam chit lup^ng than c i m
- Thdi gian luu kho cang dai thi mCpc dp vd vgn thinh
c i m c i n g Idn, ty Ip cim da sinh ra cing nhilu, dp tro than
c i m cing tang, l i m tang muc
dp suy giam phlm d p than
- Trong vdng 15 ngiy dlu
KHCNM s d 4/2012* CNKT HAM LO
Trang 3Thong tin khoa hoc cong nghe md
Bang 2 Kit qui xic djnh khoi Iwgmg vi dp tro than cim 0-15 mm sinh ra tir don xd +15mm cua via 5 va via 4 khi di trong kho c6 mil che
Thai
gian
(ngiy)
0
15
30
45
60
Cim 0-15 mm sinh ra tir don xd+15 mm via 5 Tipdi
+15 mm
TH
so
di
+15
mm
(%)
0
1.21
1,93
2,65
3,20
A'
(%)
83,13
80,63
79,44
79,02
Tir trung gian +15 mm
THso TG+15
mm
(%)
0 0,44 1.23 1,81 2,43
A'
(%)
57,02 56,40 54,47 55,15
Tir than cyc +15 mm
TH
so cyc +15
mm
(%)
0
0,30 0.95 1,64 2.34
A'
(%)
21.36 22,01 21.74 21,39
donxd +15 mm
TH
so don
xd +15
mm
(%)
0 0,65 1,38 2,04 2,65
A'
(%)
67,98 60.35 57.07 55.46
Cim 0-15 mm sinh ra tir don xd +15 mm via 4
Tirdi +15 mm
TH sodi +15
mm
(%)
0 3.72 6.19 7,41 8,95
A'
(%)
75,41 75,72 76,40 76,60
TCr trung gian +15 mm
TH
so
TG +15
mm
(%)
0 0,95 1,73 2,29 3,00
A'
(%)
56,98 53,61 52,25 53,05
Tir than cyc +15 mm
TH
so than +15
mm
(%)
0 0,39 1,44 1,97 2,54
A'
(%)
-22.50 23.25 23.57 24.69
Tir donxd +15 mm THso don
xd +15
mm
(%)
0 1,90 3,45 4,27 5,27
A'
(%)
69,46 65,82 65,22 65.08
Bing 3 Kit qui xic djnh khoi Iwgmg vi dp tro than cim 0-15 mm sinh ra tir don xd +15mm cUa via 5 vi via 4 khi di ngoii trdi khdng cd mil che
Thdi
gian
(ngiy)
0
15
30
45
60
Cim 0-15 mm sinh ra tip don xd+15 mm via 5 Tipdi
*15mm
TH
so
di
+15
mm
(%)
0
3,08
12,37
29,41
44,13
A'
(%)
83,13 84,93 79,82 81,38
TCP trung gian
*15 mm
THso TG+15
mm (%)
0 1,78 6,66 13,69 19,27
A'
(%)
-57,02 71,09 71,72 71.86
TCr than cyc +15 mm
TH
so cyc +15
mm
(%)
0 1.14 2.30 3.38 4,94
A'
(%)
21,36 27,78 27,97 28,39
TCP donxd +15 mm
TH
so don
xd +15
mm
(%)
0
2,21 8,17 18,27 27,00
A'
(%)
68,96 77,58 75,63 76,95
Cim 0-15 mm sinh ra tCP don xd+15 mm via 4
TCpdi +15 mm
TH sodi +15
mm
(%)
0 3,77 12,76 24.48 32,90
A'
(%)
78.41 80,49 81,76 81,92
TCP trung gian
*15 mm
TH
so
TG +15
mm
(%)
0 1,65 4,36 6,47 8,48
A'
(%)
63,98 71,43 71,74 71,46
TCP than cyc +15 mm
TH
so than +15
mm
(%)
0 0,96 3,81 4,89 6,35
A'
(%)
23,50 30,11 30,58 30,39
TCP donxd +15 mm THso don
xd +15
mm (%)
0 2,46 7,99 14.17 18,93
A'
(%)
70,71 73,94 76,61 76,81 ngay sau khi khai thic, mCpc
dp phong hda, vd vgn e l p hgt
+i5mm khdng ding k l ,
nhung sau 15 ngiy t i c dp
tang rat nhanh, khoi lupng
c i m d i sinh ra rat Idn
b Xdc dinh si/ thay doi ty
le thu hoach va dp tro than
cdm trong than nguyen khai
trong kho c6 mdi che vd
khdng co mdi che
K i t q u i x i e djnh su thay doi ty Ip thu hogeh v i dp tro than c i m 0-15 mm trong than nguyen khi d l than nguyen khai vfa 5 v i vfa 4 md Khe Chuli trong kho ed m i i che v i khdng ed m i i che dupc trinh
b i y trong bang 4
Nh$n xet:
K i t qua trinh b i y trong bang 4 eho thly:
- Khi dk than nguyen khai
vfa 4, vfa 5 md Khe Chuoi phong hda ngoii trdi hoge trong kho cd mai che, ty Ip thu hogeh v i dp tro than c i m trong than nguyen khai d l u tang
KHCNM s d 4/2012* CNKT HAM L 6
jl
Trang 4w Bing 4 Kit qud xic dinh sy thay dii ty ip thu ho^ch vd dp tro than cdm trong than nguydn khai Thong tin khoa hQC cong nghg md
khi di trong kho cd mil che vi khdng cd mdl che
Thirl
gian
(ngiy)
0
15
30
45
60
Than nguyin khai via 5
Di trong kho
cd mil che Tyip
rr/o)
49,68 50,01 50,37 50,70 51,02
Ddtro AT/o)
38.60 38.79 38,90 38.97 39,04
Di ngoii trdi khdng cd mil che Tyip
rr/o)
49,68 50,79 53.79 58,87 63,27
Ddtro AT/o)
38,60 39,26 41,58 44.38 46,84
Than nguydn khai via 4
Di trong kho
cd mil che T9ip
rr/o)
46.68 47,70 48,52 48,96 49,49
Ddtro AT/o)
52,45 52.81 52.96 53,04 53.17
Di ngoii trdi khdng mil che T9IP
rr/o)
46.68 47,99 50,94 54,24 56,77
Ddtro AT/o)
52,45 52,95 54,25 55,81 56,78
T i e dp phong hda, vd
vgn, t i c dd gia ting dd tro v i
gia ting ty Ip thu hogeh than
c i m trong than nguydn khai
khi d l phong hda ngoii trdi
Idn han rlt nhilu so vdi
trudng hpp dk trong kho cd
m i i che
- Thdi gian d l than luu kho
phong hda cing d i i thi miPC
tang ty Ip thu hogeh v i muc
ting dp tro cua than c i m
trong than nguyen khai cing
eao, phlm cap than cing bj
suy giam, dge bipt l i khi d l
tren bai chipa ngoii trdi khdng
ed m i i che
Than vfa 5 ed mCpc dp
phong hda vd vgn, muc t i n g
ty Ip thu hogeh v i t i n g dd tro
than c i m Idn han so vdi than
vfa 4 khi d l trdn b i i ehua ngoii trdi
- Nguydn nhin ehu y l u l i m
t i n g ty Id thu hogeh v i l i m
t i n g dd tro than c i m trong than nguydn khai l i do phong hda vd vgn cua d i xft, thinh
c i m d i Idn han r l t nhilu so vdi than cgc
c l n t l chuc sing tuyln
c h l biln than trong vdng 15 ngiy sau khi khai thic
c So sdnh muc chenh Ipch
ty Ip thu ho^ch vd dp tro than cdm trong than nguyin khai
so v&i ban dau khi de than trong kho c6 mdi che vd khdng c6 mdi che
K i t qua so sinh muc chdnh Idch dd tro v i ty l | thu
hogeh than c i m trong than nauydn khai so vdi ban dlu khi
de trong kho ed m i i che va khdng cd m i i che dippe trinh
b i y trong bing 5 D l thj so
s i n h dup'c trinh biy trong hinh 2
Nhpn xdt:
K i t qua trong bang 5 v i hinh 2 cho thly:
Khi dk than tren kho bai
ngoai trdi khdng cd mii che, miPC dp phong hda vd vgn cic
e l p hgt Idn thinh cim d i ,
t i n g r l t nhanh v i Idn han rlt nhilu so vdi khi d l trong kho
cd m i i che
- Thdi gian luu kho cing Idn thi dd tro than c i m cing
t i n g cao, d i e bidt khi d l tren
Bing 5 So sinh mCrc chdnh ipch dp tro vi ty ip thu hogeh than cdm trong than nguydn khai so vdi ban diu khi di than trong kho cd mil che vi khdng cd mil che
Thdi
gian
(ngiy)
0
15
30
45
60
Via 5 Than di trong kho
cd mii che Chdnh
Igchtyip thu hoi Dgr/o)
0 0,33 0,69 1,02 1.34
Chdnh Ipch dp tro DA"
r/o)
0 0,19 0,30 0,37 0,44
Than di ngoii trdi khdng mii che Chdnh
Ipchtyip thu hoi Dgr/o)
0 1.11 4,11 9,19 13,59
Chinh ipch dd tro DA^
r/o)
0 0,66 2,98 5,78 8,24
Via 4 Than di trong kho
cd mil che Chdnh
Ipchtyip thu hii Dgr/o)
0 1.01 1,84 2,28 2,81
Chdnh Ipch dp tro DA' r/o)
0 0,36 0,51 0,59 0,72
Than di ngoii trdi khdng mil che Chinh
Ipchtyip thu hoi Dgr/o)
0 1,31 4,26 7.56 10,09
Chdnh lgch do tro DA r/o)
0 0,50 1,80 3,36 4,33
KHCNM S6 4/2012* CNKT HAM LO
Trang 5Thong tin khoa hoc cong nghe mo
bai chLPa ngoii trdi khdng cd
m i i che Pham e l p than cd
t h i bj giam tip c i m 6 thuang
pham sang c i m 7 phg phlm
ill - Dk x u i t cac giai phap
giam thieu SIP suy giam
p h l m c i p c h i t lu'p'ng than
TLP k i t qua nghien CLPU tren
diy, nhdm nghien CLPU d l xult
c i c giai phip giam thilu su
suy giam pham d p chat
lupng than v i ning cao hipu
qua s i n xult c h l biln than tgi
md Khe Chuli nhu sau:
1 Ap dgng hp thing sing
tuyln, c h l biln than bang
edng nghp tuyln huyIn phu tu
sinh nhlm:
- Ning cao ning luc sing
tuyln, c h l biln, ning cao
pham d p chit luang than
- Giai quylt ton dpng than,
t i n thu t i i nguyen v i giam
thilu d nhidm mdi trudng
2 X i y dung kho ehua than
ed m i i che
- Doi vdi than cgc, ed g i i trj
thuang phlm cao v i dd bj
bge m i u , giam dp i n h , dd vd
vgn khi d l ngoii trdi nen c l n
chLPa trong kho ed m i i che;
D l i vdi c i e chung logi
than edn Igi nen che chan
bang cich phu bat kfn khi luu
kho
3 Dilu ehfnh k l hogeh s i n
xult khdng dk ton dpng than
- Dam bao thdi gian than
luu kho khdng q u i 15 ngiy
sau khi khai thic
- Ting cudng logi bd 6a
l i n trong than ngay tren cua
Id
III K i t luan
1 Than nguyen khai vfa 4 v i
vfa 5 md Khe Chuoi ed chit
lupng thlp, dp tro tmng blnh tip
45% - 48%, h i m lupng luu
14
13
12
11
10
9
8
7
6
S
4
3
2
1
0
'<
w'
/
/^\ r
_^-\
' y
/
M
[lir' %
•
/ / (
/
1'
/
r
.'•'"
_ _ - - j )
14
13
12
11
10
9
8
7
4
3
2
1
0
E
"8
10 20 30 40 SO 60 70
TbM gian (ngiy)
0
- C h t o h l ^ ly lelHthan cim trong TNK V5d4 trong kho to b«n dlu (%) -Chtoh l^Ot t^ le IH than cim trong TNK V5<!< ngoii trM to ban diu (%)
- Oitah 1 ^ ^ U TH than
cim trong TNK V4 Ai
trong kho lo ban diu (%) -Oitoh I6ch t^ If TH than cim trong TNK V4d< ngoii (rdi lo ban diu (%)
- ChCnh 1 ^ dd tro than cim trong TNK V4d^ trong kho lo ban diu (%)
- Chftnh lich d6 tro than cim trong TNK V4 dt ngoii Irdii to ban diu (%)
- Chtoh I6ch dd tro than cim tn»ig TNK VS d^ trong kho lo ban diu (%) -Chinh iCch dA tro than cimlrongTN'KVSd^ ngoii trdi lo ban dlu (96)
Hinh 2 Do thi so sinh mCrc chenh lgch ty lg thu hogeh vi dp tro than cam vdi than nguyen khai khi de than trong kho ed mil che huynh chung tuang d l i cao tir ning cao hieu qua s i n xult,
1,0% 2,2% Than thupe logi md Khe Chuli d n phai:
de bj phong hda biln chit, bd - Dau tu x i y dung he rdi vd vgn, dge biet khi chju t i c thing sing tuyln than su dpng tn,pe tilp cua nang, mua dgng cdng nghp tuyln huyen
v i su thay doi nhipt dp, dp am phu t u sinh nham ning eao trong khdng khf
2 Nguyen nhin d i n d i n suy giam pham chit lupng l i
do edng nghp sing tuyln than thu cdng, ehf ed sing khd, nhgt tay v i nghiln don xd ba sing pha trpn nen chit lupng than thinh phlm thlp, khdng dgt yeu d u tieu thg, phai d l
t i n kho l i u ngiy trdn ding bai ngoii trdi, do bj phong hda nen d i xft, bia kpp trong than don xd v i than nguydn khai t u
ning luc sing tuyen, chu dpng dupe chit lupng s i n pham, giai quylt v l n d l ton dpng than nguyen khai, don
xd b i sing
- X i y dung kho ehua than thinh pham cd m i i che
D i l u ehfnh k l hogeh s i n
xult hpp ly 6k giam thilu
lupng than ton kho./
Tdi lipu tham khdo:
Mai Vdn Thinh vd nnk Bdo cdo tong kit: "Nghien cCni xdc
bd rdi vd vgn thinh c i m xit, cffnA) sy suy giam chit Iw^ng
l i n v i o than c i m , l i m tang dp cua than trong qud trinh che tro Thai gian 6k phong hda bien, ton kho vd de xuat giai than ngoii trdi cing l i u thi su phdp nang cao hipu qua san suy giam phlm elp chit xuat khu mo Khe Chuoi lupng than cing Idn Cong ty TNHH MTV 91"
-3 Dk hgn c h l su suy giam \ ^ ' l " KHCN Mo - Vinacomin, pham d p chit lupng than v i " i ^ " 2012
KHCNM s d 4/2012* CNKT HAM L 6