Ngay tCf giiia the k^ 20, tri/dc ap li/c tan thu tai nguyen, giam thieu d nhiem mdi tri/dng bai thai, cac nha may tuyen than, cac nha khoa hpc tren the gidi da trien khai nghien ci[r]
(1)NGHIEN Ctru SAN XUAT VAT LIEU XAY DUNG tvi x i t t h a i c a c n h a m a y t u y e n t h a n
Processing waste residue from the coal preparation plants and turning them into the building materials in order to recover national resources, minimize environmental pollution have tyeen studied and widely applied in our country and overseas as well The paper provides a brief introduction on the brick manufacture technology from the waste residue of the coal preparation plants on the worid, the existing situation of the waste residue at the coal preparation plants at Quang Ninh coal basin and some initial results from the brick manufacture from the waste residue of Hon Gai and Cua Ong coal preparation plants
TS NGUVeN ANH TUAN ThS HOANG MINH HUNG ThS NGUYIN HQU NHAN TS NGUYIN QUO'C THINH
&NNK
Vien Khoa hpc Cdng nghe Md • TKV
IVlddau
Theo cac sd lieu thdng ke, hang nam cac nha may tuyen than CCfa 6ng va Hdn Gai dang 60 thai da xi't bd bien vdi khdi lifdng rat Idn, hang trieu met khdi/nam Van de biifc xuc hien la quT da't tren bd bien danh cho dd da xi't la rat han che Trong thdi gian sap tdi se khdng cdn dien tfch da't dai danh cho 60 thai da xi't tii cac nha may tuyen than Nganh than can phai sdm tim giai phap xCf ly' ngudn da xi't thai nay, hoac la van chuyen 60 thai vao bai thai cCia cac mo hoac san xua't che bien da xit thai cac loai vat lieu phuc vu cho xay difng, giao thdng
Mat khac, da xft thai nha may tuyen hien cdn chifa 5-8% than sach dang lam vat lieu san lap 60 lan bien gay lang phf tai nguyen, gay nan khai thac trai phep tan thu than tren bai thai, gay d nhiem mdi trudng va te nan xa hdi
Theo djnh hifdng phat trien nhOfng nam tdi, tinh Quang Ninh se tie'n hanh xay difng mdt sd khu cdng nghiep, cum cong nghiep, cac dii an khu du lich, cac tru sd lam
viec, cau cang, benh vien, tri/dng hpc va khu chung c i / dd nhu cau ve vat lieu xay diing se tang len rat Idn, dd cd gach xay diing Theo thdng ke hang nam, mifc dp tieu thu gach ngdi dat set tren dja ban tinh Quang Ninh va cac tinh lan can la rat Idn Dd'i vdi tinh Quang Ninh nhu cau ve gach nung hien dii bao khoang 1.000 trieu vien/nam va cdn tie'p tuc di/dc tang len nhijfng nam tdi, nha't la dieu kien Thanh phd Ha Long dang tren da xay dung va phat trien cd sd tang Hien nay, nang lut san xua't gach tren 6\a ban tinh Quang Ninh mdi chi dap Lfng dupe khoang 70% nhu cau, sd lifdng thieu hut gach phai bd sung van chuyen tCf cac dja phuong lan can Gia san xua't gach tai Quang Ninh tUdng ddi cao ngudn da't set hiem
Hien nay, nguyen lieu dung cho san xua't gach vin chu yeu la da't set Viec khai thac dat set phuc vu cho san xua't gach da va dang gdp phan lam giam quT da't cho eac nganh cdng ndng ngh[ep, dd thj va nha't la gay d nhiem mdi trirdng De khac phuc tinh trang nay, cac nha khoa hpc
tren the gidi da nghien CLfu cdng cdng nghe san xua't gach nung khdng dung than tif ngudn nguyen lieu da xft thai thay the cho ngudn dat set, da trien khai ap dung rpng rai b chau Au, Trung Qud'c va nhieu nifdc tren the gidi Viec san xua't gach tCf da xft thai nung khdng dung than da dem lai y nghia to Idn cho kinh te xa hdi nhi/ tie't kiem tai nguyen da't, than va nhat la khdng gay d nhilm mdi tri/dng
Trong nhiing nam qua, Vien Khoa hpc Cdng nghe Mo - TKV da trien khai cdng de tai "Nghien ciiu cdng nghe san xua't vat lieu xay diing til ngudn da xft thai tii cac nha may tuyen than", ap dung ket qua nghien cifu da san xua't thilf va difa vao sCf dung xay diing hdn 23.000 vien gach tCf ngudn xft thai cua cac nha may tuyen than CCra Ong va Hdn Gai Ket qua kiem nghiem va sir dung da cho thay, gach nung tii da xft thai nha may tuyen da dat chat lifdng tifdng difdng so vdi gach nung tC/ da't set, tii dd de tai da di den ket luan gach nung ti/ da xft thai cCia cac nha may tuyen than ci Viet Nam cd the thay the difdc gach nung
(2)tl/ da't set, phuc vu cho xay di/ng va trang trf Viec nghien CLfu cdng san xua't gach nung tilf da xft thai da md mdt hifdng mdi ITnh viic XLf ly chat thai ran tCf eac nha may tuyen than nham tie't kiem nang li/png, tai nguyen va bao ve mdi tri/dng
I l o n g quan ve cong nghe san xuat vat lieu xay diing tCr da xit thai tren the gidi
Ngay tCf giiia the k^ 20, tri/dc ap li/c tan thu tai nguyen, giam thieu d nhiem mdi tri/dng bai thai, cac nha may tuyen than, cac nha khoa hpc tren the gidi da trien khai nghien ciJru cac tfnh chat cd ban cCia da xft, so sanh vdi da't set, che bien san xua't thif nghiem gach tCf ngudn da xft thai Ket qua da cho tha'y gach difdc san xua't tif da xft thai ed chat li/png ti/dng difdng so vdi gach san xua't tCf da't set va cd the sCr dung lam vat lieu xay dung cho eac cdng trinh xay difng cdng nghiep, giao thdng va dan dung Do gia san xua't gach tif da xft thai la tifdng ddi cao, nhung de ifu tien giai quye't van de d nhiem mdi trifdng, tan thu va tiet kiem tai nguyen, chi'nh phCi nhieu nifdc tren the gidi da ban hanh cac chfnh sach ho trd ve mien giam thue va khuyen khfch sCf dung gach difdc san xua't tif da xft thai cac nha may tuyen than
O CHLB Nga: Cdng nghe san xuat gach tCf nguyen lieu da xft thai da dupe ap dung tai cac nha may tuyen than Abasebxki, Karagandiski, Novokuznheski vung Luski Thanh phan khoang vat chCi yeu cd da xft thai gdm: SiOj 51,41%; AI2O3 16,36 %; FezOs 8,37% va MKN 22,57% San pham gach ed dp ben nen 110-120 kg/cm^ dUdc cung cap cho cac cdng ty xay dung dan dung va cdng nghiep
6 CH Phap, Occidental Industries (OCI) la cdng ty ndi tie'ng tren the gidi ve chuyen giao cdng nghe san xuat gach tii xft thai Vdi nguyen lieu da xft cd phan ed hat 0-0,5mm chiem ti le hdn 80% va dp tro tCf 90-92%, san pham gach dL/dc san xua't theo cdng nghe cua OCI ed dp ben nen den 300 kg/cm^
Trung Qudc la nifdc trien khai ap dung rpng rai cdng nghe san xua't gach tii xft thai Ngay tii nam 1990, Trung Qud'c da chCi trifdng phat trien nhan rpng cdng nghe san xuat vat lieu xay diing til xft thai vdi khau hieu "san xuat gach
khdng can dat set, ddt gach khdng can than" Chfnh phCi
Trung Qudc da di/a nhieu chi'nh sach L/U tien de nghien CLfu phat trien cdng nghe nhif cho vay vd'n i/u dai de dau tl/, mien giam thue thdi gian dau di/a vao san xua't, khuyen khfch sir dung
Bang Thanh phan khoang vat nguyen lieu xit thai
STT
1
Chi tieu chii ydu ve chat lupng ngudn
xit thai
Do tro A" Chat bdc V^
SiOj
Al,0, Fe,0,
Don Vj tinh
%
% % % %
Ten nhd mdy HaoTai
87,84 7,98 61,3 25,44
3,35
Long Quan
88,39 8,42 67,7 20,93
3,67
Duong Quang
87,98 8,81 64,00 20,93 5,35
gach ti^xi't thai Hien nay, ed tmng tam Idn chuyen tif van chuyen giao cdng nghe san xua't gach tit xft thai md d Bac Kinh, Hac Long Giang va Sdn Ddng Cac nha may san xuat gach til xit thai ndi tieng nhi/ HaoTai, Long Quan d Bac Kinh ed cdng suat 60 trieu vien/nam; Du'dng Quang d Sdn Ddng co cdng suat 50 trieu vien/nam Chat li/png gach cd dp ben nen dat til 250 - 300 kg/cml Gia san xuat khoang 0,2-0,3 te/vien Dac diem phan khoang vat ngudn nguyen lieu xft thai dU'dc the hien bang
Qui trinh cong nghe san xuat gach tii da xft thai cd the difdc tdm tat bao gdm cac bi/dc nhi/ sau:
1 Nghien da xft den -1,5mm; - Lam am, trdn deu; - 0; - t p djnh hinh; - Say; - Nung; - Ddng gdi, tieu thu
Tdm lai, cdng nghe san xuat vat lieu xay diing tii da xft thai nha may tuyen tren the gidi la ddn gian, ap dung kha phd bien San pham gach san xua't tl/ da xft thai dat chat li/png ve dp ben nen, ud'n tLfdng di/dng so vdi gach san xua't til da't set va di/dc si!f dung chii yeu lam vat lieu xay diing De ap dung vao thiic te san xuat d Viet Nam nham tan thu tai nguyen va giam thieu nhiem mdi tri/dng, viec trien khai nghien ciifu, san xuat thCf nghiem la rat can thiet
II Nghien ciiru san xuat gach lam vat lieu xay dimg tir xit thai
1 Ket qua nghien cdu san xudt gach tCrxit thai qui m6ph6ng thi nghiem
(3)TL/ nam 2004 den nay, Vien KHCN Md da tien hanh cac npi dung nghien cifU sau:
1- Nghien ci/u cac tfnh chat hoa ly' cCia da xft thai, so sanh vdi da't set dijng lam nguyen lieu san xuat gach: Thanh phan SiOz; AI2O3; FejOs; CaO; MKN; dp mjn
2- Nghien CL/U cac giai phap nghien, pha trdn, tao ngudn nguyen lieu de san xua't gach tif da xft
3 - San xuat thCf nghiem qui md phdng thf nghiem vat lieu xay diing tii ngudn da xft thai nha may tuyen than CCfa Ong, Hdn Gai Thf nghiem cac tfnh chat ed ly cDa gach nung tif xft thai theo tieu chuan: dp ben nen; dp ben ud'n, dp hut nifdc, khdi lifdng rieng, dp co ngdt say va nung
4- San xua't thCf nghiem 23000 vien gach tCf da xft thai tif cac nha may tuyen than CCfa Ong va Hdn Gai Di/a vao
sCf dung toan bd san pham gach nung tif xft thai
Ke't qua thf nghiem da cho thay gach difdc san xua't tCf ngudn xft thai cd chat lifdng tifdng di/dng so vdi ngudn nguyen lieu tCf dat set, Vien da sCf dung toan bd sd gach difpc san xua't til da xft di/a vao xay dL/ng khu nha xi/dng, van phdng eCia Vien Ket qua nghien cifu chi tiet difpc the hien tren cac bang 2, 3, 4, 5, 6,7 va
Ten nha may
Tuyen than CiJfa 6ng Tuyen than Hon Gai
Khdi lupng xit ddthai tUmdt sdnha may tuyen than vung Quang Ninh (trieu tan)
2004
1,05 0,41
2005
1,26 0,44
2006
1,45 0,48
2007
1,55 0,52
2008
1,60 0,55
2009
1,65 0,59
2010
1,68 0,64
Bang Thanh phan dp hat dd xit thai tUcdc nhd may tuyen than Cua Ong, Hdn Gai
STT
1
Cap hat (mm)
>50
35-50 15-35 6-15
1 - -
Cdng
Xit thai tUnha mi Thu hoach (%)
6,33 15,30 27,82 22,79 5,22 22,53
100,00
\y tuydn than Cua Ong Dd tro (%)
86,18 83,29 82,87 78,20 77,07 73,89
79,75
Xit thai tUnha may tuy&i than Hdn Gai Thu hoach (%)
3,5 16,54 25,63 28,74 12,87 12,72
100
Dp tro (%)
87,45 85,47 84,34 80,11 76,42 74,81
81,19
Bang Thanh phan than xit thai tUcdc nha may tuyen than Cua Ong, Hdn Gai
STT
1
Ten san pham
Than Da xft
Cpng
Xit thai tUnha mdy tuyen than Ciia Ong
Thu hoach (%)
12,68 87,32
100,00
Dp tro (%)
42,93 85,45
80,06
Xit thai tUnha may tuydn than Hdn Gai
Thu hoach (%)
9,26 90,74
100
Dp tro (%)
45,40 85,68
81,95 Bang Thdnh phan khoang chat cua dat set va xit thai tUnha may tuydn than Hdn Gai,
Mlu thurnghiem
DSX set Ha Khau
Oat set HiKu Hi/ng DSft set Kim Sdn Xft thii CiJfa Ong Xft thii H6n Gai
Do tro A''%
79,46 82,16
Si02%
61,81 60,54 60,04 62,21 59,46
Al203%
25,22 24,79 23,12 19,27 26,85
Fe203%
5,32 5,26 5,95 7.40 4,98
CaO% 1,73 1,74 2,17 1,46 2,16
MgO% 1,04 1.04 1,59 1,48 1,33
Cua Ong
TiOA 0.23 0,24 0,36 0,18 0,21
(4)Nhan xet:
- Trong da xft thai tis cac
nha may tuyen than CCfa Ong va Hdn Gai deu cdn chifa lifdng than tu'dng ddi cao, ti le dao ddng 7-10%, can tie'p tuc tan thu sCf dung vao muc dfeh khac
- Do lifdng than xft thai cdn kha cao nen nhiet lu'dng phuc vu cho nung gach la qua Idn, se lam phdng rdp va giam chat lifpng gach, vi vay can thiet phai tach thu hdi
Bang Thanh phan hod hpc
than tri/de difa vao lam nguyen lieu san xuat gach, cho nhiet li/dng da xft lam gach dao ddng khoang 500-600 Keal/kg
- Ket qua phan ti'ch phan hoa hpc, phan khoang eCia cac mau da xft thai tii nha may tuyen than CCfa Ong va Hdn Gai so vdi dat set lam gach la ti/dng di/dng
Tdm lai, phan hoa
hpc va phan khoang vat
cdc mau da xit thai
cCia da xft thai cac nha may tuyen than CCfa Ong, Hdn Gai va mau dat set sCf dung lam gach cd tfnh chat gan gidng Nhi/ vay, hoan toan c6 the sCr dung ngudn da xft thai tii cac nha may tuyen than de lam nguyen lieu san xuat gach phuc vu cho xay dung De lam nguyen vat lieu san xuat gach, da xft tuyen than Hdn Gai va CCfa Ong can phai dU'dc tuyen tan thu than, sau dd di/a
Mau
Da xit tuyen than Cufa Ong
Oa xit tuyen than Hon Gai Oat set Ha Khau
Oat Hiiu HLfng
Bang Thanh phan khoang (
4*% 80,3 82,16
zua xit thi
SiOi'/c
62,56 59,46 60,54 61,95
i/ va dat s
Alfi3%
21,67 26,85 24,79 19,73
et
FejOi'/o
7,17 4,98 5.26 6.47
CaO%
0,84 2,16 1,74 1,45
MgO%
0,9 1,33 1,04 1,49
MKN%
6,25 5,7
TT
1
Mau
Da xi't tuyen than Hon Gai
Oa xit tuyen than Cvsa Ong Mau da't set
Caoli nit
13 10 15
Hydro mica
27 32 22
Clorit
12 13 10
Thach anh
39 35 37
Felspat
6
Gotit
-6
Kvat khdc
Amfibol Amfibol Amfibol
Bang Thanh phan dp hat ciia xit thai vd dat set
Ten mau
Ba xit tuyen than CCfa Ong
Oat Ha Khau Oa xft tuyen than Hon Gai
Cap hat (mm),%
0 + 0,315 61,4 61,0
0,315 + 0,63 21,19
19,0 47,13
0,63+1,25 14,66
17,0 24,60
1,25^3,0 2,68
3,0 28,27
>3 0,06
Bang Ket qua xet nghiem chat lupng gach tUxit thai qui md phdng thi nghiem
Ky hieu mau
M1 M2
Gach tii dat set M50-M150 nghien de'n -3mm Da xi'1
Dp ben nen, Kg/cm^
87 80 50-150 sau Chat
Dd ben udn, Kg/cm^
68 72 16-28 Lfdng gach til
Dp hut nudc%
8,2 8,4 8-18 xft thai tl
Klupng the tichg/cm'
1,14 1,10
hai tren day
Klupng rieng g/cm^
2.62 2,60
chuyen cdng nghien dU'dc gia cdng
lam gach theo nhif qui trinh lam gach tii nguyen lieu da't set, diem khac biet la d cho khdng dung than de nung
tifdng dL/dng tieu chuan loai gach mac 75 den 100
2 Ket qua trien khai thur
nghiem san xuat gach tir xit
nghiep
can CLif vao ket qua nghien cijfu qui md phdng thf nghiem, Vien Khoa hpc Cdng nghe Mo
(5)da tiep tuc trien khai san xua't thCf nghiem gach t i i da xft thai tren day chuyen cdng nghiep tai Xf nghiep gach Ha Khau va Xf nghiep gach Binh Minh Sd dd cdng nghe san xua't gach tif xft thai di/dc the hien tren hinh Ket qua san xuat gach thCf nghiem tCf xft thai cac nha
may tuyen than CCfa Ong va Hdn Gai di/dc the hien tren cac bang 9, 10 va 11
T i i ket qua san xua't thCf nghiem, da rut cac nhan xet sau:
1- Da xft tif cac nha may tuyen than CCfa Ong va Hdn Gai cd phan khoang
chat ti/dng di/dng so vdi da't set nen cd the dung lam nguyen lieu phuc vu cho san xua't gach vat lieu xay di/ng
2 - Gach san xua't til nguyen lieu da xft dat cac chi tieu chat li/png tifdng di/dng
Nguyen lieu da xft thai nha may tuyen
He thong nghien mjn chuan bj nguyen lieu
He thong, lam am, 0, che bie'n tao hinh
Kho chLfa san pham gach
; Lo say, nung
Hinh So dd cdng nghe san xuat gach tUxit thai
Bang Ket qua san xuat 2700 vien gach loai id QTC 220x105x60mm tUda xit thai Hdn Gai tren day chuyen xi nghiep gach Ha Khau
Ky hieu m l u 100%xft
95%xft 90%xft 80%xft Gach tif d^t set
I\/I50-M150
Do ben nen, Kg/cm'
71,04 67,37 62,71 52,74 50-150
Do ben udn, Kg/cm'
66,00 66,00 81,00 88,00 16-28
Do hut nude, % 10,49 10,20 10,16 9,75 8-18
K.lircing the tich g/cm'
2,39 2,35 2,51 2,59
K.IUOng rieng g/cm^
1,28 1,25 1,14 1,18
Bang 10 Kei qua san xudt 20000 vidn gach loai Id QTC 220x105x60mm tU da xit thai Hdn Gai tren day chuyen xinghipp g^ch Hufu Hung
Ky hieu mau 100%xft
95%xft 90%xft 80%xft
Gach tir dat set M50-M150
Do ben nen, Kg/cm*
73.44 67.20 66,60 65,82 50-150
Do ben udn, Kg/cm'
44,00 69,6 51,59 55,07 16-28
Do hut nirdc, % 10,41 10,37 10,28 10,62 8-18
Khdi luong the tich
g/cm^ 2,32 2,34 2.45 2,52
Khdi lUdng rieng g/cm'
1,26 1,24 1,16 1,19
Bang 11 Kdt qua san xuat 2300 vien gach loai Id QTC 220x105x60mm tU da xit thai Ciia Ong trdn day chuyen xinghipp gach Binh Minh
Ky hieu m l u 100%xft
95%xft 90%xft 80%xft Gach tCfd^t set
'M50-M150
Do ben nen, Kg/cm*
74,15 69,41 64,38 58,97 50-150
Do ben udn, Kg/cm*
65,12 64,37 76,41 78,34 16-28
Do hut nude, % 10,32 10,68 10,44 10,57 8-18
K.lUdng the tich g/em^
2,36 2,34 2,45 2,56
K.lUdng rieng g/cm'
1,21 1,24 1,19 1,18
(6)so vdi gach nung tif dat set mac 75-100 Dp hat cang mjn thi chat li/dng gach cang tdt, mlu ma gach cang dep Cha't li/png gach til xft thai ve chi tieu chju nen, chju ud'n la tu'dng di/dng so vdi gach til dat set
3 - De cd the lam nguyen lieu chat lifdng cao phuc vu cho lam gach, da xft thai tif cac nha may tuyen than tren can tiep tuc qua cdng doan tuyen che bie'n tan thu than sau difa qua cdng doan nghien mjn
4- Da xft thai tCf nha may tuyen sau tan thu than va nghien mjn, cd the la nguyen lieu san xua't gach thay the cho da't set
3 Kei qua thurnghiem tan thu than tCfxit thai nha may tuyen tren day chuyen cdng nghiep
Ket qua phan tfch cac dac tfnh xft thai nha may tuyen da cho tha'y dp tro cCia da xft khoang 80%, cd nghTa la cdn mpt lifpng than nha't dmh can phai thu hdi Chat lifdng nguyen lieu da xft de lam gach phai dat chi tieu ve nhiet li/dng khdng Idn hdn 700 kcal/kg, tiirc la dp tro khdng nhd hdn 86% De thu hdi than da xft thai nha may tuyen, Vien KHCN Md nam 2007 da tien hanh thCr nghiem tuyen 300 tan da xft nha may tuyen CCfa Ong tren
day chuyen tuyen ba sang bang cdng nghe huyen phij tii sinh tai Cdng ty than Quang Hanh (bang 12)
Ti^ ket qua thCf nghiem tuyen tan thu than da xft thai da cho thay, bang cdng nghe huyen phu tii sinh cd the tan thu difpc than nhiet li/dng tha'p, tl le thu hdi tii 15-20% Viec tan thu than tri/dc cap cho nha may san xuat gach la can thie't vdi muc tieu la dam bao chat li/dng da xft sCr dung lam nguyen lieu san xuat gach va tan thu tai nguyen than
4 Gidi thieu mot sd noi dung chu yeu cua di/an dau tu xay dung nha mdy san xuat gach Cam Pha tif xit
thai tuyen than Cua Ong can CLir ke't qua nghien CL/U san xuat thCf nghiem va sCf dung gach tCf xft thai nha may tuyen, Vien KHCN Md da tien hanh lap dii an dau tif xay diing nha may san xua't gach cdng suat 30 trieu vien/nam Cac dac diem cd ban cCia dii an tren gdm:
1- Dja diem nha may: Tai khu lan bien thudc dii an xay diing khu cdng nghiep Cam Pha Tdng dien tfch mat bang (dii kien cho cdng suat 300 trieu vien/nam) khoang 36 hecta
2- Ngudn nguyen lieu: Da xft thai til cac nha may tuyen than CCfa Ong
3- Cdng suat: giai doan de'n nam 2012: dat 30 trieu vien nam, sau nam 2012: dat 60 trieu vien/nam tien tdi 300 trieu vien/nam vao nam 2020
4- San pham chCi yeu va thj trudng tieu thu: San pham ctiCi yeu cCia nha may gdm c6 than cam cap cho nha may nhiet dien sC^ dung than nhiet lUdng thap va gach QTC 210x105x55 cac loai Thj tn/dng tieu thu chCi yeu la tinh Quang Ninh, tien tdi cac khu viiC khac
5- Cdng nghe nha may: Gdm phan xi/dng chfnh, khu tuyen tan thu than va khu san xuat gach,
+ Phan tuyen tan thu than sCf dung cdng nghe tuyen than ba sang bang huyen phu tii sinh, cong nghe dang dUdc ap dung rpng rai tai cac md than vung Quang Ninh Than sach cap cho nha may nhiet dien Cam Pha, da xft thai cap dio nha may san xuat gach
+ Phan san xuat gach bao gdm cac cdng doan: dap; nghien mjn da xft; phdi trdn lam am, Ci; ep tao hinh; say, nung; bdc dd, xep san pham
Dac diem ddc dao cCia cdng nghe nha may san xuat gach tif xft thai theo phuong an de xuat la hoan toan tii dpng "dau vao la da xft, dau la gach thUOng pham cac loai", gach tif nung chfn khdng can than
Bang 12 Ket qua thu nghiem tuyen 300 tdn xit thai nhd may tuyen than Ciia Ong bang cdng nghe huyen phu tusinh
STT 1 2 a b c 3
Ten san pham
Da xit vao sang Than sach tdng sd
Than cam xft Than cam tuyen Than bijn xft
Da thai sau tuyen
So li/dng (tan)
300
73
37 26 11
227
Thu hoach ( % ) •
100
24.40
12.20 8.70 3.50
75.60
Do tro (%) 79.50
57.81
65.50 43.60 66.30
86.50
Thiet bjxdp gach ti/ddng (Trung Qudc)
(7)He thdng say, nung gach (Binh Minh, Viet Nam)
>BNiL«AS«Ii«*4*£^'1
Thidt biep tao hinh gach ddng (Trung Qudc)
H^ thdng say, nung gach (Binh Min.^iViet Nam)
Khai thac tan thu than tren bai xit thai Ciia Ong
Bdbien khu Cam Pha cdn lai danh cho ddxit thai
6- Cac chi tieu kinh te ky thuat chu yeu (difdc the hien tren bang 13)
Ket luan:
Sau nghien cOu cac dac tfnh da xft thai t i i cac nha may tuyen than CCfa Ong va Hdn Gai, tien hanh che bien san xua't thCf gach tif ngudn nguyen lieu da xft, sCfdung thCf nghiem xay dung cdng nghiep va dan dung de tai da di den cac ket luan sau:
1- Hien mat bang cho
66 thai da xft til cac nha may
tuyen than dang la van de bifc xuc cCia nganh than, can dien tfch hang tram hec ta mdi nam
6e66 thai Viec xCf ly da xft thai
nham tan thu tai nguyen than va cac chat khoang, bao ve mdi trudng la rat can thiet va cap bach khdng nhOmg chi rieng cho nganh than ma cdn cho cac nganh cdng nghiep khac
2- Da xft til cac nha may tuyen than CCfa Ong va Hdn Gai cd phan khoang chat tifdng difdng so vdi da't set nen cd the dung tdt lam nguyen lieu phuc vu cho san xua't gach, vat lieu xay diing Gach san xua't tif nguyen lieu da xft t i i nung khdng can nhien lieu than nhifng dat difpc cac chi tieu chat li/dng ti/dng di/dng so vdi gach nung tLf da't set cd sCf dung than ddt
3- Viec trien khai ap dung
cdng nghe san xua't gach tCf da xft thai nha may tuyen se dat difpc nhieu muc dich, y nghTa ve kinh te va xa hdi: tan thu tai nguyen, tiet kiem sCf dung da't, giam thieu d nhi§m mdi tnfdng, tao viec lam cho ngUdi lao dpng, gdp phan nang cao hieu qua san xua't, kinh te xa hpi chung cCia toan nganh
Kien nghj:
Vdi muc tieu tan thu tai nguyen va giam thieu d nhiem mdi tri/dng, theo kinh nghiem cua Trung Qud'c va cac nifdc tren the gidi, Nha ni/dc ta nen khuyen khfch sCf dung gach san xua't tif da xft thai, ho trd cho cac doanh nghiep san xua't gach tif xft thai bang chfnh sach mien giam thue va cho vay vd'n i/u dai./
Tai lieu tham khao:
1- PGS.TS Phung Manh Oac "Nghien ciru cac giai phap khoa hoc va cong nghe nham huy dong tdng hop tai nguyen phuc vu chie'n li/dc phat trien be viJmg khai thac va suf dung than d Viet Nam", Vien Khoa hoc Cong nghe Mo - TKV, 2006
2 - TS Nguydn Anh Tuan "Dif an dau tif xay dung nha may san xua't gach tCf xit thai nha may tuyen than Cifa Ong", Vien Khoa hpc Cong nghe Mo - TKV', 2008
Bang 13
STT 1
2
4
5
Cae ehl tieu KT-KT Tdng mifc dau tU m6i Gia trj hien tai thifc (NPV Tf le lai npi tai (IR) Thdi gian hoan vdn (T) Loi nhuan rong: Pn Gia tuyen than Gia ban than
Gia san xua't gach Gia ban gach
Dvt
tr dong tr.dong
% nam Tr dong
d/tan d/tan d/vien d/vien
Gia trj 175.252
17.368 24,63
4,78 210.060 295.694 362.537
895 1200