Escondida imapereka kupuma pantchito koyambirira pakati pa mliri

171113_Escondida_LQ

BHP idati Lachitatu mgodi wawo wamkuwa wa Escondida ku Chile, womwe ndi waukulu kwambiri padziko lonse lapansi, udapatsa antchito ena mwayi wopuma pantchito chifukwa cha mliri wa coronavirus, dongosolo lomwe lidatsutsidwa ndi mgwirizano wa kampaniyo ngati njira yothamangitsira okalamba ndi odwala.

Escondida adati m'mawu ake ku Reuters zoperekazo zipereka "zowonjezera" zopindula zopuma pantchito kwa ogwira ntchito omwe akwaniritsa "zofunikira". Kampaniyo idakana kufotokoza mwatsatanetsatane zomwe zidanenedwazo.

Koma bungwe lawo lamphamvu la ogwira ntchito lati likufuna kunyengerera okalamba ndi omwe ali ndi thanzi kuti apume msanga panthawi yomwe ambiri akufunikabe kugwira ntchito. Zomwe boma lalamula zafuna kale kuti ogwira ntchito omwe ali pachiwopsezo kwambiri aziyimitsidwa kuti ateteze thanzi lawo.

"(BHP) ikuyesera kuthetsa vuto logwira ntchito za odwala ndi okalamba, omwe kupitilira ...

Bungweli lati liyang'anitsitsa mapulaniwo kuti awonetsetse kuti asagwiritsidwe ntchito ngati chinyengo chothetsera ogwira ntchito panthawi ya mliri. Pali ogwira ntchito m'magulu 2,372 pamgodi.

Mkangano pakati pa BHP's Escondida ndi ogwira ntchito m'mabungwe ake umabwera pomwe mliri wa coronavirus waphulika m'chipululu chakumpoto chaku Chile chokhala ndi migodi. Dziko la South America lalemba anthu opitilira 300,000 omwe ali ndi kachilomboka komanso opitilira 6,500 omwe afa.

Nduna ya Migodi a Baldo Prokurica adachonderera makampani amigodi kuti apewe kuchotsedwa ntchito komanso kuteteza thanzi la ogwira ntchito pomwe akusunga zotuluka.

Escondida sanatchule kuchuluka kwa ogwira ntchito omwe akuyembekeza kuti atenga mwayi wopuma pantchito.

Kusankhidwa kwa Zinthu Zopangira Mpira Mill

Zosiyanasiyana zophwanyidwa, zogwirira ntchito zosiyanasiyana zimafunikira ma liner osiyanasiyana kuti agwirizane. Komanso, chipinda chogawirako ndi chopera bwino chimafunikira zingwe zosiyanasiyana.

H&G Machinery imapereka zinthu zotsatirazi kuti muponyere liner yanu ya mphero:

Chitsulo cha Manganese

The manganese zili mkulu manganese zitsulo mpira mphero akalowa mbale nthawi zambiri 11-14%, ndi mpweya zili zambiri 0.90-1.50%, ambiri amene ali pamwamba 1.0%. Pakatundu wocheperako, kuuma kumatha kufika HB300-400. Pakatundu wambiri, kuuma kumatha kufika HB500-800. Kutengera momwe zimakhudzira, kuya kwa wosanjikiza wowuma kumatha kufika 10-20mm. Wosanjikiza wowuma wokhala ndi kuuma kwakukulu kumatha kukana kukhudzidwa ndikuchepetsa kuvala kwa abrasive. Chitsulo chapamwamba cha manganese chimakhala ndi ntchito yabwino kwambiri yotsutsana ndi kuvala pansi pakuvala kwamphamvu kwa abrasive, motero nthawi zambiri amagwiritsidwa ntchito m'magawo osamva amigodi, zida zomangira, mphamvu zotentha, ndi zida zina zamakina. Pansi pazikhalidwe zotsika kwambiri, chitsulo chachikulu cha manganese sichingakhale ndi mawonekedwe azinthuzo chifukwa chowumitsa ntchito sichikuwonekera.

Mapangidwe a Chemical

Dzina	Mapangidwe a Chemical (%)
Dzina	C	Si	Mn	Cr	Mo	Ku	P	S
Mn14 Mill Liner	0.9-1.5	0.3-1.0	11-14	0-2.5	0-0.5	≤0.05	≤0.06	≤0.06
Mn18 Mill Liner	1.0-1.5	0.3-1.0	16-19	0-2.5	0-0.5	≤0.05	≤0.06	≤0.06

Zimango katundu ndi kapangidwe metallographic

Dzina	Kuuma Pamwamba (HB)	Mtengo wa Ak (J/cm2)	Microstructure
Mn14 Mill Liner	≤240	≥100	A+C
Mn18 Mill Liner	≤260	≥150	A+C
C -Carbide \| Carbide A-yosungidwa austenite \| Austenite

Mafotokozedwe azinthu

Kukula	Hole Dia. (mm)		Kutalika kwa Liner (mm)
Kukula	≤40	≥40	≤250	≥250
Kulekerera	+ 0	+ 30 0	+	+ 30

Chrome Alloy Steel

Chromium aloyi kuponyedwa chitsulo ogaŵikana mkulu chromium aloyi kuponyedwa chitsulo (chromium zili 8-26% mpweya zili 2.0-3.6%), sing'anga chromium aloyi kuponyedwa chitsulo (chromium zili 4-6%, mpweya zili 2.0-3.2%), otsika chromium Mitundu itatu ya aloyi kuponyedwa chitsulo (chromium zili 1-3%, carbon zili 2.1-3.6%). Chochititsa chidwi ndi chakuti microhardness ya M7C3 eutectic carbide ndi HV1300-1800, yomwe imagawidwa mu mawonekedwe a maukonde osweka ndi olekanitsidwa pa martensite (yovuta kwambiri muzitsulo zachitsulo) masanjidwewo, kuchepetsa zotsatira za cleavage pa masanjidwewo. Chifukwa chake, cholumikizira chapamwamba cha chromium chimakhala ndi mphamvu zambiri, kulimba kwa mphero ya mpira, komanso kukana kuvala kwapamwamba, ndipo magwiridwe ake amayimira kuchuluka kwazinthu zomwe zitsulo sizimva kuvala.

Mapangidwe a Chemical

Dzina	Mapangidwe a Chemical (%)
Dzina	C	Si	Mn	Cr	Mo	Ku	P	S
High Chrome Alloy Liner	2.0-3.6	0-1.0	0-2.0	8-26	≤3.0	≤1.2	≤0.06	≤0.06
Middle Chrome Alloy Liner	2.0-3.3	0-1.2	0-2.0	4-8	≤3.0	≤1.2	≤0.06	≤0.06
Low Chrome Alloy Liner	2.1-3.6	0-1.5	0-2.0	1-3	0-1.0	≤1.2	≤0.06	≤0.06

Zimango katundu ndi kapangidwe metallographic

Dzina	Pamwamba (HRC) Ak (J/cm2)				Microstructure
High Chrome Alloy Liner		≥58		≥3.5		M+C+A
Middle Chrome Alloy Liner		≥48		≥10		M+C
Low Chrome Alloy Liner		≥45		≥15		M+C+P
M-Martensite	C-Carbide		A-Austenite		P-Pearlite

Mafotokozedwe azinthu

Kukula	Hole Dia. (mm) Kutalika kwa Liner (mm)
Kukula	≤40	≥40	≤250	≥250
Kulekerera	+ 0	+ 30 0	+	+ 30

Cr-Mo Aloyi Chitsulo

Qiming Machinery amagwiritsa ntchito Cr-Mo alloy chitsulo kuponya mphero. Zinthuzi kutengera muyeso waku Australia, (AS2074 Standard L2B, ndi AS2074 Standard L2C) zimapatsa mphamvu komanso kukana kuvala pamapulogalamu onse opangira ma semi-autogenous mphero.

Mapangidwe a Chemical

Kodi	Chemical Elements (%)
Kodi	C	Si	Mn	Cr	Mo	Ku	P	S
L2B	0.6-0.9	0.4-0.7	0.6-1.0	1.8-2.1	0.2-0.4	0.3-0.5	≤0.04	≤0.06
L2C	0.3-0.45	0.4-0.7	1.3-1.6	2.5-3.2	0.6-0.8	0.3-0.5	≤0.04	≤0.06

Physical Property & Microstructure

Kodi	Kuuma (HB)	Ak (J/cm2)	Microstructure
L2B	325-375	≥50	P
L2C	350-400	≥75	M
M-Martensite, C-Carbide, A-Austenite, P-Pearlite

Ni-hard Steel

Ni-Hard ndi chitsulo choyera choyera, chosakanikirana ndi faifi tambala ndi chromium yoyenera kutsika pang'ono, ma abrasion otsetsereka pazonse zonyowa komanso zowuma. Ni-Hard ndi chinthu chosamva kuvala kwambiri, chopangidwa m'mawonekedwe ndi mawonekedwe omwe ndi abwino kuti agwiritsidwe ntchito pamapangidwe abrasive ndi kuvala ndi kugwiritsa ntchito.

Mapangidwe a Chemical

Dzina	C	Si	Mn	Ndi	Cr	S	P	Mo	Kuuma
Ni-Hard AS2027 Gr Ni Cr 1-550	3.2-3.6	0.3-0.8	0.2-0.8	3.0-5.0	1.5-3.0	≤0.12	≤0.15	≤0.5	550-600HBN
Ni-Hard AS2027 Gr Ni Cr 2-550	2.8-3.2	0.3-0.8	0.2-0.8	3.0-5.0	1.5-3.0	≤0.12	≤0.15	≤0.5	500-550HBN
Ni-Hard AS2027 Gr Ni Cr 2-550	3.2-3.6	1.5-2.2	0.2-0.8	4.0-5.5	8.0-10.0	≤0.12	≤0.15	≤0.5	630-670HBN

Chitsulo Choyera

White iron liner ikulimbikitsidwa kuti igwiritsidwe ntchito mopanda mphamvu kwambiri monga:

1. Lamba wonyamulira cholumikizira chamakampani a Migodi.

2. Chigayo cha mpira wa simenti.

3. Chemical makampani mpira mphero.

Mapangidwe a Chemical

Dzina	Mapangidwe a Chemical (%)
Dzina	C	Si	Mn	Cr	Mo	Ku	P	S
White Iron Steel Liner	2.0-3.3	0-0.8	≤2.0	12-26	≤3.0	≤1.2	≤0.06	≤0.06

Physical Property & Microstructure

Dzina	Mtengo wa HRC	Ak(J/cm2)	Microstructure
White Iron Steel Liner	≥58	≥3.5	M+C+A
M-Martensite C-Carbide A-Austenite

@Nick Sun [email protected]

Nthawi yotumiza: Jul-10-2020