Iamgold wuxuu hakiyay hawlihii Suriname iyada oo ay jiraan kiisaska covid-19
Macdanta dahabka ee Canadian Iamgold Talaadadii ayaa joojisay howlihii ka socday macdanteeda dahabka ee Rosebel ee Suriname iyadoo ururka shaqaaluhu uu soo saaray amar shaqo joojin ka dib markii toddobo shaqaale ah laga helay cudurka 'coronavirus' cusub.
Shirkaddu waxay sheegtay in shaqaalaha uu cudurkani ku dhacay la karantiilay ayna qaadayso tillaabooyin lagu jeermiyo goobta ay ku nool yihiin shaqaalaha iyo goobaha shaqada, laakiin ururku wuxuu adeegsaday mid ka mid ah tallaabooyinkeeda ka hortagga ah oo saldhig u ah joojinta shaqada.
"Sababtoo ah iska caabinta Ururka ee hirgelinta tillaabooyinka xakamaynta covid-19, waxaan joojineynaa hawlgallada ilaa kontaroolada ku habboon laga helayo si loo ilaaliyo badbaadada dhammaan shaqaalaha," ayay shirkaddu ku tiri hadal ay soo saartay.
Macdanta adduunka ayaa si ku meel gaar ah u hakiyay wax soo saarkooda qaar ka mid ah macdantooda sababo la xiriira cudurka safmarka ah ee COVID-19 iyo xannibaadaha ay dowladdu soo rogtay si loo xakameeyo fiditaanka fayraska.
Iamgold waxay sheegtay inay hirgalisay shuruuc kala fogaansho bulsheed, tillaabooyin fayadhowr ayna hoos u dhigtay shaqaalaheeda goobta miinada ka dib markii uu dillaacay.
Afhayeenka ururka Otmar Biswane ayaa u sheegay idaacad maxalli ah Talaadadii talaabooyinka badbaadada kuma filna.
"Ma ahan in aysan jirin wax shuruudo ah gabi ahaanba, laakiin alaabadu ma ahan kuwa aad ku qaadi karto dad badan oo ku jira hal xero oo kaliya oo aad rabto inaad 100% wax soo saar si sax ah u maamusho masiibadaas," ayuu yidhi.
Macdanta Rosebel ee dahabka laga qodo waxaa inteeda badan iska leh ninka Canada u dhashay, halka dowladda Koonfurta Ameerika ay leedahay saami dhan 5%.
Kubadda Mill Liner Xulashada Qalabka
Waxyaabaha kala duwan ee la jajabiyey, xaaladaha shaqada ee kala duwan waxay u baahan yihiin qalabyo kala duwan oo ku habboon. Sidoo kale, qaybta wax lagu shiido ee aan qallafsanayn iyo qaybta wax lagu shiido waxay u baahan tahay qalabyo kala duwan.
H&G ayaa bixiya agabka soo socda si aad u tuurto makiinadaada kubbadda:
Birta Manganese
Maaddada manganese ee saxanka sare ee birta birta manganese ee saxanka dahaarka guud ahaan waa 11-14%, kaarboonku guud ahaan waa 0.90-1.50%, kuwaas oo intooda badan ka sarreeya 1.0%. Markay tahay culayska saamaynta hooseeya, engegnaanta waxay gaari kartaa HB300-400. Marka culeyska sareeyo, engegnaanta waxay gaari kartaa HB500-800. Iyadoo ku xiran culeyska saameynta, qoto dheer ee lakabka adag wuxuu gaari karaa 10-20mm. Lakabka qallafsan ee leh qallafsanaanta sare waxay iska caabin kartaa saameynta waxayna yareyn kartaa dharbaaxada. Birta manganese-ka sare waxay leedahay wax qabad heer sare ah oo ka-hortagga xirashada iyadoo la raacayo xaaladda saameyn xooggan oo daal ah, sidaas darteed waxaa badanaa loo isticmaalaa qaybaha xirashada u adkaysta ee macdanta, qalabka dhismaha, awoodda kulaylka, iyo qalabka kale ee farsamada. Marka la eego shuruudaha xaaladaha saameynta hooseeya, birta manganese sare ma sameyn karto sifooyinka walxaha sababtoo ah saameynta adkeynta shaqadu maaha mid cad.
Halabuurka Kiimikada
Magaca | Halabuurka Kiimikada (%) | |||||||
C | Si | Mn | Cr | Mo | Cu | 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 |
Guryaha makaanikada iyo qaab-dhismeedka biraha
Magaca | Hardness Dusha sare (HB) | Qiimaha Saamaynta Ak (J/cm2) | Qaab-dhismeedka yar yar |
Mn14 Mill Liner | ≤240 | ≥100 | A+C |
Mn18 Mill Liner | ≤260 | ≥150 | A+C |
C -Carbide | Carbide A-ustenite la hayo | Austenite |
Tilmaamaha alaabta
Cabbirka | Hole Dia (mm) | Dhererka xadhkaha (mm) | ||
≤40 | ≥40 | ≤250 | ≥250 | |
Dulqaad | +20 | +30 | +20 | +30 |
Birta Daawaha ee Chrome
Birta daawaha ee Chromium waxa loo qaybiyaa birta chromium aluminium sare ah (koox ka kooban 8-26% kaarboon ka kooban 2.0-3.6%), birta daawaha chromium dhexdhexaad ah ( content chromium 4-6%, content carbon 2.0-3.2%), hoose Saddex nooc oo ah birta dabaysha (ka kooban chromium 1-3%, kaarboonka 2.1-3.6%). Muuqaalkeeda cajiibka ah ayaa ah in microhardness ee M7C3 eutectic carbide uu yahay HV1300-1800, kaas oo loo qaybiyo qaab shabakad jaban oo go'doonsan martensite (qaabka ugu adag ee shaxanka birta) matrix, yaraynta saameynta dillaaca ee matrixka. Sidaa darteed, xargaha daawaynta sare ee chromium-ka ayaa leh awood sare, adkaanta kubbadda, iyo caabbinta sare ee dharka, iyo waxqabadkeedu wuxuu ka dhigan yahay heerka ugu sarreeya ee qalabka birta u adkaysta ee hadda jira.
Halabuurka Kiimikada
Magaca | Halabuurka Kiimikada (%) | |||||||
C | Si | Mn | Cr | Mo | Cu | P | S | |
Khadka Sare ee Aloyiga Chrome | 2.0-3.6 | 0-1.0 | 0-2.0 | 8-26 | ≤3.0 | ≤1.2 | ≤0.06 | ≤0.06 |
Dhexdhexaadiyaha Alloy Chrome | 2.0-3.3 | 0-1.2 | 0-2.0 | 4-8 | ≤3.0 | ≤1.2 | ≤0.06 | ≤0.06 |
Xadhkaha Dabeecadda Aloyiga ee Chrome Low | 2.1-3.6 | 0-1.5 | 0-2.0 | 1-3 | 0-1.0 | ≤1.2 | ≤0.06 | ≤0.06 |
Guryaha makaanikada iyo qaab-dhismeedka biraha
Magaca | Dusha sare (HRC) Ak (J/cm2) | Qaab-dhismeedka yar yar | ||||
Khadka Sare ee Aloyiga Chrome | ≥58 | ≥3.5 | M+C+A | |||
Dhexdhexaadiyaha Alloy Chrome | ≥48 | ≥10 | M+C | |||
Xadhkaha Dabeecadda Aloyiga ee Chrome Low | ≥45 | ≥15 | M+C+P | |||
M- Martensite | C - Carbide | A-Austenite | P-Pearlite |
Tilmaamaha alaabta
Cabbirka | Hole Dia. (mm) Dhererka xadhkaha (mm) | |||
≤40 | ≥40 | ≤250 | ≥250 | |
Dulqaad | +20 | +30 | +20 | +30 |
Cr-Mo Alloy Steel
Mashiinnada H&G waxay adeegsadaan birta daawaynta ee Cr-Mo si ay u tuuraan makiinada wax-shiidka. Walaxdan oo ku salaysan heerka Australia, (AS2074 Standard L2B, iyo AS2074 Standard L2C) waxa ay bixisa saamayn heersare ah oo ay xidhato iska caabin dhammaan codsiyada wax-shiidka ee semi-autogenous.
Halabuurka Kiimikada
Koodhka | Walxaha Kiimikada (%) | |||||||
C | Si | Mn | Cr | Mo | Cu | 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 |
Hantida Jirka & Dhismayaasha yar yar
Koodhka | Hardness (HB) | Ak (J/cm2) | Qaab-dhismeedka yar yar |
L2B | 325-375 | ≥50 | P |
L2C | 350-400 | ≥75 | M |
M-Martensite, C-Carbide, A-Austenite, P-Pearlite |
Ni-hard Steel
Ni-Hard waa bir shub ah oo cad, oo lagu daray nikkel iyo chromium oo ku habboon saamaynta hoose, naaxinta simbiriirixan ee codsiyada qoyan iyo kuwa qalalan. Ni-Hard waa shay aad u adkaysi badan, oo lagu shubay foomamka iyo qaababka kuwaas oo ku habboon in loo isticmaalo meelaha xoqan iyo xidhashada jawiga iyo codsiyada.
Halabuurka Kiimikada
Magaca | C | Si | Mn | Ni | Cr | S | P | Mo | Adag |
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 |
Birta Cad ee Birta
Halabuurka Kiimikada
Magaca | Halabuurka Kiimikada (%) | |||||||
C | Si | Mn | Cr | Mo | Cu | P | S | |
Xadhkaha Birta Cad ee Birta | 2.0-3.3 | 0-0.8 | ≤2.0 | 12-26 | ≤3.0 | ≤1.2 | ≤0.06 | ≤0.06 |
Hantida Jirka & Dhismayaasha yar yar
Magaca | HRC | Ak (J/cm2) | Qaab-dhismeedka yar yar |
Xadhkaha Birta Cad ee Birta | ≥58 | ≥3.5 | M+C+A |
M-Martensite C- Carbide A-Austenite |
Haddii aad hayso su'aal gaar ah, fadlan la xidhiidh injineerkayaga si uu kuugu adeego!
Nick Sun [email protected]
Waqtiga boostada: Juun-19-2020