Barrick inowedzera gakava nePNG pamusoro pemugodhi wePorgera

Kanadha Barrick Gold (TSX: ABX) (NYSE: GOLD) yakapa  chiziviso chekukakavadzana kuhurumende yePapua New Guinea  (PNG) pamusoro pekuramba kwenyika kuvandudza rezinesi rePorgera mine.

Wechipiri pakukura mugadziri wegoridhe pasi rose anoti danho rePNG  rekuramba chikumbiro  chekuwedzera kwekurenda kwakatyora chibvumirano chekudyara mari pakati penyika neAustralia, pamwe nemutemo wepasi rose unodzora mari yekunze.

Kana mapato akatadza kugadzirisa gakava kuburikidza nenhaurirano, Barrick anoronga kuendesa PNG kumatongerwo enyika.

"Zvinoshatirisa kuti Barrick iri kutsvaga kudyidzana nedzimwe nyika kuburikidza nevatsigiri vayo pamberi pedare rePNG ratotonga nyaya iyi," Catherine Coumans, weMiningWatch Canada, akadaro mukutaura. 

“Mugodhi uyu mumwe wemienzaniso yakaipisisa yandinoziva pakucherwa kwezvicherwa zvisina basa,” vakawedzera.

Barrick nemumwe wavo wekuChina, Zijin Mining,  vakambomira kushanda  pamugodhi muEnga Province mukupera kwaKubvumbi. Danho iri rakatevera kuramba kweMutungamiriri wenyika, VaJames Marape, kumutsiridza mvumo yePorgera zvichibva mukunetsa  kwezvakatipoteredza nemagariro.

Mucheri wemugodhi weToronto akaona kurambwa kwakadaro kwakaziviswa pachena pasina kuzivisa maneja wemugodhi, Barrick Niugini Limited, kana kutevera hurongwa hwakakodzera.

Muna Chivabvu, hofori yegoridhe yakapa imwe chikamu chegumi neshanu muzana pamugodhi wePorgera kune varidzi venzvimbo iyi, mukuyedza kuputsa gakava nehurumende pamusoro peramangwana remugodhi.

PNG yakazotyisidzira Barrick nemhosva, ichiti mubatanidzwa wekambani iyi munyika wanga uchironga kutengesa kunze kwenyika madhora mamiriyoni gumi nematatu egoridhe nesirivha kuAustralia. BNL yakaramba zvaipomerwa.

Kupokana kuri kuitika kwaita kuBarrick izvo zvisina kubatwa nedenda - kumisa zvaitarisirwa gore. Iko  zvino inotarisira kuburitsa pakati pe4.6 miriyoni ne5 miriyoni maunzi egoridhe  gore rino - mazana maviri emaonzi akaderera pane yaakambofungidzira.

Barrick yakaratidza panguva iyoyo kuti PNG yaikumbirawo kambani neZijin kuti  vabhadhare $191-miriyoni mumitero yekumashure, kubva mukuongororwa kwemitero kwakaitwa pakati pa2006 na2015.

Tier one zvinogoneka

Mutungamiriri weBarrick uye mukuru mukuru, Mark Bristow, akataura muna Kurume kuti  Porgera aive ne "tier one mukana"  asi akatarisana nematambudziko mazhinji se "nyaya dzenhaka uye nharaunda isingadzoreki."

Mugodhi wegoridhe, uri munharaunda yePNG yekuchamhembe kwenzvimbo dzakakwirira, mubatanidzwa pakati peBarrick neZijin Mining. Mumwe nemumwe ane chikamu che47.5% chemugodhi uyu, 5% yasara ichibatwa neboka revaridzi veminda Mineral Resources Enga.

Porgera inobatsira kune inenge gumi muzana yezvinhu zvinotengeswa kunze kwenyika uye inoshandisa pamusoro pe3,300 Papua New Guinea zvizvarwa.

Gomba rakavhurika uye mugodhi wegoridhe wepasi pevhu unogara pakakwirira 2,200-2,600 metres mudunhu reEnga, uye inenge 600 km (370 mamaira) kuchamhembe kwakadziva kumadokero kwePort Moresby.

Mamwe makambani emigodhi anoshanda muPNG, kusanganisira Newcrest yeAustralia (ASX: NCM), haana kukanganiswa nesarudzo ine chekuita nePorgera. Mucheri "akagamuchira" rutsigiro  rweMutungamiriri weWafi Golpu goridhe nemhangura asset , achiwedzera kuti kurojesa kwayo migodhi kumabasa eLihir kunoramba kuri muchimiro chakanaka nekuvandudzwa kusingade kusvika 2035.

Hunhu uye Maitiro eChromium Alloy Steel Mill liner

High chromium alloy cast iron kazhinji inoreva alloy white cast iron ine chromium inosvika 12% - 30% uye kabhoni inosvika 2.4% - 3.6%. Iyo inoratidzirwa neiyo microhardness hv1300 ~ 1800 yeM7C3 eutectic carbide, iyo yakaparadzirwa pane matrix yemartensite (yakanyanya kuomesesa chimiro musimbi matrix) muchimiro chetambo yakaputsika uye yakasarudzika chimiro, iyo inoderedza kupatsanura mhedzisiro pamatrix. . Naizvozvo, iyo yakakwira chromium alloy liner ine simba rakanyanya, kusimba, uye yakakwirira kupfeka kuramba, uye kuita kwayo kunomiririra nhanho yepamusoro yesimbi isingapfekere zvinhu. Yakave ichishandiswa zvakanyanya mumakuru-makuru simende mabhora ezvigayo kunze kwenyika. Hupenyu hwesevhisi hwebhini rekutanga makore 6-8, uye iyo yechipiri neyechitatu bhini inopfuura makore gumi nemaviri.

Muchishandiso chinoshanda, yakaderera kabhoni yakakwira chromium simbi (simbi) lining plate inowanzo shandiswa kune iyo mamiriro ekushanda ane hombe kukanganisa mutoro, uye yakakwira kabhoni uye yakakwira chromium cast iron lining plate inoshandiswa pakushanda mamiriro ane diki mhedzisiro mutoro, kuitira kuti kupa kutamba kwakazara kune kusakara kwekupokana kwezvinhu. Semuenzaniso, Cr15 liner ine 2.4% ～ 2.65% C inogona kushandiswa pazvigayo pasi pe4.2m (bhini rimwe); Cr20 neCr26 liner dzine 2.65% ～ 2.85% C inogona kushandiswa kuzvigayo pamusoro pe4.2m; kana paine pre pulverizing system isati yakuya, senge "roller press + simende mill", avhareji yebhora dhayamita iri pasi pe60mm, uye C yemukati inogona kunge yakakwira, inogona kuvimbisa hupenyu hwesevhisi (bhini rimwe) re8-10. makore, uye hupenyu hwebasa hwebin 2 ne3 hwakareba. Iyo yekukuya musoro ndiro inogona kugadzirwa yepakati (yakaderera) carbon high chromium cast iron; iyo yekuburitsa grate ndiro inogona kugadzirwa yepakati uye yakakwirira kabhoni yakakwira chromium cast iron; iyo partition board inoumbwa nemabhuraki inogona kugadzirwa ne low carbon high chromium cast iron.

Kushanda kunoshanda

Iwo chromium alloy simbi mill liners anogadzirwa neQiming Machinery anosanganisira Cr13, Cr15, Cr20, uye Cr26, ayo anoshandiswa kune anopfuura mazana maviri seti emabhora ezvigayo ane akasiyana madhizaini uye mhando dze ø1.83M, ø2.2M, ø3M, ø3.5m , ø3.8m, ø4.2m, ø5M, uye ø5.4m. Semuenzaniso, The Cr15 mill liner yakashandiswa mubhini rekutanga re ø2.2m × 6.5m mill muYanshi simende kwemakore gumi nematatu; Iyo Cr15 mill liner yakashandiswa mubhini rekutanga re ø 3m×9m mill muShunbao Cement kwemakore manomwe; Muna Chivabvu 2020, maCr26 mill liner uye ndiro yekukuya musoro inoshandiswa pa ø5.4m × 15.5m super hombe chigayo cheDayu simende (Shandong) Co., Ltd. yanga ichimhanya kwemakore anopfuura matanhatu. Maererano nemushumo wemutengi, hupenyu hwebasa rekukuya ndiro yakapfuura 2 nguva yepakutanga yakatorwa kunze kwekukuya ndiro yemusoro, uye inotarisirwa kushandiswa kweanenge makore maviri.

Chromium alloy simbi mill liners kukanda kugadzirwa

Kuvandudza kukanganisa kuoma kweyakakwira chromium alloy simbi mill liner

Paunenge uchisarudza yakakwira chromium yakakandwa simbi zvinhu kugadzirira mill liner, bhizinesi rekugadzira rinofanirwa kupa pamberi pakuramba kwayo kupfeka, panguva imwecheteyo, inofanirwa kutarisisa zvakanyanya kusanganiswa kwesimba uye kuoma. Chete kana iyo organic inofananidzwa yekusimba kwepamusoro, kusimba kwakasimba, uye yakakwirira kupfeka kuramba ndiko kunogona kuita kwakanakisa kwepamusoro chromium cast iron kuunzwa mukutamba kwakazara.

Kuti uvandudze zvimiro zveyakakwira chromium cast iron, iyo yekutyoka kusimba kweKIC kukosha kweyakakwira chromium cast iron inofanirwa kutanga yawedzerwa. Kana CR> 13%, M7C3 eutectic carbides yepamusoro chromium cast iron inogona kuputswa uye kuparadzaniswa. Kana iyo eutectic carbides ikaramba isina kuchinjwa uye chiyero cheCR / C chiri pakati pe6.6 ne7.1, iyo yekuputsika kusimba kweKIC kukosha kweyakakwira chromium cast iron ndiyo yakakwira, kureva kuti, kuputika kwekuparadzira kuramba ndiko kwakasimba. Mhedzisiro yacho inoratidza kuti morphology, kugovera, uye saizi yeM7C3 eutectic carbides inogona kuvandudzwa nekupisa-kupisa kudzima kana kuwedzera nguva yekubata,

Wedzera kuoma. Iyo iri nyore uye ine hupfumi nzira yekushandura morphology, huwandu, ukuru uye kugoverwa kweeutectic carbides mune yakakwira chromium iron iron uye kuvandudza simba rayo uye kuoma ndiko kushandura simbi yakanyungudutswa, kudzora kusimba kwayo, uye zvakanyanya kukosha, kunatsa iyo eutectic carbide, kuderedza. kupatsanura kwayo matrix, kunatsa matrix uye kugadzirisa kuoma.

Kushandiswa kwakachengeteka kweakakwira chromium alloy simbi mill liners

• Kutyoka ndiyo huru yekutadza modhi yeyakakwira chromium alloy liner. Zvikonzero zvikuru zvekutyoka kukanda kuremara, sekukanda porosity, shrinkage cavity, porosity, kuisirwa, nezvimwe.
• High chromium alloy simbi mill liner inofanirwa kunge iri diki uye gobvu, imwe bhoti gomba, kana isina bhoti gomba. Hazvibvumirwi kushandisa hombe uye yakaonda kana kaviri bolt gomba lining plate.
• Panguva yekuiswa kwepamusoro chromium lining plate, ndiro yekugadzira ine mabhoti ebhoti inofanira kusimbiswa zvakasimba nemabhoti. Nzvimbo yekuisa uye cylinder pamusoro inofanira kunge yakabatana. Zviri nani kusarudza rubber cushion semutsara. Izvo zvinorambidzwa zvachose kuisa uye kushandisa yakakwira chromium liner pasina chero yekurara. Munguva yekutanga (Kuedza) kushanda mushure mekuiswa, guyo rinofanira kuzadzwa nehumwe huwandu hwezvinhu zvisati zvaitika. Zvinorambidzwa zvachose kumhanyisa chigayo pasina mutoro.

@Nick Sun     [email protected]