Barrick kpalitere esemokwu ya na PNG maka ogbunigwe Porgera

Barrick Gold nke Canada (TSX: ABX) (NYSE: GOLD) enyela  gọọmentị Papua New Guinea (PNG) ọkwa esemokwu maka  ọjụjụ mba ahụ jụrụ imegharị akwụkwọ ikike maka ogbunigwe Porgera.

Onye na-emepụta ọla edo nke abụọ n'ụwa na-arụ ụka na  mkpebi PNG ịjụ ngwa  maka ịgbatị ụlọ ahụ mebiri nkwekọrịta itinye ego n'etiti obodo na Australia, yana iwu mba ụwa na-achịkwa itinye ego na mba ọzọ.

Ọ bụrụ na ndị otu enweghị ike idozi esemokwu ahụ site na mkparịta ụka, Barrick na-ezube iwere PNG na ikpe ikpe mba ụwa.

"Ọ bụ ihe jọgburu onwe ya na Barrick na-achọ ikpe ikpe mba ụwa site n'aka ndị enyemaka ya n'ihu ụlọ ikpe PNG ekpebidịla ikpe ahụ," Catherine Coumans, nke MiningWatch Canada, kwuru na nkwupụta. 

Ọ gbakwụnyere, "Ogwugwu ogbunigwe bụ otu n'ime ihe atụ kacha njọ nke igwu egwu enweghị ọrụ m maara."

Barrick na onye China ibe ya, Zijin Mining,  kwụsịrị ọrụ nwa oge  na ebe a na-egwuputa ihe na Enga Province na ngwụcha Eprel. Ntugharị a sochiri Prime Minister James Marape jụrụ imeghari ikike Porgera dabere na  nsogbu gburugburu ebe obibi na ọha mmadụ.

Onye na-egwuputa ihe na Toronto kwuru na a mara ọkwa njụta ​​dị otú ahụ n'ihu ọha na-agwaghị onye njikwa ogbunigwe, Barrick Niugini Limited, ma ọ bụ soro usoro kwesịrị ekwesị.

N'ọnwa Mee, nnukwu ọla edo nyere ndị nwe ala mpaghara ihe 15% ọzọ na ogbunigwe Porgera, na mbọ ọhụrụ iji mebie esemokwu ya na gọọmentị maka ọdịnihu nke ogbunigwe ahụ.

PNG mechara yie Barrick egwu maka ikpe mpụ, na-ekwu na njikọ aka ụlọ ọrụ na mba ahụ na-eme atụmatụ ibupụ ọla edo na ọlaọcha $13 nde na Australia n'ụzọ iwu na-akwadoghị. BNL gọnarịrị ebubo ahụ.

Esemokwu a na-aga n'ihu emeela Barrick ihe ọrịa ọjọọ a na-emeghị - mebie mmepụta ọ tụrụ anya ya maka afọ. Ọ  na-atụ anya iwepụta n'etiti nde 4.6 na 5 nde ounce nke ọla edo  n'afọ a - ounce 200,000 dị ala karịa atụmatụ ya gara aga.

Barrick kpughere n'oge ahụ na PNG na-arịọkwa ụlọ ọrụ ahụ na Zijin ka ha  kwụọ $ 191 nde na ụtụ azụ azụ , sitere na nyocha ụtụ isi emere n'etiti 2006 na 2015.

Agba nke mbụ nwere ike

Onye isi oche Barrick na onye isi nchịkwa, Mark Bristow, kwuru na March na  Porgera nwere "ikike nke mbụ"  mana chere ọtụtụ ihe ịma aka ihu n'ụdị "okwu nketa na agbata obi na-adịghị mma."

Ebe a na-egwupụta ọla edo, nke dị na mpaghara ugwu ugwu PNG, bụ njikọ aka n'etiti Barrick na Zijin Mining. Onye ọ bụla nwere 47.5% nke ogbunigwe ahụ, ebe 5% fọdụrụnụ bụ ndị nwe ala Mineral Resources Enga.

Porgera na-enye aka na ihe dị ka 10% nke mbupụ mba ahụ ma na-ewe ihe karịrị ụmụ amaala Papua New Guinea 3,300.

Oghere oghere na oghere ọla edo dị n'okpuru ala na-anọdụ na elu 2,200-2,600 mita na mpaghara Enga, ma dị ihe dị ka kilomita 600 (kilomita 370) n'ebe ugwu ọdịda anyanwụ nke Port Moresby.

Ụlọ ọrụ ndị ọzọ na-egwupụta akụ na-arụ ọrụ na PNG, gụnyere Australia's Newcrest (ASX: NCM), emetụtaghị mkpebi ahụ gbasara Porgera. Onye na-egwuputa ihe anabatala nkwado nke Prime Minister maka  ọla ọla edo ya na ọla kọpa Wafi Golpu , na-agbakwunye na mgbazinye Ngwuputa Ngwuputa pụrụ iche na ọrụ Lihir ka nọ n'ọnọdụ dị mma yana mmeghari ọhụrụ adịghị mkpa ruo 2035.

Njirimara na ụkpụrụ nke Chromium Alloy Steel Mill liners

Igwe ihe nkedo chromium dị elu na-ezo aka na nkedo na-acha ọcha alloy nwere ọdịnaya chromium nke 12% - 30% yana ọdịnaya carbon nke 2.4% - 3.6%. A na-eji microhardness hv1300 ~ 1800 nke M7C3 eutectic carbide, nke a na-agbasa na matrix nke martensite (ihe owuwu kachasị sie ike na metal matrix) n'ụdị netwọk gbajiri agbaji na ọdịdị dịpụrụ adịpụ, nke na-ebelata mmetụta nkewa na matriks. . Ya mere, akwa chromium alloy liner nwere ike dị elu, ike siri ike, na nkwụsi ike dị elu, na arụmọrụ ya na-anọchite anya ọkwa kachasị elu nke ihe ndị na-eguzogide ígwè. A na-eji ya eme ihe n'ọtụtụ ebe a na-egwupụta bọọlụ simenti na mba ọzọ. Ndụ ọrụ nke biini mbụ bụ afọ 6-8, na nke nke abụọ na nke atọ karịa afọ 12.

N'ime ngwa bara uru, a na-ejikarị obere ihe mkpuchi carbon carbon high chromium chromium cast iron (steel) lining plate na-ejikarị eme ihe maka ọnọdụ ọrụ na nnukwu mmetụta dị ukwuu, na nnukwu carbon na chromium nkedo ígwè dị elu na-eji maka ọnọdụ ọrụ na obere mmetụta mmetụta, ka nye egwuregwu zuru oke na-eyi nguzogide ihe. Dịka ọmụmaatụ, enwere ike iji Cr15 liner nwere 2.4% ~ 2.65% C maka igwe igwe n'okpuru 4.2m (otu bin); Cr20 na Cr26 liners nwere 2.65% ~ 2.85% C nwere ike iji igwe igwe ihe karịrị 4.2m; Mgbe enwere sistemu pulverizing tupu egweri, dị ka “roller press + ciment Mill”, nkezi bọọlụ erughị 60mm, ọdịnaya C nwere ike ịdị elu, nke nwere ike ikwe nkwa ndụ ọrụ (otu bin) nke 8-10. afọ, na ndụ ọrụ nke bin 2 na 3 dị ogologo. Enwere ike ịme efere isi ihe na-egweri nke ọkara (ala) carbon high chromium cast iron; Enwere ike ịme efere grate na-agbapụta nke ọkara na elu carbon elu chromium nkedo ígwè; na nkebi osisi mejupụtara blocks nwere ike mere nke obere carbon elu chromium nkedo ígwè.

Ngwa bara uru

Igwe igwe igwe ihe igwe chromium alloy nke Qiming Machinery mepụtara gụnyere Cr13, Cr15, Cr20, na Cr26, nke a na-eji ihe karịrị narị igwe igwe bọọlụ 200 nwere nkọwa dị iche iche na ụdị ø1.83M, ø2.2M, ø3M, ø3.5m. , ø3.8m, ø4.2m, ø5M, na ø5.4m. Dịka ọmụmaatụ, ejirila Cr15 Mill liner mee ihe n'ime ụlọ mbụ nke ø2.2m × 6.5m na ciment Yanshi maka afọ 13; Ejila igwe igwe Cr15 mee ihe na nke mbụ nke ø 3m × 9m igwe ihe na Shunbao Cement maka afọ 7; Na Mee 2020, igwe igwe igwe Cr26 na efere isi na-egweri na ø5.4m × 15.5m super nnukwu igwe nke Dayu ciment (Shandong) Co., Ltd na-aga n'ihu kemgbe ihe karịrị afọ 6. Dị ka akụkọ nke ndị ahịa si kwuo, ndụ ọrụ nke efere isi ihe na-egweri agafewo ugboro abụọ nke mbụ e ji egweri isi efere, na-atụ anya na a ga-eji ya ihe dị ka afọ 2.

Chromium alloy ígwè igwe ihe linersnkedo mmepụta

Imelite mmetụta siri ike nke igwe igwe ihe igwe chromium dị elu

Mgbe ị na-ahọrọ ihe nkedo chromium dị elu iji kwadebe ihe igwe igwe, ụlọ ọrụ mmepụta ihe kwesịrị ibute nkwụsi ike nke uwe ya, n'otu oge ahụ, ọ kwesịkwara itinye uche pụrụ iche na nchikota nke ike na ike. Naanị mgbe nkwekọ organic nke ike dị elu, ike siri ike, na nkwụsi ike dị elu nwere ike iweta ọmarịcha arụmọrụ nke igwe nkedo chromium dị elu ka ewebata n'ime egwuregwu zuru oke.

Iji kwalite njirimara nke ihe nkedo chromium dị elu, mgbaji siri ike KIC uru nke ihe nkedo chromium dị elu kwesịrị ibu ụzọ mụbaa. Mgbe CR> 13%, M7C3 eutectic carbides nke igwe nkedo chromium dị elu nwere ike ịgbaji wee kewapụ ya. Mgbe eutectic carbides na-anọgide na-agbanweghi agbanwe na CR / C ratio dị n'etiti 6.6 na 7.1, mgbaji siri ike KIC uru nke elu chromium nkedo ígwè bụ nke kasị elu, ya bụ, mgbape propagation na-eguzogide bụ ike. Nsonaazụ gosiri na morphology, nkesa, na nha nke M7C3 eutectic carbides nwere ike imeziwanye ya site na imenyụ ọkụ dị elu ma ọ bụ ịgbatị oge njide,

Mee ka ike sie ike. Ụzọ kachasị mfe na nke akụ na ụba iji gbanwee morphology, ọnụ ọgụgụ, nha na nkesa nke eutectic carbides na nnukwu chromium nkedo ígwè ma melite ike ya na ike ya bụ imezi ígwè a wụrụ awụ, na-achịkwa ihe siri ike ya, na nke ka mkpa, nụchaa eutectic carbide, belata. mmetụta nkewa ya na matrik, nụchaa matriks ma melite ike.

Eji akwa chromium alloy ígwè igwe ihe liners

• Ọkpụkpụ bụ isi ọdịda mode nke elu chromium alloy liner. Isi ihe na-ebute mgbawa bụ ntụpọ nkedo, dị ka nkedo porosity, oghere mbelata, porosity, nsonye, ​​wdg.
• Igwe igwe igwe ihe igwe chromium dị elu kwesịrị ịdị obere ma buru ibu, otu oghere bolt, ma ọ bụ enweghị oghere bolt. A naghị anabata ya iji nnukwu efere mkpuchi oghere buru ibu ma dị gịrịgịrị ma ọ bụ okpukpu abụọ.
• N'oge ntinye nke akwa mkpuchi chromium dị elu, a ga-edozi efere nke nwere oghere nke nwere oghere na ihe mkpuchi. Elu nrụnye na elu cylinder kwesịrị ịdị na kọntaktị. Ọ ka mma ịhọrọ akwa rọba dị ka ihe nkpuchi. A machibidoro iwu ịwụnye na iji akwa chromium liner na-enweghị akwa akwa ọ bụla. N'oge mbụ (Nnwale) ọrụ mgbe echichi, igwe igwe ga-ejupụta na ụfọdụ ego nke ihe tupu ọrụ. A machibidoro iwu ịgba igwe igwe na-enweghị ibu.

@Nick Sun     [email protected]