"Kuzununguka" mupeso yeMexico inorema paTorex Gold's (TSE: TXG) kota yekutanga, kunyangwe kugadzirwa kwakasimba kwe108,537 ounces egoridhe pakambani El Limon Guajes migodhi yemugodhi mudunhu reGuerrero.

Mukuburitswa, purezidhendi weTorex uye CEO Fred Stanford akacherekedza kuti shanduko yeakaunzi mukurapwa kwematombo akaunganidzwa uye kudzikira kwepeso - neinoda kusvika 25% mukati mekota - zvaireva mutengo wakakwira.

"Muchikamu chekota, shanduko yeakaunzi kune yakaunganidzwa ore yakakonzera kuwedzera kweinenge madhora zana paawanzi imwe kusvika kune yakazara mari mutengo uye-zvese-mukuchengetedza mari," akadaro Stanford.

"Kukanganisa uku kuchadzikira pamusoro pemakota anouya uye inotarisirwa kuenzana nemhedzisiro inotarisirwa muhuwandu hwekutanga hwepagore. Kukurudzira kwemari kuUS mukuita kuCOVID-19 kwakakonzera kudzikira kwemari zhinji dzemisika dziri kusimukira, kusanganisira yeMexico. Izvi zvinoita kuti tive kure neruzhowa rwemari yedu uye kana 'yakacherechedzwa kumusika,' iyo yakakosha yakarasika mukana wekubatsirikana kubva kuderera kwepeso, mihoro inokanganisa."

Mugodhi akatarisana neMexico akataura kurasikirwa kwemamiriyoni makumi mana nemanomwe emadhora pamari inosvika zviuru zana nemakumi manomwe nenomwe zvemadhora kwekota, zvichienzaniswa nekurasikirwa kwemamiriyoni zana nemakumi matatu emadhora pamari yemadhora zana nemakumi mapfumbamwe emadhora panguva imwe cheteyo ya2019.

Yakagadziridzwa mambure emari yaive $19.9 miriyoni. Iyo kambani yakashuma mari yakazara yemadhora mazana manomwe nemakumi mapfumbamwe nemapfumbamwe pa oz. uye AISC yemadhora mazana mapfumbamwe nemakumi manomwe nemashanu pa oz.

Iyo El Limon Guajes complex, mugodhi weTorex chete unogadzira, uri 180 km maodzanyemba akadziva kumadokero kweMexico City.

Mugodhi uyu wakavharirwa kugadziriswa kwakarongwa mukupera kwekota apo hurumende yeMexico yakaraira kumbomiswa kwemabhizinesi asina kukosha, kusanganisira migodhi yegoridhe, mukupindura denda reCovid-19.

Kuongorora kuchera paEl Limon Guajes uye chirongwa cheMedia Luna chekambani chiri pedyo chakamiswawo.

Torex inoramba ichibhadhara vashandi vayo panguva yekumiswa.

Mukupera kwaKubvumbi, kambani yakadhonza C$50 miriyoni panzvimbo yayo yechikwereti inotenderera kuti ipe imwe mari panguva yekumbomiswa.

Kambani iyi yakapera muna Kubvumbi iine C$134.8 miriyoni mumari uye yatora C$100 miriyoni panzvimbo yeC$150 miriyoni.

VaStanford, avo vari kusiya chigaro chemukuru uye vachatsiviwa naJody Kuzenko pamusangano wepagore unotevera wekambani iyi, vati kumiswa kwekambani iyi kunogona kubviswa panosvika Chivabvu 18. Stanford acharamba ari mubhodhi rekambani iyi sachigaro mukuru.

Torex yakabvisa gwara rayo regore muna Kubvumbi 2 uye inoti haigone kupa gwara idzva kudzamara yave nechokwadi chekumiswa.

Torex's stock yaive pasi 7.3% paTSX Chitatu masikati. Iyo kambani ine C $ 1.6 bhiriyoni yemusika capitalization.

Autogenous mill rudzi rutsva rwezviyo zvekukuya zvine mabasa ese ekupwanya nekukuya. Inoshandisa iyo yekukuya pachayo seyepakati, kuburikidza nekubatana kwekuita uye kugaya kuita kuti iwane comminution. Iyo semi-autogenous mill ndeyekuwedzera mabhora mashoma esimbi muchigayo chega, kugona kwayo kwekugadzirisa kunogona kuwedzerwa ne10% - 30%, kushandiswa kwesimba pane chimwe chigadzirwa chinogona kuderedzwa ne10% - 20%, asi iyo Kupfeka kwe liner kunowedzerwa ne15%, uye kunaka kwechigadzirwa kwakawedzera. Sechikamu chakakosha che semi-autogenous mill, ma shell liners e cylinder body akakuvadzwa zvakanyanya nekuda kwekukanganisa kwebhora resimbi rakasimudzwa neiyo liner yekusimudza danda pane liner kune imwe magumo panguva yekushanda kweSAG mill.

Muna 2009, maviri matsva semi-autogenous mill ane dhayamita ye7.53 × 4.27 akavakwa muPanzhihua Iron uye Steel Co., Ltd., ane gore negore dhizaini yematani 2 miriyoni / set. Muna 2011, imwe nyowani semi-autogenous mill ine dhayamita ye9.15 × 5.03 yakavakwa muBaima concentrator yePanzhihua Iron uye Steel Co., Ltd., ine gore negore dhizaini yematani mazana mashanu emamiriyoni. Kubva pakuedzwa kweiyo semi-autogenous mill ine dhayamita ye9.15 × 5.03, magoko evhare uye grid plate yeguyo kazhinji inopwanyika, uye chiyero chekushanda chinongova 55%, izvo zvinokanganisa zvakanyanya kugadzirwa nekubudirira.

Iyo 9.15 m semi-autogenous mill muBaima mine yePanzhihua Iron and Steel Group yakashandisa silinda liner inogadzirwa nevazhinji vanogadzira. Hupenyu hurefu hwesevhisi husingasviki mwedzi mitatu, uye hupenyu hupfupi ivhiki imwe chete, izvo zvinotungamira kune yakaderera kunyatsoshanda kwesemi-autogenous mill uye yakawedzera zvakanyanya mutengo wekugadzira. H&G Machinery Co.; Ltd  yakapinda mukati mesaiti ye9.15 m semi autogenous mill yekuenderera mberi nekuferefeta uye bvunzo. Kuburikidza nekugadzirisa kwezvinhu zvekukanda, maitiro ekukanda, uye nzira yekurapa kwekupisa, hupenyu hwebasa hwema shell liners anogadzirwa muBaima mine hwakapfuura mwedzi mina, uye mhedzisiro yacho iri pachena.

Chikonzero kuongororwa kwehupenyu hupfupi nyowani yeSAG mill shell liners

Iyo paramita uye chimiro che φ 9.15 × 5.03 semi-autogenous mill muBaima concentrator. Tafura 1 ndiyo parameter tafura:

Kutadza kuongororwa kwekare SAG mill shell liners

Kubva pakutumirwa kwe φ 9.15 × 5.03 semi-autogenous mill muBaima concentrator, chiyero chekushanda chinongosvika 55% nekuda kwekukuvara kusingaenzaniswi nekutsiviwa kwezvigayo, izvo zvinokanganisa zvakanyanya mabhenefiti ehupfumi. Iyo huru yekutadza maitiro eiyo shell liner inoratidzwa muFig. 1 (a). Maererano ne-on-site tsvakurudzo, iyo SAG mill shell liners uye lattice ndiro ndiyo huru yekukundikana zvikamu, izvo zvinopindirana nemamiriro ezvinhu muFig. 2 (b). Isu tinobvisa zvimwe zvinhu, chete kubva kune liner pachayo kuongororwa, matambudziko makuru ndeaya anotevera:

1. Pamusana pekusarudzwa kwezvinhu zvisina kunaka, chidimbu chechidimbu chesilinda chinosvibisa mukati mekushandiswa kwekushandiswa, izvo zvinoguma nekubatana pamwe chete kweplate ye liner, zvichiita kuti kuputsika uye kuputika;

2. Sezvo chikamu chakakosha che cylinder liner, nekuda kwekushayikwa kwekusagadzikana kwekupfeka, apo hupamhi hwehuni hunenge hunenge 30 mm, simba rose rekukanda rinoderera, uye kukanganisa kwebhora resimbi hakugoni kudziviswa, zvichiita kuti kuputsika uye kuputika. scrapping;

3. Kukanganisa kwemhando yekukanda, senge tsvina musimbi yakanyungudutswa, yakakwira gasi yemukati, uye isina compact chimiro, inoderedza kusimba uye kusimba kwekukanda.

Dhizaini nyowani yeSAG mill shell liners

Nheyo yekusarudzwa kwemakemikari kuumbwa ndeyekuita kuti ma mechanic zvivakwa zve shell liner uye grid plate isangane nezvinotevera zvinodiwa:

1) High kupfeka kuramba. Kupfeka kweshell liner uye grid plate ndicho chinhu chikuru chinotungamira mukudzikira kwehupenyu hwesevhisi yeshell liner, uye kupfeka kuramba kunomiririra hupenyu hwesevhisi yeshell liner uye grid plate.

2) Kuomarara kwakanyanya. Impact kuoma hunhu hunogona kudzoreredza mamiriro ekutanga mushure mekutakura rimwe simba rekunze ipapo ipapo. Kuti iyo shell liner uye grid plate isatsemuka panguva yekukanganisa kwesimbi bhora.

Kuumbwa Kwemakemikari

1) Zviri mukati kabhoni neC zvinodzorwa pakati pe0.4% uye 0.6% pasi pemamiriro akasiyana ekupfeka, kunyanya mutoro wekukanganisa;

2) Zvigumisiro zvinoratidza kuti zvinyorwa zveSi uye Si zvinosimbisa ferrite, kuwedzera chiyero chezvibereko, kuderedza kuoma uye plastiki, uye kuva netsika yekuwedzera kutsamwa, uye zvinyorwa zvinodzorwa pakati pe0.2-0.45%;

3) Mn zvemukati, Mn element inonyanya kuita basa rekusimbisa mhinduro, kuvandudza simba, kuomarara uye kupfeka kuramba, kuwedzera hasha brittleness uye coarsening chimiro, uye zvirimo zvinodzorwa pakati pe0.8-2.0%;

4) Chromium content, Cr element, chinhu chinokosha chekupfeka-resistant simbi, ine simba guru rekusimbisa pasimbi uye inogona kuvandudza simba, kuoma uye kupfeka kusagadzikana kwesimbi, uye zvinyorwa zvinodzorwa pakati pe1.4-3.0%;

5) Mo content, Mo element ndechimwe chezvinhu zvikuru zvekupfeka-resistant simbi, kusimbisa ferrite, kunatsa zviyo, kuderedza kana kubvisa hasha brittleness, kuvandudza simba uye kuoma kwesimbi, zvinyorwa zvinodzorwa pakati pe0.4-1.0%;

6) Zviri muNi zvinodzorwa mukati me0.9-2.0%,

7) Kana zviri mukati mevanadium zvishoma, saizi yezviyo inonatswa uye kuoma kunovandudzwa. Zvinyorwa zvevanadium zvinogona kudzorwa mukati me 0.03-0.08%;

8) Mhedzisiro inoratidza kuti deoxidation uye zviyo zvekunatsa mhedzisiro yetitanium zviri pachena, uye zvirimo zvinodzorwa pakati pe0.03% ne0.08%;

9) Re inogona kuchenesa simbi yakanyungudutswa, kunatsa microstructure, kuderedza gasi zvirimo, uye zvimwe zvinokuvadza musimbi. Simba, plastiki uye kuneta kuramba kwesimbi yakakwirira inogona kudzorwa mukati me 0.04-0.08%;

10) Zvinyorwa zveP uye s zvinofanira kudzorwa pasi pe0.03%.

Saka kuumbwa kwemakemikari kweiyo nyowani dhizaini SAG mill shell liners ndeiyi:

Sravana Sameeralu Serial 4th Casting Technology

Zvinhu zvakakosha zvetekinoroji yekukanda

1. Carbon dioxide sodium silicate self-harding jecha inoshandiswa kunyatso kudzora mwando wejecha rekuumba;
2. Doro-based pure zircon poda coating ichashandiswa, uye zvigadzirwa zvakapera hazvifanirwe kushandiswa;
3. Uchishandisa furo kugadzira sampuli yakasimba, imwe neimwe yekukanda fillet inofanirwa kuburitswa kunze kwemuviri, ichida saizi chaiyo uye chimiro chinonzwisisika;
4. Mukuita kuumba, deformation inofanira kunyatsodzorwa, uye mushandisi anofanira kuisa jecha zvakaenzana, uye jecha mold inofanira kunge yakanyatsokwana uye kunyange, uye panguva imwe chete, deformation yemuenzaniso chaiwo inofanira kudziviswa;
5. Mukuita kwekugadzirisa mold, ukuru hunofanira kunyatsotariswa kuti ive nechokwadi chechokwadi chejecha mold;
6. Iyo mold yejecha inofanira kuomeswa isati yavhara bhokisi;
7. Tarisa saizi yepakati yega yega kudzivirira kusaenzana kwemadziro ukobvu.

Casting process

Kudurura tembiricha ndicho chinhu chikuru chinokanganisa chimiro chemukati chekukanda. Kana tembiricha yekudurura yakanyanya, kupisa kunopisa kwesimbi yakanyungudutswa kwakakura, kukanda kuri nyore kugadzira shrinkage porosity uye chimiro chakakora; kana tembiricha yekudurura yakanyanya kuderera, kupisa kwakanyanya kwesimbi yemvura kudiki, uye kudurura hakuna kukwana. Tembiricha yekudurura inodzorwa pakati pe1510 ℃ uye 1520 ℃, iyo inogona kuvimbisa yakanaka microstructure uye kuzadza kwakakwana. Kudurura kwakaringana kumhanya ndiyo kiyi kune compact chimiro uye hapana shrinkage mhango mumukwidza. Kana kukurumidza kudururira kuri pedyo nenzvimbo yepombi yemvura inotonhorera, nheyo ye "inononoka kutanga, ipapo inokurumidza, uye inononoka" ichateverwa. Ndiko kutanga kudira zvishoma nezvishoma. Kana simbi yakanyungudutswa ichipinda mumutumbi wekukanda, kukurumidza kwekudira kunowedzerwa kuita kuti simbi yakanyungudutswa ikwire kumukwidza nekukasira, uye ipapo kudira kunononoka. Kana simbi yakanyungudutswa yapinda pa 2/3 yehukwiridzo hurefu, chinosimudzwa chinoshandiswa kugadzira kudira kusvika pakupera kwekudira.

Kurapa kwekupisa

Kudyidzana kwakakodzera kwepakati uye kwakaderera kabhoni zvimiro zvesimbi zvinogona kunonoka zvakanyanya shanduko yepearlite uye kuratidza shanduko yebainite kuitira kuti iyo bainite inotongwa chimiro inogona kuwanikwa muhuwandu hukuru hwekuenderera kutonhora chiyero mushure meaustenitizing, iyo inonzi bainitic simbi. Bainitic simbi inogona kuwana yakakwirira yakazara zvivakwa ine yakaderera kutonhora mwero, nokudaro kurerutsa maitiro ekupisa kupisa uye kuderedza deformation.

Isothermal kurapwa

Iko kubudirira kukuru mumunda wesimbi nesimbi simbi kuwana bainite simbi zvinhu neisothermal kurapwa, inova imwe yenzira yekugadzira super simbi uye nano simbi zvinhu. Nekudaro, maitiro ekugadzirisa uye michina yakaoma, kushandiswa kwesimba kwakakura, mutengo wechigadzirwa wakakwira, kudzima nharaunda yekusvibiswa kwepakati, kutenderera kwenguva refu uye zvichingodaro.

Kutonhora kwemhepo kurapwa

Kuti akunde zvikanganiso zvekurapa isothermal, rudzi rwesimbi yebainitic yakagadzirwa nemhepo inotonhorera mushure mekukanda. Zvisinei, kuti uwane mamwe bainite, mhangura, molybdenum, nickel uye mamwe alloys anokosha anofanira kuwedzerwa, ayo asina kungova nemutengo wakakwirira asiwo ane kuoma kwakashata.

Kunodzorwa kutonhora kurapwa

Kutonhodza kunodzorwa pakutanga yaive pfungwa mukuita kwekukunguruka kwesimbi. Mumakore achangopfuura, yakagadziridzwa kuva nzira inoshanda uye inochengetedza kupisa kupisa. Munguva yekurapa kwekupisa, iyo yakagadzirwa microstructure inogona kuwanikwa uye zvinhu zvesimbi zvinogona kuvandudzwa nekudzora kutonhora. Tsvagiridzo yekutenderedzwa nekutonhodzwa kwesimbi inoratidza kuti kutonhorera kunodzorwa kunogona kukurudzira kuumbwa kweiyo yakasimba uye yakaoma yakaderera kabhoni bainite kana kemikari yesimbi yakakodzera. Nzira dzinowanzoshandiswa dzekutonhodza kunodzorwa dzinosanganisira pressure jet cooling, laminar cooling, water curtain cooling, atomization cooling, spray cooling, plate turbulent cooling, water-air spray cooling, and direct quenching, etc. 8 marudzi ekudzora kutonhodza nzira dzinowanzoshandiswa. .

Heat treatment processing method

Zvinoenderana nemamiriro emidziyo yekambani uye mamiriro chaiwo, isu tinotora inoenderera inotonhorera kupisa kupisa nzira. Iyo chaiyo maitiro ndeyekuwedzera tembiricha yekudziya ne AC3 + (50 ~ 100) centigrade zvinoenderana neimwe chiyero chekudziya uye nekumhanyisa kutonhora nekushandisa mvura-yemhepo yekupfapfaidza yekutonhora mudziyo wakagadzirwa nekambani yedu kuitira kuti zvinhu zvacho zvitonhodzwe nemhepo uye. self hardened. Inogona kuwana yakakwana uye yakaenzana bainite chimiro, kuita yakanakisa kuita, sezviri pachena yepamusoro kune zvakafanana zvigadzirwa, uye kubvisa yechipiri mhando dzehasha brittleness.

The Results

• Metallographic chimiro: 6.5 giredhi Saizi yezviyo
• HRC 45-50
• Iyo shell liner yeguyo hombe semi-autogenous inogadzirwa nekambani yedu yave ichishandiswa kwemakore anoda kusvika 3.5 pa Φ 9.15 m semi-autogenous mill muBaima mine yePanzhihua Iron and Steel Group Co., Ltd. hupenyu hwesevhisi hunodarika Mwedzi mina, uye hupenyu hwakareba hwesevhisi ndeye 7 mwedzi. Nekuwedzera kwehupenyu hwebasa, iyo unit yekukuya mutengo inoderedzwa zvakanyanya, kuwanda kwekutsiva iyo lining plate kunoderedzwa zvakanyanya, mashandiro ekugadzira anovandudzwa zvakanyanya uye kubatsirwa kuri pachena.
• Kusarudzwa kwezvinhu ndiyo kiyi yekuvandudza hupenyu hwesevhisi yezvigayo zveguyo hombe semi-autogenous mill, uye alloying yemagiredhi esimbi inzira inoshanda yekuvandudza kusakara kwekupfeka.
• Iyo bainite chimiro chine simba rakawanda uye kuomarara kwepamusoro ndiyo vimbiso yekuvandudza hupenyu hwesevhisi yeshell liner yesemi-autogenous mill.
• Iyo yekukanda maitiro uye kupisa kupisa maitiro akakwana kuti ave nechokwadi chekuti chimiro chekukanda chakakora, chinogona kunyatso kuvandudza hupenyu hwesevhisi yesemi-autogenous mill shell liner.

Nick Sun       [email protected]