Whai muri i te whakaputanga o te putanga o Oketopa o te International Mining, me te āhuatanga kuru me te kawe i roto i te poka ā-tau, i tirohia e mātou tētahi o ngā huānga matua o ēnei pūnaha, arā, te whāngai apron.
I roto i te maina,ngā whāngai āpereHe mea nui te mahi a ēnei ki te whakarite kia maeneene te mahi me te whakanui ake i te wā mahi. He rerekē ngā whakamahinga o ēnei i roto i ngā ara iahiko tukatuka kohuke; heoi, kāore i te tino mōhiotia ō rātou āheinga katoa puta noa i te umanga, ā, he maha ngā pātai ka ara ake.
Ka whakautua e Martin Yester, Tautoko Hua Ao, Metso Bulk Products, ētahi o ngā pātai nui.
I ngā kupu māmā noa iho, ko te whāngai apron (e mōhiotia ana ko te whāngai paraharaha) he momo whāngai miihini e whakamahia ana i roto i ngā mahi whakahaere rauemi hei whakawhiti (whāngai) rauemi ki ētahi atu taputapu, mai i te taonga rokiroki, pouaka, hopper rānei hei tango rauemi (koiora/toka) i te tere whakahaeretia.
Ka taea te whakamahi i ēnei whāngai i roto i ngā mahi maha i roto i ngā mahi tuatahi, tuarua me te tuatoru (whakaora).
Ko ngā whāngai mekameka tarakihana e pā ana ki ngā mekameka raro waka, ngā roera me ngā wira hiku e whakamahia ana hoki i runga i ngā puruta me ngā keri. Ko tēnei momo whāngai te nuinga o ngā ahumahi e hiahia ana ngā kaiwhakamahi ki tētahi whāngai ka taea te tango rauemi me ngā āhuatanga rerekē. Ka ārai ngā hiri polyurethane i roto i te mekameka i te urunga o ngā rauemi whakakoi ki ngā pine me ngā pūkaha o roto, ka whakaiti i te kakahu me te whakaroa i te oranga o ngā taputapu ki te whakaritea ki ngā mekameka maroke. Ka whakaitihia hoki e ngā whāngai mekameka tarakihana te parahanga haruru kia marino ake ai te mahi. Ka tukatukahia ngā hononga o te mekameka kia roa ake te ora.
I te nuinga o te wā, ko ngā painga ko te pikinga ake o te pono, te iti ake o ngā wāhanga e manawapa ana, te iti ake o te tiaki me te pai ake o te whakahaere whāngai. Hei utu, ka piki ake te hua o ēnei painga me te iti rawa o ngā aukati i roto i tētahi porowhita tukatuka kohuke.
He whakapono whānui mōngā whāngai āpereKo te tikanga me tāuta whakapae. Āe, he rerekē ki te whakapono rongonui, ka taea te whakairi ki runga i ngā pari! He maha atu ngā painga me ngā āhuatanga ka puta mai i tēnei. Ina tāutahia he whāngai āperona ki runga i te pari, he iti ake te wāhi e hiahiatia ana – ehara i te mea ka whakawhāitihia e te pari te wāhi papa anake, engari ka whakaitihia hoki te teitei o te hopara whiwhi. He ngāwari ake ngā whāngai āperona pari ina tae mai ki ngā poraka rauemi nui ake, ā, i te nuinga, ka whakanui ake i te rōrahi i roto i te hopara me te whakaiti i ngā wā huringa mō ngā taraka kawe.
Kia maumahara kei reira ētahi āhuatanga hei mōhio māu i te wā e tāuta ana i tētahi whāngai paraharaha ki runga i te pari hei whakapai ake i te tukanga. Ko te hopara kua hoahoatia tika, te koki piko, te hoahoa o te hanganga tautoko, me te pūnaha o ngā ara me ngā arawhata huri noa i te whāngai he mea nui katoa.
Ko tētahi whakaaro hē noa mō te whakahaere i tētahi taputapu ko: "Ko te tere ake, ko te pai ake." Mō ngā whāngai aperona, ehara i te mea pērā. Ko te tere tino pai ka puta mai i te kimi i te taurite i waenga i te whai huatanga me te tere tuku. He puhoi ake tā rātou oma i ngā whāngai whitiki, engari he take pai.
Ko te tere tino pai mō te whāngai apron ko te 0.05-0.40 m/s. Mena kāore te konganuku e whakakoi, ka taea te whakanui ake i te tere ki runga ake i te 0.30 m/s nā te mea ka iti ake te kakahu.
Ka whakararu te tere o te mahi: ki te nui rawa ō tere, ka tūpono koe ki te tere o te pakaru o ngā wāhanga. Ka heke hoki te whai huatanga o te pūngao nā te pikinga o te hiahia mō te pūngao.
Ko tētahi atu take hei maumahara māu i te wā e whakahaere ana i te whāngai āperona i te tere tere ko te pikinga ake o te tūponotanga o ngā whiu. Tērā pea ka pāngia te rauemi me te pereti e ngā pānga haehae. Nā te mea kei te rangi pea te puehu rere, ehara i te mea ka nui ake ngā raruraru i te waihangatanga o ngā whiu, engari ka nui ake hoki te morearea o te taiao mahi mō ngā kaimahi katoa. Nō reira, he mea nui ake te kimi i te tere tino pai mō te hua o te tipu me te haumaru mahi.
He herenga anō ō ngā whāngai āperona mō te rahi me te momo o te konganuku. Ka rerekē ngā herenga, engari kaua rawa ngā rauemi e tukuna noatia ki runga i te whāngai. Me whakaaro koe ehara i te mea ko te wāhi anake e whakamahia ai te whāngai, engari ko te wāhi hoki e whakatakotoria ai taua whāngai i roto i te tukanga.
Ko te ture whānui mō ngā rahi o te whāngai epron hei whai māu, ko te whānui o te paraharaha (te remu o roto) kia rua te rahi o te wahi nui rawa atu o te rauemi. Ko ētahi atu āhuatanga, pērā i te hopara tuwhera kua hoahoatia tika me te whakamahinga o te "pereti hurihuri toka", ka pā pea ki te rahi o te paraharaha, engari he mea nui anake tēnei i ētahi wā.
He mea noa te kaha ki te tango i te 1,500mm o ngā rauemi mēnā ka whakamahia he whāngai 3,000mm te whānui. Ko ngā rauemi kino 300mm i tangohia mai i ngā puranga konganuku kuru, i ngā pouaka rokiroki/whakaranu rānei, ka tangohia mā te whakamahi i tētahi whāngai ā-taura hei whāngai i te kuru tuarua.
I te wā e ine ana i te rahi o te whāngai apron me te pūnaha taraiwa (mōta) e rite ana, pērā i ngā taputapu maha i roto i te umanga keri, he mea tino nui te wheako me te mōhiotanga ki te tukanga katoa. Ko te ine i te rahi o te whāngai apron me whai mōhiotanga taketake ki ngā raraunga wheketere kia tika ai te whakakī i ngā paearu e hiahiatia ana e te "Pepa Raraunga Tono" a te kaiwhakarato (kia whiwhi rānei te kaiwhakarato i ā rātou mōhiohio).
Ko ngā paearu matua hei whai whakaaro ko te tere whāngai (te tihi me te noa), ngā āhuatanga o te rauemi (pēnei i te makuku, te nekehanga me te āhua), te rahi poraka mōrahi o te konganuku/toka, te mātotoru papatipu o te konganuku/toka (te mōrahi me te iti rawa) me ngā āhuatanga whāngai me te putanga.
Heoi, i ētahi wā ka tāpirihia pea ngā taurangi ki te tukanga rahi o te whāngai aperona me whakauru. Ko tētahi atu taurangi nui me pātai atu e ngā kaiwhakarato ko te whirihoranga o te pūaha. Ina koa, ko te whakatuwheratanga roa tapahi pūaha (L2) kei runga tonu i te whāngai aperona. Ki te tika, he tawhā matua tēnei ehara i te mea mō te rahi tika o te whāngai aperona anake, engari mō te pūnaha taraiwa hoki.
E ai ki te kōrero i runga ake nei, ko te matotoru o te konganuku/toka tētahi o ngā paerewa matua, ā, me uru atu hoki te rahi o te whāngai puranga whai hua. Ko te matotoru te taumaha o tētahi rauemi i roto i tētahi rōrahi kua hoatu, ko te tikanga ka inehia te matotoru ki ngā tāne ia mita pūtoru (t/m³) me ngā pauna ia waewae pūtoru (lbs/ft³). He mea nui kia maumahara ko te matotoru te mea e whakamahia ana mō ngā whāngai āperona, ehara i te matotoru o ngā mea totoka pērā i ētahi atu taputapu tukatuka kohuke.
Nā te aha te hiranga o te matotoru o te rauemi? He whāngai rōrahi ngā whāngai aperona, ko te tikanga ka whakamahia te matotoru o te rauemi hei whakatau i te tere me te mana e hiahiatia ana hei tango i tētahi tana o te rauemi ia hāora. Ka whakamahia te matotoru iti rawa hei whakatau i te tere, ā, ko te matotoru mōrahi te mana (taipana) e hiahiatia ana e te whāngai.
I te katoa, he mea nui kia whakamahia te kiato "papatipu" tika kaua te kiato "totoka" hei whakatau i te rahi o tō whāngai apron. Mena he hē ēnei tātaitanga, ka raru pea te tere whāngai whakamutunga o te tukanga o raro.
He mea nui te whakatau i te roa o te kutikuti o te hopper i roto i te whakatau tika me te whiriwhiri i te pūnaha whāngai me te pūnaha taraiwa (mōta). Engari me pēhea tēnei e tino mōhio ai? Ko te roa o te kutikuti hopper ko te ine mai i te pereti tuara o te hopper ki te pae kutikuti i te pito putanga o te hopper. He māmā noa iho te ahua, engari he mea nui kia mōhio kei te pohehe tēnei ki te rahi o te tihi o te hopper e pupuri ana i te rauemi.
Ko te whāinga o te kimi i tēnei inenga roa kutikuti o te hopper he whakatau i te rārangi papa kutikuti tuturu o te rauemi me te wāhi e wehe ai te rauemi i roto i te remu (kutikuti) mai i te rauemi (L2) i roto i te hopper. Ko te ātete kutikuti o te rauemi e whakatauhia ana i waenga i te 50-70% o te kaha/mana katoa. Mā tēnei tātaitanga roa kutikuti ka hua ake he iti te mana (te ngaronga o te whakaputanga) he nui rawa rānei te mana (te pikinga o ngā whakapaunga whakahaere (operax)).
He mea nui te tawhiti o ngā taputapu ki tētahi tipu. E ai ki te kōrero i mua ake nei, ka taea te whakairi i te whāngai apron ki runga i ngā pari hei penapena wāhi. Mā te whiriwhiri i te roa tika o te whāngai apron, ehara i te mea ka taea anake te whakaiti i te whakapaunga whakapaipai (capex), engari ka whakaiti hoki i te whakapaunga hiko me ngā utu whakahaere.
Engari me pēhea te whakatau i te roa tino pai? Ko te roa tino pai o te whāngai apron ko te mea ka taea te whakatutuki i te mahi e hiahiatia ana i roto i te roa poto rawa atu. Heoi, i ētahi wā, mō te mahi, ka roa ake pea te whiriwhiri i te whāngai ki te "whakawhiti" rauemi ki ngā taputapu o raro, me te whakakore i ngā wāhi whakawhiti (me ngā utu kore e hiahiatia).
Hei whakatau i te whāngai poto rawa atu, me te whāngai pai rawa atu, me whakanoho ngāwari te whāngai āperona i raro i te hopper (L2). Whai muri i te whakatau i te roa kutikuti me te hohonu o te moenga, ka taea te whakaiti i te roa katoa hei ārai i te mea e kiia nei ko te "whakamakuku-ake" i te pito tukunga ina noho mangere te whāngai.
Ko te whiriwhiri i te pūnaha taraiwa tika mō tō whāngai apron ka whakawhirinaki ki te mahi me ngā whāinga o te whāngai. Kua hangaia ngā Whāngai Apron kia mahi i ngā tere rerekē hei tango mai i te rokiroki me te whāngai ki raro i te awa i te tere whakahaeretia kia pai ai te mahi. Ka rerekē pea ngā rauemi nā ngā āhuatanga pēnei i te wā o te tau, te tinana o te konganuku, ngā tauira pupuhi me te whakaranu rānei.
E rua ngā momo puku e tika ana mō te tere rerekē ko ngā puku miihini e whakamahi ana i ngā whakaiti taputapu, ngā motuka auau rerekē me ngā puku auau rerekē (VFD), ngā motuka waipēhi me ngā waeine hiko me ngā papu nekehanga rerekē. I ēnei rā, kua whakamātauhia ngā puku miihini tere rerekē hei pūnaha puku whiriwhiri nā te whanaketanga hangarau me ngā painga whakapaunga whakapaipai.
He wāhi tō ngā pūnaha taraiwa waipēhi, engari kāore i te kiia he mea pai i waenga i ngā taraiwa taurangi e rua.
Wā tuku: Hurae-14-2022
