I te mea e aro nui ana te whenua ki te tiaki taiao, hei momo para totoka, kua noho te whakamahinga o te para maitai hei kaupapa nui. Kei roto i tēnei tuhinga he otinga hangarau whānui mō te hangarua para maitai. Me whakarite e te hangarau tukatuka maroke te whakaora pai o ngā konganuku i te taha kotahi, me te whakamahinga whānui o ngā toenga para i te taha kē. Ko ngā mahi tukatuka para maitai e whai ake nei kua whakarārangihia: Te kuru whiriwhiri; te wehenga aukume me te tūranga o tētahi mira roera pēhanga teitei kotahi-taraiwa hou i roto i te whakamahinga whānui o te para maitai; mā te whakamahinga o ngā taputapu hou ka taea te whakaiti i te utu o te kuru para maitai, ā, ka nui ake ngā painga mō te whakamahinga o te para maitai. Nā te whakatairanga i te whakamahinga whānui o te para maitai i hanga te āheinga. Ko te whakatairanga i tēnei ariā whānui i roto i te umanga me whai mahi tahi a ngā kamupene hanga maitai, ngā tohunga tukatuka kohuke me ngā mātauranga, te whakatinanatanga whānui o te tono, me ngā tari hokohoko me te whakatairanga.
Ngā whakamahinga hanga o te para maitai
1) Ka whakamahia te para maitai hei hanga i ngā ranunga sima me te raima. Kei roto i te para maitai ngā kohuke hohe pērā i te tricalcium silicate (C3S), te dicalcium silicate (C2S) me te rino aluminate me ngā āhuatanga sima waipēhi, e rite ana ki ngā āhuatanga o te sima. Nō reira, ka taea te whakamahi hei rauemi mata me te ranunga sima mō te hanga sima kore-kirinikara, he iti ake te sima kirinikara. He tino pai ngā āhuatanga o te sima para maitai pērā i te ātete ki te kakahu, te kaha piko teitei, te ātete ki te waikura me te ātete ki te huka.
2) Ka whakakapia te kōhatu kuru me te kirikiri pai e te para rino. Ko ngā painga o te kōhatu kuru he kaha teitei, he mata taratara, he ātete pai ki te kakahu me te roa, he nui te rahinga, he pai te pumau, me te kaha ki te whakakotahi me te uku. Ki te whakatauritea ki te kōhatu kuru noa, he ātete hoki ki ngā āhuatanga o te pakaru pāmahana iti, nō reira ka taea te whakamahi whānui i roto i te whakakī i te miihini rori. Ko te para rino, hei taumaha rerewē, he āhuatanga o te kore e whakararuraru i te mahi whakawhitiwhiti kōrero a te pūnaha rerewē me te kawe hiko pai. Nā te mea he pai te uruhanga wai me te rerenga wai o te para rino, ka taea e ngā wāhanga sima kei roto te whakapakeke kia nui. He pai hoki te para rino mō te hanga rori i ngā repo me ngā takutai moana.
I tēnei wā, ko te tikanga whakamahi para rino o te whare e tino whakamahia ana ko te kuru i te para rino ki te -5mm hei whakakapi i te onepu awa hei rauemi hanga, ko te mira poroporo rānei i te para rino kuru hei paura pai hei whakamahi hei tāpiri sima. Kua whakahaerehia hoki e Shandong Huate Magnetoelectric Technology Co., Ltd. he rangahau hōhonu mō te whakamahinga whānui o te para rino, he whakamahi auaha i te mira roera pēhanga-teitei kotahi-puku ki te kuru pai o te para rino, he whakapai ake i te hangarau tukatuka para rino, ā, kua tutuki ngā painga ōhanga pai. Kua angitu te whakamahi i roto i te Pangang Mining me tētahi umanga para rino i Lianyungang.
Ko te tukanga whakaputa tuku iho o te para maitai e whai ake nei:
1) Ka kuruhia ngā wahi nunui ki te mīhini kuru kauae ki te -50, kātahi ka wehea te rino aukume ki te pūrei aukume.
2) Whakatakotoria te rahi wehenga o te konganuku ki te +45 mm. Ko te toenga 0-45 mm ka whakamahia hei hanga rori me ngā rauemi whakakī. Hei whakanui ake i tōna uara tono, ka taea te wehewehe i te para maitai ki te 0-4, 4-8 me ētahi atu momo rerekē. He iti ake te whakapaipai e hiahiatia ana mō te hangarau, ā, he iti hoki ngā utu whakahaere. Heoi, neke atu i te 50% o te ihirangi konganuku i roto i te para e kukū ana ki te kaha -10 mm, nō reira ka puta te nuinga o te ngaronga o te konganuku i tēnei hangarau, engari ka piki ake te ihirangi konganuku taumaha.
Nō reira, kua whānuitia te whakamahi i te huri mākū, inā koa mō te para i hangaia i roto i te hanga maitai koranu teitei kei roto ko te Cr, Ni, Mo kounga teitei, me ētahi atu. Ko ngā tukanga noa ko te kuru me te huri pai e rua ngā taahiraa (mira tokotoko/mira pōro). Nā te mea he uaua te huri i te konganuku he ngāwari ki te huri, ka taea te wehe i te para konganuku me te maitai mā te tātari, te whakarōpū rānei. Ko te pai o te wāhanga kohuke o te para he nui ake i te 95% me raro iho i te 0.2mm. Ko te tere whakaora konganuku o tēnei tukanga he nui ake i te 95%, ā, ko te hua o te konganuku kukū i hangaia he 90 ki te 92%. Mai i te tirohanga o te wehenga o te konganuku me te para, ka taea te kī ko tēnei tukanga te tukanga pai rawa atu.
Ko te ngoikoretanga matua o tēnei tukanga ko te para maitai kua wehea he para kikokore. Nā te mea he tukanga mākū te tukanga, he uaua ki te whakamahi i roto i te hanganga whare. Nō reira, ko te nuinga o ngā rauemi para maitai e toe ana i muri i te whiriwhiringa whakarewa ka makahia, ā, he maha ngā wā ka puta tēnei nā te utu nui o te whakamaroke mākū me ngā here ture huri noa i te ao. Ko tētahi tono nui ake te uara me whai tikanga kē atu hei rongoā i te paru mākū (te whakamaroke, te whakamātotoru, me ētahi atu).
Me whiriwhiri i waenga i te tere whakaora o te konganuku, i te wātea rānei o te para e toe ana. I te nuinga o te wā, ka whakawhirinaki tēnei whiriwhiri ki te uara o te konganuku kua whakaorangia.
Ko ngā tukanga noa i tēnei wāhanga koia ēnei:
Ka kuruhia ngā wahi nunui ki te mīhini kuru kauae ki te -50, kātahi ka wehea te rino aukume ki te pūri aukume.
-Ka kuruhia te para maitai 50 mā te mīhini kuru hama, te mīhini kuru kōne rānei, ka tātarihia mā te tātari paparanga-maha te mīhini kuru pānga, -ka taea te whakamahi i te hua kirikiri 20-10 hei kirikiri, -ka taea te whakamahi i te hua kirikiri 10–1 hei onepu pai.
Ripanga I
Te tātari i te rahi o te matūriki o te whāngai 50mm ki roto i te kuru hama
Ka hurihia te para maitai -10 karāhe ki roto i te mira pōro maroke kia puta he paura angiangi -200 mata, kātahi ka whakamahia he wehewehe aukume paura maroke hikohiko hei tango i te rino hei tāpiri sima.
Wā tuku: Paenga-whāwhā-12-2021