Imithwalo ye-Polyurethane Screen: Iyavuselela Ukwahlulwa Kwemithwalo Engcono

Ngaba Kufuneka Kuthintakale Izigolide Zokuthinta ZePolyurethane

Ukuma ukuthi izikrini zomlando wesikrini wepolyurethane ziqinisekiswe ngendlela efanele, zingasebenzi kakhulu kuzivibhendi ezihlukahlukene nezixhobho zezinto ezingena. Uma okuqinisekisa akuyiyo konke, kusenzeka into ethile kwizikhungo zesikrini. Izinxenye zilahlekile, okulahleka indlela esebenzayo yokuchithwa. Ngokwesicwangciso esishicilelwe ngoPhephandaba elwendulo nguBafundi beMining, kukhona uhlu olubalulekile phakathi kweqiniso lokuhle neqiniso elibi. Iisikrini eziqinisekisiweyo zibambe iipathikile ngama-93% apho kufuneka, ngelishwa eziphambili ziyakwazi kuphela ama-76%. Olu gap ubalulekile kakhulu xa kuchazwa ubunzima bokusebenza kumithombo yoprocessing.

Imithetho Yokuqinisekisa Ukugcinwa Kwizixhobo Zesikrini SePolyurethane

Amashini esiGaba sengilaziya ezigcwele kuleli xesha ayinzeliwe ngokuthi kuthintana umthwalo kuqobo olunye. Indlela yokusebenza kwale mikhumbi yophazanyo ihlala ibheka ukulungiselela amandla aphazanye kumagugu akhokelelwe, lokhu kusho ukuthi lezi zishini zibalaseka ngeminyaka engu-2.5 ngaphambi kokuba kubonakale ububi bokugcina okulinganayo kunazo ezinhle ngaphandle kwalokho uhlu lwamagugu. Isifundo esishicilelwe ngo-2022 sabona ukuthi izilinganiso ezahlukene zokuphazanyika ziyaphatha kanjani iqiniso. Basebafundela ukuthi lapho isilinganiso siphansi kusengili-12 ku milimitara ejabulisayo, izinto zihlukana ngendlela ehambelana ngenkathi ziqashelwa. Kodwa uma usebenzisa isilinganiso phansi kusengili-18 N/mm², izinto ziqaqa ngokushesha emakhampeni apho izinxenye zihlangana. Lokhu konke kunceda abasebenzi bezithuthuko ukulungiselela izixhumanisi zabo ukuze kube neminyaka yobubi.

Izinqumo Ezifanayo Zokuphazanya Ukuze Mthintele Ububi Bokuphazanyika Nezinkinga Yomugqa

Ukwehluleka komugqa kwenza u-65% wokushintshwa kwezikrini ngaphambi kwesikhathi ekusetshenzisweni kwamaminerali amahle. Izinhlelo zokucindezela ezi-modular ezinama-adjuster wamandla wokuqinisa okuqhubekayo zinciphisa ukucindezelwa emaphethelweni ngama-40% uma kuqhathaniswa nemiklamo ye-single-bolt, njengoba kuboniswe esifundweni sesimo se-North American iron ore plant [^ 1 ^]. Amasu ayinhloko ahlanganisa:

• Ukuhlolwa kokulinganisa ngaphambi kokucindezelwa kuya ku-± 2% ukubekezelelana ngesikhathi sokufakwa
• Izikali zokucindezelwa ngesikhathi sangempela ukuqapha umthwalo ngesikhathi sokusebenza

[^1^]: Imikhuba emihle yokufaka izikrini ze-polyurethane ezicindezelwe

Imiphumela Yokucindezela Okungafanele Ekusebenzeni Kahle Kwama-screening Nasekuphileni

Izikrini ezingasebenzi kahle zithola ukwelulwa kwe-aperture okusheshayo okungu-3x, okubangela ukuhlukaniswa okungalungile kwezinhlayiya emithonjeni engaphansi kuka-100 μm. Ukucindezela ngokweqile kunciphisa ukucindezelwa kwemvelo kwe-polyurethane, okwandisa ubungozi bokuqhekeka ngama-28% (i-SME, 2023). Zombili lezi zimo zinciphisa imijikelezo yokuthutha kusuka ezinyangeni ezingu-1218 kuya kwezingu-69 zenyanga, okwandisa kakhulu izindleko zokusebenza.

Ukuzondla Kakhulu vs. Ukungazondli: UkuThola Isilinganiso Ngokungabi ngaphansi Kwamathambo

Ngomphakathi wemikhawulo engu-0.5 mm, kubaluleke ukugcina ukuqinisekisa phakathi kwe-15 ne-22 kN ngasinye isikwere methe, ukuthola indawo eqhakazile apho izinto zilindeleke kodwa zibe ngokwaneleyo. Imbizo yePurdue ephakathi kweminyaka 2019 ikhombisa ukuthi lapho izihlangu zisebenza ngaphakathi kwalawa maxabiso, ziqhubeka ngezinkinga zokunqamula ngama-37%, futhi zilindele kanye ne-98% yezidingo zabo ezihlukileyo. Into eyenzela ubuchwepheshe buyiphakade kukhona ukuguquka kwe-tension okusabela kuthintana nokuthinta kwegida ekususweni. Lezi zindlela ezithintekayo zingakwazi ukongezela ubude bezinsuku zabasebenzi ngama-19%, into ekhombiswe kakhulu emathulini amahle aqondene nokulawula ukuvibala abantu abaningi bethuleni.

Ukulingana, Ukuthatha Ukuvibala, Nezinkinga Zokungavimbiya KwiZinhlangano Ezizondlwanywayo

Indlela I-Tension Yenza Ukulingana Futhi Iyanciphisa Ukuvibala

Xa kubekwa ngokuhamba, okuqondilekayo kwebhodi yesikrini yepolyurethane kuyakha into ethile - indawo eyenziwe ngempela ngoba iyahlukene futhi neyisindiso ngasinye isikhathi. Ukukhanya phakathi kwalesi zinto kanye nesikrini esingcono sengaphandle kakhulu. Kusobala ukuthi i-polyurethane ebekelwe ihlaziywa ngaphezulu kahulumeni ama-18 kuze kube 24% kunazo ezinye izinketho zomlando, njengoba kuchazwe kulesikhathi seMaterials Today ngo-2023. Lokhu kancane kongena kumemeza ukuthatha imphambano ngaphandle kokulahleka kwebhodi yesikrini. Kodwa okubaluleke kakhulu abasebenzi emashinini ekunika izinto ezithile yizindlela eziphansi zokuhlaziywa. Izinhloso zibonisa ukuthi kukhona ama-30 kuze kube 40% amandla aphansi xa isikrini asetshenziswa ngendlela efanelekileyo, lokhu kusho ukuthi kunezinkinga eziphansi kuzo zonke izixhobo ezilandelayo. Inxalenye ebekwe kuleli uphondo olwenguqulo lasekuseni kAdvanced Engineering Materials yayibona lokho. Babona ukuthi izimo ezithile zenza izindawo apho amandla akhathazekwa, kanjalo njengoba kusenzeka namathuba athengisiwe asebenzisa irabhi kodwa engayilahlela ubuncane bomsebenzi wesikrini.

Ukugqagqa Kwe-Oscillation: Ukuvikela Ukulayishwa Kwe-Particle Kwi-Screening Edele

Xa kuthunyelwe ngempilo, amaxesha angenza i-oscillations phakathi kwe-400 ukuya ku-800 ngexesha. Lokhu kwenza umsebenzi wokucula okunceda ukuthwalela izinto ezidelela ngaphezulu kwesiseko se-1.5 mm. Ezinye iifundo ezibekwe ecanada ebandakanyayo ukuphatha kwe-copper zafumana ukuthi iisikrini zakhala zicinyane 27% kangangokuba zisebenzisa i-polyurethane ephambili ngaphandle kwezintlu zaseleyo. Iinkcitho ezincinci zisebenza njengeendlela zokuvikela ukugqagqiswa ezibonakala kwiindlela ezihlelekileyo, zivikela indawo eyinikezelayo yezinto kwiizesikhungo ngokusebenzisa iziqhamo ezilandelwayo ze-mechanical ngexesha elithile.

Ukunciphisa Ukulayishwa Kwemigomo Ngokuhamba Kwesikhungo Esenziweyo

Iisikrini ze-polyurethane ezithunyelwe zivikela ukulayishwa ngendlela eziphindana ngayo ezintathu:

1. Ukusabalalisa Kwesilinganiso – Isilinda esiphindaphinde 92% emva kokuchaphazeka (ngaphandle kwe-68% kwiisikrini ezingathunyelwanga)
2. Ukuncipha Ngobude Bephesenti – Ukuguquka kwebumba elikhula phakathi kwe-0.2–0.5 mm ngexesha lokusebenza
3. Ukunxulunxulu Kwezintambo Zasehlotini – Izintambo eziphakeme nge-amplitude ye-12–18 mm

Lokhu kuhlambulukile kukwenzela ukuthi izinto ezinemitholampofu yekhathode (ngaphakathi kwe±0.3 mm) zibe ngu-98% aziphumule izikhephe zokuchweba, ngokulinganisa no-74% emshineni esedimente. Lezi zinyathelo zihlanganiswe nokuphazanyiswa kwezimali zokuhlela okungu-34% kuzindleko zokusebenza kwizimo ezenza izinto eziphakeme kweziboniso.

Ipolyurethane Ngokulinganisa Nezimbotshane Ezihleliweyo: Ukulinganisa Kombono

Impendulo Yenkohlaka Nokwenza Kokuqina: Amahluko Omkhawulo

U-polyurethane usebenza kahle kakhulu emaphakathini apho kukhona ubungqamuzi obukhulu ngoba kungasebenzi ngendlela yobuchwepheshe ngaphandle kokuba kuphuluphuliwe yisakhiwo. Ubunjingili bokuthinta kwenzela ukuthi ngalunye lwazi luthinte ngokwalo, kepha amaphakathi angahlawulwa kakhulu. Ngokwesicwangciso esithile sikaHaverniagara ngo-2023, lokhu kwenza indlela yokuhlukanisa kube yinkimbinkimbi ngama-22%. Xa kubhekwa indlela amaphakathi achazwa ngayo, u-polyurethane unikeza inzima engaphezu kuka-94% kumaphakathi amancane kunama-2 mm. Lokhu kubuhle kakhulu kunoma-78% okubonwa ngemikhumbi yamakhala ethintekayo emathubeni. Kunye izinkampani ezimanje ezakha uhlelo oluhlangene olungenza kanjalo u-polyurethane ngezwire enkulu zokugaya. Le mlando iphinde iphinde inzima ngama-40% kunazo ezindala zomkhumbi wethintekayo. Futhi kunceda ukuncipha ubungqamuzi obungafuneki ngoba kunezici zokucindezela ngokwayo.

Izinkinga Zoqhaga Lwe-Polyurethane NgoKuqhubeka Kwezikhala Ezithintekayo

Izinhlelo zepoliyurethani ezihlanganisiwe ngokuhamba kuziphazanyiswa kwezinhlelo zemithambo yenhloko:

• Ukukhangelwa Kwesihlobo : Ipholiyurethani ehlanganisiwe ngokuhamba iba neminyaka engu-5 ngaphezulu kumithambo yenhloko embonakaliseni ukusika komthamo wasekholo.
• Ukulungisa Ukucindezwa : Ukuhambana kwezinhlo kumithambo kunciphisa izimo zokucindezwa nge-67% ngokushintsha kwezikhala ngokuphambene.
• Ukungena Okuphakade : Ubunzima obuncane bucina ubude bendawo nge-18%, bunciphisa isivuno sezinsimbi nge-1.2 kWh ngayiton ecebiswa.

Ngaphansi kwezikhala ezingcono ngokushesha nge-35% kunazo ezifanayo, ipholiyurethani inakekela ukutholwa kwezinsimbi ezincane ngaphandle kokuchitha okukhula.

Isibonelo: Ukuthuthuka Kakhulu Emhlabathini Wempilo Yekhanda

Indawo yokusebenza kwesilica seyisililo esidla ngomthamo wasekhanda wabeka futhi imithambo yenhloka ngamaphaneli apholiyurethani anqamuziwe ngokuhamba, abengenjalo amaphakade atholakele:

Iphlanti yasusa izindleko zokubuyisela komedya ngemali engu-$18,000 kuye ngenyanga, njalo nokuthuthukisa ubunzima bokuphathwa kwizimo ezahlukene kusuka ku-5% ukuya ku-17%.

Imithetho emihle yokufaka kanye nokuhlanza ukuze kube nemfundo elidala

Uqinisekisa ukuthi kufakiwe ngendlela efanelekile kanye nokuhlola kancane ukuze kugcinwe isimilo

Ukufinyelela kakhulu kwe-tension kubala ngokuthi unezixhobo ezilungileyo zokulungisa kanye nokulandela imigomo emizimelelo. Xa izibhedu ziqhubekwa ngaphezulu, zenza amathuba okugcinwa okongcono okunyusa inkathi yezinkinga zokudonsa. Ngendlela efanayo, uma into ethile ayiqhubeki ngokwaneleyo kuyakha izinkinga zokuhlukatha futhi ingathintela isimo sesivimba ngasikhathi. Ngokwemfundo eyisembeleko yesenzo sezibhedu se-industrial esenzelwe kuleli viki, kube yisimo sikaqondile ukuthi ukusebenzisa kusengaphandle kuka-20 kuze kube kuya kuma-30 Newton meters we-torque kusemthethweni wokuphindeka kanye nokuphinda kancane kungasebenza kangcono xa kuhlinzwa izinxucu. Emva kokufakwa kwenzeka, amagunya ekugcineni kumele achaze amazimu e-tension ngokusheshayo ngaphambi kuka-200 amahora ekuhamba. Bathanda ukusebenzisa izilinganiso ze-laser deflection kulolu daba, bahlola noma kunjalo izinguquko ezihlukile kunezinguquko zokuqala ezilingalwe ngexesha lokufaka.

Ukulinganisa Amazimu e-Tension Nezici Zomthelelo Wokudla

Ukuvavanywa kwezincwadi ezincane (≤2 mm) kudinga ukunxasazeka okuphezulu ngakuba kufanele kube ngaphezulu kuka-10–15% ukuze kungcolise izinselelo, kodwa izimali eziphaphazelayo zifuna ukunxasazeka okuncane ngaka-5–7% ukuze kutholakale ukugaya.

Ukusebenza kwezinkinga zokugcwalisa okuhambisana nesilinganiso sesimo sezinto nezidingo zokuguqulwa kwizinto kusungula izindleko zokubuyisela ngemidiya ngo-38% ngonyaka, ngantso yomhlaziyalo wokwakha kwezimali eziyisisekelo we-2023.

Imibuzo Evame Ukubuzwa

Iyini imidiya yesikrini ye-polyurethane?

Imidiya yesikrini ye-polyurethane iyisahluko sesandla esenzelwe ngomthwalo we-polyurethane, esitholakala ngokuthatha iqhina, ukuphila kude, nokuthatha amathambo.

Kungani ukubamba kubalulekile kumedia wokuhlukanisa we-polyurethane?

Kubalulekile ukulinganisa kakhulu njengoko kusidla ukuthi i-aperture zesikrini ziphinde ziphinde ziqinisekise isandla, okuquka ukuthuthukisa kwekhasi yokusikrisa nokuphila kude komthwalo wesikrini.

Kunjani ukulinganisa okungahle kusinda ikhasi lokusikrisa?

Ukulinganisa okungahle kungasungula ukunweleka kwe-aperture, ukuchazwa kwegciwo ngendlela eyingahle, nokwandulela kwezinkinga zokuhluka, konke okuquka ukuthulaswa kwekhasi lokusikrisa.

Ziziphi iimpawu zokulinganisa polyurethane kunye nesikrini esihlanganisiweyo sekhonkco eliphilileyo?

Ukulinganisa kwe-polyurethane kunceda ekunqamuzeni kwebhubhu, ekuthinteni kwebhubhu, nokunakekelwa kwezempilo kunye nesikrini esihlanganisiweyo sekhonkco eliphilileyo.

Kufuneka kubhekwe ngemini yimali amanzi?

Kufuneka kubhekwe ngemini yimali amanzi ku-200 yokusebenza ukuqinisekisa ukusebenza kwempilo kanti kubeke ubuchwepheshe obutsha.