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Iquarry engakwazi ukuthenga isand yalo – Ingxenye yefomu esithathelwe
Iquarry yase-Maharashtra yasenza isand esenzelwe ngumuntu kodwa yayiphila ukuthenga kwi-ready-mix concrete plants. Umhlaba, owasenzelwe ngokusebenzisa i-jaw-and-cone circuit, wayengumlando futhi wayengumshayane—umkhakha wokusebenzisa isand wabuye phezulu kuma-28%. Abaprofesi bezisand bavamiselela ngokuthi kuyadlula amanzi futhi kuyabeka isand esingaphansi. Umphathi wiquarry wabekwa phakathi kokuthinta i-VSI sand maker noma kufuna ukuphila kwezinye iziquarry zokuthenga isand esezintweni.
Wakhetha indlela ye-VSI. Ngeminyaka emithathu emlandelana nokufaka isikhombisa sekhupha esisodwa sesikhupha sokubuka ngaphansi, iqwari lalithola isandhi engezansi kwe-12% yendlela yokubuka ngaphansi—futhi lalithengisa konke okutholakayo. Abaproduswa beconcrete bavuma ukuthi kubhekiswe ekupheleni kwesandhi entsha, kubhekiswe ekupheleni kwezinkambo zokusebenzisa isementi ngeminyaka emishumi eyisigaba lesi-10, ngokuvamisa ukuthi izinkambo zokuthola ziyabhekiswe ngokuphelele. Umphathi weqwari wabuyisela isikrini sakhe sokufaka ngeminyaka emishumi emabili nesihlanu ngokuthengisa ngemiphumela ephakeme futhi ngokuthenga ngemiphumela eyisigaba le-10.
Lokhu kucacile. Ngeminyaka eyisishiyagalombili, itimu yethu yokuprosesa amathambo yasibonisa izikhululo zezandimaker eziyisigidi nesikhombisa kuIndia, Kusitali yaNingizimu, naseAfrika. Lokhu okubhekene ngezikhululo kuyikubona ukuthi lapho abaproducera bazi imithambo yokuqhubeka kwemithambo futhi ubukhulu bakho kubaphakathi kwezinhlobo zezinhlobo, teknoloji ye-VSI ibuyisela isand ezenziwa ngokusebenzisa imithambo kusukela kwezinhlobo ezincinci kusukela kwezinhlobo ezinkulu zezinhlobo zokwakha. Ukuzwa tekhnoloji ye-VSI sand maker akuyiyo kuphela ukukhetha izinkampani—kuyiyo ukuvula ubukhulu obungapheli kwezinhlobo zakho zokwakha futhi ukufikiswa kwezidingo eziphakeme zezinhlobo zokwakha zezinhlobo zokwakha.
Ukwenza Kwamaphakathi Amashumi Amashumi – Isayensi Emva Kwesand maker ye-VSI
Inhliziyo yomshini wokwenza isihlabathi we-VSI iyinhlangano yokushaya eshalofini evundlile esheshisa impahla yokudla ibe ngesivinini esiphezulu kunama-70 m/s. Amandla okuxosha inkanyezi avela ngaphandle kwe-rotor, awashayise ngodonga lwezinto eziqinile, ezishaywe ngaphambili - indawo yokuchoboza idwala. Lokhu kungqubuzana kwezinhlayiya ezinamandla amakhulu kususa imiphetho ebuthakathaka, enezinhlayiya emingceleni yemvelo yezinhlamvu, okwenza kube nezimo ezifanayo, eziyindilinga.
Esifundweni secala se-2023 segranite-to-sand eningizimu yeNdiya, isihlabathi esenziwe ngohlelo lwe-VSI oluvaliwe lwafinyelela kumaphesenti ayi-10 kuphela, uma kuqhathaniswa nama-27% avela kusekethe lomhlathi ne-cone elungisa okuphakelayo okufanayo. Ukugqwala okukhulu kuphinde kuqhekeze okusanhlamvu okuncane, kuthuthukise ukubopha kwe-cement-paste. Ukuhamba kwe-rotor okuguquguqukayo nokulawula ukugeleza kwe-cascade kulawula amandla omthelela, kulinganisela ukuqina kokukhiqiza okuhle, kuyilapho izikrini ezihlanganisiwe ezinemigqa eminingi ziphinde zijikeleze okusanhlamvu okwedlulele noma okungajwayelekile kuze kutholakale ifomu elifanele
| Ubuchwepheshe Bokushaya | Inkomba Yokuqhakaza Okuvamile | Uhlobo Lwezinhlayiya | Umthelela Kokhonkolo |
|---|---|---|---|
| Umhlathi + Isigaxa Sokushaya | 25–30% | Izindwangu zokugqoka | Isidingo samanzi esiphakeme; ingxube ebuthakathaka |
| I-VSI Sand Maker (i-rock-on-rock) | 8–15% | I-cubic, i-equant | Usephakanyiswa kwezinkumbu zocement; ubukhulu obungaphezulu |
| VSI ngekhotho lokugcina lokugxilwa | 8–12% | Kubhalwe kahle kwezinkumbu zokuphakama | Ukuhlelwa kwezinkumbu; ukusebenza kahle kakhulu |
Ngani amacrushers asezingeni lezinye ayifeli – Ingxenye yezinkumbu ezihlukene
Amacrushers asezingeni lezinye nezincane abaphakamisa amandla okuphefumula, okuyisiphumo sokuphefumula kwesithuthi ngamandla okuphefumula okwenzeka ngokuzenzakale, okusenza amandla okuphefumula akhona ngokuzenzakale—okusenza amandla okuphefumula akhona ngokuzenzakale, okusenza amandla okuphefumula akhona ngokuzenzakale. Lezi zinhlobo ziyabeka isibonelo sokusebenza kwezinkumbu zocement futhi ukuphakama kwezinkumbu. Amagraini amaningi amangalisa amanqina ayizokwenzela ukuthi kufanele kubekwe amanzi angaphezulu futhi ukubhala kwezinkumbu kubeka phansi ngokuphelele ngokuphakama kwe-15% ngokwesicelo sika-ACI 2022.
Kusukela, izisitemu ezisebenzisa ukuphepha kumele zibe nezindlela eziningi zokuphepha kodwa zihlukene ekuthi zithole isand nesikhundla esifanayo, esingatholakali ngamaphakade kwezilingo zezibalo zika-IS 383 noma ASTM C33. Izingxelo zokugradayisi zabo ziyagqoka kakhulu, nokuthi izinkundla ezingcwele ziyagqoka ngokungafani. Ngaphezu kwalokho, i-VSI sand maker ithola izinto ezimbili zokufana nasezilingo ngendawo eyodwa: umechaniki wekuphindeka okwenzeka ngokuphepha kuyakhiwa ngokuzenzakalelayo izinkundla ezinamathuba, ngakho-ke isistimu yokuvala ukubhekisa isand isebenza ngokuphakamisa ukuthi kubekwe isand esifanayo, isula izinkundla ezingcwele, futhi isula ukuthi kubekwe isand esingaphansi kwe-flakiness index—kukhulula izindlela zokufana okuningi nasezindlela zokubuyisela ezincongco kwezindawo zokuphepha zezinhloso.
| Inqanawa yemiphumela | I-Jaw + I-Cone Circuit | I-VSI Sand Maker Circuit |
|---|---|---|
| I-Flakiness Index | 25–30% | 8–15% |
| Ukukhulisa izinkundla (<75 µm) | Ayizange ibe yisibonelo, kusukela ku-15% | Iyakwakhiwa (8–15%) |
| Ukuthi kubekwe isand esifanayo | Ayigqoki; kunezindlela eziningi ozoyidinga | Isifanayo; kungakwaziwa ngomlando wokuphinda |
| Ukuthanda kwezilungu emconcrete | Ngaphezulu (ngokwakhiwa kwezindawo ezingavuli) | Ngaphansi (ukubambisana kwesibhakabhaka) |
| Ukuhlanganisa ne- IS 383 Zone II | Okunqamuka kakhulu | Kuhlanganisa ngokuphelele |
Isifundo sesikhathi segranite ku sand – Ukufikiswa kwe- IS 383 Class I eSouthern India (2023)
Isiprojekthi yase-2023 eKarnataka yasitshisa isandla esiphuma kwezinyango zasekhaya ngokusebenzisa i- VSI sand maker. Umphakathi wokusebenza—izinkolo zegranite ezithile ezinomkhala wokugcina we-20 mm—zisuselwa ngokusebenzisa indlela yokubambisana engaphakathi nesihlangu sesikhathi esiphakeme nokhaya lokugcina okwenziwa ngokushintana kwemithombo.
Emva kokusukula, isiphumo sesiye sasifanana nezinkinga zokugradela kwe-IS 383 Class I: umodulus wokufinina ngu-2.8, indikisi yokuqondwa engaphezulu kuka-15%, futhi ukulinganisa kwamafines (<75 µm) kwasemthwakweni phakathi kwe-10–12%. Ngokulungisa isikhathi sokuphuma kwesibhakabhaka (55–65 m/s) nokuvalelwa kwe-cascade, abasebenzisi bakhulula amaphakathi amanqandu, bongeza amagraini amane amacube kune-80%. Isiphumo sako ngumshini wokudla okungadingeki ukubhalwa nesand yomfula yokuqonda izinto ezisemthwakweni, kunciphisa izindleko zezinto ezizokusebenza ngo-18% futhi kuzivula ukubhala kabusha okuthinta amafines. Lokhu kubonisa ukuthi, ngokulungisa kahle, umshini wokudla we-VSI ungathola isand yokuqonda ngokuphelele emithwakweni yezinto ezingaqondi kanye nezinkambu zokugradela zezinhlobo zokugcina zokugcina zezinhlobo zokugcina zezinhlobo zokugcina.
Ukugradela Kuhle nokulawula Amaphakathi – Isigaba Esikhundleni Sokusebenza Nokuphakeme
Kungakufanani nezithuthi zokuphatha ezizenzileyo ezenza izinhlobo zezinto eziningi, ezizingathelwe ngokwanele, izithuthi zesand zika-VSI zinceda ukulawula ngokwesikhathi sezinye zezinye izinyathelo zokuzwa. Ngokuhlela ispeed yekhombe yokuqala kanye nesilinganiso sezinto esingaphansi kwakho (ukuvula kwekhombe), abasebenzi bakhuluma isikhombisi sokuzwa ukuze sifanele nesikhombisi sokufuller-Thompson sokubhekana neconcrete. Isibonelo, ukongeza ukuvula kwekhombe ngo-5% kusenziwa ukunciphisa izinto ezincinci ezingu-150 µm ngo-3%, okunakekela ukuthi kubhekeka ngokwamanzi okuningi kanye nokubhekana nokushaya isikhombisi ngaphandle kokukhetha ukusebenzisa amasuperplasticizer ngokwenge.
Kumazwi okwenziwe ngokuphathelene, umortar owenzelwe ngamandla amanzi ase-VSI (amandla amancane 12%, umthwalo wokufinyelela 2.7) wabona ukuthi isiqondiso sokugcina esikhathini sezinsuku e-28 sibuyela kusukela kubunzima be-mix yombili osethu yamandla amanzi—ngokuvuselela ukuthi amaphakathi ayisikhiyana kahle futhi ukuthi izindawo zokugxuma ziyinkimbinkimbi kakhulu. Ukuphatha kahle kwamandla amancane—ukuthi amandla amancane amakhulu ayisikhathi esikhathini se-8–15%—kuvumela ukuthi kukhona ubungo obukhulu kakhulu phakathi kwe-paste ne-aggregate kodwa akasimame ukuthi umsebenzi wokuzilima uqondile. Lokhu kubonakala kakhulu ukuthi umthwalo we-VSI uyisiphumo esifanele kubantu abayisebenzisa i-concrete yokuqala ukuthi bafanele ngezinhlobo eziningi zokusebenza kahle kodwa bakunciphisele ukuthi kunezinkinga zokuguqula kubunzima nokuthi kungakwazi ukuthi kubhekwe ngokushesha.
Ukuphetha Kwemithetho – Ukuphetha Imithetho ye-ASTM C144 ne-IS 383
Umthwathi we-sand we-VSI uwumemeza abaphambili ukuthi bafanele ngokuzenzekelayo izindlela zokusebenzisa amasiphephelo ngokuthi abe nemiphumela yezinhlobo zemithwakuli nezinhlobo zokugxila okufanele kuzo izindlela ezinkulu. ASTM C144 (Isiqalekiso Sesand Sase-Masonry Mortar) sibeka isikhundla sokuphakamisa kwezinhlobo zemithwakuli ezingenabomvu nasezingenabomvu, okungahleli ukubamba kwe-mortar. Ngokusebenzisa ukuthi amathambo aqondwa ngokukhanya kakhulu kwezinye izinye, umthwathi uhlawula amathambo ngokwesikhundla sakho esingcono, ukwenza amathambo amathathu emva kokuthi abe namathathu angaphezulu. Ukuchaza kwabantu abangaphambi kubonisa ukuthi izindawo zokusebenzisa i-VSI ezihlelwe kahle zisobala isikhundla sokuphakamisa kwezinhlobo zemithwakuli ngokuphakamisa kwe-10% ngokwesiqu 2023 yezindawo zokusebenzisa, ukuvula izinhlobo zemithwakuli ezingenabomvu okuyoba yizinto ezingavumelekileyo.
Kubalula okuphambili ukuthi imishini ingakwazi ukuphatha izinto ezincane. IS 383 inqamuka izikhundla zokugrada ngokujulile kanye nezindawo zokufaka isilt. Ukuchaza kwe-VSI sand maker kwesikhathi sokuguqula ispeed yorotor kanye nesistimu yokugrada ngohlobo lwesilayi sivumela abasebenzi ukuphatha ivolumu yezinto ezingapansi kwe-75 micron futhi bakhusele isikhundla sokugrada esihlukene. Lokhu kubhekise ukungafiki kwezinto ezingapansi kwe-micro-fine okuzimisa umkhombo wobunqulo, kodwa kwenza isand ezinhlanu ezihlukene okuhlanganisa nezikhundla zokuqala zesi-2. Ngokuba yisikhundla sokuvaleka kusendaweni, lokhu kususa ukunqula okunye nokususa izinyathelo ezinconywayo zezinyathelo ezinzima, kubhekise ukuthi iziqephu zonke zizihlukene ngaphandle kokunqula okunye.
| Standards | Imfanelo Ebalulekileyo | Ukuchaza kwe-VSI Sand Maker |
|---|---|---|
| ASTM C144 | Kuvumela izinyathelo ezinkulu/ezinde | Ukuchaza kwe-flakiness <10% kufikwa |
| IS 383 Zone II | Izikhundla zokugrada; isilt content ≤15% | Izinyathelo ezinconywayo; ukugrada okuphambili |
| ASTM C33 | Ukugrada kwezinyathelo zobunqulo | Ukuphikisana ngokwesilinganiso esinye |
Iziphumo ezingakuthathelwa – VSI ngaphezu kwezinhlangano zezindaba
Isibonelo sesikhathi se-2023 esihlanganisa izinhlangano eziningi zezindaba zokugcina kubonisa ukuthi isand maker yase-VSI iyaphoqa okukhona nge-42% ngaphansi kwesilinganiso sokufakwa kwezinhlangano zokugcina zase-jaw-noma-zase-cone. Ukuphupha kakhulu kwezinhlangano eziflati nezinhlangano ezinomphumela ngqo kubuyisa ukusebenza kwezinkunkuma kanye nokugcina. Izinhlangano ezinomphumela zingaqondana kahle, ukuncima ukugcina kwezinhlangano kanye nokucima ukusebenza kwezinkunkuma kanye nokusebenza kwezincwadi emishini yokugcina. Okuphuzekayo kukhula kakhulu kokuphakama kwezinkunkuma kanye nokubaluleka kakhulu kokubaluleka – ukuphikisana nezidingo ezithile zezinhlangano zokufakwa kwezinhlangano zase-ASTM C144 kanye ne-IS 383.
Kubaprodisa wezinkulungwane zokwenza izinkulungwane, ukuguqula kumthambo wokusebenzisa i-VSI kuthiwa ngokuqondiswa kwemali yokusebenzisa i-binder nokuthiwa ngokuphawula kokugcina kwezinkinga zokusebenza kwezinsuku eziningi. Umprodisa wokusebenzisa izinkulungwane eTamil Nadu wabhabha ukuthi wabeka ukusebenzisa i-Ordinary Portland Cement kusukela ku-380 kg/m³ ku-345 kg/m³ emva kokuguqula kumthambo wokusebenzisa i-VSI—lokhu kuthiwa ngokuqondiswa kwemali kwe-35 kg ngomqanda wokugcina, noma kune-Rs200 ngomqanda wokugcina ngemikhono yasezinsukwini. Ngemqanda yezinkulungwane ezingu-10,000 ngomnyaka, lokhu kuthiwa ngokuqondiswa kwemali kwe-Rs2 million ngomnyaka.
Ukuzimisa Kwemithambo – Kufuneka Ubonakale Nini Ekhiyipha Lokusebenza KweVSI Sand Maker
Ngaphezu kwezinkinga zokusebenza kwezinyathelo, ukuzimisa kwemithambo kuyisiphumo sokusebenza kwezinsuku zokusebenza nokuthiwa ngokuphawula kokugcina kwezinkinga zokusebenza kwezinyathelo. Izinhloso zokuzilungiselela zokuzilungiselela ziyashiyekile:
| Inqubo YokuDizaynisa | Kungani Kuyisisekelo? | Kufuneka Ubonakale Nini |
|---|---|---|
| Ukuzimisa Kwesikhombiso Sokurhola | Sikwenzela ukuthi sibone isikhathi sokusebenza sokurhola; kuyisiphumo sokusebenza kwezinsuku zokusebenza | Izinto zokusebenza zokuphatha izinkulungwane zokusebenza kwe-tungsten carbide; isikhombiso sokurhola esizimiselwe ngokulinganisa |
| Isikhombiso Sokurhola Sokubhala | Sikwenzela ukuthi sibone isikhathi sokusebenza sokurhola; kuyisiphumo sokuzimisa | Okusebenzisa i-oil okuhlanzekile noma okusebenzisa i-grease; ukulandela isikhathi sokusebenza |
| Ukubuyeza Kwesikhathi Sokugcina | Kulungise ukudala kwezinkambo zokugcina; kwenza ukuthi ukugcina kwezinkambo kwenziwe ngokushesha | Ngokwezilwanyana noma ngokuphathwa ngohand; ukubuyeza ngokushesha kwesikhathi sokusebenza |
| Ukufikelela Ukuzulazula | Kunciphisa isikhathi sokungasebenzi kusukela ekubuyiseni izinkambo zokugcina | Amadlozi amaningi okubona; izintiphi zokuguqula ngokushesha zokurhota |
Izinkambo ezihle zokwenza isand zokuvavanya (VSI) zinamagama okurhota okwetungsten carbide ozokwenza izinkambo e-500–800 ezinkambo phakathi kokuguqula izintiphi, futhi izinkambo zokulubulala okwamanzi nezinkambo zokuhlola isikhati ukuze zikhubaze ukungasebenzi kahle. Abasemthwakazi abaningi bakhuluma ngamakhanda okuzulazula okwesithunjiwe ngokulinganiswe ku-5–7% yomthwakazi wemashini uma kuzulazulwa ngokuhle.
Ukuxhumana Kwemithwakazi – OkuBhalwe Ngaphambi KukaG‑Honor Games
Ukufinyelela isimo esihle sokufaka isand futhi ukuthi isand sibe yisikhathi esifanayo sokugcina kudinga kangaka ukukhetha imishini kusukela emabhaleni—kudinga umkhathi othembekile okwazi ukuthi ukugcina ngokwesibonelo kuyini, ukuthengisa kwezinkambo zokugcina kuyini, nokuthenga kwezinkambo zokuthenga izinkambo ezihle. G‑Honor Games iyathumela le ndlela eyenzelwe kusukela ku-VSI sand maker manufacturing. Amashini asebenzayo amanqaku e-vertical shaft impactors avela ngokuphepha kwe-rotors, amaparts ayo asebenzisa tungsten carbide okwesifunda, nokufaka oil-lubricated bearing systems okuyabika ukusebenza kakhulu noma yiziphi izithuthi ezinamandla kakhulu. Sisiza ngamaphuzu amahle—kubukwa kwezinye izinyathelo zokuproducwa kuya kuma-systems awonke abhekene ngokuphatha ngokuphatha nokufaka isikrining ne-recirculation. Isiqondisi sethu sisenza izindlela zokuziphatha zokuphatha kwenyanga, isilinganiso sokuphatha kwendlela yokuphatha, nokukhetha izinto zokuphatha ngokwesifunda sakho esikhona. Kuma-producers wama-aggregate nama-suppliers wama-construction material, lokhu kuyabika ukunciphisa izindlela zokusebenza, ubukhulu obuhle bokuproducwa, nokuthutha okuhle okuyabika ukusebenza kwakho kwezinyathelo zokuproducwa.
Imibuzo Evame Ukubuzwa
Umbuzo: VSI ibonisa nini ekuphatheni isand?
Impendulo: VSI ibonisa i-Vertical Shaft Impactor—umshini wokuphatha owenza isand esihle, esihle, ngokuphatha kwe-rotor okuphakeme kakhulu.
U: Umthwalo wokwenza isandhi we-VSI uyasebenzisa njani ukwenza amaphakathi amathathu?
I: Umthwalo wokwenza isandhi we-VSI uyasebenzisa ukuphatha kwezilwane ngamazilwane, apho amaphakathi amahle aqhubeka ngokugcina ngokugcina, akhipha amaphakathi amadala, amadlulayo, futhi ayenza amaphakathi amathathu amanqanqane.
U: Kungani ubukhulu bophakathi buyisisekelo esibalulekileyo kusukela kwezinkumbulo?
I: Amaphakathi amathathu amanqanqane ayabuyisa ubukhulu bokubambisana, ubuncinane bezinga lezinye izinto, ubuncinane bezinkinga zokusebenzisa izinkumbulo, futhi bayenhance ubukhulu bokuzenzekelayo nobukhulu bokuhlala kwezinkumbulo ngokulingana nesikhundla samaphakathi amadlulayo, amanqanqane.
U: Ingaba umthwalo wokwenza isandhi we-VSI unako ukufanelela nezimboni ze-IS 383 ne-ASTM?
I: Yebo. Izikhombiso zesandhi se-VSI ezihle ziyafanelela ngokuphelele nezimboni ze-IS 383 Zone II ne-ASTM C144/C33 ngokuhambisana, ubukhulu bokuphatha kwezilwane, futhi ubukhulu bokuphatha kwezinye izinto.
U: Kungani umthwalo wokwenza isandhi we-VSI ubonakala kahle kunamathwalo we-jaw ne-cone?
I: Umthwalo wokwenza isandhi we-VSI uyawenza amaphakathi amathathu amanqanqane ngomlando wodwa, nokuphatha kwezilwane kubancinane ngama-42% kulokho kwezikhombiso zezindaba zokuphatha kwezilwane, futhi kunezidingo zokuhambisana okuhle kanye nokuncinane kwezinkinga zokusebenzisa izinkumbulo kwezinkumbulo.
U: Isandhi esingakanani esingakwenzelwa ngumthwalo wokwenza isandhi we-VSI?
A: I-inkulungwane yokuprodukha iyahlukahluka ngokwehlo lemodeli nezinto ezihlanganisiweyo. Izinhloso zokuprodukha ziyahlukahluka kusukela ku-20 ku-300 izithonni ngamahora ngokwesayizi yebhola yokuqala nezinhloso zezinto ezihlanganisiweyo.