Lokacin da kuka ji 'simintin saka hannun jari na colloidal silica', mutane da yawa nan da nan suna tunanin abin ɗaure - kawai ruwan madara da kuke haɗawa cikin slurry. Wannan shine wuri na farko da tunani yakan yi kuskure. Ba manne ba ne kawai; shi ne gaba dayan tsarin kashin bayan harsashi, kuma yadda kuke sarrafa sinadarai da aikace-aikacen sa ya nuna ko kun sami simintin gyare-gyare mara lahani ko rumbun ajiya mai cike da tarkace. Na ga shaguna suna zuba kuɗi a cikin allunan ƙira kawai don a rasa su duka akan wani harsashi mara kyau wanda ya faɗi ko jijiya. Ainihin wasan yana cikin rarraba girman silica na colloidal silica, kwanciyar hankali na pH, kuma a zahiri, horo na sarrafa tsari, wanda mutane da yawa ba su la'akari da su har sai sun fuskanci gazawar tsada.
Rashin Fahimtar Matsayin Colloidal Silica
Bari mu sami takamaiman. Colloidal silica ba samfuri ɗaya bane. Abubuwan da kuke samu daga masu kaya daban-daban suna nuna hali daban. Mun koyi wannan hanya mai wuyar shekarun baya. Mun canza zuwa silica colloidal mai rahusa, mara alama don aikin simintin gyare-gyaren harsashi, muna ɗaukan ƙayyadaddun bayanan da ke kan takardar sun kusa isa. Abubuwan da ke cikin sodium ya ɗan fi girma. Sakamakon? Bayan matakin dewaxing, riguna na farko sun haɓaka micro-crazing. Ba a bayyana nan da nan ba, amma lokacin zafi mai zafi, waɗannan ƙananan fasa sun yaɗu. Simintin gyare-gyare na ƙarshe, musamman a cikin hadadden sassa na bakin karfe, sun nuna daidaitaccen shigar ƙarfe. A jimlar rashin tsari. Wannan shine lokacin da aka danna: kwanciyar hankali na ionic da abun ciki Na2O a cikin ɗaure sigogin da ba za a iya sasantawa ba ne. Ba kaya ba ne.
Wannan yana da alaƙa kai tsaye cikin simintin saka hannun jari na musamman gami kamar na tushen nickel. Waɗannan allunan suna da manyan abubuwan narkewa kuma suna da saurin amsawa. Idan harsashi ba daidai ba ne kuma yana da ƙarfi, kuna samun hulɗar ƙarfe-harsashi - wani mummunan lahani da ake kira slag inclusion ko surface pitting. Babban-tsarki, silica colloidal low-alkali yana da mahimmanci a nan. Yana samar da cibiyar sadarwa mai ƙarfi, mai jujjuyawar silica bayan harbe-harbe. Na tuna wani aiki don bangaren turbine inda muka yi amfani da daidaitaccen ɗaure; Ƙarshen saman bai yarda ba. Canja zuwa wanda aka kera, colloidal silica tsarin tare da m barbashi rarraba warware shi. Shaidan yana cikin wadannan bayanai.
Kuna ganin kamfanoni kamar Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) tare da shekarun su uku a cikin ƙirar harsashi da saka hannun jari. Za su san wannan a fakaice. Lokacin da kuke mu'amala da alluran tushen cobalt a rana da rana, ba za ku iya ɗaukar abin ɗaure a matsayin tunani na baya ba. Ayyukan su na dogon lokaci yana ba da shawara mai zurfi, fahimta mai amfani game da waɗannan hulɗar kayan aiki wanda kawai kuke samu daga maimaitawar samarwa da warware matsala.
Sarrafa Tsari: Inda Ka'idar ta Haɗu da Gidan Shagon
Da kyau, don haka kuna da ɗaure mai kyau. Ramin na gaba shine yanayin dakin slurry. Yanayin zafi da kula da zafi. Yana da kama da asali, amma na kasance a cikin wuraren da aka samo asali inda wannan shine tunani na baya. Colloidal tushen silica slurries suna da hankali. Idan shagon ya yi zafi sosai, slurry gels da sauri, dankowar spikes, kuma kaurin murfin ku ya zama mara daidaituwa. Danshi ya yi yawa, kuma lokacin bushewa tsakanin riguna ya miƙe, yana kashe haɓakar haɓakar ku. Muna da lokacin rani inda AC ta kasa a cikin dakin slurry. Dukan samar da zuba jari Dole ne a goge bawul na jikin bawul saboda gashin farko ya bushe da sauri, yana haifar da rauni mai rauni tare da shimfidar stucco na gaba.
Hanyar dipping da stuccoing wani fasaha ne. Tufafin farko shine komai. Yana buƙatar kwafin cikakken bayanin ƙirar kakin zuma. Muna amfani da cakuda gari mai kyau na zircon tare da colloidal silica don wannan rigar ta farko. Amma maida hankali na wakili na jika yana buƙatar zama tabo. Kadan kaɗan, kuma kuna samun kumfa da ɓoyayyiya a saman ƙirar. Da yawa, kuma slurry yana gudana, yana haifar da siraran aibobi. Wannan ba wani abu bane da kuka saita sau ɗaya kuma ku manta. Kayan samfurin kakin zuma, yanayin zafinsa, har ma da wakilin sakin da aka yi amfani da shi akan mutu, duk yana shafar shi. Daidaitawa ne akai-akai.
Da bushewa. Busarwar iska ta tilastawa ya zama ruwan dare, amma motsin iska dole ne ya zama laminar, ba tashin hankali ba. Ba kwa son ƙura daga bene (wanda galibi yana cike da kayan stucco na baya) yana shigar da kanta cikin rigar rigar. Mun gina rumfar matsi mai sauƙi don busar da riguna na farko, kuma ƙarancin lahani daga haɗawa ya ragu sosai. Waɗannan su ne marasa kyan gani, cikakkun bayanai masu ƙarfi waɗanda ke raba ingantaccen tsari daga mai rudani.
Harka a cikin Ma'ana: Shell Molds don Complex Geometries
Ɗauki hadaddun simintin gyare-gyare, siraran ruwan wukake, kwane-kwane mai zurfi. Kalubalen ba wai kawai sanya harsashi ya yi ƙarfi ba; yana sanya shi iya jurewa don ba da damar iskar gas su tsere yayin zubowa da ƙonewa. Wannan shine inda tsarin gel ɗin colloidal silica binder shine maɓalli. Idan kun wuce-kwarkwatar slurry don samun dogon aiki, za ku iya yin sulhu da micro-porosity na gel bayan harbe-harbe. Ya zama mai yawa.
Mun yi gwaji tare da ƙara lafiya sosai, sarrafa adadin wakili mai jika da daidaita ma'aunin gelling (yawanci gishiri alkali) don daidaita wannan. Manufar ita ce harsashi wanda ya wuce daidaitattun gwaje-gwajen ƙarfin amma kuma yana da mafi girman iyawar iskar gas. Nasarar ta zo ne ba kawai kallon takardar bayanan mai ɗaure ba, amma daga gudanar da gwaje-gwajen mu'amala da namu akan samfuran harsashi da aka kora. Mun danganta batches slurry daban-daban tare da ainihin sakamakon simintin kayan aikin karfe. Bayanan ba su da kyau, amma yanayin ya bayyana a sarari: ɗan ƙaramin ɗanƙoƙi, wanda aka yi amfani da shi a cikin riguna na farko, ya samar da ingantaccen tsarin kora don waɗannan ɓangarori masu rikitarwa.
Irin wannan matsala shine tushen ci gaba harsashi mold simintin gyaran kafa. Ba littafin karatu ba ne. Yana game da ƙirƙira naku bayanai na ciki na sanadi da sakamako. Kamfani kamar QSY, ƙwararre a cikin simintin gyare-gyare da kuma injinan CNC, wataƙila yana da madaidaicin madauki. Za su iya injin simintin gyare-gyare, ganin lahani na ƙasa daga al'amuran harsashi, kuma su gano shi zuwa takamaiman tsari ko bushewa. Wannan damar da aka haɗa tana da ƙarfi.
Factor The Alloy: Me yasa Material Ke Faɗar Zaɓin Binder
Wannan yana kawo ni ga kayan. Yin aiki tare da simintin ƙarfe shine duniya ɗaya; aiki tare da reactive superalloys wani. Don abubuwan haɗin nickel ko cobalt, harsashi yana buƙatar ba kawai mai ƙarfi ba, har ma da rashin ƙarfi na sinadarai. Ana amfani da refractories high-alumina sau da yawa a cikin riguna na ajiya. Amma mai ɗaure - silica colloidal - shine matrix na duniya wanda ke riƙe da shi gaba ɗaya. Duk wani datti ko rashin zaman lafiya a nan shine yuwuwar gazawar maki a 1500°C+.
Mun taɓa samun matsala game da fashewar laka akan manyan filaye masu lebur na simintin bakin karfe. Harsashi yayi kyau kafin a zuba. Matsalar ita ce rashin daidaituwar haɓakar zafin jiki tsakanin colloidal silica gel da mai jujjuyawa a cikin rigar fuska. Daure kanta tayi wuya bayan ta bushe. Maganin ya haɗa da haɗa ƙaramin kaso na samfurin silica colloidal daban tare da gyare-gyaren ilimin halittar jiki a cikin slurry namu na farko. Ya ƙirƙiri hanyar sadarwar gel mai gafartawa wanda zai iya ɗaukar damuwa na thermal ba tare da fatattaka ba. Wannan ba daidaitaccen tsari bane. Gyaran da aka haifa ne da larura.
Wannan matakin daidaitawar takamaiman kayan abu yana da mahimmanci. A kan Yanar Gizo QSY, suna lissafin aikin su tare da kayan aiki na musamman. Duk wanda ke cikin wannan filin ya san wannan bayanin yana nuna zurfin ɗakin karatu na hannu-kan na sigogin tsari don kowane dangi na kayan aiki. Tsarin silica colloidal na cobalt gami zai sami nuances idan aka kwatanta da na daidaitaccen ƙarfe na carbon. Yana iya zama wata alama ta daban, gauraya daban, ko tsari na slurry mai sarrafawa sosai.
Tunani Na Karshe: Tsari Ne, Ba Sinadari Ba
Don haka, kunsa wannan, mabuɗin ɗaukar hoto colloidal silica zuba jari simintin gyaran kafa shine a daina kallon silica colloidal azaman sinadari kawai da aka saya. Yana da babban ɓangaren tsarin kulawa, mai dogaro da juna. Kakin zuma, yanayin yanayi, fulawa mai jujjuyawa, yashi stucco, ka'idar bushewa, kuma a ƙarshe, ana zuba gawa-duk suna magana da mai ɗaure. Halin mai ɗaure shine hanya gama gari ta ƙarshe.
Haqiqa gwaninta yana cikin fassarar sigina. Canji kaɗan a lokacin slurry magudanar ruwa. Bambanci mai hankali a cikin sheki na busasshiyar gashi. Ƙananan bambancin ƙarfi a cikin yanki na gwaji da aka kori. Waɗannan su ne abubuwan da ke gaya muku idan tsarin ku yana da iko. Yana da tasiri, wani lokacin abin takaici haka. Babu amsa daidai guda ɗaya, kawai amsar da ta dace don takamaiman shagon ku, kayan aikin ku, da cakuda samfuran ku.
Shi ya sa tsawon rai a cikin wannan kasuwancin, kamar tarihin shekaru 30 na kamfani kamar QSY, sigina ce mai inganci. Ma'ana mai yiyuwa ne sun zagaya cikin waɗannan matsalolin, sun sami mafita, kuma sun daidaita hanyoyinsu. Ga duk wanda ke shiga cikin wannan, mutunta tsarin silica colloidal. Zuba hannun jari a auna kayan aiki don sigogin slurry. Shiga komai. Yi shiri don ƙazanta hannuwanku da yin gyare-gyare. Bambanci tsakanin riba da asara shine sau da yawa a cikin ruwan farin madara da yadda kuka zaɓi sarrafa shi.
