Ukuhlaziywa okusha komgomo wokumunca ukushisa we-silicon carbide graphite crucible

1. Izinto ezibonakalayo kanye nesakhiwo

i-silicon carbide graphite crucible icwengwa ngezinto ezifana ne-graphite ne-silicon carbide ngokusebenzisa izinqubo eziyinkimbinkimbi, ehlanganisa izakhiwo zabo ezinhle kakhulu. Izici eziyinhloko ze-graphite zifaka:

 

I-electrical conductivity ne-thermal conductivity: I-graphite ine-conductivity enhle kagesi kanye ne-thermal, eyivumela ukuthi idlulise ukushisa ngokushesha futhi inciphise ukulahlekelwa kwamandla ezindaweni zokushisa okuphezulu.

Ukuzinza Kwamakhemikhali: I-graphite ihlala izinzile futhi imelana nokusabela kwamakhemikhali ezindaweni eziningi ezine-asidi ne-alkali.

Ukumelana nezinga lokushisa eliphezulu: I-Graphite ingakwazi ukugcina ubuqotho besakhiwo isikhathi eside ezindaweni ezishisayo ngaphandle kwezinguquko eziphawulekayo ngenxa yokwanda okushisayo noma ukufinyela.

Izakhiwo eziyinhloko ze-silicon carbide zihlanganisa:

 

Amandla omshini: I-silicon carbide inobulukhuni obuphezulu namandla emishini, futhi imelana nokugqokwa kwemishini nomthelela.

Ukumelana nokugqwala: Ikhombisa ukumelana nokugqwala okuhle kakhulu emazingeni okushisa aphezulu kanye ne-corrosion atmosphere.

Ukuzinza okushisayo: I-Silicon carbide ingagcina izakhiwo ezinzile zamakhemikhali nezomzimba ezindaweni ezishisa kakhulu.

Inhlanganisela yalezi zinto ezimbili kudalai-silicon carbide graphite crucibles, ezinokumelana nokushisa okuphezulu, i-thermal conductivity enhle kakhulu kanye nokuzinza okuhle kwamakhemikhali, okwenza kube kuhle ekusetshenzisweni kokushisa okuphezulu.

 

2. Ukusabela kwamakhemikhali kanye nomshini we-endothermic

i-silicon carbide graphite crucible ibhekana nochungechunge lokusabela kwamakhemikhali endaweni yokushisa ephezulu, engabonisi nje kuphela ukusebenza kwempahla e-crucible, kodwa futhi ingumthombo obalulekile wokusebenza kwayo kokumunca ukushisa. Ukusabela okukhulu kwamakhemikhali kuhlanganisa:

 

Ukusabela kwe-redox: I-metal oxide ihlangana nento enciphisayo (njengekhabhoni) ku-crucible, ikhiphe inani elikhulu lokushisa. Isibonelo, i-iron oxide ihlangana ne-carbon yakhe i-iron ne-carbon dioxide:

 

I-Fe2O3 + 3C→2Fe + 3CO

Ukushisa okukhishwe yilokhu kusabela kudonswa yi-crucible, kukhuphule izinga lokushisa layo lonke.

 

Ukusabela kwe-Pyrolysis: Emazingeni okushisa aphezulu, izinto ezithile zibhekana nokubola okukhiqiza ama-molecule amancane futhi kukhulule ukushisa. Isibonelo, i-calcium carbonate ibola emazingeni okushisa aphezulu ukuze ikhiqize i-calcium oxide ne-carbon dioxide:

 

I-CaCO3→I-CaO + CO2

Lokhu kusabela kwe-pyrolysis nakho kukhulula ukushisa, okumuncwa yi-crucible.

 

Ukusabela komusi: Umhwamuko wamanzi uhlangana nekhabhoni emazingeni okushisa aphezulu ukukhiqiza i-hydrogen ne-carbon monoxide:

 

H2O + C→I-H2 + CO

Ukushisa okukhishwe yilokhu kusabela nakho kusetshenziswa i-crucible.

 

Ukushisa okukhiqizwa yilokhu kusabela kwamakhemikhali kuyindlela ebalulekilei-silicon carbide graphite crucible ukumunca ukushisa, ukuyivumela ukuthi imunce kahle futhi idlulise amandla okushisa phakathi nenqubo yokushisisa.

 

ezintathu. Ukuhlaziywa okujulile kwesimiso sokusebenza

Umgomo wokusebenza wei-silicon carbide graphite crucible ayinciki nje kuphela ezintweni ezibonakalayo zezinto ezibonakalayo, kodwa futhi incike kakhulu ekusetshenzisweni ngempumelelo kwamandla okushisa ngokusabela kwamakhemikhali. Inqubo ethize imi kanje:

 

I-Heating crucible: Umthombo wokushisa wangaphandle ushisisa i-crucible, futhi izinto ze-graphite ne-silicon carbide ngaphakathi zimunca ukushisa futhi zifinyelele amazinga okushisa aphezulu.

 

I-Chemical reaction endothermic: Emazingeni okushisa aphezulu, ukusabela kwamakhemikhali (okufana nokusabela kwe-redox, ukusabela kwe-pyrolysis, ukusabela kwesitimu, njll.) kwenzeka ngaphakathi kwe-crucible, kukhulula inani elikhulu lamandla okushisa, elimuncwa izinto ezihlabayo.

 

I-Thermal conductivity: Ngenxa yokushisa okuhle kakhulu kwe-graphite, ukushisa ku-crucible kuqhutshwa ngokushesha ezintweni ezise-crucible, okwenza izinga lokushisa layo likhuphuke ngokushesha.

 

Ukushisa okuqhubekayo: Njengoba ukusabela kwamakhemikhali kuqhubeka futhi ukufudumeza kwangaphandle kuqhubeka, i-crucible ingagcina izinga lokushisa eliphezulu futhi inikeze umfudlana oqhubekayo wamandla okushisa ezintweni eziku-crucible.

 

Lokhu kuqhutshwa kokushisa okusebenzayo kanye nendlela yokusebenzisa amandla okushisa kuqinisekisa ukusebenza okuphezului-silicon carbide graphite crucible ngaphansi kwezimo zokushisa eziphezulu. Le nqubo ayigcini nje ukuthuthukisa ukusebenza kahle kokushisa kwe-crucible, kodwa futhi inciphisa ukulahlekelwa kwamandla, okwenza ukuthi yenze kahle kakhulu ekukhiqizeni izimboni.

 

Ezine. Izinhlelo zokusebenza ezintsha nezikhombisi-ndlela zokuthuthukisa

Ukusebenza okuphezulu kwei-silicon carbide graphite crucible ekusetshenzisweni okungokoqobo ikakhulukazi kusekusetshenzisweni kwayo ngempumelelo kwamandla ashisayo kanye nokuzinza kwempahla. Okulandelayo ezinye izinhlelo zokusebenza ezintsha nezikhombisi-ndlela zokuthuthukisa zesikhathi esizayo:

 

Ukuncibilikiswa kwensimbi okunezinga lokushisa eliphezulu: Enqubweni yokuncibilikisa insimbi enezinga lokushisa eliphezulu,i-silicon carbide graphite crucible ingathuthukisa ngempumelelo isivinini sokuncibilikisa kanye nekhwalithi. Isibonelo, ekuncibilikisweni kwensimbi encibilikisiwe, ithusi, i-aluminium nezinye izinsimbi, ukuguquguquka okuphezulu kwe-thermal kwe-crucible kanye nokumelana nokugqwala kuyenza ikwazi ukumelana nomthelela wensimbi encibilikisiwe yezinga eliphezulu lokushisa, iqinisekisa ukuzinza nokuphepha kwenqubo yokuncibilikisa.

 

Umkhumbi we-high-temperature chemical reaction:i-silicon carbide graphite crucible ingasetshenziswa njengesiqukathi esifanelekile sokusabela kwamakhemikhali okushisa okuphezulu. Isibonelo, embonini yamakhemikhali, ukusabela okuthile kokushisa okuphezulu kudinga imikhumbi ezinzile futhi ekwazi ukumelana nokugqwala, kanye nezici zei-silicon carbide graphite crucibleihlangabezana ngokugcwele nalezi zidingo.

 

Ukuthuthukiswa kwezinto ezintsha: Ocwaningweni nasekuthuthukisweni kwezinto ezintsha,i-silicon carbide graphite crucible ingasetshenziswa njengemishini eyisisekelo yokucubungula izinga lokushisa eliphezulu kanye nokuhlanganisa. Ukusebenza kwayo okuzinzile kanye nokusebenza kahle kwe-thermal kunikeza indawo yokuhlola efanelekile futhi kukhuthaze ukuthuthukiswa kwezinto ezintsha.

 

Ubuchwepheshe bokonga amandla kanye nokunciphisa ukungcola: Ngokuthuthukisa izimo zokusabela kwamakhemikhali zei-silicon carbide graphite crucible, ukusebenza kahle kwayo kokushisa kungathuthukiswa futhi ukusetshenziswa kwamandla kuncishiswe. Isibonelo, ukwethulwa kwama-catalysts ku-crucible kufundwa ukuze kuthuthukiswe ukusebenza kahle kokusabela kwe-redox, ngaleyo ndlela kuncishiswe isikhathi sokushisa nokusetshenziswa kwamandla.

 

Ukuhlanganiswa kwezinto kanye nokuguqulwa: Ukuhlanganiswa nezinye izinto ezisebenza kahle kakhulu, njengokwengeza imicu ye-ceramic noma ama-nanomaterials, kungathuthukisa ukumelana nokushisa namandla emishini kagesi.i-silicon carbide graphite crucibles. Ukwengeza, ngezinqubo zokuguqula ezifana nokwelashwa kokumboza phezulu, ukumelana nokugqwala kanye nokusebenza kahle kwe-thermal conductivity ye-crucible kungathuthukiswa nakakhulu.

 

5. Isiphetho namathemba esikhathi esizayo

Umgomo we-endothermic wei-silicon carbide graphite crucible ukusetshenziswa kahle kwamandla okushisa okusekelwe ezintweni zawo ezibonakalayo kanye nokusabela kwamakhemikhali. Ukuqonda kanye nokwenza kahle lezi zimiso kubaluleke kakhulu ekuthuthukiseni ukusebenza kahle kokukhiqizwa kwezimboni kanye nocwaningo lwempahla. Ngokuzayo, ngokuthuthuka okuqhubekayo kobuchwepheshe kanye nokuthuthukiswa okuqhubekayo kwezinto ezintsha,i-silicon carbide graphite cruciblekulindeleke ukuthi zibambe iqhaza elibalulekile ezindaweni ezinokushisa okuphezulu.

 

Ngokuqhubeka nokusungula izinto ezintsha kanye nokwenza kahle,i-silicon carbide graphite crucible izoqhubeka nokwenza ngcono ukusebenza kwayo futhi iqhubekisele phambili ukuthuthukiswa kwezimboni ezihlobene. Ekuncibilikisweni kwensimbi okunezinga lokushisa eliphezulu, ukusabela kwamakhemikhali ezinga lokushisa eliphezulu, nokuthuthukiswa kwezinto ezintsha,i-silicon carbide graphite crucible izoba yithuluzi elibalulekile, elisiza imboni yesimanje kanye nocwaningo lwesayensi ukuthi lufinyelele izinga eliphezulu.