Singakanani isitini sokufakelwa kwe-mullite?

Uchungechunge lwe-JM lwezitini zokufakelwa kwe-mullite zine-JM26, JM28, JM30, JM32 ngokuya ngezinga lokushisa lokusetshenziswa. Intengo yemakethe yocezu ngalunye ama-yuan ambalwa yuan ngayinye. Intengo izoguquguquka ngokuya ngokuqukethwe kwezinkomba ezahlukahlukene kanye nesidingo. Mayelana ne-mullite Mayelana nezindaba ezihlobene zokuthi singakanani isitini sokufakelwa, inani elithile kufanele linqunywe ngokuhlanganyela ngemva kokubonisana nomkhiqizi we-refractory.

Isitini sokufakelwa kwe-Mullite siyinto ephezulu ye-alumina refractory ene-mullite (3Al2O3 · 2SiO2) njengesigaba sekristalu esiyinhloko. Ngokuvamile, okuqukethwe kwe-alumina kuphakathi kuka-65% no-75%. Ngaphandle kwe-mullite, ukwakheka kwamaminerali kuqukethe inani elincane lesigaba seglasi kanye ne-cristobalite enokuqukethwe kwe-alumina ephansi; okuqukethwe okuphezulu kwe-alumina nakho kuqukethe inani elincane le-corundum. Izitini zokufaka i-mullite zingasetshenziswa ngokuqondile ulwelwesi lwamakhilni ashisa kakhulu, futhi zisetshenziswe kakhulu kumakhilo wokushisha, ama-roller kil, ingilazi kanye nama-petrochemical kilns.

1. Izici zomkhiqizo wezitini zokufakelwa kwe-mullite:

1. I-conductivity ephansi yokushisa kanye nomphumela omuhle wokushisa oshisayo;

2. Okuqukethwe kokungcola okuphansi kunebhokisi lensimbi eliphansi kakhulu lensimbi ye-alkali nokunye okuqukethwe kwe-oxide, ngakho-ke, ukuphikiswa okuphezulu; okuqukethwe okuphezulu kwe-aluminium kuyenza igcine ukusebenza kahle esimweni sokunciphisa;

3. Isitini sokufakelwa kwe-mullite sinokuncibilika okuphansi okushisayo. Ngenxa ye-conductivity ephansi ye-thermal, uchungechunge lwe-mullite lwezitini zokufakelwa kwe-lightweight ziqongelela amandla amancane okushisa, futhi umphumela wokulondoloza amandla ubonakala ekusebenzeni ngezikhathi ezithile;

4. Ubukhulu bokubukeka, ukusheshisa ukwakhiwa kwamatshe, ukunciphisa inani lodaka oluphikisayo, ukuqinisekisa ukuqina nokuzinza kwe-masonry, ngaleyo ndlela kunwetshwe impilo ye-lining;

5. Izitini ze-mullite zokufaka i-mullite zinamandla aphezulu okucindezela okushisa;

6. Izitini zokuhlanganisa i-mullite zingacutshungulwa zibe yizimo ezikhethekile ukunciphisa inani lezitini namajoyinti.

2. Ukuhlelwa kwezitini ze-mullite zokufakelwa:

Ngokwenqubo yayo yokukhiqiza, kunezinhlobo ezimbili zezitini zokufaka i-mullite lightweight: izitini ze-mullite ezihlanganisiwe nezitini ze-mullite ezihlanganisiwe:

1. Izitini ze-mullite ze-sintered zenziwe nge-high-alumina bauxite clinker njengento eluhlaza eyinhloko, enezela inani elincane lobumba noma i-bauxite eluhlaza njenge-ejenti ebophayo, kanye nokwenza nokudubula.

2. Izitini ze-mullite ezihlanganisiwe zenziwe nge-alumina ephezulu, i-alumina yezimboni kanye nobumba obuphikisayo njengezinto zokusetshenziswa, kanye nezinhlayiya zamalahle noma ze-coke zengezwa njengama-ejenti okunciphisa. Ngemuva kokubumba, akhiqizwa ngokunciphisa ukuncibilika kukagesi.

Ukusebenza kanye nokusetshenziswa kwezitini zokufakelwa kwe-mullite: i-refractoriness ephezulu, engafinyelela ngaphezu kwe-1790 ℃. Izinga lokushisa lokuqala lokuthambisa umthwalo ngu-1600℃ 1700℃. Amandla acindezelayo ekamelweni lokushisa ngu-70～260MPa. Ukumelana nokushaqeka okuhle kokushisa. Kunezinhlobo ezimbili zezitini ze-sintered mullite nezitini ze-mullite ezihlanganisiwe. Izitini ze-mullite ze-sintered zenziwe nge-high-alumina bauxite clinker njengento eluhlaza eyinhloko, enezela inani elincane lobumba noma i-bauxite eluhlaza njenge-binder, kanye nokwakheka nokudubula. Izitini ze-mullite ezihlanganisiwe zisebenzisa i-alumina ephezulu, i-alumina yezimboni kanye nobumba oluphikisayo njengezinto zokusetshenziswa, engeza amalahle noma izinhlayiya ezinhle ze-coke njengama-ejenti okunciphisa, futhi akhiqizwa ngendlela yokunciphisa ukuhlanganisa ngemva kokubunjwa. I-crystallization ye-mullite ehlanganisiwe inkulu kune-sintered mullite, futhi ukumelana kwayo nokushaqeka okushisayo kungcono kunokwemikhiqizo e-sintered. Ukusebenza kwabo kokushisa okuphezulu ikakhulukazi kuncike kokuqukethwe kwe-alumina kanye nokufana kwesigaba se-mullite kanye nokusabalalisa kwengilazi. Isetshenziselwa kakhulu isitofu esishisayo esishisayo, umzimba wesithando esiqhumayo kanye naphansi, umshini ovuselela kabusha isithando somlilo esincibilikisa ingilazi, ihnu le-ceramic sintering, ulayini lwesithando somlilo esekhoneni elifile lesistimu yokuqhekeka kwe-petroleum, njll.