Nzira yekuvandudza kupisa kwekushisa kwe kudonhedzwa kunyorera vira lining? Pashure pokuiverenga, ndakabatsirwa zvikuru!

Iyo yakanyanya tembiricha yekushanda kwebindu rechoto inonyanya kuenderana nemuviri, makemikari zvivakwa uye mineral kuumbwa kwezvinhu zvinoramba zvichishandiswa. Pasi pechigadziro chekusarudza iyo mbishi uye yekubatsira zvinhu, iyo sintering maitiro ndiyo kiyi yekuwana yakanaka microstructure yechoto lining kuti ipe kutamba kwakazara kune yayo yakakwirira tembiricha kuramba. Process. Iyo dhigirii ye densification ye lining sintering ine hukama nemakemikari ekuumbwa, particle size reshiyo, sintering process uye sintering tembiricha yezvinhu zvinoramba.

Nzira yekuvaka choto

1. Bvisa mica bepa paunenge uchivaka choto.

2. Ijecha rekristaro requartz rekuvakwa kwechoto rinobatwa sezvinotevera:

(1) Kusarudzwa kwemaoko: kunyanya kubvisa mapundu uye mamwe matsvina;

(2) Magnetic separation: magnetic tsvina inofanira kubviswa zvachose;

3. Dry ramming material: inofanira kuomeswa zvishoma nezvishoma, kupisa kwekuoma kuri 200℃-300℃, uye kuchengetedza kupisa kunopfuura maawa mana.

4. Kusarudzwa kwebinder yepakati pevheji yemagetsi emagetsi: shandisa boric anhydride (B2O3) panzvimbo ye boric acid (H3BO3) sebhainda, uye mari yekuwedzera ndeye 1.1% -1.5%.

Kusarudzwa uye chikamu chemidziyo yekuvaka yevira:

1. Kusarudzwa kwezvinhu zvevira: Zvinofanira kucherechedzwa kuti haasi ose ejecha requartz ane SiO2≥99% anogona kushandiswa se induction furnace lining materials. Chinhu chakakosha hukuru hwequartz crystal grains. Iyo yakanyanya kuomarara tsanga dzekristaro, mashoma mareti akaremara, zviri nani. (Somuenzaniso, crystal quartz jecha SiO2 ine kuchena kwepamusoro, kuchena uye kuoneka kwakajeka.) Iyo yakakura simba revira, rinowedzera zvinodiwa zvezviyo zvekristaro.

2. Chiyero: Chiyero chejecha requartz yehuni yemoto: 6-8 mesh 10% -15%, 10-20 mesh 25% -30%, 20-40 mesh 25% -30%, 270 mesh 25% -30% .

Sintering process uye sintering tembiricha:

1. The knotting of the lining: the knotting quality of the lining yakanangana nemhando ye sintering. Pakurovera, jecha particle size kugovera kwakafanana uye hapana kupatsanurwa kunoitika. Iyo knotted jecha layer ine yakakwira density, uye mukana wekuputika mushure mekunyungudika wakaderedzwa, izvo zvinobatsira kuvandudza hupenyu hwebasa reiyo induction furnace lining.

2. Knotted furnace pasi: Ukobvu hwechoto chepasi hunenge 280mm, uye jecha rinozadzwa muna kana kudzivirira kusaenzana kwese kwese kana manual knotting, uye chigadziko chevira mushure mekubika uye sintering haisi dense. Naizvozvo, kukora kwechikafu kunofanira kunyatsodzorwa. Kazhinji, ukobvu hwejecha rekuzadza haupfuuri 100mm / nguva yega yega, uye madziro echoto anodzorwa mukati me60mm. Vanhu vakawanda vakakamurwa kuita mashift, 4-6 vanhu pashift, uye 30 maminetsi kuti pfundo rega rega ritsive, kutenderedza choto Chengetedza zvishoma nezvishoma uye shandisa zvakaenzana kuti udzivise kuwanda kusina kuenzana.

3. Knotting madziro echoto: ukobvu hwebindu rechoto ndeye 110-120mm, kuwedzera yakaoma knotting zvinhu mumabhechi, jira rakafanana, ukobvu hwekuzadza hahupfuuri 60 mm, uye knotting maminitsi gumi nemashanu (kupfumba nemaoko. ) kusvika yasvika pamwero wepamusoro wering induction pamwe chete. Iyo crucible mold haibudiswe mushure mekunge knotting yapera, uye inoshanda sekudziya kwekupinza panguva yekuomesa uye kunyura.

4. Mabikirwo ekubika uye sintering: Kuti uwane iyo matatu-layer chimiro chechoto chekubikira, iyo yekubikira uye sintering process inogona kukamurwa kuita matanho matatu:

5. Baking stage: kupisa crucible mold kusvika 600 ° C nekukurumidza kwe25 ° C / h uye 50 ° C / h maererano, uye kuichengeta kwe4h, chinangwa ndechokubvisa zvachose unyoro mumucheka wechoto.

6. Semi-sintering stage: kupisa pa50 ° C / h kusvika 900 ° C, kubata kwe3h, kupisa pa 100 ° C / h kusvika 1200 ° C, kubata kwe3h, kupisa kwekushisa kunofanira kudzorwa kudzivirira kuputika.

7. Complete sintering stage: Panguva yekupisa kwepamusoro-kupisa, sintered structure ye intermediate frequency electric furnace crucible ndiyo nheyo yekuvandudza hupenyu hwayo hwebasa. Kupisa kwekupisa kwakasiyana, kuwanda kweiyo sintering layer haina kukwana, uye hupenyu hwebasa hwakaderedzwa zvakanyanya.