Kushandiswa kweFused Corundum Brick muFloat Glass Melting Furnace

Yakasanganiswa corundum zvidhinhayakanyungudutswa alumina muchoto chemagetsi arc uye inokandwa mune yakatsanangurwa modhi yechimiro chakati, yakanyungudutswa uye inochengetedzwa-kupisa, uye yozogadziriswa kuti iwane chigadzirwa chaunoda. Iyo yakajairika yekugadzira maitiro ndeye kushandisa yakakwira-kuchena calcined alumina (pamusoro pe95%) uye zvishoma zvekuwedzera, kuisa izvo zvinongedzo muchoto chemagetsi arc, uye kuzvikanda muforoma dzakagadzirwa mushure mekunyungudutswa pakupisa kwakanyanya pamusoro pe2300 ° C. , uye wozodzichengeta Mushure mekuvhara, inotorwa kunze, uye iyo yakatorwa-kunze isina chinhu inova chigadzirwa chakapedzwa chinosangana nezvinodiwa mushure mekunyatsotonhora kushanda, pre-assembly uye kuongorora.

Fused corundum zvidhinha zvakakamurwa kuva marudzi matatu maererano nemhando dzakasiyana dzekristal uye huwandu hwealumina: yekutanga ndeye α-Al2O3 sechikamu chikuru chekristani, chinonzi α-corundum zvidhinha; yechipiri ndeye α-Al2 The O 3 uye β-Al2O3 crystal phases inonyanya mune zvakafanana zvinyorwa, izvo zvinonzi αβ corundum zvidhinha; mhando yechitatu inonyanya β-Al2O3 crystal phases, inonzi β corundum zvidhinha. Fused corundum zvidhinha zvinowanzoshandiswa mu float glass melting furnaces ndiyo yechipiri uye yechitatu mhando, iyo yakasanganiswa αβ corundum zvidhinha uye β corundum zvidhinha. Ichi chinyorwa chichatarisa pane zvepanyama uye zvemakemikari zvidhinha zvakasanganiswa αβ corundum zvidhinha uye β corundum zvidhinha uye kushandiswa kwavo mu float glass melting furnaces.

1. Kuongororwa kwekuita kwe fused corundum zvidhinha

1. 1 Zvidhinha zvakasanganiswa αβ corundum

Fused αβ corundum zvidhinha zvinoumbwa ne50% α-Al2 O 3 uye β-Al 2 O 3, uye makristasi maviri anopindirana kuti aite dense chimiro, iyo ine yakanakisa yakasimba alkali corrosion resistance. Kudzivirirwa kwekuora pakupisa kwepamusoro (pamusoro pe1350 ° C) kwakashata zvishoma kudarika kwezvidhinha zve AZS zvakasanganiswa, asi pakupisa kwepasi pe1350 ° C, kushorwa kwayo kwegirasi yakanyungudutswa kwakaenzana neiyo yakasanganiswa AZS zvidhinha. Nemhaka yokuti haina Fe2 O 3, TiO 2 nezvimwe zvisina kuchena, chikamu chegirasi rematrix iduku zvikuru, uye zvinhu zvekunze zvakadai semabhubhu hazviite kuti zviitike kana ikasangana negirazi rakanyungudutswa, kuitira kuti girazi rematrix rirege kusvibiswa. .

Fused αβ corundum zvidhinha zvine dense in crystallization uye zvine hunyanzvi hwekuonda girasi yakanyungudutswa pazasi 1350 ° C, saka anoshandiswa zvakanyanya mudziva rekushanda uye mhiri kwegirazi rinonyunguduka mavira, kazhinji mune launders, miromo zvidhinha, gedhi zvidhinha, nezvimwe. Zvidhinha zvakasanganiswa corundum pasi rose zvinogadzirwa zvakanakisa naToshiba wekuJapan.

1.2 Zvidhinha zvakasanganiswa β corundum

Fused β-corundum zvidhinha inoumbwa neinenge 100% β-Al2 O 3, uye ine ndiro yakakura-yakafanana β-Al 2 O 3 crystalline structure. Yakakura uye ine simba shoma. Asi nerumwe rutivi, ine yakanaka spalling kuramba, kunyanya inoratidza yakanyanyisa kuonda kuramba kune yakasimba alkali mhute, saka inoshandiswa muchimiro chepamusoro chegirazi chinonyunguduka choto. Zvisinei, kana inopisa mumhepo ine yakaderera alkali content, ichaita neSiO 2, uye β-Al 2 O 3 inoora nyore nyore uye inokonzera kuderera kwehuwandu kunokonzera kuputika uye kuputika, saka inoshandiswa munzvimbo dziri kure kure. kupararira kwegirazi zvinhu mbishi.

1.3 Zvenyama uye zvemakemikari zvimiro zve fused αβ uye β corundum zvidhinha

Mushonga wemakemikari wefused α-β uye β corundum zvidhinha inonyanya kuAl 2 O 3, musiyano unonyanya mukugadzirwa kwekristal phase, uye kusiyana kwe microstructure kunotungamirira kumutsauko wepanyama uye makemikari zvinhu zvakadai sehuwandu hwehuwandu, kuwedzera kwekushisa. coefficient, uye compressive simba.

2. Kushandiswa kwezvidhinha zvakasanganiswa corundum mumagirazi ekunyunguduka kwevira

Zvose pasi nemadziro edziva zvinosangana zvakananga nemvura yegirazi. Kune ese zvikamu zvinosangana zvakananga negirazi remvura, iyo inonyanya kukosha pfuma yezvinhu zvinoramba ndeyekupokana kwecorrosion, ndiko kuti, hapana kemikari inoitika pakati pezvinhu zvinoramba uye girazi remvura.

Mumakore achangopfuura, kana uchiongorora zviratidzo zvemhando yezvakasanganiswa refractory zvinhu zvakasangana zvakananga negirazi yakanyungudutswa, mukuwedzera kune kemikari, yemuviri uye kemikari zviratidzo, uye kuumbwa kwemaminerari, zvinotevera zvitatu zvinongedzo zvinofanirwa kuongororwa: girazi erosion resistance index, precipitated. bubble index uye precipitated crystallization index.

Nezvinodiwa zvepamusoro zvemhando yegirazi uye hukuru hwekugadzirwa kwechoto, kushandiswa kwezvidhinha zvemagetsi zvakasanganiswa kuchawedzera. Zvidhinha zvakasanganiswa zvinowanzoshandiswa mumagirazi ekunyunguduka kwevira ndeye AZS series (Al 2 O 3 -ZrO 2 -SiO 2 ) zvidhinha zvakasanganiswa. Kana tembiricha yeAZS zvidhinha iri pamusoro pe1350 ℃, kushorwa kwayo kwe2 ~ 5 nguva yea α β -Al 2 O 3 zvidhinha. Fused αβ corundum zvidhinha zvinoumbwa zvakanyatsodzika α-alumina (53%) uye β-alumina (45%) zvimedu zvakanaka, zvine chikamu chiduku chegirasi (inenge 2%), ichizadza pores pakati pemakristasi, nekuchena kwakanyanya, uye inogona kushandiswa seyekutonhora chikamu dziva madziro zvidhinha uye kutonhora chikamu pazasi pavement Zvidhinha uye seam zvidhinha nezvimwe.

Iyo mineral composition of fused αβ corundum zvidhinha inongova nechikamu chiduku chegirasi, iyo isingapindi kunze uye kusvibisa girasi remvura panguva yekushandiswa, uye ine yakanaka yekudzivirira kusagadzikana uye yakanakisa-yepamusoro-tembiricha yekupfeka kusagadzikana pazasi 1350 ° C. Ndiyo iyo kutonhora chikamu chegirazi rinonyunguduka choto. Iyo yakanakira refractory zvinhu kumadziro etangi, matangi ezasi uye machira eanoyangarara magirazi ekunyungudutsa mavira. Mune inoyangarara girazi inonyungudutsa choto cheinjiniya purojekiti, iyo yakasanganiswa αβ corundum zvidhinha inoshandiswa sedziva remadziro zvidhinha zvechikamu chinotonhorera chegirazi rinonyunguduka choto. Mukuwedzera, zvakasanganiswa αβ corundum zvidhinha zvinoshandiswawo pakugadzira zvidhinha uye kuvhara zvidhinha zvakabatana muchikamu chekutonhora.

Fused β corundum brick chigadzirwa chichena chinoumbwa ne β -Al2 O 3 makristasi akaoma, ane 92% ~ 95% Al 2 O 3, inongova pasi pe1% chikamu chegirasi, uye simba rayo rekugadzirisa harina simba nekuda kwekrisiti yakasununguka. . Yakaderera, iyo inooneka porosity iri pasi pe15%. Sezvo Al2O3 pachayo yakazara nesodium pamusoro pe2000 ° C, yakanyatsogadzikana kurwisa alkali mhute pakupisa kwakanyanya, uye kugadzikana kwayo kwekupisa kwakanakisawo. Zvisinei, kana inosangana neSiO 2, Na 2 O iri mu β-Al 2 O 3 inoparara uye inopindirana neSiO2, uye β-Al 2 O 3 inoshandurwa nyore nyore kuva α-Al 2 O 3, zvichiita kuti iwedzere kuwanda. shrinkage, zvichikonzera kutsemuka uye kukanganisa. Naizvozvo, inongo fanirwa kune superstructures kure neSiO2 guruva rinobhururuka, senge superstructure yedziva rinoshanda regirazi rinonyunguduka choto, spout kuseri kwenzvimbo inonyungudika uye parapet yayo iri padyo, diki yevira uye zvimwe zvikamu.

Nekuda kwekuti haaite pamwe nekuvhurika alkali simbi oxides, hapazove neyakanyunguduka inobuda kubva pamusoro pezvidhinha kusvibisa girazi. Muvira regirazi rinonyunguduka muvira, nekuda kwekukurumidza kupfupika kwekupinda kweiyo inoyerera chiteshi chechikamu chekutonhora, zviri nyore kukonzera kunyungudika kwemhepo yealkaline pano, saka chiteshi chekuyerera pano chinogadzirwa neakasanganiswa β zvidhinha zvinopokana. kuora nealkaline steam.

3. Mhedziso

Zvichibva pane zvakanakisa zvidhinha zvakasanganiswa zvecorundum zvidhinha maererano nekuramba kukukurwa kwegirazi, kupikisa furo, uye kuramba kwematombo, kunyanya chimiro chayo chakasarudzika chekristaro, hachimbosvibisa girazi rakanyungudutswa. Pane zvakakosha zvikumbiro mukujekesa bhandi, kutonhora chikamu, mumhanyi, diki choto uye zvimwe zvikamu.