7 Nā ʻano o ka Corundum Refractory Raw Materials maʻamau i hoʻohana ʻia ma Refractory Castables

01 Sintered Corundum
Sintered corundum, i ʻike ʻia he alumina sintered a i ʻole semi-molten alumina, he clinker refractory i hana ʻia mai ka alumina calcined a i ʻole alumina ʻoihana e like me ka mea maka, ka lepo i loko o nā pōpō a i ʻole nā ​​​​kino ʻōmaʻomaʻo, a hoʻopaʻa ʻia i kahi kiʻekiʻe o 1750 ~ 1900 ° C.

ʻO ka alumina Sintered e loaʻa ana ma mua o 99% o ka alumini oxide i hana nui ʻia me ka corundum i hui pū ʻia. ʻO ka nui o ka hoʻokuʻu kinoea ma lalo o 3.0%, hiki i ka 3.60% / cubic mika, ka refractoriness kokoke i ka helu hoʻoheheʻe o corundum, maikaʻi ka paʻa o ka leo a me ka paʻa kemika i nā mahana kiʻekiʻe, ʻaʻole i hoʻopau ʻia e ka hoʻohaʻahaʻa ʻana i ka lewa, aniani hoʻoheheʻe ʻia a me ka metala hoʻoheheʻe ʻia. , ka ikaika mechanical maikaʻi a me ke kū'ēʻana i ka mahana maʻamau a me ka wela kiʻekiʻe.

02Korundum Huipuia
ʻO Fused corundum he corundum hana i hana ʻia e ka hoʻoheheʻe ʻana i ka pauka alumina maʻemaʻe i loko o kahi umu uila wela. Loaʻa iā ia nā hiʻohiʻona o ka helu hoʻoheheʻe kiʻekiʻe, ka ikaika mechanical kiʻekiʻe, ke kūpaʻa haʻalulu maikaʻi, ke kūpaʻa corrosion ikaika a me ka helu liʻiliʻi liʻiliʻi. ʻO Fused corundum kahi mea maka no ka hana ʻana i nā mea refractory kūikawā kiʻekiʻe. Hoʻokomo nui ʻia ka corundum keʻokeʻo fused, corundum brown fused, corundum sub-white, etc.

03Korundum Keʻokeʻo Hui Pū ʻIa
Hana ʻia ka corundum keʻokeʻo fused mai ka pauka alumina maʻemaʻe a hoʻoheheʻe ʻia i ka wela kiʻekiʻe. He keʻokeʻo ke kala. ʻO ke kaʻina hoʻoheheʻe ʻana o ka corundum keʻokeʻo he hana o ka hoʻoheheʻe ʻana a me ka recrystallization o ka pauka alumina ʻoihana, ʻaʻohe kaʻina hoʻemi. ʻAʻole emi ka Al2O3 ma lalo o 9%, a he liʻiliʻi loa ka ʻike haumia. ʻOi aku ka liʻiliʻi o ka paʻakikī ma mua o ka corundum brown a haʻahaʻa iki ka paʻakikī. Hoʻohana pinepine ʻia e hana i nā mea hana abrasive, nā seramika kūikawā a me nā mea refractory kiʻekiʻe.

04Korundum Palaunu Fused
Hana ʻia ka corundum ʻeleʻele fused mai ka bauxite alumina kiʻekiʻe ma ke ʻano he kumu nui a hui pū ʻia me ka coke (anthracite), a hoʻoheʻe ʻia i loko o kahi umu uila kiʻekiʻe ma nā mahana ma luna o 2000°C. ʻO ka fused brown corundum he ʻano ʻano paʻakikī a me ka paʻakikī kiʻekiʻe a hoʻohana pinepine ʻia i nā seramika, nā hoʻolei pololei a me nā mea refractory holomua.

05Korundum keʻokeʻo
Hoʻokumu ʻia ka subwhite corundum e ka electromelting kūikawā a i ʻole ka bauxite papa mua ma lalo o ka hoʻohaʻahaʻa ʻana i ka lewa a me nā kūlana hoʻomalu. Ke hoʻoheheʻe ʻia, hoʻohui i ka mea hoʻohaʻahaʻa (carbon), settling agent (iron filings) a me decarburizing agent (iron scale). No ka mea, ua kokoke kona haku mele a me kona waiwai kino i ka corundum keʻokeʻo, ua kapa ʻia ʻo ia ka corundum sub-white. ʻOi aku ka nui o kona puʻupuʻu ma luna o 3.80g/cm3 a ʻo kona porosity ʻike ʻia ma lalo o 4%. He mea kūpono ia no ka hana ʻana i nā mea refractory kiʻekiʻe a me nā mea pale lole.

06Chrome corundum
Ma ke kumu o ka corundum keʻokeʻo, ua hoʻohui ʻia ka 22% chromium, a ua hana ʻia e ka hoʻoheheʻe ʻana i loko o ka umu ahi uila. He poni-ulaula ke kala. ʻOi aku ka kiʻekiʻe o ka paʻakikī ma mua o ka corundum brown, e like me ka corundum keʻokeʻo, a hiki i ka microhardness ke 2200-2300Kg / mm2. ʻOi aku ka paʻakikī ma mua o ka corundum keʻokeʻo a haʻahaʻa iki ma mua o ka corundum brown.

07Zirconium Corundum
ʻO Zirconium corundum kahi ʻano corundum artificial i hana ʻia e ka hoʻoheheʻe ʻana i ka alumina a me ka zirconium oxide i ka wela kiʻekiʻe i loko o ka umu uila arc, crystallizing, cooling, crushing and screening. ʻO ka māhele aniani nui o ka zirconium corundum ʻo α-Al2O3, ʻo ka lua aniani ka lua he baddeleyite, a aia kekahi wahi liʻiliʻi o ke aniani. ʻO ka morphology kristal a me ke ʻano o ka zirconium corundum nā mea koʻikoʻi e pili ana i kona maikaʻi. Loaʻa i ka Zirconium corundum nā hiʻohiʻona o ka paʻakikī kiʻekiʻe, ka paʻakikī maikaʻi, ka ikaika kiʻekiʻe, ke ʻano paʻa, ka ikaika wili ikaika, nā waiwai kemika paʻa, a me ke kūpaʻa haʻalulu maikaʻi. Hoʻohana nui ʻia ia i nā ʻoihana abrasives a me nā mea refractory. E like me kona zirconium oxide maʻiʻo, hiki ke māhele ʻia i ʻelua pae huahana: ZA25 a me ZA40.