Alumina birikisi a ɛkorɔn yɛ ade a ɛyɛ hyew a ɛyɛ hyew. ɔhyew a ɛkorɔn som su ahorow a ɛwɔ nneɛma a ɛnyɛ hyew mu no yɛ nneɛma a wɔsusuw wɔ ɔhyew a ɛkorɔn mu, te sɛ: refractoriness, reburning line nsakrae, ɔhyew a ɛyɛ den a ɛko tia, slag resistance, load softening temperature ne creep, etc{2}}} Nneɛma a ɛyɛ hyew.
1. REFRACTORIBLE .
Refractoriness no yɛ su a ɛkyerɛ sɛ nneɛma no yɛ ɔhyew a ɛkɔ soro a ɛko tia nneɛma. raw materials te sɛ mullite, kyanite, Andalusite ne sillimanite hia sɛ wɔsɔ hwɛ ma wɔn refractoriness bere a wɔde di dwuma no na ama wɔate ahotew a ɛwɔ raw nneɛma. sɛ nhwɛso no, efĩ, titiriw wɔn a wɔwɔ flux dwumadi a emu yɛ den no ase, bɛtew refractoriness{2} so{2} so.
Refractoriness susudua kwan: Yɛ refractory raw materials anaa nneɛma ma triangular cones. tenten a ɛwɔ soro base a ɛwɔ triangular cone no yɛ 2mm, ne tenten a ɛwɔ fam no yɛ 8mm, na ne sorokɔ yɛ 30mm. afei wɔde si cone disc koro no ara so sɛ high temperature standard the standard cone to the special Esiane sɛ nsu a ɛyɛ hyew kɛse no pue nti, na ɛkotow kɔ ase denam n’ankasa tumi a ɛtwe ade ba fam. ɔhyew a ɛwɔ cone no atifi a ɛkɔ fam ma ɛne cone disc no di nkitaho no so no yɛ refractoriness{8}} no refractoriness no kyerɛ sɛ wɔde gyinapɛn cone bent wɔ bere koro no ara mu{9}}.
Ɛsɛ sɛ nsonsonoe da refractoriness no ne melting point ne operating temperature no ntam:
(1) Nteaseɛ a ɛwɔ refractoriness ne melting point mu no yɛ soronko. Melting point yɛ equilibrium temperature ma crystal adeɛ baako a ɛyɛ melt firi solid state kɔ nsuo tebea mu{2}} refractoriness no yɛ melting range of a variety of minerals. ɛyɛ nokware
(2) Ɛnsɛ sɛ wɔte refractoriness ase wɔ ɔkwan a ɛnteɛ so efisɛ ɔhyew a wobetumi de nneɛma a ɛyɛ hyew adi dwuma wɔ ɔhyew a ɛkɔ soro mu{1}} efisɛ ayɛ mmerɛw koraa ma mfiri ahoɔden a ɛyera. sɛ nhwɛso no, nneɛma atitiriw a ɛma ahoɔden a ɛyɛ hyew no di kan wɔ ɔhyew a ɛba fam mu esiane nkitahodi fã no nti, ne fã a ɛma nsu no yɛ kɛse no sen nea wɔde di dwuma no so a nea ɛba fam sen biara no yɛ nea ɛyɛ mmerɛw sen nea wɔde yɛ ade no so a ɛyɛ mmerɛw sen nea wɔde di dwuma no so sen nea wɔde yɛ ade no so a ɛyɛ mmerɛw sen nea wɔde yɛ ade no ho a ɛyɛ mmerɛw sen nea wɔde yɛ ade no so. of dɔte birikisi yɛ bɛyɛ 200 ~ 250℃a ɛba fam sen refractoriness.
2. Nsakraeɛ a ɛba wɔ reburning line .
Nsakraeɛ a ɛba berɛ a wɔresan ayɛ no foforɔ no kyerɛ sɛ nhwɛsoɔ no bɛtrɛ anaasɛ ɛbɛtwetwe no wɔ berɛ a wɔayɛ no hyeɛ akɔsi ɔhyeɛ pɔtee bi akyi, wɔde asie berɛ pɔtee bi, na ayɛ nwini akɔ dan mu hyeɛ.
Nsakraeɛ a ɛba rehyew mu no yɛ nsɛnkyerɛnneɛ a ɛho hia a wɔde bɛsɔ nneɛma a ɛyɛ den a ɛyɛ den no ahwɛ no mu baako. Nneɛma a wɔde yɛ adeɛ a ɛtumi dum no dodoɔ ntrɛmu anaa ne ho a ɛtwetwe no akyi no kyerɛ sɛ nneɛma a wɔde yɛ adeɛ a ɛntumi nhyew no nkɔ yie ɛnam ɔhyew a ɛnnɔɔso nti, ɛnnɔɔso a ɛwɔ berɛ a wɔde kura mu anaasɛ ɔhyeɛ a ɛnnɔɔso a ɛboro so wɔ afiri a wɔde yi ano no mu sɛ wɔde afiri a wɔde yiyi nneɛma no mu a, ɛma nsuo no yɛ adwuma{2} no mu no, wɔde kyerɛ sɛ wɔmfa wɔn nsa nka wɔn ho asɛm no mu{2} Sɛ wɔde bedi dwuma wɔ mfiridwuma fononoo mu. esiane ɔhyew a ɛkɔ soro nti, honam fam ne nnuru mu nsakrae bi bɛkɔ so, a ɛbɛma ade no dodow atrɛw anaasɛ ɛbɛtew, na kɛse no bɛyɛ kɛse. nsakrae no ma nsakrae a ɛba wɔ birikisi nkwaa a ɛwɔ fononoo nipadua no mu no mu, na ɛnam so aka sɛnea wɔyɛ no sɛnea ɛte no, sɛnea wɔyɛ no no yɛ nea wɔde wɔn ho hyɛ mu, na wɔde wɔn ho hyɛ nsɛm a ɛyɛ den no mu, ne nea ɛyɛ den no yɛ nea ɛyɛ den a wɔde wɔn ho hyɛ mu, ne nea ɛyɛ den no yɛ nea wɔde wɔn ho hyɛ mu, ne sɛnea wɔde wɔn ho hyɛ mu no yɛ nea wɔde wɔn ho hyɛ mu, na wɔde wɔn ho hyɛ mu no yɛ nea wɔde wɔn ho hyɛ mu, na wɔde wɔn ho hyɛ mu. sɛ ade no refire line no sesa wɔ bo a wɔakyerɛ no mu.
Wɔbu reburning line nsakraeɛ no sɛdeɛ ɛdidi soɔ yi:
3. Ɔhyew a ɛyɛ hu a ɛko tia .
Refractories yɛ nneɛma atitiriw a ɛwɔ mfiridwuma fononoo mu. ɛyɛ nea ɔhyew a wɔde di dwuma no nya so nkɛntɛnso a wontumi nkwati, na ɛtɔ mmere bi a nsakrae a ɛba mpofirim wɔ ɔhyew mu. ɔhyew a ɛyɛ hu a ɛko tia no ka no kyerɛ tumi a refractories tumi gyina ɔhyew nhyɛso a ɛba ntɛmntɛm a ɛnyɛ nea asɛe.
Yɛn man no sɔhwɛ tebea ma nhwɛsode: 1100℃, nsu a ɛyɛ nwini; a wɔda no adi wɔ mmere mu{1}}
Nteaseɛ pii wɔ hɔ a ɛka thermal shock resistance of refractories, enti nsɛmfua pii wɔ hɔ. de abusuabɔ a ɛdidi soɔ yi kyerɛkyerɛ mu tiawa:
Efi atifi hɔ abusuabɔ a ɛnyɛ pɛ (a ɛwɔ atifi hɔ nsusuwii no nsusuw sɛnea nneɛma no te ne ne kɛse, ɔhyew (nwini) tebea horow, mpɔtam hɔ adwennwen a nsakrae a ɛba mpofirim wɔ ɔhyew mu ba, ne nea ɛkeka ho, ne nea ɛkeka ho), yebetumi ahu sɛ ɔhyew a ɛma nneɛma no yɛ hyew a ɛko tia nneɛma no wɔ nneɛma atitiriw a edidi so yi:
(1) modulus a ɛyɛ den a ɛba fam;
(2) linear ntrɛwmu nsusuwii no sua;
(3) mineral titiriw a ɛwɔ refractory ade no mu no wɔ ɔhyew a ɛkɔ soro;
(4) Conjugate no nhyehyɛe ne ne titiriw no fata.
Wɔ nneɛma a wɔde yɛ nneɛma a ɛyɛ hyew a wɔyɛ no mu no, akwan titiriw a wɔfa so ma nneɛma a ɛyɛ hyew a ɛma ɔhyew no ano brɛ ase no tu mpɔn ne nea edidi so yi:
(1) sesa phase composition a ɛwɔ product no mu na ama woanya minerals a ɛntrɛw, anaasɛ superimposition of low-expansion minerals, etc.;
(2) Nneɛma a wɔyɛ no mu a wɔpaw na wɔhwɛ so yiye na ama nneɛma a wɔaka abom no mu nneɛma a wɔahyehyɛ ne ne nhyehyɛe titiriw no ayɛ nea ɛfata, te sɛ micro-cracks a wɔhyehyɛ ne nneɛma nketenkete a ɛkɔ soro wɔ nneɛma bi mu. Table 1 no kyerɛ ntrɛwmu nsusuwii ne nneɛma afoforo a ɛwɔ nneɛma pii a ɛyɛ hyew.
4. CO corrosion a ɛko tia .
There are many types of industrial kilns. Refractory materials in industrial kilns will be subject to various erosions, such as the erosion of molten steel, molten iron, molten slag (acidic or alkaline slag), temperature changes, thermal stress, and atmospheric Changes (especially reducing atmosphere) on the damage of refractory materials, etc. Therefore, refractory materials need to have corresponding characteristics according to Adwumayɛbea a ɛwɔ mfiridwuma mu fononoo mu, a nea ɛka ho ne CO corrosion resistance no yɛ wɔn mu biako.
CO corrosion resistance kyerɛ tumi a refractory nneɛma tumi gyina mpaapaemu anaasɛ mpaapaemu wɔ CO wim. mu bere a refractory product no hyia CO wim tebea a ɛyɛ den wɔ bɛyɛ 500℃(300 ~ 600℃), nnuru a wɔde yɛ ade bɛba 2CO{5}}co{6}} 7}C, ne nea wɔde afiri a wɔde yɛ ade no mu a wɔde nneɛma a wɔde wɔn ho ahyɛ mu a wɔde wɔn ho ahyɛ mu a wɔde wɔn ho ahyɛ mu a wɔde wɔn ho ahyɛ mu no. Smelting process of the blast furnace, the refractory products are cracked and the structure is loose due to the atifi hɔ-a yɛaka ho asɛm wɔ Furnace Body no fã wɔ 400-600℃, a ɛyɛ nneɛma a ɛho hia a ɛma blast fononoo no sɛe no mu biako lining. rescreen the iron oxide content and porose products enhanceory enhanceory enhanceory the enhanceory enhanceory
5. load softening temperature .
Load deformation index of refractory materials at high temperature is expressed by the soft temperature under load. Ɛyɛ ade no a ɛko tia ɔhyew ne adesoa a wɔaka abom no, na ɛsan nso kyerɛ sɛ refractory ade no softening range a ɛkyerɛ sɛ ɛda adi sɛ plastic deformation. saa index yi taa di dwuma sɛ nea wogyina so de kyerɛ ɔhyew a ɛsen biara a ɛwɔ refractory no mu{2}.
Sɛnea load softening temperature index of refractory products kyerɛ no, wobetumi abu no atɛn wɔ saa tebea no mu no refractory no hwere ne nhyɛso-so tumi bere a wɔde di dwuma no, na microstructure a ɛwɔ mu a ɛyɛ refractory no nso betumi asusuw.
6. ɔhyew a ɛkorɔn creep .
Ɔhyew a ɛkorɔn creep agyapade kyerɛ abusuabɔ a ɛda deformation ne bere a refractory nneɛma wɔ daa ɔhyew a ɛkorɔn ne adesoa pɔtee. ɔhyew kɛse creep index ka ahoɔden, ɔhyew ne bere a refractory wɔ ɔhyew a ɛkorɔn, a ɛkyerɛ deformation rate a refractory ade no wɔ ɔhyew ne bere pɔtee bi mu wɔ bere pɔtee bi mu{2}}
atifi hɔ nsɛnkyerɛnne a ɛfa birikisi nneɛma a wɔtaa de di dwuma ho no hia sɛ wosusuw ho. wɔ mfiridwuma mu fononoo ahorow a ɛwɔ ɔhyew a ɛkorɔn mu, esiane nneɛma ahorow a wɔde di dwuma ne adwumayɛ tebea horow nti, nneɛma atitiriw a wɔde kyerɛ biribi a wɔde yɛ birikisi a ɛyɛ hyew wɔ afã horow mu no gyina tebea no so{2}} sɛ nhwɛso no, sɛ wɔde alumina a ɛkorɔn di dwuma a wɔde di dwuma wɔ ɔhyew mu}
