Nkume nke Magnesia alumina

A na-eme brik alumina Magnesia nke magnesia dị elu nke ọma na ihe dịka 8%ezigbo ntụ ntụ Al2O3 ma ọ bụ alumina bauxite dị elu (Al2O3> 78%, SiO2 <20%, obere ego Fe2O3 na adịghị ọcha ndị ọzọ), na-eji sulfite Mkpụrụ mmiri na -ekpofu ahịhịa dị ka ihe nrachi, ngwaahịa alkaline na -emegharị ahụ nke batching, mixing, billeting, drying, firing na usoro ndị ọzọ.

Ọdịnaya magnesium oxide na brik alumina magnesia bụ ihe dịka 85%. Ọdịnaya nke alumina bụ 5% ruo 10%, ihe mgbakwụnye bụ isi na periclase dị ka akụkụ kristal bụ isi na magnesia-aluminum spinel dị ka kristal nke abụọ (dị ka isi njikọta). Porosity pụtara n’ozuzu bụ 15-18%. Ọnụ nke mgbasawanye ọkụ bụ 10.6 × 10-6/° C. Iguzogide ujo ọkụ dị mma karịa brik magnesia kwekọrọ. N’ihi na a na -ekesa spinel magnesium aluminom nke nwere ebe na -agbaze dị elu na matriks, ike ya dị elu dị elu, yana mmalite mmalite nke ịdị nro ibu dị elu karịa 1580 Celsius. Nguzogide slag dịkwa mma. Na mkpokọta, a na-eji magnesia dị elu dị ka ihe na-amị amị, a na-etinyekwa ntụ ntụ dị mma nke nwere magnesia na bauxite ma ọ bụ ọkụ bauxite clinker ma ọ bụ alumina ụlọ ọrụ n’otu oke, a na-enweta ya site na ịgwakọta, akpụ na mgbọ.

1. Enwere ike ịme brik alumina Magnesia site na ịgbakwunye 5-10% Al2O3 na magnesia sintered. A12O3 na -agbakwunye na ntụ ntụ dị mma n’ụdị alumina ụlọ ọrụ mmepụta ihe ma ọ bụ clinker alumina bauxite dị elu.

2. Ọ bụrụ na ewepụtara Al2O3 na ala okwute alumina dị elu, ọ ga -ewebata adịghị ọcha dịka SiO2 n’otu oge, si otú a na -ebelata nrụgharị na ike oke ngwaahịa nke ngwaahịa a. Ya mere, ego aluminom agbakwunyere ekwesịghị ibu oke.

3. Usoro usoro maka imepụta brik alumina magnesia yiri nke ndị magnesia brik. Ọ bụ naanị na ọnọdụ ịgba ọkụ na-adịkarị elu karịa ọkụ ọkụ nke brik magnesia site na 30-50 ° C, na-eru 1750-1800 ° C.

Brik alumina Magnesia nwere njirimara ndị a:

1. Bricks Magnesia alumina nwere nkwụsi ike na-ekpo ọkụ nke ọma ma nwee ike iguzogide mmiri jụrụ oyi maka oge 20-25 ma ọ bụ karịa. Nke a bụ uru ya kacha pụta ìhè. Bricks Magnesia alumina nwere nkwụsi ike dị egwu dị egwu. Abụọ magnesia alumina spinel na periclase bụ nke sistemụ kristal cubic. Mgbasa ọkụ na -aga n’akụkụ akụkụ kristal kristal ọ bụla bụ otu, yabụ ịgbasa na nkwekọrịta bụ ma mgbe ọnọdụ okpomọkụ na -agbanwe. Ọ na -edo karịa ma na -ewepụta obere nrụgide ọkụ.

2. Njirimara nke brik alumina magnesia dịkwa obere ike karịa nke brik magnesia. N’ihi ebe mgbaze dị elu nke magnesia-aluminom spinel n’onwe ya, ibu na-ebelata nro nke brik magnesia-aluminom dị mma karịa nke brik magnesia, na-eru 1620 ～ 1690 ℃.

3. Ihe mejupụtara kemịkalụ nke brik magnesia-aluminom dịgasị iche na akụrụngwa dị iche iche, n’ozuzu MgO> 81%, Al2O3 8.7%, SiO2 <6.0%, CaO <1.5%, Fe2O3 <1.0%.

4. Ihe mejupụtara mineral nke brik alumina magnesia. N’ime ihe mejupụtara ya, kristal bụ periclase, matriks ahụ nwekwara magnesium ferrite, forsterite, forsterite na magnesia spinel.

5. The refractoriness na ibu softening okpomọkụ nke magnesia alumina brik. N’ime brik alumina magnesia, kristal periclase na magnesia alumina spinel na -etolite usoro netwọkụ. Ọ bụ ezie na obere ihe na -agbaze adịghị ọcha na -ejupụta na oghere nke usoro netwọkụ, usoro netwọkụ ka nwere Ọ nwere ikike iguzogide oke ọkụ na ibu, yabụ, nrụgharị na ibu dị nro nke brik magnesia alumina dị elu, refractoriness nwere ike iru 2100 ℃, na ibu nro nro bụ 1570 ℃.

6. Mgbasawanye ọkụ na nkwụsi ike nke brik magnesia-aluminum. N’ihi na ọnụọgụ mgbasa ahịrị nke magnesia-aluminum spinel pere mpe, ọnụọgụ ịgbatị ahịrị nke brik magnesia-aluminom pere mpe. N’ime oke nke 20 ~ 1000 ℃, ọnụọgụ mgbasawanye ahịrị nke brik magnesia alumina bụ naanị 10.6 × 10-6 ℃ -1. N’ihi na magnesia alumina spinel na -ekere òkè n’ịkwalite nguzogide ujo dị ọkụ na brik ahụ, brik magnesia alumina nwere nguzogide ọkụ ọkụ ka mma, ọnụ ọgụgụ mmiri jụrụ oyi karịrị ugboro 20.

7. Nguzogide slag nke brik magnesia-aluminum. N’ihi na brik magnesia-aluminom nwere njupụta dị elu na porosity dị ala, periclase gbara gburugburu magnesia-aluminium spinel, na AI2O3 bụ oxide na-anọpụ iche, yabụ brik magnesia-aluminom Ike iguzogide acid na alkaline slag mbuze siri ike.

Ike nke magnesia alumina brick iji kpuchido irighiri periclase site na mbibi slag siri ike karịa nke forsterite, yabụ a na -ewusi ike nke magnesia alumina brick iji guzogide slag alkaline na iron oxide slag.

Bricks Magnesia-alumina nwere ihe ndị a kpọtụrụ aha n’elu, yabụ ejirila ha mee ihe dị ka ihe eji arụ ụlọ maka elu ọkụ na-agbaze ọkụ dị ka igwe na-eme ka ọkụ na-enwu enwu na ọla na-enwu enwu ọkụ, wee nweta ya. mmetụta nke ịgbatị ndụ nke ọkụ. Nnukwu ọkụ na -emepe emepe nwere ike iru ihe dị ka ọkụ ọkụ 300, na ọkara na obere oghere ọkụ nwere ihe karịrị ọkụ ọkụ 1000.