Nā mea hoʻopaʻa ʻino no ka puhi ʻana i nā ʻōpala weliweli Rotary Kiln

Hoʻoheheʻe ʻia nā mea refractory i hoʻohana ʻia i loko o ka umu hoʻoheheʻe ʻōpala weliweli me nā ʻāpana paʻakikī a paʻa ʻole. ʻO ke kumu o ka calcination, ʻo ia ke puhi ʻana i nā ʻōpala weliweli i loko o ka slag a e hoʻemi i ka helu hoʻemi wela o ke koena i lalo o 5%. I ka wā ʻaʻohe ʻōpala i loko o ka umu, ʻokoʻa loa ke ʻano koho refractory o ka umu hoʻoheheʻe ʻōpala weliweli mai ka umu hoʻoheheʻe ʻōpala weliweli.

No nā mea kūpaʻa ʻole i hoʻohana ʻia i loko o ka umu wili no ka mālama ʻana i nā ʻōpala weliweli, he paʻakikī ke ʻano kemika o nā ʻōpala weliweli ma muli o kona ʻano like ʻole, no laila ua hoʻoholo ʻia e puhi ʻia ke ʻano kemika o nā ʻōpala weliweli ma ka mahana 700-1000 i loko o nā umu wili, a ʻo ke ʻano nui o ka hoʻokuʻu ʻia ʻana o ke kinoea ma hope o ka calcination o nā ʻōpala weliweli he waikawa iki.

I loko o ka refractory, he kūpaʻa maikaʻi ka refractory castable i ke kinoea acidic, he kūpaʻa maikaʻi ka AL2O3 SiO2 neoneo rotary kiln a he kūpaʻa maikaʻi hoʻi i ka corrosion a me ka castable refractory. I ke koho ʻana i nā mea refractory, ʻaʻole i koho ʻia nā huahana refractory. ʻO ka nui o ka Fe2O3 ma muli o ka hiki ʻana o Fe2O3 FeCL3 me ke kinoea chlorine, ka pae kinoea, volatile a overbalance i ka brick refractory. Hoʻohana pinepine ʻia ka sima rotary kiln i ke kūpaʻa corrosion o ka huahana palekana kaiapuni Magnesia iron spinel brick. ʻAʻole kūpono ke koho ʻana i nā mea refractory i loko o ka ʻōpala weliweli rotary kiln, i loko o ka ʻōpala weliweli rotary kiln hānai a me ka outlet castable. Pono hoʻi e koho i ka sima haʻahaʻa castable, no ka mea, ʻo ka sima CaO a me ka chlorine reaction, ʻo ka hoʻokumu ʻana o ka pae wai CaC1 e hōʻemi i ke kūpaʻa wela a me ke kūpaʻa wela kiʻekiʻe o ka castable.

I ke koho ʻana i nā mea kūpaʻa ʻole, pono e hoʻohana ka umu ʻōpala weliweli i nā mea kūpaʻa ʻole me ke kūpaʻa maikaʻi o ka ʻaʻahu, ke kūpaʻa o ka haʻalulu wela a me ke kūpaʻa i ka pala. ʻO ke kaʻina hana o ka umu ʻōpala weliweli e hoʻohana maʻamau i ke kaʻina hana puhi ma lalo. Komo ka ʻōpala makani mua o ka wahie mai kekahi ʻaoʻao a he pōkole ka lōʻihi o ka umu (ʻo ka lakio lōʻihi-waena he 3-5m wale nō). He maʻalahi ka hopena i loko o ka umu, ʻo ia hoʻi, ka hopena oxidation combustion. Ma waena o nā huahana nui o kēia manawa, ʻoi aku ka maikaʻi o ka brick mullite sic, a hiki ke koho ʻia ka mea hiki ke hoʻoheheʻe ʻia he mullite.