Nā Pōmaikaʻi Hana o nā Piliki Kalapona Magnesia

ʻO nā pōmaikaʻi o nā pōhaku kalapona magnesia:ke kūpaʻa ʻana i ka ʻino ʻana o ka slag a me ke kūpaʻa haʻalulu wela maikaʻi. I ka wā ma mua, ʻo ka hemahema o nā piliki MgO-Cr2O3 a me nā piliki dolomite ʻo ia ka omo ʻana i nā ʻāpana slag, e hopena ana i ka spalling structural, e alakaʻi ana i ka hōʻino mua. Ma ka hoʻohui ʻana i ka graphite, ua hoʻopau nā piliki kalapona magnesia i kēia hemahema. ʻO kona ʻano, ʻo ia ka komo wale ʻana o ka slag i loko o ka ʻili hana, no laila ua kaupalena ʻia ka papa hana i ka ʻili hana, ʻoi aku ka liʻiliʻi o ka peeling o ke ʻano a he ola lawelawe lōʻihi.

I kēia manawa, me ka hoʻohui ʻana i nā pōhaku kalapona magnesia asphalt kuʻuna a me ka resin-bonded (me nā pōhaku magnesia i hoʻopiha ʻia me ka ʻaila i puhi ʻia),ʻo nā pōhaku kalapona magnesia i kūʻai ʻia ma ka mākeke e komo pū ana:

(1) Nā piliki kalapona magnesia i hana ʻia me ka magnesia e loaʻa ana he 96% ~ 97% MgO a me ka graphite 94% ~ 95% C;

(2) Nā piliki kalapona magnesia i hana ʻia me ka magnesia e loaʻa ana he 97.5% ~ 98.5% MgO a me ka graphite 96% ~ 97% C;

(3) Nā piliki kalapona magnesia i hana ʻia me ka magnesia e loaʻa ana he 98.5% ~ 99% MgO a me 98% ~ C graphite.

Wahi a ka nui o ke kalapona, ua māhele ʻia nā pōhaku magnesia carbon i:

(I) Nā piliki magnesia i hoʻopiha ʻia me ka ʻaila i puhi ʻia (ʻoi aku ka nui o ke kalapona ma mua o 2%);

(2) Nā piliki magnesia i hoʻopaʻa ʻia me ke kalapona (ʻoi aku ka nui o ke kalapona ma mua o 7%);

(3) Piliki kalapona magnesia i hoʻopaʻa ʻia me ka resin synthetic (ʻo ka nui o ke kalapona he 8% ~ 20%, a hiki i ka 25% i kekahi mau hihia). Hoʻohui pinepine ʻia nā antioxidants i nā piliki kalapona magnesia i hoʻopaʻa ʻia me ka asphalt/resin (ʻo ka nui o ke kalapona he 8% a 20%).

Hana ʻia nā piliki kalapona magnesia ma ka hoʻohui ʻana i ke one MgO maʻemaʻe kiʻekiʻe me ka graphite scaly, carbon black, a pēlā aku. ʻO ke kaʻina hana e pili ana i kēia mau kaʻina hana: ka wāwahi ʻana i nā mea maka, ka kānana ʻana, ka māka ʻana, ka hui ʻana e like me ka hoʻolālā ʻano mea a me ka hana hoʻonohonoho huahana, e like me ka hui ʻana. Hoʻokiʻekiʻe ʻia ka mahana o ke ʻano ʻākena a kokoke i 100 ~ 200 ℃, a kāwili pū ʻia me ka mea hoʻopaʻa e loaʻa ai ka mea i kapa ʻia ʻo MgO-C mud (hui kino ʻōmaʻomaʻo). Hoʻoheheʻe ʻia ka mea lepo MgO-C me ka hoʻohana ʻana i ka resin synthetic (ʻo ia hoʻi ka resin phenolic) i ke ʻano anuanu; hoʻoheheʻe ʻia ka mea lepo MgO-C i hui pū ʻia me ka asphalt (i hoʻomehana ʻia i ke ʻano wai) i ke ʻano wela (ma kahi o 100°C) e hana ana. Wahi a ka nui o ka batch a me nā koi hana o nā huahana MgO-C, hiki ke hoʻohana ʻia nā lako haʻalulu vacuum, nā lako hoʻoheheʻe compression, nā extruders, nā mīkini paʻi isostatic, nā mīkini paʻi wela, nā lako hoʻomehana, a me nā lako ramming e hana i nā mea lepo MgO-C. i ke ʻano kūpono. Hoʻokomo ʻia ke kino MgO-C i hoʻokumu ʻia i loko o kahi umu ahi ma 700 ~ 1200 °C no ka mālama wela ʻana e hoʻololi i ka mea hoʻopaʻa i kalapona (ua kapa ʻia kēia kaʻina hana he carbonization). I mea e hoʻonui ai i ka nui o nā piliki kalapona magnesia a hoʻoikaika i ka hoʻopaʻa ʻana, hiki ke hoʻohana ʻia nā mea hoʻopihapiha e like me nā mea hoʻopaʻa e hoʻokomo i nā piliki.

I kēia mau lā, hoʻohana nui ʻia ka resin synthetic (ʻoi aku ka resin phenolic) ma ke ʻano he mea hoʻopaʻa o nā piliki kalapona magnesia.ʻO nā pono kumu o ka hoʻohana ʻana i nā pōhaku kalapona magnesia i hoʻopaʻa ʻia me ka resin synthetic:

(1) ʻAe nā ʻano kaiapuni i ka hana ʻana a me ka hana ʻana o kēia mau huahana;

(2) Mālama ka hana ʻana i nā huahana ma lalo o nā kūlana kāwili anu i ka ikehu;

(3) Hiki ke hana ʻia ka huahana ma lalo o nā kūlana hoʻōla ʻole;

(4) Ke hoʻohālikelike ʻia me ka mea hoʻopaʻa ʻakika tar, ʻaʻohe pae palaki;

(5) ʻO ka hoʻonui ʻia o ka nui o ke kalapona (ʻoi aku ka nui o ka graphite a i ʻole ka lanahu bituminous) hiki ke hoʻomaikaʻi i ke kūpaʻa ʻana i ka ʻaʻahu a me ke kūpaʻa ʻana i ka slag.