He hua hinu totoka pango, hina pouri rānei te kōka hinu, he kanapa whakarewa, he pūangi hoki.

Ko ngā wāhanga o te kōka hinu he warowaihā, kei roto ko te 90-97% waro, 1.5-8% hauwai, hauota, māota, whanariki me ngā matū whakarewa taumaha. Ko te kōka hinu he hua taha o te whakakorikori o te hinu whāngai i roto i ngā wae kōka whakaroa i ngā pāmahana teitei hei whakaputa hua hinu māmā. Ko te putanga o te kōka hinu he tata ki te 25-30% o te hinu mata. Ko tōna uara wera iti he tata ki te 1.5-2 ngā wā o te waro, kāore te ihirangi pungarehu i neke atu i te 0.5%, ko te mea pupuhi he tata ki te 11%, ā, he tata te kounga ki te anthracite. E ai ki te hanganga me te āhua o te kōka hinu, ka taea te wehewehe i ngā hua kōka hinu ki ngā momo e 4: kōka ngira, kōka hautai, kōka pere me te kōka paura:

(1) Ko te ngira kōka, he rite ki te ngira te hanganga me te kakano muka, e whakamahia ana hei hiko karāti kaha-teitei me te kaha-tino-teitei i roto i te hanga maitai. Nā te mea he tino kaha ngā whakaritenga kounga mō te ngira kōka e pā ana ki te ihirangi whanariki, te ihirangi pungarehu, te matū pupuhi me te mātotoru pono, he whakaritenga motuhake mō te hangarau hanga ngira kōka me ngā rauemi mata.

(2) Ko te kōka hautai, he nui te tauhohenga matū me te iti o te poke, e whakamahia ana i roto i te umanga whakarewa konumohe me te umanga waro.

(3) Kōka porowhita, kōka porowhita rānei: He porowhita te āhua, ā, he 0.6-30mm te whānui. I te nuinga o te wā ka hangaia mai i te hinu toenga he nui te whanariki me te nui te uku, ā, ka taea anake te whakamahi hei wahie ahumahi pēnei i te whakaputa hiko me te sima.

(4) Koka paura: Ka hangaia mā te tukanga koka wai, he iti ngā matūriki (0.1-0.4mm te whānui), he nui te ihirangi pūngāwerewere, ā, he nui te tauwehenga whānui wera, nō reira kāore e taea te whakamahi tika i roto i te whakarite hiko me te umanga waro.

E ai ki te nui o te whanariki, ka taea te wehewehe ki te kōke whanariki teitei (kei runga ake i te 3%) te nui o te whanariki me te kōke whanariki iti (kei raro iho i te 3%) te nui o te whanariki. Ka taea te whakamahi i te kōke whanariki iti hei whakapiri anode me ngā anode kua tunua mō ngā tipu konumohe, hei irahiko karāpeti mō ngā tipu maitai. I roto i ēnei, ka taea te whakamahi i te kōke whanariki iti kounga teitei (kei raro iho i te 0.5%) hei hanga i ngā irahiko karāpeti me ngā whakarei waro. He maha ngā wā ka whakamahia te kōke whanariki iti o te kounga whānui (iti iho i te 1.5% te nui o te whanariki) hei hanga i ngā anode kua tunua. Ko te kōke hinu kounga iti te nuinga e whakamahia ana mō te whakarewa i te silicon ahumahi me te hanga whakapiri anode. Ko te kōke whanariki teitei te nuinga e whakamahia ana hei wahie i roto i ngā tipu sima me ngā tipu hiko.

Kōka Hinu Whakarewahia:

Mō ngā irahiko karāpiti mō te hanga maitai, ngā whakapiri anode rānei (ngā irahiko whakarewa) mō te hanga konumohe me te konupora, kia taea ai te whakarerekē i te kōka hinu (kōka matomato) ki ngā whakaritenga, me whakapūkara te kōka matomato. Ko te pāmahana whakapūkara he tata ki te 1300 °C, ko te kaupapa he tango i ngā wāhanga pūngāwerewere o te kōka hinu i te mea ka taea. Mā tēnei, ka taea te whakaiti i te nui o te hauwai o te kōka hinu hangarua, ā, ka taea te whakapai ake i te taumata whakapūkara o te kōka hinu, kia pai ake ai te kaha pāmahana teitei me te ātete wera o te irahiko karāpiti, me te whakapai ake i te kawe hiko o te irahiko karāpiti. Ko te kōka whakapūkara te nuinga o te wā e whakamahia ana i roto i te hanga i ngā irahiko karāpiti, ngā hua whakapiri waro, te onepu taimana, te ahumahi whākawa kai, te ahumahi whakarewa me te konupūmā kāpirati, i roto i ēnei ko ngā irahiko karāpiti te mea tino whānuitia te whakamahi. Ka taea te whakamahi tika i te kōka matomato mō te konupūmā kāpirati hei rauemi matua mō te konupūmā kāpirati me te kore whakapūkara, me te hanga i te kapirati silicon me te boron kāpirati hei rauemi whakakoi. Ka taea hoki te whakamahi tika hei kōka mō te oumu pupuhi i roto i te umanga whakarewa, hei pereki waro rānei mō te arai pakitara oumu pupuhi, ā, ka taea hoki te whakamahi hei kōka matotoru mō te tukanga whakarewa.