Gyara yashi yumbu a cikin tsarin yashi mai rufi

Bisa ga ƙididdiga da ƙididdiga, aikin simintin yashi yashi yana buƙatar matsakaicin tan 0.6-1 na yashi mai rufi (core) don samar da tan 1 na simintin gyare-gyare. Ta wannan hanyar, maganin yashi da aka yi amfani da shi ya zama hanya mafi mahimmanci a cikin wannan tsari. Wannan ba wai kawai bukatar rage farashin masana'antu ba ne da inganta fa'idar tattalin arziki ba, har ma da bukatar rage fitar da hayaki, da tabbatar da tattalin arzikin da'ira, da rayuwa cikin jituwa da muhalli, da samun ci gaba mai dorewa.

Manufar reclamation na rufi yumbu yashi ne don cire ragowar guduro fim mai rufi a saman da yashi hatsi, da kuma a lokaci guda cire ragowar karfe da sauran ƙazanta a cikin tsohon yashi. Wadannan ragowar suna da matukar tasiri ga ƙarfi da taurin yashin yumbu mai rufi da aka dawo da su, kuma a lokaci guda suna ƙara yawan samar da iskar gas da yuwuwar samar da kayan sharar gida. Abubuwan da ake buƙata don yashi da aka kwato su ne gabaɗaya: hasara akan ƙonewa (LOI) <0.3% (ko samar da iskar gas <0.5ml/g), da kuma aikin yashi da aka kwato wanda ya dace da wannan ma'auni bayan rufewa bai bambanta da sabon yashi ba.

Yashi mai rufi yana amfani da resin phenolic thermoplastic a matsayin mai ɗaure, kuma fim ɗin guduro yana da ɗan tauri. A ka'idar, duka hanyoyin thermal da na inji na iya cire ragowar fim ɗin guduro. Farfadowar thermal yana amfani da tsarin carbonization na fim ɗin resin a babban zafin jiki, wanda shine mafi isasshe kuma ingantaccen hanyar farfadowa.

Game da tsarin gyaran zafin jiki na yashi yumbu mai rufi, cibiyoyin bincike da wasu masana'antun sun gudanar da bincike mai yawa na gwaji. A halin yanzu, ana yin amfani da tsari mai zuwa. Zafin tanderun da ake gasawa shine 700°C-750°C, kuma zafin yashi shine 650°C-700°C. Tsarin sake fasalin gabaɗaya shine:

(Murkushe rawar jiki) →Maɗaukakin maganadisu → sharar da yashi preheating → (guga lif) → (screw feeder) → Maido da yashi hopper → tafasasshen ruwa → tafasasshen sanyaya gado → tsarin kawar da kura → core yashi foda → hopper Dagawa hoist → flue gas fitarwa → sharar yashi → ruwa mai gasa tanderu → matsakaiciyar guga yashi → layin samar da yashi mai rufi

Dangane da abin da ya shafi kayan aikin gyaran yashi na yumbura, ana amfani da gyaran zafi gabaɗaya. Hanyoyin makamashi sun haɗa da wutar lantarki, gas, coal (coke), man biomass, da dai sauransu, kuma hanyoyin musayar zafi sun haɗa da nau'in lamba da nau'in tafasar iska. Baya ga wasu sanannun manyan kamfanoni masu manyan kayan aikin sake amfani da su, ƙananan kamfanoni da yawa kuma suna da na'urorin sake amfani da fasaha da yawa da aka gina da kansu.