Ubwino Wakuchita kwa Magnesia Carbon Njerwa

Ubwino wa njerwa za carbon magnesia ndi:kukana kukokoloka kwa slag komanso kukana kwamphamvu kwamafuta. M'mbuyomu, kuipa kwa njerwa za MgO-Cr2O3 ndi njerwa za dolomite zinali kuti zidatengera zigawo za slag, zomwe zimapangitsa kuti mamangidwe awonongeke, zomwe zimapangitsa kuwonongeka msanga. Powonjezera graphite, njerwa za carbon magnesia zinathetsa vutoli. Maonekedwe ake ndikuti slag imangolowa m'malo ogwirira ntchito, motero wosanjikiza wokhazikika Pamalo ogwirira ntchito, kapangidwe kake kamakhala kocheperako komanso moyo wautali wautumiki.

Tsopano, kuwonjezera pa njerwa zachikhalidwe za asphalt ndi resin-bond magnesia carbon (kuphatikiza njerwa zowotchedwa ndi mafuta a magnesia),njerwa za carbon magnesia zomwe zimagulitsidwa pamsika zikuphatikizapo:

(1) Magnesia carbon njerwa zopangidwa ndi magnesia munali 96% ~ 97% MgO ndi graphite 94% ~ 95% C;

(2) Magnesia carbon njerwa zopangidwa ndi magnesia munali 97.5% ~ 98.5% MgO ndi graphite 96% ~ 97% C;

(3) Magnesia carbon njerwa zopangidwa ndi magnesia munali 98.5% ~ 99% MgO ndi 98% ~C graphite.

Malinga ndi zomwe zili mu kaboni, njerwa za carbon magnesia zimagawidwa kukhala:

(I) Njerwa zotenthedwa ndi mafuta opangidwa ndi magnesia (za carbon zosakwana 2%);

(2) Njerwa za carbon zomangika ndi magnesia (za carbon zosakwana 7%);

(3) Synthetic utomoni bonded magnesia carbon njerwa (carbon zili 8% ~ 20%, mpaka 25% nthawi zingapo). Ma Antioxidants nthawi zambiri amawonjezedwa ku njerwa za phula / utomoni womangika wa magnesia wa kaboni (mpweya wa kaboni ndi 8% mpaka 20%).

Magnesia carbon njerwa amapangidwa ndi kaphatikizidwe mkulu-kuyera MgO mchenga ndi scaly graphite, mpweya wakuda, etc. Njira kupanga zikuphatikizapo njira zotsatirazi: yaiwisi kuphwanya, screening, grading, kusakaniza molingana ndi zinthu chilinganizo kapangidwe ndi ntchito yokhazikitsa mankhwala, malinga ndi kuphatikiza Kutentha kwa mtundu wa wothandizira kumakwezedwa kufupi ndi 100 ~ 200 ℃, ndipo amaponderezedwa pamodzi ndi binder kuti apeze matope otchedwa MgO-C (kusakaniza kwa thupi lobiriwira). Zinthu zamatope za MgO-C zogwiritsa ntchito utomoni wopangira (makamaka phenolic resin) zimapangidwira pozizira; zinthu zamatope za MgO-C zophatikizidwa ndi phula (kutenthedwa kwamadzimadzi) zimapangidwira pamalo otentha (pafupifupi 100 ° C) kupanga. Malinga ndi kukula kwa batch ndi zofunikira pakuchita kwa zinthu za MgO-C, zida za vacuum vibration, zida zomangira, ma extruder, makina osindikizira a isostatic, makina otentha, zida zotenthetsera, ndi zida za ramming zitha kugwiritsidwa ntchito pokonza zida zamatope za MgO-C. ku mawonekedwe abwino. Thupi lopangidwa ndi MgO-C limayikidwa mu ng'anjo pa 700 ~ 1200 ° C kuti azitha kutentha kuti atembenuzire chomangira kukhala carbon (njirayi imatchedwa carbonization). Pofuna kuonjezera kuchuluka kwa njerwa za carbon magnesia ndikulimbitsa mgwirizano, zodzaza zofanana ndi zomangira zingagwiritsidwenso ntchito kuyika njerwa.

Masiku ano, utomoni wopangira (makamaka phenolic resin) umagwiritsidwa ntchito kwambiri ngati chomangira njerwa za carbon magnesia.Kugwiritsa ntchito njerwa zopangidwa ndi utomoni wa magnesia wa carbon zili ndi ubwino wotsatirawu:

(1) Zinthu zachilengedwe zimalola kukonza ndi kupanga zinthuzi;

(2) Njira yopangira zinthu pansi pamikhalidwe yosakanikirana yozizira imapulumutsa mphamvu;

(3) Mankhwalawa amatha kukonzedwa pansi pazikhalidwe zosachiritsika;

(4) Poyerekeza ndi phula phula binder, palibe gawo pulasitiki;

(5) Kuchulukira kwa kaboni (kuchuluka kwa graphite kapena malasha a bituminous) kumatha kusintha kukana kuvala komanso kukana kwa slag.