Cov txheej txheem ntau lawm ntawm calcium carbide (Cac₂)
Calcium carbide (Cac₂), muaj npe hu uaCarbideLossisPhab Hlau Pob Zeb, Yog feem ntau tsim los ntawm txoj kev lag luam uas muaj kev cuam tshuam txog kev kub ntxhov.
1. Hluav taws xob arc rauv txoj kev (cov txheej txheem nruab nrab muaj)
Lub ntsiab lus
Hauv hom no,Limestone (CaCo₃)ThiabCoke (carbon)Yog reacted nyob rau hauv ib tug hluav taws xob arc ntawm qhov kub ntawm2000-2200 QibCov. Cov tshuaj tiv thaiv tshwm sim hauv ob theem:
Decomposition of Limestone: Cigo₃₃ ca CAO + CO
Txo cov calcium oxide los ntawm carbon: CaO {+3 Celectric Arc Cac₂ + CO
Txheej Txheem Flow
Raw Khoom Npaj:
Zeb(Purity ntau dua lossis sib npaug rau 90%) yog crushed rau ib qho loj me me.
Coek(Cov ntsiab lus siab rau cov ntsiab lus carbon monoxide
Kev sib xyaw:
Limestone thiab coke yog sib xyaw hauv a1: 3 POLLE pivThiab pub rau hauv lub cub tawg.
Kev tiv thaiv kub siab:
Ib qho hluav taws xob tam sim no (200-400 v) ua rau lub arc, cua sov sib xyaw kom sib xyaw kom dhau 2000 degree.
Calcium oxide reacts nrog carbon los ua daim ntawv calcium carbide thiab carbon monoxide (co).
Khoom Tuav Khoom:
Molten calcium carbide yog txias rau pwm los ua cov khoom khov.
CO roj yog qhov cua (nrog txhuam hniav) lossis rov ua dua tshiab.
Qhov Zoo
High efficiency, haum rau loj-ntsuas kev tsim khoom (cov khoom tso thoob ntiaj teb ntau tshaj 100 lab tons).
Raug nqi-ua tau zoo rau kev lag luam-teev acetylene ntau lawm.
Tsis zoo
Tsis tshua muaj zog-intensive (~ 3000-4000 kwh ib tuj ntawm Cac₂).
Yuav tsum muaj cov coke high-purity thiab tsim cov pa roj pov.
2. Kev txo cov cua kub siab carbothermic txo (lab-teev lossis cov txheej txheem tshwj xeeb)
Lub ntsiab lus
Siv Silicon Dioxide (Sio₂) lossis Aluminium ua tus neeg sawv cev txo cov calcium carium oxide:
CaO +3 chigh temp. Cac₂ + CO ↑
lossis
4Co + Al₂o₃hal temp. 2Cac₂ +2 Cae \ cdotpal₂o₃
Txheej Txheem Flow
Kev suav: Limestone yog rhuab los tsim cov roj calcium calcium (cao).
Lus teb pauj ib yam: CaO is mixed with carbon (or silicon/aluminum) and heated in a furnace (>2000 degree).
Kev ntxuav cov khoom: Cov khoom txias txias yog crushed thiab refined rau cais cac₂.
Qhov Zoo
Haum rau kev sim tshuaj schthesis los yog cov khoom lag luam me me.
Tso cai kom meej tswj kev coj dawb huv.
Tsis zoo
Tsawg efficiency thiab cov nqi hluav taws xob siab txwv kev siv.
3. Lwm txoj hauv kev
(1) Carbothermal txo nrog silicon dioxide
Siv cov sio₂ li tus neeg sawv cev txo: 2cao + siio₂ {2}} cδ 2cac₂ + sic {5}}
Tsim calcium carbide thiab silicon carbide (sic) raws li byproduct.
(2) Electrode rauv nrog gaseous carbon chaw
Sim cov qauv siv methane (ch meth) raws li cov pa roj carbon ntau: caO t₄₄ cac₂ {{1} h₂↑
Tseem nyob rau hauv kev tshawb fawb theem vim yog cov kev sib tw ua haujlwm.
(3) bio-txo (sim)
Siv cov kab mob me me kom txo cov caco₃ mus rau Caco₃, tab sis Scalability tsawg.
