Configuring 5% mus rau 10% (loj feem) Al2O3 nyob rau hauv lub matrix ib feem ntawm blast furnace carbon / graphite bricks (carbon blocks) ho txhim kho corrosion kuj ntawm molten hlau thiab yog daim ntawv thov ntawm txhuas carbon cib nyob rau hauv ironmaking systems. Thib ob, aluminium carbon cib kuj siv rau hauv cov hlau molten pretreatment thiab kais troughs.
Aluminium carbon bricks rau molten hlau pretreatment
Aluminium silicon carbide cib feem ntau yog siv rau hauv cov khoom siv thauj cov hlau molten xws li molten hlau tso tsheb hlau luam. Txawm li cas los xij, thaum cov khoom siv refractory no siv rau hauv cov hlau molten loj thiab cov hlau sib tov, thiab ntsib cov cua sov hnyav thiab txias txias, nws yuav ua rau tawg, ua rau cov txheej txheem tev tawm. Tsis tas li ntawd, vim hais tias Al2O3-SiC-C cib siv nyob rau hauv cov kub kub hlau tso tsheb hlau luam thiab hlau mixers feem ntau muaj cov ntsiab lus carbon ntawm 15% thiab thermal conductivity siab li 17 ~ 21W / (m·K) (800 ℃), muaj yog ib qho kev txo qhov kub ntawm cov hlau molten thiab qhov teeb meem ntawm deforming cov ntawv hlau ntawm cov hlau molten loj thiab cov tsheb sib xyaw. Qhov kev ntsuas yog kom ua tiav cov thermal conductivity tsawg los ntawm kev tshem tawm SiC, cov khoom siv hluav taws xob zoo heev, thaum txo cov ntsiab lus graphite thiab kho cov graphite.
Los ntawm kev tshawb fawb hauv paus, nws xaus lus tias:
(1) Thaum cov ntsiab lus graphite (feem ntau) hauv aluminium carbon bricks tsawg dua 10%, nws cov qauv tsim muaj Al2O3 tsim cov matrix tas mus li, thiab cov pa roj carbon tau ntim rau hauv cov matrix hauv daim ntawv ntawm cov ntsiab lus hnub qub. Lub sijhawm no, thermal conductivity λ ntawm aluminium carbon cib tuaj yeem kwv yees kwv yees los ntawm cov mis (1)
Hauv cov mis, λa yog thermal conductivity ntawm Al2O3; Vc yog qhov ntim feem ntawm graphite. Qhov no qhia tau hais tias thermal conductivity ntawm aluminium carbon cib tsis muaj dab tsi ua nrog thermal conductivity ntawm graphite.
(2) Thaum lub graphite yog refined, thermal conductivity ntawm aluminium carbon cib muaj tsawg dependence rau graphite hais.
(3) Rau qis-carbon aluminium-carbon bricks, thaum lub graphite yog refined, ib tug ntom bonding matrix tuaj yeem tsim, uas tuaj yeem txhim kho corrosion kuj ntawm aluminium-carbon bricks.
Qhov no qhia tau hais tias cov pa roj carbon tsawg A aluminium carbon cib tuaj yeem hloov mus rau kev ua haujlwm ntawm cov hlau kub loj thiab cov tsheb sib xyaw hlau hauv cov hlau ua hlau.
cov
Post lub sij hawm: Feb-27-2024
