Nws yog feem ntau ntseeg hais tias cov tshuaj tiv thaiv ntawm smelting calcium silicon alloy yog qhia raws li nram no
CaO+SiO2+3C→CaSi+3CO↑
Txawm li cas los xij, thaum kub kub txiv qaub thiab silica thawj daim ntawv calcium silicate slag nrog lub melting point uas tsis tshua muaj melting point, ua rau nws nyuaj rau nqa tawm cov pa roj carbon txo cov tshuaj tiv thaiv. Calcium muaj qhov kub siab qis thiab yooj yim volatilized los tsim calcium vapor. Thiab SiO2 raug txo rau SiO (gas), yog li cov pa tawm ntawm qhov cub rau CO, Ca (gas) thiab SiO (gas). Calcium thiab silicon nyob rau hauv lub cub tawg gas poob txog 10% txhua. SiO (gas) thiab Ca (gas) los ntawm cov khoom txheej nrog cov tshuaj tiv thaiv carbon, feem ntau ntawm kev hloov mus rau CaC2 thiab SiC, yog li cov carbonaceous reductant ntawm reactivity ntawm smelting ntawm calcium -silicon alloy yog ib qho tseem ceeb. Calcium oxide thiab silica nrog carbon ntawm qhov kub thiab txias los tsim CaC2 thiab SiC, yog cov khoom siv calcium silicon alloy intermediate khoom. Nws thiaj li qee tus ntawm lawv nyob hauv cov slag, yog li calcium silicate alloy ntau lawm yog slag smelting. Kev lag luam ntau ntawm calcium silicate alloys tau pom zoo nrog CaC2 ua cov khoom hloov pauv. Calcium silicon alloy ntom yog me ntsis me dua cov slag, smelting txheej txheem calcium silicon alloy yog qhov tseem ceeb nyob rau hauv sab sauv ntawm lub molten pas dej ua ke, uas yog cov yam ntxwv ntawm smelting calcium silicon alloy. Kev ntsuas tshwj xeeb yuav tsum tau muab cais tawm ntawm cov slag thaum nws tawm ntawm lub qhov cub. Raws li kev soj ntsuam saum toj no, muaj peb hom txheej txheem rau smelting calcium silica alloy los ntawm electro-carbon heat (txo) txoj kev, uas yog, sib tov them txoj kev, txheej txheej them thiab calcium carbide txoj kev. Electrosilicon thermal (txo) txoj kev kuj yog ib txoj hauv kev los tsim calcium silica alloy.
Mixed Charging Method
Kuj tseem hu ua ib txoj hauv kev - kauj ruam. Silica, txiv qaub, carbonaceous txo tus neeg sawv cev (xws li coke, charcoal, bituminous thee, wood blocks) yog sib tov zoo nyob rau hauv xam proportions thiab ces ntxiv rau hauv lub cub hluav taws xob. The synthesized reaction is CaO+SiO2+3C==CaSi+3CO↑
Vim CaO thiab SiO2 yooj yim los tsim cov ntsiab lus melting tsawg calcium silicate slag, tsawg melting pas dej ua ke kub, yog li hais tias cov saum toj no txo cov tshuaj tiv thaiv yog ib qho nyuaj rau nqa tawm. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau nce cov pa roj carbon monoxide (10% mus rau 30% siab tshaj qhov ntsuas tus nqi), kom lub cim ntawm CaC2 thiab SiC yaj nyob rau hauv slag, txhawm rau txhim kho lub melting point ntawm slag thiab viscosity, kom lub smelting pas dej ua ke mus txog qhov kub thiab txias yuav tsum tau rau cov tshuaj tiv thaiv. Txawm li cas los xij, tiam sis ntawm SiC thiab CaC2, kom cov hauv qab ntawm lub cub tawg nce thiab lub cub tawg phab ntsa, koj tuaj yeem ntxiv silica los rhuav tshem cov carbide, thiab tau txais cov hlau. Nws cov tshuaj tiv thaiv mis yog
CaC2+SiO2==CaSi+2CO↑
2SiC+SiO2==3Si+2CO↑
Cov tshuaj tiv thaiv saum toj no yuav tsum tau nqa tawm ntawm qhov kub siab (txog 2000℃lossis siab dua). Qhov kub siab dua, nws yooj yim dua los rhuav tshem cov carbide, qhov tsawg carbide tseem nyob hauv qhov cub, uas yog qhov tsim nyog rau tiam ntawm cov alloys. Yog li ntawd, sim txhim kho qhov kub thiab txias ntawm cov tshuaj tiv thaiv cheeb tsam nyob rau hauv lub cub tawg, yog qhov chaw ntawm smelting ntawm calcium silicon alloy. Txhua zaus tawm ntawm lub hwj chim, thawj zaug ntxiv me me ntawm silica thiab carbonaceous reductant sib tov nyob rau hauv lub cub tawg kom rhuav tshem cov residual carbide nyob rau hauv qab ntawm lub cub tawg kom inhibit qhov hauv qab ntawm lub cub tawg. Txoj kev no yooj yim rau kev khiav lag luam, tab sis tus nqi ntawm slag yog loj thiab cov nyiaj rov qab ntawm calcium thiab silicon yog tsawg. Kev sib xyaw ntawm kev ua silicon calcium alloy slag muaj pes tsawg leeg yog roughly: SiC 22% ~ 28%, CaC210% ~ 20%, SiO212% ~ 20%, CaO30% ~ 45%, Al2O32% ~ 3%, FeO txog 0.5%, MgO txog 0.3%. Txhua tons ntawm calcium -silicon alloy slag ntau lawm 1.0 ~ 1.5 t. Calcium-silicon alloy muaj Ca Ntau dua lossis sib npaug li 24% ~ 28%, Si txog 60%. Kev tsim tawm ntawm 1t ntawm calcium -silicon alloy (24% Ca raws li lub hauv paus) siv li ntawm 2300kg ntawm silica, txog 1200kg ntawm txiv qaub, txog 1100kg ntawm coke, txog 180kg ntawm charcoal, txog 500kg ntawm bituminous thee, txog li ntawm 7020kg ntawm hluav taws xob, hluav taws xob thiab hluav taws xob hluav taws xob. 14,500 kWh. Calcium rov qab tus nqi yog 35% mus rau 43%, thiab silicon rov qab tus nqi yog 59% mus rau 62%.
Txheej txheej txheem them
Nws yog ib qho tseem ceeb ntawm kauj ruam - los ntawm - kauj ruam smelting txoj kev. Kauj Ruam 1 yog theem ntawm qhov kub thiab txias. Tom qab lub tshuab hluav taws xob sab saud raug tso tawm, cov electrode yog tawm. Tom qab energizing thiab pounding lub cub tawg, tshem tawm cov tawv lumps, npaj cov khoom nto, thiab khi ob lub qhov muag rau qhov cua. Lub cub tawg yog khiav ntawm qhov muaj peev xwm. Lub arc yog siv los ncaj qha tshav kub rau hauv qab ntawm lub cub tawg, rhuav tshem lub siab melting point carbides, nyob rau hauv thiaj li yuav tswj tus nqi ntawm nce nyob rau hauv qab ntawm lub cub tawg thiab prolong lub smelting voj voog ntawm lub cub tawg. Kauj Ruam 2 yog smelting ntawm calcium carbide theem. Thaum lub cub tawg kub nce, cov txiv qaub thiab coke los yog anthracite xav tau rau lub cub tawg no sib tov zoo thiab tag nrho ntxiv nyob ib ncig ntawm electrode. Cov tshuaj tiv thaiv tseem ceeb ntawm CaO thiab C ntawm qhov kub thiab txias yog
CaO+3C==CaC2+CO↑
Thaum CaC2 cov ntsiab lus nyob rau hauv slag tshaj 31%, piv txwv li cov acetylene tiam ib kilogram ntawm slag tshaj 60-70L, cov kauj ruam tom ntej smelting tuaj yeem pib. Kauj ruam 3 yog cov tshuaj tiv thaiv ntawm silica nrog CaC2 los tsim CaSi theem. Ntxiv ib qho kev sib xyaw ntawm silica, coke thiab charcoal, uas SiO2 thiab calcium carbide los tsim cov tshuaj tiv thaiv raws li hauv qab no
CaC2+SiO2==CaSi+2CO↑
Qhov kev vam meej lossis tsis ua tiav ntawm cov txheej txheem yog nyob ntawm cov tshuaj tiv thaiv hauv qhov cub
Yog tias koj txaus siab, thov hu rau peb hauv qab no.
Cim npe nrov: txheej txheem ntawm calcium{0}}silicon alloy, Tuam Tshoj cov txheej txheem ntawm calcium-silicon alloy manufacturers, lwm tus neeg, Hoobkas
