Ferroferro-silicon alloy, primarily composed of silicon, chromium, and iron. Also known as ferro-silicon alloy. It is mainly used as an intermediate alloy in the electrosilicon thermal process for producing medium, low, and micro-carbon iron. In steelmaking, it is used as a deoxidizer (replacing ferrosilicon) and a chromium additive. It generally contains >30% Cr and >35% Si, nrog rau qhov sib npaug yog hlau thiab me me ntawm impurities. Nws raug cais raws li cov ntsiab lus carbon, xws li Tsawg dua lossis sib npaug li 0.06%, Tsawg dua lossis sib npaug li 0.10%, Tsawg dua lossis sib npaug li 1.0%, thiab lwm yam.
Tsis tas li ntawd, ib qho alloy ntawm hlau, chromium, thiab silicon nrog cov ntsiab lus chromium tsis tsawg dua 30.0% thiab cov ntsiab lus silicon tsis tsawg dua 35.0%. Nws cov txheej txheem tsim khoom tau muab faib ua ob hom: ib qho - txheej txheem txheej txheem (feem ntau hu ua "slag txheej txheem" lossis " txheej txheem ore") thiab ob - txheej txheem (feem ntau hu ua "slag- txheej txheem dawb"). Cov khoom siv raw siv hauv ib qho - cov txheej txheem yog silica, chromium ore, thiab coke. Cov ntaub ntawv raw siv nyob rau hauv ob- cov txheej txheem yog silica, carbon ferrochrome, thiab steel seem. Ob txoj kev smelting siv coke ua tus neeg sawv cev txo qis.
Cov silicon hauv cov hlau feem ntau yog los ntawm SiO2 hauv silica, thaum chromium los ntawm chromite thiab carbon ferrochrome, feem. Ob leeg yog tsim los ntawm smelting nyob rau hauv ib tug ferroalloy submerged arc rauv. Nws yog tsuas yog siv los ua tus neeg saib xyuas kev txo qis hauv kev tsim khoom nruab nrab- thiab qis-carbon ferrochrome thiab micro-carbon ferrochrome, thiab ua tus neeg sawv cev nruab nrab alloying hauv steelmaking. Silicon-chromium alloys tuaj yeem muab faib ua ntau qib raws li lawv cov ntsiab lus Si, Cr, thiab C. Cov theem alloying yog raws li nram no: Si> 50% muaj (Fe·Cr)Si2; Si > 40% muaj (Fe·Cr)Si2 thiab (Fe·Cr)Si; Si > 30% muaj (Fe·Cr)Si thiab (Fe·Cr)Si; thiab thaum Si <19%, (Fe·Cr) 3C thiab (Fe·Cr) 23C6 yog qhov ntau tshaj.
Vim tias theem muaj pes tsawg leeg ntawm silicon-chromium alloy txiav txim siab lub cub tawg txo cov nyhuv, hauv kev tsim khoom, Si cov ntsiab lus hauv silicon-chromium alloy feem ntau tswj kom ntau dua 40%. Cov ntsiab lus ntawm cov pa roj carbon monoxide ntawm cov khoom siv tshiab silicon-chromium alloys feem ntau yog nruab nrab ntawm 0.2% thiab 0.8%, ua rau lawv nyuaj rau siv ncaj qha. Lawv yuav tsum tau txais kev kho mob sab nraud kom txo qis cov ntsiab lus carbon kom qis dua 0.02%. Cov qib sib txawv ntawm silicon{10}}chromium alloys tuaj yeem tsim tau raws li cov neeg siv khoom xav tau. Tsis tas li ntawd, silicon-chromium alloys kuj tuaj yeem tsim los ntawm kev ntxiv ferrosilicon rau cov kua siab siab -carbon ferrochrome.
