Ferrosilicon siv thiab cov txheej txheem ntau lawm

Cov tshuaj affinity ntawm silicon thiab oxygen yog siab heev, yog li ferrosilicon yog siv los ua deoxidizer ( nag lossis daus deoxidation thiab diffusion deoxidation ) hauv kev lag luam steelmaking. Tsuas yog cov hlau boiled thiab semi-tua steel, cov ntsiab lus silicon hauv steel yuav tsum tsis pub tsawg tshaj 0.10%. Silicon tsis tsim cov carbide hauv cov hlau, tab sis muaj nyob rau hauv cov tshuaj tov hauv ferrite thiab austenite. Silicon muaj qhov cuam tshuam zoo rau kev txhim kho lub zog ntawm cov khoom siv hauv cov hlau thiab kev ua haujlwm txias deformation hardening tus nqi, tab sis txo cov toughness thiab plasticity ntawm cov hlau; Nws muaj cov nyhuv nruab nrab ntawm cov hlau hardenability, tab sis nws tuaj yeem txhim kho tempering stability thiab oxidation tsis kam ntawm cov hlau, yog li silicon Hlau yog siv los ua tus neeg sawv cev alloying hauv kev lag luam steelmaking. Silicon kuj muaj cov yam ntxwv ntawm kev ua haujlwm loj, tsis zoo thermal conductivity thiab muaj zog sib nqus conductivity. Cov hlau muaj qee qhov nyiaj ntawm silicon, uas tuaj yeem txhim kho qhov sib nqus permeability ntawm steel, txo hysteresis poob, thiab txo qhov poob tam sim no. Cov hlau hluav taws xob muaj 2% mus rau 3% Si, tab sis yuav tsum muaj cov ntsiab lus titanium thiab boron tsawg. Ntxiv silicon rau cam khwb cia hlau tuaj yeem tiv thaiv kev tsim cov carbides thiab txhawb cov nag lossis daus thiab spheroidization ntawm graphite. Silicon-magnesia hlau yog ib qho siv spheroidizing tus neeg sawv cev. Ferrosilicon muaj barium, zirconium, strontium, bismuth, manganese, tsis tshua muaj ntiaj teb, thiab lwm yam yog siv los ua inoculant hauv cam khwb cia hlau ntau lawm. High-silicon ferrosilicon yog tus neeg sawv cev txo qis siv hauv kev lag luam ferroalloy los tsim cov pa roj carbon tsawg ferroalloys. Ferrosilicon hmoov uas muaj txog 15% silicon (particle loj <0.2mm) yog siv los ua tus neeg sawv cev hnyav hauv kev ua cov khoom ntxhia hnyav.

Cov khoom siv ferrosilicon ntau lawm yog submerged arc txo hluav taws xob rauv. Cov ntsiab lus ntawm silicon ntawm ferrosilicon yog tswj los ntawm ntau npaum li cas ntawm cov khoom siv hlau. Ntxiv nrog rau kev siv cov silica ntshiab thiab txo cov neeg ua haujlwm los tsim cov purity ferrosilicon, kev ua kom zoo sab nraum lub qhov cub kuj tseem yuav tsum tau txo cov impurities xws li txhuas, calcium, thiab carbon hauv cov hlau. Cov txheej txheem ferrosilicon ntau lawm yog qhia hauv daim duab 4. Ferrosilicon muaj Si≤ 65% tuaj yeem smelted hauv qhov cub hluav taws xob kaw. Ferrosilicon nrog Si ≥ 70% yog smelted nyob rau hauv ib tug qhib hluav taws xob rauv los yog ib tug semi-kaw hluav taws xob rauv.