Use of Recycled Fluxes Substituting Fluorspar for Refining Operation in a Bof Reactor

Alvarenga, Valdeci Paula; Seshadri, Varadarajan; Silva, Itavahn Alves da; Silva, Carlos Antônio da; Carvalho, Filipe Bueno; Costa, Sergio Luiz

doi:10.1002/9781119093381.ch58

Cited by 1 publication

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“…In Zhou's [2] research, by changing the molten iron temperature, both Si content and final slag alkalinity, FeO and MnO, the phosphorus content of the end steel solution can be smoothly achieved below 0.015%. Alvarenga et al [3] reduced the average phosphorus content to 0.010% by partially replacing fluorite with BOF slag briquettes. Wan [4] found that by taking rephosphoration control measures such as tapping with stopping slag, adopting low phosphorus alloy and modifying the top slag in ladle etc., the average phosphorus mass fraction could reach 7.5 × 10 −5 at tapping in combined converter with single slag.…”

Section: Introductionmentioning

confidence: 99%

Dephosphorization in the early stage of converter steelmaking

Wang

Yang

2019

Ironmaking & Steelmaking

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This study focuses on understanding the dephosphorization behaviors in converter steelmaking process under different situations. When controlling the basicity of slag, Fe t O content and bath temperature by single slag and double slag-slag remaining operation to blow ordinary P-containing hot metal, the equilibrium value of phosphorus ([P] e ) between hot metal and slag in the early stage of steelmaking is lower than 0.0068%, and the ratio of actual phosphorus content ([P] r ) to equilibrium value ([P]e) is less than 4.6. By using top-blown lime powde, dephosphorization efficiency of high phosphorus hot metal at the early stage was up to 93.8%, and [P] r /[P] e lowered to be 2.24. When lime slagging instead of the top-blown lime powder method was used, the dephosphorization effect is bad in the early stage of blowing the medium phosphorus hot metal by double slag process, and it leads to high material consumption and low productivity.

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Section: Introductionmentioning

confidence: 99%