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Fluoride-free slag-making fluxing agent for converter steel making

A technology of converter steelmaking and flux, which is applied in the field of iron and steel metallurgy, can solve the problems of low slagging efficiency, fluorine pollution, unfavorable early rapid slagging and dephosphorization, etc., to improve dephosphorization and desulfurization capabilities, improve alkalinity and oxidation performance and achieve the effect of waste slag reuse

Inactive Publication Date: 2015-06-10
JIANGSU UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a fluorine-free slagging flux for converter steelmaking, which overcomes the fluorine pollution, low slagging efficiency, and no It is beneficial to the key issues such as early rapid slagging and dephosphorization, and at the same time realizes the full utilization of low-grade spodumene resources

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  • Fluoride-free slag-making fluxing agent for converter steel making

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Embodiment

[0022] The present invention will be further elaborated below in conjunction with embodiment; Embodiment is only used to illustrate the present invention, is not to limit the present invention in any way

[0023] (1) Raw materials

[0024] The raw materials that embodiment adopts are as follows, and when referring to percentage below, all are percentage by weight:

[0025] The chemical composition of spodumene is: Li 2 O 5.0%, Al 2 o 3 19.56%, SiO 2 73.25%, Na 2 O 0.28%, K 2 O 0.22%, MnO 0.04%, TiO 2 0.03%, P 2 o 5 0.11%, CaO 0.06%, and the balance is trace impurities;

[0026] The chemical composition of active lime is: 100%>CaO≥90.0%, 5%≥MgO>0, 2.5%≥SiO 2 >0, the rest include Al 2 o 3 trace impurities;

[0027] Iron oxide is a mixture of rolled steel sheet and sintered ore powder, of which Fe 2 o 3 The quality score is 86%;

[0028] Take the above-mentioned raw materials and weigh them after baking at 100-150°C, and mix according to the three batching m...

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Abstract

The invention belongs to the technical field of steel and iron metallurgy and particularly relates to a fluoride-free slag-making fluxing agent for converter steel making. The invention aims at providing the fluoride-free slag-making fluxing agent for the converter steel making, and the fluoride-free slag-making fluxing agent solves key problems that at present, fluorite, laterite, ferric oxide and the like are adopted as fluxing agents for steel making and slag mixing, the fluoride pollution is caused, the slagging efficiency is low, the early-stage fast slag making dephosphorization cannot be favorably realized, and the like. Meanwhile, the sufficient utilization of low-grade spodumene resources is realized. The fluoride-free slag-making fluxing agent is characterized by consisting of the following ingredients (in percentage by mass): 41 to 50 percent of triphane, 31 to 40 percent of active lime and 11 to 20 percen tof ferric oxide.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular to a fluorine-free slagging flux for converter steelmaking. Background technique [0002] Oxygen converter steelmaking currently uses fluorspar, bauxite, iron oxide, etc. as fluxes. These three types of fluxes currently have their own advantages and disadvantages: for fluorspar, with the shortage of fluorspar resources, the price rises, and a large number of The use of fluorite will cause fluorine pollution, so the use of fluorite is strictly limited; for bauxite, its advantages are low price and wide resources, but the disadvantages are low slag removal efficiency and insufficient metallurgical function of bauxite, which is not suitable for rapid The effects of slagging and early dephosphorization are not obvious; for iron oxide, when it is used alone, it will severely corrode the furnace lining, and cannot achieve dephosphorization and desulfurization. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36C21C7/076
CPCY02P10/20
Inventor 王宏明李桂荣赵玉涛杨丽莉赵钊
Owner JIANGSU UNIV
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