A kind of slagging agent for ladle furnace slagging refining and its preparation and use method

A slagging agent and ladle furnace technology, applied in the field of iron and steel metallurgy, can solve the problems of secondary pollution of molten steel, low efficiency, poor slag removal effect, etc., and achieve improved slag removal efficiency, shortened slag removal time, and reduced slag removal times Effect

Active Publication Date: 2017-04-05
江阴智产汇知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to invent a slagging agent used for slag removal after secondary slagging and refining of molten steel in the ladle furnace, so as to solve the slag removal caused by ladle slagging and refining without slagging agent in the prior art The problem of poor effect and low efficiency, and overcome the problem of secondary pollution of molten steel caused by the use of acid or neutral slag accumulators for slag scraping in ladles, such as phosphorus and sulfur return

Method used

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  • A kind of slagging agent for ladle furnace slagging refining and its preparation and use method
  • A kind of slagging agent for ladle furnace slagging refining and its preparation and use method
  • A kind of slagging agent for ladle furnace slagging refining and its preparation and use method

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Embodiment Construction

[0021] The average composition of boron mud that embodiment is used is as shown in table 1.

[0022] Table 1 The average composition of boron mud (mass percentage)

[0023]

[0024] The average composition of the spodumene used in the examples is shown in Table 2.

[0025] Element SiO 2

Li 2 o

Al 2 o 3

K 2 O+ Na 2 o

CaO+MnO P 2 o 5

Other impurities Boron mud 65 4 20 5 3 0.4 margin

[0026] The composition (percentage by weight) of limestone used in the embodiment requires: CaCO 3 95%, and the balance is impurity components.

[0027] The composition of the slagging agent used in Examples 1-5 and the ladle slagging conditions are shown in Table 3.

[0028] Table 3 The composition of the slag accumulator formulated in the examples

[0029]

[0030] The preparation process of the slag gathering agent of the above-mentioned embodiment is as follows: boron mud, spodumene, and limestone are dried and crushed...

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Abstract

The invention relates to the technical field of ferrous metallurgy, in particular to a slag accretion agent for ladle furnace slagging and refining, and a preparation method and an application method thereof. The slag accretion agent is used for slag accretion during slagging-off after secondary liquid steel slagging and refining in a ladle furnace and comprises, by weight, 40-50% of boron mud, 30-40% of spodumene and 15-25% of limestone. The preparation method mainly includes drying, crushing, grinding, dosing, blending and pelleting. The slag accretion agent for ladle furnace slagging and refining is added to a ladle top slag layer after slagging and refining and before slagging-off in the ladle furnace. The slag accretion agent has the main advantages that steel slags are emulsified to reduce their density, agglomeration performance of the steel slags is improved effectively, slag-metal separation is promoted, slag accretion efficiency and slagging-off efficiency are improved, slagging-off time is shortened, slagging-off iron loss is reduced, and liquid steel rephosphorization and resulfurization are reduced to guarantee refining effect and the like, so that the slag accretion agent has remarkable economic and social benefits and is worth popularization.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a slagging agent for slagging and refining in a ladle furnace and a preparation and use method thereof, which are used for slag gathering when molten steel is slag removed after secondary slagging and refining in a ladle furnace. Background technique [0002] In the field of iron and steel metallurgy, secondary refining outside the furnace is generally required after tapping out of the steelmaking furnace. Among them, slag refining in ladle furnaces is the most widely used. The main purpose of ladle refining is deoxidation and alloying, and adjusting the composition and temperature of molten steel. Therefore , the refining process needs to make reducing slag in the ladle furnace. In the later stage of ladle furnace slag refining, after the molten steel composition and temperature are accurately adjusted to pass, it is necessary to remove the ladle slag produced i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/04
Inventor 王宏明李桂荣李杨郭亚
Owner 江阴智产汇知识产权运营有限公司
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