Submerged arc refining slag for billet lf refining and its production process and equipment

A technology for production equipment and refining slag, which is applied in the field of metallurgy, can solve the problems of noise pollution, long refining time, high power consumption, etc., and achieve the effect of improving the ball pressing efficiency and speeding up the screening rate

Active Publication Date: 2022-02-11
江苏润美新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the sharp increase in the recycling of scrap iron and steel materials, especially rebar used in construction, it is the future development trend to recycle waste rebar to smelt silicon-manganese steel; and in order to reduce production costs, some steel companies have adopted the addition of scrap steel during the billet LF refining process. Post-refining process, although this process can reduce the cost per ton of steel, it will lead to increased graphite electrode fractures and unstable current transmission during the LF refining process, resulting in high power consumption and long refining time. The electric arc generated between the steel scraps causes the service life of the ladle to drop sharply, and the noise pollution in the production process is serious;
[0003] In the LF refining process of billet, some experts and scholars have done a lot of research and application on refining submerged arc foaming, but they are only implemented for the ordinary refining process without adding scrap steel, while in the billet LF refining process For the time being, there is no relevant report on the submerged arc adding scrap steel

Method used

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  • Submerged arc refining slag for billet lf refining and its production process and equipment
  • Submerged arc refining slag for billet lf refining and its production process and equipment
  • Submerged arc refining slag for billet lf refining and its production process and equipment

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Experimental program
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Effect test

Embodiment 1

[0045] Refer figure 1 , A billet LF refinery refined refinery, the weight percentage group of raw materials is: Caco 3 50%, MgO is 20%, SIO 2 5%, Baco 3 10%, NA 2 CO 3 5%, SiC is 5%, CAF 2 5%;

[0046] Caco 3 Can be synthetic or natural limestone; Baco 3 It can be a commercially available waste; NA 2 CO 3 For industrial pure base; MGO can be any of magnesium oxide, lightly magnesium, magnesium dolomite or diamond mite; SiC can be any of industrial smelted silicon carbide or carbide waste; SiO2 can be silica Any one of quartz sand or bentonite.

[0047] The present invention is mainly used for buried arcs in the LF refining process, using carbonates (Caco 3 , Baco 3 NA 2 CO 3 , MGCO 3 ), Etc. 2 Bubble, simultaneous SiC, C, CAC 2 Waiting and Co 2 The reaction generates CO, thereby obtaining a large amount of bubbles to achieve a buried arc;

[0048] The present invention also provides a production process of refined slag for a billet LF refining, including the following steps;

[00...

Embodiment 2

[0054] Refer figure 1 As another preferred embodiment of the present invention, the difference from Embodiment 1 is that the weight percentage of the raw material is: Caco 3 65%, MgO is 10%, SIO 2 5%, Baco 3 10%, NA 2 CO 3 3%, SiC is 3%, CAF 2 4%;

[0055] Caco 3 Can be synthetic or natural limestone; Baco 3 It can be a commercially available waste; NA 2 CO 3 For industrial pure base; MGO can be any of magnesium oxide, lightly magnesium, magnesium dolomite or diamond mite; SiC can be any of industrial smelted silicon carbide or carbide waste; SiO2 can be silica Any one of quartz sand or bentonite.

[0056] The present invention is mainly used for buried arcs in the LF refining process, using carbonates (Caco 3 , Baco 3 NA 2 CO 3 , MGCO 3 ), Etc. 2 Bubble, simultaneous SiC, C, CAC 2 Waiting and Co 2 The reaction generates CO to obtain a large amount of bubbles to achieve the purpose of buried arc.

[0057] The present invention also provides a production process of refined slag for...

Embodiment 3

[0063] During the preparation of synthetic slag, it is necessary to mix the material, and the prior art mixer is mixed and stirred, and the material is uniformly mixed, and the material is uniform, the agitation effect is not ideal; in addition, the material is rolled into the material through the opposite When the slag is generally squeezed with two pressure rolls, the material is not limited to the contact range of the material and the pressure roller, and the material cannot be pressed to the material.

[0064] Refer Figure 2-11 A production apparatus for refining of a billet LF refining, including mounting frame 1, mixing mechanism 2, pressure ball mechanism 3, and drive mechanism 4, mixing mechanism 2 mounted at the top end of the mounting frame 1, a pressure ball mechanism 3 The outlet end of the mixing mechanism 2 is mounted, the drive mechanism 4 is mounted on the outside of the pressurized mechanism 3;

[0065] The mixing mechanism 2 includes a mixing tank 21, the feed ti...

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Abstract

The invention relates to the field of metallurgy technology, in particular to a submerged arc refining slag for billet LF refining, the raw material weight percent composition is: CaCO 3 40‑65% parts, MgO 0‑20% parts, SiO 2 For 5‑10% parts, BaCO 3 0‑20%, Na 2 CO 3 0‑10% parts, SiC 0‑15% parts, CaF 2 for 0‑15% parts. The present invention is mainly used for the submerged arc of the billet in the LF refining process, using carbonate (CaCO 3 、BaCO 3 、Na 2 CO 3 , MgCO 3 ) etc. as the main raw materials, carbonates decompose due to high temperature after entering the molten steel, producing a large amount of CO 2 Bubbles, SiC, C, CaC brought in at the same time 2 etc. and CO 2 The reaction generates CO, so as to obtain a large number of bubbles and realize the purpose of submerged arc.

Description

Technical field [0001] The present invention relates to the field of metallurgy, and more particularly to refinement and production processes and equipment for billet LF refining. Background technique [0002] As the number of waste steel materials, especially the reincarnation of the construction of the construction, the recycled screwed steel smelting silicone steel is the future development trend; in order to reduce production costs, some steel enterprises use the square blank LF refining process to add scrap steel After refining process, although it can reduce ton steel costs, the increase in graphite electrode fracture is increased, and the current delivery is unstable, resulting in high electricity consumption and long refining time, and due to electrodes The arc generated between scrap steel has caused sharp decline in the life of the steel bag. The noise pollution during the production process is serious; [0003] In the LF refining process of the billet, some experts hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/076B07B1/28B07B1/42B01J2/22
CPCC21C7/076B07B1/28B07B1/42B01J2/22Y02P10/20
Inventor 邓勇跃江尧华朱建强陈卫忠
Owner 江苏润美新材料有限公司
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