Foaming agent, tundish covering agent, and preparation method and application thereof

A foaming agent and tundish technology, applied in electric furnaces, furnaces, furnace types, etc., can solve problems such as inability to make better use of plasma heating, difficulty in adapting to the plasma heating process, and reduced plasma heating efficiency, so as to reduce dust and plasma Arc flickering, not easy to absorb water, good preservation effect

Active Publication Date: 2020-05-05
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plasma heating process uses three hollow graphite electrodes, and uses the high-temperature gas formed under the action of the arc as a heat source to heat the molten steel. However, the plasma heating method will produce a bright and large-scale arc during the arcing process of the electrode, and part of it will be lost. heat, which reduces the efficiency of plasma heating, and has a certain arc noise
Therefore, the tundish covering agent used in the previous process is difficult to adapt to the plasma heating process, and cannot better play the role of plasma heating

Method used

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  • Foaming agent, tundish covering agent, and preparation method and application thereof
  • Foaming agent, tundish covering agent, and preparation method and application thereof

Examples

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preparation example Construction

[0062] According to one aspect of the present invention, a preparation method of the above foaming agent, the preparation method comprises the following steps:

[0063] The raw materials are mixed uniformly to obtain a foaming agent.

[0064] The present invention provides the preparation method of the above foaming agent, the preparation method is to mix the raw materials uniformly to obtain the foaming agent. The above preparation method has the advantage of simple preparation process.

[0065] According to one aspect of the present invention, a tundish covering agent comprising the above blowing agent is provided.

[0066] In the tundish covering agent provided by the present invention, the tundish covering agent comprises the above foaming agent, the tundish covering agent has foaming ability, can form foamed slag during the tundish plasma heating process, and can further adapt to the tundish plasma heating process, better play the role of plasma heating.

[0067] In a ...

Embodiment 1～5

[0086] A foaming agent, in mass percent, the foaming agent comprises the following components:

[0087]

[0088]

[0089] Note: the particle size of the limestone is 200-250 mesh; the particle size of the dolomite is 150-200 mesh; the particle size of the magnesite is 180-220 mesh; the particle size of the carbonaceous material is 180-220 mesh .

[0090] The preparation method of the foaming agent comprises the following steps: mixing the raw materials uniformly to obtain the foaming agent.

Embodiment 6

[0092] A tundish covering agent, by mass percentage, the foaming agent comprises the following components: the foaming agent 5% prepared in Example 1, CaO and SiO 2 The mixture of 65%, Al 2 O 3 23%, MgO 3% and Fe 2 O 3 4%;

[0093] The above CaO and SiO 2 A mixture of CaO and SiO 2 The mass ratio of 1.8;

[0094] The preparation method of the above-mentioned tundish covering agent comprises the following steps: mixing the raw materials to obtain a tundish covering agent with a water content of 0.2%.

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Abstract

The invention provides a foaming agent, a tundish covering agent, and a preparation method and application thereof, and relates to the technical field of metal smelting. The foaming agent is mainly prepared from (a) a carbonate mineral and (b) a carbon-containing material; the tundish covering agent can have foaming capacity and can form foam slag by adding the foaming agent, so that the thermalload radiated to a tundish liner in a plasma heating process of a tundish is greatly reduced; the thermal efficiency is improved; meanwhile, the formed foam slag can wrap a plasma arc so as to reduceelectricity consumption and electrode loss, and improve the stability of the plasma stability; and a protecting effect can also be achieved on the tundish liner, so that the service life of a tundishbody is prolonged. In addition, the noise produced by the plasma arc can also be reduced by the formed foam slag; the dust and the arc light flash of a plasma arc can be reduced; the pollution to theenvironment can be reduced; and the operation environment of a worker can be improved.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a foaming agent, a tundish covering agent and a preparation method and application thereof. Background technique [0002] With the development of society, the requirements for the cleanliness of steel are getting higher and higher, and the tundish, as the last container for the molten steel before the molten steel solidifies, has a very important influence on the molten steel. In particular, the temperature change of molten steel in the tundish often affects the quality of the cast slab. During the abnormal pouring period, the temperature of molten steel fluctuates greatly, resulting in excessively high or low superheat, which often affects the equiaxed grain ratio of the steel. Distribution. [0003] In recent years, the tundish plasma heating method in which the temperature of molten steel is controlled to a stable target value by means of an external heat source has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/54C21C7/00
CPCC21C5/5205C21C5/54C21C7/00
Inventor 杨树峰赵梦静李京社程乃良王勇郭振和宋景欣陈赛王存冯捷
Owner UNIV OF SCI & TECH BEIJING
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