Tundish covering agent prepared by using blast furnace slag

A blast furnace slag and tundish technology, applied in the metallurgical field, can solve the problems of serious dust pollution, poor thermal insulation performance, poor spreadability, etc., and achieve the effects of low cost, improved internal quality, and short melting time

A blast furnace slag and tundish technology, applied in the metallurgical field, can solve the problems of serious dust pollution, poor thermal insulation performance, poor spreadability, etc., and achieve the effects of low cost, improved internal quality, and short melting time

CN103170592BActive Publication Date: 2015-02-18XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The tundish covering agent given in this example consists of 100 parts by weight of the following raw materials: 30 parts of blast furnace slag, 40 parts of limestone, 10 parts of vermiculite, and 20 parts of fluorite.

[0023] The preparation method of the above-mentioned tundish covering agent is carried out according to the following steps:

[0024] (1) Crushing and grinding each raw material to make the particle size within 3mm.

[0025] (2) Weigh each raw material according to the composition weight of the raw materials, then mix them for 10-20 minutes, stir evenly, and dry them.

[0026] During use, the tundish covering agent in the present embodiment is carefully packaged as one bag per 20kg. According to the size of the tundish, the amount of the tundish covering agent added is different. After the tundish covering agent is added, a slag layer is formed, and finally the thickness of the slag layer is 5-7cm. The slag material in the slag layer spreads rapidly, a...

Embodiment 2

[0029] The tundish covering agent given in this embodiment is composed of the following raw materials based on 100 parts by weight: 36 parts of blast furnace slag, 36 parts of limestone, 16 parts of vermiculite and 12 parts of fluorite.

[0030] The preparation method and application method of the tundish covering agent in this embodiment are the same as those in Embodiment 1.

[0031] The performance parameters of the tundish covering agent prepared in this example are shown in Table 1.

Embodiment 3

[0033] The tundish covering agent given in this embodiment is composed of the following raw materials based on 100 parts by weight: 45 parts of blast furnace slag, 25 parts of limestone, 20 parts of vermiculite, and 10 parts of fluorite.

[0034] The preparation method and application method of the tundish covering agent in this embodiment are the same as those in Embodiment 1.

[0035] The performance parameters of the tundish covering agent prepared in this example are shown in Table 1.

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Abstract

The invention provides a tundish covering agent prepared by using blast furnace slag. The tundish covering agent prepared by using the blast furnace slag comprises the following raw materials, by 100 parts of weight, 30-45 parts of the blast furnace slag, 24.7-40 parts of limestone, 10-20 parts of vermiculite and 10 -20 parts of fluorite. Primary raw materials adopted by the tundish covering agent prepared by using the blast furnace slag are low in cost, appropriate in melting points, short in melting time, and excellent in spreadability and heat retaining property. The tundish covering agent prepared by using the blast furnace slag can prevent molten steel from being secondarily oxidized and temperature drop from being too much, meanwhile, the tundish covering agent prepared by using the blast furnace slag has certain absorption mixing performance, can purify the molten steel, and improves inner quality of casting blank; no carbon exists in the tundish covering agent prepared by using the blast furnace slag, alkalinity is appropriate, recarburization is not generated to the molten steel, alkalinity-resisting materials of a tundish is not corroded, and service life of the tundish is prolonged.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a tundish covering agent, in particular to a tundish covering agent prepared from blast furnace slag. Background technique [0002] The tundish is between the ladle and the crystallizer. It receives the molten steel from the ladle and diverts it to the mold. It is the main equipment in the continuous casting process. The tundish has stable steel flow, uniform molten steel temperature, and promotes the floating of non-metallic inclusions Elimination, the multi-strand continuous casting machine divides the molten steel from the tundish, and plays the role of buffering and cohesion when multiple furnaces are continuously casting and changing ladles. This requires the tundish covering agent to have functions such as heat preservation, reduction of secondary oxidation, and adsorption of non-metallic inclusions. [0003] The tundish covering agent for pure steel disclosed in Chinese patent ZL02...

Claims

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Application Information

Patent Timeline
18 Feb 2015
Publication
CN103170592B
IPC
B22D11/111; C21B3/04
CPC
Y02W30/50
Inventors
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