Ladle covering agent prepared through utilizing blast furnace slag

A technology of ladle covering agent and blast furnace slag, applied in the metallurgical field, can solve the problems of high overall cost and inability to utilize blast furnace slag in steel plants, etc., and achieve the effects of improving internal quality, good spreading performance, good spreading and heat preservation properties

Active Publication Date: 2013-06-26
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ladle covering agent given by the above technical scheme, although its components are different, can achieve certain heat preservation performance and prevent secondary oxidation of molten steel, but the overall cost is relatively high, and it cannot fully protect blast furnace slag from steel mills. use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The ladle covering agent given in this embodiment consists of the following raw materials based on 100 parts by weight: 40 parts of blast furnace slag, 37.5 parts of limestone, 17.5 parts of vermiculite, and 5 parts of fluorite.

[0024] Prepare the preparation method of ladle covering agent, carry out according to the following steps:

[0025] (1) Crushing and grinding each raw material to make the particle size within 3mm.

[0026] (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.

[0027] During use, the ladle covering agent among the present embodiment is carefully packaged with every 20kg as a bag. According to the size of the ladle, the amount of ladle covering agent added is different. After the ladle covering agent is added, a slag layer is formed, and finally the thickness of the slag layer is 6-8cm. The slag material in the slag layer spreads rapidly, and the liqui...

Embodiment 2

[0030] The ladle covering agent given in this embodiment is composed of the following raw materials based on 100 parts by weight: 37 parts of blast furnace slag, 38 parts of limestone, 17 parts of vermiculite and 8 parts of fluorite.

[0031] The preparation method and application method of the ladle covering agent of this embodiment are the same as that of Embodiment 1.

[0032] The performance parameters of the ladle covering agent prepared in this embodiment are shown in Table 1.

Embodiment 3

[0034] The ladle covering agent given in this embodiment is composed of the following raw materials based on 100 parts by weight: 30 parts of blast furnace slag, 40 parts of limestone, 15 parts of vermiculite, and 15 parts of fluorite.

[0035] The preparation method and application method of the ladle covering agent of this embodiment are the same as that of Embodiment 1.

[0036] The performance parameters of the ladle covering agent prepared in this embodiment are shown in Table 1.

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Abstract

The invention provides a ladle covering agent prepared through utilizing blast furnace slag. The ladle covering agent is composed of 30-40 parts by weight of blast furnace slag, 26.7-40 parts by weight of limestone, 15-20 parts by weight of vermiculite and 5-15 parts by weight of fluorite, wherein the total weight part of the above raw materials is 100. The main raw materials of the ladle covering agent have the advantages of low cost, suitable melting point, short fusing time and good spreadability; and limestone decomposes at 800-1200DEG C, foams and expands, vermiculite expands at a high temperature, and the friction force among solid particles is lower than the inner friction force among powders, so the spreadability and the heat insulating property are good. The ladle covering agent can prevent the secondary oxidation and too large temperature decrease of molten steel, and has a certain impurity adsorption and inclusion capability to purify the molten steel because of the appropriate alkalinity. The ladle covering agent has no carbon, does not carburize the molten steel, and is in favor of the component control of the production process.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a ladle covering agent, in particular to a ladle covering agent prepared from blast furnace slag. Background technique [0002] Steel ladles are mainly used to store and transport molten steel and maintain the temperature of molten steel. Due to the development of continuous casting technology, the residence time of molten steel in the ladle will be extended. In order to meet the technological requirements of subsequent processes, how to maintain the temperature of molten steel in the ladle and increase The quality of molten steel has become a major issue. Therefore, in order to prevent the secondary oxidation of molten steel in the ladle, reduce the temperature drop of molten steel, provide molten steel with a suitable temperature for continuous casting, and ensure its smooth pouring, the role of thermal insulation covering agent is very important. [0003] The ladle covering agent is ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 赵福才巨建涛折媛张朝晖
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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