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Ladle covering agent and preparation method

A covering agent and ladle technology, applied in the field of ironmaking, can solve problems such as crop yield reduction, impact on natural ecological balance, and surrounding animal and plant hazards, and achieve the effects of suitable melting point, good spreadability, accelerated rapid melting and heat preservation

Inactive Publication Date: 2019-02-15
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is also very harmful to the surrounding animals and plants, affects the natural ecological balance, and reduces the yield of crops, so it must be controlled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The ladle covering agent of this embodiment is made of the following raw materials in parts by mass: 20 parts of limestone, 30 parts of vermiculite, and 50 parts of spent cathode carbon blocks of aluminum electrolytic cells.

[0034] The preparation method of molten iron ladle covering agent, carries out according to the following steps:

[0035] (1) Crushing and grinding each raw material so that the particle size of each raw material reaches within 3 mm;

[0036] (2) Weigh each raw material according to the composition weight of the raw materials, then mix them for 10 to 20 minutes, stir evenly, and dry to obtain the ladle coating agent.

[0037] During use, the molten iron ladle coating agent in the present embodiment is packed with every 20kg as a bag. Depending on the size of the ladle and the amount of addition, the final thickness of the slag layer is 6-8cm, the slag spreads rapidly, the liquid surface of the ladle does not leak red, and the slag layer does not ...

Embodiment 2

[0040] The molten iron ladle coating agent given in this embodiment is made of the following raw materials in parts by mass: 60 parts of spent cathode carbon block of aluminum electrolytic cell, 10 parts of limestone, and 30 parts of vermiculite.

[0041] The preparation method and application method of the molten iron coating agent of this embodiment are the same as that of Embodiment 1.

[0042] The performance parameters of the molten iron coating agent prepared in this embodiment are shown in Table 1.

Embodiment 3

[0044] The molten iron ladle coating agent given in this embodiment is made of the following raw materials in parts by mass: 60 parts of spent cathode carbon block of aluminum electrolytic cell, 20 parts of limestone, and 20 parts of vermiculite.

[0045] The preparation method and application method of the molten iron coating agent of this embodiment are the same as that of Embodiment 1.

[0046] The performance parameters of the molten iron coating agent prepared in this embodiment are shown in Table 1.

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Abstract

The invention provides a ladle covering agent and a preparation method. The ladle covering agent is made from the following raw materials including, by mass, 50-70 parts of aluminum electrolysis cellspent cathode carbon blocks, 0-20 parts of limestone and 10-30 parts of vermiculite. According to the ladle covering agent provided by the invention, the adopted raw materials are low in cost, low insulphur content and small in secondary pollution; the ladle covering agent is appropriate in melting point, short in melting time and good in spreadability; and since the aluminum electrolysis cell spent cathode carbon blocks contain the carbon element and the fluorine element, the heat retaining property and fluidity of a ladle can be improved easily, and therefore, the purpose that secondary oxidation and an excessively large temperature drop of molten iron can be prevented is achieved.

Description

technical field [0001] The invention belongs to the field of ironmaking, and in particular relates to a ladle covering agent for molten iron and a preparation method thereof. Background technique [0002] The molten iron smelted in the blast furnace is transported to the steelmaking plant by ladle. Due to the low temperature of the molten iron, the temperature drops during the transportation by the ladle. The spreadability is not good, and the problems of heat preservation and reduction of secondary oxidation cannot be achieved. At present, carbonized rice husks are mainly used as thermal insulation agents for ladles, but the production process of carbonized rice husks produces a large amount of smoke and pollutes the air; carbonized rice husks have a high melting point, are not easy to melt on the surface of molten iron, and cannot form a liquid slag layer; poor spreadability , the spreading surface only reaches 60% to 70%, and 30% to 40% of the molten iron surface is expo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00
CPCC21C7/00
Inventor 张朝晖冯璐任耘
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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