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Premelted conductive slag for electrochemical deoxidation and preparation method thereof

A conductive slag and electrochemical technology, applied in the field of smelting and deoxidizing materials, can solve the problems of extremely high material requirements, dust pollution, non-compliance with energy saving and emission reduction, and achieve aerobic ion conductivity, easy storage and transportation, high efficiency and no emission. The effect of pollution deoxidation

Active Publication Date: 2015-10-07
ANGANG STEEL CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although the slag introduced in its invention has the characteristics of low melting point, fast melting speed, good fluidity, and high oxygen ion conductivity, its slag has strict requirements on the manufacturing process, and the material requirements for preparing slag are extremely high, and the production cost is very high. High, and does not meet the national requirements for energy saving, emission reduction, low-carbon environmental protection
At the same time, the synthetic slag is in the form of powder, which is seriously lost during the smelting process and will cause dust pollution
In addition, the surface tension of this synthetic slag powder is high, and it takes a long time to melt when in contact with molten steel, and the utilization rate is low, so it is not easy to popularize and apply

Method used

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  • Premelted conductive slag for electrochemical deoxidation and preparation method thereof
  • Premelted conductive slag for electrochemical deoxidation and preparation method thereof
  • Premelted conductive slag for electrochemical deoxidation and preparation method thereof

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Embodiment Construction

[0028] The main component of the used calcium oxide material that is rich in embodiment is shown in Table 1:

[0029] Table 1 is rich in calcium oxide material and main component list

[0030]

[0031] The main components of the alumina-rich material used in the embodiment are shown in Table 2:

[0032] Table 2 Alumina-rich materials and their main components

[0033]

[0034] Embodiment 1,2,3 raw material proportioning are shown in Table 3:

[0035] Table 3 Raw material ratio of electrochemical deoxidation pre-melted slag

[0036]

[0037] The materials listed in Table 3 were respectively made into raw material powders below 100 mesh. The raw material powder is uniformly mixed according to the ratio of 40% to 60% of the material rich in alumina and 40% to 60% of the material rich in calcium oxide. Then put the mixed powder into a high-temperature kiln for melting at a temperature of 1400-1550°C, and cool and crystallize after melting out of the furnace. Finally,...

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Abstract

The invention provides pre-melting conductive slag for electrochemical deoxygenation and a preparation method thereof. Raw materials include 40-60% of material rich in aluminum oxide and 40-60% of material rich in calcium oxide, and chemical components include 40-60% of CaO, 40-60% of Al2O3, less than or equal to 5% of SiO2, less than or equal to 3% of MgO, less than or equal to 2% of F<-> and less than or equal to 1% of impurities in total. The method comprises the following steps: adding the uniformly mixed powder of the material rich in aluminum oxide and the material rich in calcium oxide into a high-temperature kiln; smelting at 1,400-1,550 DEG C; breaking the cooled and crystallized block to obtain block pre-melting conductive slag with a particle size below 50mm. The pre-melting conductive slag and the preparation method thereof provided by the invention have the characteristics that the production cost is low and the waste recycling is realized. The pre-melting conductive slag has the advantages of good oxygen ion conductivity, low melting point and high melting speed, and can be quickly infiltrated and molten by the molten steel to realize efficient pollution-free deoxygenation; the pre-melting conductive slag has the advantages of high utilization rate and yield, stable performance and low fluorine content, prevents deterioration, water absorption and chalking, is convenient to store and transport, and can reduce pollution.

Description

technical field [0001] The invention belongs to the technical field of smelting deoxidation materials, in particular to a low-cost premelted conductive slag for electrochemical deoxidation and a preparation method thereof. Background technique [0002] The cleanliness of steel seriously affects the performance and quality of steel, and there are many factors that determine the cleanliness of steel, and the deoxidation operation in the smelting process is the key link. In order to remove the oxygen in the steel, the traditional deoxidation method is mainly based on the direct deoxidation of the deoxidizer. create pollution. As people's requirements for the cleanliness of steel are getting higher and higher, the traditional deoxidation method can no longer meet people's requirements. Reducing or even avoiding the pollution of deoxidation products to molten steel is an important way to reduce the total oxygen content in steel and improve the surface and internal quality of pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
CPCY02P10/20
Inventor 贾吉祥廖相巍曹东郭庆涛朱晓雷
Owner ANGANG STEEL CO LTD
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