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Method for manganese alloying by using manganese ore and device for manganese alloying by using manganese ore

A technology of manganese alloying and application of manganese ore, which is applied in the field of iron and steel smelting, can solve the problems of low efficiency, large amount of final slag, and processing difficulties, and achieve the effects of convenient operation, zero CO2 emission, and simple composition

Inactive Publication Date: 2018-08-17
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is a typical conventional method of using manganese ore for manganese alloying, but the process also needs to add a large amount of reducing agent. Although the purpose of manganese alloying can be achieved, it requires additional reducing agent, and the use efficiency is low. The amount of slag is large, which brings difficulties to the post-processing

Method used

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  • Method for manganese alloying by using manganese ore and device for manganese alloying by using manganese ore

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Embodiment 1

[0054] Such as figure 1 As shown, an anode lifting device 1 is arranged on the upper left side of the ladle 5; the anode lifting device 1 is equipped with a high temperature resistant metal molybdenum ceramic anode 2, the number is 4, and the anode 2 is inserted in the slag 3; the anode lifting device 1 The depth at which the anode 2 is inserted into the slag 3 can be adjusted to ensure that the anode 2 is in contact with the slag 3 and not with the molten steel 4; the other side above the ladle 5 is provided with a cathode lifting device 6, and the cathode lifting device 6 is installed with a Cathode 7, the cathode 7 is a round rod with a composite structure of two layers inside and outside, the outer layer is wrapped with high temperature resistant cement, and the inside is a graphite rod; the cathode 7 is inserted into the molten steel 4; the cathode lifting device 6 can adjust the lifting stroke of the cathode 7 , ensure that the cathode 7 passes through the slag 3 and con...

Embodiment 2

[0069] The electrolytic reaction control device in this embodiment is the same as in Embodiment 1; the composition of manganese ore is shown in Table 1, and the particle size is 5-50mm; the composition of white ash is shown in Table 3; the oxygen control agent is ferrosilicon, and the composition is shown in Table 2.

[0070] Apply this special electrolytic reaction control device on the 100t ladle to carry out manganese alloying with manganese ore metal. The overall control process is as follows: the weight of molten steel in the converter is 105 tons, the C content at the end of smelting is 0.073% (percentage by weight), the temperature of molten steel at the end of smelting is 1705°C; lime and manganese ore. The amount of white ash added is 8Kg / ton of steel; the oxygen content at the end point of molten steel is 0.038%, and the oxygen content is dropped into the oxygen control agent ferrosilicon according to this, and the added amount is 70kg; the added amount of manganese ...

Embodiment 3

[0073] The electrolytic reaction control device in this embodiment is the same as in Embodiment 1; the composition of manganese ore is shown in Table 1, and the particle size is 5-50mm; the composition of white ash is shown in Table 3; the oxygen control agent is ferrosilicon, and the composition is shown in Table 2.

[0074] Apply this special electrolytic reaction control device on the 100t ladle to carry out manganese alloying with manganese ore metal. The overall control process is as follows: the weight of molten steel in the converter is 101 tons, the C content at the end point of smelting is 0.066% (percentage by weight), the temperature of molten steel at the end point of smelting is 1710°C; lime and manganese ore. The amount of white ash added is 6Kg / ton of steel; the oxygen content at the end point of molten steel is 0.045%, and the oxygen content is dropped into the oxygen control agent ferrosilicon according to this, the added amount is 80kg; the added amount of ma...

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Abstract

The invention provides a method for manganese alloying by using manganese ore and a device for manganese alloying by using the manganese ore. According to the method, the manganese ore is molten, electrolyzed and reduced to finish manganese alloying; the objective of alloying is finished by applying a direct-current electric field between an inert anode placed in slag and a cathode placed in molten steel for an electrochemical reaction and then reducing manganese in manganese oxide to enter the molten steel and exhausting oxide in the manganese oxide into atmosphere in the form of oxygen by the anode reaction with the inert anode. By means of the technology, 3-10 kg per ton of steel of the manganese ore is added into the slag and the manganese content of the molten steel can be increased by 0.1%-0.2% (weight percentage). Compared with the other manganese alloying technology and equipment, the device is simple in structure, convenient to operate and capable of achieving the objective ofmanganese alloying which is low in cost and high in efficiency; the method is a bran-new low-cost green manganese alloying technology which is capable of realizing zero-emission of CO2 and achievingthe objective of low carbon environmental protection and is huge in social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a method and device for manganese alloying using manganese ore. Background technique [0002] The rapid development of modern industry and science and technology has put forward higher and higher requirements for the performance and economy of metal materials. Various and high-performance industrial steels have become the material basis of modern civilization. In order to further improve the performance of steel, some special elements are purposely added to carbon steel during smelting to make it an alloy steel with various special properties. At present, alloy steel has been widely used in my country's national defense and modernization construction, and is an important material cornerstone. [0003] Alloy steel can be divided into alloy structural steel, alloy tool steel, special performance steel, alloy special steel and so on according to the application. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C5/28C25C3/30C25C7/02
CPCC21C5/28C21C7/0006C25C3/30C25C7/025Y02P10/134
Inventor 贾吉祥郭庆涛彭春霖李晓伟刘祥黄玉平廖相巍
Owner ANGANG STEEL CO LTD
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