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Reduced iron production method using electrowinning method, and reduced iron produced thereby

A technology of electrolytic deposition and iron reduction, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problem of difficulty in obtaining pure iron, and achieve the effect of high effectiveness

Active Publication Date: 2019-03-15
SEOUL NAT UNIV R&DB FOUND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above method discloses a method of recovering valuable metals by electrolytic refining using iron ore containing iron as an iron source, but it is recovered in the form of oxides, and there is a problem in that it is difficult to obtain pure iron

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  • Reduced iron production method using electrowinning method, and reduced iron produced thereby
  • Reduced iron production method using electrowinning method, and reduced iron produced thereby
  • Reduced iron production method using electrowinning method, and reduced iron produced thereby

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Embodiment approach

[0028] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] Advantages and features of the present invention, and a method for realizing them can be clearly understood with reference to the accompanying drawings and detailed embodiments described later.

[0030] However, the present invention is not limited to the embodiments disclosed below, and can be implemented in various ways that are different from each other. This embodiment only completes the disclosure of the present invention, and is intended to be complete for those of ordinary skill in the art to which the present invention belongs. The scope of the present invention is provided for an understanding of the scope of the invention, and the present invention is only defined by the scope of the claimed scope of the invention.

[0031] In addition, in the process of describing the present invention, when it is judged that related kn...

Embodiment 1

[0071] Utilize electrolytic deposition method to prepare reduced iron

[0072] First, sodium peroxide and boron oxide, which are oxides of Group I elements, are mixed to prepare a solid electrolyte. Iron oxide was mixed with the above solid electrolyte, pulverized and stirred using a ball mill to prepare a mixture.

[0073] The eutectic point was determined from a precalculated phase diagram of the ternary system.

[0074] In this case, the mixture includes 60% by weight of boron oxide, 30% by weight of sodium peroxide and 10% by weight of iron oxide.

[0075] After the above mixture is put into the electrolytic deposition device, and heated in a crucible at a temperature of 1000 ° C to prepare the above mixture into a molten oxide, the voltage difference between the anode and the cathode of the electrolytic deposition device reaches 1.5V and 2.5V mode regulation voltage to apply for 3 hours.

[0076] Species produced at the cathode as a result of electrowinning were analy...

experiment example 1

[0077] Confirmation of Reduction Reaction

[0078] In a solid electrolyte containing sodium peroxide and boron oxide, an experiment was conducted to see whether the reduction reaction in the electrowinning process can be carried out with iron oxide, which is relatively easy to reduce.

[0079] First, use the FACTSAGE program to calculate the phase diagram of the ternary system at 1000°C and 1 atm and confirm the eutectic point.

[0080] figure 2 It is the phase diagram of the ternary system of sodium peroxide, boron oxide and iron oxide calculated by the FACTSAGE program (B 2 o 3 -Na 2 o 2 -Fe 2 o 3 ).

[0081] refer to figure 2 , set the combination in the process area marked with a red dot as B:N:F to 6:3:1, and denote it as B 6 N 3 f 1 , set the combination of process areas marked with black dots as B:N:F to 5:3:2, and denote it as B 6 N 3 f 2 .

[0082] When the above two combinations were heated at 1000° C. for 1 hour to confirm the eutectic point, it wa...

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Abstract

The present invention relates to a reduced iron production method using an electrowinning method, and reduced iron produced thereby, the reduced iron production method comprising the steps of: producing a mixture by mixing iron oxide (Fe2O3) with a solid electrolyte containing sodium peroxide (Na2O2) and boron oxide (B2O3); and forming iron at an insoluble cathode by injecting the mixture into anelectrowinning device having an anode and the cathode, forming molten oxide by heating same, and then applying a voltage to the anode and the cathode. Thus, reduced iron in a pure iron state may be obtained by reducing iron oxide by means of an electrowinning method. Obtaining pure iron by smelting iron ore is very difficult, but reduced iron in a pure iron state may be obtained by using an electrowinning method in which an electrolyte composition and conditions for electrolysis are controlled.

Description

technical field [0001] The present invention relates to a method of producing reduced iron by using an electrolytic deposition apparatus and reduced iron produced thereby. Background technique [0002] Iron is the most abundant substance in the earth's crust after aluminum, and iron is mainly cast into steel to be used as a material for various structures, ships, automobiles and various mechanical devices. Iron is not produced in the state of pure iron, but mainly uses iron-containing hematite, magnetite, limonite, siderite, etc. as raw materials, roasting them to prepare iron oxide, and adding limestone as a solvent, The coke used as a reducing agent is then fed into a blast furnace with hot air to burn the coke while reducing the ore to produce iron, which is melted to produce pig iron. On the other hand, in order to produce pure iron from pig iron and steel, a method is used in which these are used as electrodes and electrolytic refining is performed in an iron salt aque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36C25C7/02C25C7/06
CPCC25C3/34C25C7/005
Inventor 李京雨朴宗夏崔镐吉
Owner SEOUL NAT UNIV R&DB FOUND
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