Method for preparing ferro-silicon and magnesium using ferro-nickel slag, preparation apparatus used therefor, and smelting reduction furnace

A preparation device and reduction furnace technology, which is applied in the field of magnesium preparation devices, can solve the problems of slag becoming industrial waste and adding, and achieve the effects of enhancing cost competitiveness, reducing energy costs, and reducing carbon monoxide emissions

Inactive Publication Date: 2014-12-24
姜远燮
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since ferronickel slag does not contain calcium oxide components, it leads to the addition of quicklime in the preparation process.
[0005] And, there is the problem that the residual slag after preparing magnesium becomes industrial waste in two kinds of methods as mentioned above

Method used

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  • Method for preparing ferro-silicon and magnesium using ferro-nickel slag, preparation apparatus used therefor, and smelting reduction furnace
  • Method for preparing ferro-silicon and magnesium using ferro-nickel slag, preparation apparatus used therefor, and smelting reduction furnace
  • Method for preparing ferro-silicon and magnesium using ferro-nickel slag, preparation apparatus used therefor, and smelting reduction furnace

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Embodiment Construction

[0043] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings to describe the present invention in detail.

[0044] The embodiments of the present invention are intended to enable those skilled in the art to which the present invention pertains to understand the present invention more completely. Therefore, in order to more clearly describe the present invention, the shapes, sizes, and the like of elements in the drawings are exaggerated.

[0045] Ferronickel slag is a by-product produced during the production of ferronickel, and contains magnesium compounds and iron components. For example, ferronickel slag after extracting ferronickel from nickel ore in New Caledonia consists of the following components (percentage by weight).

[0046] Table 1

[0047] differentiate

SiO 2

MgO

al 2 o 3

T.Fe

CaO

other

content

53.45

35.5

1.45

4.5

0.65

4.45 ...

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Abstract

Disclosed is a method for preparing magnesium and ferro-silicon using ferro-nickel slag which is a by-product of a process for manufacturing ferro-nickel. The present invention provides a method for preparing magnesium from ferro-nickel slag, comprising the steps of: mixing a first material comprising ferro-nickel slang, ferro-silicon slag, ferro-silicon and a magnesium reduction catalyst; evaporating the mixed first material in a vacuum atmosphere of a thermal reduction furnace; and recovering magnesium evaporated in the thermal reduction furnace. In addition, provided is a method for preparing ferro-silicon from magnesium slag which is a by-product of a magnesium preparation for manufacturing a magnesium reducing agent, and preparing magnesium using ferro-silicon slag which is a by-product of a ferro-silicon preparation. According to the present invention, it is possible to resolve environmental problems by reducing energy costs and decreasing carbon monoxide discharge and recycle a resource discarded as a by-product of a process for preparing magnesium and ferro-silicon.

Description

technical field [0001] The present invention relates to a magnesium preparation device, and in more detail, relates to a method for preparing magnesium by using ferro-nickel slag (Ferro-Nickel Slag), which is a by-product in the ferronickel preparation process. Background technique [0002] Conventionally, as a method for producing magnesium, a method of producing magnesium by calcining dolomite using ferrosilicon as a reducing agent and fluorite as a catalyst has been used. [0003] Dolomite as MgCa(CO 3 ) 2 The minerals shown are composed of calcium carbonate and magnesium carbonate. In order to recover magnesium, it is necessary to undergo decarboxylation. As such, calcined dolomite is used as a raw material for the production of magnesium. Therefore, the cost of calcination for producing calcined dolomite can be incurred, and excessive carbon dioxide is generated, thereby causing environmental problems. [0004] On the other hand, recently, a method of producing magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/22
CPCC22B7/04C22B26/22C22C1/02C22C38/02Y02P10/20C22B7/00
Inventor 姜远燮
Owner 姜远燮
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