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WO2013162269A1 - Method for preparing ferro-silicon and magnesium using ferro-nickel slag, preparation apparatus used therefor, and smelting reduction furnace - Google Patents

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

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Publication number
WO2013162269A1
WO2013162269A1 PCT/KR2013/003484 KR2013003484W WO2013162269A1 WO 2013162269 A1 WO2013162269 A1 WO 2013162269A1 KR 2013003484 W KR2013003484 W KR 2013003484W WO 2013162269 A1 WO2013162269 A1 WO 2013162269A1
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Prior art keywords
magnesium
ferrosilicon
slag
furnace
reduction furnace
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French (fr)
Korean (ko)
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강원섭
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Priority to JP2015508861A priority Critical patent/JP2015514875A/en
Priority to KR1020137010467A priority patent/KR101325532B1/en
Priority to CN201380021124.1A priority patent/CN104245974A/en
Publication of WO2013162269A1 publication Critical patent/WO2013162269A1/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/20—Obtaining alkaline earth metals or magnesium
    • C22B26/22—Obtaining magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to an apparatus for producing magnesium, and more particularly, to a method for producing magnesium using ferro-nickel slag which is a by-product of ferronickel production.
  • Dolomite is a mineral composed of lime carbonate and magnesium carbonate represented by MgCa (CO 3 ) 2 , which has to undergo decarbonate to recover magnesium, and calcined dolomite is used as a raw material for producing magnesium. Therefore, a calcining cost for the production of calcined dolomite may occur and carbon dioxide may be generated in an excessive amount, causing environmental problems.
  • ferronickel slag does not contain a calcium oxide component, a problem arises in that quick lime is added in the manufacturing process.
  • the present invention comprises the steps of: blending a first raw material containing a ferronickel slag, ferrosilicon slag, ferrosilicon and magnesium reduction catalyst; Vaporizing the blended first raw material in a vacuum atmosphere of a heat reduction furnace; And it provides a method for producing magnesium from ferronickel slag comprising the step of recovering magnesium vaporized in the heat reduction furnace.
  • the ferronickel slag may be one containing a magnesium compound and an iron component.
  • ferrosilicon slag in the present invention may be one containing calcium oxide.
  • the present invention comprises the steps of blending a second raw material including magnesium slag and iron ore discharged from the heat reduction furnace; Injecting the second raw material into a molten reduction furnace to prepare ferro-silicon using silica and iron contained in the magnesium slag; And recovering ferrosilicon slag from the melt reduction reactor and circulating it to the heat reduction reactor.
  • the present invention may further comprise the step of recovering the ferrosilicon solution in the melt reduction furnace. At this time, at least a part of the recovered ferro-silicon solution may be further mixed with the first raw material to be molded.
  • the heat reduction is a magnesium from ferronickel slag
  • a magnesium production apparatus characterized in that the vaporization, the ferro-silicon slag of the melt reduction furnace is introduced as a raw material of the heat reduction furnace.
  • the ferrosilicon slag may serve as a source of calcium oxide component for the reduction of the magnesium oxide.
  • the melt reduction furnace may be a coke oven or an electric furnace.
  • the melt reduction furnace may include a melting furnace and a reduction furnace in which the melting furnace and the first turbidity are connected.
  • the reducing furnace may be provided with a pulverized coal input device.
  • the reduction furnace may be provided with at least a second and third runway of varying height for recovery of the molten ferrosilicon from the bottom.
  • the magnesium slag of the heat reduction furnace may be circulated to the melt reduction reactor.
  • the molten reduction furnace for reducing the ferrosilic acid as a raw material of magnesium slag and iron ore as a raw material
  • the molten reduction furnace includes a melting furnace and a reducing furnace, Melting furnace and reducing furnace provides a melt reduction furnace, characterized in that connected through the first run for the transfer of the ferrosilicon solution.
  • the reducing furnace may include second and third runaways which are displaced from the bottom to discharge the ferrosilicon solution.
  • ferro-silicon and magnesium using ferronickel slag it is possible to reduce the energy cost of the firing process and to reduce the carbon monoxide emissions to improve the environmental problems.
  • the present invention it is possible to manufacture the ferrosilicon using the slag generated during the production of magnesium to minimize the amount of slag generated as industrial waste, the reducing aid for producing magnesium from the slag generated in the process of producing ferrosilicon It can minimize the generation of slag which is industrial waste.
  • raw material costs, logistics costs, equipment investment costs, and waste disposal costs can be significantly reduced compared to the existing manufacturing method, thereby improving cost competitiveness.
  • FIG. 1 conceptually illustrates a manufacturing process according to a preferred embodiment of the present invention.
  • FIG. 2 is a view conceptually illustrating a manufacturing process according to another embodiment of the present invention.
  • FIG 3 is a view schematically showing a melt reduction furnace according to a preferred embodiment of the present invention.
  • Ferronickel slag is a by-product of ferronickel production and contains magnesium compounds and iron components.
  • ferronickel slag after ferronickel extraction from New Caledonia nickel ore is composed of the following components (% by weight).
  • reaction scheme for recovering magnesium from the magnesium oxide contained in the ferronickel slag is as follows.
  • magnesium slag containing compounds such as CaO and SiO 2 is discharged as a by-product.
  • ferrosilicon slag may be used as the source of the calcium oxide.
  • the ferrosilicon slag is a by-product discharged in the manufacturing process of ferrosilicon, for example, is composed of the following components.
  • the calcium oxide contained in the ferrosilicon slag may be circulated in the manufacturing process of the present invention without additional input.
  • ferrosilicon may be prepared by reducing magnesium slag which is a by-product of Chemical Formula 1, and ferrosilicon slag, which is a by-product of ferrosilicon manufacturing process, is used as a calcium oxide source of Chemical Formula 1.
  • Magnesium slag as a by-product of the magnesium manufacturing process in the present invention consists of the following components by way of example.
  • the reaction scheme for preparing ferrosilicon from magnesium slag can be expressed as follows.
  • the component such as CaO contained in the magnesium slag is included in the ferrosilicon slag as a by-product of the manufacturing process, and serves as a source of CaO of the formula (1).
  • the present invention allows the magnesium recovery process and the ferrosilicon manufacturing process to be closely related, thereby enabling the recovery of useful resources from various slag disposed of while minimizing the input of additional resources.
  • FIG. 1 conceptually illustrates a manufacturing process according to a preferred embodiment of the present invention.
  • the ferrosilicon and magnesium production apparatus of the present invention melt reduction furnace 100, shredder 120, molding machine 130, heat reduction furnace 140, condenser 150, vacuum pump 160 It may include a ferrosilicon molding machine (170).
  • the melt reduction furnace 100 produces ferrosilicon from the silica and iron oxide contained in the magnesium slag.
  • magnesium slag and iron ore may be introduced into the melt reduction reactor 100 as a raw material.
  • the melt reduction furnace 100 may be implemented as a coke oven or an electric furnace. In the coke furnace or electric furnace, magnesium slag and iron ore are heated, melted, and reduced to carbon at 1400 ° C. to 1600 ° C. to produce silica and iron ore contained in the slag as a ferrosilicon solution.
  • the coke oven or the electric furnace may be provided with an input device for supplying pulverized coal.
  • the ferrosilicon solution and the ferrosilicon slag of the melt reduction reactor 100 is discharged to the ladle 110, the discharged ferrosilicon solution is put and solidified by a molding means, such as a ferrosilicon molding machine 170 to a predetermined size Shaped ferrosilicon ingots are obtained.
  • a molding means such as a ferrosilicon molding machine 170 to a predetermined size Shaped ferrosilicon ingots are obtained.
  • ferro-silicon slag as a by-product of this process is used as a raw material of the heat reduction furnace 140 as described later.
  • the shredder 120 may be any shredding means such as a screw mill, a ball mill.
  • the powder crushed in the molding machine 130 is mixed with the ferrosilicon solution to produce a molded body in the molding machine 120.
  • the ferrosilicon solution acts as a binder of the molded body.
  • the ferrocylocone solution may be included 5 to 30% by weight of the total weight of the molded body.
  • the manufactured molded article is charged into the heat reduction furnace 140.
  • the heat reduction furnace 140 vaporizes magnesium by heating the injected molded body. To this end, the heat reduction path 140 is maintained in a vacuum state. To this end, the magnesium reduction furnace 140 may include a reaction tube 141 of heat resistant steel to maintain the inside of the reaction tube 141 in a vacuum state. The heat reduction furnace 140 is maintained at a temperature of more than the vaporization temperature of magnesium, for example, 1100 °C ⁇ 1250 °C vaporizes magnesium.
  • the vaporized gas magnesium is collected and condensed in the condenser 150 to prepare a magnesium solution.
  • Magnesium slag remaining after the reduction of magnesium may be used as a raw material for ferrosilicon production.
  • the present invention enables the production of magnesium from ferronickel slag using the by-products of the ferrosilicon production process and magnesium production process.
  • the present invention by linking the two processes, it is possible to circulate the calcium oxide contained in the slag as a calcium oxide source for the reduction of magnesium to enable efficient use of resources.
  • the high temperature magnesium slag which is a by-product of the magnesium reduction furnace 140, may be used in the coke oven / electric furnace 100, it is also efficient in terms of energy cost.
  • FIG. 2 is a view conceptually illustrating a manufacturing process according to another embodiment of the present invention.
  • the melt reduction furnace 200 may be composed of a melting furnace 210 and a reducing furnace 220.
  • the melting furnace 210 melts a raw material including magnesium slag and iron ore. At this time, a fuel containing anthracite coal and / or bituminous coal is injected into the melting furnace 210. Of course, heavy oil and oxygen may also be used as the fuel.
  • the reduction furnace 220 reduces the molten raw material to produce a ferrosilicon solution.
  • the reduction furnace 220 may be provided with an input device for the input of a reducing agent such as pulverized coal.
  • FIG 3 is a view schematically showing a melt reduction furnace 200 according to a preferred embodiment of the present invention.
  • the melting furnace 210 is to charge the magnesium slag, iron ore or coal (anthracite coal / coal briquettes) through the raw material hopper 211 in the upper portion.
  • the melting furnace 210 supplies heavy oil and oxygen through the heavy oil burner 212 and heats raw materials to 1400 to 1600 ° C. using coal, etc., to dissolve minerals.
  • the molten minerals are introduced into the reduction furnace 220 under the melting furnace through the solution bath 214 and the pulverized coal is introduced into the reduction furnace 220 through the pulverized coal hopper 221 installed at the upper portion of the reduction furnace 220. .
  • the mineral is reduced by the injected pulverized coal to produce a ferrosilicon solution.
  • the pulverized coal is controlled by the pulverized coal valve device 222 and prevents the oxidation of metal by preventing the intrusion of outside air into the reduction furnace 220.
  • the ferrosilicon solution is discharged through the solution baths 223 and 224 installed in the lower part of the reduction furnace when a predetermined amount is collected in the reduction furnace 220.
  • the reduction furnace is provided with at least two different turbidities varying in height with respect to the bottom of the reduction furnace. The reason why a plurality of runaways are provided as follows is as follows.
  • Iron in the melt made of iron and silicon in the reduction furnace has a higher specific gravity than silicon and is concentrated in the lower layer of the melt, the higher the content of silicon toward the upper layer.
  • the ferrosilicon can be prepared by discharging all the ferrosilicon melt through the bottom iron solution bath 223 when the ferrosilicon (silicon component: 75 wt%) is mixed.
  • the melt is discharged through the ferrosilicone solution type (224) by using the difference in specific gravity of iron and silicon, and the melt discharged through the iron solution type (224) is By reloading into the melting furnace 210, it is possible to produce ferrosilicon having a high silicon component specific gravity.
  • the melt is discharged through the ferrosilicone solution type (224) by using the difference in specific gravity of iron and silicon, and the melt discharged through the iron solution type (224) is By reloading into the melting furnace 210, it is possible to produce ferrosilicon having a high silicon component specific gravity.
  • ferrosilicon having a high iron content in the lower layer it is possible to prepare ferrosilicon having a very low silicon content.
  • the melt reduction furnace 200 of the present invention has a high ferrosilicon component as described above. Silicon can be manufactured.

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  • Materials Engineering (AREA)
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  • Metallurgy (AREA)
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Description

페로니켈슬래그를 이용한 페로실리콘과 마그네슘 제조방법 및 그에 사용되는 제조장치 및 용융환원로Ferrosilicon and magnesium manufacturing method using ferronickel slag, manufacturing apparatus and melt reduction furnace used therein

본 발명은 마그네슘 제조장치에 관한 것으로, 보다 상세하게는 페로니켈 제조 과정의 부산물인 페로니켈슬래그(Ferro-Nickel Slag)를 이용하여 마그네슘을 제조하는 방법에 관한 것이다.The present invention relates to an apparatus for producing magnesium, and more particularly, to a method for producing magnesium using ferro-nickel slag which is a by-product of ferronickel production.

마그네슘 제조방법에는 전통적으로 소성돌로마이트에 환원제인 페로실리콘과 촉매로서 형석을 이용하여 마그네슘을 제조하는 방법이 사용되어 왔다. As a method of manufacturing magnesium, a method of manufacturing magnesium using fluorite as a catalyst and ferrosilicon as a reducing agent has been used in the calcined dolomite.

돌로마이트는 MgCa(CO3)2로 표현되는 탄산석회와 탄산마그네슘으로 이루어지는 광물로서, 마그네슘의 회수를 위해서는 탈 탄산을 거쳐야 하며, 이와 같이 소성된 소성돌로마이트가 마그네슘의 제조 원료로 사용된다. 따라서, 소성돌로마이트의 제조를 위한 소성 비용이 발생하고 이산화탄소가 과량으로 발생하여 환경문제를 유발할 수 있다. Dolomite is a mineral composed of lime carbonate and magnesium carbonate represented by MgCa (CO 3 ) 2 , which has to undergo decarbonate to recover magnesium, and calcined dolomite is used as a raw material for producing magnesium. Therefore, a calcining cost for the production of calcined dolomite may occur and carbon dioxide may be generated in an excessive amount, causing environmental problems.

한편, 최근에는 페로니켈슬래그로부터 마그네슘을 제조하는 방법이 연구 개발 중에 있다. 그러나, 페로니켈슬래그는 산화칼슘 성분을 함유하고 있지 않아 제조 공정에서 생석회를 추가로 투입하여야 하는 문제점이 발생한다. Recently, a method for producing magnesium from ferronickel slag is under research and development. However, since ferronickel slag does not contain a calcium oxide component, a problem arises in that quick lime is added in the manufacturing process.

또한 전술한 두 방법들은 마그네슘을 제조하고 남은 슬래그가 산업 폐기물로 발생한다는 문제점을 갖는다. In addition, the two methods described above have a problem that the slag left after producing magnesium is generated as industrial waste.

따라서, 페로니켈슬래그로부터 마그네슘을 회수하되 제조 과정에서 비용 증가 문제를 발생시키지 않고, 제조 부산물을 발생시키지 않는 환경 친화적인 마그네슘 제조 방법에 대한 요구가 절실하다.Therefore, there is an urgent need for an environmentally friendly method for producing magnesium that recovers magnesium from ferronickel slag but does not cause cost increase in the manufacturing process and does not generate manufacturing by-products.

상기한 종래 기술의 문제점을 해결하기 위하여, 본 발명은 페로니켈슬래그를 이용하여 마그네슘과 페로실리콘을 포함하는 유용한 자원을 제조하는 신규한 방법을 제공하는 것을 목적으로 한다.In order to solve the above problems of the prior art, it is an object of the present invention to provide a novel method for producing a useful resource comprising magnesium and ferrosilicon using ferronickel slag.

또한 본 발명은 마그네슘 제조 과정의 부산물을 공정 내에서 재활용할 수 있는 신규한 마그네슘 및 페로실리콘 제조 방법을 제공하는 것을 목적으로 한다.It is also an object of the present invention to provide a novel method for producing magnesium and ferrosilicon which can recycle by-products of magnesium production process in the process.

또한 본 발명은 상기 마그네슘 제조 방법에 적용하기에 적합한 마그네슘 제조 장치를 제공하는 것을 목적으로 한다. It is also an object of the present invention to provide a magnesium production apparatus suitable for application to the magnesium production method.

또한, 본 발명은 페로실리콘의 제조에 적합한 용융환원로를 제공하는 것을 목적으로 한다.It is also an object of the present invention to provide a melt reduction furnace suitable for the production of ferrosilicon.

상기 기술적 과제를 달성하기 위하여 본 발명은, 페로니켈슬래그, 페로실리콘슬래그, 페로실리콘 및 마그네슘 환원촉매를 포함하는 제1 원료를 배합하는 단계; 상기 배합된 제1 원료를 열환원로의 진공 분위기에서 기화하는 단계; 및 상기 열환원로에서 기화된 마그네슘을 회수하는 단계를 포함하는 페로니켈슬래그로부터 마그네슘 제조 방법을 제공한다. In order to achieve the above technical problem, the present invention comprises the steps of: blending a first raw material containing a ferronickel slag, ferrosilicon slag, ferrosilicon and magnesium reduction catalyst; Vaporizing the blended first raw material in a vacuum atmosphere of a heat reduction furnace; And it provides a method for producing magnesium from ferronickel slag comprising the step of recovering magnesium vaporized in the heat reduction furnace.

본 발명에서 상기 페로니켈슬래그는 마그네슘 화합물 및 철 성분을 포함하는 것일 수 있다. In the present invention, the ferronickel slag may be one containing a magnesium compound and an iron component.

또한 본 발명에서 상기 페로실리콘슬래그는 산화칼슘을 포함하는 것일 수 있다. In addition, the ferrosilicon slag in the present invention may be one containing calcium oxide.

또한 본 발명은 상기 열환원로로부터 배출되는 마그네슘슬래그와 철광석을 포함하는 제2 원료를 배합하는 단계; 상기 제2 원료를 용융환원로에 투입하여 상기 마그네슘슬래그에 함유된 규석과 철 성분을 이용, 페로실리콘으로 제조하는 단계; 및 상기 용융환원로에서 페로실리콘슬래그를 회수하여 상기 열환원로로 순환시키는 단계를 더 포함하는 마그네슘 제조 방법을 제공한다. In another aspect, the present invention comprises the steps of blending a second raw material including magnesium slag and iron ore discharged from the heat reduction furnace; Injecting the second raw material into a molten reduction furnace to prepare ferro-silicon using silica and iron contained in the magnesium slag; And recovering ferrosilicon slag from the melt reduction reactor and circulating it to the heat reduction reactor.

또한 본 발명은 상기 용융환원로에서 페로실리콘 용액을 회수하는 단계를 더 포함할 수 있다. 이 때, 상기 회수된 페로실리콘 용액의 최소한 일부를 상기 제1 원료와 혼합하여 성형하는 단계가 더 포함될 수 있다. In another aspect, the present invention may further comprise the step of recovering the ferrosilicon solution in the melt reduction furnace. At this time, at least a part of the recovered ferro-silicon solution may be further mixed with the first raw material to be molded.

상기 다른 기술적 과제를 달성하기 위하여 본 발명은, 페로실리콘 제조를 위한 용융환원로 및 마그네슘 산화물을 환원하기 위한 열환원로를 포함하는 마그네슘 제조 장치에 있어서, 상기 열환원로는 페로니켈슬래그로부터 마그네슘을 증기화하고, 상기 용융환원로의 페로실리콘슬래그가 상기 열환원로의 원료로 투입되는 것을 특징으로 하는 마그네슘 제조 장치를 제공한다. In order to achieve the above another technical problem, the present invention, in the magnesium production apparatus comprising a molten reduction furnace for the production of ferro-silicon and a thermal reduction furnace for reducing the magnesium oxide, the heat reduction is a magnesium from ferronickel slag Provided is a magnesium production apparatus characterized in that the vaporization, the ferro-silicon slag of the melt reduction furnace is introduced as a raw material of the heat reduction furnace.

본 발명에서 상기 페로실리콘슬래그는 상기 마그네슘 산화물의 환원을 위한 산화칼슘 성분의 공급원으로 작용할 수 있다. In the present invention, the ferrosilicon slag may serve as a source of calcium oxide component for the reduction of the magnesium oxide.

본 발명에서 상기 용융환원로는 코크스로 또는 전기로일 수 있다. 이와 달리, 상기 용융환원로는 용융로 및 상기 용융로와 제1 탕도가 연결되는 환원로를 포함할 수도 있다. In the present invention, the melt reduction furnace may be a coke oven or an electric furnace. In contrast, the melt reduction furnace may include a melting furnace and a reduction furnace in which the melting furnace and the first turbidity are connected.

본 발명에서 상기 환원로는 미분탄 투입 장치를 구비할 수 있다. In the present invention, the reducing furnace may be provided with a pulverized coal input device.

또한, 본 발명에서 상기 환원로는 저면으로부터 용융된 페로실리콘의 회수를 위해 높이를 달리하는 최소한 제2 탕도 및 제3 탕도를 구비할 수 있다. In addition, in the present invention, the reduction furnace may be provided with at least a second and third runway of varying height for recovery of the molten ferrosilicon from the bottom.

또한, 본 발명에서 상기 열환원로의 마그네슘슬래그는 상기 용융환원로로 순환될 수 있다. In addition, in the present invention, the magnesium slag of the heat reduction furnace may be circulated to the melt reduction reactor.

상기 또 다른 기술적 과제를 달성하기 위하여 본 발명은, 마그네슘 제조의 부산물인 마그네슘슬래그와 철광석을 원료로 페로실리콘을 환원하는 용융환원로에 있어서, 상기 용융환원로는 용융로 및 환원로를 포함하며, 상기 용융로와 환원로는 페로실리콘 용액의 이송을 위한 제1 탕도를 통해 연결된 것을 특징으로 하는 용융환원로를 제공한다. In order to achieve the above another technical problem, the present invention, in the molten reduction furnace for reducing the ferrosilic acid as a raw material of magnesium slag and iron ore as a raw material, the molten reduction furnace includes a melting furnace and a reducing furnace, Melting furnace and reducing furnace provides a melt reduction furnace, characterized in that connected through the first run for the transfer of the ferrosilicon solution.

본 발명에서 상기 환원로는 페로실리콘 용액의 배출을 위해 저면으로부터 위치를 달리하는 제2 및 제3 탕도를 포함할 수 있다.In the present invention, the reducing furnace may include second and third runaways which are displaced from the bottom to discharge the ferrosilicon solution.

본 발명에 따르면, 페로니켈슬래그를 이용하여 페로실리콘과 마그네슘을 제조함으로써 소성 과정에 따른 에너지 비용을 줄이고 일산화탄소 배출을 감소시켜 환경문제를 개선시킬 수 있게 된다.According to the present invention, by producing ferro-silicon and magnesium using ferronickel slag it is possible to reduce the energy cost of the firing process and to reduce the carbon monoxide emissions to improve the environmental problems.

또한, 본 발명에 따르면 마그네슘의 제조시 발생하는 슬래그를 이용하여 페로실리콘을 제조할 수 있어 산업폐기물인 슬래그 발생량을 최소화할 수 있고, 페로실리콘의 제조과정에서 발생하는 슬래그를 마그네슘 제조를 위한 환원보조제로 활용함으로써 산업폐기물인 슬래그 발생량을 최소화할 수 있다. 이에 따라, 원료비용, 물류비용, 설비투자비용, 폐기물처리비용을 줄이면서 기존 제조공법에 비해 제조원가를 크게 낮추어 원가경쟁력을 향상시킬 수 있다.In addition, according to the present invention it is possible to manufacture the ferrosilicon using the slag generated during the production of magnesium to minimize the amount of slag generated as industrial waste, the reducing aid for producing magnesium from the slag generated in the process of producing ferrosilicon It can minimize the generation of slag which is industrial waste. As a result, raw material costs, logistics costs, equipment investment costs, and waste disposal costs can be significantly reduced compared to the existing manufacturing method, thereby improving cost competitiveness.

도 1은 본 발명의 바람직한 실시예에 따른 제조 공정을 개념적으로 도시한 도면이다. 1 conceptually illustrates a manufacturing process according to a preferred embodiment of the present invention.

도 2는 본 발명의 다른 실시예에 따른 제조 공정을 개념적으로 도시한 도면이다. 2 is a view conceptually illustrating a manufacturing process according to another embodiment of the present invention.

도 3은 본 발명의 바람직한 실시예에 따른 용융환원로를 모식적으로 도시한 도면이다.3 is a view schematically showing a melt reduction furnace according to a preferred embodiment of the present invention.

(부호의 설명)(Explanation of the sign)

100 용융환원로 110 래들100 Melt Reduction Furnace 110 Ladle

120 파쇄기 130 성형기120 Crusher 130 Molding Machine

140 열환원로 150 응축기140 Heat Reduction Furnace 150 Condenser

160 진공펌프 170 페로실리콘 주형기 160 Vacuum Pump 170 Ferrosilicon Molding Machine

200 용융환원로 210 용융로200 Melting Reduction Furnace 210 Melting Furnace

211 원료호퍼 212 중유버너211 Raw Material Hopper 212 Heavy Oil Burner

213 배기가스 배출구 214 용액탕도213 Exhaust gas outlet 214 Solution

220 환원로 221 미분탄 호퍼220 Reduction Furnace 221 Pulverized Coal Hopper

222 미분탄 밸브장치 223 철 용액탕도222 Pulverized coal valve device 223 Iron solution

224 페로실리콘 용액탕도224 Ferrosilicon Solution

이하 도면을 참조하여 본 발명의 바람직한 실시예를 설명함으로써, 본 발명을 상술한다. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 실시형태는 당 업계에서 평균적인 지식을 가진 자에게 본 발명을 보다 완전하게 설명하기 위해서 제공되는 것이다. 따라서, 도면에서의 요소들의 형상 및 크기 등은 보다 명확한 설명을 위해 과장될 수 있다.Embodiments of the present invention are provided to more completely describe the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity.

페로니켈슬래그는 페로니켈 제조 과정에서 발생하는 부산물로서, 마그네슘 화합물 및 철 성분을 포함하고 있다. 예컨대, 뉴칼레도니아 니켈 광석으로부터 페로니켈 추출 후의 페로니켈슬래그는 다음의 성분(중량%)으로 구성된다.Ferronickel slag is a by-product of ferronickel production and contains magnesium compounds and iron components. For example, ferronickel slag after ferronickel extraction from New Caledonia nickel ore is composed of the following components (% by weight).

표 1 구분 SiO2 MgO Al2O3 T.Fe CaO 기타 함량 53.45 35.5 1.45 4.5 0.65 4.45 Table 1 division SiO2 MgO Al2O3 T.Fe CaO Other content 53.45 35.5 1.45 4.5 0.65 4.45

본 발명에서 상기 페로니켈슬래그에 포함된 마그네슘 산화물로부터 마그네슘을 회수하기 위한 반응식은 다음과 같다. In the present invention, the reaction scheme for recovering magnesium from the magnesium oxide contained in the ferronickel slag is as follows.

(화학식 1)(Formula 1)

2MgO + 2CaO + Si = 2Mg↑ + 2CaO·SiO2 2MgO + 2CaO + Si = 2Mg ↑ + 2CaOSiO 2

즉, 위 반응식에서 알 수 있듯이, 마그네슘 산화물로부터 마그네슘을 환원하기 위해서는 산화칼슘과 규소가 공급되어야 한다. 또한, 위 반응식에 따른 마그네슘 제조 공정에서는 부산물로 CaO와 SiO2와 같은 화합물을 포함하는 마그네슘슬래그가 배출된다. That is, as can be seen in the above reaction, calcium oxide and silicon must be supplied to reduce magnesium from magnesium oxide. In addition, in the magnesium manufacturing process according to the above reaction scheme, magnesium slag containing compounds such as CaO and SiO 2 is discharged as a by-product.

한편, 본 발명에서 상기 산화칼슘의 공급원으로는 페로실리콘슬래그가 사용될 수 있다. 상기 페로실리콘슬래그는 페로실리콘의 제조과정에서 배출되는 부산물로, 예시적으로 다음과 같은 성분으로 구성된다. Meanwhile, in the present invention, ferrosilicon slag may be used as the source of the calcium oxide. The ferrosilicon slag is a by-product discharged in the manufacturing process of ferrosilicon, for example, is composed of the following components.

표 2 구분 SiO2 CaO Al2O3 T.Fe MgO 기타 함량 18.29 54.7 2.93 0.85 11.88 11.35 TABLE 2 division SiO2 CaO Al2O3 T.Fe MgO Other content 18.29 54.7 2.93 0.85 11.88 11.35

또한, 후술하는 바와 같이, 페로실리콘슬래그에 포함된 산화칼슘은 추가적 투입 없이 본 발명의 제조 공정에서 순환될 수 있다. In addition, as described below, the calcium oxide contained in the ferrosilicon slag may be circulated in the manufacturing process of the present invention without additional input.

이를 위해 본 발명에서 마그네슘 회수 공정과 페로실리콘 제조공정은 순환적으로 연관된다. 즉, 본 발명에서 페로실리콘은 상기 화학식1의 부산물인 마그네슘슬래그를 환원함으로써 제조될 수 있고, 페로실리콘 제조 공정의 부산물인 페로실리콘슬래그는 화학식 1의 산화칼슘 공급원으로 사용된다.To this end, in the present invention, the magnesium recovery process and the ferrosilicon production process are cyclically related. That is, in the present invention, ferrosilicon may be prepared by reducing magnesium slag which is a by-product of Chemical Formula 1, and ferrosilicon slag, which is a by-product of ferrosilicon manufacturing process, is used as a calcium oxide source of Chemical Formula 1.

본 발명에서 마그네슘 제조공정의 부산물로서의 마그네슘슬래그는 예시적으로 다음과 같은 성분으로 구성된다.Magnesium slag as a by-product of the magnesium manufacturing process in the present invention consists of the following components by way of example.

표 3 구분 SiO2 CaO Al2O3 T.Fe MgO 기타 함량 65.84 21.68 0.99 2.82 4.34 4.33 TABLE 3 division SiO2 CaO Al2O3 T.Fe MgO Other content 65.84 21.68 0.99 2.82 4.34 4.33

마그네슘 슬래그로부터 페로실리콘을 제조하는 반응식은 다음과 같이 표현될 수 있다. The reaction scheme for preparing ferrosilicon from magnesium slag can be expressed as follows.

(화학식 2)(Formula 2)

SiO2 + xFe + C = Fe-Si + CO2 ↑SiO 2 + xFe + C = Fe-Si + CO 2 ↑

따라서, 마그네슘슬래그에 포함된 CaO 등의 성분은 제조 공정의 부산물인 페로실리콘슬래그에 포함되며, 상기 화학식 1의 CaO의 공급원으로 작용한다.Therefore, the component such as CaO contained in the magnesium slag is included in the ferrosilicon slag as a by-product of the manufacturing process, and serves as a source of CaO of the formula (1).

이상과 같이, 본 발명은 마그네슘 회수 공정과 페로실리콘 제조 공정을 밀접하게 연관시킴으로써 추가적 자원의 투입을 최소화하면서 폐기 처리되는 각종 슬래그로부터 유용한 자원을 회수할 수 있게 된다.As described above, the present invention allows the magnesium recovery process and the ferrosilicon manufacturing process to be closely related, thereby enabling the recovery of useful resources from various slag disposed of while minimizing the input of additional resources.

도 1은 본 발명의 바람직한 실시예에 따른 제조 공정을 개념적으로 도시한 도면이다. 1 conceptually illustrates a manufacturing process according to a preferred embodiment of the present invention.

도 1를 참조하면, 본 발명의 페로실리콘 및 마그네슘 제조 장치는 용융환원로(100), 파쇄기(120), 성형기(130), 열환원로(140), 응축기(150), 진공펌프(160), 페로실리콘 주형기(170)를 포함할 수 있다.Referring to Figure 1, the ferrosilicon and magnesium production apparatus of the present invention melt reduction furnace 100, shredder 120, molding machine 130, heat reduction furnace 140, condenser 150, vacuum pump 160 It may include a ferrosilicon molding machine (170).

상기 용융환원로(100)는 마그네슘슬래그에 포함된 규석과 철 산화물로 페로실리콘을 제조한다. 이를 위해 상기 용융환원로(100)에는 마그네슘슬래그와 철광석이 원료로 투입될 수 있다. 상기 용융환원로(100)는 코크스로 또는 전기로로 구현될 수 있다. 상기 코크스로 또는 전기로는 마그네슘슬래그와 철광석을 1400℃~1600℃까지 가열, 용융, 탄소로 환원하여 슬래그 속에 포함된 규석과 철광석을 페로실리콘 용액으로 제조한다. 이를 위해 상기 코크스로 또는 전기로에는 미분탄 공급을 위한 투입 장치가 구비될 수 있다. The melt reduction furnace 100 produces ferrosilicon from the silica and iron oxide contained in the magnesium slag. To this end, magnesium slag and iron ore may be introduced into the melt reduction reactor 100 as a raw material. The melt reduction furnace 100 may be implemented as a coke oven or an electric furnace. In the coke furnace or electric furnace, magnesium slag and iron ore are heated, melted, and reduced to carbon at 1400 ° C. to 1600 ° C. to produce silica and iron ore contained in the slag as a ferrosilicon solution. To this end, the coke oven or the electric furnace may be provided with an input device for supplying pulverized coal.

상기 용융환원로(100)의 페로실리콘 용액 및 페로실리콘슬래그는 래들(110)로 배출되며, 배출된 페로실리콘 용액은 페로실리콘 주형기(170)과 같은 성형 수단으로 투입 및 응고되어 소정의 크기로 형상화된 페로실리콘 괴가 얻어진다. 한편, 이 공정의 부산물인 페로실리콘슬래그는 후술하는 바와 같이 열환원로(140)의 원료로 사용된다.The ferrosilicon solution and the ferrosilicon slag of the melt reduction reactor 100 is discharged to the ladle 110, the discharged ferrosilicon solution is put and solidified by a molding means, such as a ferrosilicon molding machine 170 to a predetermined size Shaped ferrosilicon ingots are obtained. On the other hand, ferro-silicon slag as a by-product of this process is used as a raw material of the heat reduction furnace 140 as described later.

이어서, 페로니켈슬래그로부터 마그네슘의 회수를 위하여 파쇄기(120)로 페로니켈슬래그, 페로실리콘슬래그 및 형석을 포함하는 원료가 투입된다. 여기서, 형석은 환원 촉매로 작용한다. 본 발명에서 상기 파쇄기(120)로는 스크류 밀, 볼 밀 등 임의의 파쇄 수단이 사용될 수 있다. Subsequently, in order to recover magnesium from the ferronickel slag, a raw material including ferronickel slag, ferrosilicon slag, and fluorite is introduced into the crusher 120. Here, fluorspar acts as a reduction catalyst. In the present invention, the shredder 120 may be any shredding means such as a screw mill, a ball mill.

이어서, 성형기(130)에서 파쇄된 분말을 페로실리콘 용액과 혼합, 성형기(120)에서 성형체를 제조한다. 이 때, 상기 페로실리콘 용액은 성형체의 점결제로 작용한다. 본 발명에서 상기 페로실로콘 용액은 성형체 전체 중량 중 5~30 중량% 포함될 수 있다. 제조된 성형체는 열환원로(140)로 장입된다. Subsequently, the powder crushed in the molding machine 130 is mixed with the ferrosilicon solution to produce a molded body in the molding machine 120. At this time, the ferrosilicon solution acts as a binder of the molded body. In the present invention, the ferrocylocone solution may be included 5 to 30% by weight of the total weight of the molded body. The manufactured molded article is charged into the heat reduction furnace 140.

상기 열환원로(140)는 투입된 성형체를 가열하여 마그네슘을 증기화한다. 이를 위해 상기 열환원로(140)는 진공 상태로 유지된다. 이를 위해 상기 마그네슘 환원로(140)는 내열강의 반응관(141)을 포함하여 상기 반응관(141) 내부를 진공 상태로 유지하는 것일 수 있다. 상기 열환원로(140)는 마그네슘의 기화온도 이상 예컨대 1100℃~1250℃의 온도로 유지되어 마그네슘을 증기화한다. The heat reduction furnace 140 vaporizes magnesium by heating the injected molded body. To this end, the heat reduction path 140 is maintained in a vacuum state. To this end, the magnesium reduction furnace 140 may include a reaction tube 141 of heat resistant steel to maintain the inside of the reaction tube 141 in a vacuum state. The heat reduction furnace 140 is maintained at a temperature of more than the vaporization temperature of magnesium, for example, 1100 ℃ ~ 1250 ℃ vaporizes magnesium.

증기화 된 기체 마그네슘은 응축기(150)로 수집 및 응축되어 마그네슘 용액으로 제조한다. 마그네슘이 환원되고 남은 마그네슘슬래그는 다시 페로실리콘 제조를 위한 원료로 사용될 수 있다. The vaporized gas magnesium is collected and condensed in the condenser 150 to prepare a magnesium solution. Magnesium slag remaining after the reduction of magnesium may be used as a raw material for ferrosilicon production.

이상과 같이, 본 발명은 페로실리콘 제조공정과 마그네슘 제조공정의 부산물을 이용하여 페로니켈 슬래그로부터 마그네슘을 제조할 수 있게 된다. 또한, 본 발명에서는 두 공정을 연관시킴으로써, 마그네슘의 환원을 위한 산화칼슘 소스로 슬래그 내에 포함된 산화칼슘을 순환시키게 되어 자원의 효율적인 활용이 가능하다. 또한 본 발명에서는 마그네슘 환원로(140)의 부산물인 고온의 마그네슘슬래그를 코크스로/전기로(100)에서 사용할 수 있기 때문에 에너지 비용 측면에서도 효율적이다.As described above, the present invention enables the production of magnesium from ferronickel slag using the by-products of the ferrosilicon production process and magnesium production process. In addition, in the present invention by linking the two processes, it is possible to circulate the calcium oxide contained in the slag as a calcium oxide source for the reduction of magnesium to enable efficient use of resources. In addition, in the present invention, since the high temperature magnesium slag, which is a by-product of the magnesium reduction furnace 140, may be used in the coke oven / electric furnace 100, it is also efficient in terms of energy cost.

도 2는 본 발명의 다른 실시예에 따른 제조 공정을 개념적으로 도시한 도면이다. 2 is a view conceptually illustrating a manufacturing process according to another embodiment of the present invention.

도 2를 참조하면, 상기 용융환원로(200)는 용융로(210)와 환원로(220)로 구성될 수 있다. Referring to FIG. 2, the melt reduction furnace 200 may be composed of a melting furnace 210 and a reducing furnace 220.

상기 용융로(210)는 마그네슘슬래그 및 철광석을 포함하는 원료를 용융한다. 이 때, 상기 용융로(210)에는 원료와 함께 무연탄 및/또는 유연탄을 포함하는 연료가 투입된다. 물론, 그 외에도 상기 연료로는 중유와 산소가 사용될 수도 있다. The melting furnace 210 melts a raw material including magnesium slag and iron ore. At this time, a fuel containing anthracite coal and / or bituminous coal is injected into the melting furnace 210. Of course, heavy oil and oxygen may also be used as the fuel.

상기 환원로(220)는 상기 용융된 원료를 환원하여 페로실리콘 용액을 제조한다. 이를 위해 상기 환원로(220)는 미분탄과 같은 환원제의 투입을 위한 투입 장치를 구비할 수 있다. The reduction furnace 220 reduces the molten raw material to produce a ferrosilicon solution. To this end, the reduction furnace 220 may be provided with an input device for the input of a reducing agent such as pulverized coal.

도 3은 본 발명의 바람직한 실시예에 따른 용융환원로(200)를 모식적으로 도시한 도면이다. 3 is a view schematically showing a melt reduction furnace 200 according to a preferred embodiment of the present invention.

도 3을 참조하면, 용융로(210)는 상부에 있는 원료호퍼(211)를 통해 마그네슘슬래그, 철광석 또는 석탄(무연탄/유연탄)을 장입하도록 되어 있다. 또한 상기 용융로(210)는 중유 버너(212)를 통해 중유와 산소를 공급하고 투입된 석탄 등을 이용하여 1400~1600℃까지 원료를 가열하여 광물을 용해한다. Referring to Figure 3, the melting furnace 210 is to charge the magnesium slag, iron ore or coal (anthracite coal / coal briquettes) through the raw material hopper 211 in the upper portion. In addition, the melting furnace 210 supplies heavy oil and oxygen through the heavy oil burner 212 and heats raw materials to 1400 to 1600 ° C. using coal, etc., to dissolve minerals.

용융된 광물은 용액탕도(214)를 통해 용융로 하부의 환원로(220)로 흘러 들어가게 하고 환원로(220) 상부에 설치된 미분탄 호퍼(221)를 통해 미분탄이 환원로(220) 속으로 투입된다. 투입된 미분탄에 의해 광물은 환원되어 페로실리콘 용액으로 제조된다. 이때, 미분탄은 미분탄 밸브장치(222)에 의해 투입량이 조절되고 환원로(220)로 외부 공기의 침입을 막아 금속의 산화를 방지한다. The molten minerals are introduced into the reduction furnace 220 under the melting furnace through the solution bath 214 and the pulverized coal is introduced into the reduction furnace 220 through the pulverized coal hopper 221 installed at the upper portion of the reduction furnace 220. . The mineral is reduced by the injected pulverized coal to produce a ferrosilicon solution. At this time, the pulverized coal is controlled by the pulverized coal valve device 222 and prevents the oxidation of metal by preventing the intrusion of outside air into the reduction furnace 220.

페로실리콘 용액은 일정량이 환원로(220) 속에 모아지면 환원로 하부에 설치된 용액탕도(223, 224)를 통해 배출된다. 본 발명에서는 상기 환원로에 환원로 저면에 대하여 높이를 달리하는 최소한 둘 이상의 탕도가 제공된다. 이와 같이 복수의 탕도가 제공되는 이유는 다음과 같다. The ferrosilicon solution is discharged through the solution baths 223 and 224 installed in the lower part of the reduction furnace when a predetermined amount is collected in the reduction furnace 220. In the present invention, the reduction furnace is provided with at least two different turbidities varying in height with respect to the bottom of the reduction furnace. The reason why a plurality of runaways are provided as follows is as follows.

환원로 내의 철과 규소로 이루어진 용융액 중 철은 규소에 비해 높은 비중을 가지고 있어 용융액의 하층에 집중되며, 상층으로 갈수록 규소의 함량이 높아진다. Iron in the melt made of iron and silicon in the reduction furnace has a higher specific gravity than silicon and is concentrated in the lower layer of the melt, the higher the content of silicon toward the upper layer.

따라서, 일반적으로는 페로실리콘(규소성분: 75 wt%)의 제조시 최하부의 철 용액탕도(223)을 통해 페로실리콘 용융액을 모두 배출하여 이를 혼합함으로써 페로실리콘이 제조될 수 있다. Therefore, in general, the ferrosilicon can be prepared by discharging all the ferrosilicon melt through the bottom iron solution bath 223 when the ferrosilicon (silicon component: 75 wt%) is mixed.

그러나, 페로실리콘 중 규소성분이 높은 제품을 제조할 때는 철과 규소의 비중 차를 이용하여 페로실리콘 용액탕도(224)를 통해 용액을 배출하고 철 용액탕도(224)을 통해 배출되는 용융액은 용융로(210)에 재장입함으로써 규소 성분비중이 높은 페로실리콘을 제조할 수 있다. 반대로, 하층의 철 함량이 높은 페로실리콘만을 이용하는 경우 규소 함량이 매우 낮은 페로실리콘의 제조가 가능하다. 본 발명에서는 이와 같은 방식으로 에너지비용과 원료비용을 절감시키면서 제품용도에 따라 페로실리콘의 규소성분을 18~96%까지 조정할 수 있다. However, when manufacturing a high silicon component of the ferrosilicon, the melt is discharged through the ferrosilicone solution type (224) by using the difference in specific gravity of iron and silicon, and the melt discharged through the iron solution type (224) is By reloading into the melting furnace 210, it is possible to produce ferrosilicon having a high silicon component specific gravity. On the contrary, when only ferrosilicon having a high iron content in the lower layer is used, it is possible to prepare ferrosilicon having a very low silicon content. In the present invention, it is possible to adjust the silicon component of the ferro silicon by 18 ~ 96% according to the product usage while reducing the energy cost and raw material cost in this way.

더욱이, 통상적인 페로실리콘의 제조에서는 규소성분이 높을수록 용융 온도가 높아 전기로 조업을 제외하고는 사실상 제조가 어려우나, 본 발명의 용융 환원로(200)는 이상과 같은 방법으로 규소 성분이 높은 페로실리콘을 제조할 수 있게 된다.Furthermore, in the manufacture of conventional ferrosilicon, the higher the silicon component, the higher the melting temperature, and thus it is virtually difficult to manufacture except for the operation of the electric furnace. However, the melt reduction furnace 200 of the present invention has a high ferrosilicon component as described above. Silicon can be manufactured.

본 발명에 첨부된 도면은 본 발명의 기술 사상을 한정하기 위한 것이 아니라 설명하기 위한 것이고, 이러한 첨부된 도면에 의하여 본 발명의 기술 사상의 범위가 한정되는 것은 아니다. 본 발명의 보호 범위는 아래의 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.The drawings attached to the present invention are not intended to limit the technical idea of the present invention but to explain, and the scope of the technical idea of the present invention is not limited by the accompanying drawings. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (15)

페로니켈슬래그, 페로실리콘슬래그, 페로실리콘 및 마그네슘 환원촉매를 포함하는 제1 원료를 배합하는 단계;Blending a first raw material comprising ferronickel slag, ferrosilicon slag, ferrosilicon and a magnesium reduction catalyst; 상기 배합된 제1 원료를 열환원로의 진공 분위기에서 기화하는 단계; Vaporizing the blended first raw material in a vacuum atmosphere of a heat reduction furnace; 상기 열환원로에서 기화된 마그네슘을 회수하는 단계; 및Recovering the vaporized magnesium from the thermal reduction furnace; And 상기 마그네슘슬래그로부터 페로실리콘 용액을 제조하는 단계를 포함하는 페로니켈슬래그로부터 마그네슘 제조 방법.Method for producing magnesium from ferronickel slag comprising the step of preparing a ferrosilicon solution from the magnesium slag. 제1항에 있어서,The method of claim 1, 상기 페로니켈슬래그는 마그네슘 화합물 및 철 성분을 포함하는 것을 특징으로 하는 페로니켈슬래그로부터 마그네슘 제조 방법.The ferronickel slag is magnesium production method from ferronickel slag, characterized in that it comprises a magnesium compound and iron. 제1항에 있어서,The method of claim 1, 상기 페로실리콘슬래그는 산화칼슘을 포함하는 것을 특징으로 하는 페로니켈슬래그로부터 마그네슘 제조 방법.The method of producing magnesium from ferronickel slag, characterized in that the ferrosilicon slag comprises calcium oxide. 제1항에 있어서,The method of claim 1, 상기 열환원로로부터 배출되는 마그네슘슬래그에 철광석을 포함하는 제2 원료를 배합하는 단계;Blending a second raw material including iron ore to magnesium slag discharged from the heat reduction furnace; 상기 제2 원료를 용융환원로에 투입하여 상기 마그네슘슬래그에 함유된 규석과 철광석을 용융, 페로실리콘으로 환원하는 단계; 및Reducing the silica and iron ore contained in the magnesium slag to melt and ferrosilicon by introducing the second raw material into a melt reduction reactor; And 상기 용융환원로에서 페로실리콘슬래그를 회수하여 상기 열환원로로 순환시키는 단계를 더 포함하는 것을 특징으로 하는 페로니켈슬래그로부터 마그네슘 제조 방법.The method for producing magnesium from the ferronickel slag characterized in that it further comprises the step of recovering the ferrosilicon slag in the melt reduction reactor to the heat reduction reactor. 제4항에 있어서,The method of claim 4, wherein 상기 용융환원로에서 페로실리콘 용액을 회수하는 단계를 더 포함하는 것을 특징으로 하는 페로니켈슬래그로부터 마그네슘 제조 방법.Method for producing magnesium from ferronickel slag further comprising the step of recovering the ferrosilicon solution in the melt reduction reactor. 제5항에 있어서,The method of claim 5, 상기 회수된 페로실리콘 용액의 최소한 일부를 상기 제1 원료와 혼합하여 성형하는 단계를 더 포함하는 것을 특징으로 하는 페로니켈슬래그로부터 마그네슘 제조 방법.And forming at least a portion of the recovered ferrosilicon solution by mixing with the first raw material to form the magnesium from ferronickel slag. 페로실리콘 제조를 위한 용융환원로 및 마그네슘 산화물을 환원하기 위한 열환원로를 포함하는 마그네슘 제조 장치에 있어서,In the magnesium production apparatus comprising a molten reduction furnace for the production of ferrosilicon and a thermal reduction furnace for reducing magnesium oxide, 상기 열환원로는 페로니켈슬래그로부터 마그네슘을 증기화하고,The heat reduction furnace vaporizes magnesium from ferronickel slag, 상기 용융환원로의 페로실리콘슬래그가 상기 열환원로의 환원보조제로 투입되는 것을 특징으로 하는 마그네슘 제조 장치.Magnesium production apparatus, characterized in that the ferro-silicon slag of the melt reduction furnace is added as a reducing aid to the heat reduction furnace. 제7항에 있어서,The method of claim 7, wherein 상기 페로실리콘슬래그는 상기 마그네슘 산화물의 환원을 위한 산화칼슘 성분의 공급원으로 작용하는 것을 특징으로 하는 마그네슘 제조 장치.The ferrosilicon slag is magnesium production apparatus, characterized in that acts as a source of calcium oxide component for the reduction of the magnesium oxide. 제7항에 있어서,The method of claim 7, wherein 상기 용융환원로는 코크스로 또는 전기로인 것을 특징으로 하는 페로실리콘 제조 장치.The melt reduction path is a ferrosilicon production apparatus, characterized in that the coke oven or electric furnace. 제7항에 있어서,The method of claim 7, wherein 상기 용융환원로는 용융로 및 상기 용융로와 제1 탕도가 연결되는 환원로를 포함하는 것을 특징으로 하는 페로실리콘 제조 장치.The molten reduction path is a ferro silicon manufacturing apparatus, characterized in that it comprises a melting furnace and a reducing furnace is connected to the melting furnace and the first turbidity. 제7항에 있어서,The method of claim 7, wherein 상기 환원로는 미분탄 투입을 위한 밸브 장치를 구비하는 것을 특징으로 하는 페로실리콘 제조 장치.The reduction furnace is ferro-silicon production apparatus characterized in that it comprises a valve device for pulverized coal injection. 제7항에 있어서,The method of claim 7, wherein 상기 환원로는 저면으로부터 용융된 페로실리콘의 회수를 위해 높이를 달리하는 최소한 제2 탕도 및 제3 탕도를 구비하는 것을 특징으로 하는 페로실리콘 제조 장치.The reduction furnace is a ferrosilicon manufacturing apparatus, characterized in that it comprises at least a second and third runway of varying height for recovery of the molten ferrosilicon from the bottom. 제7항에 있어서,The method of claim 7, wherein 상기 열환원로의 마그네슘슬래그가 상기 용융환원로로 순환되는 것을 특징으로 하는 마그네슘 제조 장치.Magnesium slag of the thermal reduction furnace is circulated to the molten reduction reactor magnesium production apparatus. 마그네슘 제조의 부산물인 마그네슘슬래그와 철광석을 원료로 페로실리콘을 환원하는 용융환원로에 있어서,In the melting reduction furnace for reducing the ferrosilicon as a raw material of magnesium slag and iron ore as a by-product of magnesium production, 상기 용융환원로는 용융로 및 환원로를 포함하며,The melt reduction furnace includes a melting furnace and a reducing furnace, 상기 용융로와 환원로는 페로실리콘 용액의 이송을 위한 제1 탕도를 통해 연결된 것을 특징으로 하는 용융환원로.The melting furnace and the reduction furnace melt reduction furnace, characterized in that connected through the first run for the transfer of the ferrosilicon solution. 제14항에 있어서,The method of claim 14, 상기 환원로는 페로실리콘 용액의 배출을 위해 저면으로부터 위치를 달리하는 제2 및 제3 탕도를 포함하는 것을 특징으로 하는 용융환원로.The reduction furnace melt reduction furnace, characterized in that it comprises a second and third runway that differs in position from the bottom for the discharge of the ferrosilicon solution.
PCT/KR2013/003484 2012-04-27 2013-04-24 Method for preparing ferro-silicon and magnesium using ferro-nickel slag, preparation apparatus used therefor, and smelting reduction furnace Ceased WO2013162269A1 (en)

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