KR20080112818A - How to recover valuable metals from steelmaking by-products - Google Patents
How to recover valuable metals from steelmaking by-products Download PDFInfo
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- KR20080112818A KR20080112818A KR20070061740A KR20070061740A KR20080112818A KR 20080112818 A KR20080112818 A KR 20080112818A KR 20070061740 A KR20070061740 A KR 20070061740A KR 20070061740 A KR20070061740 A KR 20070061740A KR 20080112818 A KR20080112818 A KR 20080112818A
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- 239000006227 byproduct Substances 0.000 title claims abstract description 36
- 238000009628 steelmaking Methods 0.000 title claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 150000002739 metals Chemical class 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 46
- 229910001021 Ferroalloy Inorganic materials 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000004484 Briquette Substances 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000571 coke Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 238000011946 reduction process Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003830 anthracite Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 235000013379 molasses Nutrition 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- -1 scale Substances 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 230000032683 aging Effects 0.000 claims 1
- 230000000887 hydrating effect Effects 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 239000011651 chromium Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000011572 manganese Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
본 발명은 제강공정 부산물에 포함된 유가 금속을 효율적으로 회수하는 방법 관한 것으로서, 본 발명에 따라 제강공정 부산물을 단광(briquette)으로 성형하여 건조 및 배소(roasting) 공정을 거쳐 환원전기로에서 용융시킴으로써 합금철을 제조하는 방법에 따르면 유가 금속을 매우 경제적이고도 효과적으로 회수하여 이용할 수 있다. 또한, 제강공정 부산물에 금속 원광을 혼합하여 본 발명에 따라 단광으로 성형한 후 배소공정을 거쳐 합금철을 제조할 경우, 보다 높은 함량의 유가 금속을 회수할 수 있다.The present invention relates to a method for efficiently recovering valuable metals contained in the steel-making process by-products. According to the iron production method, valuable metals can be recovered and used very economically and effectively. In addition, when the metal ore is mixed with the steelmaking process by-products to form briquettes according to the present invention, and then, through the roasting process to produce ferroalloy, it is possible to recover a valuable metal of a higher content.
Description
본 발명은 제강공정 부산물로부터 유가 금속 성분을 효과적이고 경제적으로 회수할 수 있는 방법에 관한 것이다.The present invention relates to a method for effectively and economically recovering valuable metal components from steelmaking by-products.
일반적으로 스테인레스강은 전기로에서 고철과 합금철을 용해하여 용강을 만들고, 이 용강을 정련로에서 정련하여 제조하고 있다. 이러한 스테인레스강 제조공정에서 공정별로 여러 가지 부산물이 발생된다. 전기로에서는 전기로 더스트가 발생되고, 정련로에서는 사이클론에서 굵은 입자의 정련로 중더스트가, 집진기에서는 미분의 정련로 더스트가 집진된다.In general, stainless steel is produced by melting molten iron and ferroalloy in an electric furnace to make molten steel, and refining the molten steel in a refining furnace. In this stainless steel manufacturing process, various by-products are generated. In an electric furnace, dust is generated in an electric furnace, in a refining furnace, dust is collected in a refining furnace of heavy particles in a cyclone, and dust is collected in a refining refiner in a dust collector.
이러한 더스트 중에는 철 성분 외에도 Mo, Mn, Cr, Ni 등의 유가 금속이 다량 포함되어 있으며, 이들은 성형체로 제조되어 로에서 용해하여 합금철은 회수하고 발생되는 슬래그는 토건용 원료로 재활용되고 있다.The dust contains a large amount of valuable metals such as Mo, Mn, Cr, Ni, etc., in addition to the iron component, these are produced in a molded body, melted in the furnace to recover the ferroalloy, and the generated slag is recycled as a raw material for construction.
한국특허공개 제2006-70022호에는 제철 부산물을 이용한 단광(briquette)의 제조방법 및 이 단광을 용융시키는 방법을 개시하고 있다. 상기 특허에 따르면 제 철 부산물인 더스트로부터 성형된 단광을 용융환원로에 도입하여 크롬 합금철을 제조하는데, 용융환원 공정을 거친 유가 금속 산화물들의 환원율이 낮고 로에서의 처리시간이 긴 것으로 인해 합금철 제조 단가가 너무 높다는 문제점이 있다.Korean Patent Laid-Open Publication No. 2006-70022 discloses a method of manufacturing briquettes using steel by-products and a method of melting the briquettes. According to the patent, chromium alloy iron is produced by introducing briquettes formed from dust, which is a by-product of iron, into a melting reduction furnace, which has a low reduction rate of valuable metal oxides that have undergone the melting reduction process and has a long processing time in the furnace. There is a problem that the manufacturing cost is too high.
따라서, 본 발명의 목적은 상기와 같은 문제점을 해결하여 환원율이 높으면서도 제조 시간을 줄일 수 있는 새로운 유가금속 회수 방법을 제공하는데 있다.Accordingly, an object of the present invention is to provide a new valuable metal recovery method that can solve the above problems and reduce the production time while having a high reduction rate.
상기 목적을 달성하기 위하여 본 발명에서는, 1) 필요에 따라 금속 성분의 원광이 혼합된 제강공정 부산물을 단광(briquette)으로 성형하는 단계; 2) 성형된 단광을 배소(roasting)시키는 단계; 및 3) 배소된 단광을 용융환원시키는 단계를 포함하는, 제강공정 부산물로부터 유가금속을 회수하는 방법을 제공한다.In order to achieve the above object, in the present invention, 1) forming a by-product steelmaking process by mixing the raw ore of the metal component into briquette; 2) roasting the formed briquettes; And 3) melt-reducing the roasted briquettes.
이하, 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명에서 제강공정 부산물이라 함은 제강공정에서 발생되는 모든 종류의 더스트, 스케일, 폐 샷볼(waste shot ball), 산화 철 등을 포함한다. 상기 제강공정 부산물은 주성분으로 철 성분을 포함하고 있으며, 그 외에도 Ni, Cr, Mn, Mo 등의 유가금속을 다량 포함하고 있다.By-products of the steelmaking process in the present invention includes all kinds of dust, scale, waste shot ball, iron oxide and the like generated in the steelmaking process. By-products of the steelmaking process include iron as a main component, and in addition, it contains a large amount of valuable metals such as Ni, Cr, Mn, and Mo.
본 발명에서 단광은 제강공정에서 발생되는 미립 부산물을 괴상으로 만든 것 을 의미하며, 본 발명에 사용되는 단광은 공지된 모든 방법으로 성형될 수 있다. 예를 들면 제강공정 부산물을 수화처리 및 숙성시킨 후 바인더와 혼합하여 볼(ball) 형태로 단광을 성형할 수 있다.In the present invention, briquettes means that the fine by-products generated in the steelmaking process are made in a mass, and the briquettes used in the present invention may be formed by any known method. For example, the by-products of the steelmaking process may be hydrated and aged, and then mixed with a binder to form briquettes in the form of balls.
상기 단광 성형시, 최종 수득되는 합금철에서 Ni, Cr, Mn, Mo 등의 유가 금속의 성분이 수효되는 함량에 미달될 경우, 필요 금속의 원광을 분쇄하여 상기 부산물과 혼합 혼련하여 단광을 성형할 수도 있다.In the briquette forming, if the components of the valuable metals such as Ni, Cr, Mn, and Mo in the final ferroalloy are less than the effective content, the ore of the required metal may be pulverized and mixed and kneaded with the byproduct to form briquettes. It may be.
상기 단광 성형시 바인더로는 당밀, 물유리, 녹말분 또는 이들의 혼합물을 제강공정 부산물 중량을 기준으로 3 내지 10 중량%의 양으로 사용할 수 있고, 또한 단광으로부터 회수할 금속 원소의 환원을 최적화하기 위해서는 단광 성형시 1 내지 10 mm 입경의 코크스, 석탄, 흑연과 같은 첨가제를 제강공정 부산물 중량을 기준으로 10 내지 15 중량% 범위의 양으로 첨가하여 성형하는 것이 바람직하다. 상기 바인더(점결제)는 성형된 단광의 보관, 운반 및 미분화 방지를 위해 사용된다.As the binder for forming briquettes, molasses, water glass, starch powder, or a mixture thereof may be used in an amount of 3 to 10% by weight based on the weight of the by-product of the steelmaking process, and to optimize reduction of metal elements to be recovered from briquettes. In the briquette forming, it is preferable to add and add an additive such as coke, coal, and graphite having a particle size of 1 to 10 mm in an amount ranging from 10 to 15 wt% based on the weight of the steelmaking by-product. The binder (binder) is used to store, transport and prevent the differentiation of the formed briquettes.
상기 단광은 후속 취급 및 배소 공정에 필요한 충분한 강도와 기공도, 수분 및 건조 소성 변화에 따른 용적 안정성을 갖는 것이 바람직하다. 본 발명에 사용되는 단광은 20 내지 80 mm 범위, 바람직하게는 30 내지 70 mm 범위의 평균입도, 1.5 내지 3.0 g/cm3 범위의 벌크 밀도 및 3 내지 8 중량% 범위의 수분함량을 갖는 것이 적합하다.It is preferred that the briquettes have sufficient strength and porosity, volumetric stability with varying moisture and dry plasticity required for subsequent handling and roasting processes. Briquettes used in the present invention are suitably having an average particle size in the range of 20 to 80 mm, preferably in the range of 30 to 70 mm, a bulk density in the range of 1.5 to 3.0 g / cm 3 and a water content in the range of 3 to 8% by weight. Do.
또한, 본 발명에 있어서 상기 단광은 5 내지 30 kg/㎠ 범위의 건조압축 강도를 갖는 것이 바람직하다.In addition, in the present invention, the briquettes preferably have a dry compressive strength in the range of 5 to 30 kg / cm 2.
본 발명에서 특징적으로 수행하는 배소(roasting) 공정은 상기 단광을 용융환원시키는데 적합하도록 만드는 제련 예비공정이라고 할 수 있다.Roasting process characteristically carried out in the present invention can be said to be a smelting preliminary process to make the briquette suitable for melt reduction.
본 발명에 따르면, 상기 단광을 30 내지 100 ℃ 범위의 온도에서 우선 건조시킨 후, 600 내지 1,100 ℃ 범위의 온도에서 2 내지 10시간, 바람직하게는 4 내지 6 시간 동안 배소시킬 수 있다. 본 발명에 따르면, 단광 스택(stack)에 착화를 하면 일단 발화 후에는 단광 전체에 연속적으로 점화가 일어나므로 추가의 열을 가하지 않아도 단광 전체가 균일하게 배소될 수 있다. 착화시간은 보통 10 내지 50 분 범위일 수 있다.According to the invention, the briquettes may first be dried at a temperature in the range of 30 to 100 ° C. and then roasted at a temperature in the range of 600 to 1,100 ° C. for 2 to 10 hours, preferably 4 to 6 hours. According to the present invention, once the ignition stack is ignited, the ignition occurs continuously throughout the briquettes once ignited, so that the entire briquettes can be uniformly distributed without additional heat. Ignition time can usually range from 10 to 50 minutes.
배소된 단광을 이어서 용융환원 공정에 도입하게 되는데, 용융환원 공정은 당분야에 이미 공지된 바와 같이 용융환원로에서 수행할 수 있다. 이때 용융환원로 내부의 온도는 600 내지 1,100 ℃ 범위일 수 있다.The roasted briquettes are then introduced to a melt reduction process, which may be performed in a melt reduction furnace as is already known in the art. At this time, the temperature inside the melt reduction furnace may be in the range of 600 to 1,100 ℃.
상기 용융환원 공정에 배소된 단광을 도입할 때 환원제를 함께 도입하는 것이 바람직할 수 있다. 상기 환원제로는 카본, 코크스, 무연탄, SiC 등을 사용할 수 있고, 상기 환원제는 5 내지 50 mm, 바람직하게는 20 내지 50 mm 범위의 평균 입도를 가질 수 있으며, 사용량은 배소된 단광 중량을 기준으로 5 내지 20 중량% 범위가 적합하다.When introducing briquettes roasted in the melt reduction process, it may be desirable to introduce a reducing agent together. The reducing agent may be carbon, coke, anthracite, SiC, etc., the reducing agent may have an average particle size in the range of 5 to 50 mm, preferably 20 to 50 mm, the amount used is based on the burned briquette weight A range of 5 to 20% by weight is suitable.
본 발명에 따르면, 단광을 배소 처리한 후 용융환원시킴으로써 단광내 K, Na 및 결정수에 의한 환원로내 취출 현상을 방지할 수 있어 환경 보호 면에서도 유리하고, 상기 배소 공정을 통해 니켈은 전체가, 크롬의 경우는 약 40% 까지, 망간의 경우는 약 30% 이상 미리 환원된 상태로 후속 환원로에 투입되므로, 유가 금속인 니켈, 크롬, 망간 등의 회수율을 크게 증대시킬 수 있고, 환원로에서의 전기 소모량을 현저히 감소시킬 수 있다.According to the present invention, by roasting the briquettes and then melt-reducing, it is possible to prevent the intake of the reduction furnace by the K, Na and crystal water in the briquettes, which is advantageous in terms of environmental protection. In the case of chromium, up to about 40% of chromium and about 30% or more of manganese are introduced into the subsequent reduction furnace in a pre-reduced state, thereby greatly increasing the recovery of valuable metals such as nickel, chromium and manganese. The consumption of electricity at can be significantly reduced.
상기와 같이 용융환원된 단광을 통상의 방법으로 냉각하여 합금철을 제조할 수 있다.As described above, the melt-reduced briquettes may be cooled by a conventional method to produce ferroalloy.
이하, 본 발명을 하기 실시예에 의거하여 보다 상세하게 설명한다. 단, 하기 실시 예는 본 발명을 예시하기 위한 것일 뿐 한정하지는 않는다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail based on the following Example. However, the following examples are not intended to limit the invention only.
실시예Example
제강공정 부산물을 하기 표 1과 같이 기타 부형제와 혼합하여 성형함으로써 하기 표 2와 같은 물성을 가진 단광을 제조하였다.The briquettes having physical properties as shown in Table 2 were prepared by mixing and forming steel by-products with other excipients as shown in Table 1 below.
상기 단광 1.5 톤의 스택 (박스사이즈 1.2 x 1.2 x 1.0 m3)을 SiC 50 kg과 혼합하고 여기에 생석회(CaO) 50 kg을 가하여 생성 혼합물 (수분함량 0.5% 이하)을 30~100 ℃에서 1~3시간 동안 건조하였다. 건조된 단광 스택을 하부에서 40 분 동안 착화한 후 6시간 동안 유지함으로써 배소(배소 온도 대략 600~1,100 ℃)시켰다.The stack of 1.5 tonnes of briquettes (box size 1.2 x 1.2 x 1.0 m 3 ) was mixed with 50 kg of SiC and 50 kg of quicklime (CaO) was added to the resulting mixture (water content of 0.5% or less) at 30 to 100 ° C. Dried for ˜3 hours. The dried briquette stack was roasted for 40 minutes at the bottom and then roasted by holding for 6 hours (roasting temperature approximately 600-1100 ° C.).
이어서, 배소된 단광을 20 내지 50 mm 입도의 SiC 40 kg과 함께 용융환원로에 도입하여 1,400~1,800 ℃의 환원로 온도에서 4 내지 24 시간동안 용융환원시킨 다음 출선함으로써 상온으로 냉각시켜 합금철을 회수율 40%로 회수하였다.Subsequently, the roasted briquettes were introduced into a melt reduction furnace with 40 kg of SiC having a particle size of 20 to 50 mm, melt reduced for 4 to 24 hours at a reduction furnace temperature of 1,400 to 1,800 ° C., and cooled to room temperature by leaving out. Recovery was performed at 40% recovery.
상기에서 단광을 용융환원처리 후에 수득된 합금철 중의 주요 금속성분의 함량을 하기 표 3에 나타내었다.Table 3 shows the contents of the main metal components in the ferroalloy obtained after the melt reduction treatment of briquettes.
상기 표 3으로부터 본 발명에 따르면 유가 금속인 Cr, Ni, Mn의 함량이 매우 높은 합금철을 제조할 수 있음을 알 수 있다.According to the present invention from Table 3, it can be seen that the ferroalloy having a high content of valuable metals Cr, Ni, and Mn can be manufactured.
비교예Comparative example
상기 표 2에 나타낸 물성의 단광 1.5톤을, 실시예에서와 같은 배소공정을 거치지 않고, 바로 SiC와 함께 용융환원로에 도입하여 용융환원 및 냉각 공정을 거쳐 합금철을 회수율 40%로 회수하였다.1.5 tonnes of briquettes of the physical properties shown in Table 2 were directly introduced into the melting reduction furnace together with SiC without undergoing the roasting process as in the example, and recovered the ferroalloy at a recovery rate of 40% through the melting reduction and cooling processes.
상기와 같이 배소 공정을 거치지 않은 공정의 경우(비교예)와 본 발명에 따라 배소 공정을 거치는 경우(실시예)의 전체 단광 처리량 및 용융환원로에서의 전력 사용량 등을 비교하여 하기 표 4에 나타내었다.As shown in Table 4 below, the total briquette throughput and the power consumption in the melt reduction furnace in the case of the process without the roasting process (Comparative Example) and the case of the roasting process according to the present invention (Example) are compared. It was.
상기 표 4로부터, 본 발명에 따르면, 단광을 배소 처리한 후 용융환원시킴으로써 용융환원에 필요한 전력의 사용량을 현저히 감축시킬 수 있음을 알 수 있다.From Table 4, it can be seen that according to the present invention, the amount of power required for melt reduction can be significantly reduced by melting and reducing briquettes.
본 발명에 따르면, 제강공정 부산물로부터 유가금속을 회수하는 방법에 있어서 환원율이 낮고 전력 소모량이 많은 기존의 문제점을 해결하여 환원율이 높으면서도 처리 시간 및 소요 전력을 크게 줄일 수 있다.According to the present invention, in the method of recovering the valuable metals from the steelmaking process by-products, it is possible to solve the existing problems of low reduction rate and high power consumption, and to greatly reduce processing time and power consumption while reducing the reduction rate.
Claims (20)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101289251B1 (en) * | 2011-09-22 | 2013-07-24 | 주식회사 은하에어테크 | Equipments and method for titanium using food wastes |
| KR101475322B1 (en) * | 2012-12-28 | 2014-12-22 | (주)에스엔엔씨 | Recycling material for manufacturing ferro-nickel and manufacturing method thereof |
| ES2535688A1 (en) * | 2014-08-06 | 2015-05-13 | Hormigones Y Morteros Agote, S.L.U. | Briquette manufacturing process from pickle and briquette sludge obtained by said process (Machine-translation by Google Translate, not legally binding) |
| KR20150068568A (en) * | 2013-12-12 | 2015-06-22 | 이태수 | Composition of silicone-carbon based thermic reducing agent and the manufacturing method thereof |
-
2007
- 2007-06-22 KR KR20070061740A patent/KR20080112818A/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101289251B1 (en) * | 2011-09-22 | 2013-07-24 | 주식회사 은하에어테크 | Equipments and method for titanium using food wastes |
| KR101475322B1 (en) * | 2012-12-28 | 2014-12-22 | (주)에스엔엔씨 | Recycling material for manufacturing ferro-nickel and manufacturing method thereof |
| KR20150068568A (en) * | 2013-12-12 | 2015-06-22 | 이태수 | Composition of silicone-carbon based thermic reducing agent and the manufacturing method thereof |
| ES2535688A1 (en) * | 2014-08-06 | 2015-05-13 | Hormigones Y Morteros Agote, S.L.U. | Briquette manufacturing process from pickle and briquette sludge obtained by said process (Machine-translation by Google Translate, not legally binding) |
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