KR100289194B1 - Method for recycling furnace sludge with a converter scrap - Google Patents
Method for recycling furnace sludge with a converter scrap Download PDFInfo
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- KR100289194B1 KR100289194B1 KR1019960026589A KR19960026589A KR100289194B1 KR 100289194 B1 KR100289194 B1 KR 100289194B1 KR 1019960026589 A KR1019960026589 A KR 1019960026589A KR 19960026589 A KR19960026589 A KR 19960026589A KR 100289194 B1 KR100289194 B1 KR 100289194B1
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- blast furnace
- sludge
- converter
- furnace sludge
- scrap
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- 239000010802 sludge Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004064 recycling Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 62
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 238000009628 steelmaking Methods 0.000 claims description 15
- 239000000155 melt Substances 0.000 claims 1
- 239000000047 product Substances 0.000 description 20
- 238000006722 reduction reaction Methods 0.000 description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 101000993059 Homo sapiens Hereditary hemochromatosis protein Proteins 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Drying Of Solid Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
본 발명은 고로 슬러지를 전로 스크랩으로 재활용하는 방법에 관한 것으로, 특히 제선공정에서 발생되는 슬러지중에 함유된 철성분을 재활용하기 위해 고로 슬러지를 고형화 처리하여 전로에 스크랩 대용으로 사용하여 함철성분을 환원시키는 고로 슬러지를 전로 스크랩으로 재활용하는 방법에 관한 것이다.The present invention relates to a method for recycling blast furnace sludge as a converter scrap, and in particular, in order to recycle the iron component contained in the sludge generated in the steelmaking process to solidify the blast furnace sludge to reduce the iron content by using as a substitute for scrap in the converter A method for recycling blast furnace sludge into converter scrap.
일반적으로, 고로 슬러지는 제선 공정에서 소결광과 코크스 및 용제의 환원 반응시 배출되는 배기가스중의 미세 더스트를 습식으로 포집한 것으로, 철성분을 함유하는 철산화물 및 비금속 화합물로 구성된 복합화합물이다.In general, blast furnace sludge is a composite compound composed of iron oxides and non-metallic compounds containing iron components, which is a wet collection of fine dust in the exhaust gas discharged during the reduction reaction of sintered ore, coke and solvent in a steelmaking process.
고로의 반응물은 소결광(Fa203), 코크스(C), 생석회(CaO)등이고, 이들의 환원 반응후 생성되는 것은 용선, 고로슬래그, 고로가스 및 고로슬러지 등이다.The reactants of the blast furnace are sintered ore (Fa 2 O 3 ), coke (C), quicklime (CaO) and the like, and these are produced after the reduction reaction, such as molten iron, blast furnace slag, blast furnace gas and blast furnace sludge.
고로슬러지의 조성은 다음 표 1과 같다.The composition of the blast furnace sludge is shown in Table 1 below.
[표 1]TABLE 1
상기 표 1과 같이 고로 슬러지는 유가성분인 다량의 철분, 탄소와 CaO가 대부분이며, 여기에 제철공정에서 일반적으로 유해 성분인 S와 Zn과 포함되어 있다.As shown in Table 1, the blast furnace sludge is a large amount of valuable components of iron, carbon and CaO, which are generally included in the steelmaking process with S and Zn.
이러한 성질의 고로 슬러지는 제선공정에서 다량 발생하기 때문에 그 처리 문제가 매우 중요하다.Blast furnace sludge of this nature is generated in a large amount in the steelmaking process, so the treatment problem is very important.
기존의 고로 슬러지 처리방법은, 슬러지중에 포함되어 있는 S, Zn, 수분 등으로 인해 별도의 처리 없이는 제철공정 및 타 산업에 재활용하기가 어렵기 때문에, 탈Zn설비에서 슬러지중의 Zn농도를 일정수준 이하로 제조한 후, 이것을 고로나 소결공장의 원료로 사용하지만, 탈Zn 설비의 투자비 및 운영비용이 매우 크기 때문에 재활용에 따른 경제성을 확보하기가 곤란하므로, 현실적으로 조업에 적용하기는 거의 불가능하다.Conventional blast furnace sludge treatment method is difficult to recycle to steelmaking process and other industries without separate treatment due to S, Zn, water, etc. contained in sludge, so the concentration of Zn in sludge in de-Zn facility It is used as a raw material of a blast furnace or a sintering plant after manufacturing below. However, since the investment cost and operating cost of the de-Zn facility are very large, it is difficult to secure economics due to recycling, and thus it is practically impossible to apply it to an operation.
그리고 탈Zn 처리를 하지 않는 고로슬러지를 밀폐형인 고로나 소결로에 사용할 경우, Zn이 고온에서 증발되면서 외부로 배출되지 못하고 로벽면부에 부착됨으로서 로내의 반웅 물질의 흐름을 저해시켜 조업 간섭의 원인이 되므로 사용이 곤란하다.When blast furnace sludge without de-Zn treatment is used in a closed blast furnace or sintering furnace, Zn is evaporated at a high temperature and is not discharged to the outside. This is difficult to use.
이로인해, 고로 슬러지는 통상적으로 자연 건조하여 수분을 일정 수준 이하로 제거한 후 바인더로 시멘트를 소량 첨가하여 적당량 크기로 고형화 작업을 시킨후 소성하여 일정 수준 이상의 강도가 확보되면 바다에 매립하고 있다.Due to this, the blast furnace sludge is usually dried naturally to remove moisture below a certain level, and then a small amount of cement is added to the binder to solidify to an appropriate amount and then fired to be buried in the sea when a certain level or more strength is secured.
통상의 처리 방법으로 고형화하여 바다에 매립된 고로슬러지는 고로슬러지 중의 생석회가 완전히 수화반응이 되지 않았기 때문에 매립 후 수개월에 걸쳐 수분과 반응하여 수화반응이 진행되면서 알칼리 화합물인 수산화 칼슘(Ca(OH)2)으로 되며 이에따라 부피 팽창에 의한 매립화된 입자들이 발생하여 수질을 오염시키며, 또한 고로슬러지 중의 Zn이 바다에 매립된 상태에서 장기간에 걸쳐 농축되면서 수질을 오염시킬 수 있다.The blast furnace sludge solidified by the conventional treatment method was buried in the sea, and the quicklime in the blast furnace sludge was not fully hydrated. 2 ) landfilled particles are generated by volume expansion and contaminate the water quality. In addition, Zn in blast furnace sludge can be contaminated with water as it is concentrated in the sea for a long time.
일반적으로, 분화현상이나 수화현상이 일어나면 고형화품이 팽창에 의해 파쇄되므로 유해물질이 수질로 농출되는 현상을 가속화시켜 환경 공해 유발 및 자원화를 저해시키고 있는 것이다.In general, when differentiation or hydration occurs, the solidified product is crushed by expansion, thereby accelerating the phenomenon that harmful substances are concentrated in the water quality, thereby inhibiting environmental pollution and resource recycling.
본 발명은 상기한 문제점들을 해결하기 위한 것으로, 고로 슬러지를 처리함에 있어 다른 함철 폐기물과 시멘트를 첨가하여 고형화품으로 제조한 후 이를 제강공정인 전로에 스크랩 대용으로 사용함으로써 고로슬러지중에 있는 함철성분들을 환원시켜 용강으로 만들어 환경 오염 방지 및 재활용에 의한 부가가치를 창출할 수 있는 고로슬러지를 전로 스크랩으로 재활용하는 방법을 제공하는데 그 목적이 있다.The present invention is to solve the above problems, in the treatment of blast furnace sludge by adding other iron-containing waste and cement to produce a solidified product and then use it as a substitute for scrap in the converter steelmaking process by using the iron-containing components in the blast furnace sludge The purpose is to provide a method of recycling blast furnace sludge to converter scrap, which can be reduced to molten steel to create added value by preventing pollution and recycling.
상기한 목적을 달성하기 위해 본 발명은 제선공정인 고로에서 발생되는 고로슬러지를 수분함량이 중량%로 약15% 되도록 건조하는 단계와; 건조된 상기 고로슬러지에 밀스케일을 중량%로 20∼70%를 혼합하는 단계와; 밀스케일을 혼합한 상기 고로슬러지에 시멘트를 중량%로 5~20%를 첨가하여 고형화하는 단계와; 고형화된 상기 고로슬러지를 스팀으로 양생시켜 수분함량을 중량%로 5% 이하로 하는 단계와;In order to achieve the above object, the present invention comprises the steps of drying the blast furnace sludge generated in the blast furnace blast furnace process to a water content of about 15% by weight; Mixing 20 to 70% by weight of a mill scale to the dried blast furnace sludge; Solidifying by adding 5% to 20% of cement by weight to the blast furnace sludge mixed with mill scale; Curing the solidified blast furnace sludge with steam to bring the water content to 5% or less by weight;
양생된 상기 고로슬러지를 제강공정인 전로에 스크랩과 함께 투입하여 용융환원시 취련시작 12분경과후부터 취련 말기까지 전로의 톤당 산소 사용량을 194∼200Nm2/hr로 하고, 산소 랜스의 높이를 6∼6.6mm로 취련하여 고로슬러지중 Fe성분을 용강으로 환원하는 단계로 이루어지는 것을 특징으로 하는 고로슬러지를 전로 스크랩으로 하는 재활용하는 방법을 제공한다.The cured blast furnace sludge is put together with scrap into the converter which is a steelmaking process, and the amount of oxygen per ton of the converter is 194-200 Nm 2 / hr from 12 minutes after the start of the blowdown at the time of melt reduction to the end of the blowdown, and the height of the oxygen lance is 6-. The present invention provides a method for recycling blast furnace sludge as converter scrap, which comprises a step of reducing the Fe component in the blast furnace sludge to molten steel by blowing to 6.6 mm.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명은 제선공정의 고로에서 발생하는 슬러지를 대기에서 수분을 일정수준 이하로 자연 건조 시킨후 Fe성분을 증대시킬 목적으로 다음 표 2에 나타낸 것과 같이 Fe함량이 높은 밀스케일등과 같이 제철공정 부산물을 첨가하여 전로에 사용이 가능하도록 일정 수중의 크기와 강도로 만들기 위해 시멘트를 첨가하여 고형화한 후, 고형화품의 강도 확보를 위해 충분히 양생을 시킨 다음, 제강공정인 전로에 스크랩의 대용으로 사용하고 전로에서는 적절한 취련패턴을 적용하여 고형화품중의 함철 성분을 최대한 환원시켜 용강으로 제조하게 된다.The present invention is for the purpose of increasing the Fe content after naturally drying the sludge generated in the blast furnace of the steelmaking process to a certain level or less in the air as shown in Table 2 below, such as mill scale, such as mill scales with high Fe content After solidifying by adding cement to make it into a certain size and strength in water so that it can be used in a converter, it is sufficiently cured to secure the strength of the solidified product, and then used as a substitute for scrap in the converter which is a steelmaking process. In order to reduce the iron content of the solidified products by applying the appropriate blow pattern as much as possible to manufacture the molten steel.
[표 2]TABLE 2
우선 본 발명에서는 제철소의 제선공정인 고로에서 발생되는 수분이 약 30% 정도 함유된 슬러지를 야적장으로 이송한 다음 시멘트와 다른 함철 물질등과 배합하여 고형화품을 제조하기에 적당하도록 수분을 약 16% 정도까지 건조시킨다.First, the present invention transfers the sludge containing about 30% of the moisture generated in the blast furnace of the steelmaking process to the yard and then mixes it with cement and other iron-containing materials to prepare the solidified product about 16%. Dry to the extent.
그런 다음 고형화품의 함철 성분을 증대시키기 위해 밀스케일을 20∼ 70%까지 첨가하며 적정한 강도를 확보하기 위해 시멘트를 5-20%까지 첨가하여 압축성형하여 고형화시켜 스팀으로 양생시켜서 고형화품 중의 수분 함량을 5% 이하로 하고, 강도를 80kg/㎠ 이상이 되도록 제조한다.Then, mill scale is added up to 20 ~ 70% to increase iron content of the solidified product, and cement is added up to 5-20% to secure the proper strength. It is made into 5% or less and manufactured so that intensity | strength may be 80 kg / cm <2> or more.
이때 밀스케일의 배합비를 20% 이하로 하면 고형화품중의 Fe성분이 50%이하가 되어 경제성이 없으며, 70%이상이 되면 고로슬러지의 배합비가 낮아져 바람직하지 않다.At this time, if the blending ratio of the mill scale is 20% or less, the Fe component in the solidified product is 50% or less, and there is no economical efficiency. If the blending ratio is 70% or more, the blending ratio of the blast furnace sludge is lowered, which is not preferable.
그리고 시멘트 배합비가 5% 이하일 경우 강도가 약하여 재사용을 위한 운반 등에 바람직하지 않다.And when the cement compounding ratio is 5% or less, the strength is not preferable, such as transport for reuse.
또한 양생후 고형화품중의 수분이 6%이상일 경우 전로내에 투입시 수분이 용강과 급격히 반응하여 폭발현상을 일으키므로 반드시 5%이하로 하여야 한다.In addition, if the moisture in the solidified product is more than 6% after curing, it should be less than 5% because the water reacts rapidly with molten steel when it is injected into the converter.
이와같이 제조된 고형화품은 안정한 상태로 제강공정인 전로에 스크랩 대용으로 사용이 가능하게 된다.The solidified product thus manufactured can be used as a substitute for scrap in the converter which is a steelmaking process in a stable state.
한편, 본 발명에 의해 제조된 고로슬러지의 고형화품에서 함철 성분을 환원시키기 위해서는 전로에 스크랩과 함께 투입후 용선을 장입하여 산소를 공급하면서 취련을 실시하면 섭씨 150도 이상의 고은에서 고형화품중의 FeO나 Fe203가 용선중의 탄소와 반응하여 CO가스로 되고 Fe성분은 환원되어 용강이 된다.On the other hand, in order to reduce the iron content in the solidified product of blast furnace sludge manufactured by the present invention, if the iron is charged with a molten iron after charging with a scrap into the converter after the injection of FeO in the solidified product at a solid silver of 150 degrees Celsius or more B Fe 2 O 3 reacts with carbon in the molten iron to form CO gas, and the Fe component is reduced to molten steel.
이하, 본 발명을 실시예를 통하여 구체적으로 설명한다.Hereinafter, the present invention will be described in detail through examples.
[실시예 1]Example 1
고로슬러지를 수분이 15%가 되도록 자연 건조시킨후, 고로슬러지 40%, 밀스케일 60%를 배합하고 여기에 시멘트 15%를 첨가하여 크기가 200×120×90mm가 되도록 압축 성형하여 고형화품을 만들고 이것을 스팀로에 장입하여 24시간 동안 양생을 실시하였다.Naturally dry the blast furnace sludge to 15% moisture, mix 40% blast furnace sludge and 60% mill scale and add 15% cement to it to make a solid product by compression molding to 200 × 120 × 90mm It was charged to a steam furnace and cured for 24 hours.
이렇게 하여 고형화품의 Fe함량은 60%, 수분은 6%, 강도는 85kg/㎠을 얻었다.In this manner, the Fe content of the solidified product was 60%, the moisture content was 6%, and the strength was 85 kg / cm 2.
이것을 제강공장으로 이송하여 300톤 전로에 스크랩과 함께 투입하고 용선을 장입후 산소를 공급하면서 취련을 실시하였다.It was transferred to a steelmaking plant, put into a 300 ton converter with scraps, charged with molten iron, and blown while supplying oxygen.
이때 고형화품중의 Fe성분의 환원 증대를 위해 취련 10분이후 부터 산소사용량을 60,000N㎥/Hr로 하고 탕면으로 부터 산소랜스의 높이를 2,000mm로 하여 조업을 실시하여 용강중으로의 Fe환원율을 측정하였다.At this time, in order to increase the reduction of the Fe component in the solidified product, the amount of oxygen used was 60,000 Nm3 / Hr after 10 minutes of blowing and the operation was carried out with the height of the oxygen lance 2,000 mm from the hot water surface to measure the Fe reduction rate into the molten steel. It was.
상기 조업에서 고형화품중의 Fe성분의 환원율을 측정하기 위한 측정법은 전로슬래그를 분석하여 전체 Fe성분을 알아냄으로서 Fe환원율을 측정하였다.The measuring method for measuring the reduction rate of the Fe component in the solidified product in the above operation was to determine the Fe reduction rate by analyzing the converter slag to find the total Fe component.
본 발명에 의해 제조된 수분 5%를 함유한 고형화품을 전로에 투입하고 용선을 장입 했을때 제강작업에서 가장 염려되는 용선의 폭발현상이 없었으며 기존의 취련 패턴과는 다른 상기 실시예로 취련을 실시한 결과 고형화품중의 Fe성분이 용강종으로의 Fe환원율이 96%를 얻었다.When the solidified product containing 5% moisture produced by the present invention was put into the converter and charged with molten iron, there was no explosion phenomenon of the molten iron which is most concerned in steelmaking operation, and the drilling was performed in the above-described embodiment different from the existing blow pattern. As a result, the Fe reduction rate of the Fe component in the solidified product to molten steel species was 96%.
이 결과로 부터 고로슬러지를 전로에 사용하여 고로슬러지 중에 함유되어 있는 Fe성분을 용강으로 대부분 환원 시킴으로서 스크랩 대용으로 자원 재활용이 가능함을 알 수 있었다.From this result, it was found that the recycling of resources as a substitute for scrap by reducing the majority of Fe components contained in the blast furnace sludge to molten steel by using the blast furnace sludge in the converter.
[실시예 2]Example 2
다음의 표 3과 같은 고형화품 제조 및 취련 패턴을 제외하고는 [실시예 1]과 동일한 방법으로 전로에 스크랩 대용으로 사용 한 다음, 용강으로의 Fe환원율을 측정하고, 그 결과를 하기 표 3에 나타내었다.Except for the manufacture and blow pattern of the solid product as shown in Table 3 below, the same method as in [Example 1] was used as a substitute for scrap in the converter, and then the Fe reduction rate to molten steel was measured, and the results are shown in Table 3 below. Indicated.
[표 3]TABLE 3
상기 표 3에 나타난 바와같이, 종례에는 고로슬러지 고형화품의 전체 Fe량이 낮고 전로사용기술의 미개발로 폐기처리되어 환경을 오염시키는 반면, 본 발명에 따른 고형화품을 제조후 전로에 스크랩으로 사용하여 발명예와 같이 취련을 실시하면 Fe환원율이 90%이상이 가능함을 알 수 있다.As shown in Table 3, in the case, the total Fe content of the blast furnace sludge solidified product is low and disposed of by the undeveloped converter use technology to contaminate the environment, while the solidified product according to the present invention is used as a scrap in the converter after manufacture. It can be seen that the Fe reduction rate of 90% or more is possible if the blowing is carried out as follows.
반면에 본 발명의 조건범위를 벗어나는 비교예의 경우에는 전로내의 용선장입시 수분에 의한 폭발발생이나 부적정한 취련 패턴으로 Fe환원율이 낮아 바람직하지 못함을 알 수 있다.On the other hand, in the case of the comparative example outside the condition range of the present invention, it can be seen that the Fe reduction rate is not preferable due to the occurrence of explosion due to moisture or inadequate blowing pattern when the molten iron is charged in the converter.
일반적으로 전로에 스크랩대용으로 사용하기 위해서는 Fe환원율은 70% 이상을 요구하고 있는 점을 고려할 때, 본 발명에 의한 고로슬러지 고형화품 제조 및 전로에 사용시 고로슬러지중의 Fe성분을 충분히 환원 시킴으로서 전로에 스크랩으로 재활용이 가능함을 알 수 있다.In general, considering that the Fe reduction rate is required to be 70% or more in order to replace the scrap in the converter, the Fe component in the blast furnace sludge is sufficiently reduced when the blast furnace sludge solidified product according to the present invention is used and used in the converter. It can be seen that the scrap can be recycled.
본 발명은 고로 슬러지를 처리함에 있어 다른 함철 폐기물과 시멘트를 첨가하여 고형화품으로 제조한 후 이를 제강공정인 전로에 스크랩 대용으로 사용함으로써 고로 슬러지중에 있는 함철성분들을 환원시켜 용강으로 만들어 환경 오염 방지 및 재활용에 의한 부가가치를 창출할 수 있는 효과를 제공한다.In the present invention, in the treatment of blast furnace sludge, another iron-containing waste and cement are added to produce a solidified product, and then used as a substitute for scrap in the converter, which is a steelmaking process, to reduce the iron-containing components in the blast furnace sludge to make molten steel to prevent environmental pollution It provides the effect of creating added value by recycling.
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| KR1019960026589A KR100289194B1 (en) | 1996-06-29 | 1996-06-29 | Method for recycling furnace sludge with a converter scrap |
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| KR1019960026589A KR100289194B1 (en) | 1996-06-29 | 1996-06-29 | Method for recycling furnace sludge with a converter scrap |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020074035A (en) * | 2001-03-16 | 2002-09-28 | 반봉찬 | Manufacture of heat reserving materials using millscale and sewage sludges from steel-making plant. |
| KR100435055B1 (en) * | 2001-07-30 | 2004-06-07 | 송충옥 | Blast furnace dust catcher dust solidifying method |
| KR20190078071A (en) | 2017-12-26 | 2019-07-04 | (주)신진기업 | reducing agent of electric furnace reduction and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5209196B2 (en) | 2005-11-07 | 2013-06-12 | 三星電子株式会社 | Manufacturing method of semiconductor device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020074035A (en) * | 2001-03-16 | 2002-09-28 | 반봉찬 | Manufacture of heat reserving materials using millscale and sewage sludges from steel-making plant. |
| KR100435055B1 (en) * | 2001-07-30 | 2004-06-07 | 송충옥 | Blast furnace dust catcher dust solidifying method |
| KR20190078071A (en) | 2017-12-26 | 2019-07-04 | (주)신진기업 | reducing agent of electric furnace reduction and manufacturing method thereof |
| KR102145007B1 (en) | 2017-12-26 | 2020-08-14 | 연연옥 | reducing agent of electric furnace reduction and manufacturing method thereof |
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