KR20000040935A - Method for producing substitute of scrap for steel manufacture using hot rolled oil sludge - Google Patents

Method for producing substitute of scrap for steel manufacture using hot rolled oil sludge Download PDF

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KR20000040935A
KR20000040935A KR1019980056689A KR19980056689A KR20000040935A KR 20000040935 A KR20000040935 A KR 20000040935A KR 1019980056689 A KR1019980056689 A KR 1019980056689A KR 19980056689 A KR19980056689 A KR 19980056689A KR 20000040935 A KR20000040935 A KR 20000040935A
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South Korea
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hot rolled
oil sludge
rolled oil
bentonite
scrap
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KR1019980056689A
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Korean (ko)
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이현
이규형
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이구택
포항종합제철 주식회사
신현준
재단법인 포항산업과학연구원
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Priority to KR1019980056689A priority Critical patent/KR20000040935A/en
Publication of KR20000040935A publication Critical patent/KR20000040935A/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE: A method is provided to produce a substitute of scrap available to be directly applied to iron resource in steel manufacture process by removing grease of hot rolled oil sludge via thermal treatment and by forming by using bentonite or Portland cement. CONSTITUTION: Armally treated hot rolled oil sludge 85-96wt%, bentonite 1-5wt% and Portland cement 3-10wt% are mixed. The mixture is formed in a certain shape by adding moisture in a general method. The shaped mixture is grown and dried. Thereby, a substitute of scrap for steel manufacture using hot rolled oil sludge is produced.

Description

열연오일슬러지를 이용한 제강용 스크랩대용제 제조방법Manufacturing method of scrap substitute for steelmaking using hot rolled oil sludge

본 발명은 열연공장에서 발생된 오일함유 열연오일 슬러지를 제강용 스크랩대신 철원으로서 활용이 가능하도록 함유 유분을 열분해 처리한 후, 벤토나이트와 포틀란트시멘트를 사용하여 스크랩대용제로 제조하는 방법에 관한 것이다.The present invention relates to a method for producing a scrap substitute using bentonite and portland cement after pyrolysis treatment of oil-containing hot rolled oil sludge generated in a hot rolling mill to be utilized as an iron source instead of steelmaking scrap. .

열간압연공장에서 발생되는 열연오일 슬러지는 여러 가지 측면에서 환경에 악영향을 미치고 있다. 오일함유 슬러지는 전처리를 통하여 재활용을 하거나 매립을 하여 환경적으로 안정된 상태로 처리하기 때문에 환경비용이 많이 소요되고 있는 실정이다.Hot rolled oil sludge produced in hot rolling mills has an adverse effect on the environment in many ways. Oil-containing sludge is environmentally stable because it is recycled through landfill or landfilled and treated in an environmentally stable state.

오일슬러지를 처리하는 관련기술로는 물리적으로 유분을 회수하는 기술이 다양하게 개발되고 있으며 증류탑등 화성설비에서 유분을 회수하는 시스템기술로는 미국특허US 4994169호가 알려져 있다. 또한, 화학적 처리방법으로 비이온성 계면활성제를 이용하여 액포를 형성하여 슬러지와 오일간의 분리처리하는 기술로 미국특허 US 4536324호가 알려져 있다.As a related technology for treating oil sludge, various techniques for recovering oil are developed, and US Patent US 4994169 is known as a system technology for recovering oil from a chemical plant such as a distillation column. In addition, US Pat. No. 45,36,324 is known as a technique for forming a vacuole using a nonionic surfactant as a chemical treatment to separate the sludge and oil.

하지만, 상기 방법들은 복잡한 단계를 거쳐 행해지고, 최종적으로 얻어지는 것을 매립에 의해 처리해 버리는 문제가 있었다.However, the above methods are carried out through complicated steps, and there is a problem in that what is finally obtained is processed by landfilling.

이에 본 발명자들은 보다 효율적으로 열연오일 슬러지를 처리하고자 연구와 실험을 거듭하고 그 결과에 근거하여 본 발명을 제안하게 된 것으로, 본 발명은 열연오일슬러지를 열처리를 통하여 유분을 제거하고 벤토나이트 및 포틀란트시멘트를 이용하여 성형함으로서, 제강공정에 직접 철원으로 활용가능한 스크랩 대용제를 제조하는 방법을 제공하는데, 그 목적이 있다.Accordingly, the present inventors have repeatedly conducted research and experiment to treat hot rolled oil sludge more efficiently, and proposed the present invention based on the results. The present invention removes oil through heat treatment of hot rolled oil sludge and removes bentonite and portlan. The present invention provides a method for producing a scrap substitute which can be used as an iron source directly in a steelmaking process by molding using a cement.

도 1은 본 발명의 제조공정을 개략적으로 보이는 순서도1 is a flow chart schematically showing the manufacturing process of the present invention

도 2는 열처리시간에 따른 오일 슬러지의 탄소함량(%)를 나타낸 그래프2 is a graph showing the carbon content (%) of oil sludge according to the heat treatment time

도 3은 표 2의 배합에 따른 압축강도를 나타낸 그래프3 is a graph showing the compressive strength according to the formulation of Table 2

도 4는 표 2의 배합에 따른 용융시험 후 슬래그량 증가분(%)를 나타낸 그래프Figure 4 is a graph showing the increase in slag amount (%) after the melting test according to the formulation of Table 2

도 5는 포틀란트시멘트 첨가량에 따른 압축강도 변화를 나타낸 그래프5 is a graph showing the change in compressive strength according to the amount of portant cement added

상기 목적을 달성하기 위한 본 발명은 유분이 포함된 열연오일 슬러지를 건조하고 500℃이상에서 열처리하는 단계; 열처리된 열연오일슬러지 85-96중량%, 벤토나이트 1-5중량%, 포틀란트시멘트 3-10중량%로 배합하여 혼합하는 단계; 및 통상의 방법으로 수분을 첨가하고 형상을 제조한 후 양생 및 건조하는 단계;를 포함하는 열연오일 슬러지를 이용한 제강용 스크랩 대용제 제조방법에 관한 것이다.The present invention for achieving the above object is the step of drying the hot rolled oil sludge containing oil and heat-treated at 500 ℃ or more; Mixing and mixing 85-96% by weight of the heat-treated hot sludge oil, 1-5% by weight of bentonite, and 3-10% by weight of the portant cement; It relates to a method for producing a scrap substitute for steelmaking using hot rolled oil sludge; and the step of curing and drying after adding moisture in the usual manner to prepare a shape.

이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.

본 발명에서는 유분이 포함된 열연오일 슬러지를 건조하고 500℃이상에서 열처리한다.In the present invention, the hot rolled oil sludge containing oil is dried and heat treated at 500 ° C. or higher.

상기 열처리는 500℃미만에서도 가능하지만 열처리시간이 장시간 소요되는 문제가가 있어, 500℃이상에서 행하는 것이 바람직하다. 즉, 실공정에 활용시 로타리킬른을 통과하는데 20분 이내로 처리하는 것이 바람직하며, 이정도의 시간내에 열처리를 행할 수 있는 것이 500℃이상이다.The heat treatment can be performed at less than 500 ° C., but there is a problem that the heat treatment time is required for a long time. That is, when used in the actual process, it is preferable to process within 20 minutes to pass through the rotary kiln, and it is more than 500 ° C that the heat treatment can be performed within this time.

또한, 본 발명에서는 열처리된 열연오일슬러지 85-96중량%, 벤토나이트 1-5중량%, 포틀란트시멘트 3-10중량%로 배합하여 혼합한다.In addition, in the present invention, 85 to 96% by weight of heat-treated hot sludge, 1-5% by weight of bentonite, and 3-10% by weight of portant cement are mixed and mixed.

상기 열연오일슬러지, 벤토나이트 및 포틀란트시멘트를 본 발명에 적용하기 위해서는 하기 표1과 같은 화학적 조성을 갖는 것이 바람직하다. 다만, 이는 바람직한 예일 뿐이며 본 발명이 여기에 한정되는 것은 아니다.In order to apply the hot rolled oil sludge, bentonite and portland cement to the present invention, it is preferable to have a chemical composition as shown in Table 1 below. However, this is only a preferred example and the present invention is not limited thereto.

성분ingredient SiO2 SiO 2 Al2O3 Al 2 O 3 Fe2O3 Fe 2 O 3 T-FeT-Fe MnOMnO MgOMgO CaOCaO Na2O+K2ONa 2 O + K 2 O CC SS 열연오일슬러지(중량%)Hot Rolled Oil Sludge (wt%) 0.15-3.50.15-3.5 0.10-0.50.10-0.5 -- 63-7063-70 0.15-0.320.15-0.32 0.01-0.050.01-0.05 0.01-0.30.01-0.3 0.01-0.10.01-0.1 1.5-12.21.5-12.2 0.03-0.30.03-0.3 벤토나이트(중량%)Bentonite (% by weight) 67.3-69.967.3-69.9 11.9-15.211.9-15.2 0.92-2.010.92-2.01 -- -- 0.6-1.180.6-1.18 1.21-2.961.21-2.96 5.31-13.25.31-13.2 -- -- 포틀란트시멘트(중량%)Portland Cement (% by weight) 17-2517-25 3-83-8 0.5-6.00.5-6.0 -- -- 0.1-5.50.1-5.5 60-6760-67 0.5-1.30.5-1.3 -- 1-31-3

상기 벤토나이트는 화학성분중 알카리 성분(Na2O+K2O)이 다른 성분과 반응하여 융점을 저하시켜서 열연오일슬러지 중에 포함된 산화철 성분을 환원하여 제강중 철원으로 용해되는데 조제 역할을 한다. 그러나, 첨가량이 증가되면 다른 성분의 증가로 슬래그량을 증대시키는 악영향을 나타내므로 적정량을 사용하는 것이 필요하다. 또한 벤토나이트는 분말도가 크고 물흡수성이 강하여 형상제조시에도 강도를 증대시키는 효과를 동반한다. 상기 열연오일슬러지에 첨가되는 벤토나이트의 첨가량이 5%를 넘게 되면 상기에서 지적한 문제점이 있으며, 너무 적은 양인 1%미만으로 투입될 경우에는 효과를 발휘하지 못하기 때문에 본 발명에서는 벤토나이트를 1-5% 를 첨가하는 것이 바람직하다.The bentonite acts as an alkali component (Na 2 O + K 2 O) in the chemical component to reduce the melting point by reacting with other components to reduce the iron oxide component contained in the hot rolled oil sludge to dissolve as iron source during steelmaking. However, it is necessary to use an appropriate amount because an increase in the amount of addition shows an adverse effect of increasing the amount of slag due to the increase of other components. In addition, bentonite has a high powder density and strong water absorption, which is accompanied by an effect of increasing strength even when manufacturing the shape. If the amount of bentonite added to the hot rolled oil sludge exceeds 5%, there is a problem pointed out above, and in the present invention, the bentonite is 1-5% because it is not effective when the amount is less than 1%. Preference is given to adding.

상기 포틀란트 시멘트는 형상제조시의 강도를 내기 위해서 사용하는데, 그 효과를 얻기 위해서는 3%이상 첨가하며, 10%를 초과하면 강도는 증가하지만 제강공정에 사용되는 적정강도 이상으로 제조할 필요는 없으며 또한 적정강도 25-50kgf/cm2이면 충분하기 때문에 과량을 사용하여 강도를 증대할 필요는 없기 때문에, 본 발명에서는 3-10%의 포틀란트 시멘트를 사용하는 것이 바람직하다.The Portland cement is used to produce the strength of the shape manufacturing, to achieve the effect is added 3% or more, if it exceeds 10% the strength is increased, but it is not necessary to manufacture more than the appropriate strength used in the steelmaking process In addition, since it is not necessary to increase the strength by using an excessive amount because 25-50 kgf / cm 2 of proper strength is sufficient, it is preferable to use 3-10% of Portland cement in the present invention.

상기 열연오일슬러지는 제강용 철원으로 사용되며, 벤토나이트 함량과 포틀란트 시멘트 함량 측면에서 보면, 본 발명에서는 열처리된 열연오일슬러지를 85-96% 사용하게 된다.The hot rolled oil sludge is used as an iron source for steelmaking, and in terms of bentonite content and portland cement content, the present invention uses 85-96% of the heat-treated hot rolled oil sludge.

또한, 본 발명에서는 통상의 방법으로 수분을 첨가하고 형상을 제조한 후 양생 및 건조한다.In addition, in the present invention, water is added in a conventional manner to prepare a shape, and then curing and drying.

상기 배합비로 조성된 제강용 스크랩 대용제의 형상제조를 위하여 통상의 제조공정을 거치게 된다. 즉, 상기 조성의 열처리된 열연오일슬러지, 벤토나이트와 포틀란트시멘트를 혼합하여 수분을 첨가하여 가압성형을 하거나 펠렛제조기에서 수분을 첨가하면 펠렛을 제조하는 방법으로 형상을 제조하고, 양생 및 건조를 통하여 스크랩대용제를 제조하는 것이다.In order to manufacture the shape of the steel scrap scrap substitute prepared in the compounding ratio is subjected to a conventional manufacturing process. That is, the heat-treated hot rolled oil sludge, bentonite and portland cement of the composition are mixed and pressurized by adding moisture, or when water is added in a pellet maker, a shape is prepared by a method of preparing pellets, and curing and drying are performed. It is to prepare a scrap substitute.

상기한 바와같은 본 발명의 제조공정을 개략적으로 도 1에 나타내었다.The manufacturing process of the present invention as described above is schematically shown in FIG.

이하, 실시예를 통하여 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

실시예 1Example 1

본 실시예에서는 열연오일슬러지에 포함된 오일성분을 분해하기 위하여 열처리조건시험을 실시하였다. 온도조건은 300℃에서 700℃까지 100℃ 간격으로 열처리하였다. 각각의 온도에서 5분 간격으로 시료를 채취하여 슬러지중에 포함된 유분의 탄소성분을 분석하여 그 결과를 도 2에 나타냈다.In this embodiment, a heat treatment condition test was conducted to decompose the oil component contained in the hot rolled oil sludge. Temperature conditions were heat-treated at intervals of 100 ° C. from 300 ° C. to 700 ° C. Samples were taken at each temperature at 5 minute intervals, and the carbon components of the oil contained in the sludge were analyzed and the results are shown in FIG. 2.

도 2에 있어서 열처리시간과 열처리된 열연오일슬러지중의 탄소함량을 분석하여 나타난 결과에 의하면, 열처리온도가 400℃에서는 30분, 500℃에서는 20분, 600℃에서는 15분이 소요된 후 유분이 온전히 처리되는 것으로 나타나고 있다. 열처리시간은 공정의 소요시간과 관련되어 있으며 400℃ 에서도 열처리는 충분히 일어나지만 소요시간이 장시간 소요되므로 공정에 활용시에 로타리킬른을 통과하는데 20분 이내로 처리하는 것이 바람직하다. 따라서, 본 발명에서는 열연오일슬러지를 열처리시에 500℃ 이상의 온도조건으로 하는 것이 바람직함을 알 수 있다.According to the results of analyzing the heat treatment time and the carbon content of the heat-treated hot sludge sludge in Fig. 2, after the heat treatment temperature is 30 minutes at 400 ℃, 20 minutes at 500 ℃, 15 minutes at 600 ℃ after the oil is intact It is shown to be processed. The heat treatment time is related to the time required for the process, and heat treatment takes place even at 400 ° C, but it takes a long time, so it is desirable to treat it within 20 minutes to pass through the rotary kiln when used in the process. Therefore, it can be seen that in the present invention, the hot rolled oil sludge is preferably set at a temperature of 500 ° C. or higher at the time of heat treatment.

실시예 2Example 2

본 실시예에서는 원료의 배합조건중 벤토나이트의 적정함량을 시험한 것으로, 포틀란트시멘트를 5중량%로 유지하여, 하기표 2와 같은 비율로 원료를 배합하고, 도 1과 같은 제조공정으로 제조하였다.In this embodiment, the proper content of bentonite was tested in the mixing conditions of the raw materials, the portant cement was maintained at 5% by weight, the raw materials were blended in the ratio as shown in Table 2 below, and manufactured by the manufacturing process as shown in FIG. 1. It was.

구 분division 비교예 1Comparative Example 1 발명예 1Inventive Example 1 발명예 2Inventive Example 2 발명예 3Inventive Example 3 비교예 2Comparative Example 2 열처리된 열연오일슬러지(중량%)Heat Treated Hot Rolled Oil Sludge (wt%) 9595 9494 9292 9090 8888 포틀란트시멘트(중량%)Portland Cement (% by weight) 55 55 55 55 55 벤토나이트(중량%)Bentonite (% by weight) 00 1One 33 55 77

상기와 같이 제조된 펠렛의 압축강도를 측정하여 그 결과를 도 3에 나타내었으며, 이를 이용하여 실제 제강공정에서 사용가능한 정도의 강도가 유지되는지를 확인하고자 하였다.The compressive strength of the pellets prepared as described above was measured, and the results are shown in FIG. 3, and the results were used to determine whether the strength of the pellets maintained in the actual steelmaking process was maintained.

또한, 상기와 같이 제조된 펠렛의 용융시험을 행하였다. 상기 용융시험은 시험용 고주파 유도 용해로에서 냉선을 5kg 투입하고 1500℃로 유지한 후 상기표 2와 같이 배합하여 제조된 펠렛을 500g 투입하고 혼련한 후 5분이 경과되어 슬래그층을 제거하여 냉각한 후 슬래그량을 벤토나이트를 첨가하지 않는 비교예 1을 기준으로 슬래그량 증가분을 백분율로 환산하여 도 4에 나타내었다.Further, a melt test of the pellets prepared as described above was performed. In the melting test, 5 kg of cold wire was added in a high frequency induction melting furnace for testing, and maintained at 1500 ° C., 500 g of pellets prepared by mixing as shown in Table 2 were added and kneaded, and after 5 minutes, the slag layer was removed and cooled, followed by slag. Based on Comparative Example 1 in which the amount of bentonite is not added, the amount of slag increase is shown in FIG. 4 in terms of percentage.

도 3에 있어서 제강공정에 활용하기 위한 적정강도로 25kgf/cm2이상이 유지되는 조건은 발명예 1-3과 비교예 2에서는 충분한 강도를 유지하고 있음을 보였다. 여기서, 벤토나이트가 1중량% 이상 첨가되면 열처리된 오일슬러지량이 상대적으로 감소하고 포틀란트시멘트와 같이 작용하여 양생시에 강도의 증가에 큰 역할을 함을 알 수 있다. 도 3의 결과에서 벤토나이트 첨가시에 1중량% 이상 첨가하는 것이 바람직하다고 볼 수 있었다.In FIG. 3, the conditions under which 25 kgf / cm 2 or more is maintained at an appropriate strength for use in the steelmaking process showed that the sufficient strengths were maintained in the inventive examples 1-3 and the comparative example 2. Here, it can be seen that when bentonite is added in an amount of 1% by weight or more, the amount of heat treated oil sludge is relatively decreased and acts like a portant cement, which plays a large role in increasing strength during curing. In the results of Figure 3 it can be seen that it is preferred to add more than 1% by weight at the time of bentonite addition.

도 4에 있어서 유도용해로에 시험한 결과로 비교예 1에 대비하여 슬래그량 증가분을 백분율로 나타낸 것인데 슬래그 증가분이 10% 미만으로 유지되어야 제강공정에서 부담없이 처리가 가능하다. 벤토나이트가 7중량% 이상들어가면 벤토나이트내의 산화규소, 산화칼슘, 산화알루미늄이 슬래그로 되어 양이 증가하기 때문에 벤토나이트를 5중량% 이하로 하는 것이 바람직하게 된다.As shown in FIG. 4, the result of the test in the induction furnace shows the increase in the amount of slag as a percentage compared to Comparative Example 1, and the increase in slag should be maintained at less than 10% so that the steelmaking process can be easily processed. When bentonite is contained in an amount of 7% by weight or more, the amount of silicon oxide, calcium oxide, and aluminum oxide in bentonite becomes slag, so that the amount is increased, so that bentonite is preferably 5% by weight or less.

따라서 본 실시예의 결과로 성형체 제조시의 배합으로 벤토나이트는 1-5중량% 로 하는 것이 바람직하다고 할 수 있다.Therefore, as a result of the present Example, it can be said that bentonite is preferably 1 to 5% by weight in blending during manufacture of the molded product.

실시예 3Example 3

본 실시예에서는 벤토나이트 3중량%와 포틀란트 시멘트를 각각 1, 3, 5, 7, 10, 13 중량%를 투입하고, 그 나머지를 열처리된 열연오일슬러지로 배합하여 총배합 중량에 대하여 수분을 7%첨가하고 성형몰드에서 100kgf/cm2로 가압하여 제조된 성형체를 24시간 양생후 건조하고, 압축강도를 측정하여 도 5에 나타냈다.In this embodiment, 3% by weight of bentonite and 1, 3, 5, 7, 10, and 13% by weight of portland cement are added, and the remainder is blended with heat-treated hot rolled oil sludge to provide moisture to the total blend weight. The molded article prepared by adding 7% and pressurized to 100kgf / cm 2 in the molding mold was cured for 24 hours and dried, and the compressive strength was measured and shown in FIG. 5.

도 5에 있어서 포틀란트 시멘트의 첨가량에 따라서 압축강도가 차이가 많이 나는데 1중량% 에서는 적정강도에도 못미치는 결과를 나타냈으며 13중량% 에서는 70kgf/cm2로 너무 과대 강도를 나타냈다. 적정강도 25-50kgf/cm2을 유지하는 것이 바람직하고 포틀란트 시멘트를 과량 사용하여 강도를 증가시킬 필요는 없다. 따라서 본 발명에서는 포틀란트시멘트의 첨가량을 3-10% 를 배합하는 것이 바람직하다.In FIG. 5, the compressive strength varies greatly depending on the amount of Portland cement added. However, the weight strength of 1% by weight did not reach the appropriate strength, and the weight was too high as 70kgf / cm 2 at 13% by weight. It is desirable to maintain an appropriate strength of 25-50 kgf / cm 2 and it is not necessary to increase the strength by using an excessive amount of Portland cement. Therefore, in this invention, it is preferable to mix | blend 3-10% of addition amount of a portant cement.

상술한 바와같은 본 발명을 통하여 제조된 스크랩 대용제는 열연오일 슬러지를 이용하므로서, 환경친화적인 제철소내 폐기물의 재활용 차원에서도 바람직하며 기존의 방식으로 사용되는 대용제에 비하여 제강의 효율이 높다. 또한, 본 발명에 의한 스트랩 대용제는 제강에 활용되어 철원으로서 제강의 생산량 증대에도 크게 기여하여 경제적으로 부가가치의 증대에 큰 효과가 있다.The scrap substitute manufactured through the present invention as described above uses hot rolled oil sludge, which is also preferable in terms of recycling wastes in an environmentally friendly steel mill, and has higher efficiency in steelmaking than the substitute used in the conventional manner. In addition, the strap substitute according to the present invention is utilized in steelmaking and contributes greatly to the increase in the production of steelmaking as an iron source, it is economically effective in increasing the added value.

Claims (1)

유분이 포함된 열연오일 슬러지를 건조하고 500℃이상에서 열처리하는 단계;Drying the hot rolled oil sludge containing oil and heat-treated at 500 ° C. or higher; 열처리된 열연오일슬러지 85-96중량%, 벤토나이트 1-5중량%, 포틀란트시멘트 3-10중량%로 배합하여 혼합하는 단계; 및Mixing and mixing 85-96% by weight of the heat-treated hot sludge oil, 1-5% by weight of bentonite, and 3-10% by weight of the portant cement; And 통상의 방법으로 수분을 첨가하고 형상을 제조한 후 양생 및 건조하는 단계;를 포함하는 열연오일 슬러지를 이용한 제강용 스크랩 대용제 제조방법Method for producing a scrap substitute for steelmaking using hot rolled oil sludge comprising the steps of adding moisture and preparing a shape and curing and drying in a conventional manner.
KR1019980056689A 1998-12-21 1998-12-21 Method for producing substitute of scrap for steel manufacture using hot rolled oil sludge KR20000040935A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100399234B1 (en) * 1999-12-21 2003-09-22 주식회사 포스코 Manufacturing of reduction iron in hot rolling mill oily sludge by addition of blast furnace slag
KR100402128B1 (en) * 1999-12-21 2003-10-17 주식회사 포스코 Manufacturing of reduction iron by hot rolling mill oily sludge
KR100415649B1 (en) * 1999-08-10 2004-01-31 주식회사 포스코 A Method for Manufacturing Scrap-Substitutions for Steel-Making Using Hot Rolled Mill Oily Sludge
KR101257054B1 (en) * 2011-06-28 2013-04-22 현대제철 주식회사 Method for manufacturing scrap of electric furnace using sludge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413409A (en) * 1977-07-02 1979-01-31 Nippon Steel Corp Method and equipment for producing steel-making pellets using sludge containing oil and iron
JPS56139633A (en) * 1981-03-23 1981-10-31 Nippon Steel Corp Manufacture of pellet for steel manufacture using sludge containing oil and iron
KR20000016307A (en) * 1996-05-31 2000-03-25 엘티브이 스틸 컴패니, 인코포레이티드 Method of agglomerating oil-containing steel mill waste

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413409A (en) * 1977-07-02 1979-01-31 Nippon Steel Corp Method and equipment for producing steel-making pellets using sludge containing oil and iron
JPS56139633A (en) * 1981-03-23 1981-10-31 Nippon Steel Corp Manufacture of pellet for steel manufacture using sludge containing oil and iron
KR20000016307A (en) * 1996-05-31 2000-03-25 엘티브이 스틸 컴패니, 인코포레이티드 Method of agglomerating oil-containing steel mill waste

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100415649B1 (en) * 1999-08-10 2004-01-31 주식회사 포스코 A Method for Manufacturing Scrap-Substitutions for Steel-Making Using Hot Rolled Mill Oily Sludge
KR100399234B1 (en) * 1999-12-21 2003-09-22 주식회사 포스코 Manufacturing of reduction iron in hot rolling mill oily sludge by addition of blast furnace slag
KR100402128B1 (en) * 1999-12-21 2003-10-17 주식회사 포스코 Manufacturing of reduction iron by hot rolling mill oily sludge
KR101257054B1 (en) * 2011-06-28 2013-04-22 현대제철 주식회사 Method for manufacturing scrap of electric furnace using sludge

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