JP2007509239A - Recovery of valuable metals and non-metals from slag - Google Patents
Recovery of valuable metals and non-metals from slag Download PDFInfo
- Publication number
- JP2007509239A JP2007509239A JP2006536262A JP2006536262A JP2007509239A JP 2007509239 A JP2007509239 A JP 2007509239A JP 2006536262 A JP2006536262 A JP 2006536262A JP 2006536262 A JP2006536262 A JP 2006536262A JP 2007509239 A JP2007509239 A JP 2007509239A
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- JP
- Japan
- Prior art keywords
- slag
- added
- metal
- recovering
- valuables
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
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- 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
Abstract
予め定められた速度で鋼スラグに薬剤の混合物を添加し、次にそれから金属有価物を回収することを含む、スラグから金属及び非金属有価物を回収する方法。 A method of recovering metallic and non-metallic valuables from slag comprising adding a mixture of chemicals to steel slag at a predetermined rate and then recovering metallic valuables therefrom.
Description
本発明は、スラグから金属及び非金属有価物(value)を回収することに関する。 The present invention relates to the recovery of metal and non-metal values from slag.
本発明は、更に適当な添加剤を添加することにより、鋼製造中に発生したスラグから金属及び非金属有価物を回収することに関する。 The present invention further relates to the recovery of metal and non-metallic valuables from slag generated during steel production by adding suitable additives.
鋼製造中、スラグの形で廃棄物が発生し、そのトン数は、鋼の製造方法によって変化するが、典型的には、製造される鋼の10〜20%である。このスラグは、埋め立て廃棄物、道路製造材料、バラスト等のような、一般に低価格の用途に、直接又はある処理を行なった後、使用される。鋼スラグはかなりの量のCaO及び鉄の酸化物を含有するので、そのような低価格の用途は、その潜在的利用性に妥当なものではない。 During steel production, waste is generated in the form of slag, the tonnage of which varies depending on the steel production method, but is typically 10-20% of the steel produced. This slag is used directly or after some processing for generally low cost applications such as landfill waste, road construction materials, ballasts and the like. Since steel slag contains significant amounts of CaO and iron oxides, such low cost applications are not reasonable for its potential availability.
採用される高温金属の種類及び/又は実際の鋼製造方法により、次の化合物は、再利用できるBOFスラグの量を制約する:大きな割合の鉄酸化物(一種又は多種)、及び中程度から大きな割合の燐の酸化物、及び無駄な時間の存在。同時に、スラグのほぼ半分はCaOから構成され、ほぼ1/5は鉄酸化物(一種又は多種)から構成されていると言う事実は、これまで行われているよりももっと有益に利用することができるであろうことを示唆している。 Depending on the type of high-temperature metal employed and / or the actual steel production method, the following compounds limit the amount of BOF slag that can be reused: a large proportion of iron oxide (one or many), and moderate to large The proportion of phosphorus oxide, and the presence of wasted time. At the same time, the fact that nearly half of the slag is composed of CaO and almost 1/5 is composed of iron oxide (one or many) can be used more beneficially than has been done so far. It suggests that it will be possible.
本発明の一つの目的は、スラグを潜在的に有用にするように、スラグから金属及び非金属有価物を回収する方法を提供することにある。 One object of the present invention is to provide a method for recovering metallic and non-metallic valuables from slag so that it is potentially useful.
本発明の更に別の目的は、スラグから金属及び非金属有価物を回収して、一層多量のBOFスラグを再利用できるようにする、方法を提供することにある。 Yet another object of the present invention is to provide a method for recovering metallic and non-metallic valuables from slag so that a greater amount of BOF slag can be reused.
本発明のこれら及び他の目的は、確実にする記述から一層明らかになるであろう。 These and other objects of the present invention will become more apparent from the assured description.
本発明により、スラグから金属及び非金属有価物を回収する方法が与えられる。 The present invention provides a method for recovering metal and non-metal valuables from slag.
本発明に従い、その方法は、選択された薬剤を予め定められた速度で鋼スラグに添加することを含む。用いられる薬剤は、フェロシリコン、炭素、結晶性鉱物(spar)、アルミニウム、石灰の混合物であって、目的とする最終用途により全薬剤の100%〜0%でそれぞれ変化する割合での混合物である。添加は、溶融状態で行われるのが好ましいが、必ずしもそうである必要はない。 In accordance with the present invention, the method includes adding a selected agent to the steel slag at a predetermined rate. The drug used is a mixture of ferrosilicon, carbon, crystalline mineral (spar), aluminum, lime, with a ratio varying from 100% to 0% of the total drug depending on the intended end use. . The addition is preferably performed in the molten state, but this need not necessarily be the case.
鋼を鋼ラドル(steel ladle)中へ流出させた後、スラグを鋼製造容器から、適当に裏打されたスラグポットへ取り出す。操作プラントで通常行われているやり方でそのポットを取扱うが、ポットの口を耐火物裏打蓋で覆った後、処理スタンド上に置く。種々の薬剤を注入することができる、適当な耐火性材料で作られたランスを、スラグポットの中に降下させ、処理を開始する。希望の速度で必要な量の薬剤を注入した後、その処理を停止し、スラグを粒状にするか又は一度にあける。薬剤が鉄酸化物を還元した後に形成された溶融鉄のプールを、金属有価物として回収する。処理されたスラグは、鉄鉱石焼結製造、脱硫用化合物、鋼処理中の石灰の部分的代替物等を含めた種々の最終用途に適している。 After the steel has flowed into the steel ladle, the slag is removed from the steel production vessel into a suitably lined slag pot. The pot is handled in the usual manner in an operating plant, but the pot mouth is covered with a refractory back cover and placed on a processing stand. A lance made of a suitable refractory material that can be infused with various drugs is lowered into the slag pot and processing begins. After injecting the required amount of drug at the desired rate, the process is stopped and the slag is granulated or poured at once. The pool of molten iron formed after the agent has reduced the iron oxide is recovered as a valuable metal. The treated slag is suitable for a variety of end uses including iron ore sinter production, desulfurization compounds, partial substitutes for lime during steel processing, and the like.
作動プラントでのパイロット規模の実験を行い、鉄及び燐の酸化物を減少させるのに必要な処理パラメーターを確立した。処理したスラグの即時のフレーク形成をもたらすその方法の種々の状態を判定した。用いられる薬剤の正確な量及び種類は、目的とする最終用途に依存する。フェロシリコンは、スラグに対し0〜150kg/tの割合で用いられ、アルミニウムはスラグに対し0〜90kg/tの割合で用いられ、コークス、結晶性鉱物、及び石灰は、それぞれスラグに対し0〜100、0〜50、及び0〜60kg/tの割合で用いられる。パージングガスを、0〜600リットル/分で用いる。 Pilot-scale experiments at the operating plant were conducted to establish the processing parameters required to reduce iron and phosphorus oxides. Various states of the method that resulted in immediate flake formation of the treated slag were determined. The exact amount and type of drug used will depend on the intended end use. Ferrosilicon is used at a rate of 0 to 150 kg / t with respect to slag, aluminum is used at a rate of 0 to 90 kg / t with respect to slag, and coke, crystalline mineral, and lime are each 0 to 0 with respect to slag. Used at a rate of 100, 0-50, and 0-60 kg / t. Purging gas is used at 0-600 liters / minute.
この方法を用いることにより、スラグ中の鉄及び燐の酸化物は、それらの最初のレベルから夫々1%未満へ低下させることができる。典型的な結果を、図面の図1に示すが、それはBOFスラグの減少を示している。グラフは、時間による、添加薬剤の割合(%)対Fe及びP2O5の割合(%)を描いたものである。 By using this method, the iron and phosphorus oxides in the slag can be reduced from their initial level to less than 1% each. A typical result is shown in FIG. 1 of the drawings, which shows a reduction in BOF slag. The graph depicts the percentage of added drug versus percentage of Fe and P 2 O 5 over time.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN550KO2003 | 2003-10-24 | ||
PCT/IN2004/000333 WO2005040432A1 (en) | 2003-10-24 | 2004-10-25 | The recovery of metallic and non-metallic values from slag |
Publications (1)
Publication Number | Publication Date |
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JP2007509239A true JP2007509239A (en) | 2007-04-12 |
Family
ID=34509345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006536262A Pending JP2007509239A (en) | 2003-10-24 | 2004-10-25 | Recovery of valuable metals and non-metals from slag |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1682684A1 (en) |
JP (1) | JP2007509239A (en) |
KR (1) | KR20070004538A (en) |
CN (1) | CN1898399A (en) |
WO (1) | WO2005040432A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51121030A (en) * | 1975-04-16 | 1976-10-22 | Nippon Kokan Kk | Treatment process for melted slag in steel production |
JPH11246918A (en) * | 1998-03-03 | 1999-09-14 | Univ Tokyo | Treatment of steelmaking slag with microwave heating |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5324001B2 (en) * | 1973-10-02 | 1978-07-18 | ||
ZA743607B (en) * | 1974-06-20 | 1975-09-24 | Anglo Amer Corp South Africa | Pyrometallurgical processes |
-
2004
- 2004-10-25 WO PCT/IN2004/000333 patent/WO2005040432A1/en active Application Filing
- 2004-10-25 CN CNA2004800345834A patent/CN1898399A/en active Pending
- 2004-10-25 EP EP20040806739 patent/EP1682684A1/en not_active Ceased
- 2004-10-25 KR KR1020067009905A patent/KR20070004538A/en not_active Application Discontinuation
- 2004-10-25 JP JP2006536262A patent/JP2007509239A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51121030A (en) * | 1975-04-16 | 1976-10-22 | Nippon Kokan Kk | Treatment process for melted slag in steel production |
JPH11246918A (en) * | 1998-03-03 | 1999-09-14 | Univ Tokyo | Treatment of steelmaking slag with microwave heating |
Also Published As
Publication number | Publication date |
---|---|
WO2005040432A1 (en) | 2005-05-06 |
KR20070004538A (en) | 2007-01-09 |
EP1682684A1 (en) | 2006-07-26 |
CN1898399A (en) | 2007-01-17 |
WO2005040432B1 (en) | 2005-07-07 |
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