JPS6028895B2 - How to treat electric furnace dust - Google Patents
How to treat electric furnace dustInfo
- Publication number
- JPS6028895B2 JPS6028895B2 JP56072531A JP7253181A JPS6028895B2 JP S6028895 B2 JPS6028895 B2 JP S6028895B2 JP 56072531 A JP56072531 A JP 56072531A JP 7253181 A JP7253181 A JP 7253181A JP S6028895 B2 JPS6028895 B2 JP S6028895B2
- Authority
- JP
- Japan
- Prior art keywords
- electric furnace
- slag
- furnace dust
- dust
- present
- Prior art date
- 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.)
- Expired
Links
- 239000000428 dust Substances 0.000 title claims description 33
- 239000002893 slag Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 17
- 230000005587 bubbling Effects 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- 239000010454 slate Substances 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 239000008188 pellet Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 238000009877 rendering Methods 0.000 claims description 2
- 241000718541 Tetragastris balsamifera Species 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 239000011133 lead Substances 0.000 description 11
- 238000010828 elution Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000011282 treatment Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】
本発明は、電気炉ダストの処理方法に関し、更に詳細に
は、電気炉製鋼に於て発生する有害重金属を含む電気炉
ダストを溶融状態にあるスラグの頭熱を利用して一部を
揮化回収し有用資源として再利用すると共に残留分をス
ラグ中に固定化処理する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating electric furnace dust, and more particularly, the present invention relates to a method for treating electric furnace dust, and more particularly, it utilizes the head heat of molten slag to treat electric furnace dust containing harmful heavy metals generated during electric furnace steelmaking. The present invention relates to a method in which a portion of the slag is recovered by volatilization and reused as a useful resource, and the remaining portion is fixed in slag.
電気炉ダストは鉄、亜鉛、鉛等の有用な金属酸化物を含
有する産業廃棄物であるが、その中に多量の亜鉛を含有
するために高炉原料へ再利用できず、かつ有害金属を含
有するために、これらの溶出抑制処理を行なって、法令
に適合しなければ埋立、投棄処分も行なうことはできな
い。Electric furnace dust is an industrial waste that contains useful metal oxides such as iron, zinc, and lead, but because it contains a large amount of zinc, it cannot be reused as a raw material for blast furnaces, and it also contains harmful metals. Therefore, unless these elution control treatments are carried out to comply with laws and regulations, the materials cannot be disposed of in landfills or dumped.
本発明者等は、かかる問題を解決すべく鋭意研究せる結
果、多量の亜鉛等の重金属を含む電気炉ダストを溶融状
態にあるスラグの顕熱を有効利用して一部を硬化回収し
再利用すると共に残留分をスラグ中に固定化処理を行な
う電気炉ダストの処理方法の発明を完成したものである
。As a result of intensive research to solve this problem, the present inventors effectively utilized the sensible heat of the molten slag to harden and reuse electric furnace dust containing a large amount of heavy metals such as zinc. At the same time, the present invention has completed the invention of a method for treating electric furnace dust, in which the residue is fixed in slag.
即ち、本発明の要旨は、溶融スラグに電気炉ダストベレ
ツト、高炉スラグ、赤泥、カラミ、マサ士及び粘板岩の
中の一種以上をバプリングガスと共に吹き込み輝化する
亜鉛、鉛を主体とする金属酸化物を回収すると共に、電
気炉ダスト中に含まれる有害物を無害化することを特徴
とする電気炉ダストの処理方法に存するものであり、以
下に本発明の方法について詳述する。That is, the gist of the present invention is to inject into molten slag one or more of electric furnace dust pellets, blast furnace slag, red mud, karami, masashi and slate together with a bubbling gas to brighten metal oxides mainly consisting of zinc and lead. The present invention is a method for treating electric furnace dust, which is characterized by recovering electric furnace dust and rendering harmful substances contained in the electric furnace dust harmless.The method of the present invention will be described in detail below.
本発明は、電気炉ダストを処理する方法として溶融スラ
グの有する顕熱を有効利用し、新たに加えることなく、
添加ダストを溶融反応させる方法として、のる鍋に受け
た溶融スラグに電気炉ダストベレット、高炉スラグ、赤
泥、カラミ、粘板岩及びマサ士の一種以上をバブリング
ガスと共に吹き込み、溶融スラグの対流又はバブリング
を行なわせ麓化亜鉛、鉛等を集塵機で回収し、粗亜鉛と
する。The present invention effectively utilizes the sensible heat of molten slag as a method for treating electric furnace dust, without adding any additional heat.
As a method of melting and reacting the added dust, one or more types of electric furnace dust pellets, blast furnace slag, red mud, karami, slate, and masashi are blown into the molten slag received in a ladle together with bubbling gas, and convection or bubbling of the molten slag is carried out. After this process, zinc, lead, etc., are collected using a dust collector and made into crude zinc.
反応が終了した溶融スラグは放流又はのる鍋内で硬化さ
せ、破砕、磁選後略盤材等に有効利用する。ただ、添加
する電気炉ダストに鉛の多い場合があり、該電気炉ダス
トのみを添加して処理するとスラグより鉛イオンを約０
．１脚血〜０．物 ｍ程度溶出することもある。After the reaction, the molten slag is discharged or hardened in a pot, and after being crushed and magnetically sorted, it is effectively used for plate materials, etc. However, there are cases where the electric furnace dust to be added contains a lot of lead, and if only the electric furnace dust is added to the treatment, lead ions are reduced to about 0% compared to slag.
．． One leg blood~0. In some cases, about 1.5 m of the substance may be eluted.
そこで赤泥、カラミ、マサ士、大占板岩、高炉スラグの
一種以上を添加し鉛イオンの港出を防止する。一方スラ
グ中にはＦ・Ｃａ○（遊離石灰）、ｙ−本ａ０１Ｓｉ０
２・Ｆ・Ｍｇ○（遊離マグネシウム）等を含有している
ので崩壊性を有する。Therefore, one or more of red mud, karami, masashi, large sheet rock, and blast furnace slag are added to prevent lead ions from leaving the port. On the other hand, the slag contains F・Ca○ (free lime), y-core a01Si0
It has disintegrability because it contains 2.F.Mg○ (free magnesium), etc.
この崩壊性を防止するためには電気炉ダストのみ添加す
る場合は多量に使用しなければならず、その結果スラグ
より鉛イオンの熔出の危険性があるため、赤泥、カラミ
、マサ士、粘板岩、高炉スラグ等を配合、組み合せて処
理するものである。なお本願方法に於いて顕熱源として
電気炉スラグを利用する場合には、発生するダストの量
に比して発生する溶融電気炉ダストの量が（顕熱を考慮
して）不足するのでダストの一部はリターンさせて再び
電気炉へ装入する方式を採るのが実操業上は効果的であ
る、転炉や高炉にあっては発生する溶融スラグ量が多大
であるのでこの様な配慮をする必要がないのはいうまで
もない。In order to prevent this disintegration, if only electric furnace dust is added, it must be used in large quantities, and as a result, there is a risk of lead ions being eluted from the slag. This process involves mixing and combining slate, blast furnace slag, etc. In addition, when electric furnace slag is used as a sensible heat source in the present method, the amount of molten electric furnace dust generated is insufficient compared to the amount of dust generated (taking sensible heat into consideration). In actual operation, it is effective to return some of the slag and charge it into the electric furnace again.In converter furnaces and blast furnaces, a large amount of molten slag is generated, so such considerations are necessary. Needless to say, there is no need to do so.
以下に本発明の実施例について説明する。Examples of the present invention will be described below.
まず第１表は、本発明に使用した使用原料の化学分析値
を示し、第２表は第１表の使用原料について環境庁告示
方法による溶出試験を行った結果を示すものである。First, Table 1 shows the chemical analysis values of the raw materials used in the present invention, and Table 2 shows the results of an elution test performed on the raw materials in Table 1 according to the method notified by the Environment Agency.
第１表
第２表
上記した原料を１０５℃〜１１０ｑ○の恒温乾燥機で２
４時間以上乾燥後、スラグ、赤泥、マサ士、粘板岩、カ
ラミ、高炉スラグはサンプルグラインダーで４側以下に
粗砕、スラグのみ磁透し、０．３柳以下に粉砕してゼー
ゲル錐を作り、溶倒温度を測定した。Table 1 Table 2 The above raw materials were dried in a constant temperature dryer at 105°C to 110q○.
After drying for more than 4 hours, the slag, red mud, masashi, slate, karami, and blast furnace slag are roughly crushed into 4 sides or less using a sample grinder. , the melting temperature was measured.
又、４肋以下のスラグの磁選尾鉱を電熱マグネシアルッ
ボに入れ、１５５０００に保持したシリコニツト電気炉
で再溶融させ、電気炉ダストベレット（約２側め〜３側
め）とし、このべレットと赤泥、マサ士、粘板岩、カラ
ミ、高炉スラグの４側以下の粗砕物の一種以上を窒素ガ
ス又は空気と一緒にランスパィプ状物（磁製管）を通し
て１分間で吹き込み（合計２００の、更に窒素ガス又は
空気をあと吹きとして１分間（約４．３ぞ／分）吹き込
んでバブリングを行ない１５２０００〜１５１０ｏｏで
１分間保持後、電源スイッチを切って約１２００ｑｏで
炉外に出し空冷した。In addition, the magnetic tailings of slag of 4 or less ribs are placed in an electric heating magnesia arubbo and remelted in a siliconite electric furnace maintained at 155,000 ℃ to form an electric furnace dust pellet (approximately 2nd to 3rd side). One or more of the following four types of coarsely crushed materials such as red mud, masashi, slate, karami, and blast furnace slag are blown together with nitrogen gas or air through a lance pipe (porcelain tube) in 1 minute (total of 200 Bubbling was performed by blowing nitrogen gas or air as an after-blow for 1 minute (approximately 4.3 qo/min), and after holding the temperature at 152,000 to 1,510 oo for 1 minute, the power switch was turned off and the furnace was taken out of the furnace at approximately 1,200 qo and cooled in air.
このスラグにつき溶出試験（環境庁告示方法）Ｘ線回折
による主含有鉱物、崩壊率の測定（ＡＳＴＭ規格のオー
トクレープ処理法で５肌〜１０肌の粒度につき行ない５
伽以下を崩壊物とした。Elution tests on this slag (methods notified by the Environment Agency) and measurement of main mineral content and disintegration rate by X-ray diffraction (conducted on particle sizes of 5 to 10 skins using the autoclave treatment method of ASTM standards)
Anything below the gate was considered to be a disintegrating object.
）等を行なった。第３表は、以上の実験の内の溶倒温度
についての測定結果を示すものである。), etc. Table 3 shows the measurement results regarding the melting temperature in the above experiments.
次に溶出試験結果を第４表に、Ｘ線回折による主含有鉱
物の生成状況結果を第５表に、Ｆ・Ｃａ○と崩壊率の測
定結果を第６表に示す。Next, Table 4 shows the elution test results, Table 5 shows the results of the formation status of the main minerals contained by X-ray diffraction, and Table 6 shows the measurement results of F.Ca○ and the disintegration rate.
試験スラグの化学分析値を第６表に、更に試製スラグの
残存Ｚｎ，Ｐｂ率を第７表にそれぞれ示す。The chemical analysis values of the test slag are shown in Table 6, and the residual Zn and Pb percentages of the trial slag are shown in Table 7.
−第３表
※Ｉ Ｐｂ Ｚ５重量協のダスト、※２ Ｐｂ ４．１
重量％のタスト船球
第５表
第６表
Ｃ２Ｓ ．．．２Ｃａ０．Ｓｉ○２ Ｇｅ．
．．２Ｃａ○‐Ａム２０３・Ｓｉ０２略 号 Ｃ
２Ｆ ・・・ ２Ｃａ○・Ｆｅ２０３ ＡＫ，．
．２Ｃａ○・Ｍ区○・２ＳｉＱＣ４ＡＦ ．・・ ４
Ｃａ０・Ａとの３・Ｆｅ２０３Ｈｅ，．．Ｆｅ２０３Ｃ
３Ａ ・・・ ３Ｃａ０．ＡＺの３ Ｍｇ．・・
Ｆｅ３０４第７表第８表
以上の実験結果から高炉スラグ、赤泥、カラミ、マサ士
及び粘板岩の一種若しくは二種以上を添加する効果はＰ
ｂイオンの溶出防止を行なうと共に、添加しないスラグ
に較べ、より低温でも溶融状態を保つことができて、ス
ラグの顕熱をより多く利用できる利点がある。-Table 3 *I Pb Z5 weight association dust, *2 Pb 4.1
Weight % Tust Ball Table 5 Table 6 C2S. ．． ．． 2Ca0. Si○2 Ge.
．． ．． 2Ca○-Amu203・Si02 Abbreviation C
2F...2Ca○・Fe203 AK,.
．． 2Ca○・M Ward○・2SiQC4AF.・・・ 4
3.Fe203He with Ca0.A,. ．． Fe203C
3A...3Ca0. AZ's 3 Mg.・・・
From the experimental results shown in Table 7 and Table 8 of Fe304, the effect of adding one or more of blast furnace slag, red mud, karami, masashi and slate is P.
In addition to preventing the elution of b ions, the slag has the advantage of being able to maintain a molten state even at lower temperatures than slag without addition, and making more use of the sensible heat of the slag.
次に本願処理方法の一実施例について述べる。Next, an embodiment of the present application processing method will be described.
〔実施例〕図に示すごとく、溶融スラグ１を入れたのる
鍋２（受達後、約２０分、約６０００ｋ９）をダスト処
理室３（揮化ダストが飛散しない様に三方を鉄板溶接し
、他の一方はのる鍋が入ると下部に若干、冷却物１５０
ｋ９を約７分間で入れた後、バルブ６を閉じて、エアー
のみを通し、あと吹きとして、バプリングを行ない綾化
物がほとんどなくなった（ダストベレット装入中止後、
約６分）時点で、ランスを溶融スラグから引き上げ、バ
ルブ４を閉じた。[Example] As shown in the figure, a pot 2 containing molten slag 1 (approximately 20 minutes after receipt, approximately 6000 k9) was placed in a dust treatment chamber 3 (iron plates were welded on three sides to prevent the volatilized dust from scattering). , and the other one has a small amount of cooling material at the bottom when the pot is put in.
After adding k9 for about 7 minutes, valve 6 was closed, only air was passed through, and bubbling was performed as an after-blow, and the twill was almost completely gone (after stopping the dust pellet charging,
At about 6 minutes), the lance was lifted from the molten slag and valve 4 was closed.
バブリング中に発生するＺｎ，Ｐｂ酸化物主体の空気導
入の為に空間を有したトピラを閉じ）に入れ、コンブレ
スドェアーをバルブ４を開いて、ランス５に通しながら
、ランス５を溶融スラグに装入し、バブリングを始め、
バルブ６を開いて、エアーと一緒にダストベレツト１
１を袋入し、ダストベレット６００ｋ９と粘板岩、マサ
士の１：１混合揮化ダストは集塵機７で回収した。この
スラグを冷却後、破砕、滋選処理して、溶出、路盤材試
験等を行なった。この場合に於ける路盤材試験結果を第
７表に、溶出試験結果を第８表に、又回収した金属酸化
物の分析値を第９表にそれぞれ示す。Close the topira which has a space for introducing air mainly composed of Zn and Pb oxides generated during bubbling), open the valve 4, and pass the comb drier through the lance 5, while the lance 5 is injected into the molten slag. Charge, start bubbling,
Open valve 6 and release dust bellet 1 along with air.
1 was placed in a bag, and the 1:1 mixed volatile dust of dust pellet 600k9, slate, and Masashi was collected by dust collector 7. After this slag was cooled, it was crushed and subjected to screening treatment, and was subjected to elution, roadbed material tests, etc. The roadbed material test results in this case are shown in Table 7, the elution test results are shown in Table 8, and the analytical values of the recovered metal oxides are shown in Table 9.
第７表
第８表
第９表
以上述べて来た如く、本願発明方法によれば、空気で代
表されるバブリングガスを吹き込む事と溶倒温度を低下
せしめ、かつ粘性低下を招く、添加材を添加することに
より反応が迅速かつ十分に進行するので有価金属の回収
率が高いと共に、処理後のスラグは無害化と共に崩壊も
防止されているので、路盤材等に有効利用されるもので
ある。Table 7 Table 8 Table 9 As mentioned above, according to the method of the present invention, the method of the present invention lowers the melting temperature by blowing bubbling gas, typically air, and adds additives that cause a decrease in viscosity. When added, the reaction proceeds quickly and sufficiently, resulting in a high recovery rate of valuable metals, and the treated slag is rendered harmless and prevented from disintegrating, so it can be effectively used for roadbed materials, etc.
図面は本発明の電気炉ダストの処理に使用する装置の−
実施例を示す系統図。The drawing shows the apparatus used for treating electric furnace dust according to the present invention.
System diagram showing an example.
Claims (1)
ラグ、赤泥、カラミ、マサ土及び粘板岩の中の一種以上
をバブリングガスと共に吹き込み、揮化する亜鉛、鉛を
主体とする金属酸化物を回収すると共に、電気炉ダスト
中に含まれる有害物を無害化することを特徴とする電気
炉ダストの処理方法。1. Blow one or more of blast furnace slag, red mud, karami, masa soil, and slate together with electric furnace dust pellets into the molten slag together with bubbling gas to recover metal oxides mainly consisting of zinc and lead that are volatilized. A method for treating electric furnace dust, characterized by rendering harmful substances contained in the electric furnace dust harmless.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56072531A JPS6028895B2 (en) | 1981-05-12 | 1981-05-12 | How to treat electric furnace dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56072531A JPS6028895B2 (en) | 1981-05-12 | 1981-05-12 | How to treat electric furnace dust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57185935A JPS57185935A (en) | 1982-11-16 |
| JPS6028895B2 true JPS6028895B2 (en) | 1985-07-08 |
Family
ID=13492012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56072531A Expired JPS6028895B2 (en) | 1981-05-12 | 1981-05-12 | How to treat electric furnace dust |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6028895B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129787A (en) * | 2014-08-18 | 2014-11-05 | 宋克纯 | Silicon carbide smelting equipment applied to tail gas recovery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6136143A (en) * | 1984-07-26 | 1986-02-20 | 日本磁力選鉱株式会社 | Treatment of steel slag |
-
1981
- 1981-05-12 JP JP56072531A patent/JPS6028895B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129787A (en) * | 2014-08-18 | 2014-11-05 | 宋克纯 | Silicon carbide smelting equipment applied to tail gas recovery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57185935A (en) | 1982-11-16 |
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