JPH08299835A - Disposal method for waste brick from metal melting furnace - Google Patents
Disposal method for waste brick from metal melting furnaceInfo
- Publication number
- JPH08299835A JPH08299835A JP11140295A JP11140295A JPH08299835A JP H08299835 A JPH08299835 A JP H08299835A JP 11140295 A JP11140295 A JP 11140295A JP 11140295 A JP11140295 A JP 11140295A JP H08299835 A JPH08299835 A JP H08299835A
- Authority
- JP
- Japan
- Prior art keywords
- brick
- waste
- steam
- bricks
- smelting furnace
- 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.)
- Granted
Links
- 239000011449 brick Substances 0.000 title claims abstract description 79
- 239000002699 waste material Substances 0.000 title claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 title claims abstract description 19
- 238000002844 melting Methods 0.000 title claims abstract 5
- 230000008018 melting Effects 0.000 title claims abstract 5
- 238000000034 method Methods 0.000 title claims description 20
- 239000010949 copper Substances 0.000 claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims abstract description 22
- 238000003723 Smelting Methods 0.000 claims description 32
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 26
- 239000000395 magnesium oxide Substances 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000006703 hydration reaction Methods 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 7
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 abstract 2
- 229910001629 magnesium chloride Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 2
- 239000011822 basic refractory Substances 0.000 description 1
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000011451 fired brick Substances 0.000 description 1
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- Y02W30/54—
Landscapes
- Processing Of Solid Wastes (AREA)
- Disintegrating Or Milling (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属溶錬炉の修理又は
解体時等に発生する廃レンガを粉砕することにより処理
する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating waste bricks by crushing waste bricks generated during repair or dismantling of a metal smelting furnace.
【０００２】[0002]
【従来の技術】金属溶錬炉から発生する廃レンガを再利
用するためには廃レンガを粉砕することが必要になる。2. Description of the Related Art In order to reuse waste bricks generated from a metal smelting furnace, it is necessary to crush the waste bricks.
【０００３】例えば、銅製錬において自溶炉、反射炉及
び転炉等で使用されているマグネシア−クロム焼成レン
ガ（通称「マグクロレンガ」）は、これらの炉の修理・
解体時には、多量の廃レンガの発生源となるが、炉内で
高温の溶湯と接触しているためにマット（銅−鉄硫化
物）や金属銅を多量に含んでいる。一方、加熱炉などの
廃レンガにはこのようなマットや金属銅が含浸していな
いので、廃レンガは炉材メーカーにおいて機械的に粉砕
された後にスタンプ材として再利用されている。しか
し、溶錬炉の廃レンガはマットや金属銅を含浸している
ため、銅含有率は１０〜２０重量％にも達し、粉砕法に
より得られた粉末又は塊材も多量のマット等を含有して
いるので、これらを炉材としての再利用することができ
ない。For example, magnesia-chromium fired bricks (commonly called "magcro bricks") used in flash smelting furnaces, reverberatory furnaces, converters and the like in copper smelting are used for repairing these furnaces.
When dismantled, it becomes a source of a large amount of waste bricks, but since it is in contact with the high temperature molten metal in the furnace, it contains a large amount of matte (copper-iron sulfide) and metallic copper. On the other hand, since waste bricks such as a heating furnace are not impregnated with such a mat or metallic copper, the waste bricks are mechanically crushed by a furnace material maker and then reused as a stamp material. However, since the waste bricks of the smelting furnace are impregnated with matte and metallic copper, the copper content reaches 10 to 20% by weight, and the powder or lump obtained by the pulverization method also contains a large amount of matte etc. Therefore, these cannot be reused as furnace materials.
【０００４】一方マットや金属銅は有価物であるため、
マットや金属銅を含浸した廃レンガを機械的に粉砕して
再度溶錬炉に繰返し溶解させることにより、廃レンガ中
の銅分を溶湯に回収することが一般に行われている。し
かし、マットや金属銅を含んだ廃レンガは粉砕性が悪い
上、溶錬炉に繰返して溶解することが可能な粒度、好ま
しくは１０ｍｍ以下に廃レンガを粉砕するには、２〜３
段の機械粉砕及び分級の操作が必要となる。このため粉
砕コストが高くなる。On the other hand, since mats and metallic copper are valuable materials,
It is generally practiced to mechanically pulverize a waste brick impregnated with a matte or metallic copper and then melt it again in a smelting furnace repeatedly to recover the copper content in the waste brick into a molten metal. However, waste bricks containing matte and metallic copper have poor grindability, and in order to grind waste bricks to a particle size that can be repeatedly melted in a smelting furnace, preferably 10 mm or less,
Mechanical crushing and classifying operations of stages are required. Therefore, the crushing cost becomes high.
【０００５】鉄鋼製錬において使用済みとなったマグネ
シアレンガの再利用法が例えば特開平６−１１６６１７
号公報で提案されている。この方法では、使用済みマグ
ネシアレンガを粉砕機械（ジョークラッシャ）により２
０ｍｍ以下に粉砕し、これをＭｇＯを主成分とする耐火
物を内張りした溶鋼製錬炉に繰り返して、溶解させるこ
とにより、スラグ中のＭｇＯ濃度を調整している。A method for reusing magnesia bricks used in iron and steel smelting is disclosed in, for example, Japanese Patent Laid-Open No. 6-116617.
It has been proposed in the publication. In this method, used magnesia bricks are crushed by a crushing machine (jaw crusher).
The MgO concentration in the slag is adjusted by crushing to 0 mm or less and repeating this to a molten steel smelting furnace lined with a refractory containing MgO as a main component to dissolve the slag.
【０００６】また、特開平６−９２７０１号公報による
と、廃レンガを建築材料としてリサイクルするために、
２０〜１２０ｍｍ程度の丸状物に粉砕する方法を提示し
ているが、この方法でもパイレン、ジョークラッシャ及
び角取り装置などの機械により廃レンガを粉砕してい
る。Further, according to Japanese Patent Laid-Open No. 6-92701, in order to recycle waste brick as a building material,
Although a method of crushing a round material of about 20 to 120 mm is presented, this method also crushes waste bricks by a machine such as a pyrene, a jaw crusher, and a chamfering device.
【０００７】以上のように、廃レンガを再使用処理する
ために粉砕する必要がある場合、粉砕機械を使って粉砕
することが一般的に行われている方法である。As described above, when it is necessary to grind waste bricks for reuse, it is a generally practiced method to grind them using a grinding machine.
【０００８】[0008]
【発明が解決しようとする課題】溶錬炉を解体又は修理
する際に発生する廃レンガの寸法は成型されたときの寸
法のものからこれより大きい塊まで様々である。そし
て、数百ｍｍ大の廃レンガも多く発生するので、これを
例えば２０ｍｍ以下に粉砕しようとすると、２〜３段の
粉砕機及び分級設備が必要であるので設備費が大きく、
また２〜３段粉砕・分級は容易な作業ではない。よっ
て、より簡単に細かく粉砕する方法が望まれている。The size of the waste bricks generated when disassembling or repairing the smelting furnace varies from the size of the as-molded bricks to larger chunks. And, since many waste bricks with a size of several hundred mm are also generated, if this is to be crushed to, for example, 20 mm or less, a crusher of 2 to 3 stages and classification equipment are required, so the equipment cost is large,
Also, crushing and classifying in two or three steps is not an easy task. Therefore, a method of easily and finely pulverizing is desired.
【０００９】また、銅の溶錬炉から発生する廃レンガ中
の銅分は網目状にレンガの内部に浸透しているので、廃
レンガから確実に銅分を回収するには、廃レンガを溶錬
炉に繰り返した際に、レンガ部分に速やかに溶解できる
ように、粉砕粒度を可能な限り細かくすることが望まし
い。しかしながら、粉砕粒度をより細かくするために
は、さらに粉砕・分級段数が増加し、設備数及びランニ
ングコストが増大するという問題があった。Further, since the copper content in the waste brick generated from the copper smelting furnace penetrates inside the brick in a mesh shape, the waste brick must be melted in order to surely recover the copper content from the waste brick. It is desirable to make the crushed particle size as fine as possible so that it can be quickly dissolved in the brick part when it is repeatedly used in the smelting furnace. However, in order to make the crushed particle size finer, there is a problem that the number of crushing / classifying stages is further increased, and the number of equipment and the running cost are increased.
【００１０】[0010]
【課題を解決するための手段】本発明は、上述の問題点
を解決する方法であって、金属溶錬炉の使用済み廃レン
ガを２気圧以上の水蒸気と接触せしめることにより粉砕
することを特徴とする金属溶錬炉の廃レンガ処理方法を
提供する。以下、本発明の構成を説明する。DISCLOSURE OF THE INVENTION The present invention is a method for solving the above-mentioned problems, characterized in that used waste bricks of a metal smelting furnace are crushed by bringing them into contact with steam of 2 atm or more. A method for treating waste bricks of a metal smelting furnace is provided. The configuration of the present invention will be described below.
【００１１】本発明において廃レンガは金属の溶錬炉に
通常使用される塩基性耐火レンガであり、特にＭｇＯ及
び／又はＣａＯを主成分とし、より好ましくはマグクロ
レンガ、マグネシアレンガである。ＭｇＯ及びＣａＯは
水との反応により水和反応（通称「スレーキング）を起
こすことが知られている。本発明においては、ＭｇＯ等
を含む廃レンガでは水和反応がその塊の内部で起こっ
て、局部的に体積が膨張することを利用して、解体され
たままの廃レンガを粉状に破壊する。この反応と体積膨
張を廃レンガの破壊に有効に利用するためには水蒸気雰
囲気は圧力が２気圧以上であることが必要である。この
ように加圧条件で水蒸気処理を行うことにより強制的に
スレーキングを進行させ、廃レンガを細かく粉砕するこ
とができる。In the present invention, the waste brick is a basic refractory brick that is usually used in a metal smelting furnace, and particularly contains MgO and / or CaO as a main component, and more preferably magcro brick and magnesia brick. It is known that MgO and CaO cause a hydration reaction (commonly referred to as “slaking”) by a reaction with water.In the present invention, in a waste brick containing MgO or the like, a hydration reaction occurs inside the mass, By utilizing the local volume expansion, the as-disassembled waste brick is destroyed into powder.To effectively utilize this reaction and volume expansion for destruction of the waste brick, the steam atmosphere must be It is necessary that the pressure is 2 atm or more, and thus, the steam treatment is performed under the pressurized condition to forcibly advance the slaking and the waste brick can be finely pulverized.
【００１２】水蒸気の温度は１００℃以上３１０℃以下
が好ましく、望ましくは１５０℃以上２５０℃以下であ
る。これらを飽和水蒸気圧力に換算すると１．０気圧以
上、１００気圧以下望ましくは４．９気圧以上４０気圧
以下である。一般的に言って、水蒸気圧力は高いほうが
水和反応の速度が大きく、粉砕が短時間で完了する。一
方、水蒸気圧を高くすると、反応装置の密閉性及び耐圧
性確保のために装置製作費用が高くなるので、必要以上
に圧力を高めるのは好ましくない。したがって好ましい
水蒸気圧力は上記範囲である。本発明が特徴とする水蒸
気による処理はオートクレーブ内で行うことが好まし
い。この場合標準的処理時間は８〜１２時間である。The temperature of the steam is preferably 100 ° C. or higher and 310 ° C. or lower, and more preferably 150 ° C. or higher and 250 ° C. or lower. When these are converted into saturated water vapor pressure, the pressure is 1.0 atm or more and 100 atm or less, and preferably 4.9 atm or more and 40 atm or less. Generally speaking, the higher the steam pressure, the higher the rate of hydration reaction, and the crushing is completed in a short time. On the other hand, if the water vapor pressure is increased, the manufacturing cost of the device is increased in order to secure the tightness and pressure resistance of the reaction device, so it is not preferable to increase the pressure more than necessary. Therefore, the preferable steam pressure is in the above range. The steam treatment, which is a feature of the present invention, is preferably performed in an autoclave. In this case, the standard processing time is 8 to 12 hours.
【００１３】廃レンガは銅の溶錬炉のみならず鉄鋼その
他の金属の溶錬炉から発生するものであっても本方法に
より処理をすることが可能である。銅の溶錬炉の廃レン
ガは一般に有価成分として、Ｃｕ：１０〜１５重量％、
Ａｕ：３０ｐｐｍ，Ａｇ：０．０１重量％，Ｐｂ０．１
重量％，Ｚｎ：０．１％などを含有している。これらの
成分を含有する廃レンガは本発明法により粉砕した後に
銅の溶錬炉に繰り返して、有価金属を回収する。Waste bricks can be treated by this method even if they are generated not only from copper smelting furnaces but also from steel and other metal smelting furnaces. Abandoned bricks in a copper smelting furnace are generally used as valuable components, and Cu: 10 to 15% by weight,
Au: 30 ppm, Ag: 0.01 wt%, Pb0.1
%, Zn: 0.1%, etc. are contained. Waste bricks containing these components are crushed by the method of the present invention and then repeatedly placed in a copper smelting furnace to recover valuable metals.
【００１４】[0014]
【作用】上記の水和反応は、ＭｇＯの場合ＭｇＯ＋Ｈ2
Ｏ→Ｍｇ（ＯＨ）2 と表される。常温・常圧下では、こ
の水和反応は緩やかに進行するため、マグクロレンガ等
では、完全に粉砕するのに数日以上かかる。またマグク
ロレンガは常温の水に浸漬した場合では、１４日間かけ
てもレンガに全く変化が生じない。さらに、１０５℃の
水蒸気（飽和水蒸気圧力≒１気圧）に２０時間曝して
も、ようやく亀裂が生じる程度である。しかし、この水
和反応において水蒸気圧力を高めれば、反応速度が大き
くなり、短い時間で粉砕することが可能となる。以上Ｍ
ｇＯについて説明したが、ＣａＯの場合も同様に短時間
粉砕が可能である。以下、実施例によりさらに詳しく本
発明を説明する。In the case of MgO, the above hydration reaction is MgO + H 2
It is represented as O → Mg (OH) 2 . Since this hydration reaction proceeds slowly at room temperature and atmospheric pressure, it takes several days or more to completely pulverize magcro bricks and the like. Further, when the magro brick is immersed in water at room temperature, the brick does not change even after 14 days. Further, even when exposed to steam at 105 ° C. (saturated steam pressure ≈1 atm) for 20 hours, cracks are finally generated. However, if the water vapor pressure is increased in this hydration reaction, the reaction rate will be increased and it will be possible to pulverize in a short time. Or more M
Although gO has been described, CaO can also be ground for a short time in the same manner. Hereinafter, the present invention will be described in more detail with reference to examples.
【００１５】[0015]
実施例１ 銅溶錬炉のマグクロ廃レンガを、Ａ：金属銅浸入レンガ
及びＢ：銅硫化物（鉄分も含有）浸入レンガの２種類に
分別し、実験に供した。実験用のオ−トクレ−ブ（内容
積１．０リットル）を用いて、表１に示す３つの条件で
廃レンガＡ及びＢの処理実験を行った。Example 1 The maguro waste bricks of the copper smelting furnace were separated into two types, A: metallic copper infiltration bricks and B: copper sulfide (also containing iron) infiltration bricks, and used for the experiment. Using an experimental autoclave (internal volume of 1.0 liter), treatment experiments of waste bricks A and B were performed under the three conditions shown in Table 1.
【００１６】[0016]
【表１】 温度（℃） 水蒸気圧（気圧） 保持時間（Ｈr ） 条件 i ２２５ ２８ ７．０ 条件 ii ２００ １７ ７．０ 条件 iii １５０ ５ ７．０ [Table 1] Temperature (° C) Water vapor pressure (atmosphere) Holding time (Hr) Conditions i 225 28 7.0 Conditions ii 200 17 7.0 Conditions iii 150 5 7.0
【００１７】その結果得られた粉砕程度を表２に示す。The pulverization degree obtained as a result is shown in Table 2.
【００１８】[0018]
【表２】 廃レンガＡ 廃レンガＢ 条件 i 全壊（粉状） 全壊（粉状） 条件 ii 全壊（粉状） 全壊（一部粒状） 条件 iii 半壊（粒状） 半壊（粒状） [Table 2] Waste brick A Waste brick B Condition i Fully destroyed (powder) Completely destroyed (powder) Condition ii Completely destroyed (powder) Completely destroyed (partially granular) Condition iii Half destroyed (granular) Half destroyed (granular)
【００１９】以上の結果から条件iii 以上の高温・高圧
であれば廃レンガを十分効率的に粉砕できることがわか
った。From the above results, it was found that the waste bricks can be crushed sufficiently efficiently if the temperature and pressure are higher than the condition iii.
【００２０】実施例２ 銅溶錬炉から発生したマグクロ廃レンガで大半の大きさ
が１２０ｍｍ×１５０ｍｍ×２５０ｍｍ程度の長方体状
であり、最も小さいものでも１辺の長さが１００ｍｍの
立方体より大きい廃レンガを実操業用のオートクレーブ
（内容積３．８ｍ3 ）を用いて水蒸気処理した。実験条
件は、水蒸気圧力（最大）１５．９気圧、最大圧力での
保持時間１０時間であった。その結果、処理後の廃レン
ガも粒度分布を測定した結果を表３に示す。Example 2 Most of magro waste bricks generated from a copper smelting furnace have a rectangular shape of about 120 mm × 150 mm × 250 mm, and even the smallest one has a side length of 100 mm. A large waste brick was steamed using an autoclave (internal volume 3.8 m 3 ) for actual operation. The experimental conditions were a water vapor pressure (maximum) of 15.9 atm and a holding time at the maximum pressure of 10 hours. As a result, Table 3 shows the result of measuring the particle size distribution of the treated waste bricks.
【００２１】[0021]
【表３】 粒度 廃レンガＡ 廃レンガＢ ＋３０ｍｍ − ５ −３０／＋１０ｍｍ ７ ８ −１０／＋３ｍｍ １５ １１ −３ｍｍ ７８ ７６ [Table 3] Grain size Waste brick A Waste brick B +30 mm -5 -30 / + 10 mm 7 8 -10 / + 3 mm 15 11 -3 mm 78 76
【００２２】比較例１ 常温の水に廃レンガＡ及びＢを浸漬し、毎日外観と圧壊
強度を調べた。その結果、廃レンガＡ、Ｂともに１４日
経過してもこれらの性質は全く変化が生じなかった。Comparative Example 1 Waste bricks A and B were immersed in water at room temperature, and the appearance and crush strength were examined every day. As a result, the properties of the waste bricks A and B did not change even after 14 days.
【００２３】比較例２ 円筒容器内（内容積５リットル）に廃レンガ（８０ｍｍ
角）を入れ、容器へ水蒸気（水蒸気圧＝１気圧）を流し
続けた。その間、容器内の温度は１００〜１０５℃で推
移した。２０時間経過した後、容器から廃レンガを取り
出して調べたところ、幅１ｍｍ長さ３ｍｍ程度の亀裂が
発生した程度で、圧壊強度は変化しなかった。Comparative Example 2 A waste brick (80 mm) was placed in a cylindrical container (internal volume: 5 liters).
Corner was put and steam (water vapor pressure = 1 atm) was continuously flown into the container. During that time, the temperature in the container was maintained at 100 to 105 ° C. After 20 hours, the waste brick was taken out from the container and examined. As a result, a crack having a width of 1 mm and a length of 3 mm was generated, and the crush strength did not change.
【００２４】比較例３ 粉砕機１：ジョークラッシャ（出力７５ｋＷ）及び粉砕
機２：ハンマークラッシャ（出力５５ｋＷ）を用いて、
機械による粉砕についても実験を行った。 実験条件 廃レンガ（Ｂ）の元々の大きさは２００〜４００ｍ
ｍ， 粉砕機１で１段目、粉砕機２で２段目の粉砕を行っ
た。 各粉砕機では噛み込み等のトラブルが起きない範囲
で、出来るだけ細かく粉砕した。その結果を表４（粉砕
後の寸法に対する割合（重量％））に示す。Comparative Example 3 Using a crusher 1: jaw crusher (output 75 kW) and a crusher 2: hammer crusher (output 55 kW),
Experiments were also conducted on mechanical grinding. Experimental condition Original size of abandoned brick (B) is 200-400m
The first stage was pulverized by the pulverizer 1 and the second stage was pulverized by the pulverizer 2. Each crusher was crushed as finely as possible without causing problems such as biting. The results are shown in Table 4 (ratio (% by weight) to the size after crushing).
【００２５】[0025]
【表４】 粉砕機１処理後 粉砕機２処理後 ＋１００ｍｍ − −＊ −１００／＋８０ｍｍ ４．８ −＊ −８０／＋５０ｍｍ ２２．２ −＊ −５０／＋３０ｍｍ ３８．７ ３８．５ −３０／＋１０ｍｍ ２５．９ ４１．４ −１０／＋５ｍｍ ４．３ ８．３ −５ｍｍ ４．１ １１．８ 備考 ＊：粉砕機２では構造上５０ｍｍアンダーしか排出されない。[Table 4] After treatment with crusher 1 After treatment with crusher 2 +100 mm −− * −100 / + 80 mm 4.8 − * −80 / + 50 mm 22.2 − * −50 / + 30 mm 38.7 38.5 −30 / + 10 mm 25.9 41.4 −10 / + 5 mm 4.3 8.3 −5 mm 4.1 11.8 Remarks *: In the crusher 2, only 50 mm under is discharged due to the structure.
【００２６】表４を実施例２の表３と比較すると、粉砕
後の粒度が粗いことが判る。機械による粉砕法で、実施
例２（高圧水蒸気によるスレーキング）と同等の粒度に
粉砕しようとすると、さらに追加で１〜２段の粉砕が必
要となる。Comparison of Table 4 with Table 3 of Example 2 shows that the particle size after grinding is coarse. When it is attempted to grind to a particle size equivalent to that of Example 2 (slaking with high-pressure steam) by a mechanical grinding method, it is necessary to additionally grind 1 to 2 stages.
【００２７】[0027]
【発明の結果】従来は、廃レンガを溶錬炉に繰り返す際
に前処理として、機械的粉砕を行なっていたが、本発明
では、化学反応すなわち酸化物の水和反応を利用して粉
砕するので、容易に細かく粉砕できる。細かく粉砕する
ことにより、廃レンガに含まれている有価物の回収が容
易となる。すなわち、細かく粉砕された廃レンガは、繰
り返された溶錬炉において確実に溶解し、銅分などの有
価物が溶湯に回収されレンガ分はスラグに移行する。Results of the Invention Conventionally, mechanical crushing was carried out as a pretreatment when repeating waste bricks in a smelting furnace, but in the present invention, it is crushed by utilizing a chemical reaction, that is, a hydration reaction of oxides. Therefore, it can be easily finely ground. By pulverizing finely, it becomes easy to collect valuables contained in the waste brick. That is, the waste bricks finely crushed are reliably melted in the repeated smelting furnace, valuable materials such as copper are recovered in the molten metal, and the bricks are transferred to slag.
【００２８】また、有価物の回収目的以外にも、産業廃
棄物として埋め立て等の処分が難しい廃レンガを溶錬炉
でスラグに溶解させ廃棄可能とする場合や、建築材料と
してリサイクルする場合などにも廃レンガの前処理（粉
砕）方法として有効である。In addition to the purpose of recovering valuable materials, when waste bricks that are difficult to dispose of such as landfill as industrial waste are dissolved in slag in a smelting furnace for disposal, or when recycled as building materials, etc. Is also effective as a pretreatment (crushing) method for waste bricks.
Claims (4)
以上の水蒸気と接触させることにより粉砕することを特
徴とする金属溶錬炉の廃レンガ処理方法。1. A method for treating waste bricks in a metal smelting furnace, which comprises crushing used waste bricks in the metal smelting furnace by bringing them into contact with steam having a pressure of 2 atm or more.
ことを特徴とする請求項１記載の金属溶錬炉の廃レンガ
処理方法。2. The method for treating waste bricks in a metal smelting furnace according to claim 1, wherein the contact treatment is performed in an autoclave.
を特徴とする請求項１又は２記載の金属溶錬炉の廃レン
ガ処理方法。3. The method of treating waste bricks in a metal smelting furnace according to claim 1, wherein the metal smelting furnace is a copper smelting furnace.
レンガを銅の溶錬炉にて溶解することを特徴とする金属
溶錬炉の廃レンガ処理方法。4. A method for treating waste bricks in a metal smelting furnace, which comprises melting the waste bricks crushed by the method according to claim 3 in a copper smelting furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11140295A JP3292271B2 (en) | 1995-05-10 | 1995-05-10 | Waste brick treatment method for metal smelting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11140295A JP3292271B2 (en) | 1995-05-10 | 1995-05-10 | Waste brick treatment method for metal smelting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08299835A true JPH08299835A (en) | 1996-11-19 |
| JP3292271B2 JP3292271B2 (en) | 2002-06-17 |
Family
ID=14560249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11140295A Expired - Lifetime JP3292271B2 (en) | 1995-05-10 | 1995-05-10 | Waste brick treatment method for metal smelting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3292271B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011202196A (en) * | 2010-03-24 | 2011-10-13 | Sumitomo Metal Mining Co Ltd | Method for processing acid-resistant waste brick |
| JPWO2023026802A1 (en) * | 2021-08-27 | 2023-03-02 |
-
1995
- 1995-05-10 JP JP11140295A patent/JP3292271B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011202196A (en) * | 2010-03-24 | 2011-10-13 | Sumitomo Metal Mining Co Ltd | Method for processing acid-resistant waste brick |
| JPWO2023026802A1 (en) * | 2021-08-27 | 2023-03-02 | ||
| WO2023026802A1 (en) * | 2021-08-27 | 2023-03-02 | Ｊｆｅスチール株式会社 | Recycling method for magnesia carbon bricks |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3292271B2 (en) | 2002-06-17 |
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