JPH08290934A - Production of high-strength rock wool - Google Patents
Production of high-strength rock woolInfo
- Publication number
- JPH08290934A JPH08290934A JP7117630A JP11763095A JPH08290934A JP H08290934 A JPH08290934 A JP H08290934A JP 7117630 A JP7117630 A JP 7117630A JP 11763095 A JP11763095 A JP 11763095A JP H08290934 A JPH08290934 A JP H08290934A
- Authority
- JP
- Japan
- Prior art keywords
- rock wool
- waste
- rockwool
- fired
- electric 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
- C03B1/02—Compacting the glass batches, e.g. pelletising
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、断熱材、吸音内装材及
び各種補強繊維などに利用するのに良好な、不純物含有
量が少なく、高強度を有するロックウールを製造するに
際し、良好な製造状況を維持するのに有効な製造方法に
関する。FIELD OF THE INVENTION The present invention is suitable for producing rock wool having a small amount of impurities and high strength, which is suitable for use in heat insulating materials, sound absorbing interior materials and various reinforcing fibers. It relates to a manufacturing method effective for maintaining the situation.
【０００２】[0002]
【従来の技術】ロックウールは高炉スラグや天然石等の
原料に成分調整用原料としてケイ石などをコークスと共
にキュポラ上部より供給し、下部より空気ないし酸素富
化空気を吹き込み、燃焼させることによって溶融し、そ
の溶湯を高速回転体で繊維化して製造されるキュポラを
用いる方法と高炉で発生した溶融スラグを電気炉にホッ
トチャージし、ランスを介してケイ砂などの成分調整剤
を不活性ガスと共に溶融スラグに吹き込み、溶湯をバブ
リングして、ケイ砂の溶融と均質化を行うダイレクト法
が知られている。いずれの場合にも繊維化の際に、未繊
維化粒（ショット屑）が１５〜２０％発生し、この再利
用に関しては電気炉などで再溶融してロックウール製造
原料として使う方法、セメント製造時の添加物として使
う方法、あるいは廃棄する方法等が主なものであった。
またショット屑や水砕スラグのような粒をキュポラで使
用するため、ロータリーキルン等で焼成し、塊状化する
方法が特開平６−１７１９７９で提案されている。電気
炉に投入して使用する場合は、ショット屑に含有されて
いる金属鉄、炭素、硫黄等の不純物などのロックウール
の強度を悪くする溶融欠点が、炭素電極を使用する電気
炉雰囲気のために酸化されずに残り、その溶湯を用いて
繊維化したロックウールは依然強度が低いままである。
又、ロータリーキルンで焼成し、塊状化した焼成塊状物
をキュポラに投入して使用する方法は、焼成によって金
属鉄、炭素、硫黄等溶融欠点が酸化されることによって
改善されるものの、塊状の焼成物をキュポラに再投入し
て溶融する過程で、キュポラの還元雰囲気により、焼成
により酸化鉄となったものが還元され金属鉄に逆戻り
し、さらにコークスによる炭素や硫黄等が付加されて溶
湯に入り込むため、繊維化されたロックウールの強度は
改善されないままである。2. Description of the Related Art Rockwool is melted by supplying silica stone and the like from the upper part of the cupola together with coke as a raw material for component adjustment to raw materials such as blast furnace slag and natural stone, and blowing air or oxygen-enriched air from the lower part to burn it. , A method using a cupola produced by fiberizing the molten metal with a high-speed rotating body and hot-charging the molten slag generated in the blast furnace into an electric furnace, and melting a component adjusting agent such as silica sand with an inert gas via a lance. A direct method is known in which slag is blown and the molten metal is bubbled to melt and homogenize silica sand. In both cases, 15 to 20% of non-fibrous granules (shot waste) are generated during fiberization, and regarding this reuse, a method of remelting in an electric furnace or the like and using as a raw material for rock wool production, cement production The main method was to use it as an additive or to dispose of it.
Further, since particles such as shot dust and granulated slag are used in a cupola, a method of firing in a rotary kiln or the like to agglomerate is proposed in Japanese Patent Laid-Open No. 6-171979. When throwing into an electric furnace and using it, the melting defect that deteriorates the strength of rock wool such as metallic iron, carbon, sulfur and other impurities contained in shot scrap is due to the electric furnace atmosphere where the carbon electrode is used. The rockwool, which is not oxidized to remain and is made into fibers by using the molten metal, still has low strength.
Further, the method of using a lumpy baked lump that is fired in a rotary kiln and put into a cupola is used, but the calcination of the lump is made though the melting defects such as metallic iron, carbon, and sulfur are oxidized by the firing. In the process of re-injecting into the cupola and melting it, the reducing atmosphere of the cupola reduces the iron oxide that has been burnt to return to metallic iron, and carbon and sulfur from coke are added to the molten metal. , The strength of fiberized rockwool remains unimproved.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、前記問題点
を解決し、良好な製造状態を維持するのに障害となる事
項を取り除き、断熱材、吸音内装材及び各種補強材など
に利用するのに良好な、不純物含有量が少なく、高強度
を有するロックウールを製造する方法を提供することを
課題とする。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, eliminates the obstacles for maintaining a good production state, and utilizes the same as a heat insulating material, a sound absorbing interior material and various reinforcing materials. It is an object of the present invention to provide a method for producing a rockwool that is excellent in, has a small amount of impurities, and has high strength.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、現行のロ
ックウール中に存在する非酸化物系の微小な不純物、特
に金属鉄、リン化鉄、硫化鉄、硫黄、炭素等の溶融欠点
がロックウールを脆弱にしていること、又従来のコーク
スを使用したキュポラあるいはカーボン電極を使用した
電気炉では還元雰囲気下で溶融されるため非酸化物系の
不純物は酸化されない状態でロックウールに含有される
ことを見出だし、ロックウールを高強度にするにはこれ
ら非酸化物の不純物を酸化させ溶湯中に溶解させること
が必要と考え、ショット屑や水砕スラグを主成分とする
原料を酸化雰囲気下で最高焼成温度が９００〜１３００
℃で１分以上焼成した後、電気炉等に投入し、溶融する
ことに関わる特許出願を既に行っている。なお、電気炉
の雰囲気は焼成物の顕熱を有効に利用するために１２０
０℃前後の温度に維持されている。焼成の具体的手段と
して、ロータリーキルンを使用し、最高温度を１２００
℃とした場合、焼成物は塊状化し、その大きさは３０〜
３００ｍｍ（平均径）が主体であり、大きな塊の中心部
はロータリーキルンで焼成中、焼成不足から酸化されな
い不純物が残る傾向がある。これらの大きな塊はなんら
かの方法で、微細化された粒の大きさになっていれば、
１２００℃前後に保持されている電気炉に落とされ、堆
積し、溶融されるまでの間に酸化が促進され、完了する
ことになる。又、この大きさの焼成物が直結する電気炉
に投入される際に、約３ｍの落差をもって、溶融炉に挿
入されている電極及びその支持装置に当たり、装置を破
損・損傷すること、又電気炉の液面の原料堆積物状に落
下する衝撃により、炉の安定操業を乱す危険がある。上
記に述べたような大きな塊状物の酸化不足傾向と電気炉
への落下時の危険を回避するために、ロータリーキルン
で焼成され、塊状化された焼成物を、電気炉に投入する
前に、水冷式圧延ロール又はスクリューで圧壊、粉砕
し、粒状の形状にして炉に投入することが課題を解決す
るための骨子である。DISCLOSURE OF THE INVENTION The inventors of the present invention have found that non-oxide type minute impurities existing in the current rock wool, particularly, melting defects of metallic iron, iron phosphide, iron sulfide, sulfur, carbon and the like. Weakens rock wool, and non-oxide impurities are contained in rock wool in a state where it is not oxidized because it is melted in a reducing atmosphere in an electric furnace using a conventional cupola or carbon electrode that uses coke. It was found that it is necessary to oxidize these non-oxide impurities and dissolve them in the molten metal in order to increase the strength of rockwool, and the raw materials mainly composed of shot dust and granulated slag are oxidized. The maximum firing temperature is 900-1300 in the atmosphere
We have already filed a patent application related to melting by firing in an electric furnace etc. after firing at ℃ for 1 minute or more. Note that the atmosphere of the electric furnace is set to 120 in order to effectively use the sensible heat of the fired product.
The temperature is maintained around 0 ° C. A rotary kiln is used as a concrete means for firing, and the maximum temperature is 1200.
When the temperature is set to ℃, the fired product becomes lumpy and its size is 30-
Mainly 300 mm (average diameter), the central portion of a large lump tends to remain unoxidized impurities during firing in a rotary kiln due to insufficient firing. If these large lumps are made into a fine grain size by some method,
It is dropped into an electric furnace maintained at about 1200 ° C., and oxidation is promoted until it is deposited and melted, and is completed. Also, when a fired product of this size is put into an electric furnace directly connected to it, the electrode and its supporting device inserted in the melting furnace may be hit or damaged by a drop of about 3 m, and the device may be damaged or damaged. There is a risk that the stable operation of the furnace may be disturbed by the impact of falling in the form of a raw material deposit on the surface of the furnace. In order to avoid the above-mentioned tendency of large lumps of insufficient oxidization and the risk of falling into an electric furnace, the calcinated lumps fired in a rotary kiln are cooled with water before being put into an electric furnace. The essence is to solve the problem by crushing and crushing with a type rolling roll or screw to make it into a granular shape and putting it into the furnace.
【０００５】以下、これら手段たる構成並びにその作用
を図面により、詳しく説明すると、次の通りである。The structure and operation of these means will be described in detail below with reference to the drawings.
【０００６】図１はショット屑、水砕スラグ等の原料が
粒度調整された後、ロータリーキルンに投入、焼成さ
れ、ロータリーキルンを出る塊状の焼成物が圧延ロール
等により圧壊・粉砕されて粒状物となり、電気溶融炉に
落とされ、溶融された溶湯が高速回転体により繊維化さ
れる工程の流れを示す説明図である。In FIG. 1, raw materials such as shot dust and granulated slag are adjusted in particle size, then charged into a rotary kiln and fired, and a lumpy fired product leaving the rotary kiln is crushed and crushed by a rolling roll or the like to be a granular substance, It is explanatory drawing which shows the flow of the process of which the molten metal dropped into the electric melting furnace and melted is made into fiber by a high-speed rotating body.
【０００７】図において、ロータリーキルン１は耐火物
２で内張りされており、ガスないし重油バーナー３で加
熱され所定の温度が維持されている。投入されたショッ
ト屑などの原料４は投入口５より投入され、ロータリー
キルン内で乾燥・焼成されて塊状の焼成物６となり、水
冷式圧延ロール７ないしスクリュー（図示せず）で圧壊
・粉砕されて、粒状の焼成物８となる。これら粒状化さ
れた焼成物は電気炉９の溶湯表面状に山状１０に堆積す
る。電気炉は炉壁１１と炉蓋１２で構成され、水冷構造
ないし耐火物により形成されており、３本のモリブテン
電極は酸化されて消耗されることを防ぐために、水冷式
ホルダー１４が取り付けられている。電気炉内は電極に
より１４５０〜１５５０℃に加熱され、堆積した粒状の
焼成原料８を加熱・溶融し、溶湯１５となり、溶湯出口
１６を通り、前炉１７内で溶湯の温度を調整された後出
湯１８となり、高速回転体１９により繊維化されてロッ
クウール２０が形成される。In the figure, a rotary kiln 1 is lined with a refractory 2 and heated by a gas or heavy oil burner 3 to maintain a predetermined temperature. The raw material 4 such as shot waste that has been input is input from an input port 5, dried and fired in a rotary kiln to form a lump-shaped fired product 6, which is crushed and crushed by a water-cooled rolling roll 7 or a screw (not shown). Then, a granular fired product 8 is obtained. These granulated fired products are deposited in a mountain shape 10 on the surface of the molten metal in the electric furnace 9. The electric furnace is composed of a furnace wall 11 and a furnace lid 12, and is formed of a water-cooled structure or refractory. A water-cooled holder 14 is attached to prevent the three molybdenum electrodes from being oxidized and consumed. There is. The inside of the electric furnace is heated to 1450 to 1550 ° C. by the electrodes, and the deposited granular firing raw material 8 is heated and melted to become the molten metal 15, which passes through the molten metal outlet 16 and after the temperature of the molten metal is adjusted in the front furnace 17 The tap water 18 is formed, and is fiberized by the high-speed rotating body 19 to form the rock wool 20.
【０００８】圧延ロール６ないしスクリューは高温の塊
状焼成物と接触するため、耐熱鋼で構成され、水冷され
ている。ロータリーキルンを出る高温の焼成物は、平均
径で３０〜３００ｍｍの塊状を主体に粒状物や粉体の形
で構成されているが、多孔質の上、比較的壊れやすく、
且つ高温状態に保たれているため、水冷の圧延ロールに
接触すると熱的にも圧壊を促進する。圧壊される焼成物
の大きさは、圧延ロール間の間隔を調整することによっ
て調整される。圧延ロール方式の替わりに水冷式の対の
スクリューを使用しても目的を達することができる。塊
状の焼成物を圧壊して粒状にすることによって、電気炉
の雰囲気内での未酸化不純物の酸化を促進し、且塊状焼
成物が炉雰囲気中を約３ｍ落下して投入される際に、炉
内部の電極やホルダーなどの支持体を損傷して炉へのダ
メージを与えるあたへたり、落下のショックによる操業
の乱れが回避される。The rolling roll 6 or the screw is made of heat-resistant steel and is water-cooled because it comes into contact with the high-temperature massive fired product. The high-temperature fired product exiting the rotary kiln is mainly composed of lumps with an average diameter of 30 to 300 mm in the form of granules or powder, but it is relatively fragile due to its porous nature.
Moreover, since it is kept at a high temperature, it also promotes thermal collapse when it comes into contact with a water-cooled rolling roll. The size of the fired product to be crushed is adjusted by adjusting the distance between the rolling rolls. The purpose can be achieved by using a pair of water-cooled screws instead of the rolling roll system. By crushing the agglomerated fired product into granules, the oxidation of unoxidized impurities in the atmosphere of the electric furnace is promoted, and when the agglomerated fired product is dropped by about 3 m in the furnace atmosphere and charged, It is possible to avoid warming up that damages the support such as the electrodes and holders inside the furnace and damage to the furnace, and disruption of operation due to the shock of dropping.
【０００９】電気炉に投入する焼成原料の大きさは、電
気炉内で未酸化物の酸化を促進し、完了させるためには
実質４０ｍｍ以下の径であることが必要である。なお、
実質という意味は圧壊・粉砕物が必ずしも球状でないの
で最長と最短の平均値を簡便上採用していることを示し
ている。またロータリーキルンの焼成物出口から電気炉
湯面までの距離が約３ｍあり、落下物が電気炉に挿入さ
れているモリブテン電極や水冷ホルダーに万一当たっ
て、損傷を与えたり、湯面上に落下した時の衝撃で湯面
が動揺して湯面制御を乱す等の問題を考慮すると平均径
４０ｍｍ以下の粒状であることが必要である。ちなみに
２００ｍｍ径の塊状焼成物であれば、重量は約４．２ｋ
ｇ、３００ｍｍ径の塊状焼成物では約１４ｋｇの重量と
なる。これらの重量物が落差３ｍの距離を落下すれば、
破壊力は極めて大きいものとなる。The size of the firing raw material charged into the electric furnace needs to be substantially 40 mm or less in order to accelerate and complete the oxidation of the non-oxide in the electric furnace. In addition,
The meaning of “substantial” means that the average value of the longest and the shortest is simply adopted because the crushed / crushed material is not necessarily spherical. In addition, there is a distance of about 3m from the fired product outlet of the rotary kiln to the surface of the electric furnace, and the fallen objects may hit the molybden electrode or the water-cooled holder inserted in the electric furnace, causing damage or dropping onto the surface of the molten metal. Considering the problem that the surface of the molten metal fluctuates due to the impact and disturbs the control of the molten metal surface, it is necessary that the average diameter is 40 mm or less. By the way, if it is a massive fired product with a diameter of 200 mm, the weight is about 4.2 k.
In the case of a lump-shaped fired product having a diameter of 300 g and a diameter of 300 mm, the weight is about 14 kg. If these heavy objects fall a distance of 3m,
Destructive power is extremely large.
【００１０】ロックウール製造工程で発生するショット
屑は全溶融量の１５〜２０％であり、日産４５０トンの
平均的ロックウール生産工場ではショット屑が毎日７０
〜９０トン発生する。更に建築現場で発生するロックウ
ール断熱材の切り屑や建築解体現場で発生するロックウ
ール断熱材の廃材、また、ロックウールを主原料とする
ロックウール製品の切り屑や廃材等の再利用は業界とし
ての大きな課題であり、従来、有効に利用する方法がな
かったこれらの産廃物を焼成することによって、溶融欠
点を除去しながら有効な原料として、ロックウールの基
本組成を乱さない範囲で再利用することが可能となっ
た。また、水砕スラグなど金属鉄や硫黄を包含する原料
をショット屑などの産廃物に一部混ぜて焼成することに
よって、金属鉄を酸化、硫黄をガスとして放出した後、
生成する塊状焼成物を圧壊・粉砕して電気炉に投入、溶
融し、繊維化して高強度ロックウールを製造することも
できる。Shot debris generated in the rock wool manufacturing process is 15 to 20% of the total amount of melt, and 70 debris is shot every day at an average rock wool production plant of 450 tons per day.
~ 90 tons are generated. In addition, scraps of rockwool insulation materials generated at construction sites and waste materials of rockwool insulation materials generated at construction dismantling sites, as well as chips and waste materials of rockwool products that are mainly made of rockwool, are reused by industry. By burning these industrial wastes, for which there was no method to use them effectively, it can be reused as an effective raw material while removing melting defects as long as it does not disturb the basic composition of rock wool. It became possible to do. In addition, by partially mixing raw materials containing metallic iron and sulfur such as granulated slag with industrial waste such as shot waste, and oxidizing the metallic iron, releasing sulfur as gas,
It is also possible to produce a high-strength rockwool by crushing and crushing the resulting lumpy fired product, charging it into an electric furnace, melting it, and fibrating it.
【００１１】[0011]
【作用】本発明の高強度ロックウールの製造方法はロッ
クウールのショット屑等の産廃物を主体とする原料を予
めロータリーキルン等で塊状の焼成物とした後水冷式圧
延ロール等の装置にて圧壊・粉砕し、細かい粒状とする
ので、電気炉に投入された細かい粒状物は内部まで熱が
容易に伝わり、金属鉄等は酸化溶融され、硫黄はガスと
して放出される。また電気炉に投入される原料が細かい
ので電気炉のモリブテン電極や水冷ホルダーに万一当た
っても損傷を与えたり、湯面上に落下した時の衝撃で湯
面が動揺して湯面制御を乱すことはなく、均質な溶湯が
得られる。その結果高強度のロックウールを得ることが
できる。In the method for producing high-strength rock wool of the present invention, a raw material mainly composed of industrial waste such as rock wool shot waste is made into a lump-shaped fired product in advance by a rotary kiln or the like and then crushed by a device such as a water-cooled rolling roll. -Since it is crushed into fine particles, the fine particles charged into the electric furnace easily transfer heat to the inside, and metallic iron and the like are oxidized and melted, and sulfur is released as gas. Also, since the raw material that is put into the electric furnace is fine, even if it hits the molybdenum electrode of the electric furnace or the water-cooled holder, it will be damaged, or the impact when it falls on the surface of the water will shake the surface of the water and control the surface of the water. A homogeneous molten metal can be obtained without being disturbed. As a result, high-strength rock wool can be obtained.
【００１２】[0012]
［実施例１］内径４００ｍｍ、長さ４０００ｍｍ、３／
１００の傾斜、２．５〜５ｒｐｍの回転速度を有するロ
ータリーキルンに２００ｋｇ／時間の割合でショット屑
を投入し、最高温度１２００℃、投入から排出されるま
での時間２０分で焼成した。廃ガス中の酸素濃度は２．
５％、二酸化炭素の濃度は１１．７％であった。焼成し
た塊状の焼成物を直径４００ｍｍの対の水冷式圧延ロー
ルの間隔を４０ｍｍにして圧壊・粉砕して、次の粒度分
布の粒状焼成物を得た。なお、粒状焼成物の形状は必ず
しも球状ではないので、平均径を測定し算出した。表１
に示す。[Example 1] 400 mm inner diameter, 4000 mm length, 3 /
Shot waste was charged into a rotary kiln having an inclination of 100 and a rotation speed of 2.5 to 5 rpm at a rate of 200 kg / hour, and the shot waste was fired at a maximum temperature of 1200 ° C and a time of 20 minutes from the charging to discharging. The oxygen concentration in the waste gas is 2.
The concentration of carbon dioxide was 5% and the concentration of carbon dioxide was 11.7%. The fired massive fired product was crushed and crushed with a water-cooled rolling roll pair having a diameter of 400 mm at an interval of 40 mm to obtain a granular fired product having the following particle size distribution. Since the shape of the granular burned material is not necessarily spherical, the average diameter was measured and calculated. Table 1
Shown in
【００１３】[0013]
【表１】 [Table 1]
【００１４】この粒状の焼成物を電気炉に落とし、溶湯
の温度を１４７０℃に保持しながら、炉内の滞留時間を
１５分、３０分、６０分として、湯口から排出し、高温
回転体で繊維化し、平均繊維径４μｍの本発明の高強度
ロックウールを得た。該繊維の単繊維の引張り強度を測
定し表２に示す。なお比較のため従来のキュポラの溶湯
に基づくロックウールの単繊維の引張り強度を比較例と
して表２に示す。This granular fired product was dropped into an electric furnace, and while keeping the temperature of the molten metal at 1470 ° C., the residence time in the furnace was set to 15, 30, and 60 minutes, and the material was discharged from the sprue and used as a high temperature rotor. Fiberization was performed to obtain the high-strength rockwool of the present invention having an average fiber diameter of 4 μm. The tensile strength of the single fiber of the fiber was measured and is shown in Table 2. For comparison, the tensile strength of rock wool monofilament based on the conventional cupola melt is shown in Table 2 as a comparative example.
【００１５】[0015]
【表２】 [Table 2]
【００１６】［実施例２］実施例１と同じ装置を用い
て、ショット屑８０％、水砕スラグ２０％の原料を投入
し焼成し、焼成塊状物を圧壊・粉砕して、粒状焼成物を
造り、電気炉で溶融し、溶湯を高速回転体で繊維化し
た。粒状物の粒度分布、単繊維の引張り強度とも、実施
例１とほぼ類似の結果を得、品質上、何等問題はなかっ
た。[Example 2] Using the same apparatus as in Example 1, a raw material of shot waste 80% and water granulated slag 20% is charged and fired, and the fired lump is crushed and crushed to obtain a granular fired product. It was made, melted in an electric furnace, and the molten metal was made into fibers by a high-speed rotating body. With regard to the particle size distribution of the granular material and the tensile strength of the single fiber, almost the same results as in Example 1 were obtained, and there was no problem in terms of quality.
【００１７】［実施例３］実施例１と同じ装置を用い
て、ショット屑７０％、水砕スラグ１５％、汚泥焼却灰
５％、ロックウールを使用した天井材の廃材１０％を混
合・投入し、焼成塊状物を圧壊・粉砕して、粒状焼成物
を造り、電気炉で溶融し、溶湯を高速回転体で繊維化し
た。粒状物の粒度分布、単繊維の引張り強度とも、実施
例１とほぼ類似の結果を得、品質上、何等問題はなかっ
た。[Embodiment 3] Using the same apparatus as in Embodiment 1, 70% of shot waste, 15% of water granulated slag, 5% of sludge incinerated ash, and 10% of waste ceiling material using rock wool are mixed and added. Then, the fired lump was crushed and crushed to make a granular fired product, which was melted in an electric furnace and the molten metal was made into fibers by a high-speed rotating body. With regard to the particle size distribution of the granular material and the tensile strength of the single fiber, almost the same results as in Example 1 were obtained, and there was no problem in terms of quality.
【００１８】[0018]
【発明の効果】ロックウール製造工程で発生するショッ
ト屑等の産廃物のロックウール原料としての再利用が課
題となっている。これらショット屑等の産廃物中には金
属鉄、リン化鉄、硫化鉄、炭素、硫黄等の不純物及び気
泡、筋等の溶融欠点が包含されており、これら溶融欠点
の存在がロックウールの強度が低く、脆く折れやすく、
柔軟性がないことの主因となっている。これらの溶融欠
点を包含するショット屑等を、焼成による酸化処理をせ
ずに原料として再利用するか、または焼成して塊状化し
た原料をキュポラ等還元性溶融状態下で再利用すれば溶
融欠点が再現され、ロックウールの強度などの物性は改
善されない。本発明のショット屑等の産廃物を主体とす
る原料を酸化雰囲気下で焼成してなる塊状の焼成物を圧
延ロール等で圧壊・粉砕して粒状の焼成物とした後、電
気炉に投入して溶融し、繊維化する方法を取ることによ
って、ショット等の産廃物の溶融欠点が、ほぼ完全に解
消され、かつ電気炉の電極など設備の損傷や操業の乱れ
等の問題が解決され、高強度ロックウールの効率的な製
造が可能となる。EFFECT OF THE INVENTION Reuse of industrial waste such as shot dust generated in the rock wool manufacturing process as a raw material for rock wool has been a problem. Industrial wastes such as these shot scraps contain impurities such as metallic iron, iron phosphide, iron sulfide, carbon and sulfur and melting defects such as bubbles and streaks, and the existence of these melting defects indicates the strength of rock wool. Low, brittle and easy to break,
This is the main reason for the lack of flexibility. If shot scraps containing these melting defects are reused as a raw material without oxidation treatment by firing, or if the raw material calcinated and agglomerated is reused in a reductive melting state such as cupola, melting defects Is reproduced, and physical properties such as strength of rock wool are not improved. A lump-shaped calcinated product obtained by calcination of a raw material mainly composed of industrial waste such as shot waste of the present invention in an oxidizing atmosphere is crushed and crushed by a rolling roll or the like to give a granular calcinated product, which is then put into an electric furnace. By adopting the method of melting and fibrating by melting, the melting defects of industrial waste such as shots are almost completely eliminated, and problems such as damage to equipment such as electrodes of electric furnaces and disruption of operation are solved. It enables efficient production of strong rock wool.
【図１】本発明に係わる方法を実施するのに用いられる
装置の一例のフローシート。FIG. 1 is a flow sheet of an example of an apparatus used to carry out a method according to the present invention.
１：ロータリーキルン ２：耐火物 ３：ガスないし重油バーナー ４：原料 ５：投入口 ６：塊状焼成物 ７：水冷式圧延ロール ８：粒状焼成物 ９：電気炉 １０：山状に堆積した粒状焼成物 １１：炉壁 １２：炉蓋 １３：モリブテン電極 １４：水冷式ホルダー １５：溶湯 １６：溶湯出口 １７：前炉 １８：出湯 １９：高速回転体 ２０：高強度ロックウール 1: Rotary kiln 2: Refractory material 3: Gas or heavy oil burner 4: Raw material 5: Input port 6: Bulk fired product 7: Water-cooled rolling rolls 8: Granular fired product 9: Electric furnace 10: Mountain-shaped granular fired product 11: Furnace wall 12: Furnace lid 13: Molybden electrode 14: Water-cooled holder 15: Molten metal 16: Molten metal outlet 17: Front furnace 18: Hot water 19: High-speed rotor 20: High-strength rock wool
Claims (3)
主体とする原料を酸化性雰囲気化で焼成してなる塊状の
焼成物を直ちに電気炉に投入、溶融し、高速回転体で繊
維化するロックウール製造方法において、塊状の焼成物
を水冷式圧延ロール等の装置にて圧壊・粉砕し、粒状と
した後電気炉に投入することを特徴とする高強度ロック
ウールの製造方法。1. A massive fired product obtained by firing a raw material mainly containing industrial waste such as shot waste of rock wool in an oxidizing atmosphere is immediately put into an electric furnace, melted, and made into fibers by a high-speed rotating body. A method for producing high-strength rock wool, which comprises crushing and crushing a lump-shaped fired product with a device such as a water-cooled rolling roll into granules, and charging the mixture into an electric furnace.
物の大きさが、実質４０ｍｍ以下の粒状であることを特
徴とする請求項１記載の高強度ロックウールの製造方
法。2. The method for producing high-strength rockwool according to claim 1, wherein the size of the granular burned material obtained by crushing and crushing the lump is substantially 40 mm or less.
ロックウール屑、ロックウールを主原料とするロックウ
ール製品の廃材及び水砕スラグである請求項２記載の高
強度ロックウールの製造方法。3. Industrial waste such as shot waste is shot waste,
The method for producing high-strength rockwool according to claim 2, which is rockwool scrap, waste rockwool product mainly made of rockwool, and granulated slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11763095A JP3173322B2 (en) | 1995-04-20 | 1995-04-20 | Manufacturing method of high strength rock wool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11763095A JP3173322B2 (en) | 1995-04-20 | 1995-04-20 | Manufacturing method of high strength rock wool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08290934A true JPH08290934A (en) | 1996-11-05 |
| JP3173322B2 JP3173322B2 (en) | 2001-06-04 |
Family
ID=14716481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11763095A Expired - Fee Related JP3173322B2 (en) | 1995-04-20 | 1995-04-20 | Manufacturing method of high strength rock wool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3173322B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1867608A1 (en) * | 2006-06-13 | 2007-12-19 | Johns Manville | Method for preparing a pre-reacted clinker for the formation of glass and glass fibers |
-
1995
- 1995-04-20 JP JP11763095A patent/JP3173322B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1867608A1 (en) * | 2006-06-13 | 2007-12-19 | Johns Manville | Method for preparing a pre-reacted clinker for the formation of glass and glass fibers |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3173322B2 (en) | 2001-06-04 |
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