JPS5933546B2 - Method for manufacturing crystallized aggregate using sewage sludge residue as raw material - Google Patents
Method for manufacturing crystallized aggregate using sewage sludge residue as raw materialInfo
- Publication number
- JPS5933546B2 JPS5933546B2 JP54129452A JP12945279A JPS5933546B2 JP S5933546 B2 JPS5933546 B2 JP S5933546B2 JP 54129452 A JP54129452 A JP 54129452A JP 12945279 A JP12945279 A JP 12945279A JP S5933546 B2 JPS5933546 B2 JP S5933546B2
- Authority
- JP
- Japan
- Prior art keywords
- sewage sludge
- aggregate
- temperature
- sludge residue
- range
- 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
- 239000010801 sewage sludge Substances 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000002994 raw material Substances 0.000 title claims description 4
- 238000000034 method Methods 0.000 title description 6
- 239000000203 mixture Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 6
- 239000012768 molten material Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 14
- 239000000155 melt Substances 0.000 description 8
- 229910052681 coesite Inorganic materials 0.000 description 7
- 229910052906 cristobalite Inorganic materials 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 229910052682 stishovite Inorganic materials 0.000 description 7
- 229910052905 tridymite Inorganic materials 0.000 description 7
- 238000011282 treatment Methods 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 241000975357 Salangichthys microdon Species 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Glass Compositions (AREA)
Description
【発明の詳細な説明】
本発明は、各地の下水処理場より発生する下水汚泥残渣
を原料とする結晶化骨材の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing crystallized aggregate using sewage sludge residue generated from sewage treatment plants in various places as a raw material.
従来、各地の下水処理場より発生する下水汚泥は、＝部
が生汚泥のまま埋立投棄されているものもあるが、衛生
上あるいは悪臭公害上問題があるので、大部分は焼却処
理され焼却灰として埋立投棄がなされている。Traditionally, some of the sewage sludge generated from sewage treatment plants in various places has been dumped in landfills as raw sludge, but since this poses hygiene and odor pollution problems, most of it has been incinerated and turned into incinerated ash. As a result, they are dumped in landfills.
しかしながら、埋立用地の確保が難かしくなってきたと
ともに焼却処理にともなう二次公害が大きな社会問題化
し、さらに省資源、省エネルギーの観点より下水汚泥の
処理法が再検討されている。However, as it has become difficult to secure land for landfill, secondary pollution associated with incineration has become a major social problem, and sewage sludge treatment methods are being reconsidered from the perspective of resource and energy conservation.
本発明（ｉ、このような観点より、従来埋立投棄がなさ
れていた下水汚泥、下水汚泥焼却灰あるいは下水汚泥乾
留法等の下水汚泥残渣を原料として高強度の結晶化骨材
を製造する方法を提供するものであり、主たる化学組成
が５ｉＯ２１８〜４５重量％（以下単に％と記す）、Ａ
ｌ２０３１〜１５％、Ｆｅ２０３１〜３５％、Ｃａ０１
３〜４５％の範囲内でかつＣａＯ／ＳｉＯ２の比が０．
６〜１．３に調整された下水汚泥残渣を、熔融炉中にて
熔融した後、８５０〜９５０℃の温度範囲内に１５分間
以上保持して結晶核を形成し、しかる後核形成物を１０
５０〜１２００℃の温度範囲内に２０分以上５時間以下
保持して熔融物を結晶化する下水汚泥残渣を原料とする
結晶化骨材の製造法である。The present invention (i.) From this perspective, we have developed a method for producing high-strength crystallized aggregate using sewage sludge, sewage sludge incineration ash, or sewage sludge residue such as sewage sludge carbonization method, which has conventionally been disposed of in landfills. The main chemical composition is 5iO218-45% by weight (hereinafter simply referred to as %), A
l2031~15%, Fe2031~35%, Ca01
Within the range of 3 to 45% and the CaO/SiO2 ratio is 0.
After melting the sewage sludge residue adjusted to 6 to 1.3 in a melting furnace, it is held at a temperature of 850 to 950°C for 15 minutes or more to form crystal nuclei, and then the nucleated material is 10
This is a method for producing crystallized aggregate using sewage sludge residue as a raw material, in which the melt is crystallized by holding it in a temperature range of 50 to 1200° C. for 20 minutes or more and 5 hours or less.
すなわち、本発明は、特定組成範囲に調整された下水汚
泥残渣を特定の加熱処理条件で処理することの相乗効果
により機械的強度および耐薬品性に優れた骨材を製造す
る方法を見出したものである。That is, the present invention has discovered a method for producing aggregate with excellent mechanical strength and chemical resistance through the synergistic effect of treating sewage sludge residue adjusted to a specific composition range under specific heat treatment conditions. It is.
本発明の更に詳しい構成を説明すれば、下水処理場より
発生する下水汚泥、該下水汚泥を焼却処理した焼却灰あ
るいは下水汚泥乾留処理後の乾留灰等の下水汚泥残渣中
には５ＩＯ２、Ａｌ２Ｏ３、Ｆｅ２Ｏ３、Ｐ２Ｏ５、Ｃ
ａｂ、ＭｇＯ，に２０、Ｎａ２Ｏ等が主に含まれており
、それらの含有量は季節および場所等により異なるもの
である。To explain the more detailed configuration of the present invention, sewage sludge residue such as sewage sludge generated from a sewage treatment plant, incinerated ash obtained by incinerating the sewage sludge, or carbonized ash after sewage sludge carbonization treatment contains 5IO2, Al2O3, Fe2O3, P2O5, C
It mainly contains ab, MgO, 20, Na2O, etc., and their content varies depending on the season and location.
それらのうち、結晶化するには特定の成分が所定範囲内
にあることが大切であり、具体的には５ｉ０２１８〜４
５％好ましくは３０〜３５％、Ａ１２０３１〜１５％好
ましくは５〜１０％、Ｆｅ２０３１〜３５％好ましくは
１５〜２０％、ＣａＯ１３〜４５％好ましくは３０〜３
５％の範囲内でがつＣａＯ／ＳｉＯ２の比が０．６〜１
．３好ましくは０．８〜１．１の範囲内であることが重
要であるので、前記下水汚泥残渣を分析し、組成範囲が
前記特定組成範囲内にないときは、前述の組成範囲に入
るように調整する。Among them, it is important that specific components be within a predetermined range in order to crystallize, and specifically, 5i0218 to 4
5% preferably 30-35%, A12031-15% preferably 5-10%, Fe2031-35% preferably 15-20%, CaO13-45% preferably 30-3
The ratio of CaO/SiO2 within the range of 5% is 0.6 to 1
．． 3 It is important that the composition is preferably within the range of 0.8 to 1.1, so analyze the sewage sludge residue, and if the composition range is not within the specific composition range, adjust the composition so that it falls within the above specific composition range. Adjust to.
なお組成調整に際しては、安価な粘土、シラス、ベンガ
ラ、石灰等を用いることが好ましい。In addition, when adjusting the composition, it is preferable to use inexpensive clay, whitebait, red iron oxide, lime, etc.
このようにして、組成調整された下水汚泥残渣を熔融炉
中にて１３００〜１６００℃程度に加熱して熔融した後
、該熔融物を例えば水中に滴下して粒状化するとともに
冷却するか、あるいは熔融物を型中に流し込んで固化し
た後、該熔融終了物を加熱炉の中に入れて８５０℃〜９
５０℃好ましくは８８０〜９２０℃の温度範囲内の所定
温度に１５分間以上、好ましくは３０分程度保持するか
、あるいは該温度範囲内をゆっくりとした昇温速度で昇
温させて、その温度範囲内に１５分間以上、好ましくは
３０分程度保持して熔融物中に結晶核を形成する。After the sewage sludge residue whose composition has been adjusted in this manner is heated to about 1,300 to 1,600°C in a melting furnace and melted, the melt is dropped into water, for example, and granulated and cooled, or After pouring the melt into a mold and solidifying it, the melted product is placed in a heating furnace and heated to 850°C to 90°C.
Either maintain the temperature at a predetermined temperature within the temperature range of 50°C, preferably 880 to 920°C, for 15 minutes or more, preferably about 30 minutes, or increase the temperature within the temperature range at a slow rate. The melt is held for at least 15 minutes, preferably about 30 minutes, to form crystal nuclei in the melt.
次いで結晶核を形成した核形成物を１０５０〜１２００
℃好ましくは１１００〜１１５０℃の温度範囲内の所定
温度に２０分以上、好ましくは１時間程度保持するか、
あるいは該温度範囲内をゆっくりとした昇温速度で昇温
させて、その温度範囲内に２０分間以上、好ましくは１
時間程度保持して熔融物を結晶化する骨材の製造法であ
る。Next, the nucleation material that formed crystal nuclei was heated to 1050 to 1200
℃ Preferably held at a predetermined temperature within the temperature range of 1100 to 1150℃ for 20 minutes or more, preferably about 1 hour, or
Alternatively, the temperature is raised within the temperature range at a slow rate, and the temperature is kept within the temperature range for 20 minutes or more, preferably 1 hour.
This is an aggregate production method in which the molten material is crystallized by holding it for about a period of time.
なお、８５０〜９５０℃の温度範囲内の一次熱処理に際
しては、１３００〜１６００℃での熔融物を冷却過程に
おいて冷却条件を制御することにより該温度範囲内に所
定時間保持するのが、熱エネルギーの有効利用の点より
最も良い方法であり、さらに１０５０〜１２００℃での
いわゆる二次熱処理は、前述の一次熱処理後冷却するこ
となく引続いて熱処理するのが最も良い方法である。In addition, during primary heat treatment within the temperature range of 850 to 950°C, it is important to maintain the melt at 1300 to 1600°C within the temperature range for a predetermined time by controlling the cooling conditions during the cooling process. This is the best method from the point of view of effective utilization, and the best method is to carry out the so-called secondary heat treatment at 1050 to 1200° C. without cooling after the above-mentioned first heat treatment.
また、熱処理に際してはそれぞれの特定温度範囲内の一
定温度に所定時間保持するのが均一な結晶核の生成およ
び結晶化により好ましいものではあるが、前述のとおり
それぞれの特定温度範囲内を所定時間かけてゆっくりと
昇温してもほぼ同等の効果が得られるのである。In addition, during heat treatment, it is preferable to hold the temperature at a constant temperature within each specific temperature range for a predetermined time in order to generate uniform crystal nuclei and crystallize. Almost the same effect can be obtained even if the temperature is increased slowly.
そして、所望する粒度の骨材を得るには結晶化物を破砕
し篩分すればよいのである。In order to obtain aggregate with the desired particle size, the crystallized material may be crushed and sieved.
次に本発明の主たる化学組成のうちＳｉＯ２が１８〜４
５％とするのは、ＳｉＯ２が１８％未満では骨材として
のＳｉＯ２が不足して強度の強い骨材が得られないから
であり、また４５％を越えると結晶化に悪影響を及ぼす
ので好ましくない。Next, among the main chemical compositions of the present invention, SiO2 is 18 to 4
The reason for setting the SiO2 content to 5% is that if the SiO2 content is less than 18%, there will be insufficient SiO2 as aggregate, making it impossible to obtain a strong aggregate, and if it exceeds 45%, it will have a negative effect on crystallization, which is not preferable. .
またＡｌ２Ｏ３が１％未満では強度の強い骨材が得られ
ず、また１５％を越えると熔融温度が高くなり過ぎて好
ましくない。Further, if Al2O3 is less than 1%, a strong aggregate cannot be obtained, and if it exceeds 15%, the melting temperature becomes too high, which is not preferable.
さらにＦｅ２Ｏ３は融剤および核形成剤として作用し、
その量が１％未満ではその効果がなく、３５％を越える
と骨材の強度を著しく低下させ、かつ熔融温度を高める
ために好ましくない。Furthermore, Fe2O3 acts as a fluxing agent and a nucleating agent,
If the amount is less than 1%, there is no effect, and if it exceeds 35%, the strength of the aggregate will significantly decrease and the melting temperature will increase, which is not preferable.
またＣａＯが１３％未満では骨材の結晶化および強度に
悪影響があり、また４５％を越えると骨材の耐薬品性が
著しく低下するので好ましくない。Further, if the CaO content is less than 13%, it will have an adverse effect on the crystallization and strength of the aggregate, and if it exceeds 45%, the chemical resistance of the aggregate will be significantly reduced, which is not preferable.
なお、ＣａＯ／ＳｉＯ２の比が０．６〜１．．３の範囲
内にあることが熔融物の結晶化に対してより大切である
。Note that the CaO/SiO2 ratio is 0.6 to 1. ．． It is more important for the crystallization of the melt to be within the range of 3.
すなわちこの配合比が０．６未満では熱処理条件を満足
しても熔融物を結晶化することがむずかしく、また、反
対にまたこの配合比が１．３を越えると熔融温度が高く
なり過ぎかつ骨材の耐薬品性が著しく悪くなるので好ま
しくない。In other words, if this blending ratio is less than 0.6, it will be difficult to crystallize the melt even if the heat treatment conditions are satisfied, and on the other hand, if this blending ratio exceeds 1.3, the melting temperature will be too high and bones will be damaged. This is not preferable because the chemical resistance of the material will be significantly deteriorated.
また、熱処理条件として一次熱処理を８５０〜９５０°
Ｃの温度範囲内に１５分以上５時間以下保持するのは、
この温度範囲および時間を保持しないと結晶核の核形成
ができないものであり、さらに二次熱処理を１０５０〜
１２００℃の温度範囲内に２０分以上５時間以下とした
のは、この温度範囲に所要時間保持しないと結晶化を均
一にしかも完全に行なうことができず強い骨材が得られ
ないためであり、５時間以上加熱することは不必要で経
済的に引合はないからである。In addition, the heat treatment conditions include primary heat treatment at 850 to 950°.
Holding within the temperature range of C for 15 minutes or more and 5 hours or less is
Nucleation of crystal nuclei cannot occur unless this temperature range and time are maintained, and a secondary heat treatment is performed at 1050~1050℃.
The reason why the temperature is kept within the temperature range of 1200°C for 20 minutes or more and 5 hours or less is because unless the temperature is kept within this temperature range for the required time, crystallization cannot be uniformly and completely and a strong aggregate cannot be obtained. This is because heating for more than 5 hours is unnecessary and economically unsuitable.
次に本発明の実施例について述べる。Next, examples of the present invention will be described.
第１表に記載する化学組成および比率に組成調整した下
水汚泥焼却灰を耐火物製サヤ中に入れ１５５０°Ｃの電
気炉中に入れて熔融し、その熔融物を第１表に記載する
第一次および第二次の熱処理を行なって結晶化を完了さ
せた。Sewage sludge incineration ash whose composition has been adjusted to the chemical composition and ratio listed in Table 1 is placed in a refractory pod and melted in an electric furnace at 1550°C. Primary and secondary heat treatments were performed to complete crystallization.
そして得られた結晶化物を破砕篩分し、本発明による結
晶化骨材／１６１〜磨１７を得た。The obtained crystallized product was crushed and sieved to obtain crystallized aggregates/161 to 17 according to the present invention.
なお、本発明の数値限定範囲外の組成および熱処理条件
のものについても同様に実施し、第１表に参考例／Ｉ６
］８〜４３３として記載した。The compositions and heat treatment conditions outside the numerical limit range of the present invention were also tested in the same manner, and Table 1 shows Reference Example/I6.
]8-433.
これらの各種の骨材について、ＪＩＳ規格にもとづいて
比重、吸水率、圧縮強度、ロザンゼルス試験機によるす
りへり減量率、硫酸ナトリウムによる安定性試験等につ
いて比較測定した。These various aggregates were comparatively measured in terms of specific gravity, water absorption, compressive strength, abrasion loss rate using a Los Angeles tester, stability test using sodium sulfate, etc. based on JIS standards.
結果は第１表に記載するとおりである。The results are shown in Table 1.
第１表の結果より明らかなとおり、本発明の製造法によ
る結晶化骨材は、本発明の数値限定範囲外の参考例によ
る骨材に比べて機械的強度、摩耗減量率および耐薬品性
に優れていることが確認された。As is clear from the results in Table 1, the crystallized aggregate produced by the production method of the present invention has better mechanical strength, abrasion loss rate, and chemical resistance than the aggregate produced by the reference example outside the numerical limit range of the present invention. It was confirmed that it was excellent.
本発明は以上のべたとおり、特定組成範囲に調整された
下水汚泥残渣を、特定熱処理条件で熱処理することによ
り、特に機械的強度および耐薬品性に優れた結晶化骨材
を製造できる骨材の製造法であり、各地の下水処理場よ
り発生する無益な下水汚泥残渣より、最近資源不足が問
題とされているコンクリート用骨材等の各種の有益な骨
材が製造できるものであって、廃物利用による一石二鳥
の効果のある骨材の製造法であり、公害防止および産業
上極めて有用な骨材の製造法である。As described above, the present invention is an aggregate that can produce crystallized aggregate with particularly excellent mechanical strength and chemical resistance by heat-treating sewage sludge residue adjusted to a specific composition range under specific heat treatment conditions. It is a manufacturing method that can produce various useful aggregates such as aggregate for concrete, which has recently become a problem due to lack of resources, from the useless sewage sludge residue generated from sewage treatment plants in various places. This is an aggregate manufacturing method that can kill two birds with one stone by using it, and is extremely useful for pollution prevention and industrial purposes.
Claims (1)
２Ｏ３１〜１５重量％、Ｆｅ２０３１〜３５重量％、Ｃ
ａＯ３，３〜４５重量％の範囲内でがつＣａＯ／ＳｉＯ
２の比が０．６〜１．．３に調整された下水汚泥残渣を
、熔融炉中にて熔融した後、８５０〜９５０°Ｃの温度
範囲内に１５分間以上保持して結晶核を形成し、しかる
後核形成物を１０５０〜１２００℃の温度範囲内に２０
分間以上保持して熔融物を結晶化することを特徴とする
下水汚泥残渣を原料とする結晶化骨材の製造法。1 The main chemical composition is 5iO218-45% by weight, Al
2O3 1-15% by weight, Fe2031-35% by weight, C
aO3, within the range of 3 to 45% by weight CaO/SiO
The ratio of 2 is 0.6 to 1. ．． After melting the sewage sludge residue adjusted to 3.3 in a melting furnace, it is held within a temperature range of 850 to 950 °C for 15 minutes or more to form crystal nuclei, and then the nucleated product is melted at a temperature of 1050 to 1200 °C. Within the temperature range of 20℃
A method for producing crystallized aggregate using sewage sludge residue as a raw material, characterized by crystallizing a molten material by holding it for at least a minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54129452A JPS5933546B2 (en) | 1979-10-09 | 1979-10-09 | Method for manufacturing crystallized aggregate using sewage sludge residue as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54129452A JPS5933546B2 (en) | 1979-10-09 | 1979-10-09 | Method for manufacturing crystallized aggregate using sewage sludge residue as raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5654247A JPS5654247A (en) | 1981-05-14 |
| JPS5933546B2 true JPS5933546B2 (en) | 1984-08-16 |
Family
ID=15009826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54129452A Expired JPS5933546B2 (en) | 1979-10-09 | 1979-10-09 | Method for manufacturing crystallized aggregate using sewage sludge residue as raw material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5933546B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60899A (en) * | 1983-06-18 | 1985-01-05 | Ngk Insulators Ltd | Melt treating process for sludge |
| JPH0699167B2 (en) * | 1990-03-23 | 1994-12-07 | 川崎重工業株式会社 | Method for manufacturing waste molten slag |
| JP2775525B2 (en) * | 1990-12-25 | 1998-07-16 | 月島機械株式会社 | Method for producing crystallized glass |
-
1979
- 1979-10-09 JP JP54129452A patent/JPS5933546B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5654247A (en) | 1981-05-14 |
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