JP4106490B2 - Method for producing filler for compound material from raw consludge - Google Patents
Method for producing filler for compound material from raw consludge Download PDFInfo
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- JP4106490B2 JP4106490B2 JP2003302042A JP2003302042A JP4106490B2 JP 4106490 B2 JP4106490 B2 JP 4106490B2 JP 2003302042 A JP2003302042 A JP 2003302042A JP 2003302042 A JP2003302042 A JP 2003302042A JP 4106490 B2 JP4106490 B2 JP 4106490B2
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- 239000000945 filler Substances 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 title description 19
- 150000001875 compounds Chemical class 0.000 title description 5
- 239000004567 concrete Substances 0.000 claims description 25
- 239000002131 composite material Substances 0.000 claims description 12
- 239000003610 charcoal Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 description 6
- 239000010426 asphalt Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Description
本発明は、生コンの処理に関し、詳しくは、生コンの再生利用として生コンスラッジから合材用フィラーを製造する方法に関するものである。The present invention relates to the treatment of raw kon, and more particularly, to a method for producing a filler for raw material mix from raw corn sludge for recycling raw kon .
従来、生コンスラッジは、産業廃棄物として処分場に持ち込まれていた。一般に、コンクリートミキサー車で建設現場、土木工事現場に運ばれ、現場打設されたコンクリートの余剰分は、骨材回収設備で砕石と砂とが回収され、その残渣として生コンスラッジが発生する。
こうした生コンスラッジは、フィルタープレスによる脱水若しくは自然乾燥を経た後に産業廃棄物として処分されることになる。Conventionally, raw consludge has been brought to a disposal site as industrial waste. In general, the surplus of concrete that is transported to a construction site and civil engineering site by a concrete mixer truck, and crushed stone and sand is recovered by an aggregate recovery facility, and raw consludge is generated as a residue.
Such raw consludge is disposed as industrial waste after dehydration by filter press or natural drying.
このように生コンスラッジをフィルタープレス処理や乾燥処理を経て産業廃棄物として廃棄処分（埋め立て等）とするのは非常にコストがかかると共に産業資源の損失でもある。
そこで、本発明者は、生コンスラッジに含有される炭カル（炭酸カルシウム）に着目し、これを活かした再利用方法がないものかと研究を行なった。In this way, it is very costly and a loss of industrial resources to dispose of raw consludge as industrial waste through filter press processing and drying processing (landfill etc.).
Then, this inventor paid attention to the charcoal (calcium carbonate) contained in raw consludge, and researched whether there was a reuse method using this.
本発明者が着目したのは、合材フィラーである。本来、アスファルトに用いられる合材用フィラーは、セメント用材、鉄鋼用材、或いは排煙脱硫用材等と共に石灰石から精製されるものであり、アスファルトのピッチとの相性故にその炭カルが利用されているものである。 The inventor has focused on a composite filler. Originally, the filler for composite materials used in asphalt is refined from limestone together with cement material, steel material, flue gas desulfurization material, etc., and its charcoal is used because of its compatibility with asphalt pitch It is.
そこで、従来の生コンスラッジ（骨材回収設備で砕石と砂とを回収したもの）を分析したところ、含有されるＣａＯ分が、平均して重量比で５０％以上含まれていることが解り、これを所要の粒度とすればアスファルトの合材用フィラーとして利用可能であることが解った。
尤も、炭カルの量が不十分であれば、付加してやる必要がある。Therefore, when analyzing the conventional raw consludge (recovered crushed stone and sand in the aggregate recovery equipment), it is understood that the CaO content contained is 50% or more by weight on average, It was found that if this is the required particle size, it can be used as a filler for asphalt mixture.
However, if the amount of charcoal is insufficient, it must be added.
また、充分な炭カルが存在することで、これを生コンの細骨材（５ｍｍふるいを通過するもの）の一種としての微粒材（結合材）として添加し、再利用することも可能であるので、こうした目的にも使用できる。 In addition, since there is sufficient charcoal cal, it can be added and reused as a fine particle material (binding material) as a kind of fine aggregate (thing that passes through a 5 mm sieve) of raw concrete. Can also be used for these purposes.
本発明は、産業廃棄物として処分されていた生コンスラッジ（砕石や砂等を除去したもの）を、アスファルトの合材用フィラー或いは生コン用の微粒材として再生利用することを目的とする。 It is an object of the present invention to recycle raw consludge (those from which crushed stones, sand, etc. have been removed), which have been disposed of as industrial waste, as recycled filler for asphalt or fine material for raw concrete.
本発明かかる生コンスラッジから合材用フィラーを製造する方法は、上記目的を達成するべく、生コンの余剰分を回収し、骨材回収設備で砕石と砂とを回収した残渣としての生コンスラッジの処分において、
前記生コンスラッジを天日乾燥又は強制乾燥若しくはその併用によって水分含有率を０．１％とし、その炭カルの含有量が、重量比で５０％以上のものを得、
然る後、乾燥した生コンスラッジをボールミルで粉砕し、
更に、粉砕した生コンスラッジから粒度、６００μ通過分が１００％で、１５０μ通過分が９８％で、７５μ通過分が８２％であるスラッジ粉体を分級して合材用フィラーとした、
という手段を講じたものである。In order to achieve the above object, the method for producing a filler for composite material from the raw consludge according to the present invention collects the surplus of raw cond and disposes the raw consludge as a residue obtained by recovering crushed stone and sand in an aggregate recovery facility. In
Moisture content is made 0.1% by sun drying or forced drying or a combination thereof , and the charcoal cal content is 50% or more by weight.
After that, the dried raw consludge is crushed with a ball mill ,
Furthermore, the particle size from the crushed raw consludge, the sludge powder having a 100 μm passage of 100%, a 150 μm passage of 98%, and a 75 μm passage of 82% was classified into a mixture filler.
This is a measure taken.
そして、本発明においては、前記粉砕工程に先立って、所要の石灰石が、生コンスラッジの重量比で５０％添加されるのが好ましい。In the present invention, it is preferable that 50% of the required limestone is added in a weight ratio of the ready- mixed sludge prior to the pulverization step.
また、本発明にかかる合材用フィラーは、上記の生コンスラッジから合材用フィラーを製造する方法により製造されたものである。
更に、本発明にかかる生コン用微粒材は、上記の生コンスラッジから合材用フィラーを製造する方法により製造されたものである。Moreover, the filler for compound materials concerning this invention is manufactured by the method of manufacturing the filler for compound materials from said raw consludge.
Furthermore, the fine material for raw concrete according to the present invention is produced by a method for producing a filler for composite material from the above-mentioned raw concrete sludge.
本発明において、生コンとは、一般に建設現場や土木工事現場で打設するコンクリートを言うもので、通常、セメント、骨材、細骨材等がコンクリートミキサー車で混練された状態のコンクリートを言うが、本発明においては生コン自体の構成素材を限定するものではなく、セメントが含まれる全てのコンクリートを意味する。 In the present invention, ready-mixed concrete generally refers to concrete placed at a construction site or civil engineering site, and usually refers to concrete in a state where cement, aggregate, fine aggregate, etc. are kneaded with a concrete mixer. In the present invention, the constituent material of the ready-mixed concrete itself is not limited, but means all concrete containing cement.
また、骨材回収設備とは、一般に、コンクリートミキサー車が現場から帰還した所に敷設されているもので、ここでコンクリートミキサー車の洗浄と共に打設後の余剰のコンクリートを排出し、そこから砕石、砂等を分離する装置であって、それ自体公知の構成のものであり、また、本発明自体とは直接関係がないので、その詳細説明は省く。 The aggregate recovery equipment is generally installed at the place where the concrete mixer truck returns from the site, where the concrete mixer truck is washed and the surplus concrete after laying is discharged, and then crushed stone An apparatus for separating sand and the like, which has a publicly known configuration, and is not directly related to the present invention itself, and therefore will not be described in detail.
本発明に言う生コンスラッジとは、上述した骨材回収設備を経た残渣、即ち、砕石、細骨材等を除去した後のものを言う。
こうした生コンスラッジは、フィルタープレスや自然乾燥を経ても通常水分含有率が３０％程度である。The raw consludge referred to in the present invention refers to a product after removing the residue, ie, crushed stone, fine aggregate, etc., through the above-described aggregate recovery equipment.
Such raw consludge usually has a water content of about 30% even after being subjected to filter press or natural drying.
本発明にいう強制乾燥とは、円筒状の回転ドライヤー、ラピットドライヤー、或いは移動格子ドライヤーのような手段も含まれ、更に、単に脱水を行なうフィルタープレスや遠心分離機も含まれる。要するに、水分含有率が０．１％になるように乾燥させる。The forced drying referred to in the present invention includes means such as a cylindrical rotary dryer, rapid dryer, or moving grid dryer, and further includes a filter press and a centrifugal separator that simply perform dehydration. In short, it is dried so that the moisture content is 0.1% .
そして、粉砕については、一般に使用されている粉砕機が用いられるが、所要の粒度、２００〜３２５メッシュ程度の粉砕が可能であれば、適宜の手段を用いてよい。
また、分級については、通常の振動篩や、風選、重力沈降（サイクロン）等、適宜の分級手段を用いてよい。そして、合材用フィラーとしては、２００〜３２５メッシュ程度のものを用いるのが好ましいが、生コン用の微粒材としては、２００〜２５０メッシュ程度のものを用いるのが良い。For the pulverization, a generally used pulverizer is used, and any appropriate means may be used as long as the required particle size and pulverization of about 200 to 325 mesh are possible.
As for classification, an appropriate classification means such as a normal vibration sieve, wind selection, gravity sedimentation (cyclone), or the like may be used. And as a filler for compound materials, it is preferable to use a thing of about 200-325 mesh, but it is good to use a thing of about 200-250 mesh as a fine particle material for ready-mixed concrete.
以下、本発明にかかる生コンスラッジから合材用フィラーを製造する方法と該方法により製造された合材用フィラーと生コン用微粒材の好適実施例について詳述する。
先ず、コンクリートミキサー車から回収したコンクリートの余剰分を、骨材回収設備に通して砕石、砂等の細骨材を分離除去して生コンスラッジを得た。
そして、この生コンスラッジのＣａＯ分の含有量を検出した。その結果、炭カルの含有量は、重量比で５０％以上であった。Hereinafter, a preferred embodiment of a method for producing a filler for composite material from the raw consludge according to the present invention, and a filler for composite material produced by the method and a fine material for raw concrete will be described in detail.
First, surplus concrete recovered from the concrete mixer truck was passed through an aggregate recovery facility to separate and remove fine aggregates such as crushed stone and sand to obtain raw consludge.
And the content of CaO content of this raw consludge was detected. As a result, the content of charcoal cal was 50% or more by weight.
この生コンスラッジを、フィルタープレスによって脱水し、自然乾燥させて３Ｋｇの生コンスラッジを得た。この生コンスラッジの水分含有率を検出したところ、約３０％であった。
この生コンスラッジを破砕し、熱風乾燥により乾燥させ、各々、水分含有率が約０．１％（資料−１）、約０．５％（試料−２）、約１％（試料−３）以下に抑えたものを得た。This raw consludge was dehydrated by a filter press and naturally dried to obtain 3 kg of raw consludge. When the water content of this raw consludge was detected, it was about 30%.
This raw consludge is crushed and dried by hot air drying, and the water content is about 0.1% (sample-1), about 0.5% (sample-2), about 1% (sample-3) or less, respectively. I got something that was suppressed.
しかる後に、試料１を、粉砕機（例えば、ボールミル）に投入し、夫々データを摂ったものを、図１の別表−１（フィラーの粒度構成表）示す。
このことから、試料−１のように、水分含有率を低く抑えたものが、その粉砕が細かなものとなることが解った。これは、残留水分が減少したことにより造粒作用が生じないためであると推測される。
しかし、何れの試料−１〜３についても、合材用フィラーとしてのＪＩＳ規格をクリアーしているものであり、また、炭カルの含有量も充分であるので、これを合材用フィラーとして利用できるものであった。Thereafter,
From this, it was found that the pulverization was fine when the moisture content was kept low as in Sample-1. This is presumed to be because granulation does not occur due to a decrease in residual moisture.
However, any of
また、この試料−１を生コン用の微粒材（細骨材の一種としての結合材として）として、生コンに添加して使用したところ、砂等の細骨材としてのみならず、セメントとしての結合力を発揮して、コンクリートの強度アップに寄与できるものであった。 Moreover, when this sample-1 was used as a fine material for raw concrete (as a binder as a kind of fine aggregate) and added to raw concrete, it was used not only as a fine aggregate such as sand but also as cement. It exerted its strength and contributed to the improvement of concrete strength.
次いで、上記生コンスラッジの乾燥工程の後に、石灰石を添加する工程を付加した。
ここでは、生コンの余剰分をミキサー車から洗浄とともに排出させ、骨材回収設備で砕石や細骨材を除去した際に失われるセメント分、即ち炭カルを補充するためである。尤も、炭カルのチェックによって充分な含有量が認められれば、その必要はない。Next, a step of adding limestone was added after the drying step of the raw consludge.
This is because the surplus of raw concrete is discharged from the mixer truck together with washing, and the cement lost when the crushed stone and fine aggregate are removed by the aggregate recovery facility, that is, charcoal cal is replenished. However, if a sufficient content is recognized by checking the charcoal cal, it is not necessary.
ここでは、乾燥させた生コンスラッジ３ｋｇに対して、１．５ｋｇ（重量比で５０％）の石灰石を添加し、全体の水分含有率を０．１％に乾燥、調整し、その後、粉砕機（例えば、ボールミル）に投入して粉砕を行なった。粉砕の粒度は、上記の別表−１と同様の結果であった。
この石灰石の添加によって、アスファルトの合材用フィラーとしても、また、生コン用の微粒材（結合材）としても、充分に機能を発揮させることが出来た。Here, 1.5 kg (50% by weight) of limestone is added to 3 kg of dried raw consludge, and the total moisture content is dried and adjusted to 0.1%. For example, it was put into a ball mill and pulverized. The particle size of the pulverization was the same result as in
By the addition of this limestone, the function could be sufficiently exerted as a filler for asphalt mixture and as a fine particle material (binding material) for ready-mixed concrete.
本発明によれば、生コンスラッジの乾燥において基準値よりも約１０倍強く乾燥させて水分含有率を０．１％とすることで、その粉砕処理（通常一般のボールミルで）において微粉化を図ることができて、合材用フィラーとして求められる粒度を大幅にクリアーする微粒材を得る事が出来たのであり、従来廃棄処分していた生コンスラッジを合材用フィラーとして、或いは生コン用の微粒材として再生利用することができて、処分コストの低減のみならず、資源のリサイクルを成し得る事が出来る顕著な効果を奏するに至ったものである。
本発明にかかるその他の具体的な効果については、上記発明の実施の態様の項及び実施例の項において詳述した通りである。According to the present invention, when the raw consludge is dried, it is dried about 10 times stronger than the reference value, and the water content is set to 0.1%, so that the pulverization process (usually with a general ball mill) is pulverized. It was possible to obtain a fine particle material that greatly cleared the particle size required as a filler for composite materials. As a result, it is possible to recycle and recycle resources, and not only the disposal cost can be reduced, but also the resource can be recycled.
Other specific effects according to the present invention are as described in detail in the section of the embodiment of the present invention and the section of the examples.
Claims (2)
前記生コンスラッジを天日乾燥又は強制乾燥若しくはその併用によって水分含有率を０．１％とし、その炭カルの含有量が、重量比で５０％以上のものを得、
然る後、乾燥した生コンスラッジをボールミルで粉砕し、
更に、粉砕した生コンスラッジから粒度が、６００μ通過分が１００％で、１５０μ通過分が９８％で、７５μ通過分が８２％であるスラッジ粉体を分級して合材用フィラーとした、
生コンスラッジから合材用フィラーを製造する方法。In the disposal of ready-mixed sludge as a residue that recovered surplus of ready-mixed concrete and recovered crushed stone and sand with aggregate recovery equipment,
Moisture content is made 0.1% by sun drying or forced drying or a combination thereof, and the charcoal cal content is 50% or more by weight.
After that, the dried raw consludge is crushed with a ball mill ,
Furthermore, from the pulverized raw consludge, the sludge powder having a particle size of 100% passing through 600μ, 98% passing through 150μ, and 82% passing through 75μ was classified into a filler for composite material.
A method for producing fillers for composite materials from raw consludge.
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