JPH105722A - Production of granule of stone dust - Google Patents

Production of granule of stone dust

Info

Publication number
JPH105722A
JPH105722A JP17862496A JP17862496A JPH105722A JP H105722 A JPH105722 A JP H105722A JP 17862496 A JP17862496 A JP 17862496A JP 17862496 A JP17862496 A JP 17862496A JP H105722 A JPH105722 A JP H105722A
Authority
JP
Japan
Prior art keywords
powder
particles
stone powder
mixing tank
stirring
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
Application number
JP17862496A
Other languages
Japanese (ja)
Other versions
JP3639049B2 (en
Inventor
Kenji Mori
賢治 森
Takeo Ito
武男 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOMAKI KOGYO KK
Original Assignee
KOMAKI KOGYO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KOMAKI KOGYO KK filed Critical KOMAKI KOGYO KK
Priority to JP17862496A priority Critical patent/JP3639049B2/en
Publication of JPH105722A publication Critical patent/JPH105722A/en
Application granted granted Critical
Publication of JP3639049B2 publication Critical patent/JP3639049B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Processing Of Solid Wastes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an industrially advantageous method for producing granules of stone dust reutilizable as effective resources by improving a dehydrated cake of stone dust requiring troublesome disposal as industrial waste. SOLUTION: A dehydrated cake of stone dusty and a powdery water-soluble polymer or this polymer and cement powder are fed into a stirring-mixing tank and graduated. The resultant granules are fed to a sieve and divided into plus mesh and minus mesh. The plus mesh is fed into a size regulator and the size is regulated or the plus mesh is recycled to the stirring-mixing tank. The minus mesh, together with size regulating particles and a powdery caking agent, is fed into a mixer, the fixing agent is stuck to the surface of the granules and curing is carried out.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、石粉粒状体の製造
方法に関するものであり、詳しくは、採石場、砕石場ま
たは石切場における石粉の排水処理プロセスから回収さ
れる石粉脱水ケーキを原料とし、資源として再利用を図
るのに適した石粉粒状体を製造するための工業的に有利
な方法に関するものである。
[0001] The present invention relates to a method for producing granulated stone powder, and more particularly to a method for producing a powdered stone dewatered cake recovered from a stone powder wastewater treatment process in a quarry, quarry or quarry, The present invention relates to an industrially advantageous method for producing a stone powder granule suitable for recycling as a resource.

【0002】[0002]

【従来の技術】従来、採石場において、石粉などのプレ
ス脱水ケーキは、製品の石に対して2〜3割の割合で発
生し、その絶対量は、中規模の工場の場合、一日に20
0〜300トンにも達する。上記のプレス脱水ケーキの
主体は、一般の残土と異なり、粒径が75μm以下の砂
質系の微粒子であり、雨水などで軟弱となる性質のた
め、産業廃棄物として廃棄されているのが現状である。
2. Description of the Related Art Conventionally, in a quarry, press dewatered cakes such as stone powder are generated at a rate of 20 to 30% of a product stone. 20
It reaches 0 to 300 tons. The main component of the above press dewatered cake is sand-based fine particles with a particle size of 75 μm or less, unlike general surplus soil, and because it is soft under rainwater, it is currently disposed of as industrial waste. It is.

【0003】しかしながら、プレス脱水ケーキの産業廃
棄物としての処理費用は、高く、首都圏に近い採石工場
では製品コストに対して相当の比重を占めている。一
方、地方の採石工場では、採石跡地にプレス脱水ケーキ
を埋戻しているが、埋立て跡地の使用は、制約を余儀な
くされており、その規制も年々厳しくなってきている。
[0003] However, the cost of treating press dewatered cake as industrial waste is high, and quarries near the metropolitan area occupy a considerable proportion of the product cost. On the other hand, in local quarry factories, press dewatered cake is buried in the quarry site, but the use of the landfill site is subject to restrictions and regulations are becoming stricter year by year.

【0004】また、近年においては、川砂の採取が禁止
されつつあるため、学校の校庭などには鋭利な角のある
砕石砂が使用され初め、そのため、児童の擦過傷の危険
性が問題となっている。従って、最近では砕石品を更に
研磨して丸くしている工場が稼働しつつある。ここでも
多量の石粉脱水ケーキが発生し、その処分に困っている
のが現状である。
In recent years, the collection of river sand has been banned, and crushed stone with sharp corners has begun to be used in school yards and the like, and the risk of abrasion by children has become a problem. I have. Therefore, recently, a factory for grinding and grinding crushed stone products to make them rounder has been operating. Here too, a large amount of dehydrated stone powder cake is generated, and it is currently difficult to dispose of it.

【0005】[0005]

【発明が解決しようとする課題】本発明は、上記実情に
鑑みなされたものであり、その目的は、産業廃棄物とし
て処分に困っている石粉脱水ケーキを改良し、有効な資
源として再利用し得る石粉粒状体を製造するための工業
的に有利な方法を提供することにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to improve a stone powder dewatered cake which is difficult to dispose as industrial waste and reuse it as an effective resource. It is an object of the present invention to provide an industrially advantageous method for producing the obtained stone powder granules.

【0006】[0006]

【課題を解決するための手段】すなわち、本発明の要旨
は、石粉脱水ケーキと水溶性重合体粉末または水溶性重
合体粉末とセメント粉末とを撹拌混合槽に供給して処理
することにより造粒した後、得られた粒子を篩分機に供
給して篩上粒子と篩下粒子とに分割し、次いで、篩上粒
子を粒度調整機に供給して粒度調整するか、または、上
記の撹拌混合槽に循環供給し、上記の篩下粒子および粒
度調整粒子と固化剤粉末とを混合機に供給して粒子の表
面に固化剤粉末を付着させた後、養生処理することを特
徴とする石粉粒状体の製造方法に存する。
That is, the gist of the present invention is to granulate by supplying a dewatered stone powder cake and a water-soluble polymer powder or a water-soluble polymer powder and a cement powder to a stirring and mixing tank for processing. After that, the obtained particles are supplied to a sieving machine to divide the sieved particles and the undersize particles, and then the sieved particles are supplied to a particle size adjuster to adjust the particle size, or the above-described stirring and mixing. After being circulated and supplied to the tank, the above-mentioned under-sieving particles and particle size adjusting particles and the solidifying agent powder are supplied to a mixer to adhere the solidifying agent powder to the surface of the particles, and then subjected to curing treatment. Lies in the method of body production.

【0007】[0007]

【発明の実施の形態】以下、本発明を添付図面に基づい
て詳細に説明する。図1は、本発明の製造方法の一例の
工程説明図、図2は、本発明の製造工程で好適に使用さ
れる篩分機の一例の説明図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an explanatory diagram of an example of a process of the production method of the present invention, and FIG. 2 is an explanatory diagram of an example of a sieving machine suitably used in the production process of the present invention.

【0008】本発明において、石粉脱水ケーキとして
は、特に制限されないが、代表的には、採石場、砕石場
または石切場における石粉の排水処理プロセスから回収
される石粉脱水ケーキが挙げられる。本発明により、改
良できる石粉脱水ケーキは、石質によって多少異なる
が、含水比が通常20〜60%、好ましくは25〜50
%程度の脱水ケーキである。従って、シックナー又は沈
殿池で濃縮され60%を超える高含水比のスラッジは、
予め、脱水して含水比を調整するのが好ましい。
In the present invention, the dehydrated stone powder cake is not particularly limited, but typically includes a dehydrated stone powder cake recovered from a wastewater treatment process of a stone powder in a quarry, a quarry or a quarry. The dehydrated stone powder cake which can be improved by the present invention has a water content of usually 20 to 60%, preferably 25 to 50, although it slightly varies depending on the quality of the stone.
% Of dehydrated cake. Therefore, sludge with a high water content of more than 60%, which is concentrated in a thickener or sedimentation basin,
It is preferable that the water content is adjusted in advance by dehydration.

【0009】含水比を調整する方法としては、プレス脱
水機を利用する方法の他、天日乾燥方法、セメント粉末
や乾燥した石粉などを添加混合して含水比を調整する方
法などが挙げられる。なお、含水比の少ない石粉につい
ては、適宜、水を添加して含水比を調整する。また、本
発明においては、石粉脱水ケーキへの添加物として、山
砂、粘土、高吸水性樹脂など使用し、本発明に従って得
られる石粉粒状体の物性をその使用目的によって調整す
ることも出来る。
Methods for adjusting the water content include a method using a press dehydrator, a solar drying method, and a method for adjusting the water content by adding and mixing cement powder or dried stone powder. In addition, about the stone powder with a small water content, water is added suitably and a water content is adjusted. Further, in the present invention, mountain sand, clay, superabsorbent resin and the like are used as additives to the dehydrated stone powder cake, and the physical properties of the stone powder granules obtained according to the present invention can be adjusted according to the purpose of use.

【0010】本発明において、水溶性重合体粉末として
は、石粉の造粒機能を有する一般的な水溶性重合体粉末
が制限なく使用されるが、カルボキシル基含有重合体粉
末が好適に使用される。カルボキシル基含有重合体とし
ては、例えば、アラビアガム、カラヤガム、トラガント
ガム、アルギン酸塩類などの天然の酸性多糖類、カルボ
キシメチルセルロース、カルボキシメチルハイドロキシ
エチルセルロース等の半合成の水溶性高分子物質、グア
ーガム、ローカストビーンガム等の中性多糖類の変性
物、ポリアクリル酸塩類などの合成水溶性高分子物質が
例示されるが、これらの中では、合成水溶性重合体が好
適である。
In the present invention, as the water-soluble polymer powder, a general water-soluble polymer powder having a function of granulating stone powder is used without any limitation, and a carboxyl group-containing polymer powder is preferably used. . As the carboxyl group-containing polymer, for example, natural acidic polysaccharides such as gum arabic, karaya gum, tragacanth gum, alginates, carboxymethylcellulose, semi-synthetic water-soluble polymer substances such as carboxymethylhydroxyethylcellulose, guar gum, locust bean gum Synthetic water-soluble polymer substances such as modified neutral polysaccharides and polyacrylates are exemplified. Of these, synthetic water-soluble polymers are preferable.

【0011】合成水溶性重合体としては、(メタ)アク
リル酸またはその塩と(メタ)アクリルアミドとの共重
合体、マレイン酸またはその塩と酢酸ビニルとの共重合
体、イタコン酸またはその塩と(メタ)アクリルアミド
との共重合体などが挙げられるが、これらの中では、
(メタ)アクリル酸またはその塩と(メタ)アクリルア
ミドとの共重合体が好適である。
Examples of the synthetic water-soluble polymer include a copolymer of (meth) acrylic acid or a salt thereof and (meth) acrylamide, a copolymer of maleic acid or a salt thereof and vinyl acetate, and a copolymer of itaconic acid or a salt thereof. Copolymers with (meth) acrylamide and the like, among which,
A copolymer of (meth) acrylic acid or a salt thereof and (meth) acrylamide is preferred.

【0012】上記の(メタ)アクリル酸またはその塩と
(メタ)アクリルアミドとの共重合体としては、(メ
タ)アクリル酸またはその塩と(メタ)アクリルアミド
を共重合したものの他、(メタ)アクリルアミドの単独
重合体を部分加水分解したものでもよい。また、上記の
単量体を組合わせた共重合体の他、共重合可能なアクリ
ル又はビニル単量体などを一緒に共重合させたものでも
よい。
The above-mentioned copolymer of (meth) acrylic acid or a salt thereof and (meth) acrylamide includes, in addition to a copolymer of (meth) acrylic acid or a salt thereof and (meth) acrylamide, (meth) acrylamide May be obtained by partially hydrolyzing a homopolymer of the above. Further, in addition to a copolymer obtained by combining the above monomers, a copolymer obtained by copolymerizing an acrylic or vinyl monomer which can be copolymerized may be used.

【0013】合成水溶性重合体の場合、全単量体単位に
対するカルボキシル基含有単量体の割合は、通常1〜1
00モル%、好ましくは5〜60モル%の範囲とされ
る。カルボキシル基は、遊離酸または塩の何れの形で存
在していてもよい。なお、上記の水溶性重合体は、何れ
も、粉末として使用されるが、その平均粒径は、通常
0.4mm以下とされる。
In the case of a synthetic water-soluble polymer, the ratio of the carboxyl group-containing monomer to all monomer units is usually 1 to 1
The content is in the range of 00 mol%, preferably 5 to 60 mol%. The carboxyl group may be present in either the free acid or salt form. Note that any of the above water-soluble polymers is used as a powder, and the average particle size is usually 0.4 mm or less.

【0014】固化剤としては、例えば、生石灰、消石
灰、焼石膏、半水石膏、石灰系改良材などが挙げられる
が、脱水および硬化反応の速い生石灰系の粉末が好適に
使用される。通常、固化剤は、平均粒径が1mm以下の
粉末として使用される。
Examples of the solidifying agent include quick lime, slaked lime, calcined gypsum, gypsum hemihydrate, and lime-based improving materials. Of these, quick lime-based powder having a fast dehydration and hardening reaction is preferably used. Usually, the solidifying agent is used as a powder having an average particle size of 1 mm or less.

【0015】先ず、本発明においては、石粉脱水ケーキ
(A)と水溶性重合体粉末(B)とを撹拌混合槽(1)
に供給して処理することにより造粒する。この際、必要
に応じ、セメント粉末を併用することが出来る。撹拌混
合槽(1)としては、一軸または二軸式の連続式または
回分式撹拌混合槽を使用することが出来、回分式撹拌混
合槽を使用する場合は、複数基を並列に使用し、処理効
率を高めることも出来る。
First, in the present invention, a dewatered stone powder cake (A) and a water-soluble polymer powder (B) are stirred and mixed in a tank (1).
Granulate by supplying to and processing. At this time, if necessary, cement powder can be used in combination. As the stirring / mixing tank (1), a single-shaft or biaxial continuous or batch-type stirring / mixing tank can be used. When a batch-type stirring / mixing tank is used, a plurality of units are used in parallel. It can also increase efficiency.

【0016】本発明において、回分式撹拌混合槽として
は、二軸撹拌混合槽が好適に使用される。二軸撹拌混合
槽は、ケーシングの内部において、2本の回転軸が各軸
受によって平行に支持され、各回転軸には複数のアーム
が設置され、各回転軸および複数のアームには撹拌羽根
が取り付けられた構造を備えている。そして、各回転軸
は各モーターによって駆動され、各モーターはインバー
ター制御により回転速度を自由に変えることが出来る。
In the present invention, a twin-screw mixing tank is preferably used as the batch-type mixing tank. In the twin-screw mixing tank, two rotating shafts are supported in parallel by respective bearings inside the casing, a plurality of arms are installed on each rotating shaft, and a stirring blade is provided on each rotating shaft and the plurality of arms. It has an attached structure. Each rotation shaft is driven by each motor, and each motor can freely change the rotation speed by inverter control.

【0017】上記の撹拌混合槽(1)において、計量さ
れた石粉脱水ケーキ(A)は、ホッパー(11)より供
給され、水溶性重合体粉末(B)が添加された後、所定
時間処理されて造粒される。得られた石粉粒子(C)
は、排出口(12)が開放することにより、落下して排
出される。
In the stirring and mixing tank (1), the weighed dehydrated stone powder cake (A) is supplied from a hopper (11) and treated for a predetermined time after the water-soluble polymer powder (B) is added. And granulated. Obtained stone powder particles (C)
Is dropped and discharged by opening the discharge port (12).

【0018】水溶性重合体粉末(B)の添加量は、石粉
脱水ケーキ(A)の含水比により異なるため一概に決定
し得ないが、石粉脱水ケーキ(A)に対し、通常0. 0
01〜1重量%、好ましくは0. 01〜0. 5重量%と
される。撹拌混合槽(1)における滞留時間は、石粉脱
水ケーキ(A)の性質および含水比により異なるため一
概に決定し得ず、石粉脱水ケーキ(A)の造粒状態や造
粒された石粉粒子(C)の大きさ等を観察して適宜決定
する必要があるが、通常は20秒以上とするのが好まし
い。撹拌混合槽(1)における滞留時間や撹拌速度を調
整することにより、所望の粒径の石粉粒子(C)が得ら
れる。
The amount of the water-soluble polymer powder (B) to be added cannot be unconditionally determined because it differs depending on the water content of the stone powder dehydrated cake (A).
The content is 0.01 to 1% by weight, preferably 0.01 to 0.5% by weight. The residence time in the stirring and mixing tank (1) cannot be determined unconditionally because it depends on the properties and the water content of the stone powder dewatered cake (A), and the granulated state of the stone powder dehydrated cake (A) and the granulated stone powder particles ( It is necessary to determine the size appropriately by observing the size and the like of C), but it is usually preferable to set it to 20 seconds or longer. By adjusting the residence time and stirring speed in the stirring and mixing tank (1), stone powder particles (C) having a desired particle size can be obtained.

【0019】セメント粉末の使用は、本発明に従って得
られる石粉粒状体に高強度が必要とされる場合に効果的
である。すなわち、セメント粉末を含有する石粉粒子
(C)は、後述の工程でその表面に生石灰(固化剤)粉
末が付着した際に発熱する。その結果、セメント粉末の
硬化反応が促進されると共にセメント粉末と生石灰粉末
との相乗効果により、高強度の石粉粒状体が得られる。
The use of cement powder is effective when high strength is required for the stone powder granules obtained according to the present invention. That is, the stone powder particles (C) containing the cement powder generate heat when the quicklime (solidifying agent) powder adheres to the surface thereof in a step described later. As a result, a hardening reaction of the cement powder is promoted, and a high-strength stone powder granule is obtained by a synergistic effect of the cement powder and the quicklime powder.

【0020】セメント粉末は、石粉脱水ケーキ(A)に
予め添加する方法、水溶性重合体粉末(B)と共に石粉
脱水ケーキ(A)に添加する等によって使用される。セ
メント粉末の添加量は、石粉粒状体の用途によって異な
るが、石粉脱水ケーキ(A)に対し、通常20重量%以
下、好ましくは10重量%以下の範囲から適宜選択され
る。
The cement powder is used by a method in which it is previously added to the dehydrated stone powder cake (A), or by adding it to the dehydrated stone powder cake (A) together with the water-soluble polymer powder (B). The addition amount of the cement powder varies depending on the use of the stone powder granules, but is appropriately selected from the range of usually 20% by weight or less, preferably 10% by weight or less based on the stone powder dewatered cake (A).

【0021】次いで、本発明においては、撹拌混合槽
(1)から得られた粒子を篩分機(2)に供給して篩上
粒子(C1 )と篩下粒子(C2 )とに分割する。篩分機
(2)としては、図2に示す回転円筒型篩分機が好適に
使用される。この回転円筒型篩分機は、傾斜して配置さ
れ且つ金網で構成されている回転円筒体(21)から成
る。
Next, in the present invention, the particles obtained from the stirring and mixing tank (1) are supplied to a sieving machine (2) to be divided into over-sieved particles (C 1 ) and under-sieved particles (C 2 ). . As the sieving machine (2), a rotary cylindrical sieving machine shown in FIG. 2 is preferably used. The rotary cylindrical sieving machine comprises a rotary cylindrical body (21) which is arranged obliquely and is constituted by a wire mesh.

【0022】上記の篩分機(2)において、撹拌混合槽
(1)から供給される粒子(C)は、図2に示す供給口
(22)から供給され、下方側に流動しつつ篩分処理さ
れる。そして、篩上粒子(C1 )は、回転円筒体(2
1)の出口開放端の回収口(23)から排出され、篩下
粒子(C2 )は、金網にて構成された回収口(24)か
ら排出される。
In the sieving machine (2), the particles (C) supplied from the stirring and mixing tank (1) are supplied from a supply port (22) shown in FIG. 2 and sieved while flowing downward. Is done. Then, the particles on the sieve (C 1 ) are turned into a rotating cylindrical body (2
The particles are discharged from the recovery port (23) at the open end of the outlet of 1), and the under-sieved particles (C 2 ) are discharged from the recovery port (24) formed of a wire mesh.

【0023】次いで、本発明においては、篩上粒子(C
1 )を粒度調整機(3)に供給して粒度調整する。粒度
調整機(3)としては、特に制限されないが、パドル式
二軸撹拌混合機が好適に使用される。パドル式二軸撹拌
混合機は、前記の二軸撹拌混合槽の場合と同様、ケーシ
ングの内部に2本の回転軸が平行に支持され、各回転軸
には複数のアームが設置され、複数のアームには排出羽
根と切断羽根が取り付けられた構造を備えている。粒度
調整機(3)における滞留時間は、粒度調整粒子
(C3 )を効率的に得る観点から、10秒以上とするの
が好ましい。
Next, in the present invention, the sieved particles (C
1 ) is supplied to a particle size adjuster (3) to adjust the particle size. The particle size adjuster (3) is not particularly limited, but a paddle type twin-screw mixer is suitably used. As in the case of the twin-screw mixing tank described above, the paddle-type twin-screw mixer has two rotating shafts supported in parallel inside the casing, a plurality of arms mounted on each rotating shaft, and a plurality of The arm has a structure in which a discharge blade and a cutting blade are attached. The residence time in the particle size adjusting device (3) is preferably 10 seconds or more from the viewpoint of efficiently obtaining the particle size adjusting particles (C 3 ).

【0024】本発明においては、粒度調整機(3)を設
けず、篩上粒子(C1 )を前記の撹拌混合槽(1)に循
環供給してもよい。何れにしても、本発明においては、
原料の石粉脱水ケーキは全て製品とすることが出来る。
In the present invention, the sieve particles (C 1 ) may be circulated and supplied to the stirring and mixing tank (1) without providing the particle size adjusting device (3). In any case, in the present invention,
All of the raw stone flour dewatered cakes can be made into products.

【0025】次いで、本発明においては、上記の篩下粒
子(C2 )及び粒度調整粒子(C3)と固化剤粉末
(D)とを混合機(4)に供給して粒子の表面に固化剤
粉末(D)を付着させる。混合機(4)としては、粒子
の表面に固化剤粉末(D)を均一に付着できれば機種は
制限されない。例えば、高低差を利用したシュート式混
合機、円筒型混合機、スクリュー型混合機、流下式混合
機および一軸または二軸混合機などが使用できる。図1
に示した混合機(4)は、傾斜して配置された回転円筒
体から成る回転円筒型混合機である。固化剤粉末(D)
の添加量は、石粉脱水ケーキ(A)に対し、通常0. 2
〜20重量%、好ましくは0. 5〜10重量%とされ
る。
Next, in the present invention, the above-mentioned under-sieved particles (C 2 ) and the particle size adjusting particles (C 3 ) and the solidifying agent powder (D) are supplied to a mixer (4) to solidify on the surface of the particles. The agent powder (D) is applied. The type of the mixer (4) is not limited as long as the solidifying agent powder (D) can be uniformly attached to the surface of the particles. For example, a chute mixer, a cylindrical mixer, a screw mixer, a falling mixer, a single-shaft or twin-shaft mixer using a height difference can be used. FIG.
The mixer (4) shown in (1) is a rotary cylindrical mixer composed of a rotating cylindrical body arranged at an angle. Solidifying agent powder (D)
Is usually 0.2 parts with respect to the stone powder dewatered cake (A).
-20% by weight, preferably 0.5-10% by weight.

【0026】混合機(4)から回収された石粉粒状体
(E)は、必要に応じて更に篩分し、強度発現のため、
通常2〜3日、好ましくは6〜7日養生した後に使用さ
れる。上記の様にして得られた石粉粒状体は、球状で強
度が高いため、採石に混合して好適に使用することが出
来、また、地中埋設配管などの埋戻し材、校庭およびグ
ラウンド用材料として使用できる他、セメント粉末を併
用することにより一般の細骨材としての利用も期待でき
る。
The stone powder granules (E) recovered from the mixer (4) are further sieved as necessary to obtain strength.
Usually used after curing for 2-3 days, preferably 6-7 days. The stone powder granules obtained as described above are spherical and have high strength, so that they can be suitably mixed with quarries and used as backing materials such as underground pipes, school grounds and ground materials. It can be used as general fine aggregate by using cement powder together.

【0027】[0027]

【実施例】以下、実施例により、本発明を更に詳細に説
明するが、本発明は、その要旨を超えない限り、以下の
実施例に限定されるものではない。なお、以下の諸例
は、撹拌混合槽(1)として二軸撹拌混合槽、篩分機
(2)として図2に示す回転円筒型篩分機(金網の目開
き13mm)、粒度調整機(3)としてパドル式二軸撹
拌混合機、混合機(4)として回転円筒型混合機を備え
た図1に示す製造工程によって行った。また、使用した
水溶性重合体粉末は表1に示す通りである。表1中の還
元粘度は、重合体粉末を1Nの食塩水に0. 1g/dl
の濃度に溶解し、25℃の状態でオストワルド粘度計を
使用して測定した値である。
EXAMPLES Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to the following examples unless it exceeds the gist of the present invention. In the following examples, a twin-screw stirring / mixing tank was used as the stirring / mixing tank (1), a rotating cylindrical sieving machine (13 mm in mesh size) shown in FIG. 2 was used as the sieving machine (2), and a particle size adjusting machine (3) 1 was provided with a paddle type twin-screw agitator and a rotary cylindrical mixer as a mixer (4). The used water-soluble polymer powder is as shown in Table 1. The reduced viscosity in Table 1 was obtained by adding the polymer powder to a 1N saline solution at 0.1 g / dl.
And the value measured using an Ostwald viscometer at 25 ° C.

【0028】[0028]

【表1】 [Table 1]

【0029】実施例1〜6及び比較例1〜2 石粉脱水ケーキ(A)として採石場より産出した含水比
31%のプレス脱水ケーキを使用した。先ず、石粉脱水
ケーキ(A)と表2に示す各水溶性重合体粉末(B)と
を撹拌混合槽(1)に供給して表2に示す各混合時間
(滞留時間)で処理することにより粒子(C)とした
後、篩分機(2)に供給して篩上粒子(C1)と篩下粒
子(C2 )とに分割した。次いで、篩上粒子(C1 )を
粒度調整機(3)に供給して平均粒径13mm以下に粒
度調整した。そして、上記の篩下粒子(C2 )及び13
mm以下の粒度調整粒子(C3 )とこれらに対して3重
量%相当の生石灰(D)とを混合機(4)に供給して粒
子の表面に生石灰(D)を付着させた後、常温で7日間
養生処理した。
Examples 1 to 6 and Comparative Examples 1 to 2 Press dewatered cakes having a water content of 31% produced from a quarry were used as the stone powder dewatered cake (A). First, the stone powder dewatered cake (A) and each of the water-soluble polymer powders (B) shown in Table 2 are supplied to the stirring and mixing tank (1) and treated at each mixing time (residence time) shown in Table 2. After being converted into particles (C), the particles were supplied to a sieving machine ( 2 ) and divided into on-sieving particles (C 1 ) and under-sieving particles (C 2 ). Next, the on-screen particles (C 1 ) were supplied to a particle size controller (3) to adjust the particle size to an average particle size of 13 mm or less. Then, the above-mentioned undersize particles (C 2 ) and 13
mm (C 3 ) and 3% by weight of quicklime (D) are supplied to a mixer (4) to attach the quicklime (D) to the surface of the particles, For 7 days.

【0030】評価法としては、養生品について、JIS
A 1211に従い、室内CBR試験を実施した。結
果を表2に示す。なお、表2中の比較例1は、水溶性重
合体粉末を使用せず、生石灰粉のみを使用した例である
が、粒状化しなかったため、CBRのみを測定した。表
2中の比較例2は、未処理の石粉脱水ケーキの場合であ
り、CBRの測定は不可能であった。表2の結果より、
本発明によれば、100%の製品化率で且つ均等係数U
c が小さい、すなわち、粒度の揃った石粉粒状体が得ら
れることが分かる。また、攪拌混合槽の滞留時間を調整
することにより、粒度の調整が出来ることが分かる。
As for the evaluation method, JIS
According to A1211, a laboratory CBR test was performed. Table 2 shows the results. In addition, Comparative Example 1 in Table 2 is an example in which the water-soluble polymer powder was not used and only the quick lime powder was used. However, since it did not granulate, only CBR was measured. Comparative Example 2 in Table 2 is a case of untreated stone powder dewatered cake, and measurement of CBR was impossible. From the results in Table 2,
According to the present invention, the productization rate is 100% and the uniformity factor U
It is understood that c is small, that is, stone powder granules having a uniform particle size can be obtained. Further, it can be seen that the particle size can be adjusted by adjusting the residence time of the stirring and mixing tank.

【0031】[0031]

【表2】 ──────────────────────────────────── 実施例 比較例 1 2 3 4 5 6 1 2 重合体種類 A B C D A A − − 重合体添加量(重量%) 0.1 0.1 0.3 0.3 0.1 0.1 − − 攪拌混合槽滞留時間(秒) 60 60 60 60 30 120 60 − 生石灰添加量(重量%) 3 3 3 3 3 3 3 − 平均粒径(mm) 1.2 1.2 1.6 2.7 1.5 1.0 − − Uc 2.1 2.2 2.1 3.3 2.3 1.9 − − CBR(%) 38 40 40 26 38 42 5.5 − ────────────────────────────────────Table 2 Example Comparative Example 1 2 3 4 5 6 1 2 Polymer type ABCDCA A--Amount of polymer added (% by weight) 0.1 0.1 0.3 0.3 0.1 0.1--Retention time of stirring and mixing tank (seconds) 60 60 60 60 30 120 60-Amount of quick lime added (weight %) 3 3 3 3 3 3 3 - average particle size (mm) 1.2 1.2 1.6 2.7 1.5 1.0 - - U c 2.1 2.2 2.1 3.3 2.3 1.9 - - CBR (%) 38 40 40 26 38 42 5.5 - ──── ────────────────────────────────

【0032】実施例7〜8及び比較例3〜4 プレス脱水前のシックナーでの濃縮スラリー(含水比6
8%)に乾燥石粉を添加して含水比35%の石粉脱水ケ
ーキを得た。このケーキ使用して実施例1と同様に改良
試験を行なった。結果を表3に示す。表3中の比較例3
は、生石灰を使用しない例であり、硬化が遅くて石粉脱
水ケーキが合着してしまった。また、表3中の比較例4
は、水溶性重合体粉末を使用しない例であり、石粉脱水
ケーキが塊状となってしまった。表3の結果より明らか
な様に、本発明によれば、プレス脱水せずに石粉脱水ケ
ーキの改良を行うことが出来、また、セメント粉末を併
用することにより任意の強度に高められた石粉粒状体を
製造することが出来る。
Examples 7 and 8 and Comparative Examples 3 and 4 Concentrated slurries (thickness: 6) with a thickener before press dewatering
8%) to obtain a dehydrated stone powder cake having a water content of 35%. Using this cake, an improvement test was conducted in the same manner as in Example 1. Table 3 shows the results. Comparative Example 3 in Table 3
Is an example in which quicklime is not used, and the hardening is slow and the dehydrated stone powder coalesces. Comparative Example 4 in Table 3
Is an example in which the water-soluble polymer powder is not used, and the dehydrated stone powder cake has become a lump. As is evident from the results in Table 3, according to the present invention, it is possible to improve the stone powder dewatered cake without press dewatering, and to improve the strength of the stone powder granules to an arbitrary strength by using cement powder in combination. Body can be manufactured.

【0033】[0033]

【表3】 ─────────────────────────── 実施例 比較例 7 8 3 4 重合体種類 A A A − 重合体添加量(重量%) 0.1 0.1 0.1 − セメント 添加量(重量%) 3 − 3 3 生石灰添加量(重量%) 3 3 − 3 平均粒径(mm) 1.2 1.2 1.2 塊状 Uc 2.0 2.1 2.0 − CBR(%) 52 32 11 24 ───────────────────────────Table 3 Example Comparative Example 7 8 3 4 Polymer Type A A A A-Polymer Addition Amount (wt%) 0.1 0.1 0.1 - cement additive amount (wt%) 3 - 3 3 lime addition amount (wt%) 3 3 - 3 mean particle size (mm) 1.2 1.2 1.2 bulk U c 2.0 2.1 2.0 - CBR ( %) 52 32 11 24 ───────────────────────────

【0034】[0034]

【発明の効果】以上説明した本発明によれば、これ迄、
産業廃棄物として処分していた石粉の脱水ケーキを原料
とし、強度が高く、透水性が優れた任意の粒度分布の石
粉粒状体を製造することが出来る。そして、得られた石
粉粒状体は、有効な建設資材として再利用することが出
来る。また、本発明の製造方法と石粉脱水ケーキの回収
プロセスとを組み合わせることにより、回収プロセスの
プレス脱水機の圧力を下げて効率的な運転を行うことが
出来る他、プレス脱水機を省略することも可能である。
According to the present invention described above,
By using a dehydrated cake of stone powder that has been disposed of as industrial waste as a raw material, it is possible to produce a stone powder granule having an arbitrary particle size distribution having high strength and excellent water permeability. And the obtained stone powder granular material can be reused as an effective construction material. In addition, by combining the production method of the present invention and the process of recovering a stone powder dewatered cake, the pressure of the press dewatering machine in the recovery process can be reduced to operate efficiently, and the press dewatering machine can be omitted. It is possible.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の製造方法の一例の工程説明図FIG. 1 is a process explanatory view of one example of a production method of the present invention.

【図2】本発明の製造工程で好適に使用される篩分機の
一例の説明図
FIG. 2 is an explanatory view of an example of a sieving machine suitably used in the production process of the present invention.

【符号の説明】[Explanation of symbols]

A:石粉脱水ケーキ B:水溶性重合体粉末 C:石粉粒子 C1 :篩上粒子 C2 :篩下粒子 C3 :粒度調整粒子 D:固化剤粉末 E:石粉粒状体 1:撹拌混合槽 2:篩分機 3:粒度調整機 4:混合機A: Stone powder dewatered cake B: Water-soluble polymer powder C: Stone powder particles C 1 : On-screen particles C 2 : Undersize particles C 3 : Particle size adjusting particles D: Solidifying agent powder E: Stone powder granules 1: Stir and mix tank 2 : Sieving machine 3: Particle size adjusting machine 4: Mixing machine

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 石粉脱水ケーキと水溶性重合体粉末また
は水溶性重合体粉末とセメント粉末とを撹拌混合槽に供
給して処理することにより造粒した後、得られた粒子を
篩分機に供給して篩上粒子と篩下粒子とに分割し、次い
で、篩上粒子を粒度調整機に供給して粒度調整するか、
または、上記の撹拌混合槽に循環供給し、上記の篩下粒
子および粒度調整粒子と固化剤粉末とを混合機に供給し
て粒子の表面に固化剤粉末を付着させた後、養生処理す
ることを特徴とする石粉粒状体の製造方法。
Claims 1. A stone powder dewatered cake and a water-soluble polymer powder or a water-soluble polymer powder and a cement powder are supplied to a stirring and mixing tank to be processed and granulated, and then the obtained particles are supplied to a sieving machine. And then divided into on-sieve particles and under-sieve particles, and then supply the on-sieve particles to a particle size adjuster to adjust the particle size,
Alternatively, by circulating and supplying the above-mentioned stirring and mixing tank, supplying the above-mentioned undersize particles and the particle size adjusting particles and the solidifying agent powder to a mixer to cause the solidifying agent powder to adhere to the surface of the particles, and then performing a curing treatment. A method for producing a stone powder granule, characterized by the following.
【請求項2】 撹拌混合槽として一軸または二軸式の連
続式または回分式撹拌混合槽を使用し、篩分機として回
転式円筒型篩分機を使用する請求項1に記載の製造方
法。
2. The production method according to claim 1, wherein a uniaxial or biaxial continuous or batch type stirring / mixing tank is used as the stirring / mixing tank, and a rotary cylindrical sieving machine is used as the sieving machine.
【請求項3】 石粉脱水ケーキが、採石場、砕石場また
は石切場における石粉の排水処理プロセスから回収され
る石粉脱水ケーキである請求項1又は2に記載の製造方
法。
3. The method according to claim 1, wherein the stone powder dewatered cake is a stone powder dewatered cake recovered from a stone powder wastewater treatment process in a quarry, a quarry or a quarry.
JP17862496A 1996-06-19 1996-06-19 Method for producing stone powder granules Expired - Fee Related JP3639049B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17862496A JP3639049B2 (en) 1996-06-19 1996-06-19 Method for producing stone powder granules

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17862496A JP3639049B2 (en) 1996-06-19 1996-06-19 Method for producing stone powder granules

Publications (2)

Publication Number Publication Date
JPH105722A true JPH105722A (en) 1998-01-13
JP3639049B2 JP3639049B2 (en) 2005-04-13

Family

ID=16051713

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3639049B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001107352A (en) * 1999-10-13 2001-04-17 Asanuma Corp Underground cavity filling construction method
JP2001278647A (en) * 2000-03-30 2001-10-10 Takenaka Komuten Co Ltd Raw material for civil engineering and construction and method of producing same
JP2002137956A (en) * 2000-10-24 2002-05-14 Kobe Steel Ltd Method of manufacturing hydrothermally solidified formed boyd consisting of crushed stone byproduct
ITBA20110056A1 (en) * 2011-10-13 2013-04-14 Antonio Ninivaggi PROCEDURE FOR THE TRANSFORMATION OF SLUDGES BY SAGAGUE PROCESSING, BASIC COMPONENT FOR PASTA PRODUCTION OF: STUCCHI, ADHESIVES, WATERPROOFINGS.
JP2016011569A (en) * 2014-06-30 2016-01-21 タマチ電機株式会社 Semi-solidified gravel washing soil, production method thereof and ground formation method using the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001107352A (en) * 1999-10-13 2001-04-17 Asanuma Corp Underground cavity filling construction method
JP2001278647A (en) * 2000-03-30 2001-10-10 Takenaka Komuten Co Ltd Raw material for civil engineering and construction and method of producing same
JP2002137956A (en) * 2000-10-24 2002-05-14 Kobe Steel Ltd Method of manufacturing hydrothermally solidified formed boyd consisting of crushed stone byproduct
ITBA20110056A1 (en) * 2011-10-13 2013-04-14 Antonio Ninivaggi PROCEDURE FOR THE TRANSFORMATION OF SLUDGES BY SAGAGUE PROCESSING, BASIC COMPONENT FOR PASTA PRODUCTION OF: STUCCHI, ADHESIVES, WATERPROOFINGS.
JP2016011569A (en) * 2014-06-30 2016-01-21 タマチ電機株式会社 Semi-solidified gravel washing soil, production method thereof and ground formation method using the same

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