JP2005104759A - Treating method of waste gypsum board - Google Patents
Treating method of waste gypsum board Download PDFInfo
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- JP2005104759A JP2005104759A JP2003338654A JP2003338654A JP2005104759A JP 2005104759 A JP2005104759 A JP 2005104759A JP 2003338654 A JP2003338654 A JP 2003338654A JP 2003338654 A JP2003338654 A JP 2003338654A JP 2005104759 A JP2005104759 A JP 2005104759A
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- gypsum
- gypsum board
- waste
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- board
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 75
- 239000010440 gypsum Substances 0.000 title claims abstract description 75
- 239000002699 waste material Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 6
- 238000010304 firing Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000009991 scouring Methods 0.000 claims description 6
- 150000004683 dihydrates Chemical class 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 229910052925 anhydrite Inorganic materials 0.000 claims 1
- 239000011505 plaster Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 239000002689 soil Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 239000004035 construction material Substances 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 239000004566 building material Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000000386 athletic effect Effects 0.000 description 1
- OEBRCCBJHHOFCQ-UHFFFAOYSA-N bismuth;dihydrate Chemical compound O.O.[Bi] OEBRCCBJHHOFCQ-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/58—Construction or demolition [C&D] waste
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- Processing Of Solid Wastes (AREA)
Abstract
Description
本発明は、建築廃材の石膏ボードのリサイクルに関し、廃石膏ボードから石膏分のみを精練して再生石膏を得る再生石膏の製造方法に関するものである。 TECHNICAL FIELD The present invention relates to recycling of gypsum board of construction waste material, and relates to a method for producing regenerated gypsum to obtain regenerated gypsum by refining only gypsum content from waste gypsum board.
従来、建築廃材の石膏ボードは廃棄物として埋設処理するか、粉砕した後、外装紙等の夾雑物（イグロス）を篩にかけて可能な限り除去し廃石膏を再利用している。（例えば、特許文献１参照。）。 Conventionally, gypsum boards for building waste have been either buried as waste or pulverized, and then dust (such as exterior paper) is removed as much as possible by sieving to reuse the gypsum. (For example, refer to Patent Document 1).
しかしながら、廃石膏の中には篩にかけただけでは分離できない接着成分等が含まれており、例えば、運動競技場で使用されるマーキング用の石膏等のように、その用途が限られていた。そこで、廃石膏ボードに含まれる紙等の夾雑物（イグロス）をロータリーキルン炉を用いて焼成除去し、ポルトランドセメント等の調整用の二水石膏等として再利用する技術が提案されている。（例えば、特許文献２参照。）。 However, waste gypsum contains adhesive components and the like that cannot be separated only by sieving. For example, the use of gypsum for marking used in athletic fields is limited. In view of this, a technique has been proposed in which foreign substances (eg, gross) such as paper contained in waste gypsum board are burned and removed using a rotary kiln furnace and reused as dihydrate gypsum for adjustment of Portland cement and the like. (For example, refer to Patent Document 2).
本発明もまた、上記従来技術の課題に鑑み、廃石膏ボードの再利用を図ることを目的として開発されたものであり、再石膏ボード等の建築用資材としての利用は無論のこと、プランター等の再生製品の作製や土壌固形剤、水分調整剤、防災用資材等、多岐にわたって再利用可能な廃石膏ボードの処理方法を提供することを目的とするものである。 The present invention has also been developed for the purpose of reusing waste gypsum board in view of the above-mentioned problems of the prior art, and of course, its use as a building material such as re-gypsum board, planters, etc. The purpose is to provide a method for treating waste gypsum board that can be reused in a wide variety of fields, such as the production of recycled products, soil solids, moisture regulators, and disaster prevention materials.
このため、本発明の廃石膏ボードの処理方法は、廃石膏ボードを粉砕する工程と、粉砕された廃石膏ボード粉をロータリーキルン炉で加熱して石膏ボードに含まれる夾雑物（イグロス）を焼成分離すると共に石膏分を乾燥して精練石膏を得る工程とを含む廃石膏ボードからの再生石膏の製造方法において、焼成温度及びロータリーキルン炉の回転数を調節することで、前記精練石膏に含まれる無水石膏（ＣａＳＯ４）、半水石膏（ＣａＳＯ４・１／２Ｈ２Ｏ）及び三分の二水石膏（ＣａＳＯ４・２／３Ｈ２Ｏ）の割合を変化させることを特徴とする。 For this reason, the processing method of the waste gypsum board of the present invention includes a step of pulverizing the waste gypsum board, and heating and separating the crushed waste gypsum board powder in a rotary kiln furnace to burn and separate impurities contained in the gypsum board. And drying the gypsum content to obtain a scoured gypsum, in a method for producing reclaimed gypsum from waste gypsum board, by adjusting the firing temperature and the rotational speed of the rotary kiln furnace, the anhydrous gypsum contained in the scoured gypsum The ratio of (CaSO 4 ), hemihydrate gypsum (CaSO 4 · 1 / 2H 2 O), and half-thirds gypsum (CaSO 4 · 2 / 3H 2 O) is varied.
本発明によれば、再石膏ボード等の建築用資材としての利用のみならず、プランター等の再生製品の作製や土壌固形剤、水分調整剤等として多岐にわたって再利用可能な廃石膏ボードの処理方法が得られる。 According to the present invention, not only as a building material such as a reclaimed gypsum board, but also a method for treating a waste gypsum board that can be widely reused as a remanufactured product such as a planter, a soil solid agent, a moisture conditioner, etc. Is obtained.
次に、本発明の実施の形態を図面に示す実施例に基づいて説明する。
図１は本発明の製造工程図、図２は本発明で使用する精練装置を摸式的に示す側面図である。
Next, embodiments of the present invention will be described based on examples shown in the drawings.
FIG. 1 is a production process diagram of the present invention, and FIG. 2 is a side view schematically showing a scouring apparatus used in the present invention.
まず、本発明の処理方法を図１及び図２に従って説明する。先ず、廃石膏ボード１を破砕機２に投入し粉砕した（Ａ）。ここで、破砕機としては、ロールクラッシャー、インパクトクラッシャー、ボールミル等が使用できる。粉砕された廃石膏ボード粉はスクリューコンベア３によりロータリーキルン炉６の投入ホッパー４から投入される。投入ホッパー４から投入された廃石膏ボード粉は、スクリューフィーダー５により順次ロータリーキルン炉６内に搬送され、バーナー７により加熱されて石膏ボードに含まれる夾雑物（イグロス）を焼成分離すると共に石膏分が乾燥される（Ｂ１）。ここで、ロータローキルンの回転数（２〜４ｒｐｍ／分）、加熱温度約２００℃〜２５０℃程度で攪拌焼成した。これにより、主に紙材と接着剤とからなる外装材の夾雑物（イグロス）は完全に灰化される。灰になった夾雑物（イグロス）は排気煙突８を介して集塵機であるサイクロンフィルター９にて集塵除去される（Ｃ）。以上の工程により夾雑物（イグロス）を含まず無水石膏（ＣａＳＯ４）が２２％、半水石膏（ＣａＳＯ４・１／２Ｈ２Ｏ）及び三分の二水石膏（ＣａＳＯ４・２／３Ｈ２Ｏ）の割合が７８％の精練石膏１０ａが得られた。
First, the processing method of the present invention will be described with reference to FIGS. First, the waste gypsum board 1 was put into the
得られた精練石膏１０ａは、半水石膏（ＣａＳＯ４・１／２Ｈ２Ｏ）及び三分の二水石膏（ＣａＳＯ４・２／３Ｈ２Ｏ）の割合が多く、とくに水和処理することなく、そのままの状態で、バージン石膏１１のみを加え、これに混水して型入れ養生固化し成形することにより、建築用資材として十分な強度を持つブロックや花卉用プランター等の固化再生製品１４を製造することができる。尚、とくに強度を要する成形品を作製する場合、例えば中性固化剤等としてアルミナセメント１２等を添加すると良い。バージン石膏１１及びアルミナセメント１２を混合し（Ｄ）、この再生石膏１３を使用して直方体形の試験体（幅６３ｍｍ×長さ２００ｍｍ×高さ１００ｍｍ）を作成し耐圧試験を行なった。精練石膏を８５％バージン石膏を１５％混合したものでは、破砕荷重が２４．２ｋＮ（質量１５７８．４ｇ）で、耐圧強度１．９２Ｎ／ｍｍ２であった。精練石膏を７０％バージン石膏を１５％及びアルミナセメントを１５％混合したものでは、破砕荷重が３４．６ｋＮ（質量１５８２．１ｇ）で、耐圧強度２．５７Ｎ／ｍｍ２であった。この実験結果よりアルミナセメントを混合した再生石膏を使用した再生製品はバージン石膏のみを混合したのもに比して約１．３倍の強度を示すことが判った。 The obtained scoured gypsum 10a has a large proportion of hemihydrate gypsum (CaSO 4 · 1 / 2H 2 O) and bismuth dihydrate gypsum (CaSO 4 · 2 / 3H 2 O) without any hydration treatment. In this state, by adding only virgin gypsum 11 and mixing it with water to mold and cure and solidify it, the solidified recycled product 14 such as a block or flower planter having sufficient strength as a building material can be obtained. Can be manufactured. In the case of producing a molded product that particularly requires strength, for example, alumina cement 12 may be added as a neutral solidifying agent. Virgin gypsum 11 and alumina cement 12 were mixed (D), and using this regenerated gypsum 13, a rectangular parallelepiped test body (width 63 mm × length 200 mm × height 100 mm) was prepared and subjected to a pressure resistance test. When 15% of scoured gypsum was mixed with 15% of virgin gypsum, the crushing load was 24.2 kN (mass 1578.4 g) and the pressure strength was 1.92 N / mm 2 . When scouring gypsum was mixed with 70% virgin gypsum and 15% alumina cement, the crushing load was 34.6 kN (mass 1582.1 g) and the pressure strength was 2.57 N / mm 2 . From this experimental result, it was found that the regenerated product using the regenerated gypsum mixed with the alumina cement showed about 1.3 times the strength as compared with the case where only the virgin gypsum was mixed.
上記と同様の工程で、ロータローキルン炉９の回転数（２〜４ｒｐｍ／分）、加熱温度約２８０℃〜３５０℃程度で攪拌焼成した（Ｂ２）。得られた精練石膏１０ｂは、夾雑物（イグロス）を含まず無水石膏（ＣａＳＯ４）が７２％、半水石膏（ＣａＳＯ４・１／２Ｈ２Ｏ）と三分の二水石膏（ＣａＳＯ４・２／３Ｈ２Ｏ）を合せた割合が２８％であった。無水石膏の割合が多い精練石膏１０ｂは、土壌固形剤・路面硬化剤、あるいは水分調整剤１５として好適に利用できる。 In the same process as described above, stirring and firing were performed at a rotational speed of the rotary kiln furnace 9 (2 to 4 rpm / min) and a heating temperature of about 280 ° C. to 350 ° C. (B2). The obtained scoured gypsum 10b does not contain foreign matter (igloss), is 72% anhydrous gypsum (CaSO 4 ), half-hydrate gypsum (CaSO 4 · 1 / 2H 2 O), and half-dihydrate gypsum (CaSO 4 · 2 / 3H 2 O) was 28%. The scoured gypsum 10b having a large proportion of anhydrous gypsum can be suitably used as a soil solid agent, a road surface curing agent, or a moisture adjusting agent 15.
本発明によれば、再石膏ボード等の建築用資材としての利用のみならず、プランター等の再生製品の作製や土壌固形剤、水分調整剤等として多岐にわたって再利用可能な廃石膏ボードの処理方法が得られ、建築廃材の石膏ボードのリサイクルに大いに貢献する。 According to the present invention, not only as a building material such as a reclaimed gypsum board, but also a method for treating a waste gypsum board that can be widely reused as a remanufactured product such as a planter, a soil solid agent, a moisture conditioner, etc. And contributes greatly to the recycling of gypsum board from building waste.
１ 石膏ボード廃材
２ 破砕機
３ スクリューコンベア
４ 投入ホッパー
５ スクリューフィーダー
６ ロータリーキルン炉
７ バーナー
８ 排気煙突
９ サイクロンフィルター（集塵機）
１０ａ 精練石膏
１０ｂ 精練石膏
１１ バージン石膏
１２ アルミナセメント
１３ 再生石膏
１４ ブロック・プランター等の再生品
１５ 土壌固形剤・路面硬化剤・水分調整剤
1
DESCRIPTION OF SYMBOLS 10a Scouring gypsum 10b Scouring gypsum 11 Virgin gypsum 12 Alumina cement 13 Recycled gypsum 14 Recycled goods such as blocks and planters 15
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003338654A JP2005104759A (en) | 2003-09-29 | 2003-09-29 | Treating method of waste gypsum board |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003338654A JP2005104759A (en) | 2003-09-29 | 2003-09-29 | Treating method of waste gypsum board |
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| Publication Number | Publication Date |
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| JP2005104759A true JP2005104759A (en) | 2005-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003338654A Pending JP2005104759A (en) | 2003-09-29 | 2003-09-29 | Treating method of waste gypsum board |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005336005A (en) * | 2004-05-26 | 2005-12-08 | Mitsubishi Materials Corp | Method for producing cement composition |
| JP2006321663A (en) * | 2005-05-17 | 2006-11-30 | Tadano Ltd | Apparatus for manufacturing gypsum hemi-hydrate and method of continuously manufacturing gypsum hemi-hydrate |
| JP2007132552A (en) * | 2005-11-08 | 2007-05-31 | Kyudenko Corp | Heating device for waste gypsum |
| JP2007308342A (en) * | 2006-05-19 | 2007-11-29 | Nikko Co Ltd | Apparatus and method for thermally regenerating waste gypsum |
| JP2007308343A (en) * | 2006-05-19 | 2007-11-29 | Nikko Co Ltd | Apparatus for thermally regenerating waste gypsum |
| JP2008024563A (en) * | 2006-07-24 | 2008-02-07 | Nikko Co Ltd | Apparatus for thermal regenerative treatment of waste gypsum |
| JP2009040638A (en) * | 2007-08-09 | 2009-02-26 | Tokuyama Corp | Manufacture method of gypsum dihydrate |
| CN104003636A (en) * | 2014-06-12 | 2014-08-27 | 安玉奎 | Gypsum processing system |
| CN106186770A (en) * | 2016-07-21 | 2016-12-07 | 武汉源锦商品混凝土有限公司 | Activation method of regenerated micro powder |
| CN113600608A (en) * | 2021-07-28 | 2021-11-05 | 上海又宏环保科技有限公司 | Device and process method for preparing spherical particles of modified acid rain acidified soil by recycling waste gypsum plasterboards |
| CN114775211A (en) * | 2022-04-24 | 2022-07-22 | 萍乡市人民医院 | Orthopedics abandonment gypsum intelligence reducing mechanism |
| CN114988832A (en) * | 2022-05-18 | 2022-09-02 | 中国地质大学（武汉） | Method for preparing daily flowerpot by utilizing regenerated gypsum and burnt waste ceramic sand |
-
2003
- 2003-09-29 JP JP2003338654A patent/JP2005104759A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005336005A (en) * | 2004-05-26 | 2005-12-08 | Mitsubishi Materials Corp | Method for producing cement composition |
| JP2006321663A (en) * | 2005-05-17 | 2006-11-30 | Tadano Ltd | Apparatus for manufacturing gypsum hemi-hydrate and method of continuously manufacturing gypsum hemi-hydrate |
| JP2007132552A (en) * | 2005-11-08 | 2007-05-31 | Kyudenko Corp | Heating device for waste gypsum |
| JP2007308342A (en) * | 2006-05-19 | 2007-11-29 | Nikko Co Ltd | Apparatus and method for thermally regenerating waste gypsum |
| JP2007308343A (en) * | 2006-05-19 | 2007-11-29 | Nikko Co Ltd | Apparatus for thermally regenerating waste gypsum |
| JP2008024563A (en) * | 2006-07-24 | 2008-02-07 | Nikko Co Ltd | Apparatus for thermal regenerative treatment of waste gypsum |
| JP2009040638A (en) * | 2007-08-09 | 2009-02-26 | Tokuyama Corp | Manufacture method of gypsum dihydrate |
| CN104003636A (en) * | 2014-06-12 | 2014-08-27 | 安玉奎 | Gypsum processing system |
| CN106186770A (en) * | 2016-07-21 | 2016-12-07 | 武汉源锦商品混凝土有限公司 | Activation method of regenerated micro powder |
| CN106186770B (en) * | 2016-07-21 | 2017-10-17 | 武汉源锦商品混凝土有限公司 | Activation method of regenerated micro powder |
| CN113600608A (en) * | 2021-07-28 | 2021-11-05 | 上海又宏环保科技有限公司 | Device and process method for preparing spherical particles of modified acid rain acidified soil by recycling waste gypsum plasterboards |
| CN114775211A (en) * | 2022-04-24 | 2022-07-22 | 萍乡市人民医院 | Orthopedics abandonment gypsum intelligence reducing mechanism |
| CN114775211B (en) * | 2022-04-24 | 2023-12-05 | 萍乡市人民医院 | Intelligent smashing device for waste gypsum in orthopedics department |
| CN114988832A (en) * | 2022-05-18 | 2022-09-02 | 中国地质大学（武汉） | Method for preparing daily flowerpot by utilizing regenerated gypsum and burnt waste ceramic sand |
| CN114988832B (en) * | 2022-05-18 | 2022-10-28 | 中国地质大学（武汉） | Method for preparing daily flowerpot by using regenerated gypsum and waste ceramic sand |
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