JPS6319460B2 - - Google Patents
Info
- Publication number
- JPS6319460B2 JPS6319460B2 JP58141935A JP14193583A JPS6319460B2 JP S6319460 B2 JPS6319460 B2 JP S6319460B2 JP 58141935 A JP58141935 A JP 58141935A JP 14193583 A JP14193583 A JP 14193583A JP S6319460 B2 JPS6319460 B2 JP S6319460B2
- Authority
- JP
- Japan
- Prior art keywords
- add
- slaked lime
- sludge
- incineration
- powder
- 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
- 239000000843 powder Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000010801 sewage sludge Substances 0.000 claims description 2
- 239000012024 dehydrating agents Substances 0.000 claims 1
- 239000010802 sludge Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】
従来、下水道の終末処理場において大量に集積
された汚泥土は、これに消石灰を添加して焼却し
灰化させて、海中や窪地などに廃棄してきた。DETAILED DESCRIPTION OF THE INVENTION Conventionally, sludge soil accumulated in large quantities at sewage treatment plants has been incinerated by adding slaked lime to ashes and disposed of in the sea or in depressions.
ところが、その消石灰が焼却添加材としてはコ
ストが高かつた。 However, slaked lime was expensive to use as an additive for incineration.
この発明は、上記の廃棄される大量の汚泥土を
有益に活用する方法及び低コストの焼却添加材の
選択を研究して、これを土木工事に利用できる物
質を得ようと企図したものである。 This invention is an attempt to obtain a material that can be used in civil engineering work by researching methods for making beneficial use of the large amounts of discarded sludge and selecting low-cost incineration additives. .
そこで製鉄に際し生ずる残滓鉱物即ち鉱滓（ス
ラブ）は、これにアルカリ又は硫酸塩類を添加す
ると、水中においても硬化する所謂水硬性を有す
る。 Therefore, residual minerals, ie, slags (slabs) produced during iron manufacturing have so-called hydraulic properties that harden even in water when alkali or sulfates are added thereto.
また上記の汚泥焼却灰は、一般にPH８〜９の弱
アルカリであるから、これに鉱滓を添加すれば水
硬性が得られることが判つた。 Furthermore, since the above-mentioned sludge incineration ash is generally a weak alkali with a pH of 8 to 9, it has been found that hydraulic properties can be obtained by adding slag to it.
従つて汚泥土中の粘土質分に酸化カルシウム分
を多く含んだ鉱滓または石粉を添加すれば、普通
セメントの性分に近い物質が得られる訳である。
従つて焼却添加材として消石灰の価額の1/3乃至
１／４に相当する安価な鉱滓粉末と炭酸カルシウム
石粉とを選択した。 Therefore, if slag or stone powder containing a large amount of calcium oxide is added to the clayey content of sludge soil, a substance with properties similar to ordinary cement can be obtained.
Therefore, cheap slag powder and calcium carbonate stone powder, which are equivalent to 1/3 to 1/4 of the price of slaked lime, were selected as incineration additives.
よつて上記の廃棄される汚泥土から有益な再生
物質として水硬性低強度セメントを得た実験の結
果は下記の通りである。 The results of an experiment in which hydraulic low-strength cement was obtained as a useful recycled material from the above-mentioned discarded sludge soil are as follows.
例１ 汚泥土水100c.c.（実質汚泥量２ｇ）に鉱滓
微粉末（0.074mm以下の粒径）１ｇ〜４ｇ、炭
酸カルシウム石粉１〜４ｇ及び消石灰0.5ｇを
各添加混合し、これに脱水剤として塩化第二鉄
５mlを添加し脱水して乾燥させた後、電気炉に
より１時間800゜〜1200℃で焼成して焼却灰微粉
末のセメントを生成した。Example 1 Add and mix 1 to 4 g of fine slag powder (particle size of 0.074 mm or less), 1 to 4 g of calcium carbonate stone powder, and 0.5 g of slaked lime to 100 c.c. of sludge soil water (actual amount of sludge 2 g), and then dehydrate it. After adding 5 ml of ferric chloride as an agent, dehydrating and drying the mixture, it was fired in an electric furnace at 800° to 1200°C for 1 hour to produce cement as a fine powder of incinerated ash.
このセメントに45％の蒸留水を添加し軟練状
態を作出させて、これを型枠に流入して24時間
空中に載置した後、21℃の水中に入れて養生し
た後、その圧縮強度を測定した結果、下記の通
りである。 45% distilled water was added to this cement to create a softened state, which was poured into a formwork and placed in the air for 24 hours, then placed in water at 21°C to cure, and its compressive strength The results of the measurements are as follows.
１週間後 15Kg／cm2
２ 同上 28 同上
３ 同上 46 同上
上記の通りに生成された水硬性低強度セメント
は、廃棄される大量の下水汚泥土より、然も従来
よりも低コストの焼却添加材の添加により得られ
る画期的な再生物質であつて、軟質土壌の改良硬
化材として、また道路路盤材の強化補助材料とし
て広く土木工事に大量に供給することができる。1 week later 15Kg/cm 2 2 Same as above 28 Same as above 3 Same as above 46 Same as above Hydraulic low strength cement produced as above can be used as an incineration additive which is cheaper than the large amount of sewage sludge soil that is disposed of and is cheaper than conventional ones. It is an epoch-making recycled material obtained by adding , and can be widely supplied in large quantities to civil engineering works as an improvement hardening material for soft soils and as an auxiliary reinforcing material for road base materials.
Claims (1)
を下水汚泥土水に各添加混合し、これに脱水剤を
添加し脱水して乾燥させた後、電気炉で焼成して
水硬性低強度セメントを製造する方法。1. Add and mix slag fine powder, calcium carbonate stone powder, and slaked lime to sewage sludge soil water, add a dehydrating agent to this, dehydrate it, dry it, and then bake it in an electric furnace to produce hydraulic low-strength cement. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141935A JPS6033237A (en) | 1983-08-04 | 1983-08-04 | Use of sewage sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141935A JPS6033237A (en) | 1983-08-04 | 1983-08-04 | Use of sewage sludge |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62243630A Division JPH02141443A (en) | 1987-09-30 | 1987-09-30 | Production of low-strength hydraulic cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6033237A JPS6033237A (en) | 1985-02-20 |
| JPS6319460B2 true JPS6319460B2 (en) | 1988-04-22 |
Family
ID=15303564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58141935A Granted JPS6033237A (en) | 1983-08-04 | 1983-08-04 | Use of sewage sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6033237A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004096705A1 (en) * | 2003-04-30 | 2004-11-11 | Nec Corporation | Nanocarbon producing device and nanocarbon producing method |
-
1983
- 1983-08-04 JP JP58141935A patent/JPS6033237A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6033237A (en) | 1985-02-20 |
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