JP2000001348A - Production of hydraulic material and cement - Google Patents
Production of hydraulic material and cementInfo
- Publication number
- JP2000001348A JP2000001348A JP10165313A JP16531398A JP2000001348A JP 2000001348 A JP2000001348 A JP 2000001348A JP 10165313 A JP10165313 A JP 10165313A JP 16531398 A JP16531398 A JP 16531398A JP 2000001348 A JP2000001348 A JP 2000001348A
- Authority
- JP
- Japan
- Prior art keywords
- sewage sludge
- ash
- content
- cement
- added
- 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.)
- Withdrawn
Links
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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水汚泥を用いて
地盤改良用の固化材やセメント原料等として有用な水硬
性材料を製造する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a hydraulic material useful as a solidifying material for soil improvement or a raw material for cement using sewage sludge.
【０００２】[0002]
【従来の技術】近年、下水汚泥処理場から大量に排出さ
れる下水汚泥ないし下水汚泥焼却灰については、その処
分地の不足や資源の有効利用の観点から、地盤改良用の
固化材やセメント原料等の水硬性材料への使用が検討さ
れている。2. Description of the Related Art In recent years, sewage sludge or sewage sludge incineration ash discharged from a sewage sludge treatment plant in large quantities has been hardened or improved for the purpose of ground improvement from the viewpoint of shortage of disposal sites and effective use of resources. It is being studied for use in hydraulic materials such as.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、下水汚
泥には、水硬性材料の水和反応を阻害するリン酸化合物
が多量に含まれているため、地盤改良用の固化材やセメ
ント等の水硬性材料の原料としては多量に使うことはで
きず、水硬性材料中のＰ2Ｏ5含有量が１％重量以下とな
るような、微量の使用が通例であった。However, since sewage sludge contains a large amount of a phosphate compound that inhibits the hydration reaction of hydraulic material, hydraulic sewage such as solidifying material for ground improvement or cement is required. It cannot be used in a large amount as a raw material of the material, and it is customary to use a very small amount such that the P 2 O 5 content in the hydraulic material becomes 1% by weight or less.
【０００４】本発明は上記従来の問題点を解決し、下水
汚泥及び／又はその焼却灰を有効利用する水硬性材料及
びセメントの製造方法を提供することを目的とする。[0004] It is an object of the present invention to solve the above-mentioned conventional problems and to provide a method for producing a hydraulic material and a cement which makes effective use of sewage sludge and / or its incinerated ash.
【０００５】[0005]
【課題を解決するための手段】請求項１の水硬性材料の
製造方法は、下水汚泥及び／又はその焼却灰にフッ素化
合物を該下水汚泥焼却灰中のＰ2Ｏ5含有量（未焼却の下
水汚泥の場合は焼却灰に換算した場合のＰ2Ｏ5含有量）
に対してＦ換算で３〜１５重量％添加した後、１０００
〜１３００℃で焼成することを特徴とする。According to a first aspect of the present invention, there is provided a method for producing a hydraulic material, wherein a fluorine compound is added to sewage sludge and / or its incineration ash, and the P 2 O 5 content in the sewage sludge incineration ash (unincinerated ash). In the case of sewage sludge, P 2 O 5 content when converted to incinerated ash)
After adding 3 to 15% by weight in terms of F,
It is characterized by firing at １1300 ° C.
【０００６】請求項２の水硬性材料の製造方法は、下水
汚泥及び／又はその焼却灰にフッ素化合物を該下水汚泥
焼却灰中のＰ2Ｏ5含有量（未焼却の下水汚泥の場合は焼
却灰に換算した場合のＰ2Ｏ5含有量）に対して、Ｆ換算
で３〜１５重量％添加すると共に、カルシウム化合物を
該下水汚泥焼却灰中のＰ2Ｏ5含有量に対してＣａＯ添加
量で１００〜５００重量％となるように添加した後、１
０００〜１３００℃で焼成することを特徴とする。According to a second aspect of the present invention, there is provided a method for producing a hydraulic material, wherein a fluorine compound is added to sewage sludge and / or its incinerated ash, and the P 2 O 5 content in the sewage sludge incinerated ash (in the case of unincinerated sewage sludge, against P 2 O 5 content) when converted to ash, with the addition of 3-15 wt% in terms of F, CaO adding calcium compound to a P 2 O 5 content of the lower water sludge incineration ash After adding so that the amount becomes 100 to 500% by weight, 1
It is characterized by firing at 000 to 1300 ° C.
【０００７】請求項３の水硬性材料の製造方法は、セメ
ント用調合原料に下水汚泥及び／又はその焼却灰と、該
下水汚泥焼却灰中のＰ2Ｏ5含有量（未焼却の下水汚泥の
場合は焼却灰に換算した場合のＰ2Ｏ5含有量）に対して
Ｆ換算で５〜５０重量％のフッ素化合物とを混合して焼
成することを特徴とする。According to a third aspect of the present invention, there is provided a method for producing a hydraulic material, wherein sewage sludge and / or its incineration ash and P 2 O 5 content in the incineration ash of the sewage sludge (the amount of unincinerated sewage sludge) In this case, it is characterized in that the mixture is mixed with 5 to 50% by weight of a fluorine compound in terms of F with respect to the P 2 O 5 content in terms of incinerated ash and then fired.
【０００８】本発明による水硬性材料及びセメントへの
汚泥及び／又はその焼却灰の適用の作用機構は、リン酸
化合物を多量含有する下水汚泥及び／又はその焼却灰
に、フッ素化合物と必要に応じてカルシウム化合物を混
ぜて焼成すると、リン酸化合物が優先的にフッ素アパタ
イト（ＣａＯ）5（ＰＯ4）3Ｆとして結合して不溶化
し、主要セメントクリンカー鉱物のエーライトの生成を
阻害しないようになるため、水硬性材料の強度及び凝結
性状に悪影響を及ぼさなくなることによる。The mechanism of action of the application of sludge and / or its incineration ash to hydraulic materials and cements according to the present invention is as follows. When a calcium compound is mixed and calcined, the phosphate compound is preferentially bound as fluorapatite (CaO) 5 (PO 4 ) 3 F and insolubilized, so that the production of alite, a main cement clinker mineral, is not inhibited. Therefore, the strength and setting properties of the hydraulic material are not adversely affected.
【０００９】なお、以下において、下水汚泥焼却灰のＰ
2Ｏ5含有量に対するフッ素化合物のＦ換算添加量を「Ｆ
換算添加量（対Ｐ2Ｏ5）」と称し、下水汚泥焼却灰のＰ
2Ｏ5含有量に対するＣａＯとしてのカルシウム化合物添
加量を「ＣａＯ換算添加量（対Ｐ2Ｏ5）」と称す。[0009] In the following, P of sewage sludge incineration ash
The F conversion amount of the fluorine compound to the 2 O 5 content of "F
"Converted addition amount (relative to P 2 O 5 )"
The amount of the calcium compound added as CaO relative to the 2 O 5 content is referred to as “CaO-equivalent addition amount (vs. P 2 O 5 )”.
【００１０】[0010]
【発明の実施の形態】以下に本発明の実施の形態を詳細
に説明する。Embodiments of the present invention will be described below in detail.
【００１１】本発明において原料として使用される下水
汚泥焼却灰は、通常の下水汚泥を７００〜８００℃で焼
却して得られた焼却灰であり、通常は次のような化学分
析値を示す。The sewage sludge incineration ash used as a raw material in the present invention is incineration ash obtained by incinerating ordinary sewage sludge at 700 to 800 ° C., and usually shows the following chemical analysis values.
【００１２】［下水汚泥焼却灰の化学分析値（重量
％）］ ＳｉＯ2 ：１０〜５０重量％ Ａｌ2Ｏ3 ： ５〜２０重量％ Ｆｅ2Ｏ3 ： ３〜１５重量％ ＣａＯ ： ６〜５０重量％ Ｐ2Ｏ5 ： ６〜２５重量％ 強熱減量 ： ２〜１５重量％ 本発明では、このような下水汚泥及び／又はその焼却灰
にフッ素化合物及び必要に応じてカルシウム化合物を添
加混合して焼成する。ここで、フッ素化合物としては、
天然産の蛍石、合成したフッ化カルシウム、或いは、フ
ッ化カルシウム等のフッ素を含有する産業廃棄物などを
用いることができる。[Chemical analysis value (wt%) of sewage sludge incineration ash] SiO 2 : 10 to 50 wt% Al 2 O 3 : 5 to 20 wt% Fe 2 O 3 : 3 to 15 wt% CaO: 6 to 50 wt% wt% P 2 O 5: 6 to 25% by weight loss on ignition: the 2-15% by weight present invention, the calcium compound added and mixed, if such sewage sludge and / or fluorine compounds in the ash and the required And bake. Here, as the fluorine compound,
Naturally occurring fluorite, synthetic calcium fluoride, or industrial waste containing fluorine such as calcium fluoride can be used.
【００１３】フッ素化合物の添加量は、少な過ぎるとフ
ッ素アパタイトの形成のためにフッ素が不足し、逆に多
過ぎてもそれ以上のフッ素アパタイトの形成はなく不経
済であるため、Ｆ換算添加量（対Ｐ2Ｏ5）で３〜１５重
量％、好ましくは６〜９重量％とする。If the amount of the fluorine compound is too small, the amount of fluorine is insufficient due to the formation of fluorapatite. Conversely, if the amount is too large, no more fluorapatite is formed and it is uneconomical. (vs. P 2 O 5) 3 to 15 weight percent, preferably between 6-9 wt%.
【００１４】また、カルシウム化合物としては、石灰
石、生石灰、セメント、セメントクリンカー、セメント
用調合原料などを用いることができる。[0014] As the calcium compound, limestone, quicklime, cement, cement clinker, blended raw materials for cement and the like can be used.
【００１５】カルシウム化合物の添加量も、フッ素化合
物と同様、フッ素アパタイトの形成上好適な添加量で添
加するのが好ましく、ＣａＯ換算添加量（対Ｐ2Ｏ5）で
１００〜５００重量％、好ましくは１１０〜１４０重量
％とするのが好適である。The amount of the calcium compound to be added is preferably the same as the amount of the fluorine compound in terms of the formation of fluorapatite, and is preferably 100 to 500% by weight in terms of CaO (based on P 2 O 5 ). Is preferably 110 to 140% by weight.
【００１６】下水汚泥及び／又はその焼却灰にフッ素化
合物、更に必要に応じてカルシウム化合物を添加混合し
た後の焼成温度は１０００〜１３００℃とする。この焼
成温度が１０００℃未満の低温では、フッ素アパタイト
の形成反応が効率的に進行せず、１３００℃を超える高
温では焼成コストが高くつく。焼成後はボールミル等で
微粉砕して水硬性材料として用いることができる。The sintering temperature after adding and mixing a fluorine compound and, if necessary, a calcium compound to the sewage sludge and / or the incineration ash thereof is 1000 to 1300 ° C. If the firing temperature is lower than 1000 ° C., the formation reaction of fluoroapatite does not proceed efficiently, and if the firing temperature is higher than 1300 ° C., the firing cost is high. After firing, it can be finely pulverized with a ball mill or the like and used as a hydraulic material.
【００１７】なお、このようにして得られる水硬性材料
を地盤改良用の固化材として用いる場合、必要に応じ
て、硬石膏等の硬化促進材を添加混合するのが好まし
く、この場合、硬石膏の混合割合は、得られる固化材中
の硬石膏由来のＳＯ3量が５〜１５重量％程度となるよ
うな添加量とするのが好ましい。When the hydraulic material thus obtained is used as a solidifying material for ground improvement, it is preferable to add and mix a hardening accelerator such as anhydrite, if necessary. Is preferably added so that the amount of SO 3 derived from anhydrite in the obtained solidified material becomes about 5 to 15% by weight.
【００１８】また、本発明の水硬性材料をセメント原料
として用いる場合には、本発明のセメントの製造方法に
従って、次のようにしてセメントを製造すれば良い。即
ち、セメント用調合原料として通常のセメント用調合原
料（石灰石、粘土、珪石、鉄原料等）に下水汚泥及び／
又はその焼却灰及びフッ素化合物を混合して１３００〜
１４５０℃で焼成し、これに二水石膏を添加混合して微
粉砕する。この場合においても、フッ素化合物の添加量
は、Ｆ換算添加量（対Ｐ2Ｏ5）で５〜５０重量％、好ま
しくは２０〜４０重量％とする。セメントクリンカーに
対する下水汚泥焼却灰の混合割合は、得られるセメント
中のＰ2Ｏ5含有量が２．０重量％程度以下となるような
量とするのが好ましく、通常の場合、セメントクリンカ
ー１ｔに対して下水汚泥焼却灰３００ｋｇ程度以下であ
る。下水汚泥及び／又はその焼却灰の供給場所は、原料
ドライヤー、原料ミル、プレヒーターなど、キルンより
前の工程であればよい。When the hydraulic material of the present invention is used as a raw material for cement, the cement may be produced in the following manner according to the method for producing cement of the present invention. That is, sewage sludge and / or sewage sludge and / or limestone, clay, quartzite, iron raw materials, etc.
Or by mixing the incinerated ash and the fluorine compound to 1300
The mixture is calcined at 1450 ° C., and gypsum dihydrate is added, mixed and finely ground. In this case, the added amount of fluorine compound, 5 to 50 wt% in terms of F amount (vs. P 2 O 5), preferably 20 to 40 wt%. The mixing ratio of the sewage sludge incineration ash to the cement clinker is preferably set to an amount such that the P 2 O 5 content in the obtained cement is about 2.0% by weight or less. On the other hand, sewage sludge incineration ash is about 300 kg or less. The supply location of the sewage sludge and / or its incinerated ash may be any step before the kiln, such as a raw material dryer, a raw material mill, a preheater, or the like.
【００１９】なお、二水石膏の添加量は得られるセメン
ト中の二水石膏由来のＳＯ3量が１．０〜１．５重量％
程度とするのが好ましい。The amount of gypsum added is 1.0 to 1.5% by weight of the amount of SO 3 derived from gypsum in the resulting cement.
It is preferable to set the degree.
【００２０】[0020]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【００２１】実施例１〜８ 下水処理場の石灰塩鉄法による汚泥を７００℃で焼成し
て得られた表１に示す化学分析値の下水汚泥焼却灰に、
フッ化カルシウムをＦ換算添加量（対Ｐ2Ｏ5）で４重量
％となるように添加した後、表１に示す温度でそれぞれ
１時間加熱し、次いで、硬石膏を得られる固化材中の硬
石膏由来のＳＯ3含有量が８．０重量％となるように添
加して、ボールミルでブレーン値約４０００ｃｍ2／ｇ
に微粉砕したものを固化材として固化試験を実施した。Examples 1 to 8 The sewage sludge incineration ash of the chemical analysis values shown in Table 1 obtained by firing sludge by the lime-salt iron method at a sewage treatment plant at 700 ° C.
Calcium fluoride was added so as to be 4% by weight in terms of F (based on P 2 O 5 ), and then heated at the temperatures shown in Table 1 for 1 hour, and then anhydrite was obtained in the solidified material. It was added so that the SO 3 content derived from anhydrite would be 8.0% by weight, and a Blaine value of about 4000 cm 2 / g was obtained by a ball mill.
A solidification test was performed using the finely ground material as a solidifying material.
【００２２】対象土には浚渫土（ｗ（固形分に対する水
分割合）＝８５．４％、ρｔ（嵩密度）＝１．５００ｇ
／ｃｍ3）及び加水した関東ローム（ｗ＝１８０％、ρ
ｔ＝１．２７４ｇ／ｃｍ3）を用い、対象土に対する固
化材の添加量は表２に示す量とした。The target soil is dredged soil (w (moisture ratio to solid content) = 85.4%, ρt (bulk density) = 1.500 g)
/ Cm 3 ) and hydrated Kanto loam (w = 180%, ρ
t = 1.274 g / cm 3 ), and the amount of the solidifying material added to the target soil was as shown in Table 2.
【００２３】固化試験結果を表２に示す。Table 2 shows the results of the solidification test.
【００２４】[0024]
【表１】 [Table 1]
【００２５】比較例１〜４ 実施例１，２及び実施例５，６において、フッ化カルシ
ウムを添加しなかったこと以外は同様にして固化試験を
行い、結果を表２に示した。Comparative Examples 1-4 Solidification tests were conducted in the same manner as in Examples 1 and 2, and Examples 5 and 6 except that calcium fluoride was not added. The results are shown in Table 2.
【００２６】[0026]
【表２】 [Table 2]
【００２７】実施例９ 実施例６において、フッ化カルシウムと共に、石灰石を
ＣａＯ添加量（対Ｐ2Ｏ5）が１８０重量％となるように
添加したこと以外は同様にして固化材を製造し、同様に
して固化試験を行って、結果を表３に示した。Example 9 A solidified material was produced in the same manner as in Example 6, except that limestone was added together with calcium fluoride so that the CaO addition amount (based on P 2 O 5 ) was 180% by weight. A solidification test was performed in the same manner, and the results are shown in Table 3.
【００２８】比較例５ 実施例９において、フッ化カルシウムを添加しなかった
こと以外は同様にして固化試験を行って、結果を表３に
示した。Comparative Example 5 A solidification test was conducted in the same manner as in Example 9 except that calcium fluoride was not added, and the results are shown in Table 3.
【００２９】[0029]
【表３】 [Table 3]
【００３０】実施例１０ 下記配合の普通ポルトランドセメント用調合原料に下水
汚泥焼却灰及びフッ化カルシウムをクリンカー１ｔ当た
りそれぞれ１００ｋｇ及び７．０ｋｇ混合して（このフ
ッ化カルシウムの混合割合はＦ換算添加量（対Ｐ2Ｏ5）
で３８重量％である。）、１４００℃の電気炉で焼成
し、Ｐ2Ｏ5含有量が０．６５重量％のクリンカー混合物
を試製した。Example 10 100 kg and 7.0 kg of sewage sludge incineration ash and calcium fluoride were mixed per 1 ton of clinker with the prepared raw material for ordinary Portland cement having the following composition, respectively. (Vs. P 2 O 5 )
Is 38% by weight. The mixture was fired in an electric furnace at 1400 ° C. to produce a clinker mixture having a P 2 O 5 content of 0.65% by weight.
【００３１】［調合原料配合（ｋｇ／ｔ−クリンカ
ー）］ 石灰石：１２３９ 粘 土：１７９ 珪 石：１１３ 鉄原料：１５ これに二水石膏を得られるセメント中の二水石膏由来の
ＳＯ3量が１．５重量％となるように添加して、テスト
ミルで微粉砕してセメントを得た。[Formulation raw material mixture (kg / t-clinker)] Limestone: 1239 Clay: 179 Silica: 113 Iron raw material: 15 The amount of SO 3 derived from gypsum in the cement from which gypsum is obtained is calculated. It was added to 1.5 wt% and pulverized with a test mill to obtain cement.
【００３２】このセメントのＪＩＳによる物理試験結果
を表４に示す。Table 4 shows the physical test results of this cement according to JIS.
【００３３】比較例６ 実施例１０において、フッ化カルシウムを添加しなかっ
たこと以外は同様にして物理試験を行い、結果を表４に
示した。Comparative Example 6 A physical test was performed in the same manner as in Example 10 except that calcium fluoride was not added. The results are shown in Table 4.
【００３４】[0034]
【表４】 [Table 4]
【００３５】[0035]
【発明の効果】以上詳述した通り、本発明の方法によれ
ば、下水汚泥及び／又はその焼却灰を用いて地盤改良用
の固化材やセメント原料等として有用な水硬性材料を製
造することができる。As described in detail above, according to the method of the present invention, it is possible to produce a hydraulic material useful as a solidifying material for ground improvement or a cement raw material using sewage sludge and / or its incinerated ash. Can be.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｃ０９Ｋ 103:00 (72)発明者 森田 浩一郎 埼玉県大宮市北袋町１丁目297番地 三菱 マテリアル株式会社セメント研究所内 (72)発明者 塚田 匠 埼玉県大宮市北袋町１丁目297番地 三菱 マテリアル株式会社セメント研究所内 Ｆターム(参考） 4H026 CA01 CA02 CA06 CB03 Continuation of the front page (51) Int.Cl. 7 Identification FI FI Theme Court II (Reference) // C09K 103: 00 (72) Inventor Koichiro Morita 1-297 Kitabukurocho, Omiya-shi, Saitama Mitsubishi Materials Corporation Cement Research Institute (72) Inventor Takumi Tsukada 1-297 Kitabukuro-cho, Omiya-shi, Saitama F-term in Cement Research Laboratory, Mitsubishi Materials Corporation (reference) 4H026 CA01 CA02 CA06 CA06 CB03
Claims (3)
化合物を該下水汚泥焼却灰中のＰ2Ｏ5含有量（未焼却の
下水汚泥の場合は焼却灰に換算した場合のＰ2Ｏ5含有
量）に対してＦ換算で３〜１５重量％添加した後、１０
００〜１３００℃で焼成することを特徴とする水硬性材
料の製造方法。A fluorine compound is added to sewage sludge and / or its incinerated ash, and the P 2 O 5 content in the sewage sludge incinerated ash (P 2 O 5 when converted to incinerated ash in the case of unincinerated sewage sludge) After adding 3 to 15% by weight in terms of F with respect to
A method for producing a hydraulic material, characterized by firing at 00 to 1300 ° C.
化合物を該下水汚泥焼却灰中のＰ2Ｏ5含有量（未焼却の
下水汚泥の場合は焼却灰に換算した場合のＰ2Ｏ5含有
量）に対して、Ｆ換算で３〜１５重量％添加すると共
に、カルシウム化合物を該下水汚泥焼却灰中のＰ2Ｏ5含
有量に対してＣａＯ添加量で１００〜５００重量％とな
るように添加した後、１０００〜１３００℃で焼成する
ことを特徴とする水硬性材料の製造方法。 2. The content of P 2 O 5 in the sewage sludge incinerated ash (P 2 O 5 when converted to incinerated ash in the case of unincinerated sewage sludge). relative to the content), with the addition of 3-15 wt% in terms of F, so as to be 100 to 500% by weight CaO addition amount of calcium compound to a P 2 O 5 content of the lower water sludge incineration ash And baking at 1000 to 1300 ° C. after the addition.
はその焼却灰と、該下水汚泥焼却灰中のＰ2Ｏ5含有量
（未焼却の下水汚泥の場合は焼却灰に換算した場合のＰ
2Ｏ5含有量）に対してＦ換算で５〜５０重量％のフッ素
化合物とを混合して焼成することを特徴とするセメント
の製造方法。3. The sewage sludge and / or its incineration ash and the P 2 O 5 content in the sewage sludge incineration ash (P in the case of unincinerated sewage sludge converted to incineration ash)
A method for producing cement, comprising mixing and firing 5 to 50% by weight of a fluorine compound in terms of F with respect to 2 O 5 content).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10165313A JP2000001348A (en) | 1998-06-12 | 1998-06-12 | Production of hydraulic material and cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10165313A JP2000001348A (en) | 1998-06-12 | 1998-06-12 | Production of hydraulic material and cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000001348A true JP2000001348A (en) | 2000-01-07 |
Family
ID=15809968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10165313A Withdrawn JP2000001348A (en) | 1998-06-12 | 1998-06-12 | Production of hydraulic material and cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000001348A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009003490A1 (en) * | 2007-07-03 | 2009-01-08 | Aalborg Portland A/S | Method for increasing the reflectance of cement |
-
1998
- 1998-06-12 JP JP10165313A patent/JP2000001348A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009003490A1 (en) * | 2007-07-03 | 2009-01-08 | Aalborg Portland A/S | Method for increasing the reflectance of cement |
| EP2017238A1 (en) * | 2007-07-03 | 2009-01-21 | Aalborg Portland A/S | Method for increasing the reflectance of cement |
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