JP4084432B2 - Manufacturing method of inorganic material - Google Patents
Manufacturing method of inorganic material Download PDFInfo
- Publication number
- JP4084432B2 JP4084432B2 JP19137096A JP19137096A JP4084432B2 JP 4084432 B2 JP4084432 B2 JP 4084432B2 JP 19137096 A JP19137096 A JP 19137096A JP 19137096 A JP19137096 A JP 19137096A JP 4084432 B2 JP4084432 B2 JP 4084432B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- inorganic material
- electric furnace
- melt
- granulated
- 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 - Lifetime
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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
- 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
-
- 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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Processing Of Solid Wastes (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明はセメント等の水硬性材料に添加される細骨材に使用される無機材料の製造方法に関するものである。
【０００２】
【従来の技術】
電気炉還元スラグは遊離ＣａＯや遊離ＭｇＯを含み、経時的に空気中の水分と反応して膨張崩壊粉化する。そのために従来は還元スラグだけでは使用出来ず、酸化スラグと混合して仮設道路材、整地材等の土木用として使用されている。
【０００３】
【発明が解決しようとする課題】
上記したように従来では還元スラグだけでは使用出来ず、酸化スラグと混合して使用され、また用途も土木用として付加価値が低いものである。
【０００４】
【課題を解決するための手段】
本発明は上記課題を解決するための手段として、電気炉還元スラグを１５００℃以上の温度で加熱溶融処理し、該スラグ溶融物を高速回転する羽根付きドラムに注入し破砕粒状化し、上記粒状化した該溶融物を水ミスト雰囲気中で急冷固化して無機材料である細骨材を製造する無機材料の製造方法を提供するものである。
また本発明においては、電気炉還元スラグと電気炉酸化スラグとの混合物を１５００℃以上の温度で加熱溶融処理し、該スラグ溶融物を高速回転する羽根付きドラムに注入し破砕粒状化し、上記粒状化した該溶融物を水ミスト雰囲気中で急冷固化して無機材料である細骨材を製造する無機材料の製造方法も提供される。
本発明を以下に詳細に説明する。
【０００５】
本発明の無機材料を製造するには、図１に示すように電気炉還元スラグ(1) を電気炉(2) に投入し、電極(3) に通電して該スラグ(1) を１５００℃以上、望ましくは１５３０℃以上に加熱処理する。加熱処理中所望なればランス管(4) から空気を吹込んでもよい。
上記加熱処理により遊離ＣａＯおよび遊離ＭｇＯはスラグ中に含まれるシリカ分等と反応して含有率が大巾に低下し、また粘性も低下する。
更に該スラグ溶融物は急冷固化されるが、急冷によりスラグ中のガラス成分のガラス化が促進されて不安定な成分がなくなり、水分との反応による膨張崩壊粉化が起らない無機材料が得られる。
【０００６】
上記スラグ溶融物を急冷粒化して細骨材を製造するには、通常該スラグの溶融物を高速回転する羽根付きドラムに注入し、該溶融物を該羽根付きドラムによって破砕粒状化し、粒状化した該溶融物を水ミスト雰囲気中で急冷処理する方法が採られる。該羽根付きドラムは複数個配置して複数段の破砕粒状化を行なってもよい。
このようにして得られる骨材は通常５mm以下の粒径を有し細骨材に分類され、比重が１．６〜１．９で天然骨材と比べると軽量であり、粒径２．５mm以下のものは略球状であり、粒度分布はＪＩＳ−Ａ５００５コンクリート用砕砂の規格範囲にある。
【０００７】
該還元スラグ(1) を電気炉(2) において加熱処理する際、酸化スラグを混合するとより安定な組成が得られ、上記急冷粒化により表面に微細な凹凸を有する球状の優れた細骨材が製造される。還元スラグと酸化スラグとの混合比は１：２〜１：４程度とする。
【０００８】
削除
【０００９】
【発明の実施の形態】
〔実施例〕
電気炉還元スラグ(1) は図１に示す電気炉(2) において加熱され、スラグ溶融物(1A)の温度が１６００℃に達した時加熱を止め、上記加熱処理されたスラグ溶融物(1A)は図２に示すように取鍋(5) からシューター(6) に移し、該シューター(6) から高速回転する羽根付きドラム(7,8) に注入する。該スラグ溶融物(1A)は該羽根付きドラム(7,8) によって細破砕されて粒状化し、該電気炉スラグ溶融物(1A)の粒化物(1B)は急冷チャンバー(9) 内にスプレー装置(10)からスプレーされる水ミストによって急冷される。そしてこのようにして得られた細骨材(11)は備蓄容器(12)内に備蓄される。該細骨材(11)は略球状であり平均粒径が１．２mmである。
該細骨材(11)の組成、性状を以下に示す。
ＣａＯ ５５．５〜６０．５重量％
ＳｉＯ2 ２３．８〜２４．６ 〃
Ａｌ2 Ｏ3 ８．２〜１４．６ 〃
Ｆｅ2 Ｏ3 ０．３〜 ０．８ 〃
表乾比重 １．８６〜２．０７
絶乾比重 １．６８〜１．８４
吸水率 １０．９〜１２．５％
【００１０】
【発明の効果】
本発明では電気炉還元スラグの水分吸収による膨張崩壊粉化が防止され、セメント細骨材に有効利用することが可能になる。
【図面の簡単な説明】
【図１】電気炉説明図
【図２】骨材製造装置の説明図
【符号の説明】
1 電気炉還元スラグ
2 電気炉
11 細骨材（無機材料）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing an inorganic material used for a fine aggregate added to a hydraulic material such as cement.
[0002]
[Prior art]
The electric furnace reducing slag contains free CaO and free MgO, and reacts with moisture in the air with time to expand and collapse into powder. Therefore, conventionally, it cannot be used only with reduced slag, but is mixed with oxidized slag and used for civil engineering such as temporary road materials and leveling materials.
[0003]
[Problems to be solved by the invention]
As described above, conventionally, it cannot be used only with reduced slag, but it is used by mixing with oxidized slag, and the use is low for civil engineering.
[0004]
[Means for Solving the Problems]
As a means for solving the above-mentioned problems, the present invention heat-melts electric furnace reducing slag at a temperature of 1500 ° C. or higher, injects the slag melt into a bladed drum that rotates at high speed , crushes and granulates, The present invention provides a method for producing an inorganic material, in which the melt is rapidly cooled and solidified in a water mist atmosphere to produce a fine aggregate which is an inorganic material.
In the present invention, a mixture of electric furnace reducing slag and electric furnace oxidation slag is heated and melted at a temperature of 1500 ° C. or more, and the slag melt is poured into a bladed drum that rotates at high speed and crushed and granulated. There is also provided an inorganic material production method for producing a fine aggregate which is an inorganic material by rapidly solidifying the melted melt in a water mist atmosphere.
The present invention is described in detail below.
[0005]
In order to produce the inorganic material of the present invention, as shown in FIG. 1, the electric furnace reducing slag (1) is put into the electric furnace (2), the electrode (3) is energized and the slag (1) is heated to 1500 ° C. As described above, the heat treatment is desirably performed at 1530 ° C. or higher. If desired, air may be blown from the lance tube (4) during the heat treatment.
By the above heat treatment, free CaO and free MgO react with the silica content and the like contained in the slag, the content ratio is greatly reduced, and the viscosity is also reduced.
Furthermore, although the slag melt is rapidly cooled and solidified, the vitrification of the glass component in the slag is promoted by the rapid cooling to eliminate unstable components, and an inorganic material that does not cause expansion / collapse powdering due to reaction with moisture is obtained. It is done.
[0006]
In order to produce a fine aggregate by rapidly cooling the slag melt, the slag melt is usually poured into a bladed drum rotating at high speed, and the melt is crushed and granulated by the bladed drum and granulated. A method of rapidly cooling the melted product in a water mist atmosphere is employed. A plurality of bladed drums may be arranged to perform a plurality of stages of crushing and granulating.
Aggregates thus obtained usually have a particle size of 5 mm or less and are classified as fine aggregates, have a specific gravity of 1.6 to 1.9 and are lighter than natural aggregates, and have a particle size of 2.5 mm. The following are substantially spherical, and the particle size distribution is within the standard range of crushed sand for JIS-A5005 concrete.
[0007]
When the reduced slag (1) is heat-treated in the electric furnace (2), a more stable composition can be obtained by mixing the oxidized slag, and the spherical fine fine aggregate having fine irregularities on the surface due to the rapid cooling granulation. Is manufactured. The mixing ratio of reduced slag and oxidized slag is about 1: 2 to 1: 4.
[0008]
Delete [0009]
DETAILED DESCRIPTION OF THE INVENTION
〔Example〕
The electric furnace reducing slag (1) is heated in the electric furnace (2) shown in FIG. 1. When the temperature of the slag melt (1A) reaches 1600 ° C., the heating is stopped and the slag melt (1A ) Is transferred from the ladle (5) to the shooter (6) as shown in FIG. 2, and injected from the shooter (6) into the bladed drum (7, 8) rotating at high speed. The slag melt (1A) is crushed and granulated by the bladed drum (7, 8), and the granulated product (1B) of the electric furnace slag melt (1A) is sprayed into a quenching chamber (9). Quenched by water mist sprayed from (10). The fine aggregate (11) thus obtained is stored in the storage container (12). The fine aggregate (11) is substantially spherical and has an average particle size of 1.2 mm.
The composition and properties of the fine aggregate (11) are shown below.
CaO 55.5-60.5 wt%
SiO 2 23.8 to 24.6 〃
Al 2 O 3 8.2 to 14.6 〃
Fe 2 O 3 0.3-0.8 〃
Surface dry specific gravity 1.86 to 2.07
Absolutely dry specific gravity 1.68-1.84
Water absorption 10.9 ~ 12.5%
[0010]
【The invention's effect】
In the present invention, expansion / collapse pulverization due to moisture absorption of the electric furnace reducing slag is prevented, and it can be effectively used for cement fine aggregate .
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an electric furnace. FIG. 2 is an explanatory diagram of an aggregate manufacturing apparatus.
1 Electric furnace reducing slag
2 Electric furnace
11 Fine aggregate (inorganic material)
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19137096A JP4084432B2 (en) | 1996-07-01 | 1996-07-01 | Manufacturing method of inorganic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19137096A JP4084432B2 (en) | 1996-07-01 | 1996-07-01 | Manufacturing method of inorganic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1015522A JPH1015522A (en) | 1998-01-20 |
| JP4084432B2 true JP4084432B2 (en) | 2008-04-30 |
Family
ID=16273467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19137096A Expired - Lifetime JP4084432B2 (en) | 1996-07-01 | 1996-07-01 | Manufacturing method of inorganic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4084432B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100932590B1 (en) * | 2008-05-21 | 2009-12-21 | 신희동 | Inorganic cement clinker using slag of high temperature molten state and its manufacturing method and inorganic cement containing the clinker |
| KR101234787B1 (en) * | 2010-11-10 | 2013-02-20 | 주식회사 에코마이스터 | Ultra-fast hard hydraulic binder using reduced slag powder and its manufacturing method |
| JP2013071875A (en) * | 2011-09-28 | 2013-04-22 | Hoshino Sansho:Kk | Method for modifying electric arc furnace reducing slag |
-
1996
- 1996-07-01 JP JP19137096A patent/JP4084432B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1015522A (en) | 1998-01-20 |
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