JP2672008B2 - Method for producing cement expansion material - Google Patents
Method for producing cement expansion materialInfo
- Publication number
- JP2672008B2 JP2672008B2 JP1040205A JP4020589A JP2672008B2 JP 2672008 B2 JP2672008 B2 JP 2672008B2 JP 1040205 A JP1040205 A JP 1040205A JP 4020589 A JP4020589 A JP 4020589A JP 2672008 B2 JP2672008 B2 JP 2672008B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- granulation
- producing
- calcium
- weight
- 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 - Fee Related
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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明はセメント膨張材の製造方法、詳しくは、原料
を造粒し、焼成してなるセメント膨張材の製造方法に関
する。その目的とするところは、ロータリーキルンの連
続操業期間を延長することにある。TECHNICAL FIELD The present invention relates to a method for producing a cement expansive material, and more particularly, to a method for producing a cement expansive material obtained by granulating raw materials and firing. The purpose is to extend the continuous operation period of the rotary kiln.
〈従来の技術とその課題〉 カルシウムサルホアルミネート系のセメント膨張材と
は、CaO、Al2O3及びCaSO4からなるセメント膨張材であ
って、3CaO・3Al2O3・CaSO4及び遊離のCaOや遊離のCaSO
4を主成分とするものである。The <Prior Art and Its Problems> cement expansive calcium sulfoaluminate based, CaO, a cement expanding material made of Al 2 O 3 and CaSO 4, of 3CaO · 3Al 2 O 3 · CaSO 4 , and the free CaO and free CaSO
It is mainly composed of 4 .
従来、カルシウムサルホアルミネート系のセメント膨
張材の製造方法としては石灰質原料、アルミナ質原料及
びセッコウ原料を配合し、製造されてきた。Heretofore, as a method for producing a calcium sulfaluminate-based cement expansive material, a calcareous raw material, an aluminous raw material and a gypsum raw material have been blended and produced.
一方これら原料は粉砕時そのままでは粉砕しにくく、
例えば、40重量％程度の水を加えて、湿式で粉砕せざる
をえなかった。そのためカルシウムサルホアルミネート
系のセメント膨張材の製造も、例えば、水分を約40重量
％程度含んだスラリー状のこれら原料を使用し、湿式で
計量し、混合し、キルンなどに投入して、焼成されてい
た。投入された原料はキルンの乾燥・溶融・焼成区間を
通過してカルシウムサルホアルミネート系のセメント膨
張材として製造されてきた（特開昭51−22013号公
報）。しかしながら、カルシウムサルホアルミネート系
のセメント膨張材を得るための焼成条件では、キルン内
壁に溶融成分が付着し、リングとなるため連続操業がで
きず、生成したリングを取り除くためキルンを停止し、
数日をかけてキルン内を掃除せざるをえないのが現状
で、長期の連続操業は不可能であった。そして、リング
の生成予防のため低温で焼成することも、提案された
が、低温で焼成するとカルシウムサルホアルミネートの
生成量が必要量以下に減少し、目的とするセメント膨張
材を製造することができない課題があった。On the other hand, it is difficult to crush these raw materials as they are,
For example, about 40% by weight of water was added and it had to be pulverized by a wet method. Therefore, for the production of calcium sulfaluminate-based cement expanders, for example, these raw materials in the form of slurries containing about 40% by weight of water are used, weighed, mixed, put into a kiln, etc., and fired. It had been. The fed raw material has been manufactured as a calcium sulfaluminate-based cement expansive material by passing through the drying, melting and firing sections of the kiln (JP-A-51-22013). However, under the firing conditions for obtaining a calcium sulfaluminate-based cement expansive material, the molten component adheres to the inner wall of the kiln, and a continuous operation cannot be performed because it becomes a ring, and the kiln is stopped to remove the produced ring,
Under the present circumstances, it was necessary to clean the inside of the kiln over several days, and continuous operation for a long period was impossible. Then, it was also proposed to fire at a low temperature to prevent the formation of rings, but when fired at a low temperature, the production amount of calcium sulfaluminate is reduced to a necessary amount or less, and the desired cement expansive material can be produced. There was a task I could not do.
一方、リングを生成することなく、必要量のカルシウ
ムサルホアルミネート系のセメント膨張材の製造方法と
して、発熱体を使用した電気炉による方法が提案されて
いるが、大量生産が困難であり、工業的には実施される
には至っていない。On the other hand, as a method for producing a required amount of calcium sulfaluminate-based cement expansive material without producing a ring, a method using an electric furnace using a heating element has been proposed, but it is difficult to mass-produce it. Has not yet been implemented.
本発明者らはこのような従来の技術の課題を解決すべ
く種々検討した結果、原料を造粒することにより上記課
題が解消できる知見を得て本発明を完成するに至った。As a result of various studies to solve the problems of the conventional techniques, the present inventors have completed the present invention by finding that the above problems can be solved by granulating a raw material.
〈課題を解決するための手段〉 即ち、本発明は石灰質原料、アルミナ質原料及びセッ
コウ原料を配合し、造粒し、焼成することを特徴とする
カルシウムサルホアルミネート系のセメント膨張材の製
造方法であり、一次造粒後、更に、溶融しない原料で被
覆し、二次造粒して焼成することを特徴とするカルシウ
ムサルホアルミネート系のセメント膨張材の製造方法で
ある。<Means for Solving the Problem> That is, the present invention is a method for producing a calcium sulfaluminate-based cement expansive material, characterized in that a calcareous raw material, an aluminous raw material and a gypsum raw material are blended, granulated and fired. The method for producing a calcium sulfaluminate-based cement expansive material is characterized in that after primary granulation, it is further coated with a non-melting raw material, secondary granulated and fired.
以下、本発明を詳しく説明する。 Hereinafter, the present invention will be described in detail.
石灰質原料（以下CaO原料という）としては、通常の
原料、例えば、石灰石、生石灰及び消石灰などが使用で
きる。As the calcareous raw material (hereinafter referred to as CaO raw material), usual raw materials such as limestone, quick lime and slaked lime can be used.
CaO原料の粒度は、特に限定されることはないが、150
μｍ以下が好ましい。The particle size of the CaO raw material is not particularly limited, but is 150
μm or less is preferred.
アルミナ質原料（以下Al2O3原料という）としては、
通常の原料、例えば、ボーキサイトやアルミ残灰などが
使用できる。As an alumina-based raw material (hereinafter referred to as Al 2 O 3 raw material),
Usual raw materials such as bauxite and aluminum residual ash can be used.
Al2O3原料の粒度は、特に限定されることはないが、1
50μｍ以下が好ましい。The particle size of the Al 2 O 3 raw material is not particularly limited, but 1
It is preferably 50 μm or less.
セッコウ原料（以下CS原料という）としては、二水・
半水・無水などの化学セッコウや天然セッコウなどが使
用できる。As gypsum raw material (hereinafter referred to as CS raw material),
Chemical gypsum such as semi-water / anhydrous and natural gypsum can be used.
CS原料の粒度は、特に限定されることはないが、150
μｍ以下が好ましい。Although the particle size of the CS raw material is not particularly limited, it is 150
μm or less is preferred.
各原料の混合方法は、特に限定されるものではなく、
従来の湿式混合や通常の乾式混合のいずれも可能であ
る。The mixing method of each raw material is not particularly limited,
Both conventional wet mixing and normal dry mixing are possible.
湿式混合した原料は、例えば、押出機、ペレタイザー
及びマルメライザーなどの造粒機が使用でき、乾式混合
した原料は、例えば、深江工業社製、商品名「ハイスピ
ードミキサー」、パン型造粒機及び整粒機などの造粒機
が使用できる。造粒時の水分量は10〜20重量％が好まし
く、15重量％が特に好ましい。水分量がこの範囲外では
造粒が困難である。The wet-mixed raw materials can be used, for example, granulators such as extruders, pelletizers and mulmelizers, and the dry-mixed raw materials are, for example, Fukae Kogyo Co., Ltd., trade name "High Speed Mixer", bread type granulator. And a granulator such as a granulator can be used. The water content during granulation is preferably 10 to 20% by weight, and particularly preferably 15% by weight. Granulation is difficult when the water content is outside this range.
造粒時間や造粒圧等の造粒条件は、造粒形式、造粒機
の種類及び造粒の規模等によって、変化するので、限定
することはむずかしい。Granulation conditions such as granulation time and granulation pressure vary depending on the granulation type, the type of granulator, the scale of granulation, and the like, so it is difficult to limit the granulation conditions.
カルシウムサルホアルミネート系のセメント膨張材の
原料の内、例えば、3CaO・3Al2O3・CaSO4（以下アウイ
ンという）、石灰・アルミナ質系原料及び石灰・セッコ
ウ質系原料等の、表面が溶融しない原料（以下二次原料
という）を除いた原料で造粒（以下一次造粒という）
し、そのあと、二次原料、で被覆し、二次造粒する。二
次原料の使用量は全原料の50重量％以下が好ましい。Of the calcium sulphoaluminate-based cement expansion materials, for example, the surface of 3CaO / 3Al 2 O 3 CaSO 4 (henceforth referred to as awin), lime / alumina-based materials and lime / gypsum-based materials is melted. Granulation with raw materials (hereinafter referred to as primary granulation) excluding raw materials (hereinafter referred to as secondary granulation)
Then, it is coated with a secondary raw material and secondary granulated. The amount of the secondary raw material used is preferably 50% by weight or less of the total raw material.
造粒形状はキルン内で容易に移動できる形状であれ
ば、とくに限定されるものではない。通常は球状のもの
が用いられる。The granulation shape is not particularly limited as long as it can be easily moved in the kiln. Usually, a spherical one is used.
造粒した原料を、予め予備加熱しておくことは形状保
存の面から好ましい。Preheating the granulated raw material in advance is preferable from the viewpoint of shape preservation.
造粒品は取り扱いが充分可能な強度が得られるように
焼成する。The granulated product is fired so as to obtain a strength that can be handled sufficiently.
焼成は1,200〜1,300℃で、30分〜１時間行うことが好
ましい。The firing is preferably performed at 1,200 to 1,300 ° C. for 30 minutes to 1 hour.
〈実施例〉 以下、実施例に基づいて、本発明を更に詳しく説明す
る。<Example> Hereinafter, the present invention will be described in more detail based on Examples.
実施例1. 石灰石、アルミ残灰及びセッコウの水分40重量％スラ
リーを、CaO:Al2O3:CaSO4の重量比が3:1:4の割合になる
ように配合し、混合原料を得た。この原料を水分15重量
％スラリーになるように、フイルタープレスし、一次造
粒し、更にその表面にアウインを混合原料とアウインの
合計の20重量％被覆して二次造粒を行った。Example 1. 40 wt% water slurry of limestone, aluminum residual ash and gypsum was blended so that the weight ratio of CaO: Al 2 O 3 : CaSO 4 was 3: 1: 4 to obtain a mixed raw material. It was This raw material was filter-pressed so that the water content became a slurry of 15% by weight, primary granulation was carried out, and then the surface thereof was coated with auine in an amount of 20% by weight of the total of the mixed raw material and auine to carry out a secondary granulation.
ロータリーキルンにこの造粒品を供給して、1,300℃
で１時間焼成した。その結果、従来法では操業日数５日
でキルンにリングが生成したが、本発明法では、操業日
数20日でもリングが生成しなかった。Supply this granulated product to the rotary kiln and keep it at 1,300 ℃
It was baked for 1 hour. As a result, in the conventional method, a ring was formed in the kiln after 5 days of operation, but in the method of the present invention, no ring was formed even after 20 days of operation.
焼成後に、88μ全通に混合粉砕し、この混合粉砕物を
セメント100重量部に対し13重量部混合し、JISR5201に
準じて作成したモルタルを４×４×16cmの型枠に入れ、
１日で脱型し、その時の長さを基長とし、20℃水中養生
におけるモルタル膨張率を測定した。その結果を第１表
に示す。比較として従来法で製造した市販品 商品名
「デンカCSA＃20」（電気化学工業製）を従来品として
用いた。After firing, mix and pulverize to 88μ all the way, mix 13 parts by weight of this mixed pulverized product to 100 parts by weight of cement, put the mortar created according to JIS R5201 in a 4 × 4 × 16 cm mold,
The mold was removed in 1 day, and the length at that time was used as the base length, and the mortar expansion rate during curing at 20 ° C in water was measured. Table 1 shows the results. For comparison, a commercial product manufactured by the conventional method, "DENKA CSA # 20" (manufactured by Denki Kagaku Kogyo) was used as the conventional product.
第１表から明らかなように、膨張性においても、本発
明法で製造したカルシウムサルホアルミネート系のセメ
ント膨張材は、従来品より優れていることがわかる。 As is clear from Table 1, the expansiveness of the calcium sulfaluminate-based cement expansive material produced by the method of the present invention is superior to that of conventional products.
〈発明の効果〉 本発明法によれば、従来法に比較して、連続操業を可
能にすると共に、膨張性においても従来品より優れてい
る効果を奏するものである。<Effects of the Invention> According to the method of the present invention, compared to the conventional method, continuous operation is possible, and in addition, the expandability is superior to the conventional method.
Claims (2)
原料を配合し、造粒し、焼成することを特徴とするカル
シウムサルホアルミネート系のセメント膨張材の製造方
法。1. A method for producing a calcium sulfaluminate-based cement expansive material, which comprises mixing a calcareous raw material, an aluminous raw material and a gypsum raw material, granulating and firing.
しその後溶融しないCaO含有原料で被覆し、二次造粒し
て焼成することを特徴とするカルシウムサルホアルミネ
ート系のセメント膨張材の製造方法。2. A calcium sulphoaluminate-based cement characterized in that each raw material according to claim 1 is blended, primary granulated, then coated with a CaO-containing raw material that does not melt, secondary granulated and fired. Expansive material manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1040205A JP2672008B2 (en) | 1989-02-22 | 1989-02-22 | Method for producing cement expansion material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1040205A JP2672008B2 (en) | 1989-02-22 | 1989-02-22 | Method for producing cement expansion material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02221141A JPH02221141A (en) | 1990-09-04 |
| JP2672008B2 true JP2672008B2 (en) | 1997-11-05 |
Family
ID=12574280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1040205A Expired - Fee Related JP2672008B2 (en) | 1989-02-22 | 1989-02-22 | Method for producing cement expansion material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2672008B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101147634B1 (en) | 2011-08-10 | 2012-05-23 | 한국지질자원연구원 | The mixing method of waste raw materials for manufacturing the calcium sulfoaluminate belended cement in the cao-al2o3-sio2-so3-fe2o3 system |
| CN103796968A (en) * | 2011-09-14 | 2014-05-14 | 电气化学工业株式会社 | Lime slurry and clinker production method using same |
-
1989
- 1989-02-22 JP JP1040205A patent/JP2672008B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101147634B1 (en) | 2011-08-10 | 2012-05-23 | 한국지질자원연구원 | The mixing method of waste raw materials for manufacturing the calcium sulfoaluminate belended cement in the cao-al2o3-sio2-so3-fe2o3 system |
| CN103796968A (en) * | 2011-09-14 | 2014-05-14 | 电气化学工业株式会社 | Lime slurry and clinker production method using same |
| CN103796968B (en) * | 2011-09-14 | 2016-04-13 | 电化株式会社 | Lime white and employ its manufacture method of grog |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02221141A (en) | 1990-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4789466B2 (en) | Rapidly setting cement composition | |
| TWI567048B (en) | A method for producing a cement composition | |
| US3066031A (en) | Cementitious material and method of preparation thereof | |
| US4772330A (en) | Process for producing low water-absorption artificial lightweight aggregate | |
| US2478757A (en) | Process of producing lightweight aggregates | |
| SE8800840D0 (en) | METHOD OF CEMENT MANUFACTURING | |
| JP2672008B2 (en) | Method for producing cement expansion material | |
| NO332695B1 (en) | Porosity forming, solidification accelerating binder additive and method of preparation thereof | |
| JPS5927734B2 (en) | Cement manufacturing method | |
| US2302988A (en) | Brick and process of manufacturing same | |
| KR101781108B1 (en) | Crack retardant mixture using lime type Expansive admixture | |
| JP2002068740A (en) | Method for manufacturing anhydrous gypsum for cement composition from gypsum waste material | |
| JP4070024B2 (en) | Non-dust solidifying material and method for producing the same | |
| Chesley et al. | A two-stage reaction sequence for C3S formation | |
| US1744547A (en) | osi dessatt | |
| SU1655957A1 (en) | Process for producing concrete products | |
| US138770A (en) | William b | |
| US1095180A (en) | Process of making a cementitious composition. | |
| JP2000319052A (en) | Artificial aggregate and its production | |
| JP2503233B2 (en) | Quick-setting material for spraying | |
| JP4948724B2 (en) | Non-fired cement cured body and method for producing the same | |
| US1851844A (en) | Process of preserving caustic materials | |
| US582068A (en) | Hydraulic cement | |
| US1305475A (en) | Samuel gerard mcanally | |
| US305754A (en) | Egbert w |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |