JP2862408B2 - Method for producing hydraulic product - Google Patents
Method for producing hydraulic productInfo
- Publication number
- JP2862408B2 JP2862408B2 JP3168007A JP16800791A JP2862408B2 JP 2862408 B2 JP2862408 B2 JP 2862408B2 JP 3168007 A JP3168007 A JP 3168007A JP 16800791 A JP16800791 A JP 16800791A JP 2862408 B2 JP2862408 B2 JP 2862408B2
- Authority
- JP
- Japan
- Prior art keywords
- sio
- product
- coal ash
- high temperature
- producing
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 12
- 239000010883 coal ash Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 239000002893 slag Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000004568 cement Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000010299 mechanically pulverizing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は建築土木工事等に適用さ
れる水硬性生成物、例えばセメントの製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a hydraulic product, for example, cement, which is applied to construction and civil engineering.
【０００２】[0002]
【従来の技術】従来のセメントの製造方法としては、原
料に硅石、石灰石等を使用して、機械的粉砕による方法
が行なわれている。2. Description of the Related Art As a conventional method for producing cement, a method of mechanically pulverizing silica, limestone or the like as a raw material has been used.
【０００３】[0003]
【発明が解決しようとする課題】従来技術には、原料
（硅石、粘土）を購入し、粉砕を行なわなければならな
いので、コストが高くなるという問題点がある。The prior art has a problem in that the raw materials (silica, clay) must be purchased and pulverized, which increases the cost.
【０００４】一方、産業用石炭焚ボイラにおいては、燃
焼後の石炭灰を埋め立て処分を行なっているが、用地確
保及び環境問題等で年々、困難になってきている。[0004] On the other hand, in industrial coal-fired boilers, burnt coal ash is landfilled and disposed, but it is becoming more and more difficult year by year due to land securing and environmental problems.
【０００５】本発明は上記技術水準に鑑み、不要成分で
ある石炭灰を利用して、セメントのような水硬性生成物
を製造する方法を提供しようとするものである。The present invention has been made in view of the above-mentioned state of the art, and aims to provide a method for producing a hydraulic product such as cement using coal ash which is an unnecessary component.
【０００６】[0006]
【課題を解決するための手段】本発明は石炭灰を高温条
件下で燃焼させてＳｉＯ2 を気化させ、該高温下の気化
ＳｉＯ2 に微細なＣａＯ又はＣａＣＯ3 粒子を反応さ
せ、生成物を冷却後捕集することを特徴とする水硬性生
成物の製造方法である。The present invention SUMMARY OF THE INVENTION The vaporizing SiO 2 by burning coal ash under high temperature conditions, reacting the fine CaO or CaCO 3 particles in the vaporization of SiO 2 under the high temperature, the product A method for producing a hydraulic product, which comprises collecting after cooling.
【０００７】本発明において、石炭灰を高温条件下で燃
焼させてＳｉＯ2 を気化させるに当っては、酸素富化空
気を用いた燃焼炉で２３００℃以上の高温状態にするこ
とが好ましい。In the present invention, in burning coal ash under high temperature conditions to vaporize SiO 2 , it is preferable to set the temperature to 2300 ° C. or higher in a combustion furnace using oxygen-enriched air.
【０００８】また、ＣａＯ又はＣａＣＯ3 粒子はその蒸
発・気化を促進するために、１０μｍ以下の粒度にする
ことが好ましい。The CaO or CaCO 3 particles preferably have a particle size of 10 μm or less in order to promote their evaporation and vaporization.
【０００９】[0009]
【作用】高温場に投入された石炭灰はＳｉＯ2 とＡｌ2
Ｏ3 に分離し、その分離されたＳｉＯ2 は同高温場に投
入された１０μｍ以下のＣａＯ又はＣａＣｏ3 と化合し
て、３ＣａＯ・ＳｉＯ2 （Ｃ3 Ｓと略記）、又は２Ｃａ
Ｏ・ＳｉＯ2 （Ｃ2 Ｓと略記）の水硬性組成物（ポルト
ランドセメント）になる。[Action] Coal ash introduced into a high temperature field is SiO 2 and Al 2
O 3, and the separated SiO 2 is combined with 10 μm or less of CaO or CaCo 3 introduced into the high-temperature field to form 3CaO · SiO 2 (abbreviated as C 3 S) or 2Ca
It becomes a hydraulic composition (Portland cement) of O.SiO 2 (abbreviated as C 2 S).
【００１０】この水硬性組成物でセメント成分全体の５
０％以上を占めるＣ3 Ｓは速硬性型セメントと言える。In this hydraulic composition, the total amount of cement components is 5%.
C 3 S occupying 0% or more can be said to be a quick-setting cement.
【００１１】[0011]
【実施例】本発明に係る実施例を図１によって説明す
る。酸素富化燃焼器８（以下、燃焼器という）は、上端
が排ガス管１に連通し、下端に燃焼器８の中心に向って
下方に傾斜する水冷管１８と耐火材１９で構成されるス
ラグタップ部４と、円筒状の水冷管３と、耐火材５等で
構成された本体と、同本体の上端近傍より石炭と酸化剤
（酸素、および空気）および石炭灰１０ａ，１０ｂをそ
れぞれ供給する複数個のバーナ１１ａ，１１ｂを有す
る。燃焼器８の下部スラグタップ部４には溶融スラグ６
が落下するように、炉中心部に排出孔２が穿設されてい
る。An embodiment according to the present invention will be described with reference to FIG. The oxygen-enriched combustor 8 (hereinafter, referred to as a combustor) has a slag composed of a water-cooled pipe 18 having an upper end communicating with the exhaust gas pipe 1 and a lower end inclined downward toward the center of the combustor 8, and a refractory material 19. A main body composed of a tap portion 4, a cylindrical water-cooled pipe 3, a refractory material 5, and the like, and coal, an oxidizing agent (oxygen and air), and coal ash 10a and 10b are supplied from near the upper end of the main body. It has a plurality of burners 11a and 11b. The molten slag 6 is provided in the lower slag tap portion 4 of the combustor 8.
A discharge hole 2 is drilled in the center of the furnace so that the gas falls.
【００１２】石炭と酸化剤および石炭灰１０ａ，１０ｂ
は燃焼器８内で燃焼し、２３００℃以上の高温となり、
石炭灰に含まれるＳｉＯ2 は気化する。気化したＳｉＯ
2 １２は排ガス管１の方に流れる。そこに投入された１
０μｍ以下のＣａＯ又はＣａＣＯ3 １３ａ，１３ｂはＳ
ｉＯ2 １２と反応し、エーライト３ＣａＯ・ＳｉＯ2 １
４となる。その後、冷却ガス１５ａ，１５ｂで冷却され
固化し、セメント１６となり、図示しないバグフィルタ
等で回収される。Coal and oxidizer and coal ash 10a, 10b
Burns in the combustor 8 and reaches a high temperature of 2300 ° C. or higher,
SiO 2 contained in coal ash is vaporized. Vaporized SiO
2 12 flows to the exhaust gas pipe 1. 1 put in there
CaO or CaCO 3 13a, 13b of 0 μm or less is S
Reacts with iO 2 12 and alite 3CaO · SiO 2 1
It becomes 4. Then, it is cooled and solidified by the cooling gas 15a, 15b to become cement 16, which is collected by a bag filter (not shown) or the like.
【００１３】下部スラグタップ部４より落下したスラグ
１７は図示しない水タンクにより急冷され非晶質の水砕
スラグとなり、粉砕されてコンクリート混和剤として使
用される。The slag 17 that has fallen from the lower slag tap portion 4 is rapidly cooled by a water tank (not shown) to become amorphous granulated slag, which is crushed and used as a concrete admixture.
【００１４】[0014]
【発明の効果】本発明により下記の効果が奏される。
石炭灰を使用することにより原料が安価になる。
スラグもコンクリート混和剤として使用することができ
るため、有効活用できる。 燃焼コントロールによ
り、シリカの混合比調整が可能である。 従来の粉砕
による方法より原料の粉砕、混合等が簡略化できる。
以上の効果によって製品の単価が安くなる。 石炭
灰の有効活用が計れる。The present invention has the following effects.
The use of coal ash makes the raw material cheaper.
Since slag can also be used as a concrete admixture, it can be used effectively. By controlling the combustion, the mixing ratio of silica can be adjusted. The pulverization and mixing of the raw materials can be simplified as compared with the conventional pulverization method.
Due to the above effects, the unit price of the product is reduced. Effective utilization of coal ash can be measured.
【図１】本発明の一実施例の説明図FIG. 1 is an explanatory diagram of an embodiment of the present invention.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 7/26 C04B 7/02Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) C04B 7/26 C04B 7/02
Claims (1)
2 を気化させ、該高温下の気化ＳｉＯ2 に微細なＣａＯ
又はＣａＣＯ3 粒子を反応させ、生成物を冷却後捕集す
ることを特徴とする水硬性生成物の製造方法。1. Coal ash is burned under high temperature conditions to produce SiO
2 is vaporized, and fine CaO is added to the vaporized SiO 2 under the high temperature.
Alternatively, a method for producing a hydraulic product, comprising reacting CaCO 3 particles, collecting the product after cooling, and collecting the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3168007A JP2862408B2 (en) | 1991-07-09 | 1991-07-09 | Method for producing hydraulic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3168007A JP2862408B2 (en) | 1991-07-09 | 1991-07-09 | Method for producing hydraulic product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0517184A JPH0517184A (en) | 1993-01-26 |
| JP2862408B2 true JP2862408B2 (en) | 1999-03-03 |
Family
ID=15860078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3168007A Expired - Fee Related JP2862408B2 (en) | 1991-07-09 | 1991-07-09 | Method for producing hydraulic product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2862408B2 (en) |
-
1991
- 1991-07-09 JP JP3168007A patent/JP2862408B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0517184A (en) | 1993-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19981110 |
|
| LAPS | Cancellation because of no payment of annual fees |