JP2014189439A - Method for manufacturing cement clinker - Google Patents
Method for manufacturing cement clinker Download PDFInfo
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- JP2014189439A JP2014189439A JP2013066273A JP2013066273A JP2014189439A JP 2014189439 A JP2014189439 A JP 2014189439A JP 2013066273 A JP2013066273 A JP 2013066273A JP 2013066273 A JP2013066273 A JP 2013066273A JP 2014189439 A JP2014189439 A JP 2014189439A
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- coal ash
- clinker
- raw material
- cement clinker
- portland cement
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000004568 cement Substances 0.000 title claims description 23
- 238000000034 method Methods 0.000 title abstract description 14
- 239000010883 coal ash Substances 0.000 claims abstract description 41
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 239000011398 Portland cement Substances 0.000 claims abstract description 25
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 22
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 19
- 239000002699 waste material Substances 0.000 abstract description 14
- 239000000203 mixture Substances 0.000 abstract description 11
- 238000010304 firing Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000002893 slag Substances 0.000 description 7
- 239000006227 byproduct Substances 0.000 description 6
- 239000004927 clay Substances 0.000 description 6
- 238000001354 calcination Methods 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 238000010298 pulverizing process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000002916 wood waste Substances 0.000 description 1
Classifications
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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
- 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
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
本発明は、ポルトランドセメントクリンカーの製造方法に関わる。詳しくは、当該ポルトランドセメントクリンカーの製造に係るセメント調合原料およびその製造方法に関する。さらに詳しくは、セメントクリンカーの焼成性を向上させる調合原料およびその製造方法に関する。 The present invention relates to a method for producing a Portland cement clinker. In detail, it is related with the cement compounding raw material which concerns on manufacture of the said Portland cement clinker, and its manufacturing method. More specifically, the present invention relates to a blended raw material for improving the calcination property of a cement clinker and a method for producing the same.
セメント産業は、大量生産・大量消費型産業であり、省資源・省エネルギーは、これまでも、そしてこれからも最重要課題であり続けると考えられる。例えば、最も大量に製造されているポルトランドセメントを製造するためには、所定の化学組成に調製された原料を、１４００℃〜１５００℃もの高温で焼成してクリンカーとする必要があり、この温度を得るためのエネルギーコストは膨大なものとなる。 The cement industry is a mass-production / mass-consumption industry, and resource conservation and energy conservation are and will continue to be the most important issues. For example, in order to produce Portland cement, which is produced in the largest quantity, it is necessary to calcinate the raw material prepared in a predetermined chemical composition at a high temperature of 1400 ° C. to 1500 ° C. to obtain a clinker. The energy cost to obtain is enormous.
ポルトランドセメントは通常、ＣａＯ源として石灰石を用い、さらにＳｉＯ２源としてのケイ石、Ａｌ２Ｏ３源としての粘土、Ｆｅ２Ｏ３源としてのスラグなどを主原料として製造される。 Portland cement is usually produced using limestone as a CaO source, and further mainly using silica as an SiO 2 source, clay as an Al 2 O 3 source, slag as an Fe 2 O 3 source, and the like.
一方、近年の地球環境問題と関連して、廃棄物、副産物等の有効利用は重要な課題となっている。セメント産業、セメント製造設備の特徴を生かし、セメント製造時に原料や燃料として廃棄物を有効利用あるいは処理を行うことは、安全かつ大量処分が可能という観点から有効とされている。 On the other hand, in connection with recent global environmental problems, effective use of waste, by-products, etc. has become an important issue. Taking advantage of the characteristics of the cement industry and cement production facilities, it is considered effective from the viewpoint of safe and mass disposal to effectively use or treat waste as raw material or fuel during cement production.
大量生産・大量消費型産業であるセメント産業は、セメント製造時に原料や燃料として廃棄物を有効利用あるいは処理を行い、省資源・省エネルギーで効率よくセメントを製造することが重要とされている。 In the cement industry, which is a mass production and mass consumption type industry, it is important to efficiently use or treat waste as raw materials and fuels during cement production, and to efficiently produce cement with resource and energy savings.
廃棄物、副産物等の中で、都市ごみ焼却灰、発生土、高炉水砕スラグ、高炉徐冷スラグ、石炭灰等は、通常のセメントクリンカー組成に比べ、Ａｌ２Ｏ３含有量が多く、かつてのＡｌ２Ｏ３源として利用されていた粘土原料との置き換えの原料として有効利用されてきた。 Among wastes, by-products, municipal waste incineration ash, generated soil, blast furnace granulated slag, blast furnace slow-cooled slag, coal ash, etc. have a higher Al 2 O 3 content than ordinary cement clinker compositions. It has been effectively used as a raw material for replacing clay raw materials that have been used as Al 2 O 3 sources.
本発明は、このような廃棄物原料を原料の一部として用いるポルトランドセメントクリンカーの製造方法において、焼成性の良好なクリンカー原料を提供し、もってセメントの製造コストの削減を計るものである。 The present invention provides a clinker raw material with good calcinability in a method for producing a Portland cement clinker using such a waste raw material as a part of the raw material, thereby reducing the production cost of cement.
本発明者らは、上記課題を解決すべく鋭意研究を行なった。そして、様々な石炭灰の中に、Ａｌ２Ｏ３／ＳｉＯ２（質量比）が比較的低い、換言すればＳｉＯ２の割合が多いものもあることに着目した。そして、このような石炭灰であれば、粘土ばかりでなく、一般に焼成性の悪いケイ石の置き換え割合を上げることが可能となり、よって比較的焼成性よく、セメントクリンカーが得られるのではないかと考え、さらに検討を進めた結果、本発明を完成した。 The present inventors have intensively studied to solve the above problems. It was noted that some of the various coal ash has a relatively low Al 2 O 3 / SiO 2 (mass ratio), in other words, a high proportion of SiO 2 . And, with such coal ash, it is possible to increase the replacement ratio of not only clay but also generally poor calcite, so that a cement clinker can be obtained with relatively good calcination. As a result of further investigation, the present invention was completed.
即ち本発明は、石炭灰を原料の一部として用いるポルトランドセメントクリンカーの製造方法において、前記石炭灰として、Ａｌ２Ｏ３／ＳｉＯ２（質量比）が０．１〜０．５の石炭灰を用いることを特徴とするポルトランドセメントクリンカーの製造方法である。 当該石炭灰は、ＳｉＯ２含有量が６０質量％以上のものであることが好ましい。 That is, the present invention relates to a method for producing a Portland cement clinker using coal ash as a part of the raw material, and as the coal ash, coal ash having an Al 2 O 3 / SiO 2 (mass ratio) of 0.1 to 0.5 is used. It is the manufacturing method of the Portland cement clinker characterized by using. The coal ash preferably has a SiO 2 content of 60% by mass or more.
本発によれば、ポルトランドセメントクリンカーの原料として石炭灰を使用する際、Ａｌ２Ｏ３／ＳｉＯ２（質量比）が高い石炭灰を使用する場合に比して、０．１〜０．５の石炭灰を用いることで、焼成性を向上することができる。また、ＳｉＯ２源となるケイ石の使用比率を下げることができ、相対的に廃棄物使用量が増加する効果も得られる。 According to the present invention, when using coal ash as a raw material for Portland cement clinker, 0.1 to 0.5 compared to when using coal ash having a high Al 2 O 3 / SiO 2 (mass ratio). By using the coal ash, it is possible to improve the calcinability. Moreover, the use ratio of the silica as a SiO 2 source can be reduced, and an effect of relatively increasing the amount of waste used can be obtained.
ケイ石中のＳｉＯ２成分の多くが大きな結晶性のものであり、それゆえ焼成性が悪いのに対して、石炭灰中のＳｉＯ２成分は非晶質であったり、結晶質でも極めて微細な大きさであったりするために、焼成時に他の成分と反応しやすくなっており、上記効果が発現するものと考えられる。 Most of the SiO 2 components in silica are of large crystallinity and are therefore poor in calcination, whereas the SiO 2 component in coal ash is amorphous or very fine even in crystalline form. Because of its size, it tends to react with other components during firing, and the above effect is considered to be manifested.
本発明の製造方法においては、ポルトランドセメントクリンカーの原料の一部として石炭灰を使用する。そして、その石炭灰のＡｌ２Ｏ３／ＳｉＯ２（質量比）は０．１〜０．５の石炭灰でなくてはならない。この比率が小さいほどケイ石の多くを石炭灰に置き換えることが可能となり、焼成性の向上効果が大きいが、小さくなりすぎるとＡｌ２Ｏ３分が不足するため、別途Ａｌ２Ｏ３源を用意する必要が出てくる。入手の容易さなども考慮すると、０．３〜０．５が好ましい。 前述の通りＳｉＯ２源となるケイ石は、粘土等のＡｌ２Ｏ３源や鉄源等のＦｅ２Ｏ３源など原料と比較して、溶融しにくい。また、微量成分等の影響により異なることもあるが、一般的には、ＳｉＯ２を含むＡｌ２Ｏ３源となる石炭灰は、Ａｌ２Ｏ３／ＳｉＯ２（質量比）が小さい値を示すものが相対的に溶融し易い。 In the production method of the present invention, coal ash is used as a part of the raw material of the Portland cement clinker. Then, Al 2 O 3 / SiO 2 ( weight ratio) of the coal ash should be coal ash 0.1-0.5. The smaller this ratio, the more silica can be replaced with coal ash, and the effect of improving the calcination is large. However, if the ratio is too small, the Al 2 O 3 component is insufficient, so a separate Al 2 O 3 source is prepared. The need to come out. Considering availability, 0.3 to 0.5 is preferable. As described above, silica as a SiO 2 source is less likely to melt than raw materials such as an Al 2 O 3 source such as clay and an Fe 2 O 3 source such as iron source. Further, there is also vary due to the influence of such trace components, in general, coal ash to be Al 2 O 3 source containing SiO 2 is, Al 2 O 3 / SiO 2 ( weight ratio) shows a small value Things are relatively easy to melt.
Ａｌ２Ｏ３／ＳｉＯ２（質量比）が小さい値を示す石炭灰を用いることにより、上記ケイ石の使用割合を減らすことができ、よって、クリンカーの焼成性が向上する。 By using coal ash having a small value of Al 2 O 3 / SiO 2 (mass ratio), the use rate of the silica can be reduced, and thus the clinker firing property is improved.
本発明において用いる石炭灰は、産炭地や発生場所（火力発電所など）の異なる複数の石炭灰を混合して用いてもよい。この場合、複数の石炭灰の混合後のＡｌ２Ｏ３／ＳｉＯ２が０．１〜０．５の範囲にあればよい。 The coal ash used in the present invention may be a mixture of a plurality of coal ash having different coal production sites and generation locations (such as thermal power plants). In this case, the Al 2 O 3 / SiO 2 after mixing a plurality of coal ash may be in the range of 0.1 to 0.5.
本発明において、上記石炭灰の使用量は制限されるものではないが、従来の石炭灰を用いるよりも多量に使用できる傾向にあり、一般には製造されるクリンカー１トンあたり８０〜１４０ｋｇである。 In the present invention, the amount of coal ash used is not limited, but it tends to be used in a larger amount than conventional coal ash, and is generally 80 to 140 kg per ton of clinker produced.
本発明のポルトランドセメントクリンカーの製造方法における、上記石炭灰以外の原料は、公知の原料を用いることができる。即ち、石灰石、生石灰、消石灰等のＣａＯ源、ケイ石等のＳｉＯ２源、粘土等のＡｌ２Ｏ３源、スラグ等のＦｅ２Ｏ３源などである。また各種廃棄物、副産物等も使用可能である。上記の通り、本発明で規定する石炭灰を用いれば、同じ化学組成のクリンカーを得るために必要なケイ石量が低減出来、よって焼成性が向上する。 A known raw material can be used as the raw material other than the coal ash in the method for producing the Portland cement clinker of the present invention. That is, a CaO source such as limestone, quicklime and slaked lime, a SiO 2 source such as silica, an Al 2 O 3 source such as clay, and a Fe 2 O 3 source such as slag. Various wastes and by-products can also be used. As described above, when the coal ash defined in the present invention is used, the amount of silica required for obtaining the clinker having the same chemical composition can be reduced, and thus the calcination property is improved.
本発明の製造方法において、石炭灰以外の廃棄物、副産物等から一種以上のものを使用することは、廃棄物、副産物等の有効利用を促進する観点から好ましいことである。使用可能な廃棄物・副産物をより具体的に例示すると、高炉スラグ、製鋼スラグ、非鉄鉱滓、下水汚泥、浄水汚泥、製紙スラッジ、建設発生土、鋳物砂、ばいじん、焼却飛灰、溶融飛灰、塩素バイパスダスト、木屑、廃白土、ボタ、廃タイヤ、貝殻、都市ごみやその焼却灰等が挙げられる（なお、これらの中には、セメント原料になるとともに熱エネルギー源となるものもある）。 In the production method of the present invention, it is preferable to use one or more wastes, by-products and the like other than coal ash from the viewpoint of promoting effective utilization of wastes, by-products and the like. Specific examples of usable waste and by-products include blast furnace slag, steelmaking slag, nonferrous iron slag, sewage sludge, purified water sludge, papermaking sludge, construction generated soil, foundry sand, dust, incineration fly ash, molten fly ash, Chlorine bypass dust, wood waste, waste clay, waste, tires, shells, municipal waste and incinerated ash, etc. are included (some of them become cement raw materials and heat energy sources).
本発明のセメントクリンカーを製造する方法は特に限定されることがなく、上記セメントクリンカー原料を、公知のセメントクリンカーの鉱物比率及び係数となるように所定の割合で調製混合し、公知の方法（例えばボールミル、竪型ミル等）で所定の粉末度となるように原料を混合粉砕し、公知の方法（例えば、ＳＰキルンやＮＳＰキルン等）で焼成することにより容易に得ることができる。 The method for producing the cement clinker of the present invention is not particularly limited, and the above-mentioned cement clinker raw material is prepared and mixed at a predetermined ratio so as to have a mineral ratio and coefficient of a known cement clinker, and a known method (for example, It can be easily obtained by mixing and pulverizing the raw materials so as to have a predetermined fineness with a ball mill, a vertical mill, etc., and firing by a known method (for example, SP kiln or NSP kiln).
当該セメント原料の調製混合方法も公知の方法を適宜採用すればよい。例えば、事前に上記各種原料の化学組成を測定し、これら原料中の各成分割合から上記範囲になるように各原料の調合割合を計算し、その割合で原料を調合すればよい。 As a method for preparing and mixing the cement raw material, a known method may be appropriately employed. For example, the chemical composition of the above-mentioned various raw materials may be measured in advance, the blending ratio of each raw material may be calculated so as to be within the above range from the ratio of each component in these raw materials, and the raw material may be blended at that ratio.
原料の調合割合は、ポルトランドセメントクリンカーを生じる範囲であれば特に限定されず、普通ポルトランドセメント、中庸熱ポルトランドセメント、低熱ポルトランドセメント、早強ポルトランドセメントなど如何なるポルトランドセメントに対しても適用できるが、好ましくはＣ３Ｓ含有量が４０〜７５質量％、Ｃ２Ｓ含有量が５〜２５質量％、Ｃ３Ａ含有量が３〜１５質量％及びＣ４ＡＦ含有量が７ 〜２５質量％のものである。 The blending ratio of the raw materials is not particularly limited as long as it generates Portland cement clinker, and can be applied to any Portland cement such as ordinary Portland cement, moderately hot Portland cement, low heat Portland cement, early strength Portland cement, etc. ones of C 3 S content of 40 to 75 mass%, C 2 S content of 5 to 25 mass%, C 3 a content of 3-15% by weight and C 4 AF content 7-25 wt% It is.
本発明の製造方法において、各原料は個々に粉砕後混合しても良いし、混合後に粉砕してもよい。当該粉砕方法は、公知のポルトランドセメントクリンカー製造の際と同様のボールミル、竪型ミル等を使用することができ、特に限定はされないが、ボールミルが好ましい。粉砕に際しては通常、分級を行い望む範囲の粒度の混合原料を得る。当該分級についても公知の方法が適宜採用できる。 In the production method of the present invention, the respective raw materials may be individually pulverized and mixed, or may be pulverized after mixing. The pulverization method can use the same ball mill, vertical mill and the like as in the production of a known Portland cement clinker, and is not particularly limited, but a ball mill is preferred. In pulverization, classification is usually performed to obtain a mixed raw material having a desired particle size. A known method can be appropriately employed for the classification.
なお石炭灰は、もともと粉末状のものであるため、その混合は、他の原料の粉砕後の粉末に混合しても、他の原料の粉砕前に混合し、他の原料と同様に粉砕機を通しても良い。 Coal ash is originally in the form of powder, so even if it is mixed with the powder after pulverization of other raw materials, it is mixed before pulverization of other raw materials. You can pass through.
焼成方法も特に限定されず、既存のポルトランドセメント製造設備として知られるＮＳＰキルンや、ＳＰキルンに代表されるセメントキルン等の高温加熱が可能な装置が好適に使用できる。焼成温度は１４００〜１５００℃程度が通常である。 The firing method is not particularly limited, and an apparatus capable of high-temperature heating such as an NSP kiln known as an existing Portland cement manufacturing facility or a cement kiln represented by an SP kiln can be preferably used. The firing temperature is usually about 1400 to 1500 ° C.
本発明の方法で製造されたポルトランドセメントクリンカーは、公知のポルトランドセメントクリンカーと同様に使用することができる。即ち、石膏等と混合し、ブレーン比表面積が一定値以上になるまで粉砕すればよい。 The Portland cement clinker produced by the method of the present invention can be used in the same manner as known Portland cement clinker. That is, it may be mixed with gypsum or the like and pulverized until the Blaine specific surface area becomes a certain value or more.
以下、実施例により本発明をより具体的に説明するが、本発明はこの実施例に限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to this Example.
用いた石炭灰は、日本国内の火力発電所から排出されたものである。この石炭灰の化学組成およびＡｌ２Ｏ３／ＳｉＯ２（質量比）を以下の表１に示す。 The coal ash used was discharged from a thermal power plant in Japan. The chemical composition and Al 2 O 3 / SiO 2 (mass ratio) of the coal ash are shown in Table 1 below.
表１に示すそれぞれの石炭灰と石灰石、ケイ石および鉄原料の工業原料を用いて、焼成ベースで、汎用的なセメントクリンカー組成のクリンカーが得られるように原料を調合した。このときの各原料の調合割合を表２に示す。 Using each coal ash and industrial raw materials of limestone, silica and iron raw materials shown in Table 1, raw materials were prepared so as to obtain a clinker having a general-purpose cement clinker composition on a calcined base. The mixing ratio of each raw material at this time is shown in Table 2.
ＳｉＯ２成分を多く含有する石炭灰ＨＳを用いた場合、石炭灰や鉄原料に比べて相対的に溶融しにくいケイ石の調合割合を少なくすることができている。逆に石炭灰の調合割合は、一般的に溶融し易いＡｌ２Ｏ３／ＳｉＯ２（質量比）が小さい石炭灰ＨＳを用いた場合の方が、Ａｌ２Ｏ３／ＳｉＯ２（質量比）が大きい石炭灰ＨＡを用いた場合に比べて多くなっている。 When coal ash HS containing a large amount of SiO 2 component is used, the blending ratio of silica stone that is relatively difficult to melt compared to coal ash and iron raw materials can be reduced. Formulation ratio of coal ash Conversely, better if generally melts easily Al 2 O 3 / SiO 2 of (mass ratio) was used less coal ash HS, Al 2 O 3 / SiO 2 (weight ratio) Is larger than when using large coal ash HA.
各試料を１４５０℃で６０分間焼成し、セメントクリンカーを得た。得られたクリンカーの係数値、ボーグ式による鉱物組成、ｆ−ＣａＯ量およびクリンカーの空隙率を以下の表３に示す。 Each sample was fired at 1450 ° C. for 60 minutes to obtain a cement clinker. Table 3 below shows the coefficient values of the obtained clinker, the mineral composition according to the Borg formula, the amount of f-CaO, and the porosity of the clinker.
また各測定は以下の方法による。
（１）原料およびセメントクリンカーの化学組成の測定：ＪＩＳ Ｒ ５２０４に準拠する蛍光Ｘ線分析法により測定した。
（２）クリンカーの焼成性の指標としてクリンカーの空隙率を測定したが、その測定は、アルコール溶媒を用いた液中秤量法により求めた。
Moreover, each measurement is based on the following method.
(1) Measurement of chemical composition of raw material and cement clinker: Measured by a fluorescent X-ray analysis method according to JIS R 5204.
(2) The porosity of the clinker was measured as an index of the clinker firing property, and the measurement was obtained by a submerged weighing method using an alcohol solvent.
実施例は本発明に関わるものであり、１４５０℃焼成においてクリンカーのｆ−ＣａＯは比較例の値よりも小さな値を示すとともに、クリンカーの空隙率の値も小さな値を示していることから焼成性が良好な結果となっている。 The examples relate to the present invention, and in firing at 1450 ° C., the clinker f-CaO shows a smaller value than the value of the comparative example, and the porosity value of the clinker also shows a smaller value. Is a good result.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014201479A (en) * | 2013-04-04 | 2014-10-27 | 宇部興産株式会社 | Method for producing cement clinker to be fired at low temperature |
| CN104193204A (en) * | 2014-08-30 | 2014-12-10 | 周峰 | Process for producing high-strength cement by using industrial waste residues |
| JP2016172680A (en) * | 2015-03-18 | 2016-09-29 | 太平洋セメント株式会社 | Method of sorting coal ash |
| JP2017023895A (en) * | 2015-07-16 | 2017-02-02 | 株式会社トクヤマ | Management method of coal ash |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029679A (en) * | 2007-07-27 | 2009-02-12 | Taiheiyo Cement Corp | Cement clinker raw material, cement clinker, and cement |
| JP2010202463A (en) * | 2009-03-04 | 2010-09-16 | Ube Ind Ltd | Cement clinker, cement-based solidifying material, solidification treatment method for soil and method for producing cement clinker |
| JP2012224504A (en) * | 2011-04-19 | 2012-11-15 | Tokuyama Corp | Cement clinker |
-
2013
- 2013-03-27 JP JP2013066273A patent/JP2014189439A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029679A (en) * | 2007-07-27 | 2009-02-12 | Taiheiyo Cement Corp | Cement clinker raw material, cement clinker, and cement |
| JP2010202463A (en) * | 2009-03-04 | 2010-09-16 | Ube Ind Ltd | Cement clinker, cement-based solidifying material, solidification treatment method for soil and method for producing cement clinker |
| JP2012224504A (en) * | 2011-04-19 | 2012-11-15 | Tokuyama Corp | Cement clinker |
Non-Patent Citations (1)
| Title |
|---|
| 環境技術協会日本フライアッシュ協会, 石炭灰ハンドブック, vol. ４版, JPN7017000197, May 2005 (2005-05-01), pages 25, ISSN: 0003485499 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014201479A (en) * | 2013-04-04 | 2014-10-27 | 宇部興産株式会社 | Method for producing cement clinker to be fired at low temperature |
| CN104193204A (en) * | 2014-08-30 | 2014-12-10 | 周峰 | Process for producing high-strength cement by using industrial waste residues |
| CN104193204B (en) * | 2014-08-30 | 2016-08-31 | 周峰 | Utilize the technique that industrial residue produces high strength cement |
| JP2016172680A (en) * | 2015-03-18 | 2016-09-29 | 太平洋セメント株式会社 | Method of sorting coal ash |
| JP2017023895A (en) * | 2015-07-16 | 2017-02-02 | 株式会社トクヤマ | Management method of coal ash |
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