JP2011136858A - Slaked lime granular material - Google Patents
Slaked lime granular material Download PDFInfo
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- JP2011136858A JP2011136858A JP2009297608A JP2009297608A JP2011136858A JP 2011136858 A JP2011136858 A JP 2011136858A JP 2009297608 A JP2009297608 A JP 2009297608A JP 2009297608 A JP2009297608 A JP 2009297608A JP 2011136858 A JP2011136858 A JP 2011136858A
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- calcium carbonate
- slaked lime
- acicular calcium
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 110
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 110
- 235000011116 calcium hydroxide Nutrition 0.000 title claims abstract description 110
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 110
- 239000008187 granular material Substances 0.000 title claims abstract description 41
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 220
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 19
- 239000000292 calcium oxide Substances 0.000 claims description 14
- 235000012255 calcium oxide Nutrition 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000013535 sea water Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 9
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000004571 lime Substances 0.000 claims description 7
- 239000008267 milk Substances 0.000 claims description 6
- 210000004080 milk Anatomy 0.000 claims description 6
- 235000013336 milk Nutrition 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 230000029087 digestion Effects 0.000 claims description 5
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 description 33
- 238000000034 method Methods 0.000 description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 8
- 229910052791 calcium Inorganic materials 0.000 description 8
- 239000011575 calcium Substances 0.000 description 8
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 8
- 239000000347 magnesium hydroxide Substances 0.000 description 8
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 8
- 239000003337 fertilizer Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009469 supplementation Effects 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 235000011437 Amygdalus communis Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229920000715 Mucilage Polymers 0.000 description 1
- 241000220304 Prunus dulcis Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000020224 almond Nutrition 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229940069978 calcium supplement Drugs 0.000 description 1
- 229930002875 chlorophyll Natural products 0.000 description 1
- 235000019804 chlorophyll Nutrition 0.000 description 1
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Fertilizers (AREA)
Abstract
【課題】乾燥状態では粒状の形態を安定に維持し、かつ水中においては容易に自己崩壊する消石灰粒状物を提供する。
【解決手段】針状炭酸カルシウムが消石灰１００質量部に対して７〜１００質量部の範囲にて含まれている針状炭酸カルシウム含有消石灰粒状物。
【選択図】なしDisclosed is a slaked lime granular material that stably maintains a granular form in a dry state and easily self-disintegrates in water.
An acicular calcium carbonate-containing slaked lime granular material containing acetic calcium carbonate in a range of 7 to 100 parts by mass with respect to 100 parts by mass of slaked lime.
[Selection figure] None
Description
本発明は、特に土壌へのカルシウム補給用の肥料として有用な消石灰粒状物、及びその製造方法に関するものである。 The present invention relates to a slaked lime granular material particularly useful as a fertilizer for calcium supplementation to soil, and a method for producing the same.
消石灰（水酸化カルシウム）の用途の一つとして、土壌へのカルシウム補給用の肥料がある。肥料として利用する消石灰は、散布時の飛散防止のために粒状物であることが好ましい。但し、散布後の消石灰粒状物は、土壌中に均一に分散するように、水との接触によって容易に自己崩壊して粉末状となることが好ましい。 One application of slaked lime (calcium hydroxide) is fertilizer for supplying calcium to the soil. It is preferable that the slaked lime used as a fertilizer is a granular material in order to prevent scattering at the time of spraying. However, it is preferable that the slaked lime particles after spraying are easily self-disintegrated into a powder form by contact with water so as to be uniformly dispersed in the soil.
特許文献１には、水中での崩壊性が高い消石灰粒状物として、消石灰と木粉や粘土とを含む消石灰粒状物が開示されている。 Patent Document 1 discloses a slaked lime granular material containing slaked lime, wood powder, and clay as a slaked lime granular material that is highly disintegratable in water.
特許文献２には、同じく水中崩壊性の高い消石灰粒状物として、消石灰と植物性粘質物及び／又は該化合物のエーテル化誘導体からなる粘結剤とベントナイトとを含む消石灰粒状物が開示されている。 Patent Document 2 discloses a slaked lime granule containing a caking agent and bentonite composed of slaked lime and a vegetable mucus and / or an etherified derivative of the compound as slaked lime granule having high water disintegration property. .
前記特許文献１に記載の消石灰粒状物では木粉や粘土、前記特許文献２に記載の消石灰粒状物では植物性粘質物やベントナイトがそれぞれバインダーとして用いられているが、これらはカルシウムを含まないため、カルシウム補給用の肥料としての効果を低減させる。
従って、本発明の目的は、カルシウム補給用の肥料としても有効な材料をバインダーとして用いて、乾燥状態では粒状の形態を安定に維持し、かつ水中においては容易に自己崩壊する消石灰粒状物を提供することにある。
In the slaked lime granular material described in Patent Document 1, wood powder and clay are used as binders, and in the slaked lime granular material described in Patent Document 2, vegetable mucilage and bentonite are used as binders, respectively, because they do not contain calcium. , Reduce the effect as a fertilizer for calcium supplementation.
Accordingly, an object of the present invention is to provide a slaked lime granule that stably maintains a granular form in a dry state and easily self-disintegrates in water by using a material effective as a fertilizer for calcium supplement as a binder. There is to do.
本発明者は、消石灰と針状炭酸カルシウム（アラゴナイト）とを所定の範囲で含む混合物を成形して得られた消石灰粒状物は、乾燥状態では粒状の形態を安定に維持し、かつ水中においては容易に自己崩壊することを見出して、本発明を完成した。 The present inventor, slaked lime granular material obtained by molding a mixture containing slaked lime and acicular calcium carbonate (aragonite) in a predetermined range, stably maintains a granular form in the dry state, and in water The present invention was completed by finding that it easily self-collapses.
従って、本発明は、針状炭酸カルシウムが消石灰１００質量部に対して７〜１００質量部の範囲にて含まれている針状炭酸カルシウム含有消石灰粒状物にある。 Therefore, this invention exists in the acicular calcium carbonate containing slaked lime granular material in which acicular calcium carbonate is contained in the range of 7-100 mass parts with respect to 100 mass parts of slaked lime.
本発明の針状炭酸カルシウム含有消石灰粒状物は、例えば、下記の方法により製造することができる。
（１）消石灰と針状炭酸カルシウムとを、消石灰１００質量部に対して、針状炭酸カルシウムの量が７〜１００質量部の範囲となる割合にて混合し、次いで得られた混合物を粒状に成形することからなる製造方法。
（２）生石灰と針状炭酸カルシウムとを、該生石灰の消化反応により生成する消石灰１００質量部に対して、針状炭酸カルシウムの量が７〜１００質量部の範囲となる割合にて、水の存在下で混合して生石灰を消化反応させて、消石灰と針状炭酸カルシウムとの混合物を得て、次いで得られた混合物を粒状に成形することからなる製造方法。
The acicular calcium carbonate containing slaked lime granular material of this invention can be manufactured by the following method, for example.
(1) Slaked lime and acicular calcium carbonate are mixed in a proportion such that the amount of acicular calcium carbonate is in the range of 7 to 100 parts by mass with respect to 100 parts by mass of slaked lime, and the resulting mixture is then granulated. A manufacturing method comprising molding.
(2) With respect to 100 parts by mass of slaked lime produced by digestion reaction of quick lime with quick lime and acicular calcium carbonate, water is used at a ratio such that the amount of acicular calcium carbonate is in the range of 7 to 100 parts by mass. A production method comprising mixing in the presence and digesting quick lime to obtain a mixture of slaked lime and acicular calcium carbonate, and then molding the resulting mixture into granules.
上記の製造方法において用いる針状炭酸カルシウムは、石灰乳と海水中の炭酸イオンもしくは炭酸水素イオンとの反応生成物であることが好ましい。 The acicular calcium carbonate used in the above production method is preferably a reaction product of lime milk and carbonate ions or bicarbonate ions in seawater.
本発明の針状炭酸カルシウム含有消石灰粒状物は、後述の実施例の結果から明らかなように、水中での崩壊性が高い。また、本発明の消石灰粒状物に含まれる針状炭酸カルシウムは、弱アルカリ性で、かつ土壌へのカルシウム供給剤としても作用する。従って、本発明の消石灰粒状物は、土壌へのカルシウム補給用の肥料として有用である。 The needle-like calcium carbonate-containing slaked lime granular material of the present invention is highly disintegratable in water, as is apparent from the results of Examples described later. Moreover, the acicular calcium carbonate contained in the slaked lime granular material of this invention is weakly alkaline, and acts also as a calcium supply agent to soil. Therefore, the slaked lime granular material of the present invention is useful as a fertilizer for supplying calcium to the soil.
本発明の針状炭酸カルシウム含有消石灰粒状物は、消石灰１００質量部に対して、針状炭酸カルシウムを７〜１００質量部の範囲、好ましくは１０〜８０質量部の範囲、特に好ましくは１０〜６０質量部の範囲にて含む。 The acicular calcium carbonate-containing slaked lime granular material of the present invention is a range of 7 to 100 parts by mass, preferably 10 to 80 parts by mass, particularly preferably 10 to 60 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime. Including in the range of parts by mass.
針状炭酸カルシウムは、平均長さが５〜１０μｍの範囲にあることが好ましい。また、平均直径は１〜３μｍの範囲にあることが好ましい。 The acicular calcium carbonate preferably has an average length in the range of 5 to 10 μm. Moreover, it is preferable that an average diameter exists in the range of 1-3 micrometers.
本発明の針状炭酸カルシウム含有消石灰粒状物は、密度が１．０〜１．９ｇ／ｃｍ3の範囲にあることが好ましく、１．３〜１．６ｇ／ｃｍ3の範囲にあることが特に好ましい。 Acicular calcium carbonate-containing slaked lime particulate material of the present invention is preferably a density in the range of 1.0~1.9g / cm 3, in the range of 1.3~1.6g / cm 3 particularly preferable.
本発明の針状炭酸カルシウム含有消石灰粒状物は、形状に特には制限はなく、球状、板状、角柱状、円柱状及びアーモンド状などの通常の肥料に用いられる種々の形状とすることができる。針状炭酸カルシウム含有消石灰粒状物のサイズは、一般に最長部の長さで１〜５０ｍｍの範囲である。 The acicular calcium carbonate-containing slaked lime granular material of the present invention is not particularly limited in shape, and can be various shapes used for ordinary fertilizers such as a spherical shape, a plate shape, a prismatic shape, a cylindrical shape, and an almond shape. . The size of the needle-like calcium carbonate-containing slaked lime particles is generally in the range of 1 to 50 mm with the length of the longest part.
本発明の針状炭酸カルシウム含有消石灰粒状物は、水酸化マグネシウムを針状炭酸カルシウム１００質量部に対し３〜４０質量部の範囲にて含んでいてもよい。水酸化マグネシウムは植物の葉緑素を構成するマグネシウムの補給効果がある。 The acicular calcium carbonate containing slaked lime granular material of this invention may contain magnesium hydroxide in the range of 3-40 mass parts with respect to 100 mass parts of acicular calcium carbonate. Magnesium hydroxide has an effect of supplementing magnesium constituting the chlorophyll of plants.
針状炭酸カルシウムは、石灰乳（水酸化カルシウム懸濁液）と海水とを混合して、石灰乳と海水中の炭酸イオンもしくは炭酸水素イオンとを反応させて、針状炭酸カルシウムを析出させ、次いで針状炭酸カルシウムを回収し、水で洗浄した後、乾燥することにより製造することができる。使用する石灰乳の量は、海水中の炭酸イオンと炭酸水素イオンの合計量１モルに対して水酸化カルシウムの量が１．０５〜１．３０モルの範囲となる量であることが好ましい。水酸化カルシウムを炭酸イオンと炭酸水素イオンの合計量よりも過剰に加えると、針状炭酸カルシウムと共に海水中のマグネシウムが水酸化マグネシムとして析出し、水酸化マグネシムを含む針状炭酸カルシウムを得ることができる。上記針状炭酸カルシウムとしては、海水中のマグネシウム塩とアルカリ源から水酸化マグネシウムを製造する方法（海水法）において、事前に少量の水酸化カルシウムを添加して海水中の炭酸イオンもしくは炭酸水素イオンと反応させることで炭酸イオンや炭酸水素イオンを炭酸カルシウムとして固定、分離除去する工程で副生する針状炭酸カルシウムを用いることができる。 Acicular calcium carbonate mixes lime milk (calcium hydroxide suspension) and seawater, and reacts lime milk with carbonate ion or hydrogen carbonate ion in seawater to precipitate acicular calcium carbonate. Subsequently, acicular calcium carbonate can be recovered, washed with water, and then dried. The amount of lime milk to be used is preferably an amount such that the amount of calcium hydroxide is in the range of 1.05-1.30 mol with respect to 1 mol of the total amount of carbonate ions and hydrogen carbonate ions in seawater. When calcium hydroxide is added in excess of the total amount of carbonate ions and bicarbonate ions, magnesium in seawater precipitates together with acicular calcium carbonate as magnesium hydroxide, and acicular calcium carbonate containing magnesium hydroxide can be obtained. it can. As the above-mentioned acicular calcium carbonate, in a method for producing magnesium hydroxide from magnesium salt in seawater and an alkali source (seawater method), a small amount of calcium hydroxide is added in advance to add carbonate ions or bicarbonate ions in seawater. It is possible to use acicular calcium carbonate produced as a by-product in the step of fixing, separating and removing carbonate ions or hydrogen carbonate ions as calcium carbonate.
本発明の針状炭酸カルシウム含有消石灰粒状物は、消石灰と針状炭酸カルシウムとを、消石灰１００質量部に対して、針状炭酸カルシウムの量が７〜１００質量部の範囲となる割合にて混合し、次いで得られた消石灰と針状炭酸カルシウムとの混合物を粒状に成形することからなる方法により製造することができる。 The acicular calcium carbonate containing slaked lime granular material of this invention mixes slaked lime and acicular calcium carbonate in the ratio from which the quantity of acicular calcium carbonate becomes the range of 7-100 mass parts with respect to 100 mass parts of slaked lime. Then, the resulting mixture of slaked lime and acicular calcium carbonate can be produced by a method comprising forming the mixture into granules.
消石灰と針状炭酸カルシウムとの混合物の成形方法には、圧縮形成法や押出成形法などの加圧成形法を用いることができる。 As a molding method of the mixture of slaked lime and acicular calcium carbonate, a pressure molding method such as a compression molding method or an extrusion molding method can be used.
消石灰と針状炭酸カルシウムとの混合物は、生石灰と針状炭酸カルシウムとを、生石灰の消化反応により生成する消石灰１００質量部に対して、針状炭酸カルシウムの量が７〜１００質量部の範囲となる割合にて、水の存在下で混合して生石灰を消化反応させることによって製造してもよい。生石灰を消化反応させるための水は、生石灰と針状炭酸カルシウムとを混合した後に加えてもよいし、針状炭酸カルシウムの含水固形物（針状炭酸カルシウムケーキ）として生石灰に加えてもよい。 The mixture of slaked lime and acicular calcium carbonate has a range of 7 to 100 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime that produces quick lime and acicular calcium carbonate by digestion reaction of quick lime. It may be produced by mixing the mixture in the presence of water and digesting the quicklime. Water for digesting quick lime may be added after mixing quick lime and acicular calcium carbonate, or may be added to quick lime as a water-containing solid substance of acicular calcium carbonate (acicular calcium carbonate cake).
［実施例１］
（１）針状炭酸カルシウムケーキの製造
容量１．５ｍ3の容器に海水１０００ｋｇ（炭酸イオン及び炭酸水素イオンをＣＯ2として８２質量ｐｐｍ含む）を投入し、次いで石灰乳（水酸化カルシウムを１３．２質量％含む）を１．３３ｋｇ（海水中の炭酸イオンと炭酸水素イオンの合計量１モルに対して水酸化カルシウムが１．２７モルとなる量）投入して撹拌した後、濾過により固液分離し、ケーキを製造した。
[Example 1]
(1) Production of acicular calcium carbonate cake 1000 kg of seawater (containing 82 mass ppm of carbonate ion and hydrogen carbonate ion as CO 2 ) is put into a 1.5 m 3 capacity container, and then lime milk (13. 2 mass%) is added to 1.33 kg (calcium hydroxide is 1.27 mol per mol of total amount of carbonate ion and hydrogen carbonate ion in seawater) and stirred, and then solid-liquid by filtration Separated to produce a cake.
得られたケーキを１０５℃の温度で１５時間乾燥して、その乾燥減量からケーキの含水率を求めたところ、含水率は３４質量％であった。 The obtained cake was dried at a temperature of 105 ° C. for 15 hours, and the moisture content of the cake was determined from the loss on drying. The moisture content was 34% by mass.
得られたケーキを１０５℃の温度で１５時間乾燥して得た乾燥物のＸ線回折パターンを測定したところ、アラゴナイト（針状炭酸カルシウム）と水酸化マグネシウムのＸ線回折パターンが確認された。乾燥物を走査型電子顕微鏡写真を用いて観察したところ、針状炭酸カルシウムの平均長さは７．５μｍ、平均直径は２．０μｍであった。また、乾燥物中のカルシウムとマグネシウムの含有量を、ＪＩＳ Ｒ ２２１６（耐火物製品の蛍光Ｘ線分析方法：２００５）に準拠した方法により測定し、炭酸カルシウム含有量と水酸化マグネシウム含有量に換算したところ、針状炭酸カルシウム含有量は６６．５質量％であり、水酸化マグネシウム含有量は２５．８質量％であった。以上のことから得られたケーキは、針状炭酸カルシウムケーキであることが確認された。 When the X-ray diffraction pattern of the dried product obtained by drying the obtained cake at a temperature of 105 ° C. for 15 hours was measured, the X-ray diffraction patterns of aragonite (acicular calcium carbonate) and magnesium hydroxide were confirmed. When the dried product was observed using a scanning electron micrograph, the average length of acicular calcium carbonate was 7.5 μm and the average diameter was 2.0 μm. In addition, the calcium and magnesium contents in the dried product are measured by a method based on JIS R 2216 (fluorescence X-ray analysis method for refractory products: 2005), and converted into calcium carbonate content and magnesium hydroxide content. As a result, the acicular calcium carbonate content was 66.5% by mass, and the magnesium hydroxide content was 25.8% by mass. From the above, it was confirmed that the cake obtained was a needle-like calcium carbonate cake.
（２）針状炭酸カルシウム含有粉末の製造
上記（１）で製造した針状炭酸カルシウムケーキを箱形乾燥機に入れて、１０５℃の温度で１５時間乾燥した。次いで、得られた乾燥物を解砕した後、目開き１ｍｍの篩で分級して、粒径１ｍｍ以下の針状炭酸カルシウム含有粉末（針状炭酸カルシウム含有量：６６．５質量％）を製造した。
(2) Production of acicular calcium carbonate-containing powder The acicular calcium carbonate cake produced in (1) above was placed in a box dryer and dried at a temperature of 105 ° C for 15 hours. Next, the obtained dried product is crushed and classified with a sieve having an opening of 1 mm to produce acicular calcium carbonate-containing powder having a particle size of 1 mm or less (acicular calcium carbonate content: 66.5% by mass). did.
（３）消石灰粒状物の製造
ＪＩＳ特号消石灰粉末５５．４ｇと、上記（２）で製造した針状炭酸カルシウム含有粉末（針状炭酸カルシウム含有量：６６．５質量％）４４．６ｇとを混合した。得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを５３．６質量部含む）２ｇを、一軸成形機を用いて１００ｋｇ／ｃｍ2の圧力で成形して、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造した。
(3) Manufacture of slaked lime granular material 55.4 g of JIS special name slaked lime powder, and 44.6 g of acicular calcium carbonate containing powder (acicular calcium carbonate content: 66.5 mass%) manufactured by said (2). Mixed. 2 g of the obtained powder mixture (containing 53.6 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime) was molded at a pressure of 100 kg / cm 2 using a uniaxial molding machine, and the diameter was 20 mm × height A cylindrical granular material of 5 mm acicular calcium carbonate-containing slaked lime was produced.
（４）水中崩壊性の評価
上記（３）で得られた針状炭酸カルシウム含有粒状物を水温２５℃の水中に投入し、水中投入後の粒状物の状態を目視で観察した。その結果を表１に示す。
(4) Evaluation of disintegration in water The acicular calcium carbonate-containing granular material obtained in (3) above was charged into water at a water temperature of 25 ° C., and the state of the granular material after being charged in water was visually observed. The results are shown in Table 1.
［実施例２］
ＪＩＳ特号消石灰粉末の量を７７．７ｇとし、針状炭酸カルシウム含有粉末（針状炭酸カルシウム含有量：６６．５質量％）の量を２２．３ｇとしたこと以外は、実施例１と同様にして得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを１９．１質量部含む）を用いて、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造し、得られた消石灰粒状物の水中崩壊性を評価した。その結果を表１に示す。
[Example 2]
The same as Example 1 except that the amount of JIS special slaked lime powder was 77.7 g and the amount of acicular calcium carbonate-containing powder (acicular calcium carbonate content: 66.5% by mass) was 22.3 g. Using the obtained powder mixture (19.1 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime), a cylindrical particle of acicular calcium carbonate-containing slaked lime having a diameter of 20 mm and a height of 5 mm is obtained. The underwater disintegration property of the manufactured and obtained slaked lime granular material was evaluated. The results are shown in Table 1.
［実施例３］
ＪＩＳ特号消石灰粉末の量を８５．１ｇとし、針状炭酸カルシウム含有粉末（針状炭酸カルシウム含有量：６６．５質量％）の量を１４．９ｇとしたこと以外は、実施例１と同様にして得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを１１．６質量部含む）を用いて、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造し、得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を評価した。その結果を表１に示す。
[Example 3]
The same as Example 1 except that the amount of JIS special slaked lime powder was 85.1 g and the amount of acicular calcium carbonate-containing powder (acicular calcium carbonate content: 66.5 mass%) was 14.9 g. Using the obtained powder mixture (including 11.6 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime), a cylindrical particle of slaked lime containing acicular calcium carbonate having a diameter of 20 mm and a height of 5 mm is obtained. The underwater disintegration property of the produced and obtained acicular calcium carbonate-containing slaked lime particles was evaluated. The results are shown in Table 1.
［実施例４］
ＪＩＳ特号消石灰粉末の量を８８．８ｇとし、針状炭酸カルシウム含有粉末の量を１１．２ｇとしたこと以外は、実施例１と同様にして得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを８．４質量部含む）を用いて、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造し、得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を評価した。その結果を表１に示す。
[Example 4]
A powder mixture obtained in the same manner as in Example 1 except that the amount of JIS special slaked lime powder was 88.8 g and the amount of acicular calcium carbonate-containing powder was 11.2 g (based on 100 parts by mass of slaked lime) Needle-shaped calcium carbonate-containing slaked lime particles having a diameter of 20 mm and a height of 5 mm are produced, and the obtained needle-like calcium carbonate-containing slaked lime particles are obtained. The underwater disintegration property was evaluated. The results are shown in Table 1.
［比較例１］
ＪＩＳ特号消石灰粉末の量を９１．１ｇとし、針状炭酸カルシウム含有粉末（針状炭酸カルシウム含有量：６６．５質量％）の量を８．９ｇとしたこと以外は、実施例１と同様にして得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを６．５質量部含む）を用いて、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造し、得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を評価した。その結果を表１に示す。
[Comparative Example 1]
Example 1 except that the amount of JIS special slaked lime powder was 91.1 g and the amount of acicular calcium carbonate-containing powder (acicular calcium carbonate content: 66.5 mass%) was 8.9 g. Using the obtained powder mixture (containing 6.5 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime), a cylindrical particle of slaked lime containing acicular calcium carbonate having a diameter of 20 mm and a height of 5 mm was obtained. The underwater disintegration property of the produced and obtained acicular calcium carbonate-containing slaked lime particles was evaluated. The results are shown in Table 1.
［比較例２］
ＪＩＳ特号消石灰粉末２ｇを一軸成形機を用いて３０ｋｇ／ｃｍ2の圧力で成形して、直径２０ｍｍ×高さ５ｍｍの消石灰の円柱状粒状物を製造し、得られた消石灰粒状物の水中崩壊性を実施例１と同様にして評価した。その結果を表１に示す。
[Comparative Example 2]
2 g of JIS special slaked lime powder is molded using a uniaxial molding machine at a pressure of 30 kg / cm 2 to produce cylindrical particles of slaked lime having a diameter of 20 mm and a height of 5 mm. The properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.
表１
────────────────────────────────────────
消石灰粒状物の組成比（質量部）
────────────────
消石灰：針状炭酸カルシウム 水中崩壊性の評価結果
────────────────────────────────────────
実施例１ １００：５３．６ 水中投入後、直ちに全量崩壊した。
実施例２ １００：１９．１ 水中投入後、直ちに全量崩壊した。
実施例３ １００：１１．６ 水中投入後、直ちに全量崩壊した。
実施例４ １００： ８．４ 水中投入後、直ちに部分的な崩壊が見られた。
────────────────────────────────────────
比較例１ １００： ６．５ 水中投入してから４時間経過後でも崩壊せず。
比較例２ １００： ０ 水中投入してから４時間経過後でも崩壊せず。
────────────────────────────────────────
注）消石灰粒状物の組成比は、原料の配合比から求めた計算値。
Table 1
────────────────────────────────────────
Composition ratio of slaked lime particles (parts by mass)
────────────────
Slaked lime: acicular calcium carbonate Evaluation results of water disintegration ────────────────────────────────────── ──
Example 1 100: 53.6 The whole amount disintegrated immediately after being poured into water.
Example 2 100: 19.1 The whole amount was immediately disintegrated after being put into water.
Example 3 100: 11.6 The whole amount disintegrated immediately after being put into water.
Example 4 100: 8.4 Partial disintegration was seen immediately after the addition of water.
────────────────────────────────────────
Comparative Example 1 100: 6.5 No collapse even after 4 hours have passed since it was put into water.
Comparative Example 2 100: 0 No disintegration even after 4 hours had passed since it was put into water.
────────────────────────────────────────
Note) The composition ratio of slaked lime particles is a calculated value obtained from the blending ratio of raw materials.
［実施例５］
生石灰６０ｇ（消化反応で生成する消石灰量：７９ｇ）と実施例１の（１）で製造した針状炭酸カルシウムケーキ（含水率：３４質量％、乾燥物中の針状炭酸カルシウム含有量：６６．５質量％）１００ｇとをミキサーで混合して、ケーキ中の水分により生石灰を消化反応させ、ケーキ中の残りの水を消化反応による発熱より蒸発させて、消石灰１００質量部に対して針状炭酸カルシウム５５．４質量部を含有する針状炭酸カルシウム含有消石灰粉末を得た。得られた針状炭酸カルシウム含有消石灰粉末（消石灰１００質量部に対して針状炭酸カルシウムを５５．４質量部含む）２ｇを、一軸成形機を用いて１００ｋｇ／ｃｍ2の圧力で成形して、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造し、得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を実施例１と同様にして評価した。その結果を表２に示す。
[Example 5]
60 g of quicklime (amount of slaked lime produced by digestion reaction: 79 g) and acicular calcium carbonate cake produced in (1) of Example 1 (water content: 34% by mass, acicular calcium carbonate content in the dried product: 66. 5 mass%) 100 g is mixed with a mixer, the quick lime is digested with moisture in the cake, and the remaining water in the cake is evaporated from the heat generated by the digestion reaction. Acicular calcium carbonate-containing slaked lime powder containing 55.4 parts by mass of calcium was obtained. 2 g of the obtained acicular calcium carbonate-containing slaked lime powder (containing 55.4 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime) was molded at a pressure of 100 kg / cm 2 using a uniaxial molding machine, A columnar granular material of acicular calcium carbonate-containing slaked lime having a diameter of 20 mm and a height of 5 mm was produced, and the disintegration property in water of the obtained acicular calcium carbonate-containing slaked lime granular material was evaluated in the same manner as in Example 1. The results are shown in Table 2.
［実施例６］
実施例５で得た針状炭酸カルシウム含有消石灰粉末（針状炭酸カルシウム含有消石灰粉末（消石灰１００質量部に対して針状炭酸カルシウムを５５．４質量部含む）１０ｇと、ＪＩＳ特号消石灰粉末１０ｇとを混合した。得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを１７．０質量部含む）２ｇを、一軸成形機を用いて１００ｋｇ／ｃｍ2の圧力で成形して、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造した。得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を実施例１と同様にして評価した。その結果を表２に示す。
[Example 6]
10 g of acicular calcium carbonate-containing slaked lime powder obtained in Example 5 (acicular calcium carbonate-containing slaked lime powder (including 55.4 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime) and 10 g of JIS special name slaked lime powder 2 g of the obtained powder mixture (including 17.0 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime) was molded at a pressure of 100 kg / cm 2 using a uniaxial molding machine, A cylindrical granule of needle-like calcium carbonate-containing slaked lime having a diameter of 20 mm and a height of 5 mm was produced, and the underwater disintegration property of the obtained needle-like calcium carbonate-containing slaked lime granule was evaluated in the same manner as in Example 1. As a result, Is shown in Table 2.
［実施例７］
ＪＩＳ特号消石灰粉末の量を２０ｇとしたこと以外は、実施例６と同様にして得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを１０．７質量部含む）を用いて、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造した。得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を実施例１と同様にして評価した。その結果を表２に示す。
[Example 7]
The powder mixture obtained in the same manner as in Example 6 except that the amount of JIS special slaked lime powder was 20 g (including 10.7 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime). A cylindrical granular material of needle-like calcium carbonate-containing slaked lime having a diameter of 20 mm and a height of 5 mm was produced. The underwater disintegration property of the obtained acicular calcium carbonate-containing slaked lime particles was evaluated in the same manner as in Example 1. The results are shown in Table 2.
［実施例８］
ＪＩＳ特号消石灰粉末の量を３０ｇとしたこと以外は、実施例６と同様にして得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを７．８質量部含む）を用いて、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造した。得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を実施例１と同様にして評価した。その結果を表２に示す。
[Example 8]
A powder mixture obtained in the same manner as in Example 6 except that the amount of JIS special slaked lime powder was 30 g (including 7.8 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime). A cylindrical granular material of needle-like calcium carbonate-containing slaked lime having a diameter of 20 mm and a height of 5 mm was produced. The underwater disintegration property of the obtained acicular calcium carbonate-containing slaked lime particles was evaluated in the same manner as in Example 1. The results are shown in Table 2.
［比較例３］
ＪＩＳ特号消石灰粉末の量を４０ｇとしたこと以外は、実施例６と同様にして得られた粉末混合物（消石灰１００質量部に対して針状炭酸カルシウムを６．１質量部含む）を用いて、直径２０ｍｍ×高さ５ｍｍの針状炭酸カルシウム含有消石灰の円柱状粒状物を製造した。得られた針状炭酸カルシウム含有消石灰粒状物の水中崩壊性を実施例１と同様にして評価した。その結果を表２に示す。
[Comparative Example 3]
A powder mixture obtained in the same manner as in Example 6 (including 6.1 parts by mass of acicular calcium carbonate with respect to 100 parts by mass of slaked lime) except that the amount of JIS special slaked lime powder was 40 g. A cylindrical granular material of needle-like calcium carbonate-containing slaked lime having a diameter of 20 mm and a height of 5 mm was produced. The underwater disintegration property of the obtained acicular calcium carbonate-containing slaked lime particles was evaluated in the same manner as in Example 1. The results are shown in Table 2.
表２
────────────────────────────────────────
消石灰粒状物の組成比（質量部）
────────────────
消石灰：針状炭酸カルシウム 水中崩壊性の評価結果
────────────────────────────────────────
実施例５ １００：５５．４ 水中投入後、直ちに全量崩壊した。
実施例６ １００：１７．０ 水中投入後、直ちに全量崩壊した。
実施例７ １００：１０．７ 水中投入後、直ちに全量崩壊した。
実施例８ １００： ７．８ 水中投入後、直ちに部分的な崩壊が見られた。
────────────────────────────────────────
比較例３ １００： ６．１ 水中投入してから４時間経過後でも崩壊せず。
────────────────────────────────────────
注）消石灰粒状物の組成比は、原料の配合比から求めた計算値。
Table 2
────────────────────────────────────────
Composition ratio of slaked lime particles (parts by mass)
────────────────
Slaked lime: acicular calcium carbonate Evaluation results of water disintegration ────────────────────────────────────── ──
Example 5 100: 55.4 The whole amount was immediately disintegrated after being poured into water.
Example 6 100: 17.0 After the addition of water, the entire amount immediately collapsed.
Example 7 100: 10.7 The whole amount disintegrated immediately after being put into water.
Example 8 100: 7.8 Partial disintegration was seen immediately after charging in water.
────────────────────────────────────────
Comparative Example 3 100: 6.1 No collapse even after 4 hours have passed since it was put into water.
────────────────────────────────────────
Note) The composition ratio of slaked lime particles is a calculated value obtained from the blending ratio of raw materials.
表１、２の結果から明らかなように、針状炭酸カルシウムを本発明の範囲で含む消石灰粒状物は、水中崩壊性に優れている。 As is clear from the results in Tables 1 and 2, slaked lime granular materials containing acicular calcium carbonate within the scope of the present invention are excellent in water disintegration.
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| JPS6136142A (en) * | 1984-07-27 | 1986-02-20 | 新東工業株式会社 | Dry granulation for slaked lime powder or slaked lime mixed powder |
| JPS62113718A (en) * | 1985-11-14 | 1987-05-25 | Okutama Kogyo Kk | Production of hexagonal complex of calcium carbonate |
| JPH01226784A (en) * | 1988-03-04 | 1989-09-11 | Sintokogio Ltd | Slaked lime grain as fertilizer and its production |
| JP2006028003A (en) * | 2004-06-14 | 2006-02-02 | Nippon Paper Industries Co Ltd | Method for producing whisker-like calcium carbonate |
-
2009
- 2009-12-28 JP JP2009297608A patent/JP5535613B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50105463A (en) * | 1974-02-04 | 1975-08-20 | ||
| JPS56105795A (en) * | 1980-01-28 | 1981-08-22 | Mitsubishi Rayon Co Ltd | Treatment method of waste water containing inorganic deleterious substance |
| JPS6136142A (en) * | 1984-07-27 | 1986-02-20 | 新東工業株式会社 | Dry granulation for slaked lime powder or slaked lime mixed powder |
| JPS62113718A (en) * | 1985-11-14 | 1987-05-25 | Okutama Kogyo Kk | Production of hexagonal complex of calcium carbonate |
| JPH01226784A (en) * | 1988-03-04 | 1989-09-11 | Sintokogio Ltd | Slaked lime grain as fertilizer and its production |
| JP2006028003A (en) * | 2004-06-14 | 2006-02-02 | Nippon Paper Industries Co Ltd | Method for producing whisker-like calcium carbonate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019162595A (en) * | 2018-03-20 | 2019-09-26 | 宇部興産株式会社 | Acidic water treatment condition design method and acidic water treatment method |
| JP7062222B2 (en) | 2018-03-20 | 2022-05-06 | Ｕｂｅ株式会社 | Acid water treatment condition design method and acid water treatment method |
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| JP5535613B2 (en) | 2014-07-02 |
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