JP2001158685A - Collapsible granular fertilizer and method for producing the same - Google Patents
Collapsible granular fertilizer and method for producing the sameInfo
- Publication number
- JP2001158685A JP2001158685A JP34010099A JP34010099A JP2001158685A JP 2001158685 A JP2001158685 A JP 2001158685A JP 34010099 A JP34010099 A JP 34010099A JP 34010099 A JP34010099 A JP 34010099A JP 2001158685 A JP2001158685 A JP 2001158685A
- Authority
- JP
- Japan
- Prior art keywords
- granular fertilizer
- powder
- binder
- granular
- steel slag
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/04—Calcareous fertilisers from blast-furnace slag or other slags containing lime or calcium silicates
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水中及び土壌中の
崩壊性が良好な鉄鋼スラグ粒状肥料に関する。TECHNICAL FIELD The present invention relates to a granular fertilizer of steel slag having good disintegration properties in water and soil.
【０００２】[0002]
【従来の技術】製鐵所で発生する鉄鋼スラグは、主とし
て路盤材、コンクリート材等の土木材として利用されて
いるが、化学成分としてカルシウム分、鉄分、珪酸分等
を多く含有するため肥料として広く利用されている。2. Description of the Related Art Iron and steel slag generated in steel works is mainly used as soil material such as roadbed materials and concrete materials. However, since it contains a large amount of calcium, iron, silicate, etc. as chemical components, it is used as fertilizer. Widely used.
【０００３】肥料分野では近年の農業の機械化普及に伴
う機械散布方式の採用により肥料形態が旧来の砂状から
粒状化へ急速に移行しつつある。即ち、鉄鋼スラグから
作られる肥料には砂状品と粒状品があり、前者は２ｍｍ
以下の砂状のもので、後者は更に細かくしたものを造粒
機等により１〜４ｍｍ程度の粒状にしたものである。粒
状品は一般に散布時に風の影響を受けにくいため機械散
布に適しており、更に水中や水分の高い土壌中で崩壊粉
状化する特性を有しており、砂状品に比べ更に細かく粉
砕した原料を使用しているので肥料効果が大きくなる。[0003] In the field of fertilizers, the use of a mechanical spraying method accompanying the spread of mechanization in agriculture in recent years has led to a rapid shift in the form of fertilizer from conventional sandy to granular. That is, fertilizers made from steel slag include sandy and granular products, the former of which is 2 mm.
The following sandy materials are used, and the latter is obtained by further reducing the size to about 1 to 4 mm using a granulator or the like. Granular products are generally less susceptible to the effects of wind when sprayed, so they are suitable for mechanical spraying, and have the property of disintegrating into powder in water or high-moisture soil. The fertilizer effect increases because raw materials are used.
【０００４】従来、鉄鋼スラグ粒状肥料に用いる造粒バ
インダーとしては、リグニンスルホン酸等が用いられて
いる。そしてその造粒バインダーの添加率は、鉄鋼スラ
グ粉末に対し、造粒バインダーの固形物量として５〜１
０％程度になるように添加し、得られた造粒生ペレット
をロータリー乾燥法等で乾燥して製造している。Conventionally, lignin sulfonic acid or the like has been used as a granulating binder used for granular fertilizer of steel slag. And the addition rate of the granulated binder is 5 to 1 as a solid matter amount of the granulated binder with respect to the iron and steel slag powder.
It is added so as to be about 0%, and the obtained granulated raw pellets are dried by a rotary drying method or the like to produce.
【０００５】しかしながら、従来の鉄鋼スラグを原料と
した粒状肥料、ことに転炉から発生する転炉スラグのよ
うに遊離石灰及び水酸化カルシウムを含む結晶質系を原
料とした粒状肥料は水中及び土壌中での崩壊性が十分で
ないため植物栄養上とともに土壌改質面で必ずしも満足
するものでなかった。即ち、粒状肥料試験法における水
中崩壊性試験は、２ｍｍ以上の粒状肥料５０粒が水中に
おいて２４時間以内で８０％以上崩壊すること、また土
壌中崩壊性試験は、水中崩壊性試験に用いたものと同様
の粒状肥料を含水率６０％の土壌中に７日間埋め込み８
０％以上崩壊することを条件として試験を行うものであ
るが、従来の前記粒状肥料はこれを十分満足することが
できなかった。However, conventional granular fertilizers made of steel slag as raw materials, particularly granular fertilizers made of a crystalline material containing free lime and calcium hydroxide, such as converter slag generated from a converter, are used in water and soil. It was not always satisfactory in terms of plant nutrition and soil modification due to insufficient disintegration in the soil. In other words, the underwater disintegration test in the granular fertilizer test method shows that 50 particles of 2 mm or more granular fertilizer disintegrates in water within 80 hours or more within 24 hours, and the soil disintegration test used in the underwater disintegration test Embed the same granular fertilizer in soil with a water content of 60% for 7 days 8
The test is carried out under the condition that it disintegrates by 0% or more, but the conventional granular fertilizer could not sufficiently satisfy this.
【０００６】従来の粒状肥料が、この崩壊性試験を容易
に満足しえない理由は、粒状肥料原料となる鉄鋼スラグ
の組成と造粒時に添加する水分に関係することが大き
い。即ち、鉄鋼スラグの主体組成２ＣａＯ・ＳｉＯ
2（転炉スラグ）、ＣａＯ・Ａｌ2Ｏ 3・ＳｉＯ2（高炉ス
ラグ）、２ＣａＯ・ＭｇＯ・ＳｉＯ2（高炉スラグ）
等、またこれらに関連し含有する遊離石灰等が水和反応
を呈し固結化する性質を有しているところに原因があ
る。この性質はセメント材料として利用されているのは
周知のとおりである。[0006] Conventional granular fertilizers facilitate this disintegration test.
Steel slag used as a raw material for granular fertilizer
It is largely related to the composition of
No. That is, the main composition of steel slag 2CaO.SiO
Two(Converter slag), CaO / AlTwoO Three・ SiOTwo(Blast furnace
Lag), 2CaO ・ MgO ・ SiOTwo(Blast furnace slag)
Etc., and the free lime etc. related to these are hydrated
The cause is that it has the property of
You. This property is used as a cement material
It is well known.
【０００７】このように従来の粒状肥料は、水中及び土
壌中における崩壊性があまり良好ではない。崩壊性を改
善する方法としては、従来の粒状肥料に添加する前記バ
インダーの含有固形物量を１０〜１５％に増量すること
により崩壊性の向上を図っているが、いまだ満足する崩
壊性を得るまでに至っていない。また、前記バインダー
の添加率を増量することは、造粒コスト及び乾燥コスト
が大幅に増大するため、価格的に不利を招くのでこれら
の粒状肥料はいまだ充分な崩壊性を得ることができない
のが現状である。[0007] Thus, conventional granular fertilizers are not very good in disintegration in water and in soil. As a method of improving the disintegration, the disintegration is improved by increasing the solid content of the binder added to the conventional granular fertilizer to 10 to 15%, but until a satisfactory disintegration is obtained. Has not been reached. In addition, increasing the addition rate of the binder greatly increases the granulation cost and the drying cost, so that it is disadvantageous in terms of price, so that these granular fertilizers still cannot obtain sufficient disintegration. It is the current situation.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、従来のかか
る粒状肥料の欠点となっている崩壊性を長時間に亘り維
持せしめ、土壌及び植物根との接触面積を拡大し、また
土壌溶液に容易に肥料成分が溶解する条件を具備せし
め、かつ適正な硬度を有した崩壊性粒状肥料を提供する
ことを目的とする。DISCLOSURE OF THE INVENTION The present invention is intended to maintain the disintegration, which is a drawback of the conventional granular fertilizer, for a long period of time, to increase the contact area with soil and plant roots, and to improve the soil solution. An object of the present invention is to provide a disintegrable granular fertilizer which has conditions for easily dissolving a fertilizer component and has appropriate hardness.
【０００９】[0009]
【課題を解決するための手段】本発明は、以下の発明を
包含する。 （１）鉄鋼スラグ及び造粒バインダーを含有する粒状肥
料において、造粒バインダーが糖類及び澱粉質粉末を含
有することを特徴とする粒状肥料。 （２）糖類が単糖及び／又はオリゴ糖を含有する前記
（１）に記載の粒状肥料。 （３）澱粉質粉末が地下茎澱粉粉末である前記（１）に
記載の粒状肥料。 （４）鉄鋼スラグ粉末に造粒バインダーとして糖類及び
澱粉質粉末を混合し、造粒、乾燥することを特徴とする
粒状肥料の製造方法。The present invention includes the following inventions. (1) A granular fertilizer containing iron and steel slag and a granulated binder, wherein the granulated binder contains saccharides and starchy powder. (2) The granular fertilizer according to (1), wherein the saccharide contains a monosaccharide and / or an oligosaccharide. (3) The granular fertilizer according to (1), wherein the starchy powder is a rhizome starch powder. (4) A method for producing a granular fertilizer, which comprises mixing a saccharide and a starchy powder as a granulating binder with iron and steel slag powder, granulating and drying.
【００１０】[0010]
【発明の実施の形態】鉄鋼スラグには、高炉で鉄鉱石を
原料に銑鉄を製造する際に副生される高炉スラグ、銑鉄
やスクラップを原料に鋼を製造する際に副生される転炉
スラグ、電炉スラグがある。本発明に用いる鉄鋼スラグ
は、高炉スラグ、転炉スラグ、電炉スラグのいずれでも
よく、これらは単独でも混合して用いてもよい。BEST MODE FOR CARRYING OUT THE INVENTION Steel slag includes blast furnace slag by-produced when producing pig iron from iron ore in a blast furnace, and converter by-produced when producing steel from pig iron and scrap. There are slag and electric furnace slag. The steel slag used in the present invention may be any of blast furnace slag, converter slag, and electric furnace slag, and these may be used alone or in combination.
【００１１】本発明は、造粒バインダーとして糖類及び
澱粉質粉末を用いることを特徴とする。糖類及び澱粉質
粉末の両者を併用することにより、適正な硬度を有し、
かつ水中及び土壌中の崩壊性が良好な鉄鋼スラグ粒状肥
料を得ることができる。糖類の単独使用では、十分な崩
壊性が得られず、澱粉質粉末の単独使用では、適正な硬
度が得られない。The present invention is characterized in that saccharides and starchy powder are used as a granulating binder. By using both saccharides and starchy powder together, it has appropriate hardness,
In addition, it is possible to obtain a granular fertilizer of steel slag having good disintegration properties in water and soil. Sufficient disintegration cannot be obtained by using saccharides alone, and proper hardness cannot be obtained by using starch powder alone.
【００１２】糖類と澱粉質粉末との配合割合は、重量比
で、通常１０／９０〜９０／１０、好ましくは２０／８
０〜８０／２０である。糖類と澱粉質粉末の添加量は、
合計で、粒状肥料原料に対し固形物量として、通常０．
０５〜１０重量％、好ましくは０．１〜５．０重量％、
更に好ましくは０．３〜３重量％である。この範囲であ
れば、粒状肥料製造のコストが経済的に極めて有利とな
る。The mixing ratio of the saccharide to the starchy powder is usually 10/90 to 90/10, preferably 20/8, by weight.
0 to 80/20. The amount of saccharide and starchy powder added
In total, the solid fertilizer raw material usually has a solid content of 0.1%.
05 to 10% by weight, preferably 0.1 to 5.0% by weight,
More preferably, it is 0.3 to 3% by weight. Within this range, the cost of producing granular fertilizer is extremely economically advantageous.
【００１３】本発明に用いる糖類としては、好ましくは
単糖及び／又はオリゴ糖を含有する糖類、例えば砂糖、
異性化糖、水飴、廃糖蜜等が用いられるが、これらに限
定されるものではない。本発明に用いる澱粉質粉末とし
ては、馬鈴薯澱粉粉末、タピオカ澱粉粉末、甘藷澱粉粉
末等の地下茎澱粉粉末、又はこれらの地下茎澱粉を加工
した化工澱粉粉末のいずれかの澱粉質粉末を用いてもよ
いが、特に馬鈴薯澱粉粉末、タピオカ澱粉粉末が好まし
い。The saccharide used in the present invention is preferably a saccharide containing a monosaccharide and / or an oligosaccharide, for example, sugar,
Isomerized sugar, starch syrup, molasses, and the like are used, but are not limited thereto. The starchy powder used in the present invention may be any starchy powder such as potato starch powder, tapioca starch powder, rhizome starch powder such as sweet potato starch powder, or a modified starch powder obtained by processing these rhizome starches. However, potato starch powder and tapioca starch powder are particularly preferred.
【００１４】本発明の粒状肥料は、鉄鋼スラグ粉末に造
粒バインダーとして糖類及び澱粉質粉末を混合し、造
粒、乾燥することにより製造することができる。造粒
は、皿型又はドラム型の転動造粒あるいは押し出し造粒
でもよく、更には押し出し造粒した後に転動造粒を組み
合わせて行ってもよい。乾燥は、ロータリーキルン型あ
るいは流動層型等の通常の乾燥方法でよい。The granular fertilizer of the present invention can be produced by mixing saccharides and starchy powder as a granulating binder with iron and steel slag powder, granulating and drying. Granulation may be plate-type or drum-type rolling granulation or extrusion granulation, or may be performed by extruding granulation followed by rolling granulation. Drying may be performed by a conventional drying method such as a rotary kiln type or a fluidized bed type.
【００１５】本発明の粒状肥料は、適正な硬度を有し、
かつ安定的で良好な水中及び土壌中の崩壊性を有するた
め、土壌及び植物根との接触面積が拡大し、速効的な肥
料効果を促進し、接触面積が拡大することにより施肥量
の削減を図ることが可能である。The granular fertilizer of the present invention has an appropriate hardness,
It is stable and has good disintegration in water and soil, so the contact area with soil and plant roots is expanded, promoting a quick fertilizer effect, and reducing the amount of fertilizer by expanding the contact area. It is possible to plan.
【００１６】[0016]
【実施例】以下、実施例を挙げて本発明を具体的に説明
するが、本発明の範囲はこれらの実施例に限定されるも
のではない。 （実施例１〜５及び比較例１〜３）粉砕した鉄鋼スラグ
原料に造粒バインダーを所定量添加、混合した後、皿型
造粒機に入れ、水を噴霧して粒径が１〜４ｍｍになるま
で造粒した。これを１０５℃で乾燥し、水分含量を０．
１％以下として粒状肥料を得た。得られた粒状肥料のう
ち、粒径２ｍｍの粒状肥料各５０粒を試験用試料として
硬度及び水中崩壊性の比較を行った。硬度は木屋式硬度
計で測定した。EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples, but the scope of the present invention is not limited to these Examples. (Examples 1 to 5 and Comparative Examples 1 to 3) After adding and mixing a predetermined amount of a granulating binder to the pulverized steel slag raw material, the mixture was placed in a dish-type granulator, and water was sprayed to obtain a particle size of 1 to 4 mm. Until granulated. This was dried at 105 ° C. to reduce the water content to 0.
A granular fertilizer was obtained at 1% or less. Among the obtained granular fertilizers, hardness and disintegration in water were compared by using 50 granular fertilizers each having a particle diameter of 2 mm as test samples. The hardness was measured with a Kiya hardness meter.
【００１７】水中崩壊性の測定は、次のようにして行っ
た。試験用試料を２ｍｍの粒状の網篩で篩分け、篩上に
残ったものを試料とした。試料５０粒を篩上に並べて適
当な大きさの容器中に置き、試料が十分水に浸るまで静
かに水を注いだ。２４時間後、篩を静かに取り出して篩
上に残存する未崩壊粒を数え、その崩壊割合(百分率)を
求めた。結果を表１に示す。表１において、糖類として
は、砂糖を用い、澱粉質粉末としては、馬鈴薯澱粉を用
いた。The disintegration in water was measured as follows. The test sample was sieved with a 2 mm granular mesh sieve, and the sample remaining on the sieve was used as a sample. Fifty samples were placed on a sieve and placed in an appropriately sized container, and water was gently poured until the sample was sufficiently immersed in water. After 24 hours, the sieve was gently taken out, the undisintegrated particles remaining on the sieve were counted, and the disintegration ratio (percentage) was determined. Table 1 shows the results. In Table 1, sugar was used as the saccharide, and potato starch was used as the starchy powder.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【発明の効果】本発明の粒状肥料は、適正な硬度を有
し、かつ安定的で良好な水中及び土壌中の崩壊性を有す
る。また、本発明の粒状肥料は、崩壊性の向上が大なる
ため、土壌及び植物根との接触面積が拡大し、速効的な
肥料効果を促進し、接触面積が拡大することにより施肥
量の削減を図ることが可能である。Industrial Applicability The granular fertilizer of the present invention has appropriate hardness, and is stable and has good disintegration properties in water and soil. In addition, the granular fertilizer of the present invention increases the contact area with soil and plant roots because the disintegration is greatly improved, promotes a quick fertilizer effect, and reduces the amount of fertilization by increasing the contact area. It is possible to achieve.
【００２０】以上のように、本発明の粒状肥料は、適正
な硬度を有し、かつ安定的な水中及び土壌中の崩壊性を
有するので、水田のみならず、畑、果樹園、牧場、芝生
等においても全く同様にして使用することができ、実用
上、特に農業経済上極めて価値を有するものである。As described above, the granular fertilizer of the present invention has appropriate hardness and stable disintegration in water and soil, so that it can be used not only in paddy fields, but also in fields, orchards, ranches, and lawns. And the like can be used in exactly the same way, and are extremely valuable in practical use, particularly in agricultural economy.
Claims (4)
る粒状肥料において、造粒バインダーが糖類及び澱粉質
粉末を含有することを特徴とする粒状肥料。1. A granular fertilizer containing iron and steel slag and a granulated binder, wherein the granulated binder contains saccharides and starchy powder.
る請求項１記載の粒状肥料。2. The granular fertilizer according to claim 1, wherein the saccharide contains a monosaccharide and / or an oligosaccharide.
項１記載の粒状肥料。3. The granular fertilizer according to claim 1, wherein the starchy powder is a rhizome starch powder.
糖類及び澱粉質粉末を混合し、造粒、乾燥することを特
徴とする粒状肥料の製造方法。4. A method for producing a granular fertilizer, comprising mixing a saccharide and a starchy powder as a granulating binder with iron and steel slag powder, granulating and drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34010099A JP2001158685A (en) | 1999-11-30 | 1999-11-30 | Collapsible granular fertilizer and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34010099A JP2001158685A (en) | 1999-11-30 | 1999-11-30 | Collapsible granular fertilizer and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001158685A true JP2001158685A (en) | 2001-06-12 |
Family
ID=18333728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34010099A Pending JP2001158685A (en) | 1999-11-30 | 1999-11-30 | Collapsible granular fertilizer and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001158685A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2002066402A1 (en) * | 2001-02-21 | 2004-06-17 | Ｊｆｅスチール株式会社 | Method for producing slow-release potash fertilizer and slow-release potash fertilizer |
| FR2878173A1 (en) * | 2004-11-25 | 2006-05-26 | Valoragri Sa Sa | PROCESS FOR TREATING EXTINCTOR POWDER WASTE, AND FERTILIZER OBTAINED BY SUCH A METHOD |
| JP2007289803A (en) * | 2006-04-21 | 2007-11-08 | Denki Kagaku Kogyo Kk | Wet granulation method for inorganic powder containing quick lime |
| JP2008247665A (en) * | 2007-03-30 | 2008-10-16 | Iwate Industrial Research Center | Method of producing iron-and-steel slag fertilizer |
| JP2011083194A (en) * | 2009-10-13 | 2011-04-28 | Niigata Prefecture | Material for inhibiting rice from absorbing cadmium, and method for cultivating rice |
| WO2013029140A1 (en) | 2011-08-31 | 2013-03-07 | Cargill, Incorporated | Concentrated sugar additive as anti-dusting agent |
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| JP2011083194A (en) * | 2009-10-13 | 2011-04-28 | Niigata Prefecture | Material for inhibiting rice from absorbing cadmium, and method for cultivating rice |
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