JPH0544435B2 - - Google Patents
Info
- Publication number
- JPH0544435B2 JPH0544435B2 JP19483085A JP19483085A JPH0544435B2 JP H0544435 B2 JPH0544435 B2 JP H0544435B2 JP 19483085 A JP19483085 A JP 19483085A JP 19483085 A JP19483085 A JP 19483085A JP H0544435 B2 JPH0544435 B2 JP H0544435B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- particle size
- fly ash
- vibrating
- mixed
- 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
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 29
- 239000002002 slurry Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 19
- 239000010881 fly ash Substances 0.000 claims description 16
- 239000008187 granular material Substances 0.000 claims description 14
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 14
- 239000000347 magnesium hydroxide Substances 0.000 claims description 14
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 239000003245 coal Substances 0.000 claims description 13
- 239000003337 fertilizer Substances 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 239000004111 Potassium silicate Substances 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 9
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 9
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 9
- 239000000460 chlorine Substances 0.000 claims description 8
- 229910052801 chlorine Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 description 9
- 229910000514 dolomite Inorganic materials 0.000 description 8
- 239000010459 dolomite Substances 0.000 description 8
- 229910052749 magnesium Inorganic materials 0.000 description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 7
- 238000005469 granulation Methods 0.000 description 7
- 230000003179 granulation Effects 0.000 description 7
- 238000010304 firing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002680 magnesium Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Landscapes
- Fertilizers (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、フライアツシユを原料とする珪酸カ
リ肥料を製造するな際して、焼成炉に供給する中
間体の造粒乾燥方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for granulating and drying an intermediate to be supplied to a kiln when producing potassium silicate fertilizer using fly ash as a raw material.
［従来技術］
周知の如く、フライアツシユは、火力発電所等
の微粉炭燃焼炉から発生する廃ガス中に浮遊して
廃ガスと共に、排出され、主として電気集塵器で
補集される微粉である。このフライアツシユは、
二酸化珪素を主成分のするものであつて、化学的
には比較的安定な物質であるが、前述の様に微粉
であることからこれにカリウム塩を加えて焼成炉
で600〜1100℃で焼成すると、カリウムとフライ
アツシユ中の珪素とが反応してクエン酸溶解性
（く溶性という）の珪酸カリウムとなつて、く溶
性珪酸カリ肥料として利用できることが知られて
いる。[Prior Art] As is well known, fly ash is fine powder that floats in waste gas generated from pulverized coal combustion furnaces in thermal power plants, etc., is discharged together with the waste gas, and is mainly collected by electrostatic precipitators. . This fly attachment is
The main component is silicon dioxide, and it is a relatively stable substance chemically, but as mentioned above, since it is a fine powder, potassium salt is added to it and fired in a kiln at 600-1100℃. It is known that the potassium reacts with the silicon in the fly ash to become citric acid-soluble potassium silicate, which can be used as a citric acid-soluble potassium silicate fertilizer.
フライアツシユとカリウム塩との混合物を焼成
する場合、混合物は、粉状体であるよりも適当な
粒度の粒状体である方が取り扱い易く、かつ焼成
効率が高いものであり、しかも混合物を粒状体に
すると製品である珪酸カリ肥料も肥料として扱い
易いものとなる。 When firing a mixture of fly ash and potassium salt, it is easier to handle the mixture in the form of granules with an appropriate particle size than in the form of powder, and the firing efficiency is higher. This makes the product, potassium silicate fertilizer, easier to handle as fertilizer.
カリウム塩としては、通常、水酸化カリウム
（KOH）が用いられ、原料として用いられるもの
は濃度48％程度の水溶液である。従つてこれをフ
ライアツシユと混合すると、混合物はスラリーと
なり、これを焼成炉に投入するには、それに先だ
つて乾燥させる必要があり、同時に前述の点から
乾燥物を粒状体にする必要がある。 Potassium hydroxide (KOH) is usually used as the potassium salt, and the raw material used is an aqueous solution with a concentration of about 48%. Therefore, when this is mixed with fly ash, the mixture becomes a slurry, which needs to be dried before it can be fed into a kiln, and at the same time, from the above point, it is necessary to turn the dried material into granules.
ところで、珪酸カリ肥料を製造するには、前述
のフライアツシユ及び水酸化カリウム水溶液に加
えるに、燃料としての微粉状石炭と肥料として要
求されるマグネシユウム源とを加えて混合してス
ラリーとなし、これを造粒し次いで乾燥して焼成
炉に供給し、焼成炉で焼成して製品を得ることが
できる。 By the way, in order to produce potassium silicate fertilizer, in addition to the above-mentioned fly ash and potassium hydroxide aqueous solution, pulverized coal as a fuel and a magnesium source required as a fertilizer are added and mixed to form a slurry. The product can be obtained by granulating, drying, supplying to a kiln, and firing in the kiln.
しかしながら、一般的に水酸化マグネシウムは
塩素を比較的多く（２％以上）含んでいるため
に、配管及び熱交換器等に詰りを生じ、そのため
に塩素を含んでいないドロマイト（主成分
CaCO3・MgCO3）を使用することにより配管及
び熱交換器等の詰りの問題を解消し得ることを見
出した。 However, since magnesium hydroxide generally contains a relatively large amount of chlorine (more than 2%), it can clog pipes and heat exchangers, etc.
We have discovered that the problem of clogging of pipes, heat exchangers, etc. can be solved by using CaCO 3 /MgCO 3 ).
しかしながら、ドロマイトでマグネシユウムの
必要量を配合すると、スラリー水分が17％程度と
高濃度となり、スラリー系配管弁の詰りの危険性
が高いという新たな問題が生じることが判明し
た。そこで、アルコール廃液を２〜３％添加する
とスラリー性状は良くなるが、アルコール廃液に
は約３％の塩素が混入さているため、ドロマイト
代替指向には逆向となることが判明した。 However, it was discovered that when the required amount of magnesium is mixed with dolomite, the slurry water content becomes as high as 17%, creating a new problem: the slurry system piping valves are at high risk of clogging. Therefore, it was found that adding 2 to 3% of alcohol waste liquid improves the properties of the slurry, but since the alcohol waste liquid contains about 3% chlorine, it was found to be against the trend of replacing dolomite.
本出願人は、種々研究の結果、ドロマイトを篩
分過程において生じる所定粒径以下のリサイクル
粒ないし粉の混入することにより、スラリー水分
を19％以上に確保できて、スラリー系配管弁の詰
りの危険を防止し得ることを見出した（特開昭59
−8683号公報参照）。 As a result of various studies, the present applicant has found that by mixing dolomite with recycled grains or powder of a predetermined particle size or less generated during the sieving process, it is possible to secure a slurry moisture content of 19% or more, thereby preventing clogging of slurry system piping valves. discovered that it is possible to prevent danger
-Refer to Publication No. 8683).
しかしながら、上記の公知技術によれば、ドロ
マイトは比較的に硬化して配管等に詰りを生じや
すいために振動篩で篩分けられた所定粒径以下の
ものにドロマイトをまぶし、これをドロマイドを
含まないものと混合して造粒していた。すなわち
ドロマイトはリサイクル系に投入されていた。そ
のために、造粒機で混合造粒作業を行つている間
に必ずしも均一なものが得られないという欠点が
あつた。 However, according to the above-mentioned known technology, dolomite is relatively hardened and tends to clog pipes, etc., so dolomite is sprinkled on particles with a predetermined particle size or less that have been sieved with a vibrating sieve, and the particles containing dolomite are sprinkled with dolomite. It was mixed with other materials and granulated. In other words, dolomite was put into the recycling system. Therefore, there was a drawback that uniform granulation was not necessarily obtained during mixing and granulation using a granulator.
［発明の目的］
したがつて、本発明の目的は、マグネシウムを
含有し、かつ配管等に詰りを生ぜず、しかも連続
的に均一な製品を得ることができるく溶性カリ肥
料の中間体の造粒乾燥方法を提供するにある。[Object of the invention] Therefore, the object of the present invention is to provide a granulated intermediate for a soluble potassium fertilizer that contains magnesium, does not cause clogging of pipes, etc., and can continuously obtain a uniform product. To provide a drying method.
［発明の構成］
本発明によるく溶性珪酸カリ肥料の中間体の造
粒乾燥方法によれば、フライアツシユと微粉炭及
び水酸化カリウム水溶液ならびに塩素含有量1.5
％以下の水酸化マグネシウムとを所定の割合に計
量して振動式混合機を連続的に供給し、振動式混
合機で混合したスラリー及び振動篩からの所定粒
径以下のリサイクル粒ないしリサイクル粉を所定
の割合で振動式造粒機に連続的に供給し、乾燥機
に供給する粒状物を造粒し乾燥機で乾燥した乾品
のうち所定粒径内のものを乾品原料とするように
なつている。[Structure of the Invention] According to the method for granulating and drying an intermediate for a soluble potassium silicate fertilizer according to the present invention, fly ash, pulverized coal, an aqueous potassium hydroxide solution, and a chlorine content of 1.5
% or less of magnesium hydroxide at a predetermined ratio and continuously feed it to a vibrating mixer, the slurry mixed with the vibrating mixer and recycled grains or recycled powder with a predetermined particle size or less from a vibrating sieve are Continuously feed the granules to a vibrating granulator at a predetermined ratio, granulate the granules fed to the dryer, and use the dried products within a predetermined particle size as dry product raw materials. It's summery.
［発明の作用効果］
近時の技術的発展に伴い、粉状水酸化マグネシ
ウムの塩素含有量が1.5％以下のものが市販され
るようになつた（例えば旭硝子株式会社製Mg
（OH）２：92％、水分：３％、Cl：1.3％その他
Al2O3、Fe2O3を僅かに含む）。このように塩素含
有量の少ない水酸化マグネシウムを用いれば、肥
料として必要なマグネシウムを得る量の水酸化マ
グネシウムを混入しても配管及び熱交換器等の詰
りが生じないことが実験上確かめられた。[Operation and Effect of the Invention] With recent technological developments, powdered magnesium hydroxide with a chlorine content of 1.5% or less has become commercially available (for example, Asahi Glass Co., Ltd.'s Mg
(OH)2: 92%, Moisture: 3%, Cl: 1.3% Others
(contains a small amount of Al 2 O 3 and Fe 2 O 3 ). It has been experimentally confirmed that if magnesium hydroxide with a low chlorine content is used, pipes and heat exchangers will not be clogged even if the amount of magnesium hydroxide is mixed in to obtain the magnesium required for fertilizer. .
したがつて、原料であるフライアツシユと微粉
炭と水酸化カリウム水溶液と水酸化マグネシウム
とは一度に混合できるので、均質な中間体を得る
ことができる。そして水酸化マグネシウム用いる
ことによつて配管及び熱交換器等の詰り生ずるこ
となく、造粒作業を好適に行うことができる。ま
た前記原料を一度に混合できるので、バツチ式で
なく連続的に混合および造粒作業が可能となり、
それ故に、マグネシウムを含有するく溶性珪酸カ
リ肥料の量産が達成できる。 Therefore, since the raw materials fly ash, pulverized coal, aqueous potassium hydroxide solution, and magnesium hydroxide can be mixed at the same time, a homogeneous intermediate can be obtained. By using magnesium hydroxide, the granulation work can be suitably performed without clogging pipes, heat exchangers, etc. In addition, since the raw materials can be mixed at once, it is possible to mix and granulate continuously instead of batchwise.
Therefore, mass production of soluble potassium silicate fertilizer containing magnesium can be achieved.
このマグネシウムを含有する肥料は通常Mgo3
％またそれ以上が好ましい。それ故に原料の割合
はフライアツシユ45〜55（重量％）、水酸化カリウ
ム（48％水溶液）35〜40（重量％）、石炭５〜10
（重量％）水酸化マグネシウム２〜10（重量％）で
ある。これらのうち、フライアツシユと水酸化カ
リウムと水酸化マグネシウムとはく溶性珪酸カリ
肥料の原料であるが、石炭（微粉炭）はそれ自体
珪酸を含んでいるが、その主目的は焼成炉で焼成
する場合の熱源である。 Fertilizers containing this magnesium are usually Mgo3
% or more is preferred. Therefore, the ratio of raw materials is fly ash 45-55 (wt%), potassium hydroxide (48% aqueous solution) 35-40 (wt%), coal 5-10.
(wt%) magnesium hydroxide 2 to 10 (wt%). Among these, fly ash, potassium hydroxide, magnesium hydroxide, and the raw materials for repellent potassium silicate fertilizers are used. Coal (pulverized coal) itself contains silicic acid, but its main purpose is when fired in a kiln. It is a heat source.
原料のうち水溶液は水酸化カリウムのみであ
り、上記の割合で混合する場合は混合および造粒
作業が好適に行われる。特に振動式の混合機およ
び造粒機はその作業を良好に行うことができる。 Among the raw materials, the aqueous solution is only potassium hydroxide, and when mixed in the above ratio, mixing and granulation operations are suitably performed. In particular, vibrating mixers and granulators can perform this work well.
［実施例］
以下図面を参照して本発明の実施例を説明す
る。図面は本発明を実施した装置を示し、図中、
１ないし４は貯槽であつて、それぞれフライアツ
シユ１、微粉状石炭２、水酸化カリウム水溶液
（48％水溶液）３、及び水酸化マグネシウム４が
貯溜されている。これらの原料は所定の割合に計
量され、混合機５に供給し、混合機５で混合され
てスラリーとなす。混合機５としては振動式混合
機を用いて均一なスラリーを効率よく得るように
する。スラリー成分の一例として、フライアツシ
ユ94ｇ、微粉状石炭16ｇ、水酸化カリウム水溶液
（48％水溶液）65.6ｇ水酸化マグネシウム14.4ｇ、
水21ｇの割合とすることによりスラリー水分は26
％となり、スラリー輸送の際のスラリー系配管弁
等の詰りの問題ほ生じない。[Examples] Examples of the present invention will be described below with reference to the drawings. The drawing shows an apparatus embodying the invention, in which:
1 to 4 are storage tanks in which fly ash 1, pulverized coal 2, potassium hydroxide aqueous solution (48% aqueous solution) 3, and magnesium hydroxide 4 are stored, respectively. These raw materials are measured at a predetermined ratio, supplied to the mixer 5, and mixed therein to form a slurry. A vibratory mixer is used as the mixer 5 to efficiently obtain a uniform slurry. As an example of slurry components, fly ash 94g, pulverized coal 16g, potassium hydroxide aqueous solution (48% aqueous solution) 65.6g magnesium hydroxide 14.4g,
By setting the ratio to 21g of water, the slurry moisture is 26g.
%, and there is no problem of clogging of slurry system piping valves, etc. when transporting slurry.
かかるスラリー原料をスラリータンク６に送
り、次いでスラリーポンプ７により振動式造粒機
８に供給し、ここでリサイクル粒ないし粉を混合
してこれを造粒乾燥機９に供給する。 The slurry raw material is sent to a slurry tank 6 and then supplied to a vibratory granulator 8 by a slurry pump 7, where recycled grains or powder are mixed and supplied to a granulator dryer 9.
造粒乾燥機９で造粒乾燥された粒状物は、例え
ばリフトコンベヤ１０により振動篩１１に供給さ
れる。この造粒乾燥機９の熱源としては後述の焼
成炉の廃熱を利用するのが好ましい。このため図
では省略されているが複数台の熱交換器が使用さ
れている。 The granulated material granulated and dried in the granulating dryer 9 is supplied to a vibrating sieve 11 by a lift conveyor 10, for example. As a heat source for this granulation dryer 9, it is preferable to use waste heat from a firing furnace, which will be described later. For this reason, although not shown in the figure, multiple heat exchangers are used.
振動篩１１で所定粒径以上のもの、所定粒径内
のもの、及び所定粒径以下のものとに篩分けし、
所定粒径内のものは適正乾品原料、すなわち焼成
炉への中間体として焼成炉１４に供給し、焼成炉
１４で例えば850〜900℃で約30分間焼成して製品
を得る。所定粒径以下のものと共にリサイクル粒
としてリサイクルタンク１３に送られる。 Sieve with a vibrating sieve 11 into those with a predetermined particle size or more, those with a predetermined particle size, and those with a predetermined particle size or less,
Those within a predetermined particle size are supplied to the kiln 14 as a suitable dry raw material, that is, an intermediate to the kiln, and fired in the kiln 14 at, for example, 850 to 900° C. for about 30 minutes to obtain a product. The particles are sent to the recycling tank 13 as recycled particles together with particles having a predetermined particle size or less.
［実施例］ 下記の態様により実験を行つた。[Example] Experiments were conducted in the following manner.
原料配合
フライアツシユ 800Kg
石 炭 125Kg
水酸化カリウム（48％水溶液） 540Kg
水酸化マグネシウム 55Kg
水 154Kg
これらの原料を振動式混合機５で約１分混合
し、さらに振動式造粒機８でリサイクル粉1040Kg
と混合した。これを毎分45Kgの割合で造粒乾燥機
９に送り、造粒乾燥し、粒径0.5〜４mm程度のも
のをふるいわけし、これを焼成炉１４で温度850
〜900℃で約30分間焼成した。その結果1000Kgの
製品を得た。 Raw material blend fly ash 800Kg Coal 125Kg Potassium hydroxide (48% aqueous solution) 540Kg Magnesium hydroxide 55Kg Water 154Kg These raw materials were mixed for about 1 minute in a vibrating mixer 5, and then recycled powder 1040Kg in a vibrating granulator 8.
mixed with. This is sent to the granulation dryer 9 at a rate of 45 kg per minute, granulated and dried, and particles with a particle size of about 0.5 to 4 mm are sieved, and then heated to a firing furnace 14 at a temperature of 850 kg.
Baked at ~900°C for about 30 minutes. As a result, we obtained 1000Kg of product.
［まとめ］
以上説明したように本発明によれば、ポンプ輸
送されるスラリーの水分は25％以上であつて、ス
ラリー系配管弁等の詰りの危険性はなく、又マグ
ネシウム源として塩素含有量の少ない水酸化マグ
ネシウムを使用しているので、塩化物による配管
及び熱交換器等の詰りの問題を生じない。更にフ
ライアツシユ、微粉状石炭、及び水酸化カリウム
水溶液の混合には振動式混合機を使用しているの
で、効率よく混合を行うこができ、また、スラリ
ーとリサイクル粒とによる粒状物の造粒には振動
式造粒機を使用しているので、効率よく粒状物に
造粒することができる。そして得られる製品は従
来方法による場合と全く遜色ないものである。[Summary] As explained above, according to the present invention, the water content of the pumped slurry is 25% or more, there is no risk of clogging of slurry system piping valves, etc., and the chlorine content is low as a magnesium source. Since less magnesium hydroxide is used, there is no problem of clogging of pipes, heat exchangers, etc. due to chloride. Furthermore, since a vibrating mixer is used to mix the fly ash, pulverized coal, and aqueous potassium hydroxide solution, it is possible to mix efficiently, and it is also possible to granulate granules using slurry and recycled granules. Since it uses a vibrating granulator, it can efficiently granulate into granules. The products obtained are completely comparable to those produced by conventional methods.
図面は本発明の方法を実施したフローシートで
ある。
１……フライアツシユの貯槽、２……微粉状石
炭の貯槽、３……水酸化カリウム水溶液の貯槽、
４……マグネシウムの貯槽、５……振動式混合
機、６…スラリータンク、７……スラリポンプ、
８……振動式造粒機、９……造粒乾燥機、１０…
…リフトコンベア、１１……振動篩、１２……粉
砕機、１３……リサイクルタンク、１４……焼成
炉。
The drawing is a flow sheet for implementing the method of the present invention. 1...Storage tank for fly ash, 2...Storage tank for pulverized coal, 3...Storage tank for aqueous potassium hydroxide solution,
4... Magnesium storage tank, 5... Vibratory mixer, 6... Slurry tank, 7... Slurry pump,
8... Vibrating granulator, 9... Granulation dryer, 10...
... Lift conveyor, 11 ... Vibrating sieve, 12 ... Pulverizer, 13 ... Recycling tank, 14 ... Calcining furnace.
Claims (1)
水溶液ならびに塩素含有量が1.5％以下の水酸化
マグネシウムとを所定の割合に計量して振動式混
合機に連続的に供給し、振動式混合機で混合した
スラリーおよび振動篩からの所定粒径以下のリサ
イクル粒ないしリサイクル粉を所定の割合で振動
式造粒機に連続的に供給し、乾燥機に供給する粒
状物を造粒し乾燥機で乾燥した乾品のうち所定粒
径内のものを乾品原料とすることを特徴とするく
溶性珪酸カリ肥料の中間体の造粒乾燥方法。1. Fly ash, pulverized coal, potassium hydroxide aqueous solution, and magnesium hydroxide with a chlorine content of 1.5% or less are weighed in a predetermined ratio and continuously supplied to a vibratory mixer, and the slurry is mixed with the vibratory mixer. The recycled granules or recycled powder from the vibrating sieve with a predetermined particle size or less are continuously supplied to a vibrating granulator at a predetermined ratio, and the granules supplied to the dryer are granulated and dried in the dryer. A method for granulating and drying an intermediate for a soluble potassium silicate fertilizer, the method comprising using those having a predetermined particle size as dry raw materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19483085A JPS6256390A (en) | 1985-09-05 | 1985-09-05 | Granule drying process for intermediate of citric acid soluble potassium silicate fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19483085A JPS6256390A (en) | 1985-09-05 | 1985-09-05 | Granule drying process for intermediate of citric acid soluble potassium silicate fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6256390A JPS6256390A (en) | 1987-03-12 |
| JPH0544435B2 true JPH0544435B2 (en) | 1993-07-06 |
Family
ID=16330966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19483085A Granted JPS6256390A (en) | 1985-09-05 | 1985-09-05 | Granule drying process for intermediate of citric acid soluble potassium silicate fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6256390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7337607B2 (en) | 2003-06-12 | 2008-03-04 | Donaldson Company, Inc. | Method of dispensing fuel into transient flow of an exhaust system |
-
1985
- 1985-09-05 JP JP19483085A patent/JPS6256390A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7337607B2 (en) | 2003-06-12 | 2008-03-04 | Donaldson Company, Inc. | Method of dispensing fuel into transient flow of an exhaust system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6256390A (en) | 1987-03-12 |
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