JPH0239479B2 - - Google Patents
Info
- Publication number
- JPH0239479B2 JPH0239479B2 JP59028186A JP2818684A JPH0239479B2 JP H0239479 B2 JPH0239479 B2 JP H0239479B2 JP 59028186 A JP59028186 A JP 59028186A JP 2818684 A JP2818684 A JP 2818684A JP H0239479 B2 JPH0239479 B2 JP H0239479B2
- Authority
- JP
- Japan
- Prior art keywords
- coal ash
- weight
- fertilizer
- composition
- soluble
- 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 - Lifetime
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- 239000003337 fertilizer Substances 0.000 claims description 33
- 239000010883 coal ash Substances 0.000 claims description 29
- 239000004111 Potassium silicate Substances 0.000 claims description 20
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 20
- 235000019353 potassium silicate Nutrition 0.000 claims description 20
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 20
- 150000002506 iron compounds Chemical class 0.000 claims description 14
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 229940043430 calcium compound Drugs 0.000 claims description 7
- 150000001674 calcium compounds Chemical class 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 150000002681 magnesium compounds Chemical class 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 24
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 18
- 229910004298 SiO 2 Inorganic materials 0.000 description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 238000010304 firing Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- -1 aluminum compound Chemical class 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 235000011181 potassium carbonates Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- YPFNIPKMNMDDDB-UHFFFAOYSA-K 2-[2-[bis(carboxylatomethyl)amino]ethyl-(2-hydroxyethyl)amino]acetate;iron(3+) Chemical compound [Fe+3].OCCN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O YPFNIPKMNMDDDB-UHFFFAOYSA-K 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 235000019402 calcium peroxide Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Fertilizers (AREA)
Description
本発明は、石炭灰とカリウム塩を主原料として
用いるけい酸カリ肥料の製造方法に関するもので
ある。
従来から用いられるカリ肥料は水溶性であり、
肥料として植物に吸収される量は少量で大半は流
失するため、肥料としての効率が悪いばかりでな
く、河川水等を汚染するなど公害、省資源上好ま
しくなく。近年、この様な問題を解消する肥料と
して石炭灰とカリ塩を主原料とするけい酸カリ肥
料の製造方法が提案されている（例えば特開昭55
−51785号、特開昭55−20218号など）。
これらけい酸カリ肥料においては、肥料成分は
水に難溶であるが、植物の根が肥料成分を吸収す
る時に排泄するクエン酸により溶解されるため、
効率よくしかも長期にわたり肥効を保持する。し
かしながら、従来の方法の場合、けい酸カリ肥料
として要求される性能を満たす均一な製品を大量
廉価に生産することが困難であるため、未だ広く
実施されるまでには至つていない。例えば、石炭
灰とカリウム塩を焼成して得られるけい酸カリ肥
料においては、全シリカ含量は多いにもかかわら
ず、その塩酸溶解性SiO2成分量が著しく低いと
いう問題がある。けい酸カリ肥料（第１種）の規
格によると、塩酸溶解性SiO2成分量は25％以上
と定められているが、石炭灰とカリウム塩を焼成
して得られる塩酸溶解性SiO2成分量は、通常、
25％以下である。
本発明者らは、石炭灰とカリウム塩を主原料と
し、これを焼成してけい酸肥料を製造する方法に
おいて、けい酸溶解性SiO2成分量を増加させる
ことについて鋭意研究を重ねた結果、前記主原料
中に、補助成分として、鉄化合物を添加すること
によつてその目的を達成し得ることを見出した。
本発明においては、石炭灰とカリウム塩からな
る主原料に対し、補助成分として、鉄化合物を添
加することを特徴とし、この添加により、得られ
るけい酸カリ肥料中の塩酸溶解性SiO2成分量が
増加され、また同時にクエン酸溶解性K2O成分も
増大される。表−１に代表的な石炭灰Ａの組成を
示す。
The present invention relates to a method for producing potassium silicate fertilizer using coal ash and potassium salt as main raw materials. Traditionally used potash fertilizers are water-soluble;
Only a small amount is absorbed by plants as fertilizer, and most of it is washed away, so it is not only inefficient as a fertilizer, but also pollutes river water, causing pollution and being undesirable in terms of resource conservation. In recent years, a method for producing potassium silicate fertilizer using coal ash and potassium salt as the main raw materials has been proposed as a fertilizer to solve these problems (for example, Japanese Patent Application Laid-Open No. 1982
-51785, JP-A-55-20218, etc.). In these potassium silicate fertilizers, the fertilizer components are poorly soluble in water, but are dissolved by the citric acid excreted when plant roots absorb the fertilizer components.
Efficiently and retains fertilizer effect over a long period of time. However, in the case of the conventional method, it is difficult to produce a uniform product satisfying the performance required as a potassium silicate fertilizer in large quantities at a low cost, and thus it has not yet been widely implemented. For example, a potassium silicate fertilizer obtained by calcining coal ash and potassium salt has a problem in that, although the total silica content is high, the amount of hydrochloric acid-soluble SiO 2 component is extremely low. According to the standards for potassium silicate fertilizer (Type 1), the amount of hydrochloric acid-soluble SiO 2 component is set at 25% or more, but the amount of hydrochloric acid-soluble SiO 2 component obtained by burning coal ash and potassium salt is ,usually,
Less than 25%. The present inventors have conducted intensive research on increasing the amount of silicic acid-soluble SiO 2 component in a method of producing silicate fertilizer by burning coal ash and potassium salt as the main raw materials. It has been found that the purpose can be achieved by adding an iron compound as an auxiliary component to the main raw material. The present invention is characterized in that an iron compound is added as an auxiliary component to the main raw materials consisting of coal ash and potassium salt, and by this addition, the amount of hydrochloric acid-soluble SiO 2 component in the resulting potassium silicate fertilizer is reduced. and, at the same time, the citric acid-soluble K 2 O content is also increased. Table 1 shows the composition of typical coal ash A.
【表】
次に、前記組成の石炭灰A62.6重量部に対し、
Fe2O35.0重量部、K2CO332.4重量部を配合し、こ
の組成物を950℃で焼成して得られるけい酸カリ
肥料の組成を表−２に示す。また、この表−２に
は、比較のために、Fe2O3を加えずに、石炭灰
A67.6重量部にK2CO332.4重量部を配合し、この
組成物を950℃で焼成して得られるけい酸カリ肥
料の組成についても合せて示す。[Table] Next, for 62.6 parts by weight of coal ash A of the above composition,
Table 2 shows the composition of a potassium silicate fertilizer obtained by blending 5.0 parts by weight of Fe 2 O 3 and 32.4 parts by weight of K 2 CO 3 and firing this composition at 950°C. Table 2 also shows coal ash without adding Fe 2 O 3 for comparison.
The composition of a potassium silicate fertilizer obtained by blending 32.4 parts by weight of K 2 CO 3 with 67.6 parts by weight of A and firing this composition at 950°C is also shown.
【表】
なお、表−２において示した各符号は次のこと
を意味する。
Ｃ−K2O…２％クエン酸水溶液に溶解するK2Oの
重量％
ｗ−K2O…水溶性K2Oの重量％
ｕ−K2O…不溶性K2Oの重量％
Ｓ−SiO2…0.5N−HClに溶解するSiO2の重量％
表−２に示されたけい酸カリ肥料の組成から明
らかなように、比較例に比べ、本発明の場合、鉄
化合物の添加により、塩酸溶解性SiO2成分（Ｓ
−SiO2）量が著しく増大され、同時にクエン酸
溶解性K2O成分（Ｃ−K2O）量も増大されている
ことがわかる。
表−３に別の石炭灰Ｂの組成を示し、また表−
４にこの石炭灰B67.6重量部にK2CO332.4重量部、
Fe2O35.0重量部を配合し、この組成物を900℃で
焼成して得られたけい酸カリ肥料の組成、及び比
較のために、石炭灰B67.6重量部に、K2CO332.4
重量部を配合し、この組成物を900℃で焼成して
得られるけい酸肥料の組成を示す。[Table] Each symbol shown in Table 2 means the following. C- K2O ...Weight% of K2O dissolved in 2% citric acid aqueous solution w- K2O ...Weight% of water-soluble K2O u- K2O ...Weight% of insoluble K2O S-SiO 2 ...% by weight of SiO 2 dissolved in 0.5N-HCl As is clear from the composition of the potassium silicate fertilizer shown in Table 2, compared to the comparative example, in the case of the present invention, the addition of iron compounds makes it easier to dissolve in hydrochloric acid. SiO2 component (S
It can be seen that the amount of citric acid-soluble K 2 O component ( C -K 2 O) was significantly increased. Table 3 shows the composition of another coal ash B, and Table 3 shows the composition of another coal ash B.
4. 67.6 parts by weight of this coal ash B, 32.4 parts by weight of K 2 CO 3 ,
The composition of a potassium silicate fertilizer obtained by blending 5.0 parts by weight of Fe 2 O 3 and calcining this composition at 900°C, and for comparison, 67.6 parts by weight of coal ash B, 32.4 parts by weight of K 2 CO 3
The composition of a silicate fertilizer obtained by blending parts by weight and firing this composition at 900°C is shown below.
【表】【table】
【表】
表−４のけい酸カリ肥料の組成かりわかるよう
に、石炭灰Ｂの場合も、前記石炭灰Ａの場合と同
様に、Ｓ−SiO2成分は増加され、同時にＣ−
K2O成分も増加される。
前記から明らかなように、本発明の場合、石炭
灰とカリウム塩からなる主原料に対して補助成分
として鉄化合物を配合することにより、得られる
けい酸カリ肥料中のＳ−SiO2は増加されるが、
この場合、石炭灰の種類によつては、表−４に示
したように、Ｓ−SiO2成分が規格値の25％に未
だ達しない場合がある。このような場合、補助成
分として、鉄化合物をカルシウム化合物と組合せ
て加えることによつて、さらにＳ−SiO2成分量
を増加させることができる。この場合の例を表−
５に示す。なお、この場合の焼成温度は表−４の
場合と同様に900℃である。[Table] As can be seen from the composition of potassium silicate fertilizer in Table 4, in the case of coal ash B, as in the case of coal ash A, the S-SiO 2 component was increased, and at the same time, the C-
The K 2 O content is also increased. As is clear from the above, in the case of the present invention, S-SiO 2 in the obtained potassium silicate fertilizer is increased by adding an iron compound as an auxiliary component to the main raw material consisting of coal ash and potassium salt. but,
In this case, depending on the type of coal ash, as shown in Table 4, the S-SiO 2 component may still not reach the standard value of 25%. In such a case, the amount of S-SiO 2 component can be further increased by adding an iron compound in combination with a calcium compound as an auxiliary component. An example of this case is shown below.
5. Note that the firing temperature in this case is 900°C as in the case of Table 4.
【表】
本発明で用いる鉄化合物としては、Fe2O3等が
挙げられ、さらにこれらの鉄化合物主成分とする
鉱石やその他の組成物、例えば、赤泥等を用いる
ことができる。鉄化合物の添加量は、Fe2O3換算
で、原料組成物中、２〜10重量％、好ましくは４
〜８重量％になるような量である。また、カルシ
ウム化合物としては、CaO、Ca（OH）2、CaCO3
等のカルシウム化合物が挙げら、さらにこれらの
カルシウム化合物を主成分とする石灰石等の鉱石
やその他の組成物を用いることができる。カルシ
ウム化合物の添加量は、CaO換算で、原料組成物
中、２〜10重量％、好ましくは４〜８重量％にな
るような量である。カリウム塩としては、KOH、
K2CO3、KCl等が用いられ、その添加量は、K2O
換算で、石炭灰に対し、25〜40重量％、好ましく
は30〜35重量％である。さらに、本発明の場合、
鉄化合物に対して、アルミニウム化合物やマグネ
シウム化合物を組合せて添加することにより、製
品中のクエン酸溶解性K2O成分を高めることも可
能である。
石炭灰の組成は、原炭の種類や、それが排出さ
れる発電所等によつても変動するが、本発明の場
合、前記したように、石炭灰の組成が変動して
も、石炭灰に対し、カリウム塩と共に、鉄化合物
及び必要に応じアルミニウム化合物、カルシウム
化合物、マグネシウム化合物を添加することによ
り、第１種のけい酸カリ肥料の規格（クエン酸溶
解性K2O20％以上、塩酸溶解性SiO2成分25％以
上）に合致する良品質の製品を安定して得ること
ができる。本発明の場合、石炭灰としては、一般
的には、SiO250〜60重量％、Al2O320〜30重量
％、CaO2〜10重量％、MgO2〜10重量％、
Fe2O32〜10重量％を含有するものが使用される。
次に、本発明を図面により説明する。
図面において、１は石炭灰（フライアツシユ）
ホツパー、２はカリウム塩ホツパー、３は造粒用
バインダーホツパー、４は補助成分（鉄化合物、
又は鉄化合物とカルシウム化合物、必要に応じさ
らにアルミニウム化合物、マグネシウム化合物と
の混合物）ホツパーを示す。３又は４のホツパー
には、ホウ素等の微量肥料要素を添加することが
できる。
各ホツパー１〜４から、それぞれの原料成分を
適当な配合比で混合造粒機５に供給し、ここで各
成分を均一に混合すると共に、粒径１〜２mm程度
の寸法に造粒する。この造粒物は乾燥機６に送
り、300℃前後の温度で乾燥した後、焼成炉７に
送り、ここで700〜950℃で焼成し、焼成物は冷却
機８に送られ、製品とされる。９はブロワーであ
る。
次に本発明を実施例によりさらに詳細に説明す
る。
実施例 １
前記表−１に示した組成の石炭灰A1Kgに、炭
酸カリ0.52Kg、酸化鉄0.08Kgを混合造粒した後、
造粒物を300℃において20分間乾燥し、次いで焼
成炉において950℃で30分間焼成し、けい酸カリ
肥料1.4Kgを得た。この製品について、クエン酸
溶解性ならびに塩酸溶解性試験を行つたところ、
クエン酸溶解性カリはそれぞれ22.3％、塩酸溶解
性けい酸は25.9％の結果が得られた。
実施例 ２
前記表−３に示した組成の石炭灰B1Kgに炭酸
カリ0.56Kg、赤泥0.27Kg、マグネシアクリンカ0.1
Kg、石灰0.074Kgを混合造粒した。造粒物を300℃
において20分間乾燥した後、焼成炉に入れて900
℃30分間焼成し、けい酸カリ肥料1.7Kgを得た。
この製品についてクエン酸溶解性試験ならびに塩
酸溶解性試験を行なつたところ、クエン酸溶解性
カリについてはそれぞれ21.3％、塩酸溶解性けい
酸26.6％の結果を得た。
なお、石炭灰Ｂは従来の肥料化法ではクエン酸
溶解性カリ約17％、塩酸溶解性けい酸約18％の肥
料しか得られず肥料化が不可能とされて来た石炭
灰であるが、本発明による肥料製造法により赤
泥、マグネシアリンカ、石灰等の廉価な添加物を
用いて性能の良いけい酸カリ肥料とすることが出
来る。[Table] Examples of iron compounds used in the present invention include Fe 2 O 3 and the like, and ores and other compositions containing these iron compounds as main components, such as red mud, can also be used. The amount of the iron compound added is 2 to 10% by weight, preferably 4% by weight in the raw material composition in terms of Fe 2 O 3
The amount is such that it becomes ~8% by weight. In addition, calcium compounds include CaO, Ca(OH) 2 , CaCO 3
In addition, ores such as limestone and other compositions containing these calcium compounds as main components can be used. The amount of the calcium compound added is such that it accounts for 2 to 10% by weight, preferably 4 to 8% by weight, of the raw material composition in terms of CaO. Potassium salts include KOH,
K 2 CO 3 , KCl, etc. are used, and the amount added is K 2 O
In terms of conversion, it is 25 to 40% by weight, preferably 30 to 35% by weight, based on coal ash. Furthermore, in the case of the present invention,
It is also possible to increase the citric acid-soluble K 2 O component in the product by adding an aluminum compound or a magnesium compound to the iron compound in combination. The composition of coal ash varies depending on the type of raw coal and the power plant where it is discharged, but in the case of the present invention, as described above, even if the composition of coal ash varies, the composition of coal ash However, by adding an iron compound and, if necessary, an aluminum compound, a calcium compound, and a magnesium compound together with a potassium salt, the standards for the first type potassium silicate fertilizer (citric acid soluble K 2 O 20% or more, hydrochloric acid soluble It is possible to stably obtain high-quality products that meet the SiO2 content (25% or more). In the case of the present invention, coal ash generally includes 50 to 60% by weight of SiO2 , 20 to 30% by weight of Al2O3 , 10 to 10% by weight of CaO2, 10 to 10% by weight of MgO2,
Those containing 2 to 10% by weight of Fe 2 O 3 are used. Next, the present invention will be explained with reference to the drawings. In the drawing, 1 is coal ash (fly ash)
Hopper, 2 is a potassium salt hopper, 3 is a binder hopper for granulation, 4 is an auxiliary component (iron compound,
Or a mixture of an iron compound, a calcium compound, and optionally an aluminum compound or a magnesium compound) hopper. To hopper 3 or 4, trace fertilizer elements such as boron can be added. Each raw material component is supplied from each hopper 1 to 4 at an appropriate mixing ratio to a mixing granulator 5, where each component is uniformly mixed and granulated to a size of about 1 to 2 mm in particle size. This granulated material is sent to a dryer 6, where it is dried at a temperature of around 300°C, and then sent to a firing furnace 7, where it is fired at a temperature of 700 to 950°C, and the fired product is sent to a cooler 8, where it is made into a product. Ru. 9 is a blower. Next, the present invention will be explained in more detail with reference to Examples. Example 1 After mixing and granulating 1 kg of coal ash A having the composition shown in Table 1 above, 0.52 kg of potassium carbonate and 0.08 kg of iron oxide,
The granules were dried at 300°C for 20 minutes, and then fired in a firing furnace at 950°C for 30 minutes to obtain 1.4 kg of potassium silicate fertilizer. When we conducted citric acid solubility and hydrochloric acid solubility tests on this product, we found that
Results were obtained for citric acid-soluble potash and hydrochloric acid-soluble silicic acid of 22.3% and 25.9%, respectively. Example 2 1 kg of coal ash B having the composition shown in Table 3 above, 0.56 kg of potassium carbonate, 0.27 kg of red mud, and 0.1 kg of magnesia clinker.
kg and 0.074 kg of lime were mixed and granulated. Granules at 300℃
After drying for 20 minutes, put it in a kiln and heat it for 900℃.
℃ for 30 minutes to obtain 1.7 kg of potassium silicate fertilizer.
When this product was subjected to a citric acid solubility test and a hydrochloric acid solubility test, the citric acid soluble potassium was 21.3%, and the hydrochloric acid soluble silicic acid was 26.6%. Coal ash B is a type of coal ash that has been thought to be impossible to convert into fertilizer, as conventional fertilizer conversion methods yield only about 17% citric acid-soluble potassium and about 18% hydrochloric acid-soluble silicic acid. According to the fertilizer manufacturing method of the present invention, a high-performance potassium silicate fertilizer can be produced using inexpensive additives such as red mud, magnesia linker, and lime.
図面は本発明によるけい酸カリ肥料の製造工程
の１例を示すブロツク系統図である。
１……石炭灰ホツパー、２……カリウム塩ホツ
パー、３……造粒用バインダーホツパー、４……
補助成分ホツパー、５……混合造粒機、７……焼
成炉、８……冷却機、９……ブロワー。
The drawing is a block system diagram showing one example of the process for producing potassium silicate fertilizer according to the present invention. 1... Coal ash hopper, 2... Potassium salt hopper, 3... Binder hopper for granulation, 4...
Auxiliary component hopper, 5... Mixing granulator, 7... Calcining furnace, 8... Cooler, 9... Blower.
Claims (1)
成してけい酸カリ肥料を製造する方法において、
該主原料に対し、補助成分として、鉄化合物を添
加することを特徴とするけい酸カリ肥料の製造方
法。 ２ 該鉄化合物を、カルシウム化合物、アルミニ
ウム化合物及びマグネシウム化合物の中から選ば
れる少なくとも１種と組合せて添加する特許請求
の範囲第１項の方法。[Claims] 1. A method for producing potassium silicate fertilizer by burning coal ash and potassium salt as main raw materials,
A method for producing a potassium silicate fertilizer, which comprises adding an iron compound as an auxiliary component to the main raw material. 2. The method according to claim 1, wherein the iron compound is added in combination with at least one selected from calcium compounds, aluminum compounds, and magnesium compounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2818684A JPS60171286A (en) | 1984-02-16 | 1984-02-16 | Manufacture of potassium silicate fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2818684A JPS60171286A (en) | 1984-02-16 | 1984-02-16 | Manufacture of potassium silicate fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60171286A JPS60171286A (en) | 1985-09-04 |
| JPH0239479B2 true JPH0239479B2 (en) | 1990-09-05 |
Family
ID=12241664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2818684A Granted JPS60171286A (en) | 1984-02-16 | 1984-02-16 | Manufacture of potassium silicate fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60171286A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100278153B1 (en) * | 1997-12-29 | 2001-01-15 | 김태한 | Alkaline growth promoting and fermentation agent aqueous composition based on potassium and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58167487A (en) * | 1982-03-25 | 1983-10-03 | 電発フライアツシユ株式会社 | Method of reducing generation of nitrogen oxide in kiln during manufacture of potassium silicate fertilizer from fly ash |
-
1984
- 1984-02-16 JP JP2818684A patent/JPS60171286A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58167487A (en) * | 1982-03-25 | 1983-10-03 | 電発フライアツシユ株式会社 | Method of reducing generation of nitrogen oxide in kiln during manufacture of potassium silicate fertilizer from fly ash |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60171286A (en) | 1985-09-04 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |