JP2003048793A - Method of manufacturing slow-acting potash fertilizer - Google Patents
Method of manufacturing slow-acting potash fertilizerInfo
- Publication number
- JP2003048793A JP2003048793A JP2001234801A JP2001234801A JP2003048793A JP 2003048793 A JP2003048793 A JP 2003048793A JP 2001234801 A JP2001234801 A JP 2001234801A JP 2001234801 A JP2001234801 A JP 2001234801A JP 2003048793 A JP2003048793 A JP 2003048793A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- dephosphorization
- hot metal
- raw material
- potassium
- 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
Landscapes
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
- Fertilizers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水には溶解しない
がクエン酸には溶解するカリ分（以下、このカリ分を
「ク溶性カリ」と記す）を含み、緩効性を有するカリ肥
料の製造方法に関するものである。TECHNICAL FIELD The present invention relates to a potassium fertilizer having a slow release effect, which contains a potash component that is insoluble in water but is soluble in citric acid (hereinafter, this potash component is referred to as “ku-soluble potash”). The present invention relates to a manufacturing method.
【０００２】[0002]
【従来の技術】ク溶性のカリ化合物としては、〔Ｋ2 Ｏ
・（Ａｌ，Ｆｅ）2 Ｏ3 ・２ＳｉＯ2〕、〔Ｋ2 Ｏ・Ｍ
ｇＯ・ＳｉＯ2 〕、〔Ｋ2 Ｏ・ＣａＯ・ＳｉＯ2 〕等の
組成を有するものが知られており、そして、これらのカ
リ化合物を生成させて緩効性カリ肥料を製造する方法が
多数提案されている。2. Description of the Related Art As a soluble potassium compound, [K 2 O
・ (Al, Fe) 2 O 3・ 2SiO 2 ], [K 2 O ・ M
gO.SiO 2 ], [K 2 O.CaO.SiO 2 ] and the like are known, and many methods for producing slow-acting potassium fertilizers by producing these potassium compounds have been proposed. ing.
【０００３】例えば、特開昭６０−１２７２８６号公報
には、珪石、高炉スラグ、転炉スラグ、ニッケル製錬ス
ラグ、燐製錬スラグ、及び安山岩等の粉末と、炭酸カ
リ、苛性カリ等のカリ原料とを混合した後、この混合物
を加熱して溶融し、次いで冷却、粉砕して緩効性カリ肥
料を製造する方法が開示されている。しかし、同号公報
に開示された技術では、調合した原料を反応させる際
に、加熱源を用いた溶融工程又は焼成工程が必要であ
り、そのため、極めて多量の熱量を必要とすると云う問
題がある。For example, JP-A-60-127286 discloses powders of silica stone, blast furnace slag, converter slag, nickel smelting slag, phosphorus smelting slag, andesite and potassium raw materials such as potassium carbonate and caustic potassium. After mixing and, the mixture is heated and melted, and then cooled and ground to produce a slow-release potash fertilizer. However, in the technique disclosed in the same publication, when reacting the prepared raw material, a melting step or a firing step using a heating source is required, and therefore, there is a problem that an extremely large amount of heat is required. .
【０００４】この問題を解決するために、特開平１１−
１０６２７４号公報が提案されている。同号公報では、
溶銑の脱珪処理により生成する、ＳｉＯ2 を主成分とす
る脱珪スラグにカリ原料を添加し、溶銑中に吹き込む撹
拌用ガスにより脱珪スラグとカリ原料とを融合させ、次
いで、融合処理したスラグを冷却、固化して緩効性カリ
肥料を製造するので、原料の加熱に要する熱量が大幅に
節約できると共に極めて簡素な工程で製造でき、製造コ
ストの低減化が達成される。In order to solve this problem, Japanese Patent Laid-Open No. 11-
No. 106274 has been proposed. In the same publication,
A potash raw material was added to a silicidation slag containing SiO 2 as a main component, which was produced by the desiliconization treatment of hot metal, and the silicidation slag and the potash raw material were fused by a stirring gas blown into the hot metal, and then a fusion treatment was performed. Since the slag is cooled and solidified to produce the slow-release potash fertilizer, the amount of heat required to heat the raw material can be greatly saved and the raw material can be produced by an extremely simple process, and the production cost can be reduced.
【０００５】[0005]
【発明が解決しようとする課題】この緩効性カリ肥料
は、植物が生産する根酸（クエン酸等）によって吸収さ
れるため、必要量が利用され、雨や灌水に溶けにくく、
効果が長持ちすると云う特徴を有する。このため、農業
の省力化に大きく寄与してきた。Since this slow-release potash fertilizer is absorbed by root acid (citric acid etc.) produced by plants, a necessary amount is utilized and it is difficult to dissolve in rain or irrigation.
It has the characteristic that the effect lasts a long time. Therefore, it has greatly contributed to labor saving in agriculture.
【０００６】しかしながら、農業の省力化には、植物に
必要な三要素である窒素、燐酸、カリをいかに効率良く
投入するかが課題として残っている。三要素の中でも窒
素は収穫前に追肥が必要であるが、燐酸とカリとを同時
に緩効性肥料として投入できれば、長期間その効果が維
持できるため、追肥の必要がなくなり省力化が達成され
る。[0006] However, how to efficiently input nitrogen, phosphoric acid and potassium, which are the three necessary elements for plants, remains a challenge for labor saving in agriculture. Among the three elements, nitrogen requires supplemental fertilization before harvesting, but if phosphoric acid and potassium can be added simultaneously as slow-release fertilizers, the effect can be maintained for a long time, so there is no need for additional fertilization and labor saving is achieved. .
【０００７】本発明はこのような状況下でなされたもの
であって、その目的とするところは、緩効性カリ肥料で
ありながらその他の成分としてク溶性の燐酸を含有する
肥料を、原料の加熱に要する熱の消費量が少なく且つ工
程が簡素化された製造工程により製造する方法を提供す
ることである。The present invention has been made under such circumstances, and an object thereof is to heat a raw material of a fertilizer which is a slow-release potash fertilizer and which contains phosphoric acid which is soluble in other components. It is to provide a method for manufacturing by a manufacturing process in which the amount of heat required for the process is small and the process is simplified.
【０００８】[0008]
【課題を解決するための手段】第１の発明による緩効性
カリ肥料の製造方法は、脱燐処理された溶銑とこの溶銑
の脱燐処理の際に生成した脱燐スラグとを収納した溶銑
保持容器内にカリ原料を添加する工程と、溶銑中に攪拌
用ガスを吹き込んで攪拌し、脱燐スラグとカリ原料とを
融合させる工程と、融合して生成したスラグを冷却して
固化させる工程と、からなることを特徴とするものであ
る。The method for producing a slow-release potash fertilizer according to the first aspect of the present invention is to maintain hot metal containing dephosphorized hot metal and dephosphorized slag produced during the dephosphorizing process of the hot metal. A step of adding a potassium raw material into the container, a step of blowing a stirring gas into the hot metal to stir and fuse the dephosphorization slag and the potassium raw material, and a step of cooling and solidifying the slag produced by the fusion. It is characterized by consisting of.
【０００９】第２の発明による緩効性カリ肥料の製造方
法は、脱燐処理された溶銑とこの溶銑の脱燐処理の際に
生成した脱燐スラグとを収納した溶銑保持容器内にカリ
原料と成分調整剤とを添加する工程と、溶銑中に攪拌用
ガスを吹き込んで攪拌し、脱燐スラグとカリ原料と成分
調整剤とを融合させる工程と、融合して生成したスラグ
を冷却して固化させる工程と、からなることを特徴とす
るものである。In the method for producing a slow-release potash fertilizer according to the second aspect of the present invention, the potassium-containing raw material is placed in a hot metal holding container containing dephosphorized hot metal and dephosphorized slag produced during the dephosphorizing process of the hot metal. A step of adding a component adjusting agent, a step of blowing a stirring gas into the hot metal and stirring the mixture to fuse the dephosphorized slag, the potassium raw material and the component adjusting agent, and cooling and solidifying the slag produced by the fusion. It is characterized by comprising the step of:
【００１０】第３の発明による緩効性カリ肥料の製造方
法は、溶銑保持容器内での攪拌用ガスを用いた溶銑の脱
燐処理中にカリ原料を添加し、脱燐処理により生成する
脱燐スラグとカリ原料とを前記攪拌用ガスにて攪拌して
融合させる工程と、融合して生成したスラグを冷却して
固化させる工程と、からなることを特徴とするものであ
る。The method for producing a slow-release potash fertilizer according to the third aspect of the present invention is a dephosphorization process in which a potassium raw material is added during the dephosphorization process of hot metal using a stirring gas in a hot metal holding container and the dephosphorization process produces the dephosphorization process. The method is characterized by comprising a step of stirring and fusing the slag and the potassium raw material with the stirring gas, and a step of cooling and solidifying the slag produced by the fusion.
【００１１】第４の発明による緩効性カリ肥料の製造方
法は、溶銑保持容器内での攪拌用ガスを用いた溶銑の脱
燐処理中にカリ原料と成分調整剤とを添加し、脱燐処理
により生成する脱燐スラグとカリ原料と成分調整剤とを
前記攪拌用ガスにて攪拌して融合させる工程と、融合し
て生成したスラグを冷却して固化させる工程と、からな
ることを特徴とするものである。In the method for producing a slow-release potash fertilizer according to the fourth aspect of the present invention, the potash raw material and the component modifier are added during the dephosphorization treatment of the hot metal using the stirring gas in the hot metal holding container to perform the dephosphorization treatment. The dephosphorization slag generated by the above, the potassium raw material and the component modifier are stirred and fused with the stirring gas, and a step of cooling and solidifying the slag generated by the fusion is characterized by comprising: To do.
【００１２】第５の発明による緩効性カリ肥料の製造方
法は、第１の発明又は第３の発明において、更に、前記
脱燐スラグとカリ原料とを融合させる工程とは別工程と
して、成分調整剤を添加する工程を有することを特徴と
するものである。当該成分調整剤添加工程は、脱燐スラ
グとカリ原料とを融合させる工程の後工程とするのが通
常であるが、溶銑の脱燐処理に支障のない限り、どの段
階で添加しても良い。The method for producing a slow-release potash fertilizer according to the fifth aspect of the present invention is the same as the first or third aspect of the present invention, further comprising adjusting the components as a step different from the step of fusing the dephosphorization slag and the potash raw material. It is characterized by having a step of adding an agent. The component adjusting agent adding step is usually performed after the step of fusing the dephosphorization slag and the potassium raw material, but may be added at any stage as long as it does not interfere with the dephosphorization treatment of the hot metal. .
【００１３】第６の発明による緩効性カリ肥料の製造方
法は、第２の発明、第４の発明、第５の発明の何れかに
おいて、前記成分調整剤はＳｉＯ2 を主成分とする物質
であることを特徴とするものである。The method for producing a slow-release potash fertilizer according to the sixth invention is the method according to any one of the second invention, the fourth invention, and the fifth invention, wherein the component modifier is a substance containing SiO 2 as a main component. It is characterized by being.
【００１４】第７の発明による緩効性カリ肥料の製造方
法は、第１の発明ないし第６の発明の何れかにおいて、
前記緩効性カリ肥料は燐の化合物を含有することを特徴
とするものである。A method for producing a slow-release potash fertilizer according to a seventh aspect is the method according to any one of the first to sixth aspects,
The slow-release potash fertilizer is characterized by containing a phosphorus compound.
【００１５】高炉及び転炉による銑鋼一貫製鉄法におい
ては、高炉から出銑された溶銑は転炉で脱炭されて溶鋼
になるが、近年、要求される製品の品質水準の上昇に伴
い鋼の低硫化、低燐化が求められ、そのため、硫黄及び
燐の除去効率の良い溶銑の段階で脱硫処理及び脱燐処理
が施されている。In the integrated pig iron manufacturing method using a blast furnace and a converter, the hot metal tapped from the blast furnace is decarburized into a molten steel in the converter, but in recent years, with the rise in the required quality level of products, Therefore, desulfurization treatment and dephosphorization treatment are carried out at the stage of hot metal with high removal efficiency of sulfur and phosphorus.
【００１６】この内、脱燐処理は溶銑を酸化して行う所
謂酸化精錬であるので、溶銑中の燐が酸化されてＰ2 Ｏ
5 が生成すると共に、溶銑中の珪素が酸化されてＳｉＯ
2 が生成する。この場合、マンガン等の酸素親和力の強
い元素も同様に酸化される。又、脱燐処理の際には、生
成するＰ2 Ｏ5 を吸収して脱燐反応を促進するため、石
灰系若しくはソーダ系の脱燐用フラックスが使用されて
いる。この脱燐用フラックスと生成したＳｉＯ2 やＰ2
Ｏ5 等とが融合し、脱燐処理により生成されるスラグ
（以下、「脱燐スラグ」と記す）は、脱燐用フラックス
成分（通常ＣａＯ：ソーダ系フラックスは高価であり、
安価な石灰系フラックスが用いられる）を主成分とし
て、ＳｉＯ2 、ＭｎＯ、Ｐ2 Ｏ5 、ＦｅＯ等を含む化合
物組成になる。Of these, the dephosphorization treatment is a so-called oxidative refining performed by oxidizing the hot metal, so the phosphorus in the hot metal is oxidized and P 2 O is added.
5 is generated, silicon in the hot metal is oxidized and SiO
2 produces. In this case, an element having a strong oxygen affinity such as manganese is also oxidized. Further, during the dephosphorization treatment, a lime-based or soda-based flux for dephosphorization is used in order to absorb the P 2 O 5 produced and accelerate the dephosphorization reaction. This dephosphorization flux and the generated SiO 2 and P 2
The slag produced by the dephosphorization treatment by fusion with O 5 and the like (hereinafter referred to as “dephosphorization slag”) is a flux component for dephosphorization (usually CaO: soda-based flux is expensive,
A low-cost lime-based flux is used as a main component, and the compound composition includes SiO 2 , MnO, P 2 O 5 , FeO, and the like.
【００１７】緩効性カリ肥料は、一般にＫ2 Ｏ及びＳｉ
Ｏ2 の他に、ＣａＯ、ＭｇＯ、Ｆｅ 2 Ｏ3 の１種以上の
成分を含有するク溶性カリ化合物で構成されている。従
って、脱燐スラグとカリ原料とを、溶銑中に吹き込む攪
拌用ガスにより強制的に攪拌して混合すれば、カリ原料
は加熱されて溶融・分解し、脱燐スラグと融合してク溶
性カリ化合物組成の溶融スラグが製造される。即ち、脱
燐処理後の脱燐スラグにカリ原料を添加して攪拌する、
又は、脱燐処理中の溶銑保持容器内にカリ原料を添加し
て攪拌すれば、緩効性カリ肥料が製造される。その際、
カリ原料の顕熱、潜熱、分解熱、及び脱燐スラグとの溶
解熱は、溶銑保持容器内で大量に共存する溶銑の保有熱
量で補われるので、特に加熱する必要はない。添加する
カリ原料としては、炭酸カリ、重炭酸カリ、硫酸カリ等
のカリ塩及びカリ長石等のカリ含有鉱物を使用する。The slow-release potassium fertilizer is generally K2 O and Si
O2 In addition to CaO, MgO, Fe 2 O3 One or more of
It is composed of a potassium soluble potassium compound containing components. Servant
Then, the dephosphorized slag and the potassium raw material are blown into the hot metal.
If it is forcibly stirred by the stir gas and mixed, the potassium raw material
Is heated and melted / decomposed, fused with dephosphorized slag and melted.
A molten slag having a composition of a potash compound is produced. That is,
The potassium raw material is added to the dephosphorized slag after the phosphorus treatment and stirred,
Alternatively, add the potassium raw material into the hot metal holding container during the dephosphorization process.
If stirred with stirring, a slow-release potash fertilizer is produced. that time,
Melting of potassium raw material with sensible heat, latent heat, decomposition heat, and dephosphorization slag
Decomposition is the heat retained by a large amount of hot metal that coexists in the hot metal holding container.
It does not need to be heated because it is supplemented by the amount. Added
Potassium raw materials include potassium carbonate, potassium bicarbonate, potassium sulfate, etc.
Potassium salt and potassium-containing minerals such as potassium feldspar are used.
【００１８】このように本発明では、緩効性カリ肥料の
主原料として溶銑の脱燐処理により生成する高温の脱燐
スラグを使用するので、脱燐スラグを加熱するための熱
量が不要であり、且つ、カリ原料の溶融、分解、融合に
要する熱量を溶銑が供給するので、極めて熱経済性が高
い。又、脱燐スラグの加熱時間が不要のために短時間で
製造され、そして、利材化が困難であった脱燐スラグを
有効活用することができると共に、新たに製造設備を設
けることなく、既存の製鉄設備で製造できる。As described above, in the present invention, since the high-temperature dephosphorization slag produced by the dephosphorization treatment of the hot metal is used as the main raw material of the slow-release potash fertilizer, the amount of heat for heating the dephosphorization slag is unnecessary, In addition, since the hot metal supplies the amount of heat required for melting, decomposing, and fusing the potassium raw material, the thermal economy is extremely high. Further, since the heating time of the dephosphorization slag is unnecessary, the dephosphorization slag was manufactured in a short time, and the dephosphorization slag, which was difficult to be used as a material, can be effectively used, without newly providing a manufacturing facility. Can be manufactured with existing steelmaking equipment.
【００１９】又、脱燐スラグには、植物にとって窒素や
カリウムと同様に極めて重要な元素である燐がＰ2 Ｏ5
の形態で含有されており、脱燐スラグから製造された緩
効性カリ肥料は燐肥料としての効果も兼ね備えている。
換言すれば、本発明により溶銑中の燐を燐肥料として有
効活用することが可能となる。In the dephosphorization slag, phosphorus which is an extremely important element for plants as well as nitrogen and potassium is P 2 O 5
The slow-release potash fertilizer produced from dephosphorized slag also has the effect as a phosphorus fertilizer.
In other words, according to the present invention, it becomes possible to effectively utilize phosphorus in hot metal as a phosphorus fertilizer.
【００２０】脱燐反応は脱燐スラグの塩基度（ＣａＯ／
ＳｉＯ2 ）に左右され、塩基度が高いほど反応効率が良
いとされている。そのため、例えば、塩基度が高く、緩
効性カリ肥料としてＳｉＯ2 分が不足する場合には、珪
砂や珪石等のＳｉＯ2 含有物質を緩効性カリ肥料の成分
調整剤として添加し、又、Ｆｅ2 Ｏ3 、ＭｇＯ等が不足
する場合には、それぞれ鉄鉱石、マグネシアクリンカー
等の所望する成分を含有する物質を緩効性カリ肥料の成
分調整剤として添加することにより、所定のク溶性カリ
化合物とすることができる。このように、成分調整剤
は、ＳｉＯ2 、Ｆｅ2 Ｏ3 、ＭｇＯの一種以上を主成分
とする物質を目的に応じて使用する。勿論、ＣａＯのた
めの成分調整剤として生石灰等を使用することもでき
る。成分調整剤が付着水を含有する場合には、乾燥して
から用いる方が良い。成分調整剤は搬送ガスにより溶銑
中に吹き込んで添加することが好ましい。これにより、
成分調整剤の溶融が促進され、迅速に所望するク溶性カ
リ化合物組成とすることができる。The dephosphorization reaction is carried out by adjusting the basicity of the dephosphorization slag (CaO /
It is said that the higher the basicity, the better the reaction efficiency, which depends on SiO 2 ). Therefore, for example, when the basicity is high and the SiO 2 content is insufficient as a slow-release potash fertilizer, a SiO 2 -containing substance such as silica sand or silica stone is added as a component adjuster for the slow-release potash fertilizer, and Fe 2 When O 3 , MgO, etc. are insufficient, a substance containing a desired component such as iron ore, magnesia clinker, etc. is added as a component adjusting agent for a slow-release potash fertilizer to obtain a predetermined soluble potassium compound. be able to. As described above, as the component adjusting agent, a substance containing one or more of SiO 2 , Fe 2 O 3 , and MgO as a main component is used according to the purpose. Of course, quicklime or the like can be used as a component adjusting agent for CaO. When the component adjusting agent contains attached water, it is better to use it after drying. The component modifier is preferably added by blowing it into the hot metal by a carrier gas. This allows
The melting of the component modifier is promoted, and the desired cuprous soluble potassium compound composition can be quickly obtained.
【００２１】これら成分調整剤の中で、珪素は植物体を
強化し、病害虫への抵抗性を強める効果があり、そのた
め、ＳｉＯ2 を含有する緩効性カリ肥料は珪酸肥料とし
ての特性をも有する必要があり、可溶性珪酸を２５mass
％以上含有することが決められている。従って、珪砂や
珪石等のＳｉＯ2 を主成分とする物質を成分調整剤とし
て添加することは、緩効性カリ肥料に珪酸肥料としての
特性を付加させることが可能となり、緩効性カリ肥料と
して特に重要である。そして、脱燐処理後の脱燐スラグ
にＳｉＯ2 を主成分とする物質を成分調整剤として添加
して緩効性カリ肥料を製造する場合には、緩効性カリ肥
料の組成に配慮することなく、脱燐スラグの塩基度を高
くすることができるので、脱燐反応を効率良く実施させ
ることができる。Among these component modifiers, silicon has the effect of strengthening the plant body and strengthening the resistance to pests. Therefore, the slow-release potash fertilizer containing SiO 2 also has the property of silicic acid fertilizer. Must have 25mass soluble silica
% Or more is determined. Therefore, the addition of a substance containing SiO 2 as a main component, such as silica sand or silica stone, as a component adjusting agent makes it possible to add the properties of silicic acid fertilizer to slow-release potash fertilizer, which is particularly important as slow-release potash fertilizer. Is. When a substance having SiO 2 as a main component is added to the dephosphorized slag after the dephosphorization treatment as a component modifier to produce a slow-release potash fertilizer, without considering the composition of the slow-release potash fertilizer, Since the basicity of the dephosphorization slag can be increased, the dephosphorization reaction can be efficiently carried out.
【００２２】又、マグネシウムは植物中の葉緑素を構成
する重要な元素であり、従って、マグネシウムの化合物
を含有する物質を成分調整剤として添加することも、緩
効性カリ肥料として有効である。マグネシウムの化合物
とは、マグネシウムの酸化物、炭酸塩、塩化物等であ
り、マグネシウムの化合物を含む物質としては、上述の
マグネシアクリンカーの他に、ドロマイト（ＣａＣＯ3
−ＭｇＣＯ3 ）や蛇紋岩（ＭｇＯ−ＳｉＯ2 ）等であ
る。Magnesium is an important element that constitutes chlorophyll in plants. Therefore, addition of a substance containing a magnesium compound as a component modifier is also effective as a slow-release potash fertilizer. The magnesium compound is an oxide, carbonate, chloride or the like of magnesium, and as the substance containing the magnesium compound, in addition to the above-mentioned magnesia clinker, dolomite (CaCO 3
-MgCO 3) is and serpentine (MgO-SiO 2) and the like.
【００２３】[0023]
【発明の実施の形態】以下、添付図面を参照して本発明
の実施の形態を説明する。図１は、本発明を実施する際
に用いた溶銑の脱燐処理設備の例を示す概略図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic view showing an example of a hot metal dephosphorization treatment facility used when carrying out the present invention.
【００２４】図１に示すように、高炉（図示せず）から
出銑された溶銑２を収納する取鍋型の溶銑保持容器１
は、台車３に搭載されて脱燐処理設備に搬送される。脱
燐処理設備には、上吹き酸素ランス６とインジェクショ
ンランス７とが設置されており、上吹き酸素ランス６及
びインジェクションランス７は、溶銑保持容器１内を上
下移動可能となっている。尚、溶銑保持容器１は台車３
に搭載されて高炉から溶銑処理設備及び転炉（図示せ
ず）へと搬送される。As shown in FIG. 1, a ladle-type hot metal holding container 1 for containing hot metal 2 tapped from a blast furnace (not shown)
Is loaded on the carriage 3 and transported to the dephosphorization treatment facility. An upper-blown oxygen lance 6 and an injection lance 7 are installed in the dephosphorization treatment facility, and the upper-blown oxygen lance 6 and the injection lance 7 are vertically movable in the hot metal holding container 1. The hot metal holding container 1 is a trolley 3
And is transported from the blast furnace to the hot metal treatment facility and converter (not shown).
【００２５】インジェクションランス７は、貯蔵タンク
１０とリフトタンク１３とディスペンサー１６、及び、
貯蔵タンク１１とリフトタンク１４とディスペンサー１
６、更に、貯蔵タンク１２とリフトタンク１５とディス
ペンサー１６とから構成される３系統の原料供給設備と
接続され、貯蔵タンク１０に収納された粉体状のカリ原
料５と、貯蔵タンク１１に収納された粉体状の成分調整
剤８と、貯蔵タンク１２に収納された粉体状の脱燐用フ
ラックス９とを、窒素ガスを搬送ガスとしてインジェク
ションランス７の先端から溶銑２中に吹き込み添加する
ことができる。この場合、インジェクションランス７の
先端位置を調整すれば、脱燐スラグ４中にも吹き込むこ
とができ、又、インジェクションランス７の先端を脱燐
スラグ４の直上に配置することで、カリ原料５及び成分
調整剤８を窒素ガスと共に脱燐スラグ４に投射して添加
することもできる。貯蔵タンク１０内のカリ原料５と、
貯蔵タンク１１内の成分調整剤８と、貯蔵タンク１２内
の脱燐用フラックス９とは、リフトタンク１３，１４，
１５によってそれぞれ独立に添加量及び添加時間を制御
して吹き込むことができ、又、インジェクションランス
７から窒素ガスのみを吹き込んで溶銑２を攪拌すること
もできるようになっている。脱燐用フラックス９は脱燐
反応を促進するために使用するもので、主に生石灰が用
いられ、スラグの融点を調整するための蛍石を併用する
場合もある。The injection lance 7 includes a storage tank 10, a lift tank 13, a dispenser 16, and
Storage tank 11, lift tank 14, and dispenser 1
6. Further, the powdery potassium raw material 5 stored in the storage tank 10 and the storage tank 11 are connected to the three systems of raw material supply equipment including the storage tank 12, the lift tank 15, and the dispenser 16. The powdered component adjusting agent 8 and the powdered dephosphorization flux 9 stored in the storage tank 12 are added by blowing them into the hot metal 2 from the tip of the injection lance 7 using nitrogen gas as a carrier gas. be able to. In this case, if the tip position of the injection lance 7 is adjusted, it can be blown into the dephosphorization slag 4 as well. By disposing the tip of the injection lance 7 directly above the dephosphorization slag 4, It is also possible to add the component adjusting agent 8 by spraying it onto the dephosphorization slag 4 together with the nitrogen gas. Potash raw material 5 in the storage tank 10,
The component adjusting agent 8 in the storage tank 11 and the dephosphorization flux 9 in the storage tank 12 are connected to the lift tanks 13, 14,
It is possible to independently control the addition amount and the addition time by 15 and to inject, and to inject only the nitrogen gas from the injection lance 7 to agitate the hot metal 2. The dephosphorization flux 9 is used to accelerate the dephosphorization reaction, and quicklime is mainly used, and fluorite for adjusting the melting point of the slag may be used together.
【００２６】脱燐処理設備には、更に、ホッパー１７，
１８，１９と切り出し装置２１，２２，２３と原料搬送
装置２４とシュート２５とからなる原料供給設備が設置
されており、この原料供給設備によってホッパー１７内
のカリ原料５、ホッパー１８内の脱燐用フラックス９、
及びホッパー１９内の固体酸素源２０を溶銑保持容器１
内に上置き添加することができる。固体酸素源２０は脱
燐反応を生じさせる酸素源となるもので、ミルスケール
や鉄鉱石等が用いられる。ホッパー１７，１８，１９内
に収納されるカリ原料５、脱燐用フラックス９及び固体
酸素源２０は通常その形態が塊状のものが用いられる。
図には示していないが、粉体状の固体酸素源２０をイン
ジェクションランス７から溶銑２中に吹き込み添加して
も良い。The dephosphorization treatment facility is further provided with a hopper 17,
A raw material supply equipment including 18, 19, a cutting device 21, 22, 23, a raw material conveying device 24, and a chute 25 is installed. With this raw material supply equipment, the potassium raw material 5 in the hopper 17 and the dephosphorization in the hopper 18 are installed. Flux 9 for
The solid oxygen source 20 in the hopper 19 and the hot metal holding container 1
It can be added over. The solid oxygen source 20 serves as an oxygen source that causes a dephosphorization reaction, and mill scale, iron ore, or the like is used. As the potassium raw material 5, the dephosphorization flux 9 and the solid oxygen source 20 which are housed in the hoppers 17, 18 and 19, those having a bulky form are usually used.
Although not shown in the figure, a powdery solid oxygen source 20 may be added by blowing it from the injection lance 7 into the hot metal 2.
【００２７】このような構成の脱燐処理設備を用いて、
ク溶性カリ化合物組成の溶融スラグを製造する方法を以
下に説明する。By using the dephosphorization treatment equipment having such a constitution,
A method for producing a molten slag having a soluble potassium compound composition will be described below.
【００２８】先ず最初に、脱燐処理後にカリ原料５及び
成分調整剤８を添加してク溶性カリ化合物組成の溶融ス
ラグを製造する方法について説明する。First of all, a method for producing a molten slag having a composition of a fusible potassium compound by adding the potassium raw material 5 and the component modifier 8 after the dephosphorization treatment will be described.
【００２９】溶銑保持容器１内における溶銑２の脱燐処
理の前に、溶銑保持容器１内に高炉スラグ等が残留する
場合には、その量及び組成を把握する。残留スラグ量
は、スラグ厚さの測定又は溶銑２の湯面を覆う残留スラ
グの面積率の目視観察により把握することができる。ス
ラグ組成は分析して把握する。但し、通常、脱燐処理前
に溶銑保持容器１内のスラグは排出される（「排滓処
理」と云う）場合が多く、排滓処理された場合には、ス
ラグが残留していても生成される脱燐スラグ４の組成に
及ぼす影響が小さいので、残留スラグの量及び組成を把
握する必要はない。Before the dephosphorization treatment of the hot metal 2 in the hot metal holding container 1, if the blast furnace slag or the like remains in the hot metal holding container 1, the amount and composition thereof are grasped. The residual slag amount can be grasped by measuring the slag thickness or visually observing the area ratio of the residual slag covering the molten metal surface of the hot metal 2. The slag composition is analyzed and understood. However, the slag in the hot metal holding container 1 is usually discharged before the dephosphorization treatment (referred to as "slag treatment"), and when the slag treatment is performed, even if the slag remains, it is generated. Since the influence on the composition of the dephosphorized slag 4 to be treated is small, it is not necessary to grasp the amount and composition of the residual slag.
【００３０】そして、脱燐処理を行なう。脱燐処理は、
例えば、ホッパー１８内の脱燐用フラックス９とホッパ
ー１９内の固体酸素源２０とをシュート２５より溶銑保
持容器１内に上置き添加すると共に、上吹き酸素ランス
６から気体酸素源としての酸素ガスを溶銑２の湯面に吹
き付け、更に、インジェクションランス７から窒素ガス
を吹き込んで溶銑２と脱燐用フラックス９及び固体酸素
源２０とを攪拌混合させて行なう。この場合に、インジ
ェクションランス７を介して貯蔵タンク１２内の脱燐用
フラックス９を溶銑２中に吹き込んでも良い。酸素ガス
及び固体酸素源２０中の酸素は、溶銑２中の燐と反応し
てＰ2 Ｏ5 が生成され、生成したＰ2 Ｏ 5 は脱燐用フラ
ックス９中に取り込まれ、溶銑２の脱燐処理が行われ、
同時に、酸素ガス及び固体酸素源２０中の酸素は溶銑２
中の珪素と反応してＳｉＯ2 を生成し、生成したＳｉＯ
2 は脱燐用フラックス９と混合・融合し、こうして、溶
銑２上に脱燐スラグ４が生成される。脱燐スラグ４は脱
燐用フラックス９、例えばＣａＯを主成分とする組成に
なる。Then, a dephosphorization process is performed. Dephosphorization treatment is
For example, the dephosphorization flux 9 in the hopper 18 and the hopper
-The solid oxygen source 20 in 19 is protected by hot metal from the chute 25.
Place it in the holding container 1 and add it at the same time.
Blowing oxygen gas as a source of gaseous oxygen from 6 onto the surface of the hot metal 2
Tightening and nitrogen gas from the injection lance 7
By blowing in hot metal 2, dephosphorization flux 9 and solid oxygen
This is performed by mixing the source 20 with stirring. In this case,
For dephosphorization in the storage tank 12 via the injection lance 7.
The flux 9 may be blown into the hot metal 2. Oxygen gas
And the oxygen in the solid oxygen source 20 reacts with the phosphorus in the hot metal 2.
P2 OFive Is generated, and the generated P2 O Five Is a dephosphorization fla
Incorporated into Cux9, dephosphorization of hot metal 2 is performed,
At the same time, the oxygen gas and the oxygen in the solid oxygen source 20 are hot metal 2
SiO reacts with silicon in2 To produce SiO
2 Is mixed and fused with the flux 9 for dephosphorization,
Dephosphorization slag 4 is produced on the pig iron 2. Dephosphorization slag 4 is removed
Phosphorus flux 9 such as CaO-based composition
Become.
【００３１】そして、脱燐処理後、添加した脱燐用フラ
ックス９の量と組成、脱燐処理により生成したＳｉＯ2
量、脱燐処理前に把握した残留スラグの量と組成に基づ
き、脱燐スラグ４の概略組成及び概略質量を把握する。
生成したＳｉＯ2 量は、脱燐処理前後の溶銑２の珪素濃
度から把握することができる。この場合、脱燐スラグ４
の質量をスラグ厚さの測定等から把握し、且つ、脱燐ス
ラグ４から分析試料を採取して成分分析すれば、脱燐ス
ラグ４の正確な量及び組成を把握することができる。こ
のように、脱燐処理後に脱燐スラグ４から分析試料を採
取して成分を分析する場合には、排滓処理の有無に拘わ
らず脱燐処理前に溶銑保持容器１内の残留スラグの量及
び組成を把握する必要はない。After the dephosphorization treatment, the amount and composition of the added dephosphorization flux 9 and the SiO 2 produced by the dephosphorization treatment
Based on the amount and the amount and composition of the residual slag obtained before the dephosphorization treatment, the approximate composition and approximate mass of the dephosphorization slag 4 are determined.
The amount of SiO 2 produced can be grasped from the silicon concentration of the hot metal 2 before and after the dephosphorization treatment. In this case, dephosphorization slag 4
The accurate amount and composition of the dephosphorization slag 4 can be grasped if the mass of the dephosphorization slag 4 is grasped from the measurement of the slag thickness and the analysis sample is taken from the dephosphorization slag 4 for component analysis. As described above, when the analysis sample is taken from the dephosphorization slag 4 after the dephosphorization process and the components are analyzed, the amount of the residual slag in the hot metal holding container 1 before the dephosphorization process is performed regardless of the presence or absence of the slag treatment. And it is not necessary to know the composition.
【００３２】把握した脱燐スラグ４の質量と組成とか
ら、カリ原料５の添加量、並びに必要な場合には成分調
整剤８の添加量を決定する。From the grasped mass and composition of the dephosphorization slag 4, the addition amount of the potassium raw material 5 and, if necessary, the addition amount of the component adjusting agent 8 are determined.
【００３３】そして、所定量のカリ原料５、並びに必要
に応じて所定量の成分調整剤８を溶銑保持容器１内に添
加し、緩効性カリ肥料の製造を開始する。尚、カリ原料
５の添加前に、インジェクションランス７から窒素ガス
を溶銑２中に吹き込むことが望ましい。窒素ガスを吹き
込むことで、溶銑２と脱燐スラグ４とが攪拌され、脱燐
スラグ４が溶融されると共に脱燐スラグ４の組成が均一
化され、その後のク溶性カリ化合物組成の溶融スラグの
製造が容易となるからである。Then, a predetermined amount of the potassium raw material 5 and, if necessary, a predetermined amount of the component adjusting agent 8 are added into the hot metal holding container 1 to start the production of the slow-release potassium fertilizer. Before adding the potassium raw material 5, it is desirable to blow nitrogen gas into the hot metal 2 from the injection lance 7. By blowing nitrogen gas, the hot metal 2 and the dephosphorization slag 4 are agitated, the dephosphorization slag 4 is melted, and the composition of the dephosphorization slag 4 is made uniform. This is because manufacturing becomes easy.
【００３４】一般にカリ原料５は融点が低く蒸気圧が高
いため、溶銑２にふれると脱燐スラグ４と融合する前に
蒸発して歩留りの低下を来す。従って、カリ原料５の歩
留り向上のために、シュート２５を介して溶銑保持容器
１内に上置き添加することが好ましい。カリ原料５を脱
燐スラグ４上に上置き添加すれば、カリ原料５が直ちに
脱燐スラグ４と融合して脱燐スラグ４中でＫ2 Ｏとして
安定化するため、蒸発量が少なくなり歩留りが向上す
る。但し、粉体状のカリ原料５を上置きすると粉塵が発
生するので、上置きする際には、カリ原料５を予めブリ
ケット等の成形体として添加することが好ましい。図１
はカリ原料５を上置き添加した状態を示している。Generally, since the potassium raw material 5 has a low melting point and a high vapor pressure, if it touches the hot metal 2, it will evaporate before it fuses with the dephosphorization slag 4 and the yield will decrease. Therefore, in order to improve the yield of the potassium raw material 5, it is preferable to add the potassium raw material 5 in the hot metal holding container 1 via the chute 25. If the potassium raw material 5 is overlaid on the dephosphorization slag 4 and the potassium raw material 5 is immediately fused with the dephosphorization slag 4 and stabilized as K 2 O in the dephosphorization slag 4, the evaporation amount is reduced and the yield is increased. Is improved. However, since dust is generated when the powdery potassium raw material 5 is placed on top, it is preferable to add the potassium raw material 5 in advance as a molded body such as a briquette when placing it on top. Figure 1
Shows the state in which the potassium raw material 5 was added on top.
【００３５】カリ原料５をブリケット等の成形体にすれ
ば、その分、製造工程が煩雑になり、製造コストも上昇
する。そこで、粉体状のカリ原料５を添加する場合に
は、発生する粉塵を防止するために、カリ原料５を搬送
ガスによりインジェクションランス７を介して溶銑２中
又は脱燐スラグ４中に吹き込み添加するか、若しくは、
脱燐スラグ４に投射して添加することが好ましい。カリ
原料５を脱燐スラグ４中に直接添加した場合には、カリ
原料５が直ちに脱燐スラグ４と融合して脱燐スラグ４中
でＫ2 Ｏとして安定化するため、カリ原料５の歩留りが
向上する。If the potassium raw material 5 is formed into a molded product such as a briquette, the manufacturing process becomes complicated and the manufacturing cost increases accordingly. Therefore, when the powdery potassium raw material 5 is added, the potassium raw material 5 is blown into the molten pig iron 2 or the dephosphorization slag 4 through the injection lance 7 by the carrier gas in order to prevent the generated dust. Or
It is preferable to add it by projecting it onto the dephosphorization slag 4. When the potassium raw material 5 is directly added to the dephosphorization slag 4, the potassium raw material 5 immediately fuses with the dephosphorization slag 4 and is stabilized as K 2 O in the dephosphorization slag 4, so the yield of the potassium raw material 5 is increased. Is improved.
【００３６】成分調整剤８は、成分調整剤８の溶融が促
進され、迅速に所望するスラグ組成とすることができる
ので、インジェクションランス７から溶銑２中に吹き込
み添加することが好ましい。カリ原料５と成分調整剤８
の添加順序は任意であるが、カリ原料５の添加前に所定
量の成分調整剤８を添加し、その後、カリ原料５の添加
を開始することが望ましい。脱燐スラグ４が所定の成分
に調整されているために、カリ原料５と脱燐スラグ４と
の融合が促進され、カリ原料５が高温の状態で保持され
る期間が減少してカリ原料５中のカリウムの蒸発量が少
なくなり、カリ原料５の歩留りが向上するためである。The component modifier 8 is preferably added by being blown from the injection lance 7 into the hot metal 2 because the melting of the component modifier 8 is promoted and the desired slag composition can be quickly obtained. Potassium raw material 5 and ingredient adjuster 8
Although the addition order of is arbitrary, it is preferable to add a predetermined amount of the component adjusting agent 8 before adding the potassium raw material 5, and then start adding the potassium raw material 5. Since the dephosphorization slag 4 is adjusted to a predetermined component, the fusion of the potassium raw material 5 and the dephosphorization slag 4 is promoted, and the period during which the potassium raw material 5 is kept at a high temperature is reduced to reduce the potassium raw material 5. This is because the evaporation amount of potassium in the inside is reduced and the yield of the potassium raw material 5 is improved.
【００３７】但し、珪砂や珪石等のＳｉＯ2 を主成分と
する物質を成分調整剤８として添加する場合には、カリ
原料５を添加した後に成分調整剤８を添加すること、又
は、カリ原料５を添加し、脱燐スラグ４とカリ原料５と
を融合させ、融合して生成させた溶融状態のスラグを溶
銑保持容器１から取り出し、取り出されたスラグ内に添
加することが好ましい。ＳｉＯ2 を主成分とする物質を
成分調整剤８として添加した場合、スラグの塩基度が低
下して、スラグ中の燐が溶銑２に移行する（「復燐現
象」と云う）懸念があるが、このようにして添加するこ
とで、この現象が防止される。特に、取り出されたスラ
グ内に添加する場合には復燐現象を完全に防止すること
ができる。However, when a substance containing SiO 2 as a main component such as silica sand or silica stone is added as the component adjusting agent 8, the component adjusting agent 8 is added after adding the potassium raw material 5, or the potassium raw material is added. It is preferable that 5 is added to fuse the dephosphorization slag 4 and the potassium raw material 5 and the molten slag produced by the fusion is taken out from the hot metal holding container 1 and added into the taken out slag. When a substance containing SiO 2 as a main component is added as the component adjusting agent 8, there is a concern that the basicity of the slag is lowered and phosphorus in the slag is transferred to the hot metal 2 (referred to as “recondensation phenomenon”). By adding in this way, this phenomenon is prevented. In particular, when added to the taken-out slag, the re-phosphorus phenomenon can be completely prevented.
【００３８】カリ原料５又は成分調整剤８の添加完了
後、更にインジェクションランス７から窒素ガスを溶銑
２中に吹き込み、脱燐スラグ４とカリ原料５又は成分調
整剤８とを溶銑２と共に混合し、脱燐スラグ４とカリ原
料５又は成分調整剤８との融合を促進すると共に、生成
する溶融スラグの組成を均一化することが好ましい。After the addition of the potassium raw material 5 or the component adjusting agent 8 is completed, nitrogen gas is further blown into the hot metal 2 from the injection lance 7 to mix the dephosphorized slag 4 with the potassium raw material 5 or the component adjusting agent 8 together with the hot metal 2. It is preferable to promote the fusion of the dephosphorization slag 4 and the potassium raw material 5 or the component adjuster 8 and make the composition of the molten slag to be uniform.
【００３９】脱燐処理後に添加されたカリ原料５及び成
分調整剤８は、このようにして脱燐スラグ４と融合し、
ク溶性カリ化合物組成の溶融スラグが製造される。The potassium raw material 5 and the component adjusting agent 8 added after the dephosphorization treatment are fused with the dephosphorization slag 4 in this way,
A molten slag having a composition of a soluble potassium compound is produced.
【００４０】脱燐反応は、脱燐スラグ４の塩基度（Ｃａ
Ｏ／ＳｉＯ2 ）が高いほど促進する。一方、緩効性カリ
肥料はその組成範囲が決められている。具体的には、緩
効性カリ肥料としては、ク溶性カリを２０mass％以上含
有すること、可溶性珪酸を２５mass％以上含有するこ
と、及びアルカリを１５mass％以上含有すること等であ
る。The dephosphorization reaction is carried out by using the basicity (Ca
The higher the O / SiO 2 ) is, the more accelerated it is. On the other hand, the composition range of the slow-release potash fertilizer is determined. Specifically, the slow-release potash fertilizer contains 20 mass% or more of soluble potassium, 25 mass% or more of soluble silicic acid, and 15 mass% or more of alkali.
【００４１】上記に説明したク溶性カリ化合物組成の溶
融スラグの製造方法では、脱燐処理後、生成した脱燐ス
ラグ４にカリ原料５及び成分調整剤８を添加してク溶性
カリ化合物組成の溶融スラグを製造するので、脱燐処理
においては、ク溶性カリ化合物の組成を配慮することな
く、脱燐反応に最適なスラグ組成の条件で精錬すること
ができる。即ち、塩基度が３〜５の脱燐スラグ４を用い
て精錬することができる。勿論、ＳｉＯ2 源の成分調整
剤８の使用量を削減するために、塩基度を２．０程度ま
で低くした精錬も可能である。In the method for producing molten slag having the composition of the soluble potassium compound described above, after the dephosphorization treatment, the raw material 5 and the component modifier 8 are added to the produced dephosphorized slag 4 to obtain the composition of the soluble potassium compound. Since the molten slag is produced, in the dephosphorization treatment, the slag composition can be refined under the conditions of the optimum slag composition for the dephosphorization reaction without considering the composition of the potassium-soluble potassium compound. That is, it can be refined using the dephosphorization slag 4 having a basicity of 3 to 5. Of course, in order to reduce the amount of the component adjusting agent 8 of the SiO 2 source used, refining with a basicity as low as about 2.0 is possible.
【００４２】次に、脱燐処理中にカリ原料５及び成分調
整剤８を添加して、ク溶性カリ化合物組成の溶融スラグ
を製造する方法について説明する。Next, a method of producing the molten slag having the composition of the potassium soluble potassium compound by adding the potassium raw material 5 and the component adjusting agent 8 during the dephosphorization treatment will be described.
【００４３】脱燐処理の前に、上記の方法に従って残留
する高炉スラグ等の量及び組成を把握する。そして、上
記の方法に従って脱燐処理を行うが、脱燐処理中にカリ
原料５及び成分調整剤８をインジェクションランス７又
はシュート２５より添加する。この場合、カリ原料５及
び成分調整剤８の添加量は、次のようにして決める。即
ち、用いる脱燐用フラックス９の量及び組成、脱燐処理
により生成されるＳｉＯ2 の予測量、及び、脱燐処理前
に把握した残留スラグの量及び組成に基づき、脱燐処理
により生成する脱燐スラグ４の概略組成及び概略質量を
把握し、そして、把握した脱燐スラグ４の概略質量と概
略組成とから、カリ原料５の添加量と、必要な場合には
成分調整剤８の添加量とを決定する。Before the dephosphorization treatment, the amount and composition of residual blast furnace slag and the like are grasped according to the above method. Then, the dephosphorization treatment is performed according to the above method, and the potassium raw material 5 and the component adjusting agent 8 are added from the injection lance 7 or the chute 25 during the dephosphorization treatment. In this case, the addition amounts of the potassium raw material 5 and the component adjusting agent 8 are determined as follows. That is, based on the amount and composition of the dephosphorization flux 9 used, the predicted amount of SiO 2 produced by the dephosphorization process, and the amount and composition of the residual slag grasped before the dephosphorization process, it is produced by the dephosphorization process. Grasping the approximate composition and mass of the dephosphorization slag 4, and adding the amount of potassium raw material 5 and, if necessary, the component adjuster 8 based on the determined mass and composition of the dephosphorization slag 4. Determine the quantity and.
【００４４】この場合、脱燐処理と同時にク溶性カリ化
合物組成の溶融スラグを生成する場合と、脱燐処理中に
はカリ原料５のみを添加し、脱燐処理後に更に成分調整
剤８を添加してク溶性カリ化合物組成の溶融スラグを生
成する場合の２種類の方法で製造することができる。In this case, when the molten slag having the composition of the potassium-soluble potassium compound is produced at the same time as the dephosphorization treatment, and only the potassium raw material 5 is added during the dephosphorization treatment, and the component adjusting agent 8 is further added after the dephosphorization treatment. Then, it can be manufactured by two kinds of methods in the case of producing a molten slag having a composition of a soluble potassium compound.
【００４５】前述したように、緩効性カリ肥料はク溶性
カリを２０mass％以上含有し且つ可溶性珪酸を２５mass
％以上含有する必要があり、更に、脱燐スラグ４の場合
にはＰ2 Ｏ5 やＦｅＯ、及びＭｎＯ等の酸化物が合計１
０〜１７mass％含有されるので、脱燐処理と同時にク溶
性カリ化合物組成の溶融スラグを生成する場合には、Ｋ
2 Ｏ及びＳｉＯ2 の含有量を確保するためにＣａＯ含有
量の上限があり、脱燐スラグ４の塩基度を１．５以下に
抑えて脱燐処理を行う必要がある。即ち、脱燐用フラッ
クス９の使用量を抑えて精錬する必要がある。この製造
方法の場合には、脱燐スラグ４の組成を脱燐反応に最適
な組成とすることはできないが、脱燐処理とク溶性カリ
化合物の製造とを同時に行うことが可能であり、脱燐処
理後にカリ原料５又は成分調整剤８を添加して製造する
方法に比較して工程短縮化の利点がある。As described above, the slow-release potash fertilizer contains 20 mass% or more of soluble potassium and 25 mass% of soluble silicic acid.
%, And in the case of dephosphorization slag 4, the total amount of oxides such as P 2 O 5 , FeO and MnO is 1
Since 0 to 17 mass% is contained, if a molten slag having a composition of a fusible potassium compound is produced at the same time as the dephosphorization treatment, K
There is an upper limit of the CaO content in order to secure the contents of 2 O and SiO 2 , and it is necessary to perform the dephosphorization treatment while suppressing the basicity of the dephosphorization slag 4 to 1.5 or less. That is, it is necessary to suppress the amount of the flux 9 for dephosphorization to be refined. In the case of this production method, the composition of the dephosphorization slag 4 cannot be set to the optimum composition for the dephosphorization reaction, but it is possible to carry out the dephosphorization treatment and the production of the soluble potassium compound at the same time. There is an advantage of shortening the process as compared with the method of manufacturing by adding the potassium raw material 5 or the component adjusting agent 8 after the phosphorus treatment.
【００４６】一方、脱燐処理後に更に成分調整剤８を添
加してク溶性カリ化合物組成の溶融スラグを生成する場
合には、ク溶性カリ化合物の組成を配慮することなく、
脱燐反応に最適なスラグ組成の条件で脱燐処理すること
ができる。即ち、塩基度が３〜５の脱燐スラグ４を用い
て精錬することができる。この場合には、珪砂や珪石等
のＳｉＯ2 を主成分とする物質を成分調整剤８として添
加することになり、復燐現象を完全に防止するために
は、前述したように、溶融状態のスラグを溶銑保持容器
１から取り出し、取り出されたスラグ内にＳｉＯ2 を主
成分とする物質を添加することが好ましい。On the other hand, when the component modifier 8 is further added after the dephosphorization treatment to form the molten slag having the composition of the potassium-soluble potassium compound, the composition of the potassium-soluble potassium compound is not taken into consideration.
The dephosphorization treatment can be performed under the conditions of the optimum slag composition for the dephosphorization reaction. That is, it can be refined using the dephosphorization slag 4 having a basicity of 3 to 5. In this case, a substance containing SiO 2 as a main component, such as silica sand or silica stone, is added as the component adjusting agent 8. In order to completely prevent the rephosphorization phenomenon, as described above, It is preferable to take out the slag from the hot metal holding container 1 and add a substance containing SiO 2 as a main component into the taken out slag.
【００４７】カリ原料５の上置き添加とブリケット等の
成形体化、及び、成分調整剤８のインジェクションラン
ス７による吹き込み添加は、前述した理由で好ましい。
又、粉体状のカリ原料５を添加する場合には、搬送ガス
を用いてインジェクションランス７から、溶銑２中又は
脱燐スラグ４中に吹き込み添加するか、若しくは、脱燐
スラグ４に投射して添加することが好ましい。但し、脱
燐スラグ４中又は脱燐スラグ４に投射して添加する場合
には、所定量のカリ原料５の添加完了後、インジェクシ
ョンランス７を溶銑２中に下降して、溶銑２の攪拌を図
ることとする。そして、脱燐処理を所定時間実施して作
業を終了する。The above-mentioned addition of the potassium raw material 5 and the formation of a molded body such as a briquette, and the addition of the component adjusting agent 8 blown by the injection lance 7 are preferable for the reasons described above.
Further, when the powdery potassium raw material 5 is added, the carrier gas is used to blow it from the injection lance 7 into the hot metal 2 or the dephosphorization slag 4 or the dephosphorization slag 4 is projected. It is preferable to add it. However, in the case of adding into the dephosphorization slag 4 or by projecting onto the dephosphorization slag 4, after the completion of addition of a predetermined amount of the potassium raw material 5, the injection lance 7 is lowered into the hot metal 2 to stir the hot metal 2. It will be decided. Then, the dephosphorization process is performed for a predetermined time, and the work is completed.
【００４８】カリ原料５及び成分調整剤８は、このよう
にして脱燐スラグ４と融合し、ク溶性カリ化合物組成の
溶融スラグが製造される。The potassium raw material 5 and the component adjusting agent 8 are thus fused with the dephosphorization slag 4 to produce a molten slag having a composition of a fusible potassium compound.
【００４９】次いで、上記のようにして融合して生成し
たク溶性カリ化合物組成の溶融スラグを冷却して固化さ
せる。冷却・固化は、溶銑保持容器１から取り出す際に
行なっても、又、別の容器に収納した後、その容器から
取り出す際に行なっても、何方でも良い。Next, the molten slag having the composition of the fusible potassium compound produced by fusing as described above is cooled and solidified. The cooling and solidification may be performed either when the hot metal holding container 1 is taken out, or when the hot metal holding container 1 is put in another container and then taken out of the container.
【００５０】冷却固化の方法は、生成した溶融スラグに
高圧空気を吹きつけて飛散させ、冷却すると同時に粒状
化する方法（「風砕法」と云う）、あるいは高圧水を吹
きつけて飛散させ、冷却すると同時に粒状化する方法
（「水砕法」と云う）、あるいは生成した溶融スラグを
厚鋼板上に流出させ、厚鋼板による強制冷却と空気への
放熱により冷却する方法等があり、何れの方法でも可能
だが、緩効性カリ肥料中の水溶性カリも肥料としては重
要であり、水砕法では水溶性カリが減少する虞があるた
め、水量を適正化し、冷却水が蒸発して残留する冷却水
を極力少なくした冷却方法が好ましい。冷却、固化後の
形状が塊状の場合には、破砕して所定の寸法に整粒し、
緩効性カリ肥料とする。溶銑２は次の処理工程に送られ
る。The cooling and solidifying method is carried out by blowing high-pressure air to the generated molten slag to scatter it, and at the same time cooling it into granules (referred to as "air-crushing method"), or blowing high-pressure water to scatter and cool it. At the same time, there is a method of granulating (called "water granulation method") or a method of causing the generated molten slag to flow out onto a thick steel plate and cooling it by forced cooling by the thick steel plate and heat dissipation to the air. Although it is possible, water-soluble potassium in slow-release potassium fertilizer is also important as a fertilizer, and water-soluble potassium may decrease in the water granulation method.Therefore, the amount of water is optimized and the cooling water that evaporates and remains A cooling method which is as small as possible is preferable. If the shape after cooling and solidification is lumpy, it is crushed and sized to a predetermined size,
Use a slow-release potash fertilizer. The hot metal 2 is sent to the next processing step.
【００５１】このように、本発明によれば、既設の製鉄
設備を用い、極めて熱経済性が高く且つ短時間の内に燐
を含有する緩効性カリ肥料の製造が可能になり、その結
果、緩効性カリ肥料の製造コストを大幅に低減すること
ができる。As described above, according to the present invention, it is possible to produce a slow-release potassium fertilizer containing phosphorus in a short period of time with extremely high thermoeconomical efficiency by using the existing steelmaking equipment. The production cost of slow-release potash fertilizer can be significantly reduced.
【００５２】尚、上記説明は、脱燐処理を取鍋型の溶銑
保持容器１で実施した場合であるが、溶銑保持容器１は
上記の取鍋型に限るものではなく、トーピードカーであ
っても更に転炉型容器であっても構わない。又、脱燐処
理の前に脱硫処理を予め施してあっても、本発明は上記
に従って何ら支障なく実施できる。更に、脱燐処理設備
と緩効性カリ肥料の製造設備とを分離しても良い。The above description is for the case where the dephosphorization process is performed in the ladle type hot metal holding container 1, but the hot metal holding container 1 is not limited to the above ladle type, and may be a torpedo car. Further, it may be a converter type container. Further, even if the desulfurization treatment is performed in advance before the dephosphorization treatment, the present invention can be carried out according to the above without any trouble. Further, the dephosphorization treatment facility and the slow-release potash fertilizer production facility may be separated.
【００５３】[0053]
【実施例】［実施例１］図１に示す脱燐処理設備を用
い、脱燐処理後にク溶性カリ化合物組成の溶融スラグを
製造した実施例を説明する。高炉から出銑された溶銑を
脱硫処理し、脱硫処理後、溶銑保持容器内に添加した脱
硫剤を排滓処理してから、図１に示す脱燐処理設備に溶
銑を搬送した。溶銑質量は１５０トン、溶銑組成は、炭
素：４．７mass％、珪素：０．２０mass％、燐：０．１
０mass％、硫黄：０．０１mass％、溶銑温度は１３３０
℃であった。溶銑保持容器内には、前工程の脱硫スラグ
が若干残留していたが、残留量は少なく、ク溶性カリ化
合物組成の溶融スラグの製造においてその影響は少ない
ので、残留スラグの量及び組成は把握しなかった。[Examples] [Example 1] An example in which a molten slag having a composition of a fusible potassium compound after the dephosphorization treatment was manufactured using the dephosphorization treatment equipment shown in Fig. 1 will be described. The hot metal tapped from the blast furnace was desulfurized, and after the desulfurization process, the desulfurizing agent added to the hot metal holding container was discharged, and then the hot metal was conveyed to the dephosphorization treatment facility shown in FIG. The hot metal mass is 150 tons, the hot metal composition is carbon: 4.7 mass%, silicon: 0.20 mass%, phosphorus: 0.1
0 mass%, sulfur: 0.01 mass%, hot metal temperature is 1330
It was ℃. Although some desulfurized slag from the previous process remained in the hot metal holding container, the residual amount was small, and its influence was small in the production of molten slag having the composition of the fusible potassium compound, so the amount and composition of the residual slag were determined. I didn't.
【００５４】先ず、脱燐処理を行なった。脱燐処理は、
脱燐用フラックスである生石灰と脱燐用酸素源の鉄鉱石
とを上置き添加し、インジェクションランスから窒素ガ
スを吹き込みながら、気体酸素源として酸素ガスを上吹
き酸素ランスから吹きつけて実施した。この場合、脱燐
スラグの塩基度が２．０になるように、溶銑中珪素濃度
に基づき生石灰の添加量を決定した。この条件で約３０
分間脱燐処理を実施した。First, dephosphorization treatment was performed. Dephosphorization treatment is
Quick lime, which is a flux for dephosphorization, and iron ore, which is an oxygen source for dephosphorization, were added above, and nitrogen gas was blown from the injection lance while oxygen gas was blown from the top-blown oxygen lance as a gaseous oxygen source. In this case, the amount of quicklime added was determined based on the silicon concentration in the hot metal so that the basicity of the dephosphorized slag was 2.0. About 30 under these conditions
A dephosphorization treatment was carried out for a minute.
【００５５】脱燐処理後、脱燐スラグから分析試料を採
取して脱燐スラグの化学成分組成を分析した。その結
果、脱燐スラグはＣａＯ：４９mass％、ＳｉＯ2 ：２４
mass％、ＦｅＯ：８mass％、Ｐ2 Ｏ5 ：３mass％である
ことが分かった。この組成は、添加した生石灰量と脱燐
処理前の溶銑中珪素濃度とから推定した組成とほぼ一致
した。又、スラグ厚みの測定値から算出した脱燐スラグ
質量は２７００ｋｇであった。この値も、添加した生石
灰量と脱燐処理前の溶銑中珪素濃度とから推定した質量
とほぼ一致した。After the dephosphorization treatment, an analysis sample was taken from the dephosphorization slag to analyze the chemical composition of the dephosphorization slag. As a result, the dephosphorization slag CaO: 49mass%, SiO 2: 24
It was found to be mass%, FeO: 8 mass%, P 2 O 5 : 3 mass%. This composition was almost the same as the composition estimated from the amount of quicklime added and the silicon concentration in the hot metal before dephosphorization treatment. The mass of dephosphorized slag calculated from the measured value of the slag thickness was 2700 kg. This value also almost coincided with the mass estimated from the amount of added quick lime and the silicon concentration in the hot metal before the dephosphorization treatment.
【００５６】緩効性カリ肥料は、ク溶性カリを２０mass
％以上含有し且つ可溶性珪酸を２５mass％以上含有する
必要があるので、脱燐スラグの組成及び質量に基づき、
ＳｉＯ2 濃度の目標値を２６mass％とするために成分調
整剤として珪砂を３５９ｋｇ添加することとした。又、
カリ原料として炭酸カリを用い、Ｋ2 Ｏ濃度の目標を２
１mass％、歩留りを９０％として、炭酸カリの添加量を
算出して１３２６ｋｇと決定した。The slow-acting potash fertilizer contains 20 mass% of soluble potassium potash.
%, And soluble silicic acid must be contained in an amount of 25 mass% or more. Therefore, based on the composition and mass of dephosphorization slag,
In order to set the target value of the SiO 2 concentration to 26 mass%, 359 kg of silica sand was added as a component adjusting agent. or,
Use potassium carbonate as the potassium raw material and set the K 2 O concentration target to 2
The amount of potassium carbonate added was calculated to be 1326 kg with 1 mass% and the yield of 90%.
【００５７】次いで、緩効性カリ肥料の製造を行なっ
た。先ず、炭酸カリの添加前にインジェクションランス
を介して窒素ガスを溶銑中に吹き込み、脱燐スラグを溶
融した。次いで、窒素ガス吹き込みを停止して、約３０
ｍｍ直径のブリケットに予め成形した炭酸カリを、２０
０〜２４０ｋｇ／ｍｉｎの添加速度で上置き添加し、６
分間の連続添加で１３２６ｋｇを添加終了した。炭酸カ
リ添加終了後、インジェクションランスから窒素ガスを
２分間溶銑中に吹き込み、脱燐スラグと炭酸カリとの融
合を促進させた。Then, a slow-release potash fertilizer was produced. First, before the addition of potassium carbonate, nitrogen gas was blown into the hot metal through an injection lance to melt the dephosphorized slag. Then, the nitrogen gas blowing is stopped, and about 30
20mm of pre-formed potassium carbonate into briquettes of mm diameter
Overlay at an addition rate of 0 to 240 kg / min, and
The addition of 1326 kg was completed by continuous addition for 1 minute. After the addition of potassium carbonate was completed, nitrogen gas was blown into the hot metal for 2 minutes from the injection lance to promote the fusion of the dephosphorization slag and the potassium carbonate.
【００５８】その後、生成した溶融スラグを、溶銑保持
容器から鋳鋼製の取鍋（以下、「ノロパン」と記す）内
に、滓掻機を用いて掻き出す際に、成分調整剤である粉
体状の珪砂３５９ｋｇを添加し、溶融スラグに混合させ
た。次いで、建屋内に設けられた、厚み１５〜２０ｍｍ
の厚鋼板で底面及び側面が構成された鉄箱内にノロパン
内の溶融スラグを流し込み、冷却・固化させて３８８０
ｋｇの塊状スラグを得た。この塊状スラグを２ｍｍ以下
に破砕して緩効性カリ肥料とした。Thereafter, when the generated molten slag is scraped out of the hot metal holding container into a cast steel ladle (hereinafter referred to as "NOROPAN") using a slag scraper, it is in the form of powder as a component adjusting agent. 359 kg of silica sand was added and mixed with the molten slag. Next, the thickness of 15 to 20 mm provided in the building
The molten slag in Noropan is poured into an iron box whose bottom and side are made of thick steel plate, and is cooled and solidified to 3880.
Obtained kg massive slag. This massive slag was crushed to 2 mm or less to obtain a slow-release potash fertilizer.
【００５９】この緩効性カリ肥料の成分を表１に示し、
又、ク溶性カリと水溶性カリの分析値及び炭酸カリの歩
留りを表２に示す。表２において、Ｔ．Ｋ2 Ｏは全カ
リ、Ｃ−Ｋ2 Ｏはク溶性カリ、Ｗ−Ｋ2 Ｏは水溶性カリ
を示す。尚、ク溶性カリは２mass％クエン酸に溶解した
Ｋ2 Ｏ分であり、ク溶性カリは水溶性カリを含んでい
る。これらの表に示すように、生成した緩効性カリ肥料
中のＫ2 Ｏ分は、２１mass％で、その内９５％がク溶性
であった。又、炭酸カリの歩留りは９０％であった。
尚、表２にはＴ．ＳｉＯ2 及びＳ−ＳｉＯ2 を同時に示
す。Ｔ．ＳｉＯ2 は全珪酸、Ｓ−ＳｉＯ2 は可溶性珪酸
を示す。The components of this slow-release potash fertilizer are shown in Table 1,
Table 2 shows the analytical values of potassium-soluble potassium and water-soluble potassium and the yield of potassium carbonate. In Table 2, T. K 2 O is the total potassium, C-K 2 O is click-soluble potassium, W-K 2 O is shown a water-soluble potassium. The Ku-soluble potassium is K 2 O content dissolved in 2 mass% citric acid, and the Ku-soluble potassium contains water-soluble potassium. As shown in these tables, the K 2 O content in the produced slow-release potassium fertilizer was 21% by mass, of which 95% was K-soluble. The yield of potassium carbonate was 90%.
In Table 2, T. SiO 2 and S-SiO 2 are shown simultaneously. T. SiO 2 represents all silicic acid, and S-SiO 2 represents soluble silicic acid.
【００６０】[0060]
【表１】 [Table 1]
【００６１】[0061]
【表２】 [Table 2]
【００６２】［実施例２］実施例１と同様に、図１に示
す脱燐処理設備にて本発明を実施した。本実施例では脱
燐処理と同時にク溶性カリ化合物組成の溶融スラグを製
造した。高炉から出銑された溶銑を脱硫処理し、脱硫処
理後、溶銑保持容器内に添加した脱硫剤を排滓処理して
から、図１に示す脱燐処理設備に溶銑を搬送した。溶銑
質量は１５０トン、溶銑組成は、炭素：４．５mass％、
珪素：０．２３mass％、燐：０．１１mass％、硫黄：
０．００８mass％、溶銑温度は１３３５℃であった。溶
銑保持容器内には、前工程の脱硫スラグが若干残留して
いたが、残留量は少なく、ク溶性カリ化合物組成の溶融
スラグの製造においてその影響は少ないので、残留スラ
グの量及び組成は把握しなかった。Example 2 The present invention was carried out in the dephosphorization treatment facility shown in FIG. 1 as in Example 1. In this example, molten slag having a composition of a soluble potassium compound was produced simultaneously with the dephosphorization treatment. The hot metal tapped from the blast furnace was desulfurized, and after the desulfurization process, the desulfurizing agent added to the hot metal holding container was discharged, and then the hot metal was conveyed to the dephosphorization treatment facility shown in FIG. The mass of hot metal is 150 tons, the hot metal composition is carbon: 4.5 mass%,
Silicon: 0.23 mass%, phosphorus: 0.11 mass%, sulfur:
The hot metal temperature was 0.008 mass% and 1335 ° C. Although some desulfurized slag from the previous process remained in the hot metal holding container, the residual amount was small, and its influence was small in the production of molten slag having the composition of the fusible potassium compound, so the amount and composition of the residual slag were determined. I didn't.
【００６３】緩効性カリ肥料は、ク溶性カリを２０mass
％以上含有し且つ可溶性珪酸を２５mass％以上含有する
必要があり、更に、脱燐スラグの場合にはＦｅＯやＭｎ
Ｏ等の酸化物が１０〜１７mass％含有されるので、本実
施例の場合、これらを考慮して、脱燐スラグの塩基度を
１．５、即ちＣａＯ濃度の目標を４０mass％程度とし
た。そこで、脱燐処理によるＳｉＯ2 の生成量を脱燐処
理前の溶銑中珪素濃度から７３９ｋｇと推定し、このＳ
ｉＯ2 の生成量に基づき、脱燐スラグの塩基度が１．５
となるように脱燐用フラックスである生石灰の添加量を
算出した。The slow-release potash fertilizer contains 20 mass% of soluble potassium potash.
%, And soluble silicic acid must be contained in an amount of 25 mass% or more. Further, in the case of dephosphorization slag, FeO or Mn
Since oxides such as O are contained in an amount of 10 to 17 mass%, in the case of the present embodiment, the basicity of the dephosphorization slag is set to 1.5, that is, the target of CaO concentration is set to about 40 mass% in consideration of these. Therefore, the amount of SiO 2 produced by the dephosphorization treatment was estimated to be 739 kg from the silicon concentration in the hot metal before the dephosphorization treatment.
Based on the amount of iO 2 produced, the basicity of the dephosphorization slag is 1.5.
The addition amount of quicklime, which is the flux for dephosphorization, was calculated so that
【００６４】又、この方法により製造されるク溶性カリ
化合物組成の溶融スラグ中にはＦｅＯやＭｎＯ等のＳｉ
Ｏ2 及びＣａＯ以外の酸化物が合計１５mass％含有され
ると仮定して、換言すれば、この方法により製造される
緩効性カリ肥料中ではＳｉＯ 2 とＣａＯとＫ2 Ｏとを合
計した濃度は８５mass％になると仮定して、塩基度１．
５の条件を配慮してカリ原料である炭酸カリの添加量を
算出した。Ｋ2 Ｏ濃度の目標値を２１mass％とし、歩留
りを９０％とした場合の炭酸カリの添加量は９８８ｋｇ
と算出された。Also, the potassium soluble potassium produced by this method.
Si such as FeO or MnO is contained in the molten slag having a compound composition.
O2 And contains oxides other than CaO in total of 15 mass%
, In other words, manufactured by this method
SiO in slow-release potassium fertilizer 2 And CaO and K2 Combine with O
Assuming that the measured concentration is 85 mass%, the basicity is 1.
Considering the conditions of 5, the addition amount of potassium carbonate, which is the raw material of potassium,
It was calculated. K2 The target value of O concentration is 21 mass% and the yield
When the amount is 90%, the amount of potassium carbonate added is 988 kg.
Was calculated.
【００６５】そして算出した量の生石灰及び炭酸カリを
上置き添加すると共に、脱燐用酸素源の鉄鉱石を上置き
添加し、インジェクションランスから窒素ガスを吹き込
みながら、気体酸素源として酸素ガスを上吹き酸素ラン
スから吹きつけて脱燐処理を実施した。Then, the calculated amounts of quicklime and potassium carbonate were added on top, and iron ore as an oxygen source for dephosphorization was added on top. While blowing nitrogen gas from the injection lance, oxygen gas was added as a source of oxygen gas. Dephosphorization treatment was carried out by blowing from a blown oxygen lance.
【００６６】脱燐処理後、生成した溶融スラグを溶銑保
持容器からノロパン内に、滓掻機を用いて一旦掻き出
し、次いで、風砕法により冷却・固化させ、２９０５ｋ
ｇの約５ｍｍ直径の粒状スラグを得て緩効性カリ肥料と
した。この緩効性カリ肥料の成分、ク溶性カリと水溶性
カリの分析値、及び炭酸カリの歩留りを前述した表１及
び表２に示す。これらの表に示すように、緩効性カリ肥
料中のＫ2 Ｏ分は、２１mass％で、その内９５％がク溶
性であり、又、炭酸カリの歩留りは９１％であった。After the dephosphorization treatment, the generated molten slag was scraped out of the hot metal holding container into the Noropan once by using a slag scraper, and then cooled and solidified by the air crushing method to obtain 2905 k.
Grained slag having a diameter of about 5 mm was obtained and used as a slow-release potash fertilizer. The components of this slow-release potash fertilizer, the analysis values of black-soluble potash and water-soluble potash, and the yield of potash carbonate are shown in Tables 1 and 2 described above. As shown in these tables, the K 2 O content in the slow-release potassium fertilizer was 21% by mass, of which 95% was soluble in Cu, and the yield of potassium carbonate was 91%.
【００６７】[0067]
【発明の効果】本発明では、鉄鋼製品の精錬過程で大量
に発生する脱燐スラグにカリ原料を添加して緩効性カリ
肥料を製造するので、脱燐スラグを加熱するための熱量
が不要であると共にカリ原料の溶融、分解、融合に要す
る熱量を溶銑が供給し、極めて熱経済性が高く、更に、
脱燐スラグの加熱時間が不要のために短時間で製造可能
になり、その結果、製造コストを大幅に低減できる。そ
して、本発明による緩効性カリ肥料は肥料成分として重
要である燐をも含有すると共に、利材化が困難であった
脱燐スラグを有効活用することができ、更に、新たな製
造設備を設けることなく既存の製鉄設備で緩効性カリ肥
料を製造できるので、その工業的効果は多大である。INDUSTRIAL APPLICABILITY According to the present invention, since the potassium raw material is added to the dephosphorization slag, which is generated in a large amount in the refining process of steel products, to produce the slow-release potash fertilizer, the heat amount for heating the dephosphorization slag is not required. At the same time, the amount of heat required for melting, decomposing, and fusing the potassium raw material is supplied by the hot metal, and the thermal economy is extremely high.
Since the dephosphorization slag is not required to be heated, it can be manufactured in a short time, and as a result, the manufacturing cost can be significantly reduced. The slow-release potash fertilizer according to the present invention also contains phosphorus, which is important as a fertilizer component, and can effectively utilize dephosphorization slag, which was difficult to use as a material. Since the slow-release potash fertilizer can be produced without using existing steelmaking equipment, its industrial effect is great.
【図１】本発明を実施する際に用いた溶銑の脱燐処理設
備の例を示す概略図である。FIG. 1 is a schematic diagram showing an example of hot metal dephosphorization treatment equipment used in carrying out the present invention.
１ 溶銑保持容器 ２ 溶銑 ３ 台車 ４ 脱燐スラグ ５ カリ原料 ６ 上吹き酸素ランス ７ インジェクションランス ８ 成分調整剤 ９ 脱燐用フラックス ２０ 固体酸素源 1 Hot metal holding container 2 hot metal 3 dolly 4 Dephosphorization slag 5 Potassium raw material 6 Top-blown oxygen lance 7 injection lance 8 component regulator 9 Dephosphorization flux 20 Solid oxygen source
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０５Ｄ 3:04） (72)発明者 井上 茂 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 4G036 AC03 4H061 AA02 BB55 CC08 CC11 GG23 GG43 HH03 HH04 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI theme code (reference) C05D 3:04) (72) Inventor Shigeru Inoue 1-2-1, Marunouchi, Chiyoda-ku, Tokyo In-house F-term (reference) 4G036 AC03 4H061 AA02 BB55 CC08 CC11 GG23 GG43 HH03 HH04
Claims (7)
理の際に生成した脱燐スラグとを収納した溶銑保持容器
内にカリ原料を添加する工程と、溶銑中に攪拌用ガスを
吹き込んで攪拌し、脱燐スラグとカリ原料とを融合させ
る工程と、融合して生成したスラグを冷却して固化させ
る工程と、からなることを特徴とする緩効性カリ肥料の
製造方法。1. A step of adding a potassium raw material into a hot metal holding vessel containing dephosphorized hot metal and dephosphorized slag produced during the dephosphorization treatment of the hot metal, and a stirring gas in the hot metal. A method for producing a slow-release potash fertilizer, which comprises a step of blowing and stirring to fuse the dephosphorization slag and a potassium raw material, and a step of cooling and solidifying the slag produced by the fusion.
理の際に生成した脱燐スラグとを収納した溶銑保持容器
内にカリ原料と成分調整剤とを添加する工程と、溶銑中
に攪拌用ガスを吹き込んで攪拌し、脱燐スラグとカリ原
料と成分調整剤とを融合させる工程と、融合して生成し
たスラグを冷却して固化させる工程と、からなることを
特徴とする緩効性カリ肥料の製造方法。2. A step of adding a potassium raw material and a component modifier into a hot metal holding container containing dephosphorized hot metal and dephosphorized slag produced during the dephosphorization treatment of the hot metal, and The process is performed by blowing a stirring gas into the mixture and stirring the mixture to fuse the dephosphorization slag, the potassium raw material and the component adjusting agent, and cooling the slag produced by the fusion to solidify it. Method for producing potency fertilizer.
溶銑の脱燐処理中にカリ原料を添加し、脱燐処理により
生成する脱燐スラグとカリ原料とを前記攪拌用ガスにて
攪拌して融合させる工程と、融合して生成したスラグを
冷却して固化させる工程と、からなることを特徴とする
緩効性カリ肥料の製造方法。3. A potash raw material is added during the dephosphorization treatment of the hot metal using a stirring gas in a hot metal holding container, and the dephosphorization slag and the potassium raw material produced by the dephosphorization treatment are treated with the stirring gas. A method for producing a slow-release potash fertilizer, which comprises a step of stirring and fusing, and a step of cooling and solidifying the slag produced by fusing.
溶銑の脱燐処理中にカリ原料と成分調整剤とを添加し、
脱燐処理により生成する脱燐スラグとカリ原料と成分調
整剤とを前記攪拌用ガスにて攪拌して融合させる工程
と、融合して生成したスラグを冷却して固化させる工程
と、からなることを特徴とする緩効性カリ肥料の製造方
法。4. A potash raw material and a component modifier are added during the dephosphorization treatment of hot metal using a stirring gas in a hot metal holding container,
And a step of agitating the dephosphorization slag generated by the dephosphorization treatment, the potassium raw material, and the component adjusting agent to fuse them together, and a step of cooling and solidifying the slag produced by the fusion. A method for producing a slow-release potash fertilizer, which comprises:
合させる工程とは別工程として、成分調整剤を添加する
工程を有することを特徴とする請求項１又は請求項３に
記載の緩効性カリ肥料の製造方法。5. The loosening according to claim 1, further comprising a step of adding a component adjusting agent as a step different from the step of fusing the dephosphorization slag and the potassium raw material. Method for producing potency fertilizer.
る物質であることを特徴とする請求項２、請求項４、請
求項５の何れか１つに記載の緩効性カリ肥料の製造方
法。6. The production of a slow-release potash fertilizer according to claim 2, wherein the component modifier is a substance containing SiO 2 as a main component. Method.
することを特徴とする請求項１ないし請求項６の何れか
１つに記載の緩効性カリ肥料の製造方法。7. The method for producing a slow-release potash fertilizer according to any one of claims 1 to 6, wherein the slow-release potash fertilizer contains a phosphorus compound.
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|---|---|---|---|
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001234801A JP2003048793A (en) | 2001-08-02 | 2001-08-02 | Method of manufacturing slow-acting potash fertilizer |
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|---|---|
| JP2003048793A true JP2003048793A (en) | 2003-02-21 |
Family
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007013217A1 (en) * | 2005-07-29 | 2007-02-01 | Aichi Steel Corporation | Iron(i) oxide-containing composition and plant growth promoter comprising the same |
| CN105777330A (en) * | 2016-02-22 | 2016-07-20 | 新疆中合大正商贸有限公司 | Technology for producing silicon fertilizer by means of blowing desulfurization slag |
| CN109821462A (en) * | 2019-04-01 | 2019-05-31 | 嘉施利(应城)水溶肥有限公司 | A kind of Water soluble fertilizer modularization machining production line |
| JP2019172547A (en) * | 2018-03-29 | 2019-10-10 | Ｊｆｅスチール株式会社 | Manufacturing method of phosphoric acid fertilizer, and phosphoric acid fertilizer |
| JP2021067082A (en) * | 2019-10-23 | 2021-04-30 | 日鉄エンジニアリング株式会社 | Vegetation base material |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238366A (en) * | 1975-09-19 | 1977-03-24 | Nisshin Steel Co Ltd | Process for producing mineral resudue containing phosphate and magnesium as soil amendment fertilizer material |
| JPS5635713A (en) * | 1979-08-30 | 1981-04-08 | Sumitomo Metal Ind Ltd | Refining method of steel |
| JPS56127717A (en) * | 1980-03-11 | 1981-10-06 | Nippon Steel Corp | Steel making process discharging slag suited as phosphatic fertilizer |
| JPS6117483A (en) * | 1984-07-02 | 1986-01-25 | 中川 健一 | Manufacture of potassium silicate fertilizer |
| JPS62290815A (en) * | 1986-06-07 | 1987-12-17 | Sumitomo Metal Ind Ltd | Steel making method |
| JPH08319506A (en) * | 1995-05-23 | 1996-12-03 | Sumitomo Metal Ind Ltd | Method for dephosphorizing molten iron |
| JPH09278568A (en) * | 1996-02-09 | 1997-10-28 | Nkk Corp | Production of citric-soluble potassium fertilizer |
| JPH1171611A (en) * | 1997-06-30 | 1999-03-16 | Osaka Koukai Kk | Lime flux for smelting metal |
| JPH11106274A (en) * | 1997-08-07 | 1999-04-20 | Nkk Corp | Production of potassic fertilizer soluble in citric acid without dissolving in water |
| JPH11130569A (en) * | 1997-08-11 | 1999-05-18 | Nkk Corp | Slow-acting potassium fertilizer |
| JP2000226284A (en) * | 1999-02-05 | 2000-08-15 | Nkk Corp | Production of citric soluble potash fertilizer |
-
2001
- 2001-08-02 JP JP2001234801A patent/JP2003048793A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238366A (en) * | 1975-09-19 | 1977-03-24 | Nisshin Steel Co Ltd | Process for producing mineral resudue containing phosphate and magnesium as soil amendment fertilizer material |
| JPS5635713A (en) * | 1979-08-30 | 1981-04-08 | Sumitomo Metal Ind Ltd | Refining method of steel |
| JPS56127717A (en) * | 1980-03-11 | 1981-10-06 | Nippon Steel Corp | Steel making process discharging slag suited as phosphatic fertilizer |
| JPS6117483A (en) * | 1984-07-02 | 1986-01-25 | 中川 健一 | Manufacture of potassium silicate fertilizer |
| JPS62290815A (en) * | 1986-06-07 | 1987-12-17 | Sumitomo Metal Ind Ltd | Steel making method |
| JPH08319506A (en) * | 1995-05-23 | 1996-12-03 | Sumitomo Metal Ind Ltd | Method for dephosphorizing molten iron |
| JPH09278568A (en) * | 1996-02-09 | 1997-10-28 | Nkk Corp | Production of citric-soluble potassium fertilizer |
| JPH1171611A (en) * | 1997-06-30 | 1999-03-16 | Osaka Koukai Kk | Lime flux for smelting metal |
| JPH11106274A (en) * | 1997-08-07 | 1999-04-20 | Nkk Corp | Production of potassic fertilizer soluble in citric acid without dissolving in water |
| JPH11130569A (en) * | 1997-08-11 | 1999-05-18 | Nkk Corp | Slow-acting potassium fertilizer |
| JP2000226284A (en) * | 1999-02-05 | 2000-08-15 | Nkk Corp | Production of citric soluble potash fertilizer |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007013217A1 (en) * | 2005-07-29 | 2007-02-01 | Aichi Steel Corporation | Iron(i) oxide-containing composition and plant growth promoter comprising the same |
| JPWO2007013217A1 (en) * | 2005-07-29 | 2009-02-05 | 愛知製鋼株式会社 | Composition containing ferrous oxide for promoting plant growth |
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| CN105777330B (en) * | 2016-02-22 | 2021-02-23 | 新疆中合大正冶金科技有限公司 | Process for producing silicon fertilizer by using blowing desulfurization slag |
| JP2019172547A (en) * | 2018-03-29 | 2019-10-10 | Ｊｆｅスチール株式会社 | Manufacturing method of phosphoric acid fertilizer, and phosphoric acid fertilizer |
| CN109821462A (en) * | 2019-04-01 | 2019-05-31 | 嘉施利(应城)水溶肥有限公司 | A kind of Water soluble fertilizer modularization machining production line |
| CN109821462B (en) * | 2019-04-01 | 2021-12-10 | 嘉施利(应城)水溶肥有限公司 | Water-soluble fertile modularization processing lines |
| JP2021067082A (en) * | 2019-10-23 | 2021-04-30 | 日鉄エンジニアリング株式会社 | Vegetation base material |
| JP7282330B2 (en) | 2019-10-23 | 2023-05-29 | 日鉄エンジニアリング株式会社 | Vegetation base material |
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