JPS63218527A - Manufacture of foamed slag - Google Patents
Manufacture of foamed slagInfo
- Publication number
- JPS63218527A JPS63218527A JP62052378A JP5237887A JPS63218527A JP S63218527 A JPS63218527 A JP S63218527A JP 62052378 A JP62052378 A JP 62052378A JP 5237887 A JP5237887 A JP 5237887A JP S63218527 A JPS63218527 A JP S63218527A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- molten slag
- foamed
- foamed slag
- blowing agent
- 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
- 239000002893 slag Substances 0.000 title claims description 67
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims description 16
- 239000004088 foaming agent Substances 0.000 claims description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 239000003575 carbonaceous material Substances 0.000 claims description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- 238000000034 method Methods 0.000 description 20
- 239000004604 Blowing Agent Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- -1 filters Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、園芸用培土、珪酸系及び石灰系肥料等の植
物栽培材料や、軽量の建築材料、並びに、その他各種材
料に使用される発泡スラグの製造方法に関する。Detailed Description of the Invention (Field of Industrial Application) This invention is a foamed material used for plant cultivation materials such as horticultural soil, silicic acid-based and lime-based fertilizers, lightweight building materials, and various other materials. This invention relates to a method for producing slag.
（従来の技術）
鉄鋼業では、高炉、転炉、電気炉等から溶融スラグが排
出されるため、この溶融スラグを利用して軽量、多孔質
の発泡スラグを製造することが行われており、これには
従来、種々の方法が提案されている。(Prior art) In the steel industry, molten slag is discharged from blast furnaces, converters, electric furnaces, etc., and this molten slag is used to manufacture lightweight, porous foamed slag. Conventionally, various methods have been proposed for this purpose.
即ち、植物栽培材料用には、第１従来例として、例えば
特公昭５２−３９７３６号公報で示すものがある。これ
によれば、高炉から排出される溶融スラグを水砕して気
孔を形成し、これによって得た水砕スラグを所望の粒度
に粉砕して発泡スラグを製造している。That is, as a first conventional example for use as a plant cultivation material, there is, for example, the one shown in Japanese Patent Publication No. 52-39736. According to this method, molten slag discharged from a blast furnace is pulverized to form pores, and the resulting granulated slag is pulverized to a desired particle size to produce foamed slag.
一方、建築材料用には、第２従来例として、例えば特公
昭５７−７０９２号公報で示すものがある。これによれ
ば、高炉から排出される溶融スラグ中に脱ガス剤として
酸化鉄と酸化亜鉛を添加して水素や窒素のガスを放出さ
せ、これを水砕して、一旦、気泡の発生していない水砕
スラグを得る０次に、この水砕スラグに微粉砕した発泡
剤等を添加し、これを焼成することによりスラグに気孔
を形成して発泡スラグを製造している。On the other hand, as a second conventional example for use in building materials, there is, for example, the one shown in Japanese Patent Publication No. 57-7092. According to this, iron oxide and zinc oxide are added as degassing agents to the molten slag discharged from the blast furnace to release hydrogen and nitrogen gases, which are then pulverized and once bubbles are generated. Next, a finely pulverized foaming agent, etc. is added to the granulated slag, and this is fired to form pores in the slag to produce a foamed slag.
更に、上記植物栽培、建築の両材料用には、第３従来例
として、例えば特公昭５７−２８３８１号公報に示すも
のがあり、これでは上記溶融スラグ中にガス状の窒素富
化化合物を添加して気泡を発生させ、これを水砕して気
孔が形成された水砕スラグを発泡スラグとしている。Furthermore, as a third conventional example for both the above-mentioned plant cultivation and construction materials, there is a method shown in Japanese Patent Publication No. 57-28381, in which a gaseous nitrogen-enriched compound is added to the above-mentioned molten slag. The foamed slag is made from granulated slag with pores formed by pulverizing the foam to generate air bubbles.
（発明が解決しようとする問題点）
ところで、上記第１従来例では、発泡スラグの性状は溶
融スラグを単に水砕した水砕スラグと同一であるため、
植物栽培用培土としてその通気性や保水性は低いという
不都合がある。(Problems to be Solved by the Invention) In the first conventional example, the properties of the foamed slag are the same as those of granulated slag obtained by simply pulverizing molten slag.
It has the disadvantage of having low air permeability and low water retention when used as a potting soil for plant cultivation.
一方、第２従来例では、高温のスラグを一旦水で急冷し
て粒状の水砕スラグを形成し１次にこれに発泡剤を添加
して、再び高温となるように加熱し焼成している。この
ため、発泡スラグの製造工程が複雑で、かつ、その製造
コストが高価になるという不都合がある。On the other hand, in the second conventional example, high-temperature slag is once quenched with water to form granular granulated slag, first a foaming agent is added to this, and the mixture is heated again to a high temperature and fired. . Therefore, there are disadvantages in that the manufacturing process of the foamed slag is complicated and the manufacturing cost is high.
また、第３従来例では、気泡を発生させるのに窒素富化
化合物を使用するため、これによる発泡スラグの製造コ
ストが高価になるという不都合がある。Further, in the third conventional example, since a nitrogen-enriched compound is used to generate bubbles, there is a disadvantage that the manufacturing cost of the foamed slag is high.
（発明の目的）
この発明は、上記のような事情に注目してなされたもの
で、上記種々の問題点を解決して発泡スラグの付加価値
を向上させることを目的とする。(Objective of the Invention) The present invention has been made in view of the above-mentioned circumstances, and aims to improve the added value of foamed slag by solving the various problems mentioned above.
（発明の構成）
上記目的を達成するためのこの発明の特徴とするところ
は、高炉等から排出される溶融スラグ中に発泡剤として
酸化第２鉄材を添加して気泡を発生させ、これを急冷し
てこのスラグに気孔を形成することにある。(Structure of the Invention) The feature of this invention for achieving the above object is that a ferric oxide material is added as a foaming agent to the molten slag discharged from a blast furnace, etc. to generate bubbles, and then the bubbles are rapidly cooled. The purpose is to form pores in this slag.
（実施例） 以下、この発明の詳細な説明する。(Example) The present invention will be described in detail below.
（第１実施例）
先ず、高炉から排出された溶融スラグを処理用容器に注
ぐ、この場合、上記容器は、通常のスラグ鍋でも良いが
、溶融スラグよりも発泡スラグの方が体積は大きくなる
ため、上記通常のスラグ鍋より深い鍋を使用する方が好
ましい。(First Example) First, the molten slag discharged from the blast furnace is poured into a processing container. In this case, the container may be a normal slag pot, but the volume of foamed slag is larger than that of molten slag. Therefore, it is preferable to use a deeper pot than the normal slag pot mentioned above.
次に、上記溶融スラグ中に発泡剤として鉄鉱石等の酸化
第２鉄材と、粉コークス等の炭材とを混合したものを添
加する。この発泡剤が溶融スラグ中に速やかに溶解して
反応するように、この発泡剤を粒度約５厘１以下の粉粒
状とする。また、酸化第２鉄材中の酸化第２鉄と、炭材
中の炭素との重量割合を炭素が５〜１５％となるように
する。このとき、上記発泡剤は溶融スラグ中で、次式に
示す反応を起こす。Next, a mixture of a ferric oxide material such as iron ore and a carbon material such as coke powder is added as a foaming agent to the molten slag. The blowing agent is in the form of powder particles with a particle size of about 5 cm or less so that the blowing agent quickly dissolves and reacts in the molten slag. Further, the weight ratio of ferric oxide in the ferric oxide material to carbon in the carbon material is set to 5 to 15%. At this time, the above-mentioned foaming agent causes a reaction shown in the following formula in the molten slag.
２ Ｆ ｅ ２０３ ＋ ３ Ｃ→４ Ｆ ｅ ＋ ３
ＣＯ２↑このとき発生するＣ０２ガスによりスラグ中
に気泡が発生する。2 Fe 203 + 3 C→4 Fe + 3
CO2↑The CO2 gas generated at this time generates bubbles in the slag.
そして、上記気泡が発生した溶融スラグを急冷して凝固
させる。すると、凝固したスラグ中に気孔が形成され、
これによって発泡スラグが得られる。上記急冷の方法と
しては、上記溶融スラグを水砕して凝固させる方法があ
る。また、この水砕方法以外には、溶融スラグを他の容
器に連続的に注入しながら大量の水を散水して凝固させ
る方法や、ダブルロールにより連続的に凝固させる方法
等がある。この場合、上記急冷の方法は、発泡スラグの
用途により決めれば良い。Then, the bubble-generated molten slag is rapidly cooled and solidified. Then, pores are formed in the solidified slag,
This results in a foamed slag. As a method for the rapid cooling, there is a method in which the molten slag is pulverized and solidified. In addition to this granulation method, there are methods such as a method in which the molten slag is continuously poured into another container and solidified by sprinkling a large amount of water, and a method in which the molten slag is continuously solidified using double rolls. In this case, the method of rapid cooling may be determined depending on the use of the foamed slag.
即ち、発泡スラグを植物栽培材料等に使用する場合、こ
の材料には粒状、保水性、軽量化が要求されるため、急
冷の方法としては水砕方法が適している。That is, when foamed slag is used as a plant cultivation material, etc., the material is required to be granular, water-retentive, and lightweight, so the water pulverization method is suitable as a rapid cooling method.
一方、発泡スラグを建築材料等に使用する場合には、あ
る程度の強度や気孔の均一性が要求されるため、上記水
砕以外の方法が適している。On the other hand, when foamed slag is used as a building material, etc., a certain degree of strength and pore uniformity are required, so methods other than the above-mentioned water pulverization are suitable.
（第２実施例）
また、第２実施例として、発泡剤の成分を酸化第２鉄材
と、各種有機物等の炭材と、石灰石等の炭酸塩とした。(Second Example) In a second example, the components of the blowing agent were a ferric oxide material, a carbon material such as various organic substances, and a carbonate such as limestone.
この場合、約１３００℃以上という高温の溶融スラグ中
で酸化第２鉄、炭酸塩は熱分解を起こし、一方、有機物
は熱分解や燃焼して次式に示す反応を起こす。In this case, ferric oxide and carbonate are thermally decomposed in the molten slag at a high temperature of about 1300° C. or higher, while organic substances are thermally decomposed and burned to cause the reaction shown in the following equation.
３ Ｆ ６２０３４２ Ｆ ｅ３０４ ＋７０２
＋炭酸塩＋ Ｃａ Ｏ等＋ＣＯ２↑
有機物−＋ｃｏ、ｔ ＋Ｈ２ｏｆ
上記発泡剤は少量で大量のガスを発生するため、溶融ス
ラグ中への発泡剤の添加量は極わずかでよい、よって、
発泡剤の添加により、上記スラグの化学成分に変化を与
えることは抑制される。3 F 620342 F e304 +702
+ Carbonate + Ca O, etc. + CO2 ↑ Organic matter - + co, t + H2of Since the above blowing agent generates a large amount of gas in a small amount, the amount of blowing agent added to the molten slag can be extremely small.
Addition of a foaming agent suppresses changes in the chemical composition of the slag.
（他の実施例）
発泡剤の酸化第２鉄材は赤鉄鉱や褐鉄鉱等の鉄鉱石、も
しくは各種廃鉄材としてもよく、一方、炭材は粉コーク
スの他に各種廃炭材としてもよい、この場合には、発泡
剤のコストを低く抑えることができる。(Other Examples) The ferric oxide material of the blowing agent may be iron ore such as hematite or limonite, or various waste iron materials, while the carbon material may be various waste carbon materials in addition to coke powder. In some cases, the cost of blowing agents can be kept low.
また、発泡剤を粒度約１■履以下に微粉砕して粒径約１
＋ｓ層〜５ｍｍのミニペレットに造粒する。この場合に
は、発泡剤は溶融スラグ中に均一に溶解し、より反応性
が向上する。In addition, the blowing agent is finely pulverized to a particle size of about 1 cm or less.
+S layer ~ Granulate into mini pellets of 5 mm. In this case, the blowing agent is uniformly dissolved in the molten slag, and the reactivity is further improved.
更に、溶融スラグ中に発泡剤を添加する方法としては、
前記第１実施例以外の方法でも良い。Furthermore, as a method of adding a foaming agent to molten slag,
Methods other than the first embodiment may also be used.
即ち、あらかじめ容器中に発泡剤を装入し、これに溶融
スラグを注入する方法、いわゆる置き注ぎ法゛であって
もよい、この場合、容器に注入される溶融スラグの落下
エネルギーにより、このスラグ中で発泡剤が攪拌されて
溶解する。That is, a method may be used in which a blowing agent is charged into a container in advance and molten slag is poured into the container, the so-called pouring method.In this case, the falling energy of the molten slag poured into the container causes the slag to The blowing agent is stirred and dissolved therein.
また、容器に注入された溶融スラグの液面に発泡剤を添
加し、この発泡剤を機械的、もしくは、空気や水蒸気の
吹き込みにより攪拌してもよい。Alternatively, a blowing agent may be added to the liquid surface of the molten slag poured into the container, and the blowing agent may be stirred mechanically or by blowing air or steam.
更に、容器に注入された溶融スラグ中に、空気や水蒸気
等のガスと共に発泡剤の粉末をランスにより吹き込み、
これにより発泡剤を溶解させてもよい。Furthermore, blowing agent powder is blown into the molten slag poured into the container along with gases such as air and steam using a lance.
This may dissolve the blowing agent.
（発明の効果）
この発明によれば、高炉等から排出される溶融スラグ中
に発泡剤として醸化第２鉄材を添加して気泡を発生させ
、これを急冷してこのスラグに気孔を形成するため、こ
れにより製造された発泡スラグは多孔質、軽量、かつ、
通気性や保水性等が高いものである。よって、植物栽培
材料や、軽量の建築材料、並びに、断熱材、フィルター
、及び、触媒担体等の各種材料に最適であり、これらに
有効利用することができる。よって、従来方法により製
造された発泡スラグと比較して、本発明方法による発泡
スラグはその付加価値が大きく向上することになる。(Effects of the Invention) According to the present invention, a fermented ferric material is added as a foaming agent to molten slag discharged from a blast furnace, etc. to generate air bubbles, and the air bubbles are rapidly cooled to form pores in this slag. Therefore, the foamed slag produced by this method is porous, lightweight, and
It has high breathability, water retention, etc. Therefore, it is suitable for various materials such as plant cultivation materials, lightweight construction materials, heat insulating materials, filters, and catalyst carriers, and can be effectively used in these applications. Therefore, compared to the foamed slag produced by the conventional method, the added value of the foamed slag produced by the method of the present invention is greatly improved.
また、上記発泡スラグの製造は、単に溶融スラグ中に発
泡剤を添加して急冷するだけのため、第２従来例のよう
に急冷した後更に焼成する等の工程は不要である。よっ
て、本発明方法による発泡スラグの製造工程は簡単にな
り、かつ、その製造コストを低減させることができる。In addition, since the foamed slag is produced by simply adding a foaming agent to the molten slag and rapidly cooling it, there is no need for the steps of further firing after rapid cooling as in the second conventional example. Therefore, the process for producing foamed slag by the method of the present invention becomes simple, and the production cost can be reduced.
更に、溶融スラグ中に気泡を発生させるのに、第３従来
例のように窒素富化化合物を使用していないため、発泡
スラグの製造コストをより低減させることができる。Furthermore, unlike the third conventional example, a nitrogen-enriched compound is not used to generate bubbles in the molten slag, so the manufacturing cost of the foamed slag can be further reduced.
Claims (1)
酸化第２鉄材を添加して気泡を発生させ、これを急冷し
てこのスラグに気孔を形成することを特徴とする発泡ス
ラグの製造方法。 ２、発泡剤として更に、炭材もしくは炭酸塩の少なくと
もいずれか一方を添加することを特徴とする特許請求の
範囲第１項に記載の発泡スラグの製造方法。[Claims] 1. A ferric oxide material is added as a foaming agent to the molten slag discharged from a blast furnace, etc. to generate air bubbles, and the air bubbles are rapidly cooled to form pores in the slag. A method for producing foamed slag. 2. The method for producing foamed slag according to claim 1, further comprising adding at least one of a carbonaceous material and a carbonate as a foaming agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62052378A JPS63218527A (en) | 1987-03-07 | 1987-03-07 | Manufacture of foamed slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62052378A JPS63218527A (en) | 1987-03-07 | 1987-03-07 | Manufacture of foamed slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63218527A true JPS63218527A (en) | 1988-09-12 |
Family
ID=12913139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62052378A Pending JPS63218527A (en) | 1987-03-07 | 1987-03-07 | Manufacture of foamed slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63218527A (en) |
-
1987
- 1987-03-07 JP JP62052378A patent/JPS63218527A/en active Pending
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