JPS62182138A - Method and apparatus for drying water-granulated slag - Google Patents
Method and apparatus for drying water-granulated slagInfo
- Publication number
- JPS62182138A JPS62182138A JP61022105A JP2210586A JPS62182138A JP S62182138 A JPS62182138 A JP S62182138A JP 61022105 A JP61022105 A JP 61022105A JP 2210586 A JP2210586 A JP 2210586A JP S62182138 A JPS62182138 A JP S62182138A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- exhaust gas
- iron
- granulated slag
- drying
- 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.)
- Granted
Links
- 239000002893 slag Substances 0.000 title claims description 52
- 238000001035 drying Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 21
- 239000000428 dust Substances 0.000 claims description 70
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 98
- 229910052742 iron Inorganic materials 0.000 description 41
- 239000007789 gas Substances 0.000 description 40
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 10
- 239000012298 atmosphere Substances 0.000 description 6
- 238000009628 steelmaking Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 150000001875 compounds Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002918 waste heat 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Drying Of Solid Materials (AREA)
- 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〕
本発ＩＩＩＩＪ＋、ｔ、製鉄所等で発生するダストの有
効利用及び水砕スラグの乾燥方法及び装置に関ずろもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the effective use of dust generated in steel works, etc., and to a method and apparatus for drying granulated slag.
一般に製鉄プロセスで発生する高炉スラグは水を用いて
、冷却破砕されるため、通常２０〜４０％の水分を含有
している。これらスラグを水砕スラグという。Blast furnace slag, which is generally generated in the steel manufacturing process, is cooled and crushed using water, so it usually contains 20 to 40% water. These slags are called granulated slags.
これ等水砕スラグは、通常１５％程度の水分まで水切り
しそのままセメシｉ・メーカー等に出荷し、セメント原
料として用いられてきた。These granulated slags are usually drained to a moisture content of about 15% and shipped as they are to Cemesh I manufacturers, etc., and used as raw materials for cement.
近時、水砕スラグを混合した高炉セメントの品質の良さ
が明確になるにつれて、その需要も伸び、セメントメー
カーのみでの乾燥、破砕能力のみでは能力が不足してき
た。Recently, as the quality of blast furnace cement mixed with granulated slag has become clearer, demand for it has increased, and the drying and crushing capacity of cement manufacturers alone has become insufficient.
そのため、水砕スラグ発生元である高炉サイドでも乾燥
、破砕して出荷した方が、水砕スラグの製品価値を高め
ることが認識されるようになってきた。そこで一部メー
カーでは、製鉄プロセスで発生ずる副生ガスを利用して
、水砕スラグの乾燥を行なうようになってきている。Therefore, it has come to be recognized that the product value of granulated slag can be increased by drying and crushing it at the blast furnace side, where granulated slag is generated, before shipping. Therefore, some manufacturers have begun to dry granulated slag using by-product gas generated during the steelmaking process.
一方製鉄の各プロセスにおいて、鉄分を含むダストが大
景に発生する（以下含鉄ダストと称す）。On the other hand, in each process of steelmaking, dust containing iron is generated to a great extent (hereinafter referred to as iron-containing dust).
これらの含鉄ダストは、通常ｌＯ〜４０％の水分を含む
ため、製鉄原料として再利用するためには、水分を２〜
３％程度まで落とす必要がある。These iron-containing dusts usually contain 10 to 40% moisture, so in order to reuse them as raw materials for steelmaking, the moisture must be reduced to 2 to 40%.
It is necessary to reduce it to around 3%.
本発明は水分１０〜４０％を含有する前記含鉄ダストを
、製鉄所のプロセスにおいて発生ずる排ガスと含鉄ダス
ト自身で発生する酸化熱とを有機的に組み合わせて、水
砕スラグの乾燥及び含鉄ダストを再利用するために水分
２〜３％以下の条件まで一挙に乾燥できろ方法ならびに
装置を提供することを目的とするものである。The present invention organically combines the iron-containing dust containing 10 to 40% moisture with the exhaust gas generated in the process of a steel mill and the oxidation heat generated by the iron-containing dust itself, thereby drying the granulated slag and drying the iron-containing dust. The object of the present invention is to provide a method and apparatus that can dry the product all at once to a moisture content of 2 to 3% or less for reuse.
本発明者は、含鉄ダストの成分ＦｅＯ２０重量％以上な
らびにＴ−Ｆｅ ６０重量％以上を含有する場合におい
て、成る条件で酸素と反応することにより、それ自体が
発熱することに着目し本発明を完成したものである。The present inventor completed the present invention by focusing on the fact that when iron-containing dust contains 20% by weight or more of FeO and 60% by weight or more of T-Fe, the iron-containing dust itself generates heat when it reacts with oxygen under the following conditions. This is what I did.
即ち本発明は、水砕スラグ及び含鉄ダストを乾燥するに
当たり、Ｆｅ０２０重量％以上ならびにＴ−Ｆｅ６０重
景％以上含有する含鉄ダストを２００℃以上の排ガスを
用い、まず前記含鉄ダストと排ガスとを流動接触的に反
応せしめ含鉄ダストの内部酸化熱により、含鉄ダストの
水分を蒸発させると同時に排ガスの温度を上昇させる。That is, in drying granulated slag and iron-containing dust, the present invention first fluidizes the iron-containing dust containing 20% by weight or more of Fe0 and 60% or more of T-Fe using exhaust gas at 200° C. or higher. The heat of internal oxidation of the iron-containing dust caused by the catalytic reaction evaporates the moisture in the iron-containing dust and simultaneously increases the temperature of the exhaust gas.
続いてこの上昇した１、ＩＩＥガスと水砕スラグを流動
接触させ、排ガスの顕熱により水砕スラグの水分を乾燥
する方法であり、更にそのための装置としては、前記含
鉄ダスト及び水砕スラグの導入管ならびに排気煙道を上
部に、排ガス吹込管ならびに乾燥含鉄ダスト及び水砕ス
ラグ排出管を下部に備えてなる円筒状反応容器と前記反
応容器からの排ガス中のダスト集塵設備とから成り、該
反応容器内において、前記含鉄ダスト及び水砕スラグと
排ガスを順次流動接触せしめスラグを乾燥せしめること
を特徴とする水砕スラグ乾燥装置である。Subsequently, this elevated 1. IIE gas and granulated slag are brought into fluid contact with each other, and the moisture in the granulated slag is dried by the sensible heat of the exhaust gas. Consisting of a cylindrical reaction vessel comprising an inlet pipe and an exhaust flue at the top and an exhaust gas blowing pipe and a dry iron-containing dust and granulated slag discharge pipe at the bottom, and equipment for collecting dust in the exhaust gas from the reaction vessel, The granulated slag drying apparatus is characterized in that the iron-containing dust and the granulated slag are brought into fluid contact with the exhaust gas in order to dry the slag in the reaction vessel.
本発明者等は、次の第１表及び第２表に示す如％、製鉄
所において発生するダストのＦｅ、 ＦｅＯの酸化熱を
調査し本発明に至ったものである。The present inventors investigated the oxidation heat of Fe and FeO in dust generated in steel mills as shown in Tables 1 and 2 below, and arrived at the present invention.
含鉄ダストの酸化は次式に基づいて起こるものである。Oxidation of iron-containing dust occurs based on the following equation.
２Ｆｅ （ｓ） ＋恥０２（ｇ） →Ｆｅ２Ｏ３（ｓｌ
＋ １９６．２００ｋｃａ ｌ７ｋｇ−ｍｏ １２Ｆ
６Ｑ （Ｓ） ＋磯０２（ｇ） −＋ Ｆｅ２Ｏ，（ｓ
） ＋０７．６００ｋｃａ ｌ ７ｋｇ −ｍｏ Ｉ第
１表 製鉄ダストの成分（重量％）
第２表 製鉄ダストの粒度分市（重醍％）これら製鉄ダ
ストの内、）転炉シックナーダスト及び１ｔｌＸ炉ｔ１
目′Ｑダストを用い、酸化発火ゲス１−を行なった結果
、
転炉粗粒ダスト：３００℃（大気）まで加熱しても、目
視において殆ど変化しない。2Fe (s) + shame 02 (g) →Fe2O3 (sl
+ 196.200kcal 7kg-mo 12F
6Q (S) + Iso02 (g) −+ Fe2O, (s
) +07.600kcal 7kg -mo I Table 1 Components of steelmaking dust (weight%) Table 2 Particle size separation of steelmaking dust (weight%) Among these steelmaking dust, ) converter thickener dust and 1tlX furnace t1
As a result of performing oxidation ignition gas 1- using Eye'Q dust, the results were as follows: Converter coarse grain dust: Even when heated up to 300°C (atmosphere), there is almost no change in visual observation.
但しＦｅ０６〜１０％→１２％と若干 酸化される。However, Fe06~10% → 12% and slightly Oxidized.
転炉シックナー：３００℃（大気）は殆どＦｅＯはダス
ト Ｆｅ５０．に酸化される。１２０℃（大気
）付近にてバチバチ音を発し、
発火酸化される。Converter thickener: At 300℃ (atmosphere), FeO is mostly dust Fe50. oxidized to It emits a crackling sound at around 120℃ (atmosphere) and ignites and oxidizes.
ことが認められた。This was recognized.
即ち、含鉄ダストの性状によっては、酸化熱の利用が可
能である。That is, depending on the properties of the iron-containing dust, it is possible to utilize the heat of oxidation.
次に第１図に、転炉ダストの加熱酸化安定性をＦｅ１０
０ｇ当たりの化合物形態差として示す。Next, Fig. 1 shows the heating oxidation stability of converter dust with Fe10
It is shown as the difference in compound form per 0g.
第１図は、含鉄ダストとじて転炉シックナーダストと転
炉粗粒ダストを用いて、加熱をＮ２ガス及び大気中にお
いて行ない、加熱温度を室温、１０５℃、３００℃に変
化させた場合のＦｅ １００ｇ当たりの各々の化合物形
態を図示したものである。Figure 1 shows the results of heating using converter thickener dust and converter coarse grain dust as iron-containing dust, heating in N2 gas and atmosphere, and changing the heating temperature to room temperature, 105°C, and 300°C. The figure shows the form of each compound per 100g.
図示する如く、転炉シックナーダストの方が転炉■粒ゲ
スｌ−より鉄の酸化度が大であり、Ｎ２雰囲気より大気
中の方が、更に加熱湿度は室？Ｗｊｒ ＝３００℃に高
温に従って加熱酸化が進み、その臨界温度が約２００℃
にあることが認められた。As shown in the figure, the degree of oxidation of iron in the converter thickener dust is greater than that in the converter ■grain gas l-, and the heating humidity is higher in the atmosphere than in the N2 atmosphere. Heating oxidation progresses as the temperature increases to Wjr = 300°C, and its critical temperature is approximately 200°C.
It was recognized that there is.
次に代表的なゲスＩ−Ａ （Ｍｅ−Ｆｅ： ３５．０％
、 Ｆｅｄ：２５．７％、 Ｔ−Ｆｅ： ６５．８％）
ダｘ ｌ・Ｂ （Ｍｅ−Ｆｅ： ４１．０％。Next, typical Gess I-A (Me-Fe: 35.0%
, Fed: 25.7%, T-Fe: 65.8%)
Da x l・B (Me-Fe: 41.0%.
Ｆｅｄ： １９．２％、 Ｔ−Ｆｅ： ６ｇ、０％）及
びダＸｌ・Ｃ（Ｍｅ−Ｆｅ： ２４．２％、 Ｆｅｄ：
２３．０％、 Ｔ−Ｆｅ： ５１．８％）夫々を排ガ
ス温度３００℃の排ガスと接触せしめダスト中のＦｅ２
Ｏ，ｉの変化をしらべた結果、第２図が得られた。Fed: 19.2%, T-Fe: 6g, 0%) and DaXl.C (Me-Fe: 24.2%, Fed:
23.0%, T-Fe: 51.8%) were brought into contact with exhaust gas at an exhaust gas temperature of 300°C to
As a result of examining the changes in O and i, Figure 2 was obtained.
即ち、ＦｅＯ及びＴ−Ｆｅ含有量が比較的大であるダス
トＡ１
Ｆｅ０が比較的少な（Ｔ−Ｆｅが比較的に含量が多いダ
ストＢ１
Ｆｅ０含景が普通でＴ−Ｆｅ含量が少ないダストＣ１そ
の性状によってそのＦｅ２Ｏ，量変化に特徴があり、そ
の変化量は、
ダストＡ〉ダストＢ〉ゲス＋−Ｃ
てあり、
その含有成分の臨界量はＦｅＯにて２０重小形、Ｔ−ド
ｅで６０重量％で、それ以下の場合変化量が少ない、従
って本発明において含鉄ダスト成分をＦｅＯにて２０重
置数以上、Ｔ−Ｆｅにて６０重量％以上とした。That is, dust A1 has a relatively large content of FeO and T-Fe, dust B1 has a relatively low FeO content (comparatively high T-Fe content), dust C1 has a normal FeO content and a low T-Fe content, and so on. The amount of Fe2O varies depending on its properties, and the amount of change is as follows: Dust A〉Dust B〉Guess+-C The critical amount of the contained components is 20 heavy and small for FeO and 60 for T-doe. In terms of weight %, if it is less than that, the amount of change is small. Therefore, in the present invention, the iron-containing dust component is set to be 20 or more for FeO and 60 weight % or more for T-Fe.
次に実施例について述べる。Next, an example will be described.
第３図は、本発明に用いた実施例装置の説明図である。 FIG. 3 is an explanatory diagram of an example device used in the present invention.
図において、１及び１′はそれぞれＦｅを含む湿ダスト
ホッパー及び湿水砕スラグホッパー、２゜２′はロータ
リフィーダー、３及び３′はそれぞれ、含鉄ダスト及び
水砕スラグ装入管、４及び４′は円筒状反応容器、５は
プロセス排ガスブローワー、６及び６′は供給排ガス吹
込管、７は円筒状仕切り管、８及び８′はそれぞれ乾燥
含鉄ゲスｉ・及び水砕スラグ排出管、９及び９′はそれ
ぞれ乾燥含鉄ダスト及び水砕スラグホッパー、１０は乾
燥排気用導管、ｌ］、、、１．１’は排ガス集塵装置、
１２は導管、１３は空気ブローワーである。In the figure, 1 and 1' are respectively a wet dust hopper containing Fe and a wet granulated slag hopper, 2.2' is a rotary feeder, 3 and 3' are iron-containing dust and granulated slag charging pipes, respectively; 4 and 4. ' is a cylindrical reaction vessel, 5 is a process exhaust gas blower, 6 and 6' are supply exhaust gas blowing pipes, 7 is a cylindrical partition pipe, 8 and 8' are dry iron-containing gas I and granulated slag discharge pipes, 9 and 9' are dry iron-containing dust and granulated slag hoppers, 10 is a dry exhaust conduit, l], 1.1' is an exhaust gas dust collector,
12 is a conduit, and 13 is an air blower.
図示する如く、本発明の水砕スラグ乾燥装置ば、湿含鉄
ゲス）−及び水砕スラグ導入管３ならびに排気用導管１
０を上部に、プロセス排ガス吹込管６と乾燥含鉄ゲス１
−及び水砕スラグ排出管８とを下部に備えてなる円筒状
反応容器４と、反応容器４からの排ガス中の集塵装置１
１とから成っており、この円筒状反応容器４内において
、含鉄ダスト及び水砕スラグを下からブローワー５を介
して吹込まれるプロセス排ガスにより円筒状仕切り管７
を介して、順次それぞれ流動接触的に乾燥せしめろもの
である。As shown in the figure, the granulated slag drying apparatus of the present invention includes a wet iron-containing gas), a granulated slag introduction pipe 3, and an exhaust pipe 1.
0 on top, process exhaust gas blowing pipe 6 and dry iron-containing gas 1
- a cylindrical reaction vessel 4 comprising a granulated slag discharge pipe 8 at its lower part, and a dust collector 1 for collecting exhaust gas from the reaction vessel 4.
In this cylindrical reaction vessel 4, iron-containing dust and granulated slag are blown into a cylindrical partition pipe 7 by process exhaust gas blown from below via a blower 5.
They are each successively dried in a fluid catalytic manner.
なお、？＆動接触に当たっては、円筒状反応容器４を通
常の流動乾燥装置に変えてもよい。In addition,? For dynamic contact, the cylindrical reaction vessel 4 may be replaced with a normal fluidized drying device.
更にプロセス排ガス中の酸素含有量が少ない場合は空気
ブローワー１３を介して円筒状反応容器４に空気を供給
してもよい。Furthermore, if the oxygen content in the process exhaust gas is low, air may be supplied to the cylindrical reaction vessel 4 via the air blower 13.
第３図の装置を用いて、転炉ダスト（Ｍｅ−Ｆｅ：３５
．６％、Ｆｅｄ： ２５．７％、Ｔ−Ｆｅ： ６５．８
％、湿分４０％）を５００ｋｇ ／ Ｉｔの抽度にて、
湿含鉄ダストホッパー１より、ロータリーフィーダー２
を介して、グ含鉄ダスト装入管３より、円筒状反応容器
４に装入する。Using the apparatus shown in Fig. 3, converter dust (Me-Fe: 35
．． 6%, Fed: 25.7%, T-Fe: 65.8
%, moisture 40%) at a extraction rate of 500 kg/It.
From wet iron-containing dust hopper 1, rotary feeder 2
The iron-containing dust is charged into a cylindrical reaction vessel 4 through a charging pipe 3.
一方、３００℃の焼結クーラ或いは加熱炉のプロセス排
ガスを４５ＯＮ ｒｎ’ ／ Ｈの割合にて、ブローワ
ー５により、供給吹込管６を介して円筒状反応容器４の
下部から吹込む。On the other hand, process exhaust gas from a sintering cooler or heating furnace at 300° C. is blown into the cylindrical reaction vessel 4 from the lower part thereof through a supply blowing pipe 6 by a blower 5 at a rate of 45 ON rn'/H.
反応容器４内にて、湿含鉄ゲス）−は供給排ガスと流動
接触し、排ガス中の酸素と、湿含鉄ダスト中のＭｅ−Ｆ
ｅ、 ＦｅＯが反応し、酸化し、Ｆｅ２Ｏ，となる際発
熱し水分は排出導管１０を介して乾燥排ガス中に持ち去
られる。In the reaction vessel 4, the wet iron-containing gas) is in fluid contact with the supplied exhaust gas, and the oxygen in the exhaust gas and the Me-F in the wet iron-containing dust are
e. When FeO reacts and oxidizes to form Fe2O, heat is generated and moisture is carried away through the exhaust conduit 10 into the dry exhaust gas.
流動接触するに際し、反応容器４内に円筒状仕切り管７
を設けることにより、その流動接触はより有効に作用す
る。容器内の空間速度は１ ｍ／ｓｅｃ程度を維持すれ
ばよい。During fluid contact, a cylindrical partition pipe 7 is placed inside the reaction vessel 4.
By providing this, the fluid contact works more effectively. The space velocity within the container may be maintained at about 1 m/sec.
然る場合、乾燥含鉄ゲス１−が３００ｋｇ ／ Ｈ（湿
分：０）の割合にて含鉄ダスト排出管８を介して乾燥含
鉄ダストホッパー９に貯留され、乾燥排ガスは上部ＪＪ
Ｉ気導管導管、Ｌす７４９Ｎ ｍ’ ／ ＩＩの割合に
て５６０℃の排ガスが集塵装置１１に送られ、集塵装置
１１にて除塵し導管１２を経由し、次の円筒状反応容器
４′に送り込まれる。その条件は反応容器底部導管６′
にて７４９Ｎ ｎ１’ ／ Ｈ、５００℃である。In such a case, dry iron-containing gas 1- is stored in the dry iron-containing dust hopper 9 via the iron-containing dust discharge pipe 8 at a rate of 300 kg/H (moisture: 0), and the dry exhaust gas is discharged from the upper JJ.
Exhaust gas at a temperature of 560° C. is sent to the dust collector 11 at a ratio of 749 N m'/II, where it removes dust and passes through the conduit 12 to the next cylindrical reaction vessel 4. ’. The condition is that the bottom conduit 6' of the reaction vessel
at 749N n1'/H and 500°C.
第２の円筒状反応容器４′に、湿分１５％の水砕スラグ
を１０００ｋｇ ／ Ｈの割合にて水砕スラグホッパー
１′よす、ロータリーフィーダー２′を介シてスラグ導
入管３′より装入する。然る場合湿分０の乾燥スラグ８
５０ｋｇ ／ Ｈがスラグ排出管８′を介して、乾燥ス
ラグホッパー９′に貯留され、一方２００℃の排ガスが
１１２ＯＮ ｒｎ’ ／ Ｈの割合にて排出し、これら
排ガスは集塵装置１１′にて除塵され導管１２より排気
された。Granulated slag with a moisture content of 15% is fed into the second cylindrical reaction vessel 4' at a rate of 1000 kg/h from the slag introduction pipe 3' via the granulated slag hopper 1' and the rotary feeder 2'. Charge. In that case, dry slag with zero moisture 8
50 kg/H is stored in a dry slag hopper 9' via a slag discharge pipe 8', while exhaust gas at 200°C is discharged at a rate of 112 ON rn'/H, and these exhaust gases are collected in a dust collector 11'. Dust was removed and the air was exhausted from the conduit 12.
本発明の水砕スラグめ乾燥方法及び装置によれば、湿含
鉄ダスト自体が保有する成分の酸化反応熱と製鉄プロセ
スの低温排ガスとを組合せることにより、製鉄プロセス
湿含鉄ダスト及び排ガスの有効利用が可能となる。水砕
スラグの乾燥が製鉄所より発生する湿含鉄ダスト反応熱
と排熱で可能となるため、付加価値の高い水砕スラグが
セメント原料として供給できる等の効果を奏するもので
ある。According to the method and apparatus for drying granulated slag of the present invention, the oxidation reaction heat of the components contained in the wet iron-containing dust itself is combined with the low-temperature exhaust gas of the iron-making process, thereby effectively utilizing the wet iron-containing dust and exhaust gas of the iron-making process. becomes possible. Since the granulated slag can be dried using the wet iron-containing dust reaction heat and waste heat generated from the steelworks, it is possible to supply high value-added granulated slag as a raw material for cement.
また、湿含鉄ダストも同時に乾燥されるため、従来の天
日乾燥法等よりも短期に再利用可能な含鉄ダストとなる
。In addition, since the wet iron-containing dust is also dried at the same time, the iron-containing dust can be reused in a shorter period of time than in conventional solar drying methods.
第１図は、転炉ダストの２種を加熱温度、雰囲気を変え
た場合のダストの加熱酸化安定性をＦｅ１０（Ｉｇ当た
りの化合物形態を示した説明図、第２図は、各種ダスト
の３００℃排ガスと接触せしめた場合の時間とＦｅ２Ｏ
３の変化を示した説明図、第３図は、実施例装置の説明
図である。
図において、１，１’：湿含鉄ダスト及び水砕スラグホ
ッパー、３，３’ ： Ｑ含鉄ダスト及び水砕スラグ装
入管、４，４’ ：円筒状反応容器、５：排ガスブロー
ワー、６．６’？供給排ガス吹込管、８，８’ ：乾燥
含鉄ダスト及び水砕スラグ排出管、９，９’：乾燥含鉄
ダスト及び水砕スラグホッパー、１１，１１．’：排ガ
スｔＡ塵装置である。Figure 1 is an explanatory diagram showing the compound form per Fe10 (Ig) of the heating oxidation stability of two types of converter dust when the heating temperature and atmosphere were changed. Time and Fe2O when in contact with °C exhaust gas
FIG. 3 is an explanatory diagram of the example device. In the figure, 1, 1': wet iron-containing dust and granulated slag hopper, 3, 3': Q iron-containing dust and granulated slag charging pipe, 4, 4': cylindrical reaction vessel, 5: exhaust gas blower, 6 .6'? Supply exhaust gas blowing pipe, 8, 8': Dry iron-containing dust and granulated slag discharge pipe, 9, 9': Dry iron-containing dust and granulated slag hopper, 11, 11. ': Exhaust gas tA dust device.
Claims (1)
ダストの内部酸化熱を用い乾燥するに当たり該ダストと
排ガスとを流動接触的に反応させ、排ガスの温度を上昇
せしめ、続いて該スラグと高温化した前記排ガスとを流
動接触的に反応せしめ乾燥することを特徴とする水砕ス
ラグの乾燥方法。 ２）前記製鉄プロセスから発生するダストがＦｅＯ２０
重量％以上ならびにＴ−Ｆｅ６０重量％以上含有するこ
とを特徴とする特許請求の範囲第１項記載の水砕スラグ
の乾燥方法。 ３）前記排ガス温度が２００℃以上であることを特徴と
する特許請求の範囲第１項及び第２項記載の水砕スラグ
の乾燥方法。 ４）水砕スラグ及び製鉄プロセスから発生するダストの
導入管ならびに排気導管を上部に、排ガスの吹込管なら
びに乾燥スラグ及び反応済の前記ダストの排出管を下部
に備えてなる円筒状反応容器と前記反応容器からの排ガ
ス中のダスト集塵装置とからなり、該反応容器内におい
て前記製鉄プロセス発生ダスト及び水砕スラグと排ガス
を順次流動接触せしめ製鉄プロセス発生ダスト及びスラ
グを乾燥せしめることを特徴とする水砕スラグの乾燥装
置。 ５）前記製鉄プロセス発生ダストの発熱・乾燥装置及び
水砕スラグの乾燥装置を直列に配置したことを特徴とす
る特許請求の範囲第４項記載の水砕スラグの乾燥装置。[Claims] 1) When drying granulated slag using the internal oxidation heat of exhaust gas and dust generated from the iron-making process, the dust and exhaust gas are caused to react in a fluid catalytic manner to raise the temperature of the exhaust gas, and then A method for drying granulated slag, which comprises drying the slag by causing the slag to react with the heated exhaust gas in a fluidized catalytic manner. 2) The dust generated from the steel manufacturing process is FeO20
The method for drying granulated slag according to claim 1, characterized in that it contains 60% by weight or more of T-Fe and 60% by weight or more of T-Fe. 3) The method for drying granulated slag according to claims 1 and 2, wherein the exhaust gas temperature is 200°C or higher. 4) A cylindrical reaction vessel comprising an inlet pipe and an exhaust pipe for granulated slag and dust generated from the iron-making process at the upper part, and an exhaust pipe for exhaust gas and a discharge pipe for the dried slag and the reacted dust at the lower part; It is characterized by comprising a device for collecting dust in the exhaust gas from the reaction vessel, and in the reaction vessel, the dust and granulated slag generated in the iron-making process are sequentially brought into fluid contact with the exhaust gas to dry the dust and slag generated in the iron-making process. Granulated slag drying equipment. 5) The granulated slag drying device according to claim 4, characterized in that the device for heating and drying the dust generated in the iron-making process and the device for drying the granulated slag are arranged in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61022105A JPS62182138A (en) | 1986-02-05 | 1986-02-05 | Method and apparatus for drying water-granulated slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61022105A JPS62182138A (en) | 1986-02-05 | 1986-02-05 | Method and apparatus for drying water-granulated slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62182138A true JPS62182138A (en) | 1987-08-10 |
| JPH0542382B2 JPH0542382B2 (en) | 1993-06-28 |
Family
ID=12073609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61022105A Granted JPS62182138A (en) | 1986-02-05 | 1986-02-05 | Method and apparatus for drying water-granulated slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62182138A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017036858A (en) * | 2015-08-07 | 2017-02-16 | 株式会社Ihi | drying furnace |
-
1986
- 1986-02-05 JP JP61022105A patent/JPS62182138A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017036858A (en) * | 2015-08-07 | 2017-02-16 | 株式会社Ihi | drying furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0542382B2 (en) | 1993-06-28 |
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