JPH08246069A - Manufacture of sintered ore - Google Patents
Manufacture of sintered oreInfo
- Publication number
- JPH08246069A JPH08246069A JP5244295A JP5244295A JPH08246069A JP H08246069 A JPH08246069 A JP H08246069A JP 5244295 A JP5244295 A JP 5244295A JP 5244295 A JP5244295 A JP 5244295A JP H08246069 A JPH08246069 A JP H08246069A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- solid fuel
- sintering
- sintered
- sintered ore
- 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.)
- Withdrawn
Links
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
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、製鉄原料である焼結鉱
の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sintered ore which is a raw material for iron making.
【０００２】[0002]
【従来の技術】製鉄原料である焼結鉱は粉鉱石に粉石灰
石、粉コークス及び返鉱を配合した焼結鉱原料を焼結機
によって焼成して製造されている。このプロセスで焼結
鉱を製造する場合、焼結ベッド内の通気性を良くし、生
産性を確保しながら、製品となる焼結鉱の歩留りを向上
させる必要がある。通気性を向上させるためにはバイン
ダである石灰石の一部を生石灰と置換して焼結原料の擬
似粒子化を促進している。焼結操業は塩基度一定の条件
下で操業しており、ＣａＯ／ＳｉＯ2 ＝１．８〜２．２
となっている。2. Description of the Related Art Sintered ore, which is a raw material for iron making, is manufactured by firing a sintered ore raw material obtained by mixing powdered ore with powdered limestone, powdered coke and return ore by a sintering machine. When a sinter ore is produced by this process, it is necessary to improve the air permeability in the sinter bed and ensure the productivity while improving the yield of the sinter as a product. In order to improve the air permeability, a part of the limestone that is the binder is replaced with quick lime to promote the pseudo-particle formation of the sintering raw material. The sintering operation is performed under the condition that the basicity is constant, and CaO / SiO 2 = 1.8 to 2.2.
Has become.
【０００３】生石灰添加による通気改善メカニズムは次
の通りである。 １）生石灰はバインダの役目をし、擬似粒子径を増大さ
せ通気抵抗を減ずる。 ２）焼結過程では上層で焼結が起って原料中の水分が蒸
発し、この水分が下層部の低温域で凝縮するが、生石灰
は擬似粒子の強度を増大し、焼結ベッド内の湿潤帯で水
分による擬似粒子の崩壊を抑制し、粒子径Ｄp の低下を
防止する。The mechanism for improving ventilation by adding quick lime is as follows. 1) Quick lime acts as a binder, increasing the pseudo-particle size and reducing ventilation resistance. 2) In the sintering process, sintering occurs in the upper layer, water in the raw material evaporates, and this water condenses in the lower temperature region of the lower layer, but quick lime increases the strength of pseudo particles and In the wet zone, the pseudo particles are prevented from collapsing due to water, and the particle diameter D p is prevented from decreasing.
【０００４】生石灰の通気改善の効果はベースとしての
生産率１．２５ｔ／ｈ・ｍ2 、生石灰添加量１１ｋｇ／
ｔ−ｓに対して下式に示すとおりである。 添加生石灰量＝２０×生産率変化量 従って、生産率０．１ｔ／ｈ・ｍ2 増加するために、生
石灰を２．０ｋｇ／ｔ−ｓ以上添加して操業している。The effect of improving the ventilation of quicklime is 1.25 t / h · m 2 as a base, and the addition amount of quicklime is 11 kg /
It is as shown in the following formula with respect to ts. Amount of added quick lime = 20 × amount of change in production rate Therefore, in order to increase the production rate by 0.1 t / h · m 2 , 2.0 kg / t-s or more of quick lime is added for operation.
【０００５】一方、焼結製造に使用される鉄原料として
は焼結鉱のコスト削減を図る上で安価であるペレットフ
ィード（ＰＦ）および高結晶水鉱石を多量に配合する傾
向にある。ペレットフィードを多量に配合すると粒子が
細かいため焼結製造時に通気性が悪化する。また、高結
晶水鉱石を多量に配合すると、高結晶水鉱石は加熱後の
気孔率が高いために溶融化速度が速く、またＡｌ2 Ｏ3
成分が高いために融液の粘性が高い。したがって焼結の
溶融帯で通気性が悪化する。ペレットフィード及び高結
晶水鉱石の多量使用時には通気改善策として生石灰の配
合増加によって対処している。On the other hand, as an iron raw material used for sintering production, pellet feed (PF) and highly crystalline water ore, which are inexpensive, tend to be mixed in large amounts in order to reduce the cost of the sintered ore. If a large amount of pellet feed is blended, the fineness of the particles will deteriorate the air permeability during sintering production. Further, when a large amount of high crystal water ore is blended, the high crystal water ore has a high porosity after heating and thus has a high melting rate, and Al 2 O 3
Since the components are high, the viscosity of the melt is high. Therefore, air permeability deteriorates in the melting zone of sintering. When a large amount of pellet feed or high crystal water ore is used, it is dealt with by increasing the content of quicklime as a ventilation improvement measure.
【０００６】このように生石灰の配合増加は通気性改善
手段として有効であるが、生石灰は高価であり、また、
生石灰原単位が２０ｋｇ／ｔ−ｓ以上になるとその通気
改善効果は飽和する。また、焼結鉱の歩留りを向上させ
るためには焼結鉱の落下強度を向上させる必要がある。
通常、コークスは原料に対して３〜４重量％添加してい
る。焼結操業ではコークス添加量を増し、コークスの燃
焼熱量の増大により、鉱石の溶融性を増すことにより結
合性を高め、落下強度（ＳＩ）の向上を図っている。し
かし、コークスは高価であり、焼結鉱コストを低減する
ため、なるべくコークスの使用料を少量にすることが経
済的となる。As described above, increasing the content of quick lime is effective as a means for improving air permeability, but quick lime is expensive and
When the unit of quick lime exceeds 20 kg / ts, the effect of improving ventilation is saturated. Further, in order to improve the yield of the sintered ore, it is necessary to improve the drop strength of the sintered ore.
Usually, coke is added in an amount of 3 to 4% by weight based on the raw material. In the sintering operation, the amount of coke added is increased, the heat of combustion of the coke is increased, the melting property of the ore is increased, the bondability is increased, and the drop strength (SI) is improved. However, coke is expensive, and since the cost of sinter is reduced, it is economical to use as little coke as possible.
【０００７】[0007]
【発明が解決しようとする課題】本発明は上記生石灰の
通気性向上効果の頭打ちを解消し、さらにコークスの使
用量低減を図ることの両面から、コークスの一部を通気
性向上に貢献する材料に置換することについて研究し、
通気性を向上させると共に、落下強度（ＳＩ）、還元崩
壊性（ＲＤＩ）等の物性や歩留りを低下させない焼結鉱
製造方法について研究した。本発明はそのような新規技
術を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned effect of quicklime on the breathability improving effect, and further reduces the amount of coke used, so that a part of the coke contributes to improving the breathability. Research into replacing
A method for producing a sintered ore that improves the air permeability and does not reduce the physical properties such as drop strength (SI) and reduction disintegration (RDI) and the yield was studied. The present invention aims to provide such a novel technique.
【０００８】また、ペレットフィード及び高結晶水鉱石
の多量配合時において、生石灰より安価で効果の大きい
通気性改善剤を使用し、高生産率を維持する製造方法を
提供することを目的とする。Another object of the present invention is to provide a manufacturing method for maintaining a high production rate by using a gas permeability improver which is cheaper and more effective than quick lime when a pellet feed and a high crystal water ore are mixed in a large amount.
【０００９】[0009]
【課題を解決するための手段】本発明は、製鉄原料用の
焼結鉱を製造するに際し、一般生活ゴミを固形化した固
形燃料片をコークスの一部と置換し、焼結用燃料として
使用することを特徴とする焼結鉱の製造方法である。本
発明において一般生活ゴミを固形化した固形燃料片と
は、都市ゴミ等の一般生活ゴミを選別圧砕押出成形した
固形片であって、直径３〜５ｍｍ、長さ５〜１０ｍｍ程
度の円柱形の粒体物をいう。この固形燃料片は有機物等
を主として含み揮発成分が比較的多く、また、親水性に
富み、発熱量４７００ｃａｌ／ｇ程度のものである。前
記コークスの一部に代替する量は焼結用コークスに対し
て発熱量換算で１０％以下とする。According to the present invention, when producing a sintered ore for ironmaking raw material, a solid fuel piece obtained by solidifying general household waste is replaced with a part of coke and used as a sintering fuel. And a method for producing a sintered ore. In the present invention, the solid fuel piece obtained by solidifying general household waste is a solid piece obtained by selecting and crushing general household waste such as municipal waste, and having a cylindrical shape with a diameter of 3 to 5 mm and a length of 5 to 10 mm. It refers to granules. This solid fuel piece mainly contains organic substances and the like, has a relatively large amount of volatile components, is rich in hydrophilicity, and has a calorific value of about 4,700 cal / g. The amount of the coke replaced with part of the coke is 10% or less in terms of calorific value with respect to the sintering coke.
【００１０】この場合にこの固形燃料編を焼結ベッド層
の下半分の層内にその装入量の７０％以上を堆積させる
と好適である。In this case, it is preferable that 70% or more of the charging amount of the solid fuel knit is deposited in the lower half layer of the sintered bed layer.
【００１１】[0011]
【作用】製鉄原料用の焼結鉱は、鉄鉱石、粉コークス、
石灰石、ドロマイト、蛇紋岩および返鉱等を貯槽から配
合条件に応じて切り出し、配合した原料をドラムミキサ
で混合造粒した後、焼結機に装入して焼成するプロセス
である。この焼成の際に粉コークスの一部代替燃料とし
て、一般生活ゴミを固形化した固形燃料片を添加する。[Function] Sintered ore for ironmaking raw material is iron ore, powder coke,
This is a process in which limestone, dolomite, serpentine, return ore, etc. are cut out from a storage tank according to the mixing conditions, the mixed raw materials are mixed and granulated by a drum mixer, and then charged into a sintering machine and fired. During this firing, solid fuel pieces obtained by solidifying general household waste are added as a partial substitute fuel for powder coke.
【００１２】本発明で用いる固形燃料片は、上記のよう
に、従来廃棄されていた一般生活ゴミを固形化したもの
で、資源の有効利用を図ることとなる。粉鉱石を焼結さ
せるためには強度を維持する上で燃料の添加必要量及び
生産量を確保するために通気性改善は非常に重要であ
る。しかも、コスト低減に対して安価な燃料及び通気改
善スペーサを必要とする。As described above, the solid fuel piece used in the present invention is obtained by solidifying the general household waste that has been conventionally discarded, so that the resources can be effectively used. In order to maintain the strength for sintering the powdered ore, it is very important to improve the air permeability in order to secure the required amount of fuel to be added and the production amount. Moreover, in order to reduce the cost, an inexpensive fuel and a ventilation improving spacer are required.
【００１３】そこで、従来廃棄されていた生活ゴミを固
形化した、固形燃料片（例えば商品名：タウンコール）
を焼結用燃料として活用した。この場合、固形燃料片は
コークス粉と異なり、生活ゴミを原料にするため親水性
に富み、鉱石粉が該固形燃料片の固まりに付着し、擬似
粒子化を増大させる効果も持つ。表１に固形燃料片の一
例の性状、化学分析および発熱量をコークスと比較して
示す。[0013] Therefore, solid fuel pieces (for example, trade name: Towncoal) obtained by solidifying household waste that has been conventionally discarded
Was used as a fuel for sintering. In this case, unlike the coke powder, the solid fuel piece is rich in hydrophilicity because it uses domestic waste as a raw material, and the ore powder adheres to the mass of the solid fuel piece, which also has the effect of increasing pseudo particle formation. Table 1 shows the properties, chemical analysis and calorific value of one example of the solid fuel piece in comparison with coke.
【００１４】固形燃料片をコークスと置換することにつ
いて試験を行った。まず、焼結鍋試験において、コーク
スに対する固形燃料片の置換率が焼結鉱の歩留り、通気
性（生産性）に及ぼす影響を調べた。ここで、置換率は
コークス量を１００とし、そのうち発熱量換算で置換し
た固形燃料片の配合パーセントを云う。Tests were conducted on replacing solid fuel pieces with coke. First, in a sinter pot test, the effect of the substitution rate of solid fuel pieces for coke on the yield and air permeability (productivity) of sinter was investigated. Here, the substitution rate means the blending percentage of the replaced solid fuel piece in terms of calorific value, where the coke amount is 100.
【００１５】図２にコークスの一部を固形燃料片に発熱
量換算で置換した場合の焼結鉱歩留りに及ぼす影響を示
す。鍋試験ではコークスに対して固形燃料片をコークス
発熱量換算１０％以上置換すると歩留り低下傾向を示
す。これは固形燃料片はコークスと比較して粒度がほぼ
一定の棒状の粒体であり、原料中に偏在することによる
と考えられる。すなわち、固形燃料片を用いると焼結過
程において焼結層内で局部的に温度が高い部分と低い部
分が存在し、歩留りの低下原因になっている。一方、図
３にコークスとの置換率と通気性の関係を示す。固形燃
料片の置換率が１０％を越えると通気性は顕著に増加す
る。しかし歩留りの点から固形燃料片の置換はコークス
の１０％以下にすることが好ましい。FIG. 2 shows the effect on the sintered ore yield when a part of the coke is replaced with a solid fuel piece in terms of calorific value. In the pan test, when solid fuel pieces are replaced by 10% or more of coke calorific value, the yield tends to decrease. It is considered that this is because the solid fuel pieces are rod-shaped particles having a substantially constant particle size as compared with coke, and are unevenly distributed in the raw material. That is, when the solid fuel pieces are used, there are locally high temperature portions and low temperature portions in the sintered layer during the sintering process, which causes a decrease in yield. On the other hand, FIG. 3 shows the relationship between the substitution rate with coke and air permeability. When the substitution rate of the solid fuel pieces exceeds 10%, the air permeability is remarkably increased. However, from the viewpoint of yield, it is preferable that the replacement of the solid fuel pieces is 10% or less of the coke.
【００１６】次に、固形燃料片を焼結ベッド層の下半分
に多量に堆積させることについて説明する。焼結では一
般に見掛比重の小さい鉱石は原料層の嵩密度が小さく、
焼結ケーキ状態で空隙の大きい焼結鉱が製造される。ま
た、嵩密度が小さいほど、通気性は良好である。そこで
焼結ベット内の嵩密度を減少させるには嵩密度の小さい
固形燃料片をスペーサとして使用することとした。固形
燃料片はコークスより見掛比重が小さい。この特質を最
大限に活用するには、焼結ベッド層の下半分に多く配合
されるようにするのがよい。図３には、固形燃料片を焼
結ベッド層の上下層に均一に装入した場合と、下半分の
下層部にその８０％を上層部に２０％を装入したときの
通気性を示している。焼結ベッド層の上層部は装入シュ
ートからの落下距離が小さいために原料層の空隙率は大
きいが、この部分に嵩密度の大きい物質を堆積させると
通気性が増大し強度および歩留りが低下し、逆効果とな
る。Next, the large amount of solid fuel pieces deposited on the lower half of the sintered bed layer will be described. In sintering, ores, which have a low apparent specific gravity, generally have a low bulk density in the raw material layer,
Sintered ore with large voids is produced in a sintered cake state. Further, the smaller the bulk density, the better the air permeability. Therefore, in order to reduce the bulk density in the sintering bed, it was decided to use solid fuel pieces having a low bulk density as spacers. Solid fuel pieces have a smaller apparent specific gravity than coke. In order to make the best use of this property, it is preferable to add a large amount to the lower half of the sintered bed layer. FIG. 3 shows the air permeability when the solid fuel pieces were uniformly charged in the upper and lower layers of the sintering bed layer and when 80% of the lower half of the lower half and 20% of the upper half were charged. ing. The porosity of the raw material layer is large in the upper part of the sintered bed layer because the distance dropped from the charging chute is small, but when a substance with a large bulk density is deposited in this part, the air permeability increases and the strength and yield decrease. However, it has the opposite effect.
【００１７】一方、焼結ベッド層の下層部は、上層から
の熱の導入により高温となり、冷却時間も長くなるた
め、圧損の大きい溶融帯の幅が増大する。この溶融帯の
部分に固形燃料片を堆積すると、固形燃料片が燃焼して
空洞が形成され、圧損を低下させる。この焼結ベッド層
の半分より下側の層内に固形燃料片が７０％以上になる
ように堆積させる効果があり、上層と下層に均一に５０
％含有させると上層の歩留りが低下することとなり好ま
しくない。この固形燃料片を焼結ベッド層の下半分の層
内への配合比率は高い程好ましいが焼結原料をパレット
に供給するとき偏析させるには技術的に限度があり、可
能な上限は８０％程度となる。On the other hand, the lower layer portion of the sintered bed layer is heated to a high temperature due to the introduction of heat from the upper layer, and the cooling time is prolonged. When solid fuel pieces are deposited on the portion of the melting zone, the solid fuel pieces burn to form cavities and reduce pressure loss. It has the effect of depositing 70% or more of the solid fuel pieces in the layer below the half of this sintered bed layer, and evenly deposits it in the upper and lower layers.
%, It is not preferable because the yield of the upper layer decreases. The higher the mixing ratio of this solid fuel piece in the lower half of the sintering bed layer is, the more preferable it is, but there is a technical limit to segregate the sintering raw material when supplying the sintering raw material to the pallet, and the possible upper limit is 80%. It will be about.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】[0020]
【実施例】図１に本発明を実施した焼結プロセスのフロ
ーを示す。また、表３に原料の配合条件、表４にコーク
ス、固形燃料片の添加割合と操業条件を示す。配合条件
によって配合槽１から切り出された一般生活ゴミを固形
化した固形燃料片３を含んだ粉鉱石、副原料及びコーク
ス等の配合原料はドラムミキサ４、給鉱ホッパ５、ドラ
ムフィーダ６及びドラムシュート７を経てパレット上に
装入され、焼結した。図４に示すようにドラムフィーダ
６とドラムシュート７との水平距離１１、垂直距離１２
を変更すると焼結ベッド８の分布が変化する。表５にド
ラムシュートの水平、垂直移動位置ケース１〜６を示し
た。図５に図４に示すドラムシュート位置と固形燃料片
が焼結ベッド層の下半分の層内に堆積した割合を示す。
図５から明らかなように固形燃料を下層部に所定割合に
堆積させるにはドラムシュートの位置を調整することに
よって達成できる。EXAMPLE FIG. 1 shows a flow of a sintering process in which the present invention is carried out. Further, Table 3 shows the mixing conditions of the raw materials, and Table 4 shows the addition ratios of coke and solid fuel pieces and the operating conditions. Blended raw materials such as powdered ore containing solid fuel pieces 3 obtained by solidifying general household waste cut out from the blending tank 1 according to blending conditions, auxiliary raw materials, coke, and the like are a drum mixer 4, a feed hopper 5, a drum feeder 6, and a drum chute. It was loaded onto a pallet via No. 7 and sintered. As shown in FIG. 4, a horizontal distance 11 and a vertical distance 12 between the drum feeder 6 and the drum chute 7 are set.
Is changed, the distribution of the sintering bed 8 changes. Table 5 shows the horizontal and vertical movement position cases 1 to 6 of the drum chute. FIG. 5 shows the drum chute positions shown in FIG. 4 and the proportion of solid fuel pieces deposited in the lower half layer of the sintered bed layer.
As is clear from FIG. 5, the solid fuel can be deposited in the lower layer at a predetermined ratio by adjusting the position of the drum chute.
【００２１】表４の操業条件下で操業試験した結果を図
６に示す。図６からコークスの添加量（３．４％）に対
して固形燃料片３を発熱量換算で１０％置換しても、冷
間強度及び歩留りは従来とほぼ同等に維持できた。ま
た、還元崩壊性指数ＲＤＩは大きな変化がみられなかっ
た。一方、生産率一定操業下では固形燃料片３をコーク
スに対して１０％を越えて置換した場合、通気性改善手
段として従来使用されている生石灰原単位は顕著に低下
した。特にドラムシュートの位置を調整し、固形燃料片
３の装入量に対して、７０〜８０％を焼結ベッド層の下
半分の層内に堆積させることによって生石灰原単位はさ
らに低下した。これは固形燃料片はコークスに比べて比
重が小さく、パレット上での充填密度が低下するため、
および燃焼後に溶融帯部で固形燃料片跡に空洞が形成さ
れるため通気性が大幅に改善したものと考えられる。The results of the operation test under the operating conditions shown in Table 4 are shown in FIG. From FIG. 6, even if the solid fuel piece 3 was replaced by 10% in terms of calorific value with respect to the amount of coke added (3.4%), the cold strength and the yield could be maintained almost the same as in the conventional case. Further, the reductive disintegration index RDI did not show a large change. On the other hand, when the solid fuel piece 3 was replaced with more than 10% of the coke under the constant production rate operation, the quicklime basic unit conventionally used as the air permeability improving means was remarkably lowered. Particularly, by adjusting the position of the drum chute and depositing 70 to 80% of the solid fuel piece 3 in the lower half layer of the sintered bed layer, the quicklime basic unit was further reduced. This is because the solid fuel piece has a smaller specific gravity than coke and the packing density on the pallet decreases,
Moreover, it is considered that the air permeability was significantly improved because the voids were formed in the solid fuel traces in the molten zone after combustion.
【００２２】図７及び図８にペレットフィードおよび高
結晶水鉱石の高配合時に固形燃料片を添加した場合の操
業試験結果を示す。図７及び図８からペレットフィード
及び高結晶結晶水鉱石の高配合下では固形燃料片を添加
し、さらに７０〜８０％を焼結ベット層の下半分の層内
に堆積させることによって生石灰原単位を大幅に削減す
ることができた。FIG. 7 and FIG. 8 show the results of the operation test when solid fuel pieces were added at the time of high blending of pellet feed and high crystal water ore. From FIGS. 7 and 8, solid fuel pieces were added under high proportions of pellet feed and highly crystalline water ore, and 70-80% was further deposited in the lower half layer of the sintered bed layer to obtain the quicklime basic unit. Could be significantly reduced.
【００２３】このように本発明による安価な一般生活ゴ
ミを固形化した燃料をコークスと一部代替しても歩留り
および品質上問題なく、低生石灰原単位で焼結操業をす
ることができた。As described above, even if the fuel for solidifying inexpensive general household waste according to the present invention was partially replaced with coke, there was no problem in yield and quality, and the sintering operation could be performed with a low-calcium lime unit.
【００２４】[0024]
【表３】 [Table 3]
【００２５】[0025]
【表４】 [Table 4]
【００２６】[0026]
【表５】 [Table 5]
【００２７】[0027]
【発明の効果】以上説明したように、本発明は焼結機で
は焼結鉱を製造する際に原料配合中のコークス燃料に対
して一般生活ゴミを固形化した燃料片を１０％以下置換
して焼結することとしたので、コークスの熱源の代替と
して効果があり、焼結歩留り低下を招くことなく管理基
準内で焼結操業を行うことができた。また生石灰原単位
の低減に寄与し、焼結鉱製造コストの大幅な低減となっ
たばかりでなく、資源リサイクルに対して効果が大き
い。As described above, according to the present invention, in the case of producing a sinter in the sintering machine, 10% or less of the fuel pieces obtained by solidifying general household waste are replaced with the coke fuel in the raw material mixture. Since it was decided to sinter, it was effective as a substitute for the heat source of coke, and the sintering operation could be carried out within the control standard without lowering the sintering yield. In addition, it contributes to the reduction of quick lime consumption, which not only greatly reduces the production cost of sinter, but also has a great effect on resource recycling.
【図１】本発明による焼結プロセスフローを示す説明図
である。FIG. 1 is an explanatory diagram showing a sintering process flow according to the present invention.
【図２】試験鍋によるコークスに対する固形燃料片の置
換率と歩留関係を示すグラフである。FIG. 2 is a graph showing a replacement ratio of solid fuel pieces to coke in a test pot and a yield relationship.
【図３】置換率と通気性の関係を示すグラフである。FIG. 3 is a graph showing a relationship between a substitution rate and air permeability.
【図４】焼結ベッドの下層部に固形燃料片を所定量堆積
させる方法の説明図である。FIG. 4 is an explanatory view of a method of depositing a predetermined amount of solid fuel pieces on a lower layer portion of a sintering bed.
【図５】本発明の実施例の説明図である。FIG. 5 is an explanatory diagram of an example of the present invention.
【図６】本発明の実施例の説明図である。FIG. 6 is an explanatory diagram of an example of the present invention.
【図７】ペレットフィード高配合時の効果を示すグラフ
である。FIG. 7 is a graph showing the effect of high pellet feed composition.
【図８】高結晶水鉱石配合時の効果を示すグラフであ
る。FIG. 8 is a graph showing the effect of adding a high crystal water ore.
１ 貯槽 ２ コークス ３ 固形燃料片 ４ ドラムミキ
サ ５ 給鉱ホッパ ６ ドラムフィ
ダー ７ ドラムシュート ８ 焼結ベッド1 Storage Tank 2 Coke 3 Solid Fuel Piece 4 Drum Mixer 5 Feeding Hopper 6 Drum Feeder 7 Drum Chute 8 Sinter Bed
Claims (3)
一般生活ゴミを固形化した固形燃料片をコークスの一部
と置換し、焼結用燃料として使用することを特徴とする
焼結鉱の製造方法。1. When manufacturing a sintered ore for ironmaking raw material,
A method for producing a sintered ore, comprising replacing a solid fuel piece obtained by solidifying general household waste with a part of coke and using the solid fuel piece as a sintering fuel.
１０％以下であることを特徴とする請求項１記載の焼結
鉱の製造方法。2. The method for producing a sintered ore according to claim 1, wherein a part of the coke is 10% or less of the coke for sintering.
燃料片の装入量の７０％以上を堆積させることを特徴と
する請求項１記載の焼結鉱の製造方法。3. The method for producing a sintered ore according to claim 1, wherein 70% or more of the amount of the solid fuel pieces charged is deposited in the lower half layer of the sintered bed layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5244295A JPH08246069A (en) | 1995-03-13 | 1995-03-13 | Manufacture of sintered ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5244295A JPH08246069A (en) | 1995-03-13 | 1995-03-13 | Manufacture of sintered ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08246069A true JPH08246069A (en) | 1996-09-24 |
Family
ID=12914858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5244295A Withdrawn JPH08246069A (en) | 1995-03-13 | 1995-03-13 | Manufacture of sintered ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08246069A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010106756A1 (en) * | 2009-03-16 | 2010-09-23 | 新日本製鐵株式会社 | Process for producing sintered ore |
| JP2013517385A (en) * | 2010-01-19 | 2013-05-16 | テガ インダストリーズ リミテッド | Blast furnace mixing drum |
| CN113215392A (en) * | 2021-04-28 | 2021-08-06 | 德龙钢铁有限公司 | Method for preparing fuel by sintering material and fuel preparation device |
-
1995
- 1995-03-13 JP JP5244295A patent/JPH08246069A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010106756A1 (en) * | 2009-03-16 | 2010-09-23 | 新日本製鐵株式会社 | Process for producing sintered ore |
| JP4837799B2 (en) * | 2009-03-16 | 2011-12-14 | 新日本製鐵株式会社 | Method for producing sintered ore |
| KR101409516B1 (en) * | 2009-03-16 | 2014-06-19 | 신닛테츠스미킨 카부시키카이샤 | Process for producing sintered ore |
| JP2013517385A (en) * | 2010-01-19 | 2013-05-16 | テガ インダストリーズ リミテッド | Blast furnace mixing drum |
| CN113215392A (en) * | 2021-04-28 | 2021-08-06 | 德龙钢铁有限公司 | Method for preparing fuel by sintering material and fuel preparation device |
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| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
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