JPH03183730A - Manufacture of quicklime by sintering machine - Google Patents
Manufacture of quicklime by sintering machineInfo
- Publication number
- JPH03183730A JPH03183730A JP32258789A JP32258789A JPH03183730A JP H03183730 A JPH03183730 A JP H03183730A JP 32258789 A JP32258789 A JP 32258789A JP 32258789 A JP32258789 A JP 32258789A JP H03183730 A JPH03183730 A JP H03183730A
- Authority
- JP
- Japan
- Prior art keywords
- quicklime
- sintering machine
- limestone
- pallet
- mixture
- 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
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000005245 sintering Methods 0.000 title claims abstract description 28
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 20
- 235000012255 calcium oxide Nutrition 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 235000019738 Limestone Nutrition 0.000 claims abstract description 24
- 239000006028 limestone Substances 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000000571 coke Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ドワイトロイド式焼結機を用いた高炉用原料
の焼結工程において、焼結機パレットの最上層で生石灰
を製造する方法に係わり、生石灰の品質及び生産性を向
上する方法に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for producing quicklime in the uppermost layer of a sintering machine pallet in a process of sintering raw materials for a blast furnace using a Dwight Lloyd sintering machine. The present invention relates to a method for improving the quality and productivity of quicklime.
〈従来の技術〉
ドワイトロイド式焼結機を用いた高炉用原料の焼結操業
の模式図を第１図に示す、床敷鉱用ホンパー３からパレ
ット１上に切出された床敷鉱の上に給鉱ホツパ−４から
切出された焼結原料２を積層して供給する。原料２は点
火装置！ｆ１５で点火されメインブロワ−１４の通風に
より焼結原料中の粉コークスは燃焼し、焼結原料は坑底
されて焼結鉱となる。焼結鉱は粉砕機５で粉砕され、ク
ーラー６で冷却された後、篩分は機７で分級される。そ
して篩上の粒径８〜１６ｍｍの成品は床敷鉱ｌＯとして
床敷ホッパー３に戻されて、残余は成品１３として高炉
に輸送される。一方分級された粒径５Ｈ以下のものは返
し絋１１としてξキサー８によって新原料１２と混合さ
れた後給鉱ホッパー４に戻される。<Prior art> Figure 1 shows a schematic diagram of a sintering operation for blast furnace raw materials using a Dwight Lloyd sintering machine. The sintering raw material 2 cut out from the ore feed hopper 4 is stacked and supplied on top. Raw material 2 is the ignition device! It is ignited at f15, and the coke powder in the sintering raw material is combusted by ventilation from the main blower 14, and the sintering raw material is brought to the bottom of the pit and becomes sintered ore. The sintered ore is crushed by a crusher 5, cooled by a cooler 6, and the sieved ore is classified by a machine 7. The product on the sieve with a particle size of 8 to 16 mm is returned to the bedding hopper 3 as bedding ore 1O, and the remainder is transported to the blast furnace as product 13. On the other hand, the classified particles having a particle diameter of 5H or less are returned to the ore feed hopper 4 after being mixed with new raw material 12 by a ξ mixer 8 as a return wire 11.
さて、一般にパレット上の原料２の通気性を改善する手
段として、バインダーを原料中に混合することがあり、
バインダーとしては普通生石灰（Ｃａｂ）がよく用いら
れている。Generally, as a means to improve the air permeability of the raw material 2 on the pallet, a binder may be mixed into the raw material.
Quicklime (Cab) is commonly used as a binder.
このＣａＯを安価に製造する方法として、特開昭５Ｂ−
１３３３３１号公報には石灰石（ＣａＣＯｓ ）粉９を
石灰用ホンパー１９から切り出し、原料２の最上部に積
層させ点火装置！ｆ１５内の熱によって下記（り式の反
応を行わせ、
ＣａＣＯ３’ ＣａＯ−＋−ＣＯｇ＋ΔＨ−−−−−−
（１）（ΔＨ：エンタルピー差）
石灰石粉から生石灰粉を製造する方法が提案されている
。As a method for producing this CaO at low cost, JP-A-5B-
Publication No. 133331 discloses that limestone (CaCOs) powder 9 is cut out from a lime pumper 19, layered on top of the raw material 2, and an ignition device is created! The heat in f15 causes the reaction of the following formula to occur: CaCO3' CaO-+-COg+ΔH--
(1) (ΔH: enthalpy difference) A method for producing quicklime powder from limestone powder has been proposed.
しかし、石灰石の焼成時のパレット幅方向における温度
分布が均一でなく、サイド側の方が他の部分より低いた
め、サイド側に坑底の照準を合わせれば中心側の石灰石
は過焼成が多く、中心側に照準を合わせればサイド側は
未焼成が多くなり、生産効率上また品質上問題があった
。However, when firing limestone, the temperature distribution in the width direction of the pallet is not uniform, and the sides are lower than other parts, so if you aim at the bottom of the pit on the side, the limestone on the center side will be more likely to be overfired. If the aim was to focus on the center side, there would be a lot of unfired material on the side sides, which caused problems in terms of production efficiency and quality.
〈発明が解決しようとする課題〉
本発明の目的は、焼結工程を利用した生石灰の製造方法
において、従来より高効率で、かつ高品質の生石灰を製
造する方法を提供することにある。<Problems to be Solved by the Invention> An object of the present invention is to provide a method for producing quicklime using a sintering process with higher efficiency and higher quality than before.
く課題を解決するための手段〉
すなわち、本発明は、ドワイトロイド式焼結機を用いた
焼結工程において、焼結機パレットの最上層に石灰石粉
ど粉コークスの混合物を装入して点火炉内の熱によって
石灰石わ】から生石灰粉を生成する際に、パレット最上
層部で幅方向中央部のほぼ加熱温度が均一になる部分に
凹部を形成し、該凹部に該混合物を装填することを特徴
とする焼結機での生石灰の製造方法である。Means for Solving the Problems〉 That is, the present invention provides a sintering process using a Dwight Lloyd type sintering machine, in which a mixture of limestone powder coke is charged into the top layer of a sintering machine pallet, and When producing quicklime powder from limestone by the heat in the furnace, a recess is formed in the uppermost layer of the pallet at the center in the width direction where the heating temperature is almost uniform, and the mixture is loaded into the recess. This is a method for producing quicklime using a sintering machine.
く作 川〉
本発明者は第１図に示す焼結機において、パレット幅方
向にお６ノる点火炉内での加熱温度の分布及び９００°
Ｃ以上の保持時間の分布を測定した。その結果をそれぞ
れ第２図及び第３図に示す。Kusaku Kawa> In the sintering machine shown in FIG.
The distribution of retention times of C or higher was measured. The results are shown in FIGS. 2 and 3, respectively.
因みに石灰石は９００°Ｃ以上の温度で分解するので９
００℃以上での保持時間が生産性を左右する。By the way, limestone decomposes at temperatures above 900°C, so
The holding time at 00°C or higher determines productivity.
これによるとパレットの幅方向中央部においてはほぼ均
一な加熱温度が得られており、また９００℃以上を保っ
ている時間も均一な状態が得られている。According to this, a substantially uniform heating temperature was obtained in the widthwise central portion of the pallet, and a uniform state was also obtained in the time period during which the temperature was maintained at 900° C. or higher.
本発明では、このほぼ均一な加熱温度を有する中央ＳＪ
ｌ域に予め凹部を形成し、ここに原料である石灰石粉と
粉コークスの混合物を装填するようにしたので、原料全
体が同様に均熱され、はぼ均一な品質の生石灰を効率よ
く生産することができる。In the present invention, the central SJ having this almost uniform heating temperature
Since a recess is formed in advance in area 1 and a mixture of limestone powder and coke powder, which are the raw materials, is loaded therein, the entire raw material is uniformly heated, and quicklime of uniform quality is efficiently produced. be able to.
次に上記装填を行うための具体的装置の一例を第４図に
示す、焼結給鉱ホッパ−４から切出される原料２のＮＷ
、をゲートセット１Ｇにより部分的に制御する。このゲ
ートセット１６は多数のゲートの組み合わせであり、バ
レント幅方向において、原料層厚の部分的制御を可能に
する装置である。このゲートセラ目６により焼成条件が
均一である領域に石灰石を装入する幅に対し、予め第５
図のように凹部を形成しておく、その後、石灰石用ホッ
パー１９からドラムフィーダー２０により粉コークスと
粉石灰石の混合原料９をその凹部に装填する。Next, an example of a specific device for carrying out the above-mentioned loading is shown in FIG.
, is partially controlled by gate set 1G. This gate set 16 is a combination of a large number of gates, and is a device that enables partial control of the raw material layer thickness in the valent width direction. The width of the limestone to be charged into the area where the firing conditions are uniform is determined by the gate cellar mesh 6 in advance.
A recess is formed as shown in the figure, and then a mixed raw material 9 of coke powder and limestone powder is loaded into the recess from a limestone hopper 19 using a drum feeder 20.
次に本発明を実施例に基づいてさらに詳細に説明する。Next, the present invention will be explained in more detail based on examples.
〈実施例〉
下記の巣作でゲートセットとドラムフィーダーを用いて
焼結機パレットの最上層の凹部に原料を装填し生石灰の
製造を行った。<Example> Raw materials were loaded into the recesses of the uppermost layer of a sintering machine pallet using a gate set and a drum feeder in the following nest production to produce quicklime.
パレット幅： ３５００＋ｗ
コークス配合率： １２．５％
層厚：３０閣
装填幅： １７００＋ｗ
点火炉による石灰石表面温度： １０５０”ｃ石灰石の
粒度分布
石灰石の成分
コークスの粒度分布
ＭＳ：１．５９ｍ
他の条件は同じでパレット全幅にわたり装入した従来方
式と本発明の比較結果を第１表に示す。Pallet width: 3500+w Coke blending ratio: 12.5% Layer thickness: 30mm Loading width: 1700+w Limestone surface temperature by ignition furnace: 1050"c Particle size distribution of limestone Particle size distribution of limestone component coke MS: 1.59m Other conditions Table 1 shows the comparison results between the conventional method and the present invention, which are the same but charge the entire width of the pallet.
同表から明らかなように本発明を採用した場合、従来方
式に対し、生産面ではＣａＣ０，の分解率が５３、％か
ら７２％に上昇し、品質面では生石灰の反応性が
１０５−から
１７７ｄに向上している。As is clear from the table, when the present invention is adopted, the decomposition rate of CaC0 increases from 53% to 72% compared to the conventional method, and the reactivity of quicklime increases from 105% to 177% in terms of quality. has improved.
第１表
但し、
反応性：サンプル５０ｇを４０℃、２０００ｃｃの温水
中にて乳化し４Ｎ塩酸による中和滴定を行い５分後の４
Ｎ塩酸使用量（＊ｆｆ１）、
である。Table 1: Reactivity: Emulsify 50 g of sample in 2000 cc of warm water at 40°C, perform neutralization titration with 4N hydrochloric acid, and after 5 minutes,
The amount of N hydrochloric acid used (*ff1) is as follows.
〈発明の効果〉
焼結機パレットの最上層に粉コークスと石灰石粉を装入
し、点火炉内の熱によって石灰石の坑底を行うプロセス
につき、パレット幅方向において、加熱温度が均一な部
分に石灰石を装填し、生石灰を製造するので、生石灰の
生産性および品質を向上できる。<Effect of the invention> In the process of charging coke powder and limestone powder to the top layer of a sintering machine pallet and bottoming out the limestone using the heat in the ignition furnace, the heating temperature is uniform in the width direction of the pallet. Since quicklime is produced by loading limestone, productivity and quality of quicklime can be improved.
従って、従来方式と比較した場合、生石灰の製造におい
て大幅なコスト削減が可能となった。Therefore, when compared with the conventional method, it has become possible to significantly reduce costs in producing quicklime.
第１図は焼結機上での生石灰製造工程の説明図、第２図
はパレット幅方向における加熱温度の分布を示す測定図
、第３図はパレット幅方向における石灰石分解熱の保持
時間の分布を示す測定図、第４図は本発明を実施するた
めの具体的装置の説明図、第５図はパレット幅方向にお
ける原料装填凹部の概要図である。
１・・・パレット、 ２・・・焼結原料、３・
・・床敷鉱ホッパー ４・・・給鉱ホツパ−５・・・
粉砕機、 ６・・・クーラー７・・・篩分は
機、 ８・・・ミキサー９・・・石灰石粉＋粉コ
ークス、
ＩＯ・・・床敷鉱、 １１・・・返し鉱、１２
・・・新原料、 １３・・・製 品、１４・・
・ブロワ、 １５・・・点火装置、１６・・・
ゲートセット、 １７・・・配合原料、１８・・・ド
ラムシュート、
１９・・・石灰石用ホッパー
２０・・・ドラムフィーダー、２１・・・シュート。
特許出廟人
川崎製鉄株式会社
バレット幅方向二二おける位置
第
図
パレ、ト幅方向における位置
第
図
第
図Figure 1 is an explanatory diagram of the quicklime production process on a sintering machine, Figure 2 is a measurement diagram showing the distribution of heating temperature in the width direction of the pallet, and Figure 3 is the distribution of retention time of limestone decomposition heat in the width direction of the pallet. FIG. 4 is an explanatory diagram of a specific device for carrying out the present invention, and FIG. 5 is a schematic diagram of a raw material loading recess in the pallet width direction. 1...Pallet, 2...Sintering raw material, 3.
...Bed ore hopper 4...Ore feed hopper 5...
Crusher, 6... Cooler 7... Sieving machine, 8... Mixer 9... Limestone powder + coke powder, IO... Bed ore, 11... Return ore, 12
...New raw materials, 13...Products, 14...
・Blower, 15...Ignition device, 16...
Gate set, 17...Blended raw materials, 18...Drum chute, 19...Limestone hopper 20...Drum feeder, 21...Chute. Patent source Kawasaki Steel Co., Ltd.Bullet position in the width direction 22 Position in the width direction
Claims (1)
焼結機パレットの最上層に石灰石粉と粉コークスの混合
物を装入して点火炉内の熱によって石灰石粉から生石灰
粉を生成する際に、パレット最上層部で幅方向中央部の
ほぼ加熱温度が均一になる部分に凹部を形成し、該凹部
に該混合物を装填することを特徴とする焼結機での生石
灰の製造方法。In the sintering process using a Dwight Lloyd sintering machine,
When charging a mixture of limestone powder and coke powder to the top layer of a sintering machine pallet and generating quicklime powder from limestone powder using the heat in the ignition furnace, the heating temperature at approximately the widthwise center of the top layer of the pallet A method for producing quicklime using a sintering machine, comprising: forming a recess in a portion where the mixture is uniform; and filling the mixture into the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322587A JP3051417B2 (en) | 1989-12-14 | 1989-12-14 | Method for producing quicklime in a sintering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322587A JP3051417B2 (en) | 1989-12-14 | 1989-12-14 | Method for producing quicklime in a sintering machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03183730A true JPH03183730A (en) | 1991-08-09 |
| JP3051417B2 JP3051417B2 (en) | 2000-06-12 |
Family
ID=18145362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1322587A Expired - Fee Related JP3051417B2 (en) | 1989-12-14 | 1989-12-14 | Method for producing quicklime in a sintering machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051417B2 (en) |
-
1989
- 1989-12-14 JP JP1322587A patent/JP3051417B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3051417B2 (en) | 2000-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |