JPH0310024A - Method for molding ore briquette - Google Patents
Method for molding ore briquetteInfo
- Publication number
- JPH0310024A JPH0310024A JP14289189A JP14289189A JPH0310024A JP H0310024 A JPH0310024 A JP H0310024A JP 14289189 A JP14289189 A JP 14289189A JP 14289189 A JP14289189 A JP 14289189A JP H0310024 A JPH0310024 A JP H0310024A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- roll
- briquettes
- forming
- molding
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 238000000465 moulding Methods 0.000 title abstract description 8
- 239000004484 Briquette Substances 0.000 title description 13
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 235000019738 Limestone Nutrition 0.000 claims abstract description 4
- 239000006028 limestone Substances 0.000 claims abstract description 4
- 239000003245 coal Substances 0.000 claims abstract description 3
- 239000004927 clay Substances 0.000 claims description 3
- 229910000480 nickel oxide Inorganic materials 0.000 abstract description 4
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 3
- 230000007812 deficiency Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- FMQXRRZIHURSLR-UHFFFAOYSA-N dioxido(oxo)silane;nickel(2+) Chemical compound [Ni+2].[O-][Si]([O-])=O FMQXRRZIHURSLR-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002344 surface layer Substances 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、鉱石ブリケットの成形方法に関し、とくに粘
土質な酸化ニッケル鉱石や酸化クロム鉱石、酸化マンガ
ン鉱石などのブリケットを高歩留りで製造するための、
ブリケットマシンの運転方法に特徴をもつ、ブリケット
成形技術に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for forming ore briquettes, particularly for producing briquettes of clayey nickel oxide ore, chromium oxide ore, manganese oxide ore, etc. at a high yield. of,
This relates to briquette forming technology, which is characterized by the operating method of the briquette machine.
以下の説明は、主として粘土質酸化ニッケル鉱石の例で
説明する。The following description will mainly be made using clayey nickel oxide ore as an example.
ニッケル鉱石の製錬、とくにガーニライトの如き粘土質
の珪酸ニッケル鉱石からフェロニッケルなどを乾式製錬
する場合、一般に原鉱石を乾式、湿式、半乾式処理して
ケーク状とし、水分調整をした後ブリケットマシンに装
入し、ここでビロー型やアーモンド型の団!(ブリケッ
ト)として成形している。When smelting nickel ore, especially pyro-smelting ferronickel from clayey nickel silicate ore such as garnilite, the raw ore is generally dry-, wet-, or semi-dry-processed to form a cake, and the moisture content is adjusted before briquetting. Load it into the machine and get a billow-shaped or almond-shaped group! (briquettes).
従来、上述の如きブリケットを製造する方法としては、
バインダー(ピッチ、水硝子、ベントナイト、各種廃油
、廃液、 etc、)を使うものが一般的であるが、バ
インダーコストがかかること、鉱石処理量が減少するこ
と、有害成分が混入すること、強度を発揮するまでに時
間がかかること、および乾燥のためのコストがかかる、
といったような問題点があった。Conventionally, as a method for manufacturing the above-mentioned briquettes,
Generally, binders (pitch, water glass, bentonite, various waste oils, waste liquids, etc.) are used, but binder costs are high, the amount of ore processed decreases, harmful components are mixed in, and strength is reduced. It takes a long time to develop and the cost of drying is high.
There were such problems.
これに対し、ニッケル鉱石のもつ粘土分を利用すること
でバインダーを使わずに鉱石を物理化学的に結合させる
方法が、特開昭62−23944号公報に開示されてい
る。On the other hand, Japanese Patent Laid-Open No. 62-23944 discloses a method of physically and chemically bonding ores without using a binder by utilizing the clay content of nickel ores.
しかし、上記従来技術は、成形ブリケットの強度(圧潰
強度)が常に15kgを超えるようなものを安定して製
造することが難しく、例えばブリケットにラミネーショ
ンが多く発生して著しく成形歩留りの低下を招いたり、
成形ロールへの原料粉の付着(居着き)を発生すること
により、設備の運転停止を余儀無くすることによる生産
効率の低下、などといった各種のトラブルが多く発生す
るといった課題が残されていた。However, with the above-mentioned conventional technology, it is difficult to stably produce molded briquettes whose strength (crushing strength) always exceeds 15 kg. ,
Problems still remain, such as raw material powder adhering to the forming rolls, which causes various problems such as a decline in production efficiency due to the forced shutdown of equipment.
本発明の目的は、上述のような従来技術の問題点を克服
し、焼成に適した強固なブリケットを高い歩留りの下で
安価に製造するための、ブリケットマシンの運転に着目
したブリケットの成形方法を提案せんとするところにあ
る。The purpose of the present invention is to overcome the problems of the prior art as described above, and to produce a briquette forming method that focuses on the operation of a briquette machine, in order to produce strong briquettes suitable for firing at a high yield at a low cost. This is what I am trying to propose.
1掲の目的に対し、本発明は、粘土質ニッケル鉱石粉と
粉炭ならびに石灰石粉などの副原料との混合原料を、胴
周面に多数の成形穴型を有する一対の成形ロールからな
るブリケントマシンのロールクリアランス部に供給し、
その対面する一対の前記成形穴型内に充填された前記混
合原料を、成形ロールの回転に伴う加圧力によって成形
する方法において、
前記ブリケットマシンのゲート開度を50〜150mm
、前記ロールクリアランスを1〜4mm、ロール加圧力
を80〜150 Kg/cm”の範囲内に制御して運転
することを特徴とする鉱石ブリケットの成形方法、を、
上述した課題を解決するための手段として提案する。In order to achieve the above object, the present invention processes a mixed raw material of clayey nickel ore powder and auxiliary raw materials such as pulverized coal and limestone powder into a briquent roller consisting of a pair of forming rolls having a large number of forming holes on the circumferential surface of the body. Supplied to the roll clearance section of the machine,
In the method of forming the mixed raw material filled in the pair of facing forming hole molds by applying pressure accompanying rotation of forming rolls, the gate opening degree of the briquetting machine is set to 50 to 150 mm.
, a method for forming ore briquettes, characterized in that the operation is carried out by controlling the roll clearance within the range of 1 to 4 mm and the roll pressing force within the range of 80 to 150 Kg/cm",
This is proposed as a means to solve the above-mentioned problems.
焼成に適したブリケットを成形するのに好適なブリケッ
トマシンの運転条件において、上述の各条件について説
明する。The above-mentioned operating conditions of the briquette machine suitable for forming briquettes suitable for firing will be explained.
(a) ゲート開度
これは、成形ロール上へ供給する混合湿原料粉の供給量
をコントロールするために調整するもので、ブリケット
成形上極めて重要な操作条件である。すなわち、ゲート
開度を50鶴よりも小さくして原料供給不足が生じると
ロールの圧縮力は弱まり、第2図に示すような原料のロ
ールへの居着き〔ポケット内層着き・・・(a)、全面
層着き・・・(b)〕が生じ易くなり、いわゆる成形不
十分となる。一方、このゲート開度を150鳳■超にす
ると供給過多になり、ブリケットはラミネーションすな
わち真中にクラックを発生し、真二つに割れるようにな
る。(a) Gate opening degree This is adjusted to control the amount of mixed wet raw material powder fed onto the forming rolls, and is an extremely important operating condition in briquette forming. In other words, if the gate opening is made smaller than 50 mm and a raw material supply shortage occurs, the compressive force of the roll will weaken, and the raw material will settle on the roll as shown in Figure 2 [Pocket inner layer... (a), Full-surface layer adhesion...(b)] tends to occur, resulting in so-called insufficient molding. On the other hand, if the opening degree of the gate is increased to more than 150 mm, the briquettes will be oversupplied, and the briquettes will be laminated, that is, a crack will occur in the middle, and the briquettes will break into two.
また、このゲート開度は、混合原料の水分にも大きく影
響され、例えば原料粉の水分が高いほど原料の流れは悪
くなるため、ゲート開度を十分大きくしないと成形不十
分か、たとえブリケットの成形はできても強度の極めて
弱いものとなる。このような場合は原料の予備圧縮ある
いはスクリュー等による強制供給も有効である。In addition, this gate opening degree is greatly influenced by the moisture content of the mixed raw materials. For example, the higher the moisture content of the raw material powder, the worse the flow of the raw material. Even if it can be molded, the strength will be extremely weak. In such cases, preliminary compression of the raw material or forced feeding using a screw or the like is also effective.
以上まとめると、第1図に示すところから明らかなよう
に、本発明において好ましいゲート開度は、50〜15
0 wの範囲内に制御することが所期のブリケットを成
形する上で必要である。In summary, as shown in FIG. 1, the preferred gate opening degree in the present invention is 50 to 15
It is necessary to control it within the range of 0 w in order to form the desired briquettes.
(b) ロールクリアランス
ブリケットマシンの成形ロール間で形成されるロールク
リアランスはそれが小さいほど成形ロールの圧縮力が強
くなり、ブリケットの独立性は向上(個々に分離し易く
なること)するが、ラミネーションを起こし易い。その
下限はl鶴程度である。一方、このロールクリアランス
が、例えば411を超えて大きくなると、ブリケットは
独立性が悪くなって連団鉱になり易い。この場合、ゲー
ト開度を開けて供給量を増やしてやらないと、原料供給
不足を生じ、かつ居着き、成形不良の原因となる。特に
、低水分の原料粉はロールの食い込み角度が小さいため
、粉発生の原因となり易い。(b) Roll Clearance The smaller the roll clearance formed between the forming rolls of a briquette machine, the stronger the compressive force of the forming rolls, which improves the independence of the briquettes (easier to separate them), but the lamination It is easy to cause The lower limit is about 1 crane. On the other hand, if this roll clearance becomes large, for example exceeding 411, the independence of the briquettes becomes poor and the briquettes are likely to form a block. In this case, unless the gate opening is increased to increase the supply amount, there will be a shortage of raw material supply and the raw material will settle, causing molding defects. In particular, low-moisture raw material flour is likely to cause powder generation because the roll bite angle is small.
以上まとめると、本発明において好ましいロールクリア
ランスとしては、第1図に示すところから明らかなよう
に、1〜41重の範囲内に制御することが所期のブリケ
ットを成形する上で必要である。In summary, in the present invention, it is necessary to control the preferable roll clearance within the range of 1 to 41 folds, as shown in FIG. 1, in order to form the desired briquettes.
(C) ロール加圧力
成形ロール間のロール加圧力は、80 Kg/cm”を
下まわるような余りに小さい値だと成形ロールの圧縮力
が弱くなり、ブリケットは連団鉱となり易く、しかも弱
くなる。しかし、逆に150にg7cm”を超えるよう
な余りに大きな圧力でも原料の食い込みが悪くなり、強
固なブリケットは得られにくい。原料食い込みにより、
かすかにロールが開く程度の圧力とすべきである。その
好ましいロール加圧力としては、80〜150Kg/c
m”の範囲内に制御することが所期のブリケットを成形
する上で必要である。(C) Roll pressure If the roll pressure between the forming rolls is too small, such as less than 80 Kg/cm, the compression force of the forming rolls will be weak, and the briquettes will tend to form coalescence and become weaker. However, if the pressure is too high, such as exceeding 150 g/7 cm, the raw material will not penetrate easily, making it difficult to obtain strong briquettes. Due to raw material penetration,
The pressure should be just enough to slightly open the roll. The preferable roll pressure is 80 to 150 kg/c.
It is necessary to control the temperature within the range of m'' in order to form the desired briquettes.
なお、本発明においては、特に限定しないが、ブリケッ
トの成形に当たっては、ロール回転速度なども重要であ
る。すなわら、一般に原料はゆっくり加熱する方が、ブ
リケット成形1好ましいと言える。しかし、マシンの効
率を挙げるためには、回転速度を上げざるを得ないが、
この場合の問題点は原料供給量で、供給さえ十分に行え
れば、ロールの回転速度は余り問題とはならない。この
ことを考慮し、該ロール回転速度は他の操作条件との関
連で、好ましい範囲に制御することが所期のブリケット
を成形する上で必要である。In the present invention, although not particularly limited, roll rotation speed is also important in forming briquettes. In other words, it can be said that it is generally preferable for briquette forming 1 to slowly heat the raw materials. However, in order to increase the efficiency of the machine, it is necessary to increase the rotation speed,
The problem in this case is the amount of raw material supplied, and as long as the supply is sufficient, the rotational speed of the rolls does not matter much. Taking this into consideration, it is necessary to control the roll rotation speed within a preferable range in relation to other operating conditions in order to form the desired briquettes.
酸化ニッケル鉱石(水分: 27.9%、 Ni :
2.32%。Nickel oxide ore (moisture: 27.9%, Ni:
2.32%.
Sing : 46.48%、 FeO: 11.73
%、 MgO: 21.25%、粘土骨=65%)を
主原料とし、これに復原料として炭材を外枠量で10〜
15%、石灰石粉を6〜10%、その他戻りダスト10
〜20%を加えた団鉱原料(水分=16〜18%)を調
整した。この原料を第1表に示す運転条件でブリケット
マシンを運転し、成形ブリケットの特性について観察し
た。Sing: 46.48%, FeO: 11.73
%, MgO: 21.25%, clay bone = 65%) as the main raw material, and carbon material as a recycled material in an outer frame amount of 10 ~
15%, limestone powder 6-10%, other return dust 10
A briquette raw material (moisture = 16-18%) with ~20% added was prepared. A briquette machine was operated using this raw material under the operating conditions shown in Table 1, and the properties of the formed briquettes were observed.
上記第1表より明らかなように、本発明の運転条件を外
れる比較例11m5〜6はいずれも成形不良かブリケッ
ト強度の小さいものしか得られないのに対し、本発明性
実施例ではいずれも強度の優れたブリケットを高歩留り
で製造できた。As is clear from Table 1 above, in Comparative Examples 11m5 to 11m5, which differ from the operating conditions of the present invention, all of them resulted in poor molding or only low briquette strength, whereas in the inventive Examples, all We were able to produce excellent briquettes at a high yield.
以上説明したように本発明によれば、強度高く成形性に
優れるブリケットを高歩留りで確実に製造することがで
きる。As explained above, according to the present invention, briquettes with high strength and excellent formability can be reliably manufactured at a high yield.
第1図は、本発明方法を説明するためのブリケットマシ
ンの運転条件の好適範囲を説明するグラフ、
第2図(a)、 (blは、成形ロールへの居着きの状
態を説明する説明図である。Fig. 1 is a graph explaining the preferred range of operating conditions of the briquette machine to explain the method of the present invention; be.
Claims (1)
との混合原料を、胴周面に多数の成形穴型を有する一対
の成形ロールからなるブリケットマシンのロールクリア
ランス部に供給し、その対面する一対の前記成形穴型内
に充填された前記混合原料を、成形ロールの回転に伴う
加圧力によって成形する方法において、 前記ブリケットマシンのゲート開度を50〜150mm
、前記ロールクリアランスを1〜4mm、ロール加圧力
を80〜150Kg/cm^2の範囲内に制御して運転
することを特徴とする鉱石ブリケットの成形方法。[Claims] 1. A mixed raw material of clay ore powder and auxiliary raw materials such as pulverized coal and limestone powder is processed into a roll clearance section of a briquetting machine consisting of a pair of forming rolls having a large number of forming holes on the circumferential surface of the body. A method of forming the mixed raw material filled into a pair of facing forming hole molds by pressurizing force accompanying rotation of forming rolls, wherein the gate opening degree of the briquetting machine is set to 50 to 150 mm.
A method for forming ore briquettes, characterized in that the operation is carried out by controlling the roll clearance within the range of 1 to 4 mm and the roll pressing force within the range of 80 to 150 kg/cm^2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14289189A JPH0310024A (en) | 1989-06-07 | 1989-06-07 | Method for molding ore briquette |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14289189A JPH0310024A (en) | 1989-06-07 | 1989-06-07 | Method for molding ore briquette |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0310024A true JPH0310024A (en) | 1991-01-17 |
Family
ID=15325998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14289189A Pending JPH0310024A (en) | 1989-06-07 | 1989-06-07 | Method for molding ore briquette |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0310024A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002105548A (en) * | 2000-09-27 | 2002-04-10 | Nippon Mining & Metals Co Ltd | Method for treating copper concentrate by solidification, and solidified material of copper concentrate |
JP2004536968A (en) * | 2001-08-02 | 2004-12-09 | コモンウェルス サイエンティフィック アンド インダストリアル リサーチ オーガニゼーション | Briquetting iron ore |
WO2009037943A1 (en) * | 2007-09-18 | 2009-03-26 | Kabushiki Kaisha Kobe Seiko Sho | Method for producing briquette with carbonaceous material incorporated therein by use of oil-containing iron-making plant dust |
JP2015168849A (en) * | 2014-03-06 | 2015-09-28 | 株式会社日向製錬所 | Method for manufacturing briquette |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6130634A (en) * | 1984-07-23 | 1986-02-12 | Daiichi Nenryo Kogyo Kk | Forming additive containing chromium for steel making and manufacture thereof |
-
1989
- 1989-06-07 JP JP14289189A patent/JPH0310024A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6130634A (en) * | 1984-07-23 | 1986-02-12 | Daiichi Nenryo Kogyo Kk | Forming additive containing chromium for steel making and manufacture thereof |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002105548A (en) * | 2000-09-27 | 2002-04-10 | Nippon Mining & Metals Co Ltd | Method for treating copper concentrate by solidification, and solidified material of copper concentrate |
JP2004536968A (en) * | 2001-08-02 | 2004-12-09 | コモンウェルス サイエンティフィック アンド インダストリアル リサーチ オーガニゼーション | Briquetting iron ore |
JP2004536969A (en) * | 2001-08-02 | 2004-12-09 | コモンウェルス サイエンティフィック アンド インダストリアル リサーチ オーガニゼーション | Briquetting iron ore |
WO2009037943A1 (en) * | 2007-09-18 | 2009-03-26 | Kabushiki Kaisha Kobe Seiko Sho | Method for producing briquette with carbonaceous material incorporated therein by use of oil-containing iron-making plant dust |
JP2009074105A (en) * | 2007-09-18 | 2009-04-09 | Kobe Steel Ltd | Method for manufacturing carbonaceous-material-containing briquette by using oil-containing dust in ironworks |
AU2008301824B2 (en) * | 2007-09-18 | 2011-03-03 | Kabushiki Kaisha Kobe Seiko Sho | Method for producing briquette with carbonaceous material incorporated therein by use of oil-containing iron-making plant dust |
US8439987B2 (en) | 2007-09-18 | 2013-05-14 | Kobe Steel, Ltd. | Method of producing carbonaceous material-containing briquettes using steel mill dust containing oil |
JP2015168849A (en) * | 2014-03-06 | 2015-09-28 | 株式会社日向製錬所 | Method for manufacturing briquette |
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