JPH0310024A - Method for molding ore briquette - Google Patents

Method for molding ore briquette

Info

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
Application number
JP14289189A
Other languages
Japanese (ja)
Inventor
Toyomi Matsumori
松森 豊己
Keishirou Narita
成田 佳四郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Yakin Kogyo Co Ltd
Original Assignee
Nippon Yakin Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Yakin Kogyo Co Ltd filed Critical Nippon Yakin Kogyo Co Ltd
Priority to JP14289189A priority Critical patent/JPH0310024A/en
Publication of JPH0310024A publication Critical patent/JPH0310024A/en
Pending legal-status Critical Current

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  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE:To surely obtain briquettes having high strength and excellent moldability at a high yield by respectively controlling the gate opening degree, roll gap and roll pressing force of a briquetting machine consisting of a pair of molding rolls at the time of supplying a raw material mixture composed of clayey ore powder and auxiliary raw materials to the above-mentioned machine. CONSTITUTION:The raw material mixture composed of the clayey ore powder of nickel oxide, etc., and powder coal as well as limestone powder, etc., is supplied to the roll clearance part of the above mentioned briquetting machine having many molding calibers on the cylindrical peripheral surfaces. This raw material mixture is molded by the pressing force generated by the rotation of the molding rolls. The gate opening degree of the above-mentioned briquetting machine is adjusted to 50 to 150mm to prevent the stagnation of the raw materials on the rolls and the stagnation thereof over the entire surface and the generation of cracks. The roll clearance is controlled to 1 to 5mm to prevent the deficiency of supply, stagnation and molding defect of the raw materials. The strong briquettes are obtd. by further controlling the roll pressing force to 80 to 150kg/cm<2>.

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.

〔従来の技術〕[Conventional technology]

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.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

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.

〔課題を解決するための手段〕[Means to solve the problem]

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.

〔作 用〕[For production]

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.

〔実施例〕〔Example〕

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.

〔発明の効果〕〔Effect of the invention〕

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.

【図面の簡単な説明】[Brief explanation of drawings]

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)

【特許請求の範囲】 1、粘土質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.
JP14289189A 1989-06-07 1989-06-07 Method for molding ore briquette Pending JPH0310024A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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