JPS5842241B2 - Slag sedative for converter - Google Patents

Slag sedative for converter

Info

Publication number
JPS5842241B2
JPS5842241B2 JP55009594A JP959480A JPS5842241B2 JP S5842241 B2 JPS5842241 B2 JP S5842241B2 JP 55009594 A JP55009594 A JP 55009594A JP 959480 A JP959480 A JP 959480A JP S5842241 B2 JPS5842241 B2 JP S5842241B2
Authority
JP
Japan
Prior art keywords
slag
converter
less
sedative
weight
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.)
Expired
Application number
JP55009594A
Other languages
Japanese (ja)
Other versions
JPS56108815A (en
Inventor
繁雄 後藤
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.)
DAIICHI NENRYO KOGYO KK
Original Assignee
DAIICHI NENRYO KOGYO KK
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 DAIICHI NENRYO KOGYO KK filed Critical DAIICHI NENRYO KOGYO KK
Priority to JP55009594A priority Critical patent/JPS5842241B2/en
Publication of JPS56108815A publication Critical patent/JPS56108815A/en
Publication of JPS5842241B2 publication Critical patent/JPS5842241B2/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/36Processes yielding slags of special composition

Description

【発明の詳細な説明】 製鋼時の転炉操業において、作業能率の向上並びに安全
操業のために、スラグ鎮静剤として、木材小片、おがく
ずの固形物あるいはこの出願人によって既に出願され特
開昭54−48623号として公開された鎮静剤、すな
わち製紙スラッジ等の短繊維類にバインダを加えて固形
物に成形したものまたは前記短繊維類に鉄鋼工業で生成
するスラグの粉砕物とバインダを加えて固形物に成形し
たものが利用されている。
DETAILED DESCRIPTION OF THE INVENTION In order to improve work efficiency and operate safely in a converter during steel manufacturing, small pieces of wood, solids of sawdust, or solid materials such as wood chips or sawdust, which have already been filed by this applicant in JP-A No. 54 The sedative disclosed in No. 48623 is made by adding a binder to short fibers such as papermaking sludge and forming it into a solid material, or by adding a binder and crushed slag produced in the steel industry to the short fibers and making it into a solid material. It is used when molded into objects.

この発明の転炉用スラグ鎮静剤は、上記した従来の鎮静
剤を改良したものであって、鎮静剤の見掛比重を犬なら
しめて転炉スラグの鎮静効果を向上させること、転炉中
の溶銑に脱硫または脱酸作用を付与できるようにするこ
と、転炉から出鋼される溶鋼自体にMn戒取分付与する
こと、及びスラグの流動性を高めることなどを目的とし
、製紙スラッジ、木材チップのダスト、木材の樹皮、砂
糖きびの絞りかす又は稲わら等のセルロースを含有する
有機物40〜90重量%に、フェロマンガス製造時に生
成されるスラグ又はマンガン鉱石の一方又は両方を粒径
10mm以下にしたMn含有率10%以上の粉粒状物1
0〜60重量%を混合し、その混合物を圧縮圧力100
kg/crtt以上で外径15mm〜100mm、含水
率30%以下の固形物に成形したことを特徴とする。
The converter slag sedating agent of the present invention is an improved version of the conventional sedating agent described above. The purpose is to impart desulfurization or deoxidation effect to hot metal, to add a proportion of Mn to the molten steel itself extracted from the converter, and to improve the fluidity of slag. 40 to 90% by weight of organic matter containing cellulose, such as chip dust, wood bark, sugarcane pomace, or rice straw, and one or both of slag and manganese ore produced during ferromangas production with a particle size of 10 mm or less. Powder 1 with a Mn content of 10% or more
0 to 60% by weight, and the mixture was compressed at 100% by weight.
kg/crtt or more, an outer diameter of 15 mm to 100 mm, and a water content of 30% or less.

主原料となるセルロースを含有する有機物としては、製
紙スラッジ、木材チップのダスト、木材の樹皮、砂糖き
びの絞りかす又は稲わら等の産業廃棄物を利用すること
が好ましく、また、前記した各種有機物はその1種を用
いてもよいが多種のものを用いてもよい。
As the organic material containing cellulose, which is the main raw material, it is preferable to use industrial waste such as paper sludge, wood chip dust, wood bark, sugar cane pomace, or rice straw. One type thereof may be used, but many types may be used.

上記の主原料が後の成形工程に支障を来たす程粗大であ
る場合は、適宜裁断ないし粉砕して用いるものである。
If the above-mentioned main raw material is so coarse that it interferes with the subsequent molding process, it should be appropriately cut or crushed before use.

その粒径は10間以下にすることが望ましい。It is desirable that the particle size is 10 mm or less.

かかる主原料40〜90重量%に対し、フェロマンガン
製造時に生成されるスラグ又はマンガン鉱石の粉粒状物
10〜60重量%を加え、それを適当な混合機で均質に
攪拌混合する。
To 40 to 90% by weight of the main raw material, 10 to 60% by weight of slag or manganese ore powder produced during ferromanganese production is added, and the mixture is stirred and mixed homogeneously using a suitable mixer.

フェロマンガンのスラグ又はマンガン鉱石は、その一方
または両者を用いることができ、混合に際しては、Mn
含有率が少くも10%以上であって、後述の成形工程で
支障を来たさぬようね径10mm以下の粉粒状物として
主原料に加える。
Either or both of ferromanganese slag and manganese ore can be used, and when mixing, Mn
It is added to the main raw material as a powder or granular material with a content of at least 10% or more and a diameter of 10 mm or less so as not to interfere with the molding process described later.

マンガン鉱石は粒径10mm以下の粗鉱を利用すること
もできるが、フェロマンガン製造におけるスラグは粉砕
してこれを使用する。
As manganese ore, crude ore with a particle size of 10 mm or less can be used, but slag in ferromanganese production is used after being crushed.

なお、フェロマンガンスラグの成分の一例を示すと第1
表のとおりである。
In addition, an example of the components of ferromanganese slag is No. 1.
As shown in the table.

上記のようにして得られた混合物は適当な成形装置によ
って圧縮圧力100kg/ca以上で加圧成形し、大き
さく最長部の長さ)15山〜100mm、含水率30%
以下の固形体として製品の鎮静剤に形成される。
The mixture obtained as above is pressure-molded using an appropriate molding device at a compression pressure of 100 kg/ca or more, and the size (length of the longest part) is 15 to 100 mm, and the water content is 30%.
Formed into the product sedative as a solid body.

製品固形体の形状は、球形、短円柱形、豆炭形など任意
である。
The shape of the solid product may be arbitrary, such as a sphere, a short cylinder, or a charcoal shape.

前記混合物には特にバインダを加えなくても高圧縮力に
よって塊状に固められるが、必要に応じ上記混合工程に
おいてオレフィン類重合物その他のバインダを加えても
よいことは勿論である。
Although the mixture can be solidified into a lump by high compression force without adding any binder, it is of course possible to add an olefin polymer or other binder in the mixing step, if necessary.

混合物の加圧成形圧力を100kg/c4以上にした理
由は、固形体とされた鎮静剤が輸送される場合などに崩
壊するのを防ぐためである。
The reason why the compression molding pressure of the mixture is set to 100 kg/c4 or more is to prevent the solid sedative from collapsing when being transported.

また、上述の混合原料中の含水率が高すぎると、圧縮圧
力100 kg/cn1以上での成形が困難になるので
、玲※成形前に予備処理として物理的あるいは化学的に
脱水を行いその含水率を30%以下程度にすることを要
する。
In addition, if the water content in the above-mentioned mixed raw materials is too high, it will be difficult to mold at a compression pressure of 100 kg/cn1 or more, so it is necessary to dehydrate physically or chemically as a preliminary treatment before molding. It is necessary to keep the ratio to about 30% or less.

含水率が高すぎる場合は成形した固形体の強度が劣り、
その固形体、すなわち鎮静剤が使用前の運搬や貯蔵時に
崩壊することになり好ましくない。
If the moisture content is too high, the strength of the molded solid body will be poor;
The solid form, ie, the sedative, disintegrates during transportation and storage prior to use, which is undesirable.

また、製品鎮静剤の含水率を30%以下に押えた別の理
由は、製鋼工程で使用される生石灰、焼成ドロマイト等
と鎮静剤とがホッパ、コンベヤその他の輸送設備や貯蔵
設備において接触した際に生じ得る発熱反応による着火
トラブルを防止するためである。
Another reason for keeping the moisture content of the product sedative below 30% is that the sedative comes into contact with quicklime, calcined dolomite, etc. used in the steelmaking process in hoppers, conveyors, and other transportation and storage equipment. This is to prevent ignition troubles due to exothermic reactions that may occur.

この発明の鎮静剤が生石灰と接触した場合でも着火トラ
ブルを起さないことは、第2表に示す実験結果によって
も確認された。
It was also confirmed by the experimental results shown in Table 2 that the sedative of this invention does not cause any ignition trouble even when it comes into contact with quicklime.

上記のようにして製造されたこの発明の鎮静剤は、セル
ロースを含有する有機物に加えられたフェロマンガンス
ラグ又はマンガン鉱石の粉粒状物の見掛比重が比較的大
きい(フェロマンガンスラグを10mm以下に粉砕した
ものの見掛比重は約1.8である)ため、これを沸騰す
る転炉表面のスラグに投入すると、スラグの泡中に沈下
してその泡立ちを急速に鎮め溶鋼の飛散を防ぐ一方で、
セルロース類の燃焼により高温を保持する。
The sedative of the present invention produced as described above has a relatively large apparent specific gravity of the ferromanganese slag or manganese ore powder added to the cellulose-containing organic material (the ferromanganese slag is reduced to 10 mm or less). The apparent specific gravity of the crushed material is approximately 1.8), so when it is poured into the slag on the surface of the boiling converter, it sinks into the foam of the slag, rapidly suppressing the foaming and preventing the molten steel from scattering. ,
Maintains high temperature by burning cellulose.

そして、鎮静剤に含有するMnは、溶銑中に拡散し脱硫
または脱酸作用を呈すると共に、転炉スラグの流動性を
高める役割を果し、また、転炉から出鋼される溶鋼自体
にMn成分として残留するものである。
The Mn contained in the sedative diffuses into the hot metal and exhibits a desulfurization or deoxidizing effect, and also plays a role in increasing the fluidity of the converter slag. It remains as a component.

以上のようにこの発明の鎮静剤は、製鋼時における転炉
の生産性を高めると共に鋼の成分としてMnの付与も可
能であり、製紙スラッジ、木材チップのダスト類あるい
はフェロマンガンスラグなど産業廃棄物の有効処理もま
た併せて行い得るなどの効果を奏する。
As described above, the sedative of this invention can improve the productivity of the converter during steel manufacturing, and can also add Mn as a component of steel, and can be used to treat industrial waste such as papermaking sludge, wood chip dust, or ferromanganese slag. Effective processing can also be performed at the same time.

Claims (1)

【特許請求の範囲】[Claims] 1 製紙スラッジ、木材チップのダスト、木材の樹皮、
砂糖きびの絞りかす又は稲わら等のセルロースを含有す
る有機物40〜90重量%に、フェロマンガン製造時に
生成されるスラグ、マンガン鉱石の一方又は両者な粒径
10m7IL以下にしたMn含有率10%以上の粉粒状
物10〜60重量%を混合し、その混合物を圧縮圧力1
00 kg/crA以上で大きさ15闘〜100mm、
含水率30%以下の固形体に成形して成る転炉用スラグ
鎮静剤。
1 Paper sludge, wood chip dust, wood bark,
40 to 90% by weight of organic matter containing cellulose, such as sugar cane residue or rice straw, and one or both of slag and manganese ore produced during ferromanganese production with a Mn content of 10% or more with a particle size of 10m7IL or less. Mix 10 to 60% by weight of powder and granules, and compress the mixture under a compression pressure of 1
00 kg/crA or more, size 15 to 100 mm,
A slag suppressant for converter furnaces formed into a solid body with a moisture content of 30% or less.
JP55009594A 1980-01-30 1980-01-30 Slag sedative for converter Expired JPS5842241B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55009594A JPS5842241B2 (en) 1980-01-30 1980-01-30 Slag sedative for converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55009594A JPS5842241B2 (en) 1980-01-30 1980-01-30 Slag sedative for converter

Publications (2)

Publication Number Publication Date
JPS56108815A JPS56108815A (en) 1981-08-28
JPS5842241B2 true JPS5842241B2 (en) 1983-09-19

Family

ID=11724647

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55009594A Expired JPS5842241B2 (en) 1980-01-30 1980-01-30 Slag sedative for converter

Country Status (1)

Country Link
JP (1) JPS5842241B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115466821B (en) * 2022-08-25 2023-09-08 福建三宝钢铁有限公司 Free-cutting steel 20MnV6S electric furnace smelting process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465113A (en) * 1977-11-02 1979-05-25 Kobe Steel Ltd Foaming phenomenon killing agent for steel slag
JPS54107820A (en) * 1978-02-13 1979-08-24 Yamada Ind Production of foaming suppressor for use in converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465113A (en) * 1977-11-02 1979-05-25 Kobe Steel Ltd Foaming phenomenon killing agent for steel slag
JPS54107820A (en) * 1978-02-13 1979-08-24 Yamada Ind Production of foaming suppressor for use in converter

Also Published As

Publication number Publication date
JPS56108815A (en) 1981-08-28

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