JPS60224721A - Manufacture of crude zinc oxide briquette - Google Patents
Manufacture of crude zinc oxide briquetteInfo
- Publication number
- JPS60224721A JPS60224721A JP7858484A JP7858484A JPS60224721A JP S60224721 A JPS60224721 A JP S60224721A JP 7858484 A JP7858484 A JP 7858484A JP 7858484 A JP7858484 A JP 7858484A JP S60224721 A JPS60224721 A JP S60224721A
- Authority
- JP
- Japan
- Prior art keywords
- zinc oxide
- crude zinc
- briquette
- weight
- rotary kiln
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は亜鉛製錬の溶鉱炉又は蒸留炉等に装入する粗酸
化亜鉛団鉱の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing crude zinc oxide briquette to be charged into a blast furnace or distillation furnace for zinc smelting.
亜鉛の乾式製錬においては、粉状の鉱石、亜鉛滓、酸化
亜鉛等の原料は、造粒、製団等の予備処理を行って団塊
化したうえで溶鉱炉又は蒸留炉等に装入するのが一般的
である。この場合得られた団鉱等が割れや粉化を起さな
い強度を有することが溶鉱炉等の操業のために重要であ
るが、従来性なわれている製団方法として音源もしく
ｕ ２００〜３００℃の比較的低温で加圧成形する方法
があるが、この方法はパルプ廃液、ベントナイト、コー
ルタール等のバインダーを添加することが必要であり、
しかもこのようにバインダーを添加しても十分な強度が
得られないという欠点があるとともｒこ、これらのバイ
ンダーは一般に高価であって経済的でないという欠点も
あった。また、鉄鋼ターストや含亜鉛製錬中間物から揮
発回収された粉状の粗酸化亜鉛を団鉱にする方法として
、バインダーを使用することなく５００〜６００℃の高
温度に加熱して原料に可塑性をもたせた状態で加圧成形
する方法も行なわれているが、この方法にあっても製団
前の原料の嵩比重が０．５〜１．０と小さく１回団鉱機
を通しただけでは圧密不足、強度不足を呈するため、予
備圧縮を行って見掛比重が２程度のフレーク伏に圧密し
友後再度加圧成形するという２段階製団を行う必要があ
って手間がかかり、設備も複雑になるので経済的に不利
であるという欠点があった。In zinc pyrometallurgy, raw materials such as powdered ore, zinc slag, and zinc oxide are subjected to preliminary treatments such as granulation and agglomeration to form agglomerates, and then charged into a blast furnace or distillation furnace. is common. In this case, it is important for the operation of blast furnaces etc. that the obtained briquette etc. have the strength to prevent cracking or pulverization.
There is a method of pressure molding at a relatively low temperature of 200 to 300°C, but this method requires the addition of a binder such as pulp waste liquid, bentonite, or coal tar.
Moreover, there is a drawback that sufficient strength cannot be obtained even with the addition of a binder in this way, and there is also a drawback that these binders are generally expensive and uneconomical. In addition, as a method for turning powdered crude zinc oxide volatilized and recovered from iron and steel cast and zinc-containing smelting intermediates into briquettes, the raw material is heated to a high temperature of 500 to 600°C without using a binder to make the raw material plastic. There is also a method of press-molding the raw material in a state where it has a briquette, but even with this method, the bulk specific gravity of the raw material before making the briquette is small, 0.5 to 1.0, and is only passed through the briquette once. However, because of the lack of compaction and strength, it is necessary to carry out a two-step process of pre-compressing to form flakes with an apparent specific gravity of about 2, and then press-forming again after forming, which is time-consuming and requires a lot of equipment. It also has the disadvantage that it is economically disadvantageous because it becomes complicated.
本発明は上記のような従来の団鉱の製造方法の欠点を解
消し、安価な添加材を使用して１段階の製団で亜鉛溶鉱
炉等に装入するのに適した強度の高い粗酸化亜鉛団鉱を
製造できる方法を提供することを目的とする。The present invention solves the drawbacks of the conventional briquette manufacturing method as described above, and produces a coarse oxide briquette with high strength suitable for charging into zinc blast furnaces etc. in one step using inexpensive additives. The purpose of the present invention is to provide a method for producing zinc briquettes.
この目的を達成するために本発明は、５０重量−以下の
水分を含有する粗酸化亜鉛ケークに、粒径ｌ〜５瓢の非
鉄製錬水砕スラグを乾量基準の粗酸化亜鉛１００００重
量対して５〜２０重量部添加し、ロータリーキルンで５
００〜１０００℃の温度にて乾燥加熱した後、双輪式団
鉱機に供給して、温度５００℃以上、ロール圧力１７０
１５ｍ以上で１段で団鉱に成形することを特徴とする粗
酸化亜鉛団鉱の製造方法を提供する。In order to achieve this object, the present invention adds nonferrous smelting granulated slag with a grain size of 1 to 5 gourds per 10,000 weight of crude zinc oxide on a dry weight basis to a crude zinc oxide cake containing water of 50% by weight or less. Add 5 to 20 parts by weight and heat in a rotary kiln for 5 to 20 parts by weight.
After drying and heating at a temperature of 00 to 1000°C, it is fed to a twin-wheel briquette machine and heated at a temperature of 500°C or higher and a roll pressure of 170°C.
To provide a method for producing a crude zinc oxide briquette, which is characterized in that it is formed into a briquette in one stage over a length of 15 m or more.
本発明にあっては先ず、鉄鋼ダスト等の含亜鉛原料から
揮発回収された粗酸化亜鉛ダストを湿式処理して塩素等
のハロゲンを除去して得られた水分を５０重量％以下含
有する粗酸化亜鉛ケークに、鉛・亜鉛製錬水砕スラグや
銅製錬水砕スラグ等の非鉄製錬水砕スラグを添加する。In the present invention, first, crude zinc oxide dust containing 50% by weight or less of water is obtained by wet-processing crude zinc oxide dust recovered by volatilization from zinc-containing raw materials such as steel dust to remove halogens such as chlorine. Nonferrous smelting granulated slag, such as lead/zinc smelting granulated slag or copper smelting granulated slag, is added to the zinc cake.
この理由は、次の乾燥加熱を行うロータリーキルンの炉
内において、添加した水砕スラグが核となって粗酸化亜
鉛粉末を造粒する作用を発揮し原料の嵩比重を高める効
果があり、また後段の製団工程で粗酸化亜鉛中に分散し
た水砕スラグによって団鉱中に発生するクラックの成長
を防止する効果があることによる。The reason for this is that in the rotary kiln that performs the next drying and heating process, the added granulated slag acts as a core to granulate the crude zinc oxide powder, increasing the bulk specific gravity of the raw material. This is because the granulated slag dispersed in the crude zinc oxide during the briquetting process has the effect of preventing the growth of cracks that occur in the briquette.
水砕スラグの粒径を１〜５ｍとしたのは、この範囲の粒
径のものが上記の造粒作用やクラック成長防止に有効で
あるとともに、実操業の非鉄製錬炉から産出する水砕ス
ラグの粒径が略この範囲ＶＣ，あり、そのまま使用でき
る利点があることによる。The particle size of the granulated slag is set to 1 to 5 m because the particle size in this range is effective for the above-mentioned granulation effect and prevention of crack growth. This is because the particle size of the slag is approximately within this range VC, and there is an advantage that it can be used as is.
また水砕スラグの添加量は、粗酸化亜鉛ケークの水分を
除外した乾量基準の粗酸化亜鉛１００重量部に対して５
〜２０重量部とする。この理由は添加量が５重量部未満
では製造された団鉱の強度を増す効果が十分でなく、ま
た加重置部を越えて添加しても団鉱強度を増す効果はあ
まり増大せず、しかも団鉱の亜鉛含有量を低下させる結
果となるので亜鉛製錬の原料としては経済的に不利とな
るからである。In addition, the amount of granulated slag added is 5 parts by weight per 100 parts by weight of crude zinc oxide on a dry basis excluding water from the crude zinc oxide cake.
~20 parts by weight. The reason for this is that if the amount added is less than 5 parts by weight, the effect of increasing the strength of the produced briquette is not sufficient, and even if it is added in excess of the weight placement part, the effect of increasing the strength of the briquette will not increase much. Moreover, it results in a decrease in the zinc content of the briquette, making it economically disadvantageous as a raw material for zinc smelting.
ロータリーキルンでの加熱温度は、後段の製団工程で団
鉱機に供給する原料の温度は可塑性を生ずる５００℃以
上が必要であり、それより低温では十分な団鉱強度が得
られないので、少くとも５００℃以上必要であり、ロー
タリーキルンから団鉱機までの搬送工程が比較的長い場
合はより高温に加熱する必要があるが、特に１０００℃
を越えて加熱する必要はなく、好ましい加熱温度の範囲
は５００〜１０００℃の範囲である。捷だ団鉱機のロー
ル圧力は１７０１５ｄ以上が必要であり、それ以下では
団鉱の強度が低下する。The heating temperature in the rotary kiln is that the temperature of the raw material fed to the briquette machine in the later briquetting process needs to be at least 500°C to produce plasticity, and at lower temperatures, sufficient briquette strength cannot be obtained, so the heating temperature should be kept low. If the conveyance process from the rotary kiln to the briquette machine is relatively long, it is necessary to heat it to a higher temperature, especially 1000°C.
There is no need to heat above 500°C to 1000°C, and the preferred heating temperature range is 500 to 1000°C. The roll pressure of the briquette briquette machine must be 17015 d or more, and if it is less than that, the strength of the briquette will decrease.
以上に詳１ＶＩＩＩニ説明した本発明の粗酸化亜鉛団鉱
の製造方法によれば、安価な添加材を使用して、１段階
の製団で亜鉛溶鉱炉等に装入するのＩｃ ｉ４ Ｌだ強
度の高い粗酸化亜鉛団鉱を製造することができて経済的
であり、設備も簡略化できるという大きな効果がある。According to the method for producing crude zinc oxide briquette of the present invention, which has been explained in detail in 1VIII above, the strength of Ic i4 L can be achieved by using inexpensive additives and charging a zinc blast furnace into a zinc blast furnace in one step. This method has the great effect of being able to produce crude zinc oxide briquettes with a high carbon content, making it economical, and simplifying the equipment.
実施例
鉄鋼ダストの還元焙焼により揮発回収した粗酸化亜鉛ダ
ストを湿式処理して・・ロゲンを除去した水分５０重量
係を含有する第１表に示す組成の粗酸化亜鉛ケークに、
第２表に示す組成の鉛拳亜鉛製錬水砕スラグまたは銅製
錬水砕スラグを乾量基準の粗酸化亜鉛１００重量部に対
して５〜２５重量部の範囲で添加し、内径３？７Ｌ、長
さ３１ｍ、＃４斜３チ、回転数１ｒ、ｌ１ｍのロータリ
ーキルンに湿量で１２ Ｔ／ｈで装入し６００〜８００
℃の温度で乾燥加熱を行って丸出した焼成物を、６Ｔ／
ｈの速匿で１対の７５０団径ｘ３００ｍｉ長のロールを
備えた双輪式団鉱機に供給し、略１７ＯＫ９／ｃａのロ
ール圧力で５０■Ｘ４４＋ｏ＋×２５ｍｍのアーモンド
形の団鉱を製造した。また比較のために、水砕スラグを
添加せず前記粗酸化亜鉛ケークをそのまま湿量で１２
Ｔ／ｈで前記と同一のロータリーキルンに装入し６００
〜８００℃の温度で乾燥加熱し、その焼成物を６ Ｔ／
ｈで前記と同一の団鉱機に供給して、略１７０ Ｋ−の
ロール圧力で同一形状の団鉱を製造した。Example Crude zinc oxide dust recovered by volatilization through reduction roasting of steel dust was wet-treated to remove rogens and form a crude zinc oxide cake containing 50 parts by weight of water and having the composition shown in Table 1.
5 to 25 parts by weight of lead fist zinc smelting granulated slag or copper smelting granulated slag having the composition shown in Table 2 is added to 100 parts by weight of crude zinc oxide on a dry weight basis, and the inner diameter is 3 to 7 L. , 31 m long, #4 diagonal 3 inches, rotation speed 1 r, 1 m rotary kiln at a wet rate of 12 T/h, 600 to 800
The baked product obtained by dry heating at a temperature of ℃ is heated at 6T/
The briquettes were fed into a twin-wheel type briquette machine equipped with a pair of rolls with a diameter of 750 mm and a length of 300 mm, and an almond-shaped briquette with a size of 50 × 44 + × 25 mm was produced at a roll pressure of approximately 17 OK9/ca. For comparison, the crude zinc oxide cake without adding granulated slag was used as it was at a wet weight of 12
Charged to the same rotary kiln as above at a T/h of 600
Dry and heat the fired product at a temperature of ~800°C for 6 T/
The briquettes were fed to the same briquette machine as described above at 1 h, and a briquette of the same shape was produced at a roll pressure of about 170 K-.
得られた団鉱の強度と製造条件の関係を第３表に示す。Table 3 shows the relationship between the strength of the obtained briquettes and manufacturing conditions.
なお第３表における団鉱の落下強度は、２ｍの高さから
団鉱加部を４回繰返し落下させた後２５鰭目の篩で篩別
した場合の篩上の割合を重量％で示したものである。The falling strength of the briquette in Table 3 is expressed as the percentage on the sieve in weight percent when the briquette is repeatedly dropped from a height of 2 m four times and then sieved through a sieve with 25 fins. It is something.
（第′ｒ頁以下余白）
第３表において、実験番号１〜４のものは団鉱機におけ
る加圧成形温度が５００℃未満であるため、得られた団
鉱の強度は低く、且つ水砕スラグ添加の効果がないが、
実験番号５〜１８のデータから非鉄製錬水砕スラグを５
重量部以上添加してロータリーキルンで加熱し、温度５
００℃以上、ロール圧力１７０Ｖ−以上で加圧成形する
ことによって、１段の製団でも強度の向上した団鉱が得
られることが判る。(Margins below page 'r) In Table 3, in experiments number 1 to 4, the pressure forming temperature in the briquette machine was less than 500°C, so the strength of the obtained briquettes was low and the water granulation Although there is no effect of adding slag,
From the data of experiment numbers 5 to 18, non-ferrous smelting granulated slag was
Add at least part by weight and heat in a rotary kiln to a temperature of 5.
It can be seen that a briquette with improved strength can be obtained even in one stage of briquette formation by pressure forming at a temperature of 00° C. or higher and a roll pressure of 170 V or higher.
特許出願人 住友金属鉱山株式会社Patent applicant: Sumitomo Metal Mining Co., Ltd.
Claims (1)
粒径１〜５ｍの非鉄製錬水砕スラグを乾量基準の粗酸化
亜鉛１００重量部に対して５〜加重量部添加し、ロータ
リーキルンで５００〜１０００℃の温度にて乾燥加熱し
た後、双輪式団鉱機に供給して、温度５００℃以上、ロ
ール圧力ＩＴＯＷＡ以上で１段で団鉱に成形することを
特徴とする粗酸化亜鉛団鉱の製造方法。Crude zinc oxide cake containing water of 50% by weight or less,
Nonferrous smelting granulated slag with a particle size of 1 to 5 m is added in 5 to 5 weight parts to 100 parts by weight of crude zinc oxide on a dry weight basis, and after drying and heating in a rotary kiln at a temperature of 500 to 1000°C, A method for producing crude zinc oxide briquette, which comprises supplying it to a type briquette machine and forming it into a briquette in one stage at a temperature of 500° C. or higher and a roll pressure of ITOWA or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7858484A JPS60224721A (en) | 1984-04-20 | 1984-04-20 | Manufacture of crude zinc oxide briquette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7858484A JPS60224721A (en) | 1984-04-20 | 1984-04-20 | Manufacture of crude zinc oxide briquette |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60224721A true JPS60224721A (en) | 1985-11-09 |
| JPS6367530B2 JPS6367530B2 (en) | 1988-12-26 |
Family
ID=13665956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7858484A Granted JPS60224721A (en) | 1984-04-20 | 1984-04-20 | Manufacture of crude zinc oxide briquette |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60224721A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851491A (en) * | 2012-08-06 | 2013-01-02 | 莱芜钢铁集团有限公司 | Red mud composite binder for oxidized pellets |
-
1984
- 1984-04-20 JP JP7858484A patent/JPS60224721A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851491A (en) * | 2012-08-06 | 2013-01-02 | 莱芜钢铁集团有限公司 | Red mud composite binder for oxidized pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6367530B2 (en) | 1988-12-26 |
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