JPS63118026A - Operating method for zinc blast furnace - Google Patents
Operating method for zinc blast furnaceInfo
- Publication number
- JPS63118026A JPS63118026A JP26480986A JP26480986A JPS63118026A JP S63118026 A JPS63118026 A JP S63118026A JP 26480986 A JP26480986 A JP 26480986A JP 26480986 A JP26480986 A JP 26480986A JP S63118026 A JPS63118026 A JP S63118026A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- zinc
- furnace
- tuyere
- blast furnace
- 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
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000011701 zinc Substances 0.000 title claims abstract description 33
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 33
- 238000011017 operating method Methods 0.000 title 1
- 239000000571 coke Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 238000007664 blowing Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 3
- 239000003575 carbonaceous material Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 102000029797 Prion Human genes 0.000 description 1
- 108091000054 Prion Proteins 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000011787 zinc oxide 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、亜鉛熔鉱炉の操業方法の改善に関し、更に詳
しくは、亜鉛熔鉱炉を炭素質還元剤として使用するコー
クスの回収した金属亜鉛１を当りのコストを可及的に低
減させて操業する方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in the method of operating a zinc sinter furnace, and more particularly, to an improvement in the method of operating a zinc sinter furnace, and more particularly, to a method for improving the method of operating a zinc sinter furnace, and more particularly, to improve the method of operating a zinc sinter furnace, and more particularly, to improve the method of operating a zinc sinter furnace. This invention relates to a method of operating zinc 1 while reducing the cost per unit as much as possible.
周知のように、熔鉱炉による亜鉛製錬では、炉頂部より
炭素質還元剤である塊状コークスと亜鉛原料である焼結
塊あるいは団鉱を装入し、炉底部の羽口より空気あるい
は酸素富化空気が導入され、亜鉛蒸気？含有するガスが
炉上部近くの出口から取り出され、亜鉛が溶融鉛滴のス
プレーが散布されているコンデンサーによってこの蒸気
から凝縮される。溶融暖はｐｂプリオンと共に炉底部か
ら排出される。As is well known, in zinc smelting using a molten ore furnace, lump coke, which is a carbonaceous reducing agent, and sintered lumps or briquettes, which are raw materials for zinc, are charged from the top of the furnace, and air or oxygen is introduced from the tuyere at the bottom of the furnace. Enriched air is introduced and zinc vapor? The gases contained are removed from an outlet near the top of the furnace, and zinc is condensed from this vapor by a condenser sprinkled with a spray of molten lead drops. The molten heat is discharged from the bottom of the furnace along with the Pb prions.
このような熔鉱炉による亜鉛製錬における製錬コストの
中で炭素質還元剤としてのコークスコストの占める比率
が極めて大きく、そのため回収する金ｆｉｌｔ当りのコ
ークスコストを低減させる方法の開発が待たれている。The cost of coke as a carbonaceous reducing agent accounts for an extremely large proportion of the smelting cost in zinc smelting using such a smelting furnace, and therefore the development of a method to reduce the coke cost per gold filt recovered is awaited. ing.
本発明はコークスコストを低減でさる亜鉛熔鉱炉の操業
方法を得ることを目的とする。An object of the present invention is to obtain a method for operating a zinc smelting furnace that reduces coke costs.
この目的を達成するため、本発明者は本発明を、亜鉛熔
鉱炉の操業において、炭素質遷元剤として平均粒度１ｍ
ｍ以下の粉状コークス３該炉の羽口より吹込むよう【こ
構成したものである。To achieve this objective, the present inventor has developed the present invention as a carbonaceous transition agent in the operation of a zinc smelting furnace with an average particle size of 1 m.
The furnace is constructed so that powdered coke of 3 m or less is blown into the furnace through the tuyeres.
本発明において、亜鉛熔鉱炉の炉頂部より炭素質還元剤
である塊状コークスと亜鉛原料である焼結塊あるいは団
鉱ご装入し、炉底部の羽口より空気あるいは酸素富化空
気を導入して亜鉛熔鉱炉を操業する際、該羽口より導入
する空気あるいは酸素富化空気と共に炭素質還元剤とし
て平均粒度１ｍｍ以下の粉状コークス号吹込む。In the present invention, lump coke, which is a carbonaceous reducing agent, and sintered lumps or briquettes, which are raw materials for zinc, are charged from the top of the zinc melting furnace, and air or oxygen-enriched air is introduced from the tuyeres at the bottom of the furnace. When operating a zinc smelt furnace, powdered coke with an average particle size of 1 mm or less is injected as a carbonaceous reducing agent together with air or oxygen-enriched air introduced through the tuyeres.
この粉コークスは、塊状コークスの篩下あるいＧｉ 粉
砕物、コークス炉から発生するコークスダスト、オイル
コークスの粉砕物などで、揮発分２０重皿％以下、水分
５重量％以下のものを意味する。This coke powder refers to the unsieved or crushed coke of lump coke, coke dust generated from coke ovens, crushed oil coke, etc., and has a volatile content of 20% or less and a moisture content of 5% or less. .
揮発分が２０重量％を超えたり、水分が５重量％を超え
ると、亜鉛熔鉱炉から取り出された亜鉛蒸気が水蒸気に
より再酸化されてフンデンサー内で酸化亜鉛ドロスが増
加し、亜鉛回収率が低下し易くなる。又、この粉状コー
クスの平均粒度が１ｍｍを超えると、羽口先の反応ゾー
ンにおける還元反応にそのコークスが充分寄与できない
上に、増加する吹込み用空気のために羽口先温度が低下
する。If the volatile content exceeds 20% by weight or the water content exceeds 5% by weight, the zinc vapor taken out from the zinc smelting furnace will be re-oxidized by water vapor, and zinc oxide dross will increase in the duster, reducing the zinc recovery rate. It becomes easier to decrease. If the average particle size of the powdered coke exceeds 1 mm, the coke cannot sufficiently contribute to the reduction reaction in the reaction zone at the tuyere tip, and the temperature at the tuyere tip decreases due to the increased amount of blown air.
このように安価な粉状コークスを羽口より吹込むことに
より炉頂部より装入する高価な塊状コークス量を低減す
ることかでさ、回収する金属亜鉛１を当りの炭素質還元
剤としてのコークス（塊状及び粉状）コストを従来の同
じコークス（塊状）コストに対して大幅に低減させるこ
とができる。In this way, by injecting cheap powdered coke through the tuyere, the amount of expensive lump coke charged from the top of the furnace can be reduced. (Lump and powder) costs can be significantly reduced relative to the same conventional coke (Lump) costs.
この低減の程度は、粉状コークスの使用量が少なくても
太さいものである。又、その使用量を多くすると、コス
ト低減は一般には増大するが、余りに多過ぎると（１）
炉頂部からの装入物中に占める焼結塊あるいは団鉱の割
合が増大して、これらが炉内で半溶融状態になり易くな
り、そのために炉内の通気抵抗が増大したり、（２）吹
込まれた粉状コークスの反応ゾーン内での燃焼率が低下
したりして溶鉱炉の安定な操業に支障ひ生じ易くなるの
で、おのずからその使用量としては全コークスの約４０
％までとするのが好ましい。The degree of this reduction is large even if the amount of powdered coke used is small. Also, if the amount used is increased, the cost reduction will generally increase, but if it is used too much, (1)
The proportion of sintered lumps or briquettes in the charge from the top of the furnace increases, making it easier for them to become semi-molten in the furnace, which increases the ventilation resistance in the furnace, and (2) ) The combustion rate of the injected powdered coke in the reaction zone decreases, which tends to interfere with the stable operation of the blast furnace, so naturally the amount used is approximately 40% of the total coke.
%.
以下、本発明を実施例と比較例により更に詳細に説明す
る。Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples.
実施例
直径１２８順の羽口１６本を備えた炉床面積１１．８ｍ
、高さ１０．８ｍの亜鉛熔鉱炉の炉頂部よりサイズ２５
〜１００朋の塊コークスと焼結塊を装入パケットにより
装入し、９５０Ｃの空気？導入する羽口から第１表に示
す組成と粒度を有するコークス炉から発生するコークス
ダスト及び微粉炭を各々０〜０．１２ｔ／時間の割合で
直径２５ｍｍの炭素質還元剤吹込み専用のノズルから吹
込むことにより亜鉛熔鉱炉の操業を行なった。この際、
コークスダストの吹込みは流送用として１２Ｎｍ／時間
の空気と共に、微粉炭の吹込みは、爆発の危険性が高い
空気ではなく、流送用として１２Ｎｍ／時間の窒素と共
に行なった。又、１操業期間をいずれも２週間で一定と
し、その間に生産された金属亜鉛量は２００〜２３０ｔ
／日であった。Example Hearth area 11.8 m with 16 tuyeres of 128 diameters
, size 25 from the top of the zinc melting furnace with a height of 10.8 m.
~100 mm of lump coke and sintered mass were charged in a charging packet, and air was heated to 950C. Coke dust and pulverized coal generated from a coke oven having the composition and particle size shown in Table 1 are introduced from the tuyere at a rate of 0 to 0.12 t/hour from a 25 mm diameter nozzle dedicated to injecting carbonaceous reducing agent. A zinc molten ore furnace was operated by blowing. On this occasion,
The injection of coke dust was carried out with 12 Nm/h of air for flow, and the injection of pulverized coal was carried out with 12 Nm/h of nitrogen for flow, rather than air with a high risk of explosion. In addition, each operation period is fixed at two weeks, and the amount of metal zinc produced during that period is 200 to 230 tons.
/ day.
第 １ 表 これらの操業の条件及び得られた結果を第２表に示す。Table 1 The conditions of these operations and the results obtained are shown in Table 2.
第 ２ 表 ※１ 代替率（％） ＝−ｘ １ｏ 。Table 2 *1 Replacement rate (%) = -x 1o.
ユ※３
※５
※２ 着換率（（５）＝−Ｘ １００
※３ ａ：吹込みを行なわず、塊コークスのみの操業
時での回収した金属亜鉛１を当りの塊コークス量
×４ ｂ：吹込んだコークスダスト又は微粉炭の回収し
た金属亜鉛１を当りの量
※５ ｃ ：吹込みを行なって操業した時の回収した
金属亜鉛１を当りの塊コークス量
〔発明の効果〕
以上から明らかなように、高価な塊状コークスの一部を
羽口から吹込む安価な粉状コークスに代替させて亜鉛熔
鉱炉操業３行なうことにより、この亜鉛製錬コストの中
で極めて大きな比率を占めル炭素質還元剤のコストを、
コンデンサーでの亜鉛回収率Ｂ従来と同様に維持したま
＼大幅に低減することができる。Yu *3 *5 *2 Exchange rate ((5) = -X 100 *3 a: Amount of lump coke per 1 recovered metallic zinc during operation with only lump coke without blowing x 4 b : Amount of injected coke dust or pulverized coal per 1 unit of recovered metal zinc *5 c : Amount of lump coke per 1 unit of recovered metal zinc when operating with injection [Effects of the invention] From the above As is clear, by replacing a portion of the expensive lump coke with inexpensive powder coke injected through the tuyere and operating the zinc smelting furnace, the cost of zinc smelting becomes extremely large. reduce the cost of carbonaceous reducing agent,
Zinc recovery rate B in the condenser can be significantly reduced while maintaining the same as before.
Claims (1)
平均粒度１ｍｍ以下の粉状コークスを、該炉の羽口より
吹込むことを特徴とする亜鉛熔鉱炉の操業方法。(1) A method for operating a zinc molten slag furnace, which comprises injecting powdered coke with an average particle size of 1 mm or less as a carbonaceous reducing agent through the tuyere of the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26480986A JPS63118026A (en) | 1986-11-05 | 1986-11-05 | Operating method for zinc blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26480986A JPS63118026A (en) | 1986-11-05 | 1986-11-05 | Operating method for zinc blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63118026A true JPS63118026A (en) | 1988-05-23 |
| JPH0475290B2 JPH0475290B2 (en) | 1992-11-30 |
Family
ID=17408515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26480986A Granted JPS63118026A (en) | 1986-11-05 | 1986-11-05 | Operating method for zinc blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63118026A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0855448A1 (en) * | 1997-01-27 | 1998-07-29 | The BOC Group plc | Operation of lead/zinc blast furnaces |
| WO2000005424A1 (en) * | 1998-07-20 | 2000-02-03 | M.I.M. Hüttenwerke Duisburg Gmbh | Method for producing zinc using the is process in an is shaft furnace and corresponding is shaft furnace |
| WO2005083133A1 (en) * | 2004-03-01 | 2005-09-09 | Mitsui Mining & Smelting Co., Ltd. | Method for analyzing state inside blast furnace in pyrometallurgy of zinc and method for zinc smelting |
-
1986
- 1986-11-05 JP JP26480986A patent/JPS63118026A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0855448A1 (en) * | 1997-01-27 | 1998-07-29 | The BOC Group plc | Operation of lead/zinc blast furnaces |
| WO2000005424A1 (en) * | 1998-07-20 | 2000-02-03 | M.I.M. Hüttenwerke Duisburg Gmbh | Method for producing zinc using the is process in an is shaft furnace and corresponding is shaft furnace |
| WO2005083133A1 (en) * | 2004-03-01 | 2005-09-09 | Mitsui Mining & Smelting Co., Ltd. | Method for analyzing state inside blast furnace in pyrometallurgy of zinc and method for zinc smelting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0475290B2 (en) | 1992-11-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |