JPS62227015A - Method for operating carbonaceous material-packed bed type smelting and reducing furnace - Google Patents
Method for operating carbonaceous material-packed bed type smelting and reducing furnaceInfo
- Publication number
- JPS62227015A JPS62227015A JP7045386A JP7045386A JPS62227015A JP S62227015 A JPS62227015 A JP S62227015A JP 7045386 A JP7045386 A JP 7045386A JP 7045386 A JP7045386 A JP 7045386A JP S62227015 A JPS62227015 A JP S62227015A
- Authority
- JP
- Japan
- Prior art keywords
- tuyeres
- tuyere
- air
- oxygen
- amount
- 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
- 238000003723 Smelting Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 27
- 239000001301 oxygen Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 19
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 239000003575 carbonaceous material Substances 0.000 description 10
- 230000004907 flux Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
- C21B13/002—Reduction of iron ores by passing through a heated column of carbon
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、製鉄および合金鉄製造に用いる炭材充填層型
溶融還元炉の操業方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of operating a carbonaceous packed bed type smelting reduction furnace used in iron manufacturing and ferroalloy manufacturing.
上下２段に羽口を有する炭素系固体還元剤を充填した竪
型炉において、高温空気と共に少なくとも上段羽口より
予＠還元鋸石およびフラックスを吹込むことにより、溶
融金属を製造する技術が報告されている（特開昭５７−
１９８２０５）。A technology has been reported to produce molten metal in a vertical furnace filled with a carbon-based solid reducing agent with tuyeres in two stages, upper and lower, by injecting pre-reduced saw stone and flux from at least the upper tuyeres together with high-temperature air. (Unexamined Japanese Patent Publication No. 1983-
198205).
七ド２段の羽口を有する固体炭材の充填層型溶融還元炉
において、上下段羽口より高温空気を吹込み少なくとも
上段羽口から鉱石とフラックスを吹込むことにより溶融
金属を製造する場合、以下の問題点がある。When producing molten metal by blowing high-temperature air through the upper and lower tuyeres and injecting ore and flux from at least the upper tuyere in a packed bed smelting and reduction furnace for solid carbonaceous material that has two tuyeres. , there are the following problems.
このような溶融還元炉では、吹込んだ鉱石、フラックス
の溶融は、Ｌ段別口前の送風により形成されるレースウ
ェイ空間にて行われ、さらにこの溶融物が下段羽口まで
滴下する間に下段羽口前での１ν材の燃焼熱により還元
され、その結果炉床に溶融金属とスラグが滞留する。In such a smelting reduction furnace, the injected ore and flux are melted in a raceway space formed by air blowing in front of the L-stage inlet, and while this melt drips down to the lower tuyere, The 1ν material is reduced by the heat of combustion in front of the lower tuyere, and as a result, molten metal and slag remain in the hearth.
したがって、溶融還元金属の生成速度は、上段羽口前レ
ースウェイ空間での鉱石の溶融速度および上下役羽口間
の溶融物の滴下時の還元速度のどちらかによって律速さ
れ、各々の速度は、溶融還元に供される金属酸化物の溶
融性および還元性に依存し、製造する金属の種類によっ
て異なる。Therefore, the production rate of molten reduced metal is determined by either the melting rate of the ore in the raceway space in front of the upper tuyere or the reduction rate when the melt drops between the upper and lower tuyeres, and each rate is It depends on the meltability and reducibility of the metal oxide subjected to melt reduction, and varies depending on the type of metal to be produced.
従って・限られた設備によって生産性を向上させるため
に、溶融速度が律速になる場合は上段羽口の送風量、酸
素富化量を増加させ、また還元速度が律速となる場合は
下段羽口の送風量、酸素富化量を増加させる必要がある
。従来技術の上下段羽口から単に高温空気を吹込むこと
のみではこのような発生熱量のコントロールが困難であ
る。Therefore, in order to improve productivity with limited equipment, if the melting rate is rate-limiting, increase the air flow rate and oxygen enrichment amount from the upper tuyere, and if the reduction rate is rate-limiting, increase the amount of oxygen enrichment from the lower tuyere. It is necessary to increase the amount of air blown and the amount of oxygen enriched. It is difficult to control the amount of heat generated by simply blowing high-temperature air through the upper and lower tuyeres of the prior art.
金属酸化物は、次の４種類がある。 There are four types of metal oxides:
（１） 溶融および還元共に容易なもの、゛（２） 溶
融および還元共に困難なもの。(1) Those that are easy to melt and reduce; (2) Those that are difficult to melt and reduce.
（３） 溶融は容易であるが、還元は困難なもの。(3) It is easy to melt but difficult to reduce.
（４） 溶融は困難であるが、還元は容易なもの。(4) Difficult to melt but easy to reduce.
以と、４種類がある。このため金属酸化物の特性に合わ
せ、上段羽口前での発生熱量および下段羽口前での発生
８量を調整する必要があるが、従来技術では不可能であ
る。There are four types. For this reason, it is necessary to adjust the amount of heat generated before the upper tuyere and the amount generated before the lower tuyere in accordance with the characteristics of the metal oxide, but this is not possible with the prior art.
また、Ｌ段別口に吹込まれた金属酸化物は、羽口前の送
風によって形成されるレースウェイ空間で溶融されるた
め、レースウェイ空間容積は、吹込まれる金属酸化物お
よびフラッフの容量に対し適切な容積になるように送風
条件を決定することが必要である。In addition, the metal oxide injected into the L stage port is melted in the raceway space formed by the air blowing in front of the tuyere, so the raceway space volume depends on the capacity of the metal oxide and fluff injected. However, it is necessary to determine the air blowing conditions to obtain an appropriate volume.
さらに従来技術では、溶融または還元のいずれかの律速
条件に合った送風条件によって、上下段羽口共に送風を
行うため、送風量および送風中の富化酸素は無駄に増加
し、送風設備および竪型炉から発生する排ガスの処理設
備が大型となるとともに、炭材の消費量も増大する。Furthermore, in the conventional technology, air is blown from both the upper and lower tuyeres under the air blowing conditions that match the rate-limiting conditions of either melting or reduction, which results in a wasteful increase in the amount of air blown and enriched oxygen during air blowing. As the processing equipment for exhaust gas generated from mold furnaces becomes larger, the amount of carbon material consumed also increases.
本発明はこのような問題点を解決する方法を提供するこ
とを目的とする。The present invention aims to provide a method for solving these problems.
上下２段の羽口を有する炭材充填層型溶融還元炉におい
て、上段羽口から鉱石、フラックスを吹込み、溶融還元
を行って溶融金属を製造する場合に、金属酸化物の溶融
還元特性および溶融金属の生成量に応じて、上下段羽口
各々への高温空気送風量を３１整し、上下段羽口先での
炭材燃焼による発生熱量をそれぞれ上下独立に設定する
。また。When manufacturing molten metal by blowing ore and flux into the upper and lower tuyeres in a carbonaceous packed bed type smelting-reduction furnace that has two upper and lower tuyeres, the smelting-reduction characteristics of metal oxides and Depending on the amount of molten metal produced, the amount of high-temperature air blown to each of the upper and lower tuyeres is set to 31, and the amount of heat generated by combustion of carbonaceous material at the tips of the upper and lower tuyeres is set independently for the upper and lower stages, respectively. Also.
送風により羽口先での炭材の燃焼温度を調整するため送
風中に酸素を添加するが、上下段羽口各々の羽口先燃焼
温度を調整するため上下段羽口先々の酸素添加最を任意
に設定する。Oxygen is added during air blowing to adjust the combustion temperature of the carbon material at the tip of the tuyere, but in order to adjust the combustion temperature of the tuyere tips of each of the upper and lower tuyeres, the amount of oxygen added to the tips of the upper and lower tuyeres can be adjusted arbitrarily. Set.
１下２段の羽口を有する炭材充填層型溶融還元炉におい
て、粉粒状鉱石から溶融金属を製造する場合、上下段調
ロヘ送風される高温空気量を上下全容々に対し任意に調
整可能な機構を上下段羽口への送風配管等へ設置して空
気量を調整することによって、製造する金属の金属酸化
物の溶融性、還元性等の物性に対し、適切な−Ｌ下段羽
口間の高温空気の送風バランスをとることができる。1. When producing molten metal from powdered ore in a carbonaceous packed bed type smelting reduction furnace with two lower tuyere stages, the amount of high-temperature air blown to the upper and lower stages can be arbitrarily adjusted for the entire upper and lower volumes. By installing a mechanism in the ventilation pipes to the upper and lower tuyeres to adjust the amount of air, the lower tuyeres can be adjusted to suit the physical properties such as the meltability and reducibility of the metal oxide of the metal to be manufactured. It is possible to balance the blowing of high-temperature air between
また、上下段羽口先々に送風される高温空気中へ、任意
量の酸素を添加することが可能な酸素添加装置を設置し
それぞれ、上下段羽口へ送風される高温空気中へ酸素を
添加することにより前記金属酸化物の特性に合った羽口
先レースウェイ空間の温度を得ることができる。In addition, we installed an oxygen addition device that can add any amount of oxygen to the high-temperature air blown to the tips of the upper and lower tuyeres. By doing so, it is possible to obtain a temperature in the tuyere tip raceway space that matches the characteristics of the metal oxide.
金属酸化物の溶融性、還元性は、実験的に定めることが
でき、実炉における羽口空気量および空気中の酸素量は
、例えば実路の条件、フラックス条件と共に個別にシミ
ュレーションによって定めることができる。またこの操
業のために、上下段に分配する高温空気量は各々流量を
測定し、さらに１ド段羽口に各□々添加する酸素量は、
各々高温空気量に対する比率設定を行うことにより添加
すると共に流量も各々測定する。The meltability and reducibility of metal oxides can be determined experimentally, and the amount of air at the tuyere and the amount of oxygen in the air in an actual furnace can be determined individually by simulation together with the actual road conditions and flux conditions, for example. can. In addition, for this operation, the flow rate of high-temperature air distributed to the upper and lower stages is measured, and the amount of oxygen added to each tuyere of the first stage is determined by
Each is added by setting the ratio to the amount of high-temperature air, and the flow rate of each is also measured.
第１図に示した竪型溶融還元炉を用いて、３０％クロム
を含有した銑鉄の製造試験を本発明により実施した。EXAMPLES A test for producing pig iron containing 30% chromium was carried out according to the present invention using the vertical smelting reduction furnace shown in FIG.
炭材充填層型溶融還元炉ｌは上段羽口４上下段羽口５を
備え、炉上方の炭材供給装置６から炭素系固体還元剤を
供給され炉内に充填層を形成している。高温送風装置２
から高温のガスが供給され、高温送風分配装置３はこれ
を丘下羽口４．５に分配する。The carbonaceous material packed bed type smelting reduction furnace 1 is equipped with an upper tuyere 4 and an upper and lower tuyere 5, and a carbonaceous solid reducing agent is supplied from a carbonaceous material supply device 6 above the furnace to form a packed bed in the furnace. High temperature blower device 2
Hot gas is supplied from the hot air distribution device 3 which distributes it to the downhill tuyeres 4.5.
粉粒状鉱石供給装置７およびフラックス供給装置６８か
らの供給物を受けて、これらの粉粒体を羽口に吹込む吹
込装置９は粉粒体輸送装置１０を経て羽口に粉粒体を送
入する。A blowing device 9 receives the supplies from the granular ore supply device 7 and the flux supply device 68 and blows these granules into the tuyeres. Enter.
一方、酸素供給装置１３から酸素を上下段羽口に供給装
置１１．１２を介して供給する。On the other hand, oxygen is supplied from the oxygen supply device 13 to the upper and lower tuyeres via supply devices 11 and 12.
溶融したメタルは出銑口１５から排出され、スラグは出
滓口１４から排出される。The molten metal is discharged from the tap hole 15, and the slag is discharged from the slag hole 14.
炉１から排出したガスは排ガス処理袋２ｔ１６で処理さ
れる。Gas discharged from the furnace 1 is treated in an exhaust gas treatment bag 2t16.
試験に供した溶融還元炉の仕様は次の通りである。The specifications of the melting reduction furnace used in the test are as follows.
炉内径：１１００ｍｍφ 炉 高： ５０００ｍｍ 充填層層高：３０００ｍｍ 羽「】数：上段 ３本、 下段３本 ａ）従来技術による操業は次の通りであった。Furnace inner diameter: 1100mmφ Furnace height: 5000mm Filled bed height: 3000mm Number of feathers: 3 on top, 3 on bottom a) The operation according to the prior art was as follows.
送風量： １６００ Ｎ ｒｎ’ ／ Ｈｒ富化酸素驕
：２ｏｏＮｒｒｒ７Ｈｒ
］ニド段羽口送風条件：
に段進風
８００ Ｎｍ’／Ｈｒ
酸Ｊ、 １００ Ｎｍ’／ Ｈｒ
下段送風
８０ＯＮｍ”／Ｈｒ
酸素１００Ｎｒｒｆ／Ｈｒ
Ｌ段羽口粉体吹込端：
鉄鉱石１８０ ｋ ｇ ／ Ｈｒ
クロム鉱石２９０ ｋ ｇ ／ Ｈｒ
石灰石２９０ｋｇ／Ｈｒ
珪石１１０ｋｇ／Ｈｒ
以−Ｌの条件で７ｔ／Ｄの３ｏ％Ｃｒ含有銑鉄の製造が
できた。Air flow rate: 1600 Nrn'/Hr Enriched oxygen: 2ooNrrr7Hr Nido stage tuyere air blowing conditions: Second stage air 800 Nm'/Hr Acid J, 100 Nm'/Hr Lower stage air 80ONm''/Hr Oxygen 100Nrrf/Hr L stage Tuyere powder injection end: Iron ore 180 kg/Hr Chromium ore 290 kg/Hr Limestone 290 kg/Hr Silica stone 110 kg/Hr Under the following conditions, 7t/D of 3o% Cr-containing pig iron could be produced.
ｂ）本発明による試験
上記従来の操業に対して検討を加え、クロム鉱石、フラ
ックス組成の溶融性、還元性に応じて、次の条件を設定
した。b) Test according to the present invention The conventional operation described above was studied, and the following conditions were set depending on the meltability and reducibility of the chromium ore and flux composition.
送風ｊｌｉ ： １４００ Ｎ ｒｎ′／ Ｈｒ富化ｍ
素置： ｌ ５０ Ｎｒｎ”／ Ｈｒ上段羽口送風条件
：
８０ＯＮｒｒｆ（送風ｆｉｌ） ／ Ｈｒ、酸素１００
Ｎｒｎ３／Ｈｒ
下段羽口送風条件：
６０ＯＮｒｎ”（送風％）／Ｈｒ
酸素 ５ＯＮｍ”／Ｈｒ
上段羽口粉体吹込量：
鉄鉱石１８０ｋｇ／Ｈｒ
クロム鉱石２９０ ｋ ｇ ／ Ｈｒ
石灰石２９０ ｋ ｇ ／ Ｈｒ
珪石１１０ｋｇ／Ｈｒ
以上の条件で７ｔ／Ｄの３０％Ｃｒ含有銑鉄を製造する
ことができた。Blow jli: 1400 N rn'/ Hr enrichment m
Preparation: l 50 Nrn”/Hr Upper tuyere Blowing conditions: 80ONrrf (blow fil)/Hr, oxygen 100
Nrn3/Hr Lower tuyere blowing conditions: 60ONrn" (air blowing %)/Hr Oxygen 5ONm"/Hr Upper tuyere powder injection amount: Iron ore 180kg/Hr Chromium ore 290 kg/Hr Limestone 290 kg/Hr Silica stone 110kg /Hr Under the above conditions, 7t/D of 30% Cr-containing pig iron could be produced.
従って、本発明により、同一炉において従来法より、送
風量を２００ Ｎｒｎ’／Ｈｒ、酸素を５ＯＮｍ’／Ｈ
ｒ減少することができた。Therefore, according to the present invention, in the same furnace, compared to the conventional method, the air flow rate was reduced to 200 Nrn'/Hr, and the oxygen amount was reduced to 5ONm'/H.
r could be reduced.
炭材の消費量は本発明では、７５０ ｋｇ／Ｈｒ、従来
技術では８００ｋｇ／Ｈｒと、本発明では同一・生産量
で５０ ｋ ｇ ／ Ｈｒの炭材を減少することができ
た。The consumption of carbonaceous material was 750 kg/Hr in the present invention, and 800 kg/Hr in the conventional technology, and the present invention was able to reduce the consumption of carbonaceous material by 50 kg/Hr at the same production amount.
本発明により、上下段羽口への送風量および酸素富化量
を上ド段別々に調整することにより、送風４ｋ、酸素富
化量また炭材の消費量を生産量が同一条件で、従来技術
より減少することができた。According to the present invention, by adjusting the amount of air blown to the upper and lower tuyeres and the amount of oxygen enriched separately for the upper tier, the amount of air blown 4K, the amount of oxygen enriched, and the amount of carbon material consumed can be reduced under the same production conditions as before. technology could be reduced.
第１図は本発明の構成を示すブロック図である。
ｌ・・・炭材充填層型溶融還元炉、２・・・高温送風装
置、３・・・高温送風分配装置、４・・・上段羽口、５
・・・下段羽口、６・・・炭材供給装置、７・・・粉粒
状鉱石供給装置、８・・・フラックス供給装置、９・・
・粉粒体羽口吹込装置、１０・・・粉粒体輸送装置。
１１・・・Ｅ段羽口酸素供給装置、１２・・・下段羽口
酸素供給装置、１３・・・酸素供給装置、１４・・・出
滓＋１．１５・・・出銑口、１６・・・排ガス処理装置
。FIG. 1 is a block diagram showing the configuration of the present invention. l...Charcoal material packed bed type smelting reduction furnace, 2...High temperature blower, 3...High temperature air distribution device, 4...Upper tuyere, 5
... Lower tuyere, 6 ... Carbon material supply device, 7 ... Powdered ore supply device, 8 ... Flux supply device, 9 ...
- Powder tuyere blowing device, 10... Powder transportation device. 11... E stage tuyere oxygen supply device, 12... Lower tuyere oxygen supply device, 13... Oxygen supply device, 14... Slag+1.15... Tapping port, 16...・Exhaust gas treatment equipment.
Claims (1)
高温空気を吹込む上下少なくとも２段に設けられたそれ
ぞれ複数の羽口を有する竪型炉を用いて、金属酸化物を
含有する粉粒状鉱石からの溶融金属を製造する方法にお
いて、前記上下２段の羽口への高温空気量ならびに該高
温空気中の酸素濃度を、金属酸化物の溶融還元特性およ
び溶融金属の生成量に応じて、上下段独立して調整する
ことを特徴とする炭材充填層型溶融還元炉の操業方 法。[Scope of Claims] 1. A method for producing metals by using a vertical furnace having a plurality of tuyeres each provided in at least two upper and lower stages, in which a packed bed of only a carbon-based solid reducing agent is formed, and high-temperature air is blown into the lower part. In a method for producing molten metal from granular ore containing oxides, the amount of high-temperature air to the upper and lower two stages of tuyeres and the oxygen concentration in the high-temperature air are determined based on the smelting reduction characteristics of the metal oxide and the molten metal. A method of operating a carbonaceous packed bed type smelting reduction furnace, characterized in that the upper and lower stages are independently adjusted according to the amount of produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045386A JPH0227406B2 (en) | 1986-03-28 | 1986-03-28 | TANZAIJUTENSOGATAYOJUKANGENRONOSOGYOHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045386A JPH0227406B2 (en) | 1986-03-28 | 1986-03-28 | TANZAIJUTENSOGATAYOJUKANGENRONOSOGYOHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62227015A true JPS62227015A (en) | 1987-10-06 |
| JPH0227406B2 JPH0227406B2 (en) | 1990-06-18 |
Family
ID=13431939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7045386A Expired - Lifetime JPH0227406B2 (en) | 1986-03-28 | 1986-03-28 | TANZAIJUTENSOGATAYOJUKANGENRONOSOGYOHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0227406B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514142U (en) * | 1991-05-30 | 1993-02-23 | 川崎製鉄株式会社 | Air flow distribution device for vertical smelting reduction furnace |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681560B (en) * | 2011-03-10 | 2017-03-15 | 中国恩菲工程技术有限公司 | The computational methods of air and oxygen demand in a kind of smelting system |
-
1986
- 1986-03-28 JP JP7045386A patent/JPH0227406B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514142U (en) * | 1991-05-30 | 1993-02-23 | 川崎製鉄株式会社 | Air flow distribution device for vertical smelting reduction furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0227406B2 (en) | 1990-06-18 |
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