JPS62227014A - Production of molten metal from powdery ore - Google Patents
Production of molten metal from powdery oreInfo
- Publication number
- JPS62227014A JPS62227014A JP7045286A JP7045286A JPS62227014A JP S62227014 A JPS62227014 A JP S62227014A JP 7045286 A JP7045286 A JP 7045286A JP 7045286 A JP7045286 A JP 7045286A JP S62227014 A JPS62227014 A JP S62227014A
- Authority
- JP
- Japan
- Prior art keywords
- ore
- flux
- tuyere
- furnace
- blown
- 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
- 229910052751 metal Inorganic materials 0.000 title claims description 8
- 239000002184 metal Substances 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 230000004907 flux Effects 0.000 claims abstract description 32
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 8
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 7
- 230000001603 reducing effect Effects 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 29
- 239000003575 carbonaceous material Substances 0.000 abstract description 18
- 238000007664 blowing Methods 0.000 abstract description 15
- 239000000203 mixture Substances 0.000 abstract description 12
- 238000003723 Smelting Methods 0.000 abstract description 8
- 239000000571 coke Substances 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 239000011651 chromium Substances 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 18
- 230000008018 melting Effects 0.000 description 18
- 238000006722 reduction reaction Methods 0.000 description 15
- 239000000155 melt Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 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 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、金属酸化物を含有する粉状鉱石から溶融金属
を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing molten metal from powdered ore containing metal oxides.
」−ド２段に羽口を設置し、炭素系固体還元剤を売場し
た竪型炉において、上段羽口より予備還元鉱石とフラッ
クスを吹込み、これを上段羽口レースウェイ中で溶融滴
下させ、さらに下段羽口よりフラックスを吹込み、下段
羽口で発生する熱驕により金属酸化物を還元すると共に
、スラグ成分の排滓性を良好にする技術が報告されてい
る（特開昭５９−１６２２１３）。- In a vertical furnace with tuyeres installed in two stages and a carbon-based solid reducing agent sold, pre-reduced ore and flux are injected from the upper tuyere and melted and dripped in the upper tuyere raceway. Furthermore, a technique has been reported in which flux is injected from the lower tuyere to reduce metal oxides by the heat generated at the lower tuyere and to improve the ability to remove slag components (Japanese Patent Application Laid-Open No. 1983-1999). 162213).
ｈ下２段の羽口を設置したコークス充填層型溶融還元炉
において、粉鉱石を上段羽口から吹込み溶融還元する場
合には、還元反応は、上段羽口前で溶融されて下段羽口
前まで滴下する間に行われる。したがって、上下羽口間
での溶融物の滞留時間が溶融金属生成に東要な要素とな
る。In a coke packed bed type smelting reduction furnace equipped with two lower tuyere stages, when fine ore is blown into the upper tuyere and melted and reduced, the reduction reaction is carried out before the upper tuyere is melted and then transferred to the lower tuyere. It is done during the drip until before. Therefore, the residence time of the molten material between the upper and lower tuyeres becomes an important factor for the production of molten metal.
一般には炉からの排滓性を良好とするため、溶融還元で
生成する滓（スラグ）は、低融点、低粘度になるように
、フラッックス成分、添加品二を決定されている。この
ため上段羽口先で生成した滓（スラグ）が下段羽Ｌ１先
まで滴下する時間は、排滓性を重視したスラグ成分で決
定され、特に９ｓ還元性鉱石を還元する場合、上下羽口
間での滞留時間をスラグ融点、粘度を調整することによ
って、コントロー元することは困難である。In general, flux components and additives are determined so that the slag produced by melting and reduction has a low melting point and low viscosity in order to improve the ability to remove the slag from the furnace. Therefore, the time it takes for the slag generated at the tip of the upper tuyere to drip to the tip of the lower blade L1 is determined by the slag component with emphasis on slag removal. Especially when reducing 9s reducible ore, It is difficult to control the residence time of the slag by adjusting the slag melting point and viscosity.
このため、従来技術では、上段羽口からは上下段羽口間
の滴下滞留時間が鉱石の還元特性に対し、適切となるス
ラグ組成になるようなフラックスを鉱石と共に吹込み、
下段羽口からは、排滓性が良好となる低融点、低粘度の
スラグ組成を得るため、下段用１コからの滴下スラグに
対し、さらにフラックスを吹込み添加している。For this reason, in the conventional technology, a flux is injected from the upper tuyere together with the ore so that the dripping residence time between the upper and lower tuyere becomes an appropriate slag composition for the reducing characteristics of the ore.
From the lower tuyeres, flux is added by blowing into the slag dripping from the lower tuyeres in order to obtain a slag composition with a low melting point and low viscosity that provides good slag drainage.
に下羽口間のｊＲ材充填層はｆ段用口先での炭材燃焼に
よる炭材消費により、送風着に見合った速度で降下して
いる。このため上段羽口からの溶融物の滴下速度は、溶
融物の自身の滴下速度と炭材充填層の降下速度の和で表
わされる。難還元性の金属酸化物を溶融還元する場合は
大量な熱驕と滴）゛滞留時間の延長が必要となる。従来
、下段羽口で大量の炭材が燃焼するため、上下羽口間の
炭材降下速度はＶ〈なり、Ｅ段別口前での生成溶融物の
滴ド速度を溶融物の組成の調整で行っても、滴下速度の
コントロールは困難である。The packed bed of JR material between the lower tuyeres is lowering at a speed commensurate with the blowing suit due to consumption of carbon material by carbon material combustion at the tip of the f-stage. Therefore, the dropping rate of the melt from the upper tuyere is expressed as the sum of the dropping rate of the melt itself and the descending rate of the carbonaceous material packed bed. When melting and reducing metal oxides that are difficult to reduce, a large amount of heat and a long residence time are required. Conventionally, since a large amount of carbonaceous material is burned in the lower tuyere, the descending speed of the carbonaceous material between the upper and lower tuyeres is V, and the dripping speed of the produced melt before the E-stage inlet is adjusted by adjusting the composition of the melt. However, it is difficult to control the dropping rate.
下段用１１に吹込まれた鉱石、フラックスが溶融し、上
段羽口まで滴下する間の滴下滞留時間は、下段羽口での
コークス燃焼によるコークス充填層の降ドにも支配され
るので、溶融物の融点、粘度等の物性のみでコントロー
ルすることはできない。The drip residence time during which the ore and flux injected into the lower tuyeres melt and drip to the upper tuyere is also controlled by the precipitation of the coke packed bed due to coke combustion in the lower tuyere, so the melt cannot be controlled solely by physical properties such as melting point and viscosity.
特にクロム鉱石等の難還元性鉱石の溶融還元においては
、大♀の、８量を必要とするため、七下段羽口共に、送
風Ｊｊ、、送風温度、富化Ｍ素驕を増加することにより
１羽口先炭材燃焼量が大量になる。このため炭材充填層
の降下速度は大となり。In particular, in the melting and reduction of hard-to-reducible ores such as chromium ore, a large amount of 8 is required, so by increasing the blowing temperature and enrichment M for all seven lower tuyeres, A large amount of carbon material is burned at the end of each tuyere. For this reason, the descending speed of the carbonaceous packed bed becomes high.
溶融物の滴下滞留時間の延長は生成スラグ組成のみの調
整では困難となる。It is difficult to extend the dripping residence time of the melt by adjusting only the composition of the produced slag.
本発明はこのような溶融物の滴下滞留時間を適正に延長
し、難還元性の金属酸化物の溶融還元を低エネルギーレ
ベルで効率よく行うことを目的とする。The object of the present invention is to appropriately extend the dropwise residence time of such a molten material, and to efficiently perform melting and reduction of refractory metal oxides at a low energy level.
上′Ｔ：２段羽口全羽口した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
還元を行う場合に、上段羽口で吹込む鉱石・ スラック
スを、製造する溶融金属の還元特性に合った上下段羽口
間の滴下滞留時間になるように、配合するフラックス量
を調整する。さらに−上段羽口より粉コークス等の粉状
炭素系還元剤と７ラツクスとを混合して吹込み、粉状炭
材の燃焼により、上下段羽口間の炭材充填層の燃焼を抑
制してその降下速度を調整する。また下段羽口からフラ
ックスを吹込むことにより上段羽口から滴下するスラグ
の組成を調整し、排滓性の良い低融点、低粘度のスラグ
組成とする。Upper'T: When melting and reducing ore and flux by injecting ore and flux from the upper tuyere in a carbonaceous packed bed type smelting reduction furnace with all tuyeres, the ore and flux injected through the upper tuyere are The amount of flux to be blended is adjusted so that the dripping residence time between the upper and lower tuyeres matches the reduction characteristics of the molten metal to be produced. Furthermore, a mixture of a powdered carbon-based reducing agent such as coke powder and 7 lux is injected from the upper tuyere, and the combustion of the powdered carbonaceous material suppresses the combustion of the carbonaceous material packed bed between the upper and lower tuyeres. to adjust its descent speed. In addition, by blowing flux through the lower tuyere, the composition of the slag dripping from the upper tuyere is adjusted, resulting in a low melting point, low viscosity slag composition with good sludge removal properties.
本発明は上下２段の羽口を設置した炭材充填層型溶融還
元炉を用いて、粉粒鉱石から溶融金属を製造する場合、
上段羽口に粉粒状鉱石およびフラックスを混合した状態
で吹込む装置を設置するとＪ（に、下段用１１に粉状フ
ラックスと粉コークスを吹込む装；４を設置し、に記」
二’Ｆ−Ｂ羽口に設置した粉粒状鉱石およびフラックス
の吹込み装置を用い、１一段羽口からは、−上下段羽口
間の炉内発生熱りＩＸ、、Ｉ：、下段羽口間隔および鉱
石の還元特性を考慮し、適正ＩＩ′Ｘの粉粒状鉱石およ
びスラックスを混合し吹込むこととしたので、上段羽口
先レースウェイで生成した溶融物の滴下速度が最適とな
る。In the present invention, when producing molten metal from powder ore using a carbonaceous packed bed type smelting reduction furnace equipped with upper and lower tuyeres,
If a device for blowing a mixture of powdered ore and flux is installed in the upper tuyere, a device for blowing powdered flux and coke powder into the lower tuyere 11 will be installed, and as described in .
Using the blowing device for powdered ore and flux installed at the 2'F-B tuyere, the heat generated in the furnace between the upper and lower tuyeres is IX, I:, from the 1st-stage tuyere. Considering the spacing and the reducing properties of the ore, it was decided to mix and blow in the appropriate II'X powdered ore and slack, so that the dropping rate of the melt produced in the upper tuyere tip raceway would be optimal.
また、上段羽口からは、上下段羽口間の炭材充填層の降
下速度を溶融物の上下段羽口間の滴下、滞留時間が還元
反応に最適となるように粉状炭材を吹込み調整する。こ
の下段羽口から粉状炭材を吹込み、炭素系固体充填材の
降下速度を制御し、鉱石の還元性、溶融性に応じて上段
羽口から吹き・込まれた粉状鉱石の滴下時間、上下羽口
間の滞留時間を調整することが、本発明の最も重要なポ
イントである。）架材吹込量を増加させるとその燃焼に
より吹込酸素を消費するので）Ｒ素糸固体還元剤（コー
クス）の降下速度が遅くなり溶融物の滴下時間が長くな
る。In addition, powdered carbonaceous material is blown from the upper tuyere so that the falling speed of the carbonaceous material packed bed between the upper and lower tuyeres is controlled so that the melt drips between the upper and lower tuyeres and the residence time becomes optimal for the reduction reaction. Adjust the amount. Powdered carbonaceous material is injected from the lower tuyere, and the descending speed of the carbon-based solid filler is controlled, and the dripping time of the powdered ore injected from the upper tuyere is adjusted according to the reducibility and meltability of the ore. The most important point of the present invention is to adjust the residence time between the upper and lower tuyeres. ) If the amount of bridge material blown is increased, the blown oxygen is consumed by its combustion, so the falling speed of the R thread solid reducing agent (coke) slows down and the dropping time of the melt becomes longer.
さらに上段羽口からは、炉床８特性、溶融物生成ｊ−０
を考慮し、炉床に滴下滞留するスラグ組成が炉からの排
滓性に対し良好となる融点、粘度になるようにフラック
スＨ，Ｈを決定し、上段羽口から滴下する溶融物中ヘフ
ラックスを吹込むので溶融物の還元を最適条件で行うこ
とができる。Furthermore, from the upper tuyere, hearth 8 characteristics, melt production j-0
Considering this, fluxes H and H are determined so that the slag composition dripping and staying in the hearth has a melting point and viscosity that are favorable for slag removal from the furnace. Since the gas is blown into the reactor, the melt can be reduced under optimal conditions.
第１図に示すように溶融還元炉を用いて、３０屯州％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
。As shown in FIG. 1, a production test of pig iron containing 30% chromium was carried out according to the present invention using a smelting reduction furnace.
炭材充填層型溶融還元炉１は上段羽口２とｒ段羽口３を
備え、炉り方の炭材供給装置５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４
から高温のガスが上下羽口２．３に供給される。The carbonaceous material packed bed type smelting reduction furnace 1 is equipped with an upper stage tuyere 2 and an r stage tuyere 3, and is supplied with a carbon-based solid reducing agent from a carbonaceous material supply device 5 in the furnace to form a packed bed in the furnace. There is. High temperature blower device 4
High temperature gas is supplied to the upper and lower tuyeres 2.3 from the upper and lower tuyeres.
供給装置８は粉状炭材およびフラックスを下段羽口へ、
供給装置９は鉱石およびフラックスを下段羽口２へ、そ
れぞれ粉粒体を羽口に吹込む粉粒体吹込装置ｔｏ、ｔｔ
を経て羽口に粉粒体を送入する。The supply device 8 feeds powdered carbonaceous material and flux to the lower tuyere.
The supply device 9 is a powder blowing device to, tt that blows ore and flux into the lower tuyere 2, and powder and granule into the tuyere, respectively.
The granular material is fed into the tuyere through the tuyere.
溶融したメタルは出銑口１２から排出され、スラグは出
滓口１３から排出される。The molten metal is discharged from the tap hole 12, and the slag is discharged from the slag hole 13.
炉ｌから排出したガスは排ガス処理装置１５で処理され
る。The gas discharged from the furnace 1 is treated by an exhaust gas treatment device 15.
溶融還元炉の仕様は次の通りである。The specifications of the melting reduction furnace are as follows.
炉内径：１１００ｍｍφ
炉 高：５０００ｍｍ
羽 １−１ ： Ｌ、ド２段、円周上釜３箇所以ドに結
果を示す。Furnace inner diameter: 1100mmφ Furnace height: 5000mm Feather 1-1: L, 2 stages, results are shown in 3 or more places on the circumference of the pot.
ａ）１１段羽口吹込部石、フラッフ配合比および吹込速
度
鉱石およびフラックスの配合比：
鉄 篤 石：３６．７重量％
クロム鋸石：４４．６重星％
石 灰 石：１６．３屯量％
珪 石 ＝２．４屯量％
吹込速度：６９ｋｇ／Ｈｒ
ｂ）ド段羽ロ吹込フラックス配合比とフランクス、粉コ
ークス吹込ら１：
配合比：
石 灰 石ニア３重呈％
珪石 ＝２７重量％
フラッックス吹込丑：４８ｋｇ／Ｈｒ
粉コークス吹込＠、 ： １７ ｋ ｇ ／ ＨｒＣ）
上下段別ロ間スラグ融点および粘度融点：１５５０℃
粘度：５．５ポアズ
ｄ）炉床滞留スラグ融点および粘度
融点：１３５０℃
粘度：４．Ｏポアズ
また、前記条件による炉床滞留スラグ中のクロムは、１
．２屯４＋Ｌ％であった。a) 11th stage tuyere blowing part stone, fluff mixing ratio and blowing speed Mixing ratio of ore and flux: Iron stone: 36.7% by weight Chrome saw stone: 44.6% Limestone: 16.3 tons Amount % Silica stone = 2.4 tons % Blow rate: 69 kg/Hr b) Blend ratio of double-blow blowing flux and Franks, coke powder blowing et al. Weight% Flux injection: 48 kg/Hr Coke powder injection: 17 kg/HrC)
Melting point and viscosity of slag between upper and lower stages Melting point: 1550°C Viscosity: 5.5 poise d) Hearth retention slag melting point and viscosity Melting point: 1350°C Viscosity: 4. O poise Also, under the above conditions, chromium in the hearth retention slag is 1
．． It was 2 tons 4+L%.
比較例として前記条件でｒ段羽口からの粉コークス吹込
みを行わない操業を行った。この場合の炉床滞留スラグ
中のクロムは２．１ ＋、 ！１’：％であった。As a comparative example, an operation was conducted under the above conditions without blowing coke breeze through the r-stage tuyere. In this case, the chromium in the hearth retention slag is 2.1 +! It was 1':%.
以」−のようにフラックスの吹込部を上ド段羽日間で分
１１７Ｉするとともに、下段羽口から粉コークスを吹込
むことによって、ヒ下没羽口間では、高融点、高粘度ス
ラブを生成し、滴下滞留時間をコントロールすることに
よって、５元率の向」二、歩留の−１−昇、さらに炉床
での低融点、低粘度のスラグ成分調整ができた。As shown in the figure below, the flux is blown into the upper tuyeres for 117 hours, and coke powder is injected from the lower tuyere to produce a slab with a high melting point and high viscosity between the lower tuyeres. By controlling the dropwise residence time, it was possible to improve the quintuple ratio, increase the yield by -1, and further adjust the slag components to have a low melting point and low viscosity in the hearth.
本発明により、溶融還元炉内での還元反応を正視した溶
融物の物性および滞留時間の調整および炉床からの排滓
性が良好なスラグの生成が可能となった。これにより適
ｌＥな反応速度を保つことができ、エネルギー消費量を
節減でき、歩留が向上し、また粉粒状還元剤はコークス
より安価である。According to the present invention, it has become possible to adjust the physical properties and residence time of the melt while taking into account the reduction reaction in the smelting reduction furnace, and to generate slag with good slag removal from the hearth. This makes it possible to maintain a suitable reaction rate, reduce energy consumption, improve yield, and the granular reducing agent is cheaper than coke.
第１図は本発明の構成を示すブロック図である。
■・・・炭素系固体還元剤充填層型溶融還元炉２・・・
、［二段羽口
３・・・ド段羽口
４・・・高温送風装置
５・・・コークス供給装置
６・・・鉱石ホッパ
７・・・フラックスホッパ
８・・・フラックス粉状炭材供給装置
９・・・鉱石フラックス供給装置
１０・・・鉱石フラックス吹込装置
１１・・・ブラックス粉状炭材吹込装置１２・・・出銑
口
１３・・・出滓口
１４・・・粉状ｊＲ材ホッパ
１５・・・配ガス処理装置FIG. 1 is a block diagram showing the configuration of the present invention. ■・・・Carbon-based solid reducing agent packed bed type smelting reduction furnace 2...
, [Two-stage tuyere 3... Double-stage tuyere 4... High-temperature blower 5... Coke supply device 6... Ore hopper 7... Flux hopper 8... Flux powdery carbon material supply Device 9...Ore flux supply device 10...Ore flux injection device 11...Blacks powder carbon material injection device 12...Tapping port 13...Slag port 14...Powder jR Material hopper 15...Gas distribution processing device
Claims (1)
高温空気を吹込む上下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
粒状鉱石から溶融金属を製造する方法において、前記上
段の羽口から、高温空気と共に粉粒状鉱石とフラックス
を前記竪型炉内に吹込むと共に、前記下段羽口から、粉
状鉱石の還元特性に応じて高温空気と共にフラックスと
粉粒状炭素系還元剤を前記竪型炉内に吹込むことを特徴
とする粉状鉱石からの溶融金属製造方法。1. Using a vertical furnace with a plurality of tuyere provided in two stages, each having a plurality of tuyeres, in which a packed bed containing only a carbon-based solid reducing agent is formed and high-temperature air is blown into the lower part, powder and granule containing metal oxides are produced. In the method for producing molten metal from ore, powdery ore and flux are blown into the vertical furnace together with high-temperature air from the upper tuyere, and at the same time, from the lower tuyere, the pulverized ore is blown into the vertical furnace according to the reducing characteristics of the powdered ore. A method for producing molten metal from powdered ore, characterized in that flux and a granular carbon-based reducing agent are blown into the vertical furnace together with high-temperature air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045286A JPH0240723B2 (en) | 1986-03-28 | 1986-03-28 | FUNJOKOSEKIKARANOYOJUKINZOKUSEIZOHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045286A JPH0240723B2 (en) | 1986-03-28 | 1986-03-28 | FUNJOKOSEKIKARANOYOJUKINZOKUSEIZOHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62227014A true JPS62227014A (en) | 1987-10-06 |
| JPH0240723B2 JPH0240723B2 (en) | 1990-09-13 |
Family
ID=13431910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7045286A Expired - Lifetime JPH0240723B2 (en) | 1986-03-28 | 1986-03-28 | FUNJOKOSEKIKARANOYOJUKINZOKUSEIZOHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0240723B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013537259A (en) * | 2010-09-15 | 2013-09-30 | テクノロジカル リソーシーズ プロプライエタリー リミテッド | Direct smelting process |
-
1986
- 1986-03-28 JP JP7045286A patent/JPH0240723B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013537259A (en) * | 2010-09-15 | 2013-09-30 | テクノロジカル リソーシーズ プロプライエタリー リミテッド | Direct smelting process |
| US10000821B2 (en) | 2010-09-15 | 2018-06-19 | Tata Steel Limited | Direct smelting process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0240723B2 (en) | 1990-09-13 |
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