CN87107202A - Reclaim the method and the equipment thereof of metal and metal alloy - Google Patents

Reclaim the method and the equipment thereof of metal and metal alloy Download PDF

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Publication number
CN87107202A
CN87107202A CN87107202.5A CN87107202A CN87107202A CN 87107202 A CN87107202 A CN 87107202A CN 87107202 A CN87107202 A CN 87107202A CN 87107202 A CN87107202 A CN 87107202A
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CN
China
Prior art keywords
oxygen
static
bed
coal
metal
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.)
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Application number
CN87107202.5A
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Chinese (zh)
Other versions
CN1011894B (en
Inventor
埃里克·奥塔斯奇拉格
沃纳·L·凯普林格
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.)
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
Korf Engineering GmbH
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 Korf Engineering GmbH filed Critical Korf Engineering GmbH
Publication of CN87107202A publication Critical patent/CN87107202A/en
Publication of CN1011894B publication Critical patent/CN1011894B/en
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting

Abstract

In this method, be that reducing metal oxide is produced metal or metal alloy in the reduction zone that forms by coal bed with a kind of reducing gas, iron alloy particularly.In order to obtain having the metal of big avidity with oxygen, under the effect of gravity, the coal bed of particulate oxidic starting material by being made of three layers of static bed wherein has a bed by the bottom that constitutes of degassing coal, and it is covered with the molten bath of reductive liquid metal and liquid slag.In addition, oxygen or certain oxygen-containing gas are sent into the intermediary bed so that producing main component is the thermal reduction gas of carbon monoxide, send into the combustion gas that constitutes by carbon granules and oxygen or oxygen-containing gas to the bed at top.

Description

The present invention relates in flow through the reduction zone that coal bed forms with a kind of reducing gas reducing metal oxide and produce the method for metal and metal alloy, particularly iron alloy, and for realizing the used equipment of this method.
A kind of method of smelting metal has been described in EP-A-0174291, be the method for particulate non-ferrous metal ore in sand form of the oxidation of melting copper, lead, zinc, nickel, cobalt and tin etc., in the melting gasifier of wherein above-mentioned ore in sand form being packed into by in the formed reduction zone of the fluidized-bed of coal.When ore in sand form passed through this reduction zone, the ore in sand form furnace charge of oxidation was reduced into metal, and this metal is collected in the bottom of melting gasifier.
It shows, can help reductive oxide compound and elemental carbon to react being lower than under 1000 ℃ the temperature by the method for EP-A-0174291.Yet some problems can appear, promptly when reclaiming metal and metal alloy, iron alloy particularly as ferromanganese, ferrochrome and ferrosilicon and with elemental carbon during as reductive agent, has only temperature to surpass under 1000 ℃ the situation and just can produce metal and metal alloy from their oxide compound.Because this oxide compound furnace charge that reacts under comparatively high temps is quite of short duration with the duration of contact of the carbon granules that forms fluidized-bed.
The present invention is intended to avoid these shortcomings and difficulty, and its objective is provides a kind of method and apparatus with preliminary qualification kind, make it and in a melting gasifier, to produce metal and metal alloy, particularly iron alloy, as ferromanganese, ferrochrome and ferrosilicon etc. with the bulk oxide furnace charge.Wherein metal pair oxygen has high-affinity, so that makes it only can react with elemental carbon when temperature surpasses 1000 ℃.
With this method with preliminary qualification kind, realized above-mentioned purpose according to the present invention, in this method, the bulk oxide furnace charge passes through one by three layers of static coal bed of forming under the effect of gravity, and these three layers are:
-by the bottom that degassing coal constitutes, it is covered with the molten bath of as-reduced liquid metal and liquid slag,
-oxygen or a kind of oxygen-containing gas introduced the middle layer so as to produce mainly the thermal reduction gas that constitutes by carbon monoxide and
-combustion gases of carbon granules and oxygen or oxygen-containing gas are introduced top layer.
The advantage of this method is to use the bulk oxide furnace charge of 6～50mm granularity, preferably is the furnace charge of 10～30mm with granularity.
In order to form static bed, can use granularity is that 5～100mm, particularly granularity are the suitable coal of 5～30mm.
By embodiment preferred, the thickness of the static bed at intermediary and top will remain on 1m between the 4m.
Be characterised in that according to another embodiment of the inventive method the powdered carbon granules is separated from the waste gas by static bed (reduction zone), and make these carbon granules, be preferably in the nozzle of giving the static bed of alignment of top under the hot state with oxygen or oxygen-containing gas together.
As used coal, still keeping blocky feature after being preferably in the degassing, so that it still has such size range from 5mm to 100mm in use, best size range is that 5mm is to 30mm.Should have 50% in the degassing coal that degassing back is produced at least respectively within its primary granularity 5～100mm or 5～30mm, remaining then is undersized granularity.
The advantage that method of the present invention presented is keeping to heat with fossil energy, in shaft furnace, carry out the whole known advantage of reduction process, for example, carry out convective heat exchange and metallurgical reaction with the elemental carbon in the static bed, this is for the reduction of cheap metal oxide compound and separately be necessary with metal and slag well.The coking of coal and the degassing can be finished under the situation that does not form tar and other coagulable compound.The gas that coal is produced when the degassing enters in the reducing gas that forms from degassing coal gasification as additional reductive agent.
The superior especially part of this method is that the reduction of the oxide compound of cheap element such as silicon, chromium and manganese etc. can finish under the situation without electric energy.Be the required energy of the may command coal degassing with a kind of simple method in the method for the invention, this is because undersized grain (less than 5mm) is discharged from, separates and turn back to top oxygen-containing gas blast area together along with the hot waste gas of melting gasifier, and here undersized grain is by the oxygen-containing gas oxidation and discharge heat.
To test be to get the grain fraction that some granularities are 16～20mm in behavior to particle breakdown, put it in the cell that is preheated to 1400 ℃ the degassing one hour.The volume of cell is 12dm 3(decimetre 3).After then spray is cooled off with cold rare gas element, measure the distribution situation of granularity again.
The present invention further comprises an equipment of implementing the inventive method, and promptly the vertical melting gasifier of a band refractory lining has the charging bole of loading coal and bulk oxide furnace charge and the vent pipe of waste gas on the top of this melting gasifier; Have at the sidewall of melting gasifier to penetrate the conduit that coal and oxygen or oxygen-containing gas are provided respectively in the stove, then be used for collecting liquid metal and liquid slag in the bottom of melting gasifier.This melting equipment is characterised in that its inside has formed three layers of synergetic static bed A, B, C.
The annular bustle pipe of a blast pipe is equipped with in-the zone between the static bed A of bottom and the static bed B of intermediary, by these blast pipes be blown into oxygen or oxygen-containing gas and
-at this certain distance that makes progress, between the static bed C on static bed B of intermediary and top, be equipped with the annular bustle pipe that has some nozzles, in melting gasifier, spray into carbon granules and oxygen or oxygen-containing gas respectively by these nozzles.
Another advantage of this melting gasifier is to have adorned hot tornado dust collector on the pipeline of combustion gas, so that carbon granules is separated from waste gas.The outlet end of these hot tornado dust collector then is connected with flow line with the annular bustle pipe of dress nozzle.
Can explain the used method and apparatus of enforcement the present invention in more detail with the diagrammatic way, this figure shows melting gasifier and connected supplementary unit.
Represent that with 1 cylindrical melting gasifier has refractory liner 2.The bottom of melting gasifier is used to accommodate liquid metal 3 and liquid slag 4.Go out the metal mouth and represent that with 5 slag notch is represented with 6.A charging bole 7 and the charging bole 9 that the bulk oxide furnace charge is provided that lump coal is provided is housed on the top of melting gasifier.On the molten bath of liquid metal 3 and liquid slag 4, formed static coal bed, i.e. a bottom A who constitutes by degassing coal who does not have that gas passes through; A layer top is exactly the middle layer B that is made of degassing coal that gas passes through; B layer top is exactly the top layer C that is made of lump coal that gas passes through.
Have some blast pipes to pierce into the sidewall of melting gasifier 1, promptly the annular bustle pipe by blast pipe 8 is blown into oxygen or oxygen-containing gas respectively in gasifier.These pipes are installed in does not have static bed A that gas passes through and the frontier district of static bed B.
A distance on blast pipe 8, promptly the annular bustle pipe of the nozzle 10 that penetrates melting gasifier 1 sidewall is equipped with in the frontier district between layer B and layer C, sprays into the mixture of powdery carbon granules and oxygen or oxygen-containing gas thus.From a dust flue 11 that is contained in melting gasifier top the waste gas that is produced in the gasifier is introduced hot tornado dust collector 12.
In hot tornado dust collector 12, will be suspended in powdery carbon granules in the waste gas and separate and deliver to the outlet end of hot tornado dust collector 12, a distribution device 13 will be housed here, receive each nozzle 10 that is contained on the bustle pipe by conduit 14 again.The conduit that oxygen-containing gas is caused nozzle 10 is represented with 15.Hot tornado dust collector 12 can be regulated by the degree of dust filling with distribution device 13, and the separating effect of hot tornado dust collector 12 can be influenced.Conduit 16 combustion gas by hot tornado dust collector top.
Another advantage of producing the method for metal or metal alloy by the invention process is that coal and bulk oxide furnace charge are normally packed into by the charging door on melting gasifier 1 top. Coal is degassed in static bed C. The degassed necessary heat of coal is provided by the thermal reduction gas that rises from static bed B on the one hand, and the combustion heat of emitting when the oxygen-containing gas that is sprayed by nozzle 10 on the other hand burns carbon granules is supplied with. Be so selected for the vertical height of layer C, namely its temperature will reach 950 ℃ at least when gas leaves layer C. Guaranteed thus to make the cracking of tar and other condensable compound. Like this, the obstructive action of the static bed C on top just becomes impossible. In fact verified, the bed thickness from 1m to 4m is favourable for the C layer. Confirm that also the vertical height from 1m to 4m also is useful for static bed B. After coal in static bed C is degassed, when its collapses down, just formed static bed B.
The bulk oxide furnace charge is melted in static bed B and by elemental carbon it is reduced. Fusing and the required heat that reduces are used and are blown into oxygen-containing gas by blast pipe 8 in the gasifier way of the degassed generation heat of gasification of coal is provided. The liquid metal that produces in static bed B and liquid slag will flow downward and be collected and guide to below the static bed A.

Claims (10)

1, reducing metal oxide is produced in the method for metal and metal alloy (as iron alloy) in the reduction zone that the coal bed of flowing through with reducing gas forms, and its improvement comprises:
Providing one, to be divided into trilaminar static state fluidized bed, and these three layers is the static bed of a bottom that is made of degassing coal, and it is covered with the liquid reducing metal and the molten bath of slag; The static bed at a static bed of intermediary and a top.
Under the effect of gravity, guide blocky oxide compound furnace charge by said three layers of static coal bed,
In the static bed in said centre, introduce a kind of in oxygen and the oxygen-containing gas so as to produce a kind of with the carbon monoxide be main component thermal reduction gas and
In said static top layer, carry a kind of in carbon granules and oxygen and the oxygen-containing gas.
2, the method described in claim 1, the granularity of wherein said bulk oxide furnace charge is from 6mm to 50mm.
3, the method described in claim 2, wherein said bulk oxide furnace charge has the granularity from 10mm to 30mm.
4, the method for claim 1, wherein said static coal bed layer are to be formed for the coal from 5mm to 100mm by granularity.
5, method as claimed in claim 4, wherein the granularity of said coal is from 5mm to 30mm.
6, the method for claim 1, the thickness of static bed of wherein said intermediary and said top bed remains on 1m between the 4m.
7, the method for claim 1, wherein waste gas forms the reduction zone by static bed, also comprise and from said waste gas, isolate the powdery carbon granules, and said carbon granules directly is blown into the static bed in said top after one of oxygen and oxygen-containing gas are delivered to nozzle.
8, method as claimed in claim 7 wherein is transported to said nozzle to said isolated carbon granules under hot state.
9, reducing metal oxide is produced a set of equipment of metal and metal alloy (as iron alloy) in the formed reduction zone of coal bed of flowing through with reducing gas, this complete equipment comprises that a block has the garden cylindricality melting gasifier of refractory lining, this gasifier has top, sidewall and bottom, and this top comprises the charging bole of loading coal and bulk oxide furnace charge and the conduit of a combustion gas; Also have the conduit of an input coal and one of oxygen and oxygen-containing gas, this root conduit penetrates the said sidewall of said melting gasifier; The bottom of said melting gasifier then is the molten bath of collecting liquid metal and liquid slag.This complete equipment improves and is:
The static coal bed layer of a bottom, it is covered with the molten bath of reductive liquid metal and slag, the static coal bed layer on a static coal bed layer of intermediary and a top, three stacked adding together,
In order to be blown into one of oxygen and oxygen-containing gas in the critical zone between the static coal bed layer of bottom and the static coal bed layer of intermediary, be equipped with there a blast pipe annular bustle pipe and
A distance on above-mentioned nozzle provides the annular bustle pipe of the nozzle that is used for spraying into carbon granules and oxygen or oxygen-containing gas between the static coal bed layer on static coal bed layer of promptly said intermediary and said top.
10, device as claimed in claim 9, also comprise one for from said waste gas, isolating the hot tornado dust collector of carbon granules, these hot tornado dust collector just are equipped on the pipeline of combustion gas, said hot tornado dust collector have an outlet end, and also have the mobile coupling device of a carbon granules between the annular bustle pipe of the outlet end of said hot tornado dust collector and said nozzle.
CN87107202A 1986-10-30 1987-10-30 Method and equipment for producing iron alloy Expired CN1011894B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0288786A AT386007B (en) 1986-10-30 1986-10-30 METHOD AND SYSTEM FOR THE EXTRACTION OF METALS OR. METAL ALLOYS
ATA2887/86 1986-10-30

Publications (2)

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CN87107202A true CN87107202A (en) 1988-05-18
CN1011894B CN1011894B (en) 1991-03-06

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CN87107202A Expired CN1011894B (en) 1986-10-30 1987-10-30 Method and equipment for producing iron alloy

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JP (1) JP2572085B2 (en)
KR (1) KR950001910B1 (en)
CN (1) CN1011894B (en)
AT (1) AT386007B (en)
AU (1) AU597119B2 (en)
BR (1) BR8705782A (en)
CA (1) CA1327274C (en)
CZ (1) CZ279400B6 (en)
DD (1) DD262677A5 (en)
DE (1) DE3735965A1 (en)
IN (1) IN171251B (en)
PH (1) PH26200A (en)
SK (1) SK278936B6 (en)
SU (1) SU1547713A3 (en)
UA (1) UA2124A1 (en)
ZA (1) ZA878021B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102974669A (en) * 2012-11-30 2013-03-20 宁波思明汽车科技有限公司 Fusible alloy recycling method and device for pipe forming

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386006B (en) * 1986-10-30 1988-06-27 Voest Alpine Ag METHOD AND SYSTEM FOR THE EXTRACTION OF METALS OR. METAL ALLOYS
US11060792B2 (en) * 2018-03-23 2021-07-13 Air Products And Chemicals, Inc. Oxy-fuel combustion system and method for melting a pelleted charge material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN164687B (en) * 1984-08-16 1989-05-13 Voest Alpine Ag
SE453304B (en) * 1984-10-19 1988-01-25 Skf Steel Eng Ab KIT FOR MANUFACTURE OF METALS AND / OR GENERATION OF BATTLE FROM OXIDE ORE
AT382390B (en) * 1985-03-21 1987-02-25 Voest Alpine Ind Anlagen METHOD FOR THE PRODUCTION OF LIQUID PIPE IRON OR STEEL PRE-PRODUCTS
AT386006B (en) * 1986-10-30 1988-06-27 Voest Alpine Ag METHOD AND SYSTEM FOR THE EXTRACTION OF METALS OR. METAL ALLOYS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102974669A (en) * 2012-11-30 2013-03-20 宁波思明汽车科技有限公司 Fusible alloy recycling method and device for pipe forming

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Publication number Publication date
KR880005276A (en) 1988-06-28
ZA878021B (en) 1988-04-29
DD262677A5 (en) 1988-12-07
KR950001910B1 (en) 1995-03-06
PH26200A (en) 1992-03-18
ATA288786A (en) 1987-11-15
AU597119B2 (en) 1990-05-24
CN1011894B (en) 1991-03-06
SK768987A3 (en) 1998-04-08
DE3735965A1 (en) 1988-05-05
AT386007B (en) 1988-06-27
BR8705782A (en) 1988-05-31
DE3735965C2 (en) 1991-01-10
CZ279400B6 (en) 1995-04-12
SU1547713A3 (en) 1990-02-28
JPS63128132A (en) 1988-05-31
SK278936B6 (en) 1998-04-08
CZ768987A3 (en) 1994-11-16
IN171251B (en) 1992-08-22
UA2124A1 (en) 1994-12-26
AU8000487A (en) 1988-05-05
JP2572085B2 (en) 1997-01-16
CA1327274C (en) 1994-03-01

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Applicant after: Alpine Industrieanlagenbau GMBH

Applicant before: Voest-alpine Ind Anlagen Co., Ltd.

COR Change of bibliographic data

Free format text: CORRECT: APPLICANT; FROM: AUSTRIA STEEL UNITED ENTERPRISE ALPA STOCK CO. TO: AUSTRIA STEEL UNITED ENTERPRISE ALPA INDUSTRIAL INSTALLATION MANUFACTURING CO., LTD.

C14 Grant of patent or utility model
C15 Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993)
C19 Lapse of patent right due to non-payment of the annual fee