CN86101735A - Metallurgical composites and production method thereof - Google Patents
Metallurgical composites and production method thereof Download PDFInfo
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- CN86101735A CN86101735A CN86101735.8A CN86101735A CN86101735A CN 86101735 A CN86101735 A CN 86101735A CN 86101735 A CN86101735 A CN 86101735A CN 86101735 A CN86101735 A CN 86101735A
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- ore
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- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
- C21B5/023—Injection of the additives into the melting part
- C21B5/026—Injection of the additives into the melting part of plastic material
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/02—Preliminary treatment of ores; Preliminary refining of zinc oxide
-
- 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
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
-
- 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
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The method of producing metal composites comprises the following steps: that (a) brown coal make plastomer through shearing treatment; (b) simultaneously or afterwards pulverizing ore and/or concentrate are mixed with coal in (a) step; (c) will become DB in the mixture compacted that (b) step produces; (d) make the DB drying to produce metallurgical composites.Step (c) is preferably realized by extruding.The present invention also provides a kind of melting method, and composition is heated to certain temperature in this method, and ore or concentrate are reduced into metal under this temperature.
Description
The present invention relates to metallurgical composites and use this method for compositions.
On the one hand, the invention provides the composition that constitutes by ores containing metal oxides and the brown coal of upgrading, and produce this kind method for compositions.
On the other hand, propose to handle this composition, comprise smelting process, also at the row of the present invention's consideration so that make wherein metal oxide reductive method.
The brown coal of upgrading that use among the present invention are the invention product of our narration in Australian common pending application application form No. 24294/84 (announcing on August 23rd, 1984) and/or No. 52590/86 (PG9283) preferably.
The brown coal of narrating in above-mentioned common pending application application form are upgraded/debulking methods, be with when exploitation water content be about 60% soft, loose former brown coal and change water content into and be about 10% hard, anti-ground black solid fuel.In treating processes, contain the brown coal of exploiting the water yield and in selected rubbing device, shear/grind, require differently according to hardness to final closely knit product, the treatment time can change in 5 minutes or shorter and 1 hour or longer time.
Shearing has several effects, is important in this article.Make coal become the fine particle shape, originally the moisture of fine dispersion in the porous organization of coal has at least a part to become the successive liquid phase, thereby makes coal become moistening and plasticity is arranged, and produces the coal surface of the new cleavage of a large number of and area at last.The surface of these new cleavage participates in intergranular bridging cohesive process, finally makes ature of coal become hard and closely knit, meanwhile, removes and lose the major part of original moisture.It is common that density is increased to 1.4 by about 0.8.Moisture removal speed very fast (for example in 20 ℃ still air 24 hours can remove 80%) can reach highest hardness in 3～4 days.After grinding, the coal that has become plasticity is by suitable extruding or high pressure briquetting device, i.e. ring-roll press, briquetting under suitable pressure.In special row, briquetting device is the tube inner carrier formula briquetting press that spiral is handled, and this machine pressing goes out the cylindrical sample of diameter 3 or 10mm, and this sample can be cut into the length of any needs.Applying pressure when extruding, closely close for the new cleaved surface that makes coal particle, thus promote the bridging combination and accelerate in conjunction with speed, to believe to be important greatly.In extrusion process, use higher pressure, can shorten grinding the time of coal greatly.Particularly when using high efficiency masher, then grind time reality and can shorten to 5 minutes or shorter.
In compacting process, shearing grinds the required shortest time of former brown coal, must be enough to make produce conspicuous moisture and plasticity-in the coal body.In actually operating, desired condition can be rule of thumb by visual inspection.The length of time is decided by the running speed of masher, and shear action intensity that masher reached and machine make coal constantly enter the efficient of shear zone.
With regard to very short shear time, the moisture of coal may be deciding factor; If moisture is too low, the efficient of machine will sharply descend.Experience shows, moisture is about 60% brown coal by weight and demonstrates optimum shearing grind performance, and moisture is near 54% or when lower, and the shearing grind performance of brown coal is not satisfied.
Use and rub the arbor rotating speed when being 40 and 20 rev/mins, rotor and sidewall spacers as the sigma type kneading machine operation of 0.3mm, the various brown coal in the Victoria and the Germany place of production all successfully grind in the shearing in 30 seconds and change into squeezable plastic state in the time.But, should not be considered to the included shortest time of requirement of the present invention 30 seconds, because this time general is decided by the efficient of institute's use machine to a great extent.Any time that is enough to former brown coal are changed into squeezable plastic state all will suit.
Should be noted that in practice, shear the time that grinds too weak point will limit the particle size reduction of coal, thereby next step compensates with the pressure of raising extrusion machine possibly to a certain extent.In fact, more dried plastomer will partly produce high pressure at the extrusion machine coal outlet.
Another kind of preferred embodiments of the present invention provides a kind of successive shear extrusion method.It is very short that it grinds the time, allows operate continuously, and in operation, fritter brown coal (5mm or littler) feed low speed (20～40 rev/mins) sigma type continuously and shear masher.The design of the tectonic type of this kind machine, the spiral machine of producing coal by suitable layout stopped the needed time (as top defined) coal in the shear zone before discharging machine.The coal that grinds that the spiral machine of producing coal will wet is given extrusion head, and the design of this extrusion head can provide needed squeeze pressure, makes pelletizing become very firm, is enough to hold out against immediately after shaping suitable load.
Can finish above-mentioned functions and have a spiral to produce coal machine and the machine of the extrusion machine that connects mutually, be Janke; The plant-manufactured sigma type of the KH IKA-Werk Beingen of Kunkel limited-liability company HKS50 type pelletizer.
Although we do not wish that the advantageous results that is observed is subjected to the restriction of any supposition or imaginary mechanism, we believe, in case obtain the coal surface of enough cleavage/shearings, just begin to carry out compacting with sizable speed immediately.This can cause further improving the operate continuously process that is provided, thereby the time that coal is stopped in grinding (shearing) district just enough makes coal charge effectively be pushed in high-pressure extrusion or briquetting device.
To studies show that of the fine and close brown coal crumb properties of the drying of producing with this method, when progressively being heated to comparatively high temps, granule will keep its shape, and become harder through regular meeting.Between 300 and 400 ℃, the fugitive constituent that is water vapor and low-molecular-weight organic matter (mainly being phenol) form is gone out segregation.More than 500 ℃, only produce permanent gases (mainly being hydrogen, carbon monoxide, carbonic acid gas and methane) about.We studies show that to the brown coal of compacting it has the potential purposes in some metallurgical application, promptly can be used as the composition granule.
Though we do not wish that advantageous results that the present invention has observed is subjected to the restriction of any supposition or imaginary mechanism, we believe that following consideration is significant:
(a) make above-mentioned aqueous or wet plasticity-coal body behind the former coal grinding, for tiny dispersed particles material for example effective combination of metal mining powder or fine ore suitable vehicle is provided;
(b) grind the pulverizing state of coal, cause very closely physical bond of metal mining powder and plastic coal particle, the latter will be as strong reductive agent;
(c) the spontaneous evaporation water loss owing to spontaneously remove transpiring moisture in the granule, becomes dry a hardening in the compacting reaction process, and this granule is particularly suitable for metallurgical needed heating faster;
(d) be heated to approximately more than 500 ℃ the time, the brown coal that are compacted will be emitted a large amount of strong reducing property gaseous mixture.
(e) after pyrolysis or carbonization at low temperature, granule provides the residual carbon with high reactivity state, this part carbon will with very closely combination mutually to be restored.Should be pointed out that in this article the brown coal charcoal is considered to effectively, metallurgical reductive agent fast.In the brown coal of compacting, except that activated carbon, hydrogen particularly will be strengthened reduction reaction widely with the hydrogen that status nascendi exists.
We determine pulverizing breeze or fine ore by experimental study widely, and particularly the ferric oxide breeze can mix with wet plasticity coal facies apace, and when it adds, can obtain even and stable mixture during coal grinding.This mixture can be fast as extruding or briquetting, and granule of making like this or briquetting can be dry and be hardened to surprising degree.In some cases, the hardened product shows that intensity descends to some extent when air drying, but its intensity usually is restored when pyrolysis.Under other situation, between inorganic and coal component, tangible reaction is arranged, cause dried product strength to increase substantially.
Described in the example that the metallurgical performance of various compositions will provide later.
In our research process, apparent, in brown coal composition granule, can produce very fast reduction rate.The hydrogen atom of the new generation of emitting when as mentioned above, the major contribution of system reducing ability seemingly being preheated by composition or nascent hydrogen provide.Polyhydroxy phenol is the main provider of pyrolysis hydrogen seemingly, but also may comprise other reactive material.With emitting of very approaching mutually atomic hydrogen to be restored, solid breeze grain had extremely fast and effectively reductive action of potential.
Generally speaking, composition prepared in accordance with the present invention has a lot of significant advantage, thereby can make it have the ability to provide:
(a) can under cold state, bond effectively particulate breeze or fine ore,
(b) unsintered composition granule or briquetting have enough intensity, make its pack into the preheating oven or pyrolysis oven that can bear oven dry satisfactorily and continue,
(c) various oxide compound ores are reduced rapidly and effectively, ferric oxide ore particularly, and comprise other ore, and for example: chrome ore,
(d) be that part or most of metallized or briquetting are sent into smelting furnace simultaneously together with carbon, particularly send into a kind of ideal method in the smelting furnace that uses the new bath smelting technology of modernization,
(e) reductive that obtains with this method/metallized or briquetting are convenient to loading and unloading, transportation and are stored, and do not have the sort of secondary oxidation that all kinds prereduction iron ore composition taken place or the danger that nature occurs,
This method can be produced and be contained a certain amount of virgin metal ore deposit and concentrate, for example the useful composition of zinc ore concentrate.
Embodiment 1
In this tentative experiment, the brown coal of the densification that is prepared as follows-iron ore composition granule heat then to measure the kind and the quantity of its gas of being emitted.
The dry fine and close brown coal-iron ore composition granule that contains ferric oxide 75% prepares with method described in the embodiment 2.Used the coal in Victoria, Australia La Zhuobai (Latrobe) basin sedimentary province Luo Yiyang (Loy Yang) ore deposit.Make coal in 400 ℃ nitrogen atmosphere through preliminary pyrolysis, remove moisture and lower molecular weight organic volatile after, these are placed in the silica tube that is connected with a vacuum system.
At first take out whole air, and make granule progressively be warming up to 900 ℃ with pump.Under three kinds of differing tempss,, and analyze with mass spectrometer to emitting gas sampling.Analyze the back and find that main gas is: hydrogen, carbon monoxide, carbonic acid gas, methane and a small amount of water vapor.Under three kinds of temperature, the approximate relative dividing potential drop of hydrogen, carbon monoxide, carbonic acid gas and methane as shown in Figure 1.
In the time of 600 ℃, hydrogen component is maximum, then is carbon monoxide and carbonic acid gas (about equally), and methane is then minimum.When temperature rose to 900 ℃, the amounts of hydrogen of emitting was more preponderated, and carbon monoxide also increases to some extent.Carbonic acid gas then obviously reduces, and methane is then reduced to still less.
By this test obviously as seen, the granule product of this densification can produce strong reducing property atmosphere when being heated to high temperature.This atmosphere produces additional strong reducing action to any direct reaction that composition granule or briquetting internal solid activated carbon or newborn hydrogen are produced.
Embodiment 2
Use coal (N3372 boring) and the ferric oxide fine powder of Victoria, Australia Mo Weier (Morwell) to make the composition pelletizing in all proportions.
In each case, with raw coal 200g(60% water) in a sigma type kneading machine, rubbed 4 hours, as described in our debatable Australian No. 24294/84 application form.Rubbing preceding 15 minutes of end, the brown iron oxide (testing laboratory's reagent material) of selecting weight is added in the plastomer, rub continuously the sufficiently long time then, make it thoroughly be mixed into uniform plastomer.Be made into garden cylindricality granule with a manual screw extrusion press subsequently, its specification begins to being about 8mm after the diameter 10mm(drying), length is between 10～20mm.This granule is placed testing laboratory's still air seven days of 20 ℃, make its dry and sclerosis.Through pyrolysis processing, beginning kept one hour under 300～400 ℃ of temperature next step exsiccant granule in nitrogen gas stream, to remove remaining moisture and lower molecular weight organic volatile, further heated then one hour, made temperature rise to 700 ℃.The heating of design the latter half is in order to determine whether begun detectable reduction in relevant temperature range.In an example (seeing below), once granule was heated to 1070 ℃, at this moment granule is in the reducing atmosphere that produces in pyrolysis of coal.
These weight that contain ferric oxide respectively be 10%, 30%, 50% and 75%(based on dry coal weight).The composition that contains 10% ferric oxide has the crushing strength of average out to 17 MPas (MPa), compares with it, and comparable crushing strength of oxygen-free iron is 30 MPas; When the granule of pyrolysis oxides-containing iron 10%, average crushing strength is increased to 20 MPas.This has shown that when pyrolysis granule further develops to the agglutinating direction.
Measure by the diameter (D) of test granule and height (H) according to micrometer, determine the compression/crushing strength of the coal granule of dry densification.
(Tirius Olsen trier company, Willor Grove on anvil Pa.), and are added in axial load on the flush end cross section, up to destroying then granule to be placed on a universal testing machine.
According to following formula, determine from the maximum load that power F(directly is subjected to by granule) calculate compressive strength б c:
бc＝（4F/πD
2）（H/D）
05
All have ferromagnetism (particularly when the ore deposit: when fine and close coal mixtures is 75: 25) after all composition pyrolysis to 700 ℃, this shows the generation of reduced iron.
In single test, will contain Fe
2O
375% granule is put into the silica tube of joining with vacuum system.When being heated to 500 ℃, gas all is drawn out of in the pipe.To manage with pump isolatedly then, when temperature further increases to 1070 ℃ with roughly stable speed, observe the variation of pressure.The result of these measurements expresses in Fig. 2.In the time of about 900 ℃, pressure begins to raise soon, thereby must bleed to keep total pressure to be lower than barometric point with pump.Gas is emitted in a large number and is lasted till off-test always.Phenomenon described in this test is the characteristic that contains the ferric oxide granule, and has represented oxide compound and from the chemical reaction between the generation thing of coal.
In the time of 800 ℃, main reaction is that the hydrogen of emitting makes iron oxide reduction, and generates water.When this is reflected at about 900 ℃, obtain comprising the replenishing of reduction reaction of carbon monoxide and carbon, total gas pressure has and significantly has a net increase of length simultaneously.When this off-test, though granule has very strong ferromegnetism, the visible metallic iron does not appear, when temperature further rose, the use granule as the electrode in the direct current arc, then promptly produced the little iron ball that is ductile in rare gas element.
As mentioned above, contain 75%Fe
2O
3The preliminary pyrolysis to 700 of composition granule ℃ after, be placed in 1500 ℃ the iron bath, done further test.After the composition granule immerses molten iron, emit gas immediately, and during whole 30 seconds immersion molten iron, emit gas continuously.These do not break, but emit gas unceasingly, promptly are fused in the molten iron simultaneously.The side fusion of granule body fastest, because the there contacts with the furnace wall when preliminary pyrolysis, the temperature that stands is the highest.General more reduced iron is present in the zone, has therefore strengthened the impact velocity of molten iron.This test shows that the composition granule of prereduction state can be as the furnace charge that iron and carbon are provided to steel melting furnace in new bath smelting technology.
Be perfectly clear the specific details that the present invention provides above being not limited to aspect it is total.
Claims (10)
1, production metallurgy method for compositions is characterized in that comprising following steps:
(a) brown coal will be through shearing treatment so that make it make plastomer;
(b) in (a) step simultaneously or afterwards, pulverizing ore deposit or concentrate are mixed with coal;
(c) mixture compacted that step (b) is made is made fine and close entity;
(d) with fine and close entity drying, make metallurgical composites.
2, method according to claim 1 is characterized in that wherein compacting step (c) is to be realized by the method for pushing said mixture.
3, method according to claim 1 is characterized in that wherein drying step (d) is realized under room temperature or the temperature near room temperature.
4, method according to claim 1 is characterized in that wherein ore is iron ore or chrome ore.
5, method according to claim 1 is characterized in that wherein ore or concentrate are zinc ore or zinc ore concentrate.
6, produce the method for the metallurgical composites of the brown coal that comprise iron ore and upgrade, it is characterized in that comprising the following step:
(a) brown coal are handled through shearing force, so that it makes plastomer;
(b) in (a) step simultaneously or afterwards, pulverizing iron ore and coal are mixed;
(c) mixture that (b) step is made pushes, and makes the fine and close extrudate of a shape;
(d) at room temperature make a drying.
7, the metallurgical composites of producing according to right 1～6 desired any method.
8, the melting method of iron is characterized in that the composition that will produce by the method for claim 7 is heated to certain temperature, and iron ore reduction becomes metallic iron under this temperature.
9, the melting method of iron is characterized in that the composition that will produce by the method for claim 7 heats in an iron bath.
10, the melting method of iron, its characteristics are the composition produced by the method for claim 7 its preliminary pyrolysis to be warmed up to about 700 ℃, then it are immersed in the about 1500 ℃ iron bath of temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPG977685 | 1985-03-18 | ||
| AUPG9776 | 1985-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86101735A true CN86101735A (en) | 1986-11-19 |
| CN1011143B CN1011143B (en) | 1991-01-09 |
Family
ID=3770981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86101735A Expired CN1011143B (en) | 1985-03-18 | 1986-03-17 | Metallurgical composite material and production method thereof |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS61270342A (en) |
| CN (1) | CN1011143B (en) |
| BR (1) | BR8601177A (en) |
| CA (1) | CA1281907C (en) |
| DD (1) | DD250551A5 (en) |
| DE (1) | DE3608899A1 (en) |
| FI (1) | FI84840C (en) |
| FR (1) | FR2582018B1 (en) |
| IN (1) | IN165327B (en) |
| NZ (1) | NZ215368A (en) |
| SE (1) | SE463104B (en) |
| ZA (1) | ZA861957B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103261447A (en) * | 2010-12-15 | 2013-08-21 | 米德雷克斯技术公司 | Method and system for producing direct reduced iron and/or hot metal using brown coal |
| CN106903323A (en) * | 2017-04-17 | 2017-06-30 | 江苏省冶金设计院有限公司 | A kind of Iron concentrate fast reduction in low temperature method and apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10311345A1 (en) * | 2003-03-14 | 2004-09-23 | Trützschler GmbH & Co KG | Device for determining the fiber lengths and the fiber length distribution on a fiber material sample, in particular in spinning preparation |
| CN110191967A (en) * | 2016-11-23 | 2019-08-30 | 环境清洁技术有限公司 | Via the low temperature direct-reduction of the metal oxide in situ for generating reducibility gas |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE677261C (en) * | 1936-08-15 | 1939-06-22 | Max Lengersdorff | Process for preparing iron ores for reduction and smelting |
| NZ207098A (en) * | 1983-02-17 | 1986-09-10 | Univ Melbourne | Upgrading brown coal by subjecting it to shear forces |
| DE3603005A1 (en) * | 1985-02-01 | 1986-08-21 | CRA Services Ltd., Melbourne, Victoria | Method of producing compacted coal pellets |
-
1986
- 1986-03-04 NZ NZ215368A patent/NZ215368A/en unknown
- 1986-03-05 SE SE8601005A patent/SE463104B/en not_active IP Right Cessation
- 1986-03-14 FI FI861077A patent/FI84840C/en not_active IP Right Cessation
- 1986-03-14 DD DD86287911A patent/DD250551A5/en unknown
- 1986-03-17 DE DE19863608899 patent/DE3608899A1/en not_active Withdrawn
- 1986-03-17 CN CN86101735A patent/CN1011143B/en not_active Expired
- 1986-03-17 IN IN207/CAL/86A patent/IN165327B/en unknown
- 1986-03-17 JP JP61059066A patent/JPS61270342A/en active Pending
- 1986-03-17 BR BR8601177A patent/BR8601177A/en unknown
- 1986-03-17 ZA ZA861957A patent/ZA861957B/en unknown
- 1986-03-18 FR FR8603833A patent/FR2582018B1/en not_active Expired
- 1986-03-18 CA CA000504432A patent/CA1281907C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103261447A (en) * | 2010-12-15 | 2013-08-21 | 米德雷克斯技术公司 | Method and system for producing direct reduced iron and/or hot metal using brown coal |
| TWI465574B (en) * | 2010-12-15 | 2014-12-21 | Midrex Technologies Inc | Method and system for producing direct reduced iron and/or hot metal using high-moisture content carbonaceous material |
| CN103261447B (en) * | 2010-12-15 | 2016-02-03 | 米德雷克斯技术公司 | Brown coal is used to prepare the method and system of direct-reduced iron and/or molten metal |
| CN106903323A (en) * | 2017-04-17 | 2017-06-30 | 江苏省冶金设计院有限公司 | A kind of Iron concentrate fast reduction in low temperature method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| IN165327B (en) | 1989-09-23 |
| SE8601005D0 (en) | 1986-03-05 |
| FI861077A (en) | 1986-09-19 |
| ZA861957B (en) | 1987-01-28 |
| FR2582018B1 (en) | 1989-11-17 |
| FI861077A0 (en) | 1986-03-14 |
| SE463104B (en) | 1990-10-08 |
| BR8601177A (en) | 1986-11-25 |
| SE8601005L (en) | 1986-09-19 |
| FI84840C (en) | 1992-01-27 |
| FR2582018A1 (en) | 1986-11-21 |
| DE3608899A1 (en) | 1986-09-18 |
| FI84840B (en) | 1991-10-15 |
| JPS61270342A (en) | 1986-11-29 |
| NZ215368A (en) | 1988-02-29 |
| CN1011143B (en) | 1991-01-09 |
| CA1281907C (en) | 1991-03-26 |
| DD250551A5 (en) | 1987-10-14 |
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