CN102168170A - Method for converting natural non-magnetic iron ore into magnetite - Google Patents
Method for converting natural non-magnetic iron ore into magnetite Download PDFInfo
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- CN102168170A CN102168170A CN201110048361XA CN201110048361A CN102168170A CN 102168170 A CN102168170 A CN 102168170A CN 201110048361X A CN201110048361X A CN 201110048361XA CN 201110048361 A CN201110048361 A CN 201110048361A CN 102168170 A CN102168170 A CN 102168170A
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Abstract
The invention discloses a method for converting natural non-magnetic iron ore into magnetite by a microwave method, and particularly relates to a method for converting non-magnetic iron ore such as natural limonite, hematite and siderite into the magnetite through processes of crushing, smashing, sieving, mixing, microwave roasting treatment, heat preservation, cooling, grinding, magnetic separation and the like. In the method, the production process is intact, the mechanization degree is high, production processing cycle is shortened, production processing speed is improved, the conversion rate of a magnetite powder product is high, and the continuous production can be realized; and the device simultaneously has the characteristics of energy conservation and high efficiency, and can improve the quality of products and the stability of the yield.
Description
Technical field
The present invention relates to a kind ofly, be converted into the method for magnetite powder, belong to a kind of method of iron ore dressing processing technique field as limonite, rhombohedral iron ore, spathic iron ore with natural non magnetic ore.
Technical background
Non-magnetic iron stone mainly contains limonite, rhombohedral iron ore and spathic iron ore.
Limonite wherein is oxidizing aqueous iron ore, by generating after other iron ore weathering, distributes the most extensively at occurring in nature, and its chemical formula is nFe
2O
3MH
2O (n=1～3, m=1～4).Limonite is actually by pyrrhosiderite (Fe
2O
3H
2O), liquid drugs injection iron ore (2Fe
2O
3H
2O) form with the mixture of ferric oxide that contains different crystal water and shale material.Most iron-bearing minerals are with 2Fe in the limonite
2O
3H
2The O form exists, and is moisture more than 30%, generally is the brown of various tones, block, loose porous shape or Powdered, nonmagnetic.
The chemical ingredients of rhombohedral iron ore wherein is Fe
2O
3, crystal belongs to the oxide mineral of trigonal system.The good rhombohedral iron ore mutation of crystallization all is a black, and is moisture below 10%, but the color of mineral dust all is red, and redness is the color that the overwhelming majority does not have the argillaceous hematite of crystal habit, and is nonmagnetic.
Spathic iron ore wherein is the ore that contains iron carbonate, and major ingredient is FeCO
3, contain the calcium salt and the magnesium salts of quite a lot of quantity, present Steel Gray, moisture below 10%, nonmagnetic.
The ferric oxide ore that nature exists divides magnetic and non magnetic two big classes from magnetic angular, the metallurgical main raw material of modern steel is the smart powder of iron that various ferric oxide ores are chosen, the high more blast-furnace smelting that is beneficial to the later stage more of iron-holder in the smart powder of iron, the smart powder iron-holder of the iron that blast furnace needs need reach more than 60%.And the production of iron ore and processing mainly contain fragmentation, pulverizing, ball milling, magnetic separation, the dry smart powder of iron that obtains.Such technical process is very convenient to the ore dressing of Armco magnetic iron ore, so long as magnetite, 10% following content can magnetic separation reach 60% above iron-holder; And non-magnetic iron can't reach 60% iron-holder, after having obtained a large amount of vignites, mine tailing sand after a large amount of ferruginous non-magnetic iron stones and the magnetic separation contains higher non magnetic iron or weak magnetism but fails to obtain exploitation and utilization because of the difficulty of magnetic concentration technology comprehensively, and these ore and non magnetic iron tailings that contain natural limonite, rhombohedral iron ore, spathic iron ore fail fully to be exploited and utilize.The non-magnetic iron stone reserves such in China have the over ten billion ton, in the today of being becoming tight iron ore resource day, searching has a kind of easier, method that effective means can be converted into natural limonite, rhombohedral iron ore, spathic iron ore magnetite, can realize making full use of of non-magnetic iron stone resource.
Recent years, the fire coal of employing, coal gas or Sweet natural gas firepower sinter process are arranged with limonite, rhombohedral iron ore (Fe
2O
3), spathic iron ore is reduced into magnetite (Fe
3O
4) method; And the methods that adopt 1000 ℃ of processing of microwave high-temperature rhombohedral iron ore.The former stove roasting reduction mainly is suitable for high-grade iron ore reduction, and the ore difficulty of the low taste of centering is bigger; Secondly, the heating maturing temperature is also higher; Its three, processing stand needs coal-fired or other combustion gas resource; These effects limit the application of this technology at non-magnetic iron stone.The latter's method, the temperature of microwave reduction rhombohedral iron ore be more than 1000 ℃, and to convert the cost of magnetite to too high for rhombohedral iron ore in the practical application, and this energy consumption is near the cost of direct ironmaking, so no promotional value.
Summary of the invention
Purpose of the present invention will solve exactly and mine tailing after natural limonite, rhombohedral iron ore, spathic iron ore and the iron ore magnetic separation etc. is contained non magnetic iron be converted into ferromagnetic technical problem, and energy consumption is low, cost is low, can realize making full use of of non-magnetic iron stone resource.
Technical problem to be solved by this invention can be achieved by following technical solution:
A kind of natural non-magnetic iron is converted into the method for magnetite,
If natural non-magnetic iron comprises that then following operation (1) is to (8);
If non magnetic mine tailing raw material comprises that then following operation (3) is to (8);
Concrete operation is:
(1) fragmentation and pulverizing process, first meal essence, further again fine powder essence, just the operational condition of pulverizing is that jaw crusher breaks into dead small with the bulk raw ore, handles 3-20 minute;
(2) screening process screens according to the size of particle diameter;
(3) burden process, carbon content in fe TFe content and coal dust or the nut coke in elder generation's mensuration ore, then in the fe quality: carbonaceous amount=100: 12～15 ratios are joined; The coal dust of general employing limonite and pulverizing or nut coke are by weight the 5-10% proportioning in this burden process, and the coal dust of rhombohedral iron ore and pulverizing or nut coke stir the compound after the batching by weight the 10-15% proportioning;
(4) microwave calcining treatment process adopts the above-mentioned iron ore compound of industrial microwave roasting apparatus heating calcination process;
(5) insulation operation after the reduction reaction temperature section is expected in the mixing of microwave heating equipment roasting iron ore, is put the container that the iron ore compound is housed into heat-preserving equipment, and the iron ore compound carries out reduction reaction in heat-preserving equipment;
(6) refrigerating work procedure, the microwave heating equipment roasting and promote that reduction reaction is handled after, with the powdered iron ore normal temperature that cools, this cooling is carried out cold and hot exchange with the compound iron ore that enters before the microwave calcining, carries out nature then and lowers the temperature;
(7) grind pure operation, grind in ball mill equipment, this grinds operation and grinds discharge port and be set between the 0.1mm-800 order;
(8) magnetic separation circuit carries out twice magnetic by magnetic separator to the Armco magnetic iron ore and separates, and magnetic separated the product that obtains dry, and can obtain the Armco magnetic iron ore.
Among the present invention, in the pure operation of powder (1), the bulk material is attacked and destroy, and dead small flows out from the crusher feed opening automatically, and the operational condition that dead small enters second stage fine powder essence is that jaw crusher or ore are played husky machine processing, and the treatment time is about 3-10 minute.
Among the present invention, screening process (2) carries out at reciprocating sieve equipment, and particle diameter is returned the pure operation (1) of powder greater than the particle of 2mm, and the transfer of granules that particle diameter is less than or equal to 2mm is to subsequent processing.
Among the present invention, the microwave heating treatment temperature is 250-600 ℃, and microwave frequency is 2450MHz or 915MHz, and the container that wherein holds the iron ore compound is that high temperature resistant 600 ℃ container is made.
Among the present invention, in microwave calcining treatment process (4), the iron ore compound has following three kinds at physics and the chemical reaction that this container took place:
Limonite:
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate to dissociate moisture content and crystallization moisture content,
nFe
2O
3mH
2O→→→→nFe
2O
3+mH
2O↑；
2) chemical reaction: under 250～400 ℃ of environment:
(1)3Fe
2O
3+3C+O
2→→→→2Fe
3O
4+3CO↑；
Rhombohedral iron ore:
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate from free moisture content,
2) chemical reaction: under 250～400 ℃ of environment:
(1)3Fe
2O
3+3C+O
2→→→→2Fe
3O
4+3CO↑；
Spathic iron ore:
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate from free moisture content,
2) chemical reaction: under 250～600 ℃ of environment:
(1)6FeCO
3+O
2→→→→2Fe
3O
4+6CO
2↑；
In the above-mentioned formula:
NFe
2O
3MH
2O: limonite,
NFe
2O
3: rhombohedral iron ore,
Fe
2O
3: ferric oxide,
Fe
3O
4: Z 250,
FeCO
3: iron carbonate, spathic iron ore,
C: carbon,
CO: carbon monoxide,
CO
2: carbonic acid gas,
O
2: oxygen,
TFe: fe.
Among the present invention, in microwave calcining treatment process (4), this container adopts corundum material, silicon carbide or quartz material, and profile is square, rectangle or circle, and lid is arranged, and open type can be ventilated.
Among the present invention, this equipment is microwave, electrically heated, non-electrically heated Hybrid Heating pattern or single-mode, and its envrionment temperature is controlled at 250～600 ℃, and the reaction times remained on 3-10 minute.
Among the present invention, in magnetic separation circuit (8),
Magnetic separates a little less than at first particle being hanged down gradient, and its electromagnetic field is set to 500-800 Gauss; Isolated transfer of granules to subsequent processing, is separated the product that obtains with magnetic and dried, just obtained the Armco magnetic iron ore;
Not isolated particle is carried out the strong magnetic of high-gradient to be separated, its magnetic field is set to 1200-1500 Gauss, and to subsequent processing, the product that is about to magnetic separation acquisition dries with isolated transfer of granules, just obtained the Armco magnetic iron ore, not isolated particle has been rejected as waste.
Method of the present invention compared with prior art, it is complete to have production technique, the mechanization degree height, the process for processing cycle shortens, and has improved process for processing speed and quality product, can realize continuity production, especially pass through microwave heating treatment, non magnetic iron is changed into Armco magnetic iron, improved the utilization ratio of natural non-magnetic iron greatly, realized making full use of of natural resources.
Description of drawings
Further specify the present invention below in conjunction with the drawings and specific embodiments:
Fig. 1 is converted into natural non-magnetic iron for the present invention the process flow sheet of the method for magnetite powder.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
In a preferred embodiment of the invention, natural non-magnetic irons such as mine tailing after natural limonite, rhombohedral iron ore, spathic iron ore, the magnetic separation are converted into the method for magnetite, comprise following operation:
(1) fragmentation and pulverizing process;
(2) screening process; If non magnetic mine tailing raw material, operation (1) then, (2) can omit;
(3) burden process;
(4) microwave calcining treatment process;
(5) insulation operation;
(6) refrigerating work procedure;
(7) grind pure operation;
(8) magnetic separation circuit.
Wherein the pure operation of powder is first meal essence, further again fine powder essence, just the operational condition of pulverizing is that jaw crusher breaks into dead small with the bulk raw ore, the general processing 3-10 minute, wherein, the bulk material is ceaselessly attacked and destroy, and dead small flows out from the crusher feed opening automatically, and this kind equipment is a kind of disintegrating apparatus of commonplace use in metallurgical and mining machinery.The operational condition that dead small enters second stage fine powder essence is that jaw crusher or ore are played husky machine processing, and the treatment time is about 3-10 minute;
Wherein screening process adopts reciprocating sieve equipment (the order number of filter sieve is 2mm in the equipment) to carry out, and the particle that particle diameter is surpassed 2mm returns the pure operation of powder of (1), and the transfer of granules that particle diameter is no more than 2mm is to subsequent processing;
Wherein burden process is: carbon content in fe TFe content and coal dust or the nut coke in elder generation's mensuration ore, and then in the fe quality: carbonaceous amount=100: 12～15 ratios are joined; Generally adopt in this burden process
1, the coal dust of limonite and pulverizing or nut coke are by weight 5-10% left and right sides proportioning;
2, the coal dust of rhombohedral iron ore and pulverizing or nut coke are by weight 10-15% left and right sides proportioning;
3, spathic iron ore can not need and coal dust or nut coke proportioning;
Compound after the batching is stirred.
Wherein the microwave treatment operation is for adopting the above-mentioned iron ore compound of industrial microwave roasting apparatus heating calcination process, and the microwave heating treatment temperature reaches 250-600 ℃, and microwave frequency can be chosen 2450MHz or 915MHz wantonly; The container that wherein holds the iron ore compound is that high temperature resistant 600 ℃ container is made, can adopt corundum material, silicon carbide or quartz material, and profile can square, rectangle or circular multiple, and vent cap is arranged; Physics that is taken place and chemical reaction have following three kinds:
1, limonite:
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate to dissociate moisture content and crystallization moisture content,
nFe
2O
3mH
2O→→→→→nFe
2O
3+mH
2O↑
2) chemical reaction: under 250～400 ℃ of environment
(1)3Fe
2O
3+3C+O
2→→→→2Fe
3O
4+3CO↑
2, rhombohedral iron ore
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate from free moisture content,
2) chemical reaction: under 250～400 ℃ of environment
(1)3Fe
2O
3+3C+O→→→→2Fe
3O
4+3CO↑
3, spathic iron ore
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate from free moisture content,
2) chemical reaction: under 250～600 ℃ of environment
(1)6FeCO
3+O
2→→→→2Fe
3O
4+6CO
2↑
In the formula:
NFe
2O
3MH
2O: limonite
NFe
2O
3: rhombohedral iron ore,
Fe
2O
3: ferric oxide,
Fe
3O
4: Z 250,
FeCO
3: iron carbonate (spathic iron ore),
C: carbon,
CO: carbon monoxide,
CO
2: carbonic acid gas
O
2: oxygen.
Insulation operation wherein be microwave heating equipment roasting iron ore mix expect the reduction reaction temperature section after, the heat-preserving equipment that the container of iron ore compound enters is housed.The iron ore compound carries out reduction reaction in heat-preserving equipment, envrionment temperature is controlled at 250～600 ℃, this equipment can be microwave, electrically heated Hybrid Heating pattern or single-mode, also can be other non-electrical heat tracing pattern, the reaction times (iron ore compound traveling process) keeps about 3-10 minute;
Refrigerating work procedure wherein be the microwave heating equipment roasting and promote that reduction reaction is handled after, with the powdered iron ore normal temperature that cools, this cooling with enter microwave calcining before compound iron ore carry out cold and hot exchange, carry out nature then and lower the temperature, do not add water cooling;
Wherein grind operation for to grind in ball mill equipment, ball mill is the most conventional equipment in the iron ore processing, generally can grind to reach 800 orders, grinds discharge port and can regulate, and this operation is ground discharge port and is set between the 0.1mm-800 order.
Wherein the magnetic separation circuit arrives subsequent processing for magnetic a little less than at first particle being hanged down gradient separates (electromagnetic field is set to 500-800 Gauss) with isolated transfer of granules; Not isolated particle is carried out the strong magnetic of high-gradient separate (magnetic field is set to 1200-1500 Gauss), to subsequent processing, the product that is about to magnetic separation acquisition dries with isolated transfer of granules; Not isolated particle is rejected as waste.
By above-mentioned technical process, magnetic is separated the product that obtains dry, just obtained the Armco magnetic iron ore, this iron ore powder is converted by non-magnetic iron exactly.
Hence one can see that, it is complete that the present invention has production technique, the mechanization degree height, the process for processing cycle shortens, process for processing speed and non-magnetite powder conversion rate of products height have been improved, can realize continuity production, this device has energy-conservation, characteristics of high efficiency simultaneously, the stability that can improve product quality and yield.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand, the present invention is not restricted to the described embodiments, only be used to illustrate principle of the present invention in the foregoing description and the specification sheets, the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all belong to the scope of the invention.The scope of protection of present invention is defined by the sharp claim and the equivalent thereof of appendix.
Claims (8)
1. one kind is converted into the method for magnetite with natural non-magnetic iron, it is characterized in that,
If natural non-magnetic iron comprises that then following operation (1) is to (8);
If non magnetic mine tailing raw material comprises that then following operation (3) is to (8);
Concrete operation is:
(1) fragmentation and pulverizing process, first meal essence, further again fine powder essence, just the operational condition of pulverizing is that jaw crusher breaks into dead small with the bulk raw ore, handles 3-20 minute;
(2) screening process screens according to the size of particle diameter;
(3) burden process, carbon content in fe TFe content and coal dust or the nut coke in elder generation's mensuration ore, then in the fe quality: carbonaceous amount=100: 12～15 ratios are joined; The coal dust of employing limonite and pulverizing or nut coke are by weight the 5-10% proportioning in this burden process, and the coal dust of rhombohedral iron ore and pulverizing or nut coke stir the compound after the batching by weight the 10-15% proportioning;
(4) microwave calcining treatment process adopts the above-mentioned iron ore compound of industrial microwave roasting apparatus heating calcination process;
(5) insulation operation after the reduction reaction temperature section is expected in the mixing of microwave heating equipment roasting iron ore, is put the container that the iron ore compound is housed into heat-preserving equipment, and the iron ore compound carries out reduction reaction in heat-preserving equipment;
(6) refrigerating work procedure, the microwave heating equipment roasting and promote that reduction reaction is handled after, with the powdered iron ore normal temperature that cools, this cooling is carried out cold and hot exchange with the compound iron ore that enters before the microwave calcining, carries out nature then and lowers the temperature;
(7) grind pure operation, grind in ball mill equipment, this grinds operation and grinds discharge port and be set between the 0.1mm-800 order;
(8) magnetic separation circuit carries out twice magnetic by magnetic separator to the Armco magnetic iron ore and separates, and magnetic separated the product that obtains dry, and can obtain the Armco magnetic iron ore.
2. the method that natural non-magnetic iron is converted into magnetite according to claim 1, it is characterized in that, in the pure operation of powder (1), the bulk material is attacked and destroy, dead small flows out from the crusher feed opening automatically, the operational condition that dead small enters second stage fine powder essence is that jaw crusher or ore are played husky machine processing, and the treatment time is about 3-10 minute.
3. the method that natural non-magnetic iron is converted into magnetite according to claim 1, it is characterized in that, screening process (2) carries out at reciprocating sieve equipment, and particle diameter is returned the pure operation (1) of powder greater than the particle of 2mm, and the transfer of granules that particle diameter is less than or equal to 2mm is to subsequent processing.
4. the method that natural non-magnetic iron is converted into magnetite according to claim 1, it is characterized in that, the microwave heating treatment temperature is 250-600 ℃, and microwave frequency is 2450MHz or 915MHz, and the container that wherein holds the iron ore compound is that high temperature resistant 600 ℃ container is made.
5. according to claim 4 natural non-magnetic iron is converted into the method for magnetite, it is characterized in that in microwave calcining treatment process (4), the iron ore compound has following three kinds at physics and the chemical reaction that this container took place:
Limonite:
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate to dissociate moisture content and crystallization moisture content,
nFe
2O
3mH
2O→→→→nFe
2O
3+mH
2O↑；
2) chemical reaction: under 250～400 ℃ of environment:
(1)3Fe
2O
3+3C+O
2→→→→2Fe
3O
4+3CO↑；
Rhombohedral iron ore:
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate from free moisture content,
2) chemical reaction: under 250～400 ℃ of environment:
(1)3Fe
2O
3+3C+O
2→→→→2Fe
3O
4+3CO↑；
Spathic iron ore:
1) physical reaction: (1) material heats up,
(2) normal temperature--under 200 ℃ of environment, deviate from free moisture content,
2) chemical reaction: under 250～600 ℃ of environment:
(1)6FeCO
3+O
2→→→→2Fe
3O
4+6CO
2↑；
In the above-mentioned formula:
NFe
2O
3MH
2O: limonite,
NFe
2O
3: rhombohedral iron ore,
Fe
2O
3: ferric oxide,
Fe
3O
4: Z 250,
FeCO
3: iron carbonate, spathic iron ore,
C: carbon,
CO: carbon monoxide,
CO
2: carbonic acid gas,
O
2: oxygen,
TFe: fe.
6. according to claim 5 natural non-magnetic iron is converted into the method for magnetite, it is characterized in that, in microwave calcining treatment process (4), this container adopts corundum material, silicon carbide or quartz material, and profile is square, rectangle or circle, and lid is arranged, open type can be ventilated.
7. the method that natural non-magnetic iron is converted into magnetite according to claim 1, it is characterized in that, this equipment is microwave, electrically heated, non-electrically heated Hybrid Heating pattern or single-mode, and its envrionment temperature is controlled at 250～600 ℃, and the reaction times remained on 3-10 minute.
8. according to claim 1 natural non-magnetic iron is converted into the method for magnetite, it is characterized in that, in magnetic separation circuit (8),
Magnetic separates a little less than at first particle being hanged down gradient, and its electromagnetic field is set to 500-800 Gauss;
To subsequent processing, the product that is about to magnetic separation acquisition dries, and has just obtained the Armco magnetic iron ore with isolated transfer of granules;
Not isolated particle is carried out the strong magnetic of high-gradient to be separated, its magnetic field is set to 1200-1500 Gauss, and to subsequent processing, the product that is about to magnetic separation acquisition dries with isolated transfer of granules, just obtained the Armco magnetic iron ore, not isolated particle has been rejected as waste.
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|---|---|---|---|
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|---|---|---|---|
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ID=44489483
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605173A (en) * | 2012-04-01 | 2012-07-25 | 昆明理工大学 | Method for producing iron ore concentrate by quickly burning siderite through microwave |
| CZ303825B6 (en) * | 2011-10-24 | 2013-05-15 | Centrum výzkumu globální zmeny AV CR, v.v.i., Ústav nanobiologie a strukturní biologie | Process for preparing magnetic composite material, magnetic composite material prepared by this process and use of such material |
| CN107775012A (en) * | 2017-11-05 | 2018-03-09 | 赵兰 | A kind of method that sintering deposit prepares titanium ferroally powder |
| CN108330273A (en) * | 2018-05-07 | 2018-07-27 | 段志松 | A kind of iron ore roasting Magnitizing method and equipment |
| CN108486362A (en) * | 2018-05-28 | 2018-09-04 | 东北大学 | It is a kind of that carbonaceous pelletizing mine, its pellet and its smelting process are prepared using bloodstone |
| CN111621637A (en) * | 2013-07-17 | 2020-09-04 | 技术资源有限公司 | Treatment of minerals |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1211628A (en) * | 1998-07-30 | 1999-03-24 | 刘启贤 | Magnetism-retained reduction calcining regime for siderite, aetite and haematite mixed iron ore |
| CN101121959A (en) * | 2007-08-30 | 2008-02-13 | 太原理工大学 | Microwave roasting dry type wind magnetic selection method for hematite powder |
-
2011
- 2011-03-01 CN CN201110048361XA patent/CN102168170A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1211628A (en) * | 1998-07-30 | 1999-03-24 | 刘启贤 | Magnetism-retained reduction calcining regime for siderite, aetite and haematite mixed iron ore |
| CN101121959A (en) * | 2007-08-30 | 2008-02-13 | 太原理工大学 | Microwave roasting dry type wind magnetic selection method for hematite powder |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ303825B6 (en) * | 2011-10-24 | 2013-05-15 | Centrum výzkumu globální zmeny AV CR, v.v.i., Ústav nanobiologie a strukturní biologie | Process for preparing magnetic composite material, magnetic composite material prepared by this process and use of such material |
| CN102605173A (en) * | 2012-04-01 | 2012-07-25 | 昆明理工大学 | Method for producing iron ore concentrate by quickly burning siderite through microwave |
| CN111621637A (en) * | 2013-07-17 | 2020-09-04 | 技术资源有限公司 | Treatment of minerals |
| CN107775012A (en) * | 2017-11-05 | 2018-03-09 | 赵兰 | A kind of method that sintering deposit prepares titanium ferroally powder |
| CN107775012B (en) * | 2017-11-05 | 2020-02-07 | 北京工业大学 | Method for preparing ferrotitanium powder from sintered ore |
| CN108330273A (en) * | 2018-05-07 | 2018-07-27 | 段志松 | A kind of iron ore roasting Magnitizing method and equipment |
| CN108486362A (en) * | 2018-05-28 | 2018-09-04 | 东北大学 | It is a kind of that carbonaceous pelletizing mine, its pellet and its smelting process are prepared using bloodstone |
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Application publication date: 20110831 |