CN100543157C - A kind of method of microwave roasting dry type wind magnetic separation of ground hematite - Google Patents
A kind of method of microwave roasting dry type wind magnetic separation of ground hematite Download PDFInfo
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- CN100543157C CN100543157C CNB200710139321XA CN200710139321A CN100543157C CN 100543157 C CN100543157 C CN 100543157C CN B200710139321X A CNB200710139321X A CN B200710139321XA CN 200710139321 A CN200710139321 A CN 200710139321A CN 100543157 C CN100543157 C CN 100543157C
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Abstract
The present invention is a kind of method of microwave roasting dry type wind magnetic separation of ground hematite, it is the deficiency at the wet type ore dressing, a kind of rotary type microwave oven roasting of adopting, the magnetic separation of dry type wind, the purification technique of preparing, it is the ground hematite that will gather, do not make under the watering condition, be equipped with pulverized anthracite, pulverize, fine grinding, sieve, mix, stir, 700 ℃ of carbon reducting roasts of microwave oven, the product powder is through cooling, fine grinding, magnetic separation, purify, finally make the iron level height, the ground hematite that purity is high, this roasting, the wind magnetic selection method is non-flushing to be washed, filter, do not waste the water source, free from environmental pollution, the ore dressing in suitable especially mining area, no water source, technical process is short, the microwave oven roasting, combined type dry type wind magnetic separator computerizeds control, liquid-crystal display, the sensor passes temperature information, it is the clean type technique of preparing, production yield rate can reach 93-95%, and iron-holder can reach＞and 71%, this beneficiation method also can be at limonite, the spathic iron ore ore dressing is used.
Description
Technical field
The present invention relates to a kind of method of microwave roasting dry type wind magnetic separation of ground hematite, belong to ferrous metal---the technical field of iron ore dressing.
Background technology
At present, China is an Iron and Steel Production big country in the world, because the melting production requirement needs a large amount of Manufacture Of Iron And Steel By Melting raw material---iron ores.
The iron ore reserves of China are than horn of plenty, distributed more widely, the use kind of iron ore has magnetite, rhombohedral iron ore, limonite, spathic iron ore etc., though China's rhombohedral iron ore, limonite, spathic iron ore quantity of exploitation at present increases day by day, but mostly grade is low, magnetic weak, disseminated grain size is thin, the symbiosis component is many, silicon-dioxide SiO
2, aluminium sesquioxide Al
2O
3Deng the foreign matter content height, because rhombohedral iron ore etc. are close with physicochemical property, density, the specific susceptibility of gangue mineral, bring very big difficulty to ore dressing, be difficult to screening and separating, because ore, gangue mix, the despecking difficulty is big, adopts conventional beneficiation method, be difficult to rhombohedral iron ore etc. is effectively separated with gangue, bring very big difficulty for the melting of iron.
In addition, ore Storage at rhombohedral iron ore, mostly be in the lack of water region, the ground hematite that is difficult to will reduce after magnetizing carries out very big wet magnetic separation of water loss or water flotation, this brings very big difficulty just for the ore dressing processing of rhombohedral iron ore, causes rhombohedral iron ore stone grade to reduce, and the cost of smelting iron ore raises, drawbacks such as the rate of tapping a blast furnace reduction, and directly influence the quality and the foreign matter content of iron after the melting.
Summary of the invention
Goal of the invention
Purpose of the present invention is exactly at disadvantages of background technology, adopt a kind of brand-new ore dressing working method, rhombohedral iron ore stone to extraction adopts microwave calcining, the magnetic separation of dry type wind to carry out ore dressing, do not use wet magnetic separation and water flotation, with the conserve water resource, increase substantially ore dressing quality and efficient, improve the quality and the iron level of ground hematite.
Technical scheme
The chemical substance material that the present invention uses is: ground hematite, pulverized anthracite, its combination matching is as follows: be measure unit with the kilogram
Ground hematite: Fe
2O
390kg ± 1kg
Pulverized anthracite: C 9kg ± 0.1kg
The weight ratio of ground hematite and pulverized anthracite is:
Ground hematite: pulverized anthracite=90:9
The preparation choosing method is as follows:
(1), selected raw chemical material
To carry out selectedly to the raw chemical material that uses, and carry out purity, content control:
Ground hematite: Fe
2O
335%
TFe content〉24%, water-content＜10%
Pulverized anthracite: carbon content〉65%, water content＜5%
(2), raw material pulverizing, fine grinding, sieve
1. to pulverize respectively, fine grinding, sieve ground hematite, pulverized anthracite with crusher, pulverize repeatedly, sieve repeatedly;
Sieve number: 80 orders
Powder diameter: 0.177mm
2. the raw material powder after pulverizing, sieving is used the dry ball fine grinding respectively, sieves respectively, and carries out fineness control;
Ground hematite: sieve number: 120 orders
Fine powder particle diameter: 0.1---0.15mm
Pulverized anthracite: sieve number: 120 orders
Fine powder particle diameter: 0.1---0.15mm
(3), batching, mixing, stirring
1. ground hematite, the pulverized anthracite to pulverizing, fine grinding, after sieving places the stainless steel barrel containers by combination matching, mixes;
2. mixed raw material fine powder is placed in the stirrer and stir, churning time is 5min ± 1min, makes to mix;
(4), microwave calcining
1. roasting is carried out in the computer-controlled microwave baking furnace of rotary type, and stoving oven is made up of body of heater, opening for feed, discharge port, motor, speed reduction unit, bearing, microwave generator, transmitter, computer control case;
2. with the ground hematite of mixing and stirring, pulverized anthracite by in the loose adding stove of opening for feed;
3. begin then to heat up, temperature rises to 700 ℃ ± 50 ℃ by 20 ℃ ± 3 ℃, at this temperature constant temperature, be incubated, leave standstill 2min ± 0.5min, carries out the carbon monoxide reducing roasting, and temperature sensor transmits temperature information, and liquid crystal display shows maturing temperature numerical value;
4. in roasting process, stoving oven carries out clockwise uniform rotation, and revolution is 2r/min;
5. discharging: stoving oven is in rotation process, and the fine powder after the roasting progresses into discharge port, and enters the product case;
6. will produce chemical reaction in the roasting process, reaction formula is as follows:
In the formula:
Fe
2O
3: ferric oxide
Fe
3O
4: Z 250
FeO: ferric oxide
CO: carbon monoxide
C: carbon
(5), cooling
Place natural air to cool off the product powder after the roasting, be cooled to 20 ℃ ± 3 ℃;
(6), fine grinding: roasting cooling back is carried out fine grinding to the product powder with ball mill, carries out repeatedly;
(7), wind magnetic separation for the first time
1. will cool off, the product powder after the fine grinding carries out magnetic separation in combined type dry type wind magnetic separator, magnetic separator is made up of magnetic separation main frame, the secondary machine of magnetic separation, separator box, hopper, blower fan, electro-magnet, discharge nozzle, controlling box;
2. will cool off, the product powder after the fine grinding places in the magnetic separation main frame separator box by hopper, opens blower fan, electro-magnet, rotation speed of fan is 1000-1600r/min, electro-magnet magneticstrength 8000-15000 Gausses;
3. nonmetallic substance enters waste bin, and metallic iron product powder enters the secondary machine of magnetic separation and proceeds magnetic separation, opens the secondary machine blower fan of magnetic separation, electro-magnet, and the blower fan revolution is 500-1000r/min, and magneticstrength is 8000-15000 Gauss, and the product powder enters the product case;
(8), fine grinding, sieve
Product powder after the magnetic separation for the first time will carry out fine grinding with pulverizing mill, and sieves, and sieve number is 325 orders;
Fine grinding is repeatedly sieved repeatedly;
The fine powder particle diameter is :≤0.043mm;
(9) wind magnetic separation, purification for the second time
Product powder after the fine grinding is carried out magnetic separation for the second time in combined type dry type wind magnetic separator, blower fan revolution, the magneticstrength of magnetic separation main frame, the secondary machine of magnetic separation are the same;
Wind magnetic separation blower fan revolution is 100-500r/min for the second time;
The magneticstrength of wind magnetic separation for the second time is 4000-10000 Gausses;
Show combined type dry type wind magnetic separator operating parameter by computer control case, liquid crystal display control;
Product powder after the magnetic separation for the second time enters product case, i.e. final product---powder shape ground hematite;
(10), detect, analyze
To detect, chemically examine, analyze the ground hematite after the magnetic separation, detect its composition, purity, color and luster, pattern, iron-holder and foreign matter content;
Carry out chemical composition analysis with spectrograph;
Carry out the iron level analysis with atomic absorption instrument;
Ground hematite powder particle diameter is :≤0.043mm;
The ground hematite iron-holder〉71%;
The impure amount of ground hematite＜15%;
Ground hematite production yield rate 93-95%;
(11), store
To be stored in drying, the clean environment with stainless steel vessel detecting qualified ground hematite, waterproof, protection against the tide, anti-oxidation, anti-soda acid to corrode 20 ℃ ± 3 ℃ of storing temps, relative humidity≤20%.
The computer-controlled microwave baking furnace of described rotary type, primary structure is made up of body of heater, stove seat, hopper, discharge port, microwave generator, transmitter, computer control electric control box, liquid crystal display, motor, speed reduction unit, bearing; Be provided with bearing support 4 on the top of body of heater 1, be bearing 15 between body of heater 1 and bearing support 4, bearing support 4 tops connect speed reduction unit 48, and speed reduction unit 48 connects body of heater 1 by linking bond 46, speed reduction unit 48 connects motor 56 by shaft coupling 47, is hopper 6 at the top of body of heater 1; The bottom of body of heater 1 is a bearing support 5, is bearing 16 between bearing support 5 and the body of heater 1, and bearing support 5 bottoms are stove seat 2, and stove seat 2 bottoms are grate 3, and body of heater 1 bottom is a discharge port 7, and the product case 17 of discharge port 7 aligned with lower is a product powder 19 in the product case 17; Be symmetrical arranged temperature sensor 11,12,13,14 on the furnace wall of body of heater 1, the top, furnace wall of body of heater 1 is provided with pore 9, and the outside of body of heater 1 is provided with microwave generator 10, and the inside of body of heater 1 is furnace chamber 8, is ground hematite 18 in the furnace chamber 8; Right part at body of heater 1 is provided with computer control electric control box 20, electric control box 20 tops are that liquid crystal display 21, bottom are provided with pilot lamp 22, motor adjusting key 53, microwave adjusting key 54, sensor adjustment key 55, power key 45 successively, electric control box 20 connects with motor 56 by lead 51, and electric control box 20 connects with microwave generator 10, temperature sensor 11,12,13,14 by lead 52.
Described combined type dry type wind magnetic separator, primary structure is made up of magnetic separation main frame, the secondary machine of magnetic separation, separator box, blower fan, hopper, electro-magnet, discharge nozzle, waste bin, product case, computer control case, liquid crystal display; On the top of magnetic separation main frame 25 the hopper 27 parallel connections machines 43 of giving a dinner for a visitor from afar, the middle part of magnetic separation main frame 25 is a separator box 26, the left part of separator box 26 is that discharge nozzle 28, right part are discharge nozzle 29, discharge nozzle 28 is aimed at waste bin 31, be provided with electro-magnet 30 in the discharge nozzle 29, discharge nozzle 29 is aimed at the hopper 33 of the secondary machine 32 of magnetic separation, hopper 33 connects blower fan 44, the secondary machine of magnetic separation 32 middle parts are separator box 34, separator box 34 left parts are that discharge nozzle 35, right part are discharge nozzle 36, in the discharge nozzle 36 is electro-magnet 24, and discharge nozzle 36 is aimed at product case 38, and discharge nozzle 35 is aimed at waste bin 37; Magnetic separation main frame 25 connects computer control case 39 by lead 49, and the secondary machine 32 of magnetic separation connects computer control case 39 by lead 50; Computer control case 39 fronts from top to bottom are liquid crystal display 40, pilot lamp 41, magnetic separation main frame adjusting key 23, the secondary machine adjusting key 42 of magnetic separation.
The mixing match of described ground hematite, pulverized anthracite is: ground hematite: pulverized anthracite=90:9.
Described microwave oven maturing temperature is 700 ℃ ± 50 ℃, and constant temperature, to be incubated, to leave standstill roasting time be 2min ± 0.5min, and in roasting process, microwave oven carries out clockwise uniform rotation, and revolution is 2r/min.
The magnetic separation of described product powder is carried out on combined type dry type wind magnetic separator, the blower fan revolution of wind magnetic separation main frame is that 1000-1600r/min, magneticstrength are 8000-15000 Gausses for the first time, the blower fan revolution of the secondary machine of magnetic separation is that 500-1000r/min, magneticstrength are 8000-15000 Gausses, blower fan revolution, the magneticstrength of the main frame of wind magnetic separation magnetic separation for the second time, the secondary machine of magnetic separation are the same, are 100-500r/min, 4000-10000 Gausses.
Beneficial effect
The present invention compares with background technology has tangible advance, it is the deficiency at the wet type ore dressing, a kind of microwave roasting dry type wind magnetic separation purification technique of preparing that adopts, the ground hematite of gathering is carried out under anhydrous condition, preferred through raw material, be equipped with pulverized anthracite, pulverize, fine grinding, sieve, mix and stir, 700 ℃ of reducing roastings of microwave oven, the magnetic separation of dry type wind, the product powder is through cooling, fine grinding, magnetic separation, purify, finally make highly purified ground hematite, this roasting, magnetic selection method does not make the water flushing, filter, do not waste the water source, free from environmental pollution, the ore dressing in suitable especially mining area, no water source, this method technical process is short, cost is low, the production yield rate height, the microwave oven roasting, combined type dry type wind magnetic separator computerizeds control, liquid-crystal display, the sensor passes temperature information is the clean type technique of preparing, production yield rate can reach 93-95%, iron-holder〉71%, foreign matter content＜15%, product powder diameter≤0.043mm, this beneficiation method also can be at limonite, the spathic iron ore ore dressing is used, and this method has been filled up the scientific research blank of this type of technique of preparing.
Description of drawings
Fig. 1 is preparation technology's schema
Fig. 2 is rotary type microwave baking furnace and roasting state graph
Fig. 3 is combined type dry type wind magnetic separator and magnetic separation state graph
Fig. 4 is a material phase analysis table after the ground hematite roasting
Fig. 5 is a material phase analysis table after the magnetic separation of ground hematite dry type wind
Fig. 6 is product powder morphology figure
Shown in the figure, list of numerals is as follows:
1, body of heater, 2, the stove seat, 3, grate, 4, bearing support, 5, bearing support, 6, hopper, 7, discharge port, 8, furnace chamber, 9, pore, 10, microwave generator, 11, temperature sensor, 12, temperature sensor, 13, temperature sensor, 14, temperature sensor, 15, bearing, 16, bearing, 17, the product case, 18, ground hematite, 19, the product powder, 20, electric control box, 21, liquid crystal display, 22, pilot lamp, 23, magnetic separation main frame adjusting key, 24, electro-magnet, 25, the magnetic separation main frame, 26, separator box, 27, hopper, 28, discharge nozzle, 29, discharge nozzle, 30, electro-magnet, 31, waste bin, 32, the secondary machine of magnetic separation, 33, hopper, 34, separator box, 35, discharge nozzle, 36, discharge nozzle, 37, waste bin, 38, the product case, 39, controlling box, 40, liquid crystal display, 41, pilot lamp, 42, the secondary machine adjusting key of magnetic separation, 43, blower fan, 44, blower fan, 45, power key, 46, linking bond, 47, shaft coupling, 48, speed reduction unit, 49, lead, 50, lead, 51, lead, 52, lead, 53, the motor adjusting key, 54, the microwave adjusting key, 55, the sensor adjustment key, 56, motor.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
Shown in Figure 1, be preparation technology's schema, be the whole process of the roasting of ground hematite microwave oven, magnetic separation, begin to store from raw material to warehouse-in, strict follow procedure operation.
Raw chemical material ground hematite, the pulverized anthracite that preparation is used is to determine by the amount ratio that sets in advance, and can calculate in this ratio.
The ground hematite ferric oxide Fe that preparation is used
2 O
335%, ferrous TFe content〉24%, foreign matter content＜15% is removed impurity in microwave oven roasting, wind magnetic separation purification process.
The pulverizing of raw material, fine grinding, sieve and to carry out with pulverizing mill respectively, control fine powder particle diameter 0.1-0.15mm and mixing and stirring well.
The mixed roasting of raw material is the carbon monoxide reduction process, carries out in microwave baking furnace, and maturing temperature is at 700 ℃ ± 50 ℃, roasting 2min ± 0.5min, product powder after the roasting is expelled to the product case by discharge port automatically, will produce chemical reaction in roasting process, and chemical equation is as follows:
In natural air, be cooled to 20 ℃ ± 3 ℃ after the roasting, carry out magnetic separation then and purify.
Magnetic separation is purified and is carried out on combined type dry type wind magnetic separator, and show by computer control, earlier carry out the magnetic separation of wind formula at the magnetic separation main frame, and then change the secondary machine of magnetic separation automatically over to and carry out magnetic separation, again through fine grinding, sieve, fine grinding again, after sieve, and then change combined type dry type wind magnetic separator over to, carrying out magnetic separation once more purifies, magnetic separation promptly obtains final product---hematite powder after purifying, product powder iron-holder can reach〉71%, production yield rate can reach 93-95%, and product is the powder shape, powder diameter≤0.043mm.
Shown in Figure 2, the rotary type microwave baking furnace, it is the microwave baking furnace of computer control, liquid-crystal display, sensor passes temperature information, be provided with bearing support 4,5 in the upper and lower part of body of heater 1, body of heater 1 can whole fixing uniform rotation down at metal ( upper seat 4,5, bearing 15,16, and velocity of rotation is 2 commentariess on classics/min, bearing support 4 connection speed reduction units 48, shaft coupling 47, and connect with motor 56, motor 56 drives bodies of heater 1 and rotates; The roasting under rotating of ground hematite 18 in the furnace chamber 8 enters product case 17 by discharge port 7 after the roasting; Pore 9 can guarantee stove internal gas pressure balance, so that roasting safety, this rotary type stoving oven can be by the computer realization time variable control.
Shown in Figure 3, be combined type dry type wind magnetic separator structure iron, 32 fens upper and lower settings of magnetic separation main frame 25 and the secondary machine of magnetic separation can change the secondary machine 32 of magnetic separation automatically over to after 25 magnetic separation of magnetic separation main frame.
Control the blower fan revolution of major and minor machine well, can not cross exceed low, in order to avoid influence the magnetic separation effect.
Electro- magnet 30,24 will be controlled Gauss's amount of magneticstrength well, is advisable with 8000-15000,4000-10000 Gausses, and also visual magnetic separation quantity is adjusted, but must not be low excessively, in order to avoid influence magnetic separation effect and production yield rate.
Combined type dry type wind magnetic separator is computer program control, and liquid crystal display shows the magnetic separation data, adjust magnetic separation adjusting key 23,42 and data.
Shown in Figure 4, be ground hematite roasting after product material phase analysis table, in the table as can be known: Armco magnetic iron is 73.64%, iron carbonate is 4.2%, ferric metasilicate is 1.35%, russet iron is 20.56%, iron sulphide is 0.25%.
Shown in Figure 5, be ground hematite dry type wind magnetic separation purification after product material phase analysis table, in the table as can be known: Armco magnetic iron is 87.4%, iron carbonate is 0.13%, ferric metasilicate is 1.39%, russet iron is 10.8%, iron sulphide is 0.28%, and the Armco magnetic iron per-cent after the wind magnetic separation is higher than the Armco magnetic iron per-cent after the roasting.
Shown in Figure 6, be product powder morphology figure, among the figure as can be known: the single powder pattern of product is irregular grain of rice shape.
Claims (7)
1, a kind of method of microwave roasting dry type wind magnetic separation of ground hematite is characterized in that: the chemical substance material of use is: ground hematite and pulverized anthracite, its combination matching is as follows: be measure unit with the kilogram
Ground hematite: Fe
2O
390kg ± 1kg
Pulverized anthracite: C 9kg ± 0.1kg
The weight ratio of ground hematite and pulverized anthracite is:
Ground hematite: pulverized anthracite=90:9
The preparation choosing method is as follows:
(1), selected raw chemical material
To carry out selectedly to the raw chemical material that uses, and carry out purity and content control:
Ground hematite: Fe
2O
335%
TFe content〉24%, water-content＜10%
Pulverized anthracite: carbon content〉65%, water content＜5%
(2), raw material pulverizing, fine grinding and sieve
1. will with crusher to ground hematite and pulverized anthracite pulverize respectively, fine grinding and sieving, pulverize repeatedly, sieve repeatedly;
Sieve number: 80 orders
Powder diameter: 0.177mm
2. pulverize and sieve after raw material powder use the dry ball fine grinding respectively, sieve respectively, and carry out fineness control;
Ground hematite: sieve number: 120 orders
Fine powder particle diameter: 0.1---0.15mm
Pulverized anthracite: sieve number: 120 orders
Fine powder particle diameter: 0.1---0.15mm
(3), batching, mixing and stirring
1. to pulverizing, fine grinding and the ground hematite after sieving and pulverized anthracite place the stainless steel barrel containers by combination matching, mix;
2. mixed raw material fine powder is placed in the stirrer and stir, churning time is 5min ± 1min, makes to mix;
(4), microwave calcining
1. roasting is carried out in the computer-controlled microwave baking furnace of rotary type, and stoving oven is made up of body of heater, opening for feed, discharge port, motor, speed reduction unit, bearing, microwave generator, transmitter and computer control case;
2. with the ground hematite of mixing and stirring and pulverized anthracite by in the loose adding stove of opening for feed;
3. begin then to heat up, temperature rises to 700 ℃ ± 50 ℃ by 20 ℃ ± 3 ℃, at this temperature constant temperature, be incubated and leave standstill 2min ± 0.5min, carries out the carbon monoxide reducing roasting, and temperature sensor transmits temperature information, and liquid crystal display shows maturing temperature numerical value;
4. in roasting process, stoving oven carries out clockwise uniform rotation, and revolution is 2r/min;
5. discharging: stoving oven is in rotation process, and the fine powder after the roasting progresses into discharge port, and enters the product case;
6. will produce chemical reaction in the roasting process, reaction formula is as follows:
In the formula:
Fe
2O
3: ferric oxide
Fe
3O
4: Z 250
FeO: iron protoxide
CO: carbon monoxide
C: carbon
(5), cooling
Place natural air to cool off the product powder after the roasting, be cooled to 20 ℃ ± 3 ℃;
(6), fine grinding: roasting cooling back is carried out fine grinding to the product powder with ball mill, carries out repeatedly;
(7), wind magnetic separation for the first time
1. will cool off and fine grinding after product powder in combined type dry type wind magnetic separator, carry out magnetic separation, magnetic separator is made up of the secondary machine of magnetic separation main frame, magnetic separation, separator box, hopper, blower fan, electro-magnet, discharge nozzle and controlling box;
2. will cool off and fine grinding after product powder place in the magnetic separation main frame separator box by hopper, open blower fan and electro-magnet, rotation speed of fan is 1000-1600r/min, electro-magnet magneticstrength 8000-15000 Gausses;
3. nonmetallic substance enters waste bin, and metallic iron product powder enters the secondary machine of magnetic separation and proceeds magnetic separation, opens secondary machine blower fan of magnetic separation and electro-magnet, and the blower fan revolution is 500-1000r/min, and magneticstrength is 8000-15000 Gauss, and the product powder enters the product case;
(8), fine grinding and sieving
Product powder after the magnetic separation for the first time will carry out fine grinding with pulverizing mill, and sieves, and sieve number is 325 orders;
Fine grinding is repeatedly sieved repeatedly;
The fine powder particle diameter is :≤0.043mm;
(9) wind magnetic separation for the second time and purification
Product powder after the fine grinding is carried out magnetic separation for the second time in combined type dry type wind magnetic separator, the magnetic separation main frame is the same with the blower fan revolution and the magneticstrength of the secondary machine of magnetic separation;
Wind magnetic separation blower fan revolution is 100-500r/min for the second time;
The magneticstrength of wind magnetic separation for the second time is 4000-10000 Gausses;
Show combined type dry type wind magnetic separator operating parameter by computer control case and liquid crystal display control;
Product powder after the magnetic separation for the second time enters product case, i.e. final product---powder shape ground hematite;
(10), detect and analyze
To detect, chemically examine and analyze the ground hematite after the magnetic separation, detect its composition, purity, color and luster, pattern and iron-holder and foreign matter content;
Carry out chemical composition analysis with spectrograph;
Carry out the iron level analysis with atomic absorption instrument;
Ground hematite powder particle diameter is :≤0.043mm;
The ground hematite iron-holder〉71%;
The impure amount of ground hematite＜15%;
Ground hematite production yield rate 93-95%;
(11), store
To be stored in dry and the clean environment with stainless steel vessel detecting qualified ground hematite, waterproof, protection against the tide, anti-oxidation and anti-soda acid to corrode 20 ℃ ± 3 ℃ of storing temps, relative humidity≤20%.
2, the method for the microwave roasting dry type wind magnetic separation of a kind of ground hematite according to claim 1, it is characterized in that: the computer-controlled microwave baking furnace of described rotary type, primary structure is made up of body of heater, stove seat, hopper, discharge port, microwave generator, transmitter, computer control electric control box, liquid crystal display, motor, speed reduction unit and bearing; Be provided with clutch shaft bearing seat (4) on the top of body of heater (1), between body of heater (1) and clutch shaft bearing seat (4), be clutch shaft bearing (15), clutch shaft bearing seat (4) top connects speed reduction unit (48), speed reduction unit (48) connects body of heater (1) by linking bond (46), speed reduction unit (48) connects motor (56) by shaft coupling (47), is hopper at the top of body of heater (1); The bottom of body of heater (1) is second bearing support (5), be second bearing (16) between second bearing support (5) and the body of heater (1), second bearing support (5) bottom is stove seat (2), stove seat (2) bottom is grate (3), body of heater (1) bottom is discharge port (7), in the product case (17) of discharge port (7) aligned with lower, product case (17) is product powder (19); Be symmetrical arranged temperature sensor (11,12,13,14) on the furnace wall of body of heater (1), the top, furnace wall of body of heater (1) is provided with pore (9), be provided with microwave generator (10) in the outside of body of heater (1), the inside of body of heater (1) is furnace chamber (8), is ground hematite (18) in the furnace chamber (8); Right part at body of heater (1) is provided with computer control electric control box (20), electric control box (20) top is that liquid crystal display (21), bottom are provided with pilot lamp (22), motor adjusting key (53), microwave adjusting key (54), sensor adjustment key (55) and power key (45) successively, electric control box (20) connects with motor (56) by lead, and electric control box (20) connects with microwave generator (10) and temperature sensor (11,12,13,14) by lead.
3, the method for the microwave roasting dry type wind magnetic separation of a kind of ground hematite according to claim 1, it is characterized in that: described combined type wind magnetic separator, primary structure is made up of magnetic separation main frame, the secondary machine of magnetic separation, separator box, blower fan, hopper, electro-magnet, discharge nozzle, waste bin, product case, computer control case and liquid crystal display; Be hopper (27) on the top of magnetic separation main frame (25) and connect first blower fan (43), the middle part of magnetic separation main frame (25) is first separator box (26), the left part of first separator box (26) is first discharge nozzle (28), right part is second discharge nozzle (29), first discharge nozzle (28) is aimed at waste bin (31), be provided with first electro-magnet (30) in second discharge nozzle (29), second discharge nozzle (29) is aimed at the hopper of the secondary machine of magnetic separation (32), hopper connects second blower fan (44), the secondary machine of magnetic separation (32) middle part is second separator box (34), second separator box (34) left part is the 3rd discharge nozzle (35), right part is the 4th discharge nozzle (36), in the 4th discharge nozzle (36) second electro-magnet (24), the 4th discharge nozzle (36) is aimed at product case (38), and the 3rd discharge nozzle (35) is aimed at waste bin (37); Magnetic separation main frame (25) connects computer control case (39) by lead, and the secondary machine of magnetic separation (32) connects computer control case (39) by lead; Computer control case (39) front from top to bottom is the secondary machine adjusting key (42) of liquid crystal display (40), pilot lamp (41), magnetic separation main frame adjusting key (23) and magnetic separation.
4, the method for the microwave roasting dry type wind magnetic separation of a kind of ground hematite according to claim 1, it is characterized in that: the mixing match of described ground hematite and pulverized anthracite is: ground hematite: pulverized anthracite=90:9.
5, the method for the microwave roasting dry type wind magnetic separation of a kind of ground hematite according to claim 1, it is characterized in that: described microwave oven maturing temperature is 700 ℃ ± 50 ℃, constant temperature, to be incubated and to leave standstill roasting time be 2min ± 0.5min, in roasting process, microwave oven carries out clockwise uniform rotation, and revolution is 2r/min.
6, the method of the microwave roasting dry type wind magnetic separation of a kind of ground hematite according to claim 1, it is characterized in that: the magnetic separation of described product powder is carried out on combined type dry type wind magnetic separator, the blower fan revolution of wind magnetic separation main frame is 1000-1600r/min for the first time, magneticstrength is 8000-15000 Gausses, the blower fan revolution of the secondary machine of magnetic separation is 500-1000r/min, magneticstrength is 8000-15000 Gausses, the main frame of wind magnetic separation magnetic separation for the second time is the same with the blower fan revolution and the magneticstrength of the secondary machine of magnetic separation, is 100-500r/min, 4000-10000 Gausses.
7, the method for the microwave roasting dry type wind magnetic separation of a kind of ground hematite according to claim 1 is characterized in that: the product powder diameter of ground hematite is≤0.043mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710139321XA CN100543157C (en) | 2007-08-30 | 2007-08-30 | A kind of method of microwave roasting dry type wind magnetic separation of ground hematite |
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| CNB200710139321XA CN100543157C (en) | 2007-08-30 | 2007-08-30 | A kind of method of microwave roasting dry type wind magnetic separation of ground hematite |
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| CN100543157C true CN100543157C (en) | 2009-09-23 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102168170A (en) * | 2011-03-01 | 2011-08-31 | 上海麦风微波设备有限公司 | Method for converting natural non-magnetic iron ore into magnetite |
| CN102212677A (en) * | 2011-04-28 | 2011-10-12 | 昆明理工大学 | Method for sorting high-phosphorus iron ore by combining microwave reduction roasting and low intensity magnetic separation |
| CN102268536B (en) * | 2011-08-17 | 2013-03-20 | 梁玉麟 | Rapid reduction roasting furnace for red mud and roasting method suitable for same |
| CN103084266B (en) * | 2011-10-28 | 2016-05-18 | 鞍山钢铁集团公司矿渣开发公司 | A kind of production method of smelting steel tailings miropowder and device |
| 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 |
| CN102828021B (en) * | 2012-09-24 | 2014-12-03 | 重庆大学 | Phosphosiderite microwave coupling dephosphorization method |
| CN102978380A (en) * | 2012-12-06 | 2013-03-20 | 内蒙古科技大学 | Method for producing iron ore concentrate by microwave roasting of limonite and gas mud |
| JP5622061B2 (en) * | 2013-03-26 | 2014-11-12 | 住友金属鉱山株式会社 | Method for producing hematite for iron making |
| CN103447148B (en) * | 2013-08-08 | 2016-02-17 | 内蒙古科技大学 | Microwave reduction is utilized to contain concentration equipment and the magnetic selection method of bloodstone material |
| CN109821650A (en) * | 2019-02-15 | 2019-05-31 | 河北钢铁集团矿业有限公司 | A kind of high silicon bloodstone tailing treatment technology |
| CN111362538B (en) * | 2020-03-20 | 2022-01-28 | 贵州正业工程技术投资有限公司 | Method for continuously dealkalizing red mud |
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