CN101463420B - Method and apparatus for enriching low grade siderite - Google Patents
Method and apparatus for enriching low grade siderite Download PDFInfo
- Publication number
- CN101463420B CN101463420B CN2008101951314A CN200810195131A CN101463420B CN 101463420 B CN101463420 B CN 101463420B CN 2008101951314 A CN2008101951314 A CN 2008101951314A CN 200810195131 A CN200810195131 A CN 200810195131A CN 101463420 B CN101463420 B CN 101463420B
- Authority
- CN
- China
- Prior art keywords
- kiln
- roasting
- kiln body
- grade
- magnetic separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an enrichment method of low-grade siderite ore and a device thereof. The enrichment method comprises the following processes: a) coarse crushing process; b) fine crushing process; c) evenly mixing process; d) roasting process; e) milling process; f) classification process; g) coarse magnetic dressing process; h) fine magnetic dressing process; and i) reselection process. Compared with the prior art, the grade of iron concentrate which is produced by roasting the original low-grade siderite is 60-70 percent. The iron recovery rate is 75-85 percent. A roasting kiln has the characteristics of simple operation, uniform burden distribution, smooth ventilation, stable primer, stable running, continuous and fast discharging, energy conservation and environmental protection, etc.
Description
Technical field
The invention belongs to the enriching method and the device of iron ore of low ore grade, belong to the enriching method and the device of low-grade siderite especially.
Background technology
Domestic low-grade spathic iron ore, with the method for General Physics ore dressing, iron ore concentrate stone grade is difficult to improve, and particularly limonite ore is in fragmentation and grinding process, and the argillization phenomenon is serious, and the metal recovery rate during sorting is low, is no more than 60% usually.
Summary of the invention
Technical problem to be solved by this invention provides the enriching method of low-grade siderite.
The technical scheme of technical solution problem of the present invention is: the enriching method of low-grade siderite comprises following operation: a) coarse crushing operation; B) fine crushing process; C) mixing operation; D) calcining process; E) ball milling operation; F) classification operation; G) thick magnetic separation operation; H) smart magnetic separation operation; I) gravity treatment operation, in the described mixing operation, the iron ore that fine crushing process is crushed mixes for coal dust, water less than 13mm with granularity, and the weight ratio of iron ore, coal dust, water is 100:5-8:8-10.
In order to improve the grade of siderite, also can in mixed processes, add catalyzer, described catalyzer is a kind of or several a mixture of Industrial Salt, caustic soda or unslaked lime, the weight ratio of catalyzer and iron ore is 1000:3-5.
In the described calcining process, roasting kiln is divided into four bands, from being respectively preheating zone, roasting band, cooling zone at the bottom of kiln pushes up kiln, unloading strip,
Described preheating zone temperature is 100-150 ℃.
Described roasting band temperature is 300-450 ℃.
Described cooling zone temperature is 150-200 ℃.
The described temperature of strip of unloading is less than 100-150 ℃.
Four band required times are set according to mineralogical property and crystal water content.
Preheating zone, roasting band, cooling zone, the aspect ratio of unloading strip are decided according to ore character.
Preferred roasting band temperature is 300-400 ℃.
Described coal dust is the anthracitic standard coal of Jincheng, Shanxi, fat coal, special excellent coal, ash content in the coal dust (ad) weight concentration is 13-21%, the weight concentration of full moisture content (Mt) is smaller or equal to 8%, full sulphur (St) weight concentration is less than 1%, volatile matter Vdaf weight concentration is 6-8%, fired basis net calorific value 5700-6500kcar/kg.
In the described thick magnetic separation operation, magneticstrength is 2000-3500Oe.
In the described smart magnetic separation operation, magneticstrength is 1000-1500Oe.
In the described gravity treatment operation, gravity table is a coarse sand cutting shaking table, and riffling is the 60-120 bar.
According to the clean level of ore, also can be at b) fine crushing process and c) increase between the mixing operation and clean operation, with the foreign material in the lash.
The present invention can be with existing vertical roasting kiln, but preferably following vertical roasting kiln.
Described vertical roasting kiln is by the kiln body, be positioned at the kiln hood at kiln body top, material-feeding mechanism, be positioned at the drawing mechanism of kiln body lower lumen, one end of kiln hood and the top of kiln body link, material-feeding mechanism is positioned at the kiln hood the other end, and the axis of the axis of hopper and kiln body coincides in the material-feeding mechanism, with discharging mechanism in the corresponding kiln body wall of umbrella tooth in be provided with circulating water cooling device, so that the good ore of roasting is quenched to 150-200 ℃, the ore that cooling is good is transported to ball mill through discharging mechanism and mills.
Described discharging mechanism is the level electricity discharging machine that shakes.
In order to make the roasting kiln even heating, obtain the effect of even roasting, be provided with the waist airduct at the roasting band of kiln body, waist wind radially passes the roasting band along the kiln body.
To uniform, its quantity is 4-8 to described waist airduct along the diameter of axle of kiln body.
In order to make the better effects if of roasting, the described kiln body that is positioned at roasting band position is the kiln body of reducing.
For the ease of control kiln intravital temperature, be provided with thermocouple well at each band of kiln body, directly show kiln temperature by electronic console, can recognize the problem in the kiln at any time, to guarantee not burning, underburnt not
Broken breeze is with after coal dust, water mix among the present invention, enter hopper and spreading scraper-trough conveyer in the cloth part, evenly be distributed in the kiln body, through the hot gas flow preheating, along with stock column moves down, raw material carry out roasting from the appearance to the center, up to the magnetization temperature, form grog, grog cools off at cooling zone, and cooled grog is transported to ball mill through discharging mechanism.
Redox reaction has taken place in material in kiln, its reaction formula is:
3FeCO
3→Fe3O
4+2CO
2↑+CO↑
The present invention compared with prior art, with making iron concentrate grade after former low-grade spathic iron ore roasting is 60-70%, iron recovery is 75-85%, simple to operate, characteristics such as cloth even, it is smooth and easy to ventilate, the fire in a stove before fuel is added stable, the running steady, discharging is continuous fast, energy-conserving and environment-protective that roasting kiln has.
Description of drawings
Fig. 1 is the preferred roasting kiln structural representation of the present invention.
In Fig. 1,1 is that material-feeding mechanism, 2 is that kiln hood, 3 is that kiln body, 4 is the umbrella tooth, and 5 is circulating water cooling device, 6 is ventilator trunk, 7 is discharging mechanism, and 9 is that waist airduct, 11 is the spreading scraper-trough conveyer, and 31 is that preheating zone, 32 is that roasting band, 33 is that cooling zone, 34 is for unloading strip.
Embodiment
Below in conjunction with embodiment the present invention is done detailed explanation.
Embodiment 1:
The TFe grade of described siderite is 38%, SiO
2Weight content be 14%, crystal water is 2.3%.
The enriching method of described siderite comprises following operation: a) coarse crushing operation; B) fine crushing process; C) mixing operation; D) calcining process; E) ball milling operation; F) classification operation; G) thick magnetic separation operation; H) smart magnetic separation operation; I) gravity treatment operation:
At c) in the mixing operation: the siderite that fine crushing process is crushed mixes for coal dust, water less than 13mm with granularity, and the weight ratio of iron ore, coal dust, water is 100:5:8.
Described coal dust is that ash content (ad) weight concentration in the anthracitic standard coal of Jincheng, Shanxi, the coal dust is 13-21%, the weight concentration of full moisture content (Mt) is smaller or equal to 8%, full sulphur (St) weight concentration is less than 1%, volatile matter Vdaf weight concentration is 6-8%, fired basis net calorific value 5700-6500kcar/kg.
At d) in the calcining process, used vertical roasting kiln as shown in Figure 1, described vertical roasting kiln is by kiln body 3, be positioned at the kiln hood 2 at kiln body 3 tops, material-feeding mechanism 1, be positioned at the drawing mechanism 7 of kiln body 3 lower lumen, one end of kiln hood 2 and the top of kiln body 3 link, material-feeding mechanism 1 is positioned at kiln hood 2 the other ends, the axis of the axis of hopper and kiln body 3 coincides in the material-feeding mechanism 1, with discharging mechanism 7 in umbrella tooth 4 corresponding kiln body walls in be provided with circulating water cooling device 5, so that the good ore of roasting is quenched to 150-200 ℃, the ore that cooling is good is transported to ball mill through discharging mechanism 7 and mills.
Described discharging mechanism 7 is the level electricity discharging machine that shakes.
In order to make the roasting kiln even heating, obtain the effect of even roasting, be provided with waist airduct 9 at the roasting band 32 of kiln body, waist wind radially passes roasting band 32 along kiln body 2.
To uniform, its quantity is 8 to described waist airduct 9 along the diameter of axle of kiln body 2.
In order to make the better effects if of roasting, the described kiln body 2 that is positioned at roasting band 32 positions is the kiln body 2 of reducing.
For the ease of the intravital temperature of control kiln, in kiln body preheating zone 31, roasting band 32, cooling zone 33, go out in the strip 34 to be provided with thermocouple well, directly show temperature of each band in the kiln by electronic console, can recognize the problem in the kiln at any time, to guarantee not burning, underburnt not.
In the described calcining process, roasting kiln is divided into four bands, and from being respectively preheating zone, roasting band, cooling zone at the bottom of kiln pushes up kiln, unloading strip, its aspect ratio is set according to mineralogical property.
Described preheating zone temperature is 150 ℃.
Described roasting band temperature is 380 ℃.
Described cooling zone temperature is 200 ℃.
The described temperature of strip of unloading is less than 150 ℃.
The time of four bands is specially the preheating zone 60 minutes, roasting band 60 minutes, cooling zone 60 minutes, unloaded strip 60 minutes.
G) thick magnetic separation operation: magneticstrength is 3500 Oe.
H) smart magnetic separation operation: in the described smart magnetic separation operation, magneticstrength is 2500 Oe.
I) gravity treatment operation: gravity table is a coarse sand cutting shaking table, and riffling is 60.
The TFe grade of the smart powder of iron that embodiment 1 is made is 63.4%, and iron recovery is 81.7%.
Embodiment 2:
The TFe grade of described spathic iron ore ore is 42.6%, SiO
2Weight content be 12.4%, crystal water is 1.8%.
The enriching method of described siderite comprises following operation: a) coarse crushing operation; B) fine crushing process; C) mixing operation; D) calcining process; E) ball milling operation; F) classification operation; G) thick magnetic separation operation; H) smart magnetic separation operation; I) gravity treatment operation:
At c) in the mixing operation: the siderite that fine crushing process is crushed mixes for coal dust, water less than 13mm with granularity, and the weight ratio of iron ore, coal dust, water is 100:7:9.
Described coal dust is that ash content (ad) weight concentration in the anthracitic standard coal of Jincheng, Shanxi, the coal dust is 13-21%, the weight concentration of full moisture content (Mt) is smaller or equal to 8%, full sulphur (St) weight concentration is less than 1%, volatile matter Vdaf weight concentration is 6-8%, fired basis net calorific value 5700-6500kcar/kg.
Described d) in the calcining process, roasting kiln is divided into four bands, and from being respectively preheating zone, roasting band, cooling zone at the bottom of kiln pushes up kiln, unloading strip, its aspect ratio is set according to mineralogical property.
Described preheating zone temperature is 150 ℃.
Described roasting band temperature is 400 ℃.
Described cooling zone temperature is 200 ℃.
The described temperature of strip of unloading is less than 150 ℃.
The time of four bands is specially the preheating zone 60 minutes, roasting band 60 minutes, cooling zone 60 minutes, unloaded strip 60 minutes.
G) thick magnetic separation operation: magneticstrength is 3500 Oe.
H) smart magnetic separation operation: in the described smart magnetic separation operation, magneticstrength is 2500 Oe.
I) gravity treatment operation: gravity table is a coarse sand cutting shaking table, and riffling is 120.
The TFe grade of the smart powder of iron that embodiment 2 is made is 65.8%, and iron recovery is 82.6%.
Embodiment 3:
The TFe grade of described spathic iron ore ore is 36.9%, SiO
2Weight content be 14.5%, crystal water is 3.1%.
The enriching method of described siderite comprises following operation: a) coarse crushing operation; B) fine crushing process; C) mixing operation; D) calcining process; E) ball milling operation; F) classification operation; G) thick magnetic separation operation; H) smart magnetic separation operation; I) gravity treatment operation:
At c) in the mixing operation: the siderite that fine crushing process is crushed mixes for coal dust, water less than 13mm with granularity, and the weight ratio of iron ore, coal dust, water is 10:1:1.
Described coal dust is that ash content (ad) weight concentration in the anthracitic standard coal of Jincheng, Shanxi, the coal dust is 13-21%, the weight concentration of full moisture content (Mt) is smaller or equal to 8%, full sulphur (St) weight concentration is less than 1%, volatile matter Vdaf weight concentration is 6-8%, fired basis net calorific value 5700-6500kcar/kg.
Described d) in the calcining process, roasting kiln is divided into four bands, and from being respectively preheating zone, roasting band, cooling zone at the bottom of kiln pushes up kiln, unloading strip, its aspect ratio is set according to mineralogical property.
Described preheating zone temperature is 150 ℃.
Described roasting band temperature is 420 ℃.
Described cooling zone temperature is 200 ℃.
The described temperature of strip of unloading is less than 150 ℃.
The time of four bands is specially the preheating zone 60 minutes, roasting band 60 minutes, cooling zone 60 minutes, unloaded strip 60 minutes.
G) thick magnetic separation operation: magneticstrength is 3500 Oe.
H) smart magnetic separation operation: in the described smart magnetic separation operation, magneticstrength is 2500 Oe.
I) gravity treatment operation: gravity table is a coarse sand cutting shaking table, and riffling is 80.
The TFe grade of the smart powder of iron that embodiment 3 is made is 65.4%, and iron recovery is 81.2.
Embodiment 4:
Remove to add Industrial Salt in iron ore, the weight ratio of itself and iron ore is outside the 1000:3, and all the other are identical with embodiment 1.
The TFe grade of the smart powder of iron that embodiment 4 is made is 61.8%, and iron recovery is 80.9%.
Embodiment 5:
Remove the mixture that adds Industrial Salt and caustic soda in iron ore, the weight ratio of Industrial Salt and caustic soda is 1:1, and the weight ratio of mixture and iron ore is outside the 1000:4, and all the other are identical with embodiment 1.
The TFe grade of the smart powder of iron that embodiment 5 is made is 66.8%, and iron recovery is 84.6%.
Embodiment 6:
Remove the mixture that adds Industrial Salt, caustic soda and unslaked lime in iron ore, the weight ratio of Industrial Salt, caustic soda, unslaked lime is 1:1:1, and the weight ratio of mixture and iron ore is outside the 1000:5, and all the other are identical with embodiment 1.
The TFe grade of the smart powder of iron that embodiment 6 is made is 67.1%, and iron recovery is 85.1%.
Claims (6)
1. the enriching method of low-grade siderite comprises following operation: a) coarse crushing operation; B) fine crushing process; C) mixing operation; D) calcining process; E) ball milling operation; F) classification operation; G) thick magnetic separation operation; H) smart magnetic separation operation; I) gravity treatment operation,
It is characterized in that: in the described mixing operation, the iron ore that fine crushing process is crushed mixes with coal dust, water, and the weight ratio of iron ore, coal dust, water is 100: 5-8: 8-10;
Add catalyzer in mixed processes, described catalyzer is a kind of or several a mixture of Industrial Salt, caustic soda or unslaked lime, and the weight ratio of catalyzer and iron ore is 1000: 3-5;
In the described calcining process, roasting kiln is divided into four bands, from being respectively preheating zone, roasting band, cooling zone at the bottom of kiln pushes up kiln, unloading strip,
Described preheating zone temperature is 100-150 ℃;
Described roasting band temperature is 300-450 ℃;
Described cooling zone temperature is 150-200 ℃;
The described temperature of strip of unloading is less than 150 ℃;
In the described thick magnetic separation operation, magneticstrength is 2000-3500Oe;
In the described smart magnetic separation operation, magneticstrength is 1000-1500Oe.
2. the enriching method of low-grade siderite according to claim 1, it is characterized in that: described roasting band temperature is 300-400 ℃.
3. the enriching method of low-grade siderite according to claim 1, it is characterized in that: in the described gravity treatment operation, gravity table is a coarse sand cutting shaking table, and riffling is the 60-120 bar.
4. the enriching method of low-grade siderite according to claim 1 and 2 is characterized in that: at b) fine crushing process and c) increase between the mixing operation and clean operation.
5. the vertical roasting kiln that is used for claim 1 calcining process, described vertical roasting kiln is by kiln body (3), be positioned at the kiln hood (2) at kiln body top, material-feeding mechanism (1), the drawing mechanism (7) that is positioned at kiln body (3) lower lumen is formed, the top of one end of kiln hood (2) and kiln body (3) links, material-feeding mechanism (1) is positioned at kiln hood (2) the other end, the axis of hopper and the axis of kiln body (3) coincide in the material-feeding mechanism (1), with drawing mechanism (7) in corresponding kiln body (3) wall of umbrella tooth (4) in be provided with circulating water cooling device, so that the good ore of roasting is quenched to 150-200 ℃, the ore that cooling is good is transported to ball mill through drawing mechanism (7) and mills, it is characterized in that: the roasting band (32) at kiln body (3) is provided with waist airduct (9), and waist wind radially passes roasting band (32) along the kiln body.
6. vertical roasting kiln according to claim 5 is characterized in that: the kiln body (3) that is positioned at roasting band position is the kiln body of reducing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101951314A CN101463420B (en) | 2008-10-30 | 2008-10-30 | Method and apparatus for enriching low grade siderite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101951314A CN101463420B (en) | 2008-10-30 | 2008-10-30 | Method and apparatus for enriching low grade siderite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101463420A CN101463420A (en) | 2009-06-24 |
| CN101463420B true CN101463420B (en) | 2011-03-30 |
Family
ID=40804211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101951314A Expired - Fee Related CN101463420B (en) | 2008-10-30 | 2008-10-30 | Method and apparatus for enriching low grade siderite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101463420B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914675A (en) * | 2010-08-31 | 2010-12-15 | 马鞍山钢铁股份有限公司 | Method for developing and utilizing spathic iron ore |
| CN103305650B (en) * | 2013-06-25 | 2014-12-24 | 中南大学 | Efficient comprehensive utilization method of siderite resource |
| CN103614546B (en) * | 2013-11-25 | 2015-12-02 | 昆明钢铁集团有限责任公司 | A kind of spathic iron ore magnetizing roasting method and device thereof and application |
| CN105018720B (en) * | 2015-07-07 | 2017-11-24 | 青岛智邦炉窑设计研究有限公司 | A kind of Coal powder spray mineral calciner and technique |
| RU2018136337A (en) | 2016-03-25 | 2020-04-27 | Ласло ПАКХ | METHOD FOR RED SLUDGE PROCESSING AND PRODUCTION OF RARE-EARTH METAL SALTS |
-
2008
- 2008-10-30 CN CN2008101951314A patent/CN101463420B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101463420A (en) | 2009-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102634621A (en) | Device and method for treating refractory iron ore | |
| CN101413057B (en) | Method for efficiently separating low-ore grade and complicated iron ore | |
| CN101463420B (en) | Method and apparatus for enriching low grade siderite | |
| CN101570820B (en) | Method for rapidly reducing and roasting as well as synchronously dephosphorizing and extracting iron at high temperature of high-silicon high-phosphorus iron ore | |
| CN104212931B (en) | A kind of method utilizing rotary kiln drastic reduction to produce metal iron powder | |
| CN104164556A (en) | Chain grate-tandem rotary kiln whole-particle fraction magnetic roasting process for refractory low-grade iron ore | |
| CN101462093A (en) | Method and device for enriching iron ore of low ore grade | |
| CN104651563B (en) | A kind of low lean high phosphorus difficulty selects ferrum/Reduction of manganese ore smelting choosing to combine the method carrying ferrum dephosphorization | |
| CN101913652B (en) | Method for roasting vanadium pentoxide extracted by scherbinaite coal contained primary ore | |
| CN102127635A (en) | Fluidized roasting method for gold sulfide ore | |
| CN112795793B (en) | Comprehensive utilization method of niobite | |
| CN105734192A (en) | Beneficiation production method for low-grade hematite | |
| KR102176651B1 (en) | Manufacturing Methods of Sintered Ferrite Briquette for Iron Manufacture And Manufacturing Apparatus Therefor | |
| CN103205584A (en) | Production device and production method of manganese monoxide mineral powder | |
| CN100532590C (en) | Method for producing fine iron sand powder by using ferro-sulphur ore as raw material and equipment thereof | |
| CN102925612A (en) | Method for extracting sponge iron from sulfate slag by reducing roasting of tunnel kiln | |
| CN110527825A (en) | The carbon-free sintering method of magnetic iron ore based on electromagnetic induction | |
| CN113005284B (en) | Application method of titanium-containing sea sand in sinter production | |
| CN1676620A (en) | Ore dressing process for reducing magnetic iron ore from hematite carbonaceous pelletizing | |
| CN103589857A (en) | Full utilization method for middle and low-grade pyrite | |
| CN210585357U (en) | Deironing device of refractory material fine powder | |
| CN210585358U (en) | Novel deironing device of refractory material | |
| CN108004396B (en) | It is a kind of to produce acidic oxidation pellet method using nickel slag | |
| CN202530107U (en) | Refractory iron ore processing equipment | |
| CN110369124A (en) | A kind of deironing apparatus that refractory material is novel and technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20111030 |