CN101767050A - Method for physical dissociation of phosphorus element and iron element in high phosphorous iron ore - Google Patents
Method for physical dissociation of phosphorus element and iron element in high phosphorous iron ore Download PDFInfo
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- CN101767050A CN101767050A CN201010033784A CN201010033784A CN101767050A CN 101767050 A CN101767050 A CN 101767050A CN 201010033784 A CN201010033784 A CN 201010033784A CN 201010033784 A CN201010033784 A CN 201010033784A CN 101767050 A CN101767050 A CN 101767050A
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Abstract
The invention belongs to the technical field of separation and extraction valuable resources in a low carbon manner, in particular relating to a method for physical dissociation of phosphorus element and iron element in high phosphorous iron ore. The method is characterized by comprising the following steps: coarse grinding high phosphorous iron ore, sieving, drying, and superfine grinding by using a high-speed jet mill to grind the high phosphorous iron ore with the common particle size of 80-200 meshes to superfine particle size with the particle mean size of 2 mu m, wherein the particle diameter distribution range of the high phosphorous iron ore after superfine grinding is 102-104nm, and the dissociation degree of the phosphorus element and iron element is higher. The invention has the advantage of using the method for superfine grinding the high phosphorous iron ore to realize physical dissociation of the phosphorus element and iron element, thus being in favor of realizing respective enrichment of high-grade iron-enriched substances and phosphorus-enriched substances in subsequent steps so as to obtain the iron-enriched substances and phosphorus-enriched substances respectively.
Description
Technical field
The invention belongs to valuable resource low-carbon (LC) separation and extraction technology field, P elements and ferro element are without the physics dissociating method of fusing in particularly a kind of high-phosphorus hematite.
Background technology
In Hubei of China, areas such as Yunnan, Henan have abundant bloodstone resource, yet because phosphorus content is very high in these iron ore deposits, have in addition surpass 1.0%, these bloodstone fail effectively to use.By the existing production technology level requirement of Iron and Steel Enterprises in China, phosphorously in the bloodstone be lower than 0.2%～0.3%, just have rational industrial application value.In recent years, the development and use of domestic high-phosphorus hematite have many achievements in research, adopt the poly-group of dispersion-selectivity desliming-reverse flotation dephosphorization technology, Lu Jun to adopt the poly-group-reverse floatation process of desliming-selectivity to handle high-phosphorus hematite as discipline army.These results of study show and since in the ore deposit ferro element, P elements dissociate insufficient, so the enrichment of iron grade is limited in the iron ore concentrate.Chinese patent disclosed " a kind of ore-dressing technique of high-phosphorus hematite and device " (publication number: CN 101524665A) use 200～500 order breezes through the cyclone separator selection by winnowing separate obtain grade more than 63%, phosphorus content less than 0.15% iron ore concentrate, iron recovery greater than 78%, the dissociation degree that this process limitation condition is iron, phosphorus compound, breeze size distribution situation.Generally speaking, no matter be flotation inverse flotation method, magnetic method, all there is iron, phosphorus compound insufficient, the uneven problem of mill back breeze granularity of dissociating in existing the whole bag of tricks, and the separating effect of high-phosphorus hematite is not good.
Summary of the invention
The present invention seeks in order to solve iron, phosphorus compound in the high-phosphorus hematite insufficient, the uneven problem of mill back breeze granularity of dissociating.
In a kind of high-phosphorus hematite P elements and ferro element physical solution from method, it is characterized in that using high velocity air mill technology to carry out ultra-fine mill after high-phosphorus hematite corase grind, screening, the oven dry, common granularity 80～200 purpose high-phosphorus hematites are finely ground to the ultra-fine granularity that particle mean size is 2 μ m, and particle size distribution range is 10
2Nm～10
4Nm, with the physical solution of realizing P elements, ferro element in the high-phosphorus hematite from.Technical process is:
Dry back breeze adopts high velocity air mill technology to carry out ultra-fine mill, and in the ultra-fine mill process of breeze, parameter control is as follows:
(1) grinds gas pressure:＞0.6MPa;
(2) separator rotating speed: 5000～5500r/min;
(3) cleaning equipment after sorting finishes, the separator rotating speed is 500～550r/min during cleaning.
Breeze is sent into grinding machine through inlet valve, grinds the nozzle acceleration of gas by opposite disposed, reaches after gas sprays to drive the powder motion at a high speed.The breeze high-speed motion runs foul of each other, and forms fluid bed, and material collides in fluid bed and attenuates, until being sub-elected.Powder after the fragmentation flows to the exit with air-flow, by separation wheel, and a Frequency Converter Control sorting driven by motor separation wheel rotation, fine powder is separated, and coarse granule continues to grind by sliding back milling zone on the wall.The mixture of air-flow and powder rotates in separator and produces centrifugal force, and material is thrown away, and super finely ground slag flows out through air outlet in company with gas.Different based on rich iron material and rich phosphorus material density: Fe
2O
3Density be 4.90～5.30g/cm
3, and apatite (Ca
5[PO
4]
3The density of (F, OH)) is 3.16～3.22g/cm
3, both differ 1.55～1.65 times, adopt fluidization process to realize separating of rich iron substance and rich phosphorus substance and enrichment respectively for subsequent technique.
The present invention is based on the chemical analysis that typical high-phosphorus hematite is carried out, learn TFe=42.8% in the regional high-phosphorus hematite of bestowing favour, P=0.85%, even opposite extreme situations---P elements in the ore deposit all with the ferro element chemical bond, the mol ratio of ferro element and P elements is 1: 1, and the reduced mass ratio is 56: 31=1.8: 1.0; Promptly the ferro element that exists with compound form with 0.86% P elements only is 1.5%, still have the ferro element individualism more than 41% in the ore deposit, and then by scanning electron microscopic observation and energy spectrum analysis, learn that P elements in the ore deposit, ferro element do not exist with mutual chemical combination, if can carry out ultra-fine mill, be expected to be separated.According to proposition if with the high-phosphorus hematite fine grinding to a certain degree, the physical solution that just might realize P elements in the high-phosphorus hematite, ferro element from reasoning imagine.
Advantage of the present invention be adopt physical solution that the method for ultra-fine mill high-phosphorus hematite realizes P elements, ferro element in the high-phosphorus hematite from, help the back step to realize the difference enrichment of rich iron substance of high-grade and rich phosphorus substance obtaining rich iron substance and rich phosphorus substance respectively.
Description of drawings
Fig. 1 is a high velocity air grinding process equipment schematic diagram,
1 automatic feeder among the figure, 2 compressed air, 3 grinders, 4 cyclone separators, 5 powder outlets, 6 compressed air, the outlet of 7 fine powders, 8 filters, 9 compressors, 10 recirculated waters, 11 replenish nitrogen.
Fig. 2 be ultra-fine mill back high-phosphorus hematite the size distribution situation (average grain diameter: 2.924 μ m),
Q is a size distribution among the figure; Q is a cumulative distribution.
Concrete implementation content
Adopt high velocity air mill technology that it is carried out ultra-fine mill enshi high-phosphorus hematite corase grind, screening, oven dry back according to the present invention, grind gas pressure in the fine grinding process to be controlled at＞0.6MPa, the separator rotating speed is controlled at 5000～5500r/min; Ferro element, phosphorus element content are measured in the granularity of the high-phosphorus hematite powder after then using laser diffraction and scattering formula sedimentograph and Electronic Speculum laser diffraction analysis to ultra-fine mill respectively and the different mineral powder granular, the result shows: adopt high velocity air mill technology that high-phosphorus hematite is carried out ultra-fine mill, having obtained particle mean size is 2 μ m, particle size distribution range is the ultra-fine Iron Ore Powder of 102nm～104nm, wherein P elements, ferro element dissociation degree are higher, respectively shown in table 1 and accompanying drawing 2.
Table 1 is the situation of dissociating of ultra-fine mill back high-phosphorus hematite powder P elements, ferro element
As can be seen from Table 1, only particle 1,2,3,6 detects phosphorus content, is up to 11.83%, and corresponding iron content is 16.73%; All the other particles do not detect phosphorus content, illustrate that the ultra-fine mill of high-phosphorus hematite back P elements, ferro element dissociation degree are higher, can be respectively applied for and produce rich phosphorus and rich iron substance.
Claims (1)
- In the high-phosphorus hematite P elements and ferro element physical solution from method, it is characterized in that using high velocity air mill technology to carry out ultra-fine mill after high-phosphorus hematite corase grind, screening, the oven dry, the high-phosphorus hematite of the common granularity of 80～200 orders is finely ground to the ultra-fine granularity that particle mean size is 2 μ m, and the high-phosphorus hematite particle size distribution range after the fine grinding is 10 2Nm～10 4Nm, P elements, ferro element dissociation degree height; Technical process is:Dry back breeze uses high velocity air mill technology to carry out fine grinding, and in the ultra-fine mill process of breeze, parameter control is as follows:(1) grinds gas pressure:＞0.6MPa;(2) separator rotating speed: 5000～5500r/min;(3) cleaning equipment after sorting finishes, the separator rotating speed is 500～550r/min during cleaning;Breeze is sent into grinding machine through inlet valve, grinds the nozzle acceleration of gas by opposite disposed, reaches after gas sprays to drive the powder motion at a high speed; The breeze high-speed motion runs foul of each other, and forms fluid bed, and material collides in fluid bed and attenuates, until being sub-elected; Powder after the fragmentation flows to the exit with air-flow, by separation wheel, and a Frequency Converter Control sorting driven by motor separation wheel rotation, fine powder is separated, and coarse granule continues to grind by sliding back milling zone on the wall; The mixture of air-flow and powder rotates in separator and produces centrifugal force, and material is thrown away, and super finely ground slag flows out through air outlet in company with gas; Different based on rich iron material and rich phosphorus material density: Fe 2O 3Density be 4.90～5.30 g/cm 3, and apatite Ca 5[PO 4] 3(F, density OH) is 3.16～3.22g/cm 3, both differ 1.55～1.65 times, adopt fluidization process to realize separating of rich iron substance and rich phosphorus substance and enrichment respectively for subsequent technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010033784XA CN101767050B (en) | 2010-01-12 | 2010-01-12 | Method for physical dissociation of phosphorus element and iron element in high phosphorous iron ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010033784XA CN101767050B (en) | 2010-01-12 | 2010-01-12 | Method for physical dissociation of phosphorus element and iron element in high phosphorous iron ore |
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|---|---|
| CN101767050A true CN101767050A (en) | 2010-07-07 |
| CN101767050B CN101767050B (en) | 2011-04-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001610A (en) * | 2013-08-13 | 2014-08-27 | 中磁科技股份有限公司 | Multi-stage neodymium iron boron pulverizing system |
| CN106222348A (en) * | 2016-08-04 | 2016-12-14 | 北京科技大学 | Ferrum phase and the device and method of rich phosphorus slag in cryogenic separation high-phosphorus iron ore reduced ore |
| CN108097421A (en) * | 2017-12-29 | 2018-06-01 | 安庆市汇智科技咨询服务有限公司 | A kind of breaker and its method that can uniformly crush superhard alloy |
-
2010
- 2010-01-12 CN CN201010033784XA patent/CN101767050B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001610A (en) * | 2013-08-13 | 2014-08-27 | 中磁科技股份有限公司 | Multi-stage neodymium iron boron pulverizing system |
| CN106222348A (en) * | 2016-08-04 | 2016-12-14 | 北京科技大学 | Ferrum phase and the device and method of rich phosphorus slag in cryogenic separation high-phosphorus iron ore reduced ore |
| CN106222348B (en) * | 2016-08-04 | 2018-02-02 | 北京科技大学 | Iron phase and the device and method of rich phosphorus slag in cryogenic separation high-phosphorus iron ore reduced ore |
| CN108097421A (en) * | 2017-12-29 | 2018-06-01 | 安庆市汇智科技咨询服务有限公司 | A kind of breaker and its method that can uniformly crush superhard alloy |
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| Publication number | Publication date |
|---|---|
| CN101767050B (en) | 2011-04-13 |
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Assignee: Beijing Junda Hi Tech Co Ltd Assignor: Li Shiqi Contract record no.: 2012110000001 Denomination of invention: Method for physical dissociation of phosphorus element and iron element in high phosphorous iron ore Granted publication date: 20110413 License type: Exclusive License Open date: 20100707 Record date: 20120112 |
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