CN101487081A - Dephosphorization method for oolitic high phosphorus iron ore - Google Patents
Dephosphorization method for oolitic high phosphorus iron ore Download PDFInfo
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- CN101487081A CN101487081A CNA2009100941536A CN200910094153A CN101487081A CN 101487081 A CN101487081 A CN 101487081A CN A2009100941536 A CNA2009100941536 A CN A2009100941536A CN 200910094153 A CN200910094153 A CN 200910094153A CN 101487081 A CN101487081 A CN 101487081A
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Abstract
The invention relates to a high-phosphate oolitic iron ore dephosphorization method. The raw ore is roasted at the temperature of between 400 DEG C and 800 DEG C after crushing, high intensity magnetic separation is carried out after ore grinding, and acid leaching is carried out to ore powder by using industrial sulfuric acid or industrial nitric acid or industrial hydrochloric acid with the proportion being: 4 percent to 10 percent of acid:90 percent to 96 percent of water; the soaking time is 1.5 to 5 hours; phosphorus is obtained by vibration cleaning ore powder by using ultrasonic waves with the frequency being 4000 hertz to 20 000 hertz and vibration time is 15 to 20 minutes, and then concentrates and middlings are picked out by using low intensity magnetic separation. The dephosphorization method has the advantages of low dephosphorization cost, simple dephosphorization technology and equipment and good dephosphorization effects.
Description
Technical field:
The invention belongs to the dephosphorization of high-phosphorus iron ore, especially oolitic high phosphorus iron ore dephosphorizing technology field.
Background technology:
Dephosphorization, especially the oolitic high phosphorus iron ore dephosphorizing technology of existing high-phosphorus iron ore mainly are to adopt medicament flotation fatten ore deposit dephosphorizing technology to carry out dephosphorization, and its dephosphorization cost is too high, and dephosphorization technology and equipment are also complicated; Energy consumption is high especially, and dephosphorization effect is desirable not to the utmost, and often the complicacy dephosphorization because of ore body does not reach the specification of quality of country to smeltery's regulation, causes dephosphorization repeatedly, makes production cost very high.
Oolitic high phosphorus iron ore is the very abundant iron ores of highlands, Yunnan Province reserves, the average phosphorous grade of its ore is 0.8～1%, its roe shape iron ore accounts for 60% of whole Yunnan ore deposit reserve, reach several hundred million tons, because the high-phosphor oolitic iron ore is tens thousand of year sedimentary animal grease in seabed, preceding sea and sclerotin and the high-phosphorus iron ore of iron ore formation, ore forms at visible iron ore of microscopically and phosphorus lamination, is difficult to separate.As not falling phosphorus, the phosphorous grade average out to of this iron ore concentrate is difficult to reach the smelting standard more than 0.7%.Oolitic high phosphorus iron ore stone mainly originates from Wuding County, Yunnan, this ore has olitie texture, and the oolith granularity is 0.1～0.8mm, and rhombohedral iron ore is flakey, fibrously mixes numerous shape embedding cloth in gangue mineral, iron content 45～50%, the endless belt width of rhombohedral iron ore is below the 30 μ m in the oolith.Because the rhombohedral iron ore crystalline particle is superfine,, sorting in the separation quite difficulty generally at 1～3 μ m.To the high-phosphor oolitic hematite ore of this complicated component, at present the dephosphorizing method that adopts still can only be that medicament flotation fatten ore deposit dephosphorizing technology carries out dephosphorization, cost height and dephosphorization effect is poor.
Summary of the invention:
Purpose of the present invention is the defective of dephosphorization effect difference and the high-phosphor oolitic iron ore that a kind of technology is simple, easy to operate, energy consumption is little, production cost is low, dephosphorization effect is good dephosphorizing method is provided in order to overcome cost height that the above-mentioned existing dephosphorizing method of high-phosphor oolitic iron ore exists just.
The objective of the invention is to realize by following technical solution.
The invention has the beneficial effects as follows that technology is simple, easy to operate, energy consumption is little, production cost is low, dephosphorization effect is splendid, can make the iron ore concentrate of selecting reach the specification of quality of country fully smeltery's regulation.
The dephosphorizing process of high-phosphor oolitic hematite be ore after roasting, the useful component in the ore can be transformed into oxide compound, be convenient to reclaim.Because the CaSo that is generated during the ore acidleach
4, CaCl
2Generate the indissoluble film Deng easy and mineral surface, mechanical stirring can not play cleanup action again well, thereby can hinder leaching process, ultrasonic cleaning has then well solved indissoluble film problem, the iron ore concentrate phosphorus content is obviously reduced, acidleach---ultrasonic cleaning process has carried out dephosphorization to the high-phosphor oolitic iron ore in application, reach 0.85% though rhombohedral iron ore is phosphorous, granularity is 0.045mm, 20,000 hertz of ultrasonic frequencies, acid concentration 8%, extraction time 15 minutes, net result is phosphorous 0.13%, and iron recovery is 86%.The acid that the acid leaching process link adopts can be selected a kind of in the middle of industry stream acid or industrial nitric acid or the technical hydrochloric acid arbitrarily for use, and effect is suitable.And no matter select that a kind of acid for use, do not influence the parameter adjustment of other process procedure.
Further set forth content of the present invention below in conjunction with drawings and Examples.
Description of drawings:
Fig. 1 is a process flow diagram of the present invention.
Embodiment:
The inventive method is, the high-phosphorus iron ore raw ore is sent into 400 ℃～800 ℃ temperature roastings of employing in the shaft furnace after fragmentation, roasting time 10～20 minutes, then behind ore grinding, carry out high intensity magnetic separation, after removing mine tailing breeze is carried out acidleach, promptly adopt acid solution to soak, the acid that acidleach is adopted is industry stream acid or industrial nitric acid or technical hydrochloric acid; The ratio of acid solution is industry stream acid or industrial nitric acid or technical hydrochloric acid 4～10%: water 90～96%; Soak time is 1.5～5 hours; Adopt ultrasonic wave with 4,000～20,000 hertz frequencies breeze to be vibrated again to the breeze after the acidleach and clean out phosphorus, time of vibration is 15～20 minutes, adopts low intensity magnetic separation to select concentrate and chats again.
The present invention also can enter the acidleach dephosphorization technology through the ore grinding link again with the chats of selecting through low intensity magnetic separation.
Embodiment one
The product of this experiment is the industrial experiment product.The testing ground: Wuding County, Yunnan flowers and fruits mountain valley with clumps of trees and bamboo high-phosphorus iron ore apolegamy factory, significant parameter: with former mining crusher in crushing below 30mm; Adopt 15m
3Shaft furnace, 700 ℃ of maturing temperatures, the colliery was than 1:25, roasting time 20 minutes.5 minutes ore grinding time, ore powder granularity 0.045mm reach 75%, and high intensity magnetic separation adopts 4 kilogausss; Acidleach: adopt 8% dilute nitric acid solution, leaching time: 3 hours, ultrasonic cleaning: 20,000 hertz frequencies, scavenging period: 15 minutes, after low intensity magnetic separation, reached phosphor-removing effect preferably, the iron grade reaches more than 58%.
Embodiment two
Wuding County, Yunnan oolitic high phosphorus iron ore, iron content 38%, phosphorous 0.8%, with former mining crusher in crushing below 30mm, 400 ℃ of roastings 10 minutes, grind into 80% with ball mill again and cross 100 purpose slips, carry out strong magnetic and roughly select under about 4000 Gauss's high-intensity magnetic fields, the gangue slip of roughly selecting out is sent to the settling tank sedimentation and is handled.The qualified iron ore of roughly selecting out, the sulphuric acid soln of adding 4% soaked 1.5 hours earlier under sour environment, send into sonochemistry dephosphorization board slot after the stirring, under 4 kilohertz ultrasonic wave effects, iron ores particle was continued to strengthen reaction decomposes 25～30 minutes, and 80%-85% phosphorus is removed by the acid decomposition in the iron ore, carry out about 2000 Gauss's low intensity magnetic separations afterwards again, can obtain phosphorus content below 0.25%, the iron ore concentrate of iron grade more than 60% satisfies metallurgical materials requirement fully.The mine tailing slip that magnetic separation produces is sent into mine tailing settling tank precipitate and separate, and mine tailing is sent to the mine tailing storehouse and stacked, and stillness of night retrieval system continues to use.
Embodiment three:
Lufeng, Yunnan oolitic high phosphorus iron ore, iron content 48%, phosphorous 0.8%, with crusher in crushing below 30mm, roasting is 15 minutes in 800 ℃, grind into 80% with ball mill again and cross 150 purpose slips, carry out strong magnetic and roughly select under about 4000 gauss magnetic fields, the gangue slip of roughly selecting out is sent to the settling tank sedimentation and is handled.The qualified iron ore of roughly selecting out, the hydrochloric acid soln of adding 10% soaked 5 hours earlier under sour environment, send into sonochemistry dephosphorization jar after the stirring, under 6 kilohertz ultrasonic wave effects, iron ores particle was continued to strengthen reaction decomposes 15～25 minutes, and 80%-85% phosphorus is removed by the acid decomposition in the iron ore, carry out about 2000 Gauss's low intensity magnetic separations afterwards again, can obtain phosphorus content below 0.25%, the iron ore concentrate of iron grade more than 60% satisfies metallurgical materials requirement fully.The mine tailing slip that magnetic separation produces is sent into mine tailing settling tank precipitate and separate, and mine tailing is sent to the mine tailing storehouse and stacked, and stillness of night retrieval system continues to use.
Claims (2)
1, a kind of dephosphorization method for oolitic high phosphorus iron ore, it is characterized in that: the high-phosphorus iron ore raw ore is sent into after fragmentation in the shaft furnace through 4000C～8000C temperature roasting, roasting time 10～20 minutes, then behind ore grinding, carry out high intensity magnetic separation, after removing mine tailing breeze is carried out acidleach, the acid that acidleach is adopted is industry stream acid or industrial nitric acid or technical hydrochloric acid; The ratio of acid solution is industry stream acid or industrial nitric acid or technical hydrochloric acid 4～10%: water 90～96%; Soak time is 1.5～5 hours; Adopt ultrasonic wave with 4,000～20,000 hertz frequencies breeze to be vibrated again to the breeze after the acidleach and clean out phosphorus, time of vibration is 15～20 minutes, adopts low intensity magnetic separation to select concentrate and chats again.
2, a kind of dephosphorization method for oolitic high phosphorus iron ore according to claim 1 is characterized in that, the chats of selecting through low intensity magnetic separation can enter the acidleach dephosphorization technology through the ore grinding link again.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824532A (en) * | 2010-04-02 | 2010-09-08 | 南昌大学 | Dephosphorizing method for phosphorus iron ore |
| CN101823026A (en) * | 2010-03-18 | 2010-09-08 | 武汉理工大学 | Combined collecting agent for reverse flotation phosphorous reduction of high phosphorus oolitic hematite |
| CN102716801A (en) * | 2012-06-27 | 2012-10-10 | 宜昌市正济文化传播有限公司 | Dressing method for high-phosphor-content oolitic hematite |
| CN103276198A (en) * | 2013-06-13 | 2013-09-04 | 陕西延长石油矿业有限责任公司 | Acid leaching technology for eroding silicon, preserving iron and removing phosphorus in high phosphorus oolitic hematite |
| US8545594B2 (en) | 2011-08-01 | 2013-10-01 | Superior Mineral Resources LLC | Ore beneficiation |
| US8741023B2 (en) | 2011-08-01 | 2014-06-03 | Superior Mineral Resources LLC | Ore beneficiation |
| CN108531719A (en) * | 2018-05-03 | 2018-09-14 | 东北大学 | A kind of high-phosphorus iron ore suspended state redox roasting-acidleach dephosphorization method |
-
2009
- 2009-03-04 CN CNA2009100941536A patent/CN101487081A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823026A (en) * | 2010-03-18 | 2010-09-08 | 武汉理工大学 | Combined collecting agent for reverse flotation phosphorous reduction of high phosphorus oolitic hematite |
| CN101823026B (en) * | 2010-03-18 | 2012-12-19 | 武汉理工大学 | Combined collecting agent for reverse flotation phosphorous reduction of high phosphorus oolitic hematite |
| CN101824532A (en) * | 2010-04-02 | 2010-09-08 | 南昌大学 | Dephosphorizing method for phosphorus iron ore |
| US8545594B2 (en) | 2011-08-01 | 2013-10-01 | Superior Mineral Resources LLC | Ore beneficiation |
| US8741023B2 (en) | 2011-08-01 | 2014-06-03 | Superior Mineral Resources LLC | Ore beneficiation |
| US8834593B2 (en) | 2011-08-01 | 2014-09-16 | Superior Mineral Resources LLC | Ore beneficiation |
| CN102716801A (en) * | 2012-06-27 | 2012-10-10 | 宜昌市正济文化传播有限公司 | Dressing method for high-phosphor-content oolitic hematite |
| CN102716801B (en) * | 2012-06-27 | 2014-03-26 | 宜昌市正济文化传播有限公司 | Dressing method for high-phosphor-content oolitic hematite |
| CN103276198A (en) * | 2013-06-13 | 2013-09-04 | 陕西延长石油矿业有限责任公司 | Acid leaching technology for eroding silicon, preserving iron and removing phosphorus in high phosphorus oolitic hematite |
| CN103276198B (en) * | 2013-06-13 | 2014-09-24 | 陕西延长石油矿业有限责任公司 | Acid leaching technology for eroding silicon, preserving iron and removing phosphorus in high phosphorus oolitic hematite |
| CN108531719A (en) * | 2018-05-03 | 2018-09-14 | 东北大学 | A kind of high-phosphorus iron ore suspended state redox roasting-acidleach dephosphorization method |
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