CN104261363B - A kind of ground phosphate rock granulating and forming roasting method - Google Patents
A kind of ground phosphate rock granulating and forming roasting method Download PDFInfo
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- CN104261363B CN104261363B CN201410493098.9A CN201410493098A CN104261363B CN 104261363 B CN104261363 B CN 104261363B CN 201410493098 A CN201410493098 A CN 201410493098A CN 104261363 B CN104261363 B CN 104261363B
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Abstract
A kind of ground phosphate rock granulating and forming roasting method; phosphorus ore is through broken, screening, oven dry and the pretreated ground phosphate rock of homogenizing; feeding ball mill is levigate; add granulating disc; the binding agent that the intermediate product acid sludge evenly adding two water thing method Wet-process Phosphoric Acid Production is in proportion made; ground phosphate rock is bondd mutually; make the phosphorus ore pelletizing that granularity reaches 20 ~ 30mm; phosphorus furnace exhaust gas passes into chain comb formula burning machine; at 850 ~ 950 DEG C of roasting temperatures; through air cooling cooling, namely make the phosphorus ore pelletizing for phosphorus production.The present invention make full use of Production Flow Chart intermediate product processing after as auxiliary material direct reuse in Production Flow Chart, without the need to increasing the consumption of other supplementary material and coke powder equal energy source newly, utilize phosphorus furnace exhaust gas, adopt unique roasting and air cooling technique, by P in ground phosphate rock pelletizing
2o
5content improve 8 ~ 10%, and do not increase the silico-calcium ratio (acidity quotient Mk) in phosphorus ore pelletizing, achieve the high-efficiency comprehensive utilization of phosphate rock resource.
Description
Technical field
The present invention relates to a kind of granulating and forming roasting method of ground phosphate rock, belong to technical field of phosphorous chemical industry.
Technical background
Rock Phosphate (72Min BPL) is from exploitation, transport, to factory through processing treatment fed to boiler such as fragmentation, oven dry, screenings, lump ore amount only has about 50%, buy the qualified lump ore phosphorus through cleaning, usually also 15% ~ 20% to be lost, the ground phosphate rock enormous amount that the screening of phosphorus production enterprise is remaining, is not used and will causes the significant wastage of phosphor resource and serious financial loss." Yellow Phosphorus Industry entry criteria " that country implements explicitly calls for the breeze utilization ratio of yellow phosphorus enterprise to reach 100%.Part phosphorus production enterprise attempts adopting ground phosphate rock to add clay or the water glass technique as granulating and forming roasting after binding agent, in the hope of reaching the valuable phosphate rock resource of comprehensive utilization, reducing the object of product cost, but after adding clay or water glass, all reduce P in phosphorus ore
2o
5content, add the silicone content in ground phosphate rock, be not suitable for high silicon ground phosphate rock use.CN102381690 discloses medicament that a kind of rare earth element, sodium-chlor, calcium chloride, zinc chloride, sodium carbonate and salt of wormwood makes and montmorillonite powder in proportion, the powdered rock phosphate oxygen-enriched binder made after mixing, slaking, drying, ball grinds, but have that to add raw material numerous, making processes is tediously long and loaded down with trivial details, is difficult to the defects such as control and additional subsequent process after pyroreaction to the chemical composition in finished product and waste.
Summary of the invention
The object of this invention is to provide a kind of method of granulating and forming roasting of ground phosphate rock; pretreated ground phosphate rock is after ball mill is again levigate; send into granulating disc; evenly add the binding agent made with the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production in proportion; through granulating and forming; utilize phosphorus furnace exhaust gas, adopt unique roasting and air cooling technique, produce the phosphorus ore pelletizing for phosphorus production.The method effectively overcomes the defect that prior art exists, and proposes the new technical scheme of a kind of save energy, utilize resources synthetically.
The present invention is achieved through the following technical solutions:
A kind of ground phosphate rock granulating and forming roasting method; phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment; making weight percent moisture is 5% ~ 8%; the ground phosphate rock of granularity≤10mm; send into ball mill, by levigate for ground phosphate rock to granularity be≤0.1mm after, add granulating disc; the outstanding difference of itself and prior art is: the solid substance weight percentage that the intermediate product acid sludge evenly adding two water thing method Wet-process Phosphoric Acid Production is made is 15% ~ 35%, P
2o
5weight percentage be the binding agent of 30% ~ 46%, the proportioning of binding agent and ground phosphate rock weight ratio is 3:7, ground phosphate rock is bondd mutually, makes the phosphorus ore pelletizing that granularity reaches 20 ~ 30mm, enter chain comb formula burning machine, pass into phosphorus furnace exhaust gas, at 850 ~ 950 DEG C of roasting temperatures, the time is 20 ~ 30 minutes, then enters chain grate cooler, be cooled to less than 100 DEG C through air cooling, namely make the phosphorus ore pelletizing for phosphorus production.
The waste gas that oven dry, roasting, cooling produce is qualified discharge after dedusting, washing, and fine particle and dust return stirrer and reuse.
The intermediate product that the present invention makes full use of Production Flow Chart after processing as auxiliary material direct reuse in Production Flow Chart; namely with the binding agent that the middle acid sludge of two water thing method wet method phosphoric acid manufacture process is made; evenly granulating disc is added in proportion with the ground phosphate rock through homogenizing pre-treatment and ball-milling processing; granulating and forming; without the need to the consumption of newly-increased coke powder equal energy source; utilize phosphorus furnace exhaust gas, adopt unique roasting and air cooling technique, produce the phosphorus ore pelletizing for phosphorus production.By P in ground phosphate rock pelletizing
2o
5content improve 8 ~ 10%, and do not increase the silico-calcium ratio (acidity quotient Mk) in phosphorus ore pelletizing, achieve the high-efficiency comprehensive utilization of phosphate rock resource.
Accompanying drawing explanation
Accompanying drawing 1 is production schematic diagram of the present invention.
Embodiment
Following embodiment is intended to describe in further detail and explain the present invention, instead of limits the present invention by any way.Those of ordinary skill in the art's any simple modifications made for the present invention and replacement, all should fall within protection scope of the present invention.
Embodiment 1
A kind of ground phosphate rock granulating and forming roasting method; phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment; making weight percent moisture is 5%; the ground phosphate rock of granularity≤10mm; send into ball mill, by levigate for ground phosphate rock to granularity be≤0.1mm after, add granulating disc; the solid substance weight percentage that the intermediate product acid sludge evenly adding two water thing method Wet-process Phosphoric Acid Production is made is 15%, P
2o
5weight percentage be the binding agent of 46%, the proportioning of binding agent and ground phosphate rock weight ratio is 3:7, ground phosphate rock is bondd mutually, makes the phosphorus ore pelletizing that granularity reaches 20mm, enter chain comb formula burning machine, pass into phosphorus furnace exhaust gas, at 850 DEG C of roasting temperatures, the time is 20 minutes, then enters chain grate cooler, be cooled to less than 70 DEG C through air cooling, namely make the phosphorus ore pelletizing for phosphorus production.P in phosphorus ore pelletizing
2o
5content improve 10%.
Embodiment 2
A kind of ground phosphate rock granulating and forming roasting method; phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment; making weight percent moisture is 7%; the ground phosphate rock of granularity≤10mm; send into ball mill, by levigate for ground phosphate rock to granularity be≤0.1mm after, add granulating disc; the solid substance weight percentage that the intermediate product acid sludge evenly adding two water thing method Wet-process Phosphoric Acid Production is made is 25%, P
2o
5weight percentage be the binding agent of 42%, the proportioning of binding agent and ground phosphate rock weight ratio is 3:7, ground phosphate rock is bondd mutually, makes the phosphorus ore pelletizing that granularity reaches 25mm, enter chain comb formula burning machine, pass into phosphorus furnace exhaust gas, at 900 DEG C of roasting temperatures, the time is 25 minutes, then enters chain grate cooler, be cooled to less than 80 DEG C through air cooling, namely make the phosphorus ore pelletizing for phosphorus production.P in ground phosphate rock pelletizing
2o
5content improve 9%.
Embodiment 3
A kind of ground phosphate rock granulating and forming roasting method; phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment; making weight percent moisture is 8%; the ground phosphate rock of granularity≤10mm; send into ball mill, by levigate for ground phosphate rock to granularity be≤0.1mm after, add granulating disc; the solid substance weight percentage that the intermediate product acid sludge evenly adding two water thing method Wet-process Phosphoric Acid Production is made is 35%, P
2o
5weight percentage be the binding agent of 36%, the proportioning of binding agent and ground phosphate rock weight ratio is 3:7, ground phosphate rock is bondd mutually, makes the phosphorus ore pelletizing that granularity reaches 30mm, enter chain comb formula burning machine, pass into phosphorus furnace exhaust gas, at 950 DEG C of roasting temperatures, the time is 30 minutes, then enters chain grate cooler, be cooled to less than 90 DEG C through air cooling, namely make the phosphorus ore pelletizing for phosphorus production.P in ground phosphate rock pelletizing
2o
5content improve 8%.
Claims (1)
1. a ground phosphate rock granulating and forming roasting method; phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment; making weight percent moisture is 5% ~ 8%; the ground phosphate rock of granularity≤10mm; send into ball mill, by levigate for ground phosphate rock to granularity be≤0.1mm after, add granulating disc; it is characterized in that: the solid substance weight percentage that the intermediate product acid sludge evenly adding two water thing method Wet-process Phosphoric Acid Production is made is 15% ~ 30%, P
2o
5weight percentage be the binding agent of 30% ~ 47%, the proportioning of binding agent and ground phosphate rock weight ratio is 3:7, ground phosphate rock is bondd mutually, makes the phosphorus ore pelletizing that granularity reaches 20 ~ 30mm, enter chain comb formula burning machine, pass into phosphorus furnace exhaust gas, at 850 ~ 950 DEG C of roasting temperatures, the time is 20 ~ 30 minutes, then enters chain grate cooler, be cooled to less than 100 DEG C through air cooling, namely make the phosphorus ore pelletizing for phosphorus production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410493098.9A CN104261363B (en) | 2014-09-24 | 2014-09-24 | A kind of ground phosphate rock granulating and forming roasting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410493098.9A CN104261363B (en) | 2014-09-24 | 2014-09-24 | A kind of ground phosphate rock granulating and forming roasting method |
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| CN104261363A CN104261363A (en) | 2015-01-07 |
| CN104261363B true CN104261363B (en) | 2016-03-30 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271147B (en) * | 2015-10-22 | 2017-05-17 | 云南天安化工有限公司 | Thermal-process phosphorous sludge type ground phosphate rock binder |
| CN105217586A (en) * | 2015-10-22 | 2016-01-06 | 云南天安化工有限公司 | Liquid-solid phase adjusting type ground phosphate rock binding agent |
| CN105217587A (en) * | 2015-10-22 | 2016-01-06 | 云南天安化工有限公司 | Stone flour type ground phosphate rock binding agent |
| CN105603179A (en) * | 2016-01-13 | 2016-05-25 | 铜陵百荣新型材料铸件有限公司 | Process for granulating, shaping and sintering phosphate powder |
| CN107032311A (en) * | 2016-11-03 | 2017-08-11 | 葛振华 | A kind of yellow phosphorus mineral powder pelletizing method |
| CN114516773A (en) * | 2022-03-01 | 2022-05-20 | 郑州大学 | Method for granulating powdered rock phosphate |
| CN116062721A (en) * | 2022-10-29 | 2023-05-05 | 马边无穷矿业有限公司 | Method for utilizing all elements of phosphate tailings |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102701164B (en) * | 2012-01-04 | 2014-01-08 | 张兴华 | Processing method for preparing phosphate rock powder into pellet yellow phosphorus charge |
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