CN104261368B - A kind of method that ground phosphate rock pressure ball molding is dried - Google Patents
A kind of method that ground phosphate rock pressure ball molding is dried Download PDFInfo
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- CN104261368B CN104261368B CN201410493117.8A CN201410493117A CN104261368B CN 104261368 B CN104261368 B CN 104261368B CN 201410493117 A CN201410493117 A CN 201410493117A CN 104261368 B CN104261368 B CN 104261368B
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Abstract
The method that the pressure ball molding of a kind of ground phosphate rock is dried, phosphorus ore is through crushing, sieve, dry and after homogenizing pretreatment, making weight percent moisture is 5%～8%, the ground phosphate rock of granularity≤10mm, adding the binding agent that the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production is made, binding agent is 3～4:6～7 with the proportioning of ground phosphate rock weight ratio, and uniform stirring becomes compound, after being pressed into ball, then dry under the conditions of temperature is 400～450 DEG C.The phosphorus ore pelletizing that the present invention produces, P2O5Content improve 8～10%, yield rate is high, and returning charge rate is low, makes full use of phosphorus furnace exhaust gas, without newly-increased energy resource consumption, saves mass energy, it is achieved that the high-efficiency comprehensive utilization of phosphate rock resource.
Description
Technical field
The present invention relates to the method that the pressure ball molding of a kind of ground phosphate rock is dried, belong to technical field of phosphorous chemical industry.
Technical background
Rock phosphate in powder is from exploitation, transport, to factory through crushing, drying, the processed fed to boiler such as screening, lump ore amount only has about 50%, buy the qualified lump ore phosphorus through cleaning, generally also to lose 15%～20%, remaining ground phosphate rock enormous amount is screened by phosphorus production enterprise, is not used and will result in the significant wastage of phosphor resource and serious economic loss." the Yellow Phosphorus Industry entry criteria " that country implements is distinctly claimed the breeze utilization rate of yellow phosphorus enterprise must reach 100%.Part phosphorus production enterprise attempts using ground phosphate rock to add the technique that waterglass is dried as pressure ball molding after binding agent, in the hope of reaching the valuable phosphate rock resource of comprehensive utilization, reducing the purpose of product cost, but after adding waterglass, reduces P in phosphorus ore2O5Content, add the silicone content in ground phosphate rock, be not suitable for high silicon ground phosphate rock use.CN 102381690 discloses medicament that a kind of rare earth element, sodium chloride, calcium chloride, zinc chloride, sodium carbonate and potassium carbonate make with montmorillonite powder in proportion, blended, ripening, the powdered rock phosphate oxygen-enriched binder being dried, making after ball grinds, but there is addition raw material numerous, manufacturing process is tediously long and loaded down with trivial details, is difficult to the chemical composition in finished product and garbage to control and the defect such as additional subsequent process after pyroreaction.
Summary of the invention
It is an object of the invention to provide the method that the pressure ball molding of a kind of ground phosphate rock is dried, it utilizes the binding agent that the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production is made, after through the ground phosphate rock of pretreatment, uniform stirring mixes in proportion, through pressure ball molding, utilize phosphorus furnace exhaust gas, use unique stoving process, produce the phosphorus ore pelletizing for phosphorus production.The method effectively overcome prior art exist defect, it is proposed that a kind of save the energy, comprehensive utilization resource new technical scheme.
The present invention is achieved through the following technical solutions:
The method that the pressure ball molding of a kind of ground phosphate rock is dried, phosphorus ore is through crushing, sieve, dry and after homogenizing pretreatment, making weight percent moisture is 5%～8%, the ground phosphate rock of granularity≤10mm, send into mixer, it is with the prominent distinction of prior art: adding the solid content weight percentage that the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production makes is 15%～60%, P2O5The binding agent that weight percentage is 35%～46%, binding agent is 3～4:6～7 with the proportioning of ground phosphate rock weight ratio, uniform stirring 4～6 minutes, obtain the compound that weight percent moisture is 9%～12%, send into ball press and be pressed into the ball of diameter 20～50mm, utilize phosphorus furnace exhaust gas, then dry under the conditions of temperature is 400～450 DEG C, time is 40～50 minutes, i.e. makes the phosphorus ore pelletizing for phosphorus production.
Dry qualified discharge after the waste gas removing dust of generation, washing, fine particle and dust return blender to reuse.
The present invention make full use of the intermediate product of production procedure processed after as adjuvant direct reuse in production procedure, the binding agent produced used by ground phosphate rock pelletizing is i.e. made with the middle acid sludge of two water thing method wet method phosphoric acid manufacture process, after through the ground phosphate rock of pretreatment, uniform stirring mixes in proportion, through pressure ball molding, utilize phosphorus furnace exhaust gas, use unique stoving process, produce the phosphorus ore pelletizing for phosphorus production.By P in phosphorus ore pelletizing2O5Content improve 8～10%, and do not increase the silico-calcium ratio (acidity coefficient Mk) in phosphorus ore pelletizing, it is achieved that the efficient circulation of phosphate rock resource and comprehensive utilization.
Accompanying drawing explanation
Accompanying drawing 1 is the production schematic diagram of the present invention.
Detailed description of the invention
Following embodiment is further intended to describe in detail and explain the present invention rather than limit 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 under the scope of the present invention.
Embodiment 1
Phosphorus ore is through crushing, sieve, dry and after homogenizing pretreatment, and making weight percent moisture is 5%, the ground phosphate rock of granularity≤10mm, sends into blender, and adding the solid content weight percentage that the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production makes is 20%, P2O5The binding agent that weight percentage is 45%, binding agent is 3:7 with the proportioning of ground phosphate rock weight ratio, uniform stirring 6 minutes, obtain the compound that weight percent moisture is 9%, sending into ball press and be pressed into the ball of diameter 30mm, then dry under the conditions of temperature is 400 DEG C, the time is 40 minutes, i.e. make the phosphorus ore pelletizing for phosphorus production, P in phosphorus ore pelletizing2O5Content improve 10 %.
Embodiment 2
Phosphorus ore is through crushing, sieve, dry and after homogenizing pretreatment, and making weight percent moisture is 7%, the ground phosphate rock of granularity≤10mm, sends into blender, and adding the solid content weight percentage that the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production makes is 40%, P2O5The binding agent that weight percentage is 38%, binding agent is 4:6 with the proportioning of ground phosphate rock weight ratio, uniform stirring 5 minutes, obtain the compound that weight percent moisture is 10%, sending into ball press and be pressed into the ball of diameter 40mm, then dry under the conditions of temperature is 430 DEG C, the time is 45 minutes, i.e. make the phosphorus ore pelletizing for phosphorus production, P in phosphorus ore pelletizing2O5Content improve 9 %.
Embodiment 3
Phosphorus ore is through crushing, sieve, dry and after homogenizing pretreatment, and making weight percent moisture is 8%, the ground phosphate rock of granularity≤10mm, sends into mixer, and adding the solid content weight percentage that the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production makes is 50%, P2O5The binding agent that weight percentage is 35%, binding agent is 4:6 with the proportioning of ground phosphate rock weight ratio, uniform stirring 4 minutes, obtain the compound that weight percent moisture is 12%, sending into ball press and be pressed into the ball of diameter 50mm, then dry under the conditions of temperature is 450 DEG C, the time is 50 minutes, i.e. make the phosphorus ore pelletizing for phosphorus production, P in phosphorus ore pelletizing2O5Content improve 8 %.
Claims (1)
1. the method that the pressure ball molding of a ground phosphate rock is dried, phosphorus ore is through crushing, sieve, dry and after homogenizing pretreatment, making weight percent moisture is 5%～8%, the ground phosphate rock of granularity≤10mm, send into mixer, it is characterized in that: adding the solid content weight percentage that the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production makes is 15%～60%, P2O5The binding agent that weight percentage is 35%～46%, binding agent is 3～4:6～7 with the proportioning of ground phosphate rock weight ratio, uniform stirring 4～6 minutes, obtain the compound that weight percent moisture is 9%～12%, send into ball press and be pressed into the ball of diameter 20～50mm, drying under the conditions of temperature is 400～450 DEG C, the time is 40～50 minutes, i.e. makes the phosphorus ore pelletizing for phosphorus production again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410493117.8A CN104261368B (en) | 2014-09-24 | 2014-09-24 | A kind of method that ground phosphate rock pressure ball molding is dried |
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| CN201410493117.8A CN104261368B (en) | 2014-09-24 | 2014-09-24 | A kind of method that ground phosphate rock pressure ball molding is dried |
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| CN104261368A CN104261368A (en) | 2015-01-07 |
| CN104261368B true CN104261368B (en) | 2016-09-21 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN107032311A (en) * | 2016-11-03 | 2017-08-11 | 葛振华 | A kind of yellow phosphorus mineral powder pelletizing method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4919906A (en) * | 1988-06-03 | 1990-04-24 | James C. Barber And Associates, Inc. | Processes and equipment for production of elemental phosphorus and thermal phosphoric acid |
| CN102701164B (en) * | 2012-01-04 | 2014-01-08 | 张兴华 | Processing method for preparing phosphate rock powder into pellet yellow phosphorus charge |
| CN103466573B (en) * | 2013-09-13 | 2015-05-20 | 成都乐氏化工工程有限公司 | Energy-saving method for preparing yellow phosphorus from low-quality phosphate ore |
| CN103663396B (en) * | 2013-10-26 | 2016-02-03 | 刘静忠 | Utilize the pelletizing method of mid low grade phosphate rock or ground phosphate rock |
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