CN104261368A - Powdered rock phosphate pellet pressing, molding and drying method - Google Patents
Powdered rock phosphate pellet pressing, molding and drying method Download PDFInfo
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- CN104261368A CN104261368A CN201410493117.8A CN201410493117A CN104261368A CN 104261368 A CN104261368 A CN 104261368A CN 201410493117 A CN201410493117 A CN 201410493117A CN 104261368 A CN104261368 A CN 104261368A
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- phosphorus
- pellet
- phosphate rock
- rock phosphate
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Abstract
The invention discloses a powdered rock phosphate pellet pressing, molding and drying method. The powdered rock phosphate pellet pressing, molding and drying method comprises the steps of pretreating phosphorus ores by crushing, sieving, drying and homogenizing to prepare powdered rock phosphate with the water content of 5-8wt% and the particle size of smaller than or equal to 10mm, and adding an adhesive prepared from acid residues as intermediate products of dihydrate wet-process phosphoric acid production, wherein the weight ratio of the adhesive to the powdered rock phosphate is (3-4):(6-7); uniformly stirring to form a mixture; and after pressing the mixture to form a pellet, drying the pellet at the temperature of 400-450 DEG C. The P2O5 content of a phosphorus ore pellet produced by using the method is increased by 8-10%, the rate of finished products is high, and the material return ratio is low; and the tail gas of a phosphorus furnace is sufficiently utilized, and no newly-increased energy consumption is generated, so that a great number of energy sources are saved, and the efficient and comprehensive utilization of phosphate rock resources is realized.
Description
Technical field
The method that the pressure ball molding that the present invention relates to a kind of ground phosphate rock is dried, belongs 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%.The technique that part phosphorus production enterprise attempts adopting ground phosphate rock to add water glass dries as pressure ball molding 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 water glass, reduces P in phosphorus ore
2o
5content, 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-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 method that the pressure ball molding that the object of this invention is to provide a kind of ground phosphate rock is dried, its binding agent utilizing the intermediate product acid sludge of two water thing method Wet-process Phosphoric Acid Production to make, after through pretreated ground phosphate rock, uniform stirring mixes in proportion, through pressure ball molding, utilize phosphorus furnace exhaust gas, adopt unique stoving process, 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 method of pressure ball molding oven dry of ground phosphate rock, 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 mixing machine, the outstanding difference of itself and prior art is: the solid substance weight percentage that the intermediate product acid sludge adding two water thing method Wet-process Phosphoric Acid Production is made is 15% ~ 60%, P
2o
5weight percentage be the binding agent of 35% ~ 46%, the proportioning of binding agent and ground phosphate rock weight ratio is 3 ~ 4:6 ~ 7, uniform stirring 4 ~ 6 minutes, obtain the compound that weight percent moisture is 9% ~ 12%, send into the ball that ball press is pressed into diameter 20 ~ 50mm, utilize phosphorus furnace exhaust gas, then dry under temperature is 400 ~ 450 DEG C of conditions, time is 40 ~ 50 minutes, namely makes the phosphorus ore pelletizing for phosphorus production.
Dry the waste gas qualified discharge after dedusting, washing produced, 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 make with the middle acid sludge of two water thing method wet method phosphoric acid manufacture process and produce ground phosphate rock pelletizing binding agent used, after through pretreated ground phosphate rock, uniform stirring mixes in proportion, through pressure ball molding, utilize phosphorus furnace exhaust gas, adopt unique stoving process, produce the phosphorus ore pelletizing for phosphorus production.By P in phosphorus ore pelletizing
2o
5content improve 8 ~ 10%, and do not increase the silico-calcium ratio (acidity quotient Mk) in phosphorus ore pelletizing, achieve efficient circulation and the 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
Phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment, and making weight percent moisture is 5%, the ground phosphate rock of granularity≤10mm, and send into stirrer, the solid substance weight percentage that the intermediate product acid sludge adding two water thing method Wet-process Phosphoric Acid Production is made is 20%, P
2o
5weight percentage be the binding agent of 45%, the proportioning of binding agent and ground phosphate rock weight ratio is 3:7, uniform stirring 6 minutes, obtain the compound that weight percent moisture is 9%, send into the ball that ball press is pressed into diameter 30mm, then dry under temperature is 400 DEG C of conditions, the time is 40 minutes, namely the phosphorus ore pelletizing for phosphorus production is made, P in phosphorus ore pelletizing
2o
5content improve 10 %.
Embodiment 2
Phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment, and making weight percent moisture is 7%, the ground phosphate rock of granularity≤10mm, and send into stirrer, the solid substance weight percentage that the intermediate product acid sludge adding two water thing method Wet-process Phosphoric Acid Production is made is 40%, P
2o
5weight percentage be the binding agent of 38%, the proportioning of binding agent and ground phosphate rock weight ratio is 4:6, uniform stirring 5 minutes, obtain the compound that weight percent moisture is 10%, send into the ball that ball press is pressed into diameter 40mm, then dry under temperature is 430 DEG C of conditions, the time is 45 minutes, namely the phosphorus ore pelletizing for phosphorus production is made, P in phosphorus ore pelletizing
2o
5content improve 9 %.
Embodiment 3
Phosphorus ore is after broken, screening, oven dry and homogenizing pre-treatment, and making weight percent moisture is 8%, the ground phosphate rock of granularity≤10mm, and send into mixing machine, the solid substance weight percentage that the intermediate product acid sludge adding two water thing method Wet-process Phosphoric Acid Production is made is 50%, P
2o
5weight percentage be the binding agent of 35%, the proportioning of binding agent and ground phosphate rock weight ratio is 4:6, uniform stirring 4 minutes, obtain the compound that weight percent moisture is 12%, send into the ball that ball press is pressed into diameter 50mm, then dry under temperature is 450 DEG C of conditions, the time is 50 minutes, namely the phosphorus ore pelletizing for phosphorus production is made, P in phosphorus ore pelletizing
2o
5content improve 8 %.
Claims (1)
1. the method for the pressure ball molding oven dry of a ground phosphate rock, 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 mixing machine, it is characterized in that: the solid substance weight percentage that the intermediate product acid sludge adding two water thing method Wet-process Phosphoric Acid Production is made is 15% ~ 60%, P
2o
5weight percentage be the binding agent of 35% ~ 46%, the proportioning of binding agent and ground phosphate rock weight ratio is 3 ~ 4:6 ~ 7, uniform stirring 4 ~ 6 minutes, obtain the compound that weight percent moisture is 9% ~ 12%, send into the ball that ball press is pressed into diameter 20 ~ 50mm, dry under temperature is 400 ~ 450 DEG C of conditions, the time is 40 ~ 50 minutes again, namely makes the phosphorus ore pelletizing for phosphorus production.
Priority Applications (1)
| 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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| 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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| CN104261368A true CN104261368A (en) | 2015-01-07 |
| CN104261368B CN104261368B (en) | 2016-09-21 |
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| CN201410493117.8A Active 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102701164A (en) * | 2012-01-04 | 2012-10-03 | 张兴华 | Processing method for preparing phosphate rock powder into pellet yellow phosphorus charge |
| CN103466573A (en) * | 2013-09-13 | 2013-12-25 | 成都乐氏化工工程有限公司 | Energy-saving method for preparing yellow phosphorus from low-quality phosphate ore |
| CN103663396A (en) * | 2013-10-26 | 2014-03-26 | 刘静忠 | Balling method using medium- and low-grade phosphate rocks or ground phosphate rocks |
-
2014
- 2014-09-24 CN CN201410493117.8A patent/CN104261368B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102701164A (en) * | 2012-01-04 | 2012-10-03 | 张兴华 | Processing method for preparing phosphate rock powder into pellet yellow phosphorus charge |
| CN103466573A (en) * | 2013-09-13 | 2013-12-25 | 成都乐氏化工工程有限公司 | Energy-saving method for preparing yellow phosphorus from low-quality phosphate ore |
| CN103663396A (en) * | 2013-10-26 | 2014-03-26 | 刘静忠 | Balling method using medium- and low-grade phosphate rocks or ground phosphate rocks |
Non-Patent Citations (1)
| Title |
|---|
| 吴志伟等: "磷矿球团的技术开发和研究", 《磷肥与复肥》, no. 2, 31 December 1994 (1994-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN104261368B (en) | 2016-09-21 |
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