CN104261367A - Short-process decarburization process of powdered rock phosphate for yellow phosphorus production - Google Patents
Short-process decarburization process of powdered rock phosphate for yellow phosphorus production Download PDFInfo
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- CN104261367A CN104261367A CN201410493090.2A CN201410493090A CN104261367A CN 104261367 A CN104261367 A CN 104261367A CN 201410493090 A CN201410493090 A CN 201410493090A CN 104261367 A CN104261367 A CN 104261367A
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Abstract
The invention discloses a short-process decarburization process of powdered rock phosphate for yellow phosphorus production. The short-process decarburization process 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, delivering the powdered rock phosphate into a stirrer, 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 in a rotary dryer at the temperature of 400-500 DEG C, and decomposing parts of carbonate and volatile substances. A phosphorus ore pellet produced by using the process is prepared from the tail gas of a phosphorus furnace by using a simple rotary drying process, so that the decarbonization rate of the process is equal to that of a pelletizing and roasting process, the process flow is shortened, the equipment investment is reduced, the phosphorus furnace is safe and stable in operation, the quantity of phosphorus sludge generated in yellow phosphorus production is greatly reduced, the safety risk of the environment is reduced, and the rate of finished products of yellow phosphorus is increased.
Description
Technical field
The present invention relates to a kind of short route decarbonization process of phosphorus production ground phosphate rock, belong to technical field of phosphorous chemical industry.
Technical background
Carbonate, as one of phosphorus ore concomitant product, in phosphorus production process, can resolve into CO when running into about 700 DEG C temperature at first
2, cause block phosphorus ore to be broken into fine particle, these fine particles very easily block the exit passageway of the phosphorus furnace gas that phosphorus reaction in furnace generates, and cause in phosphorus stove and significantly collapse material and cannot maintain production time serious; Enter the fine particle of condenser system with phosphorus furnace gas, as condensation " nucleus " particle by phosphorus parcel reclaim after, namely become coated mud phosphorus; The generation of this mud phosphorus reduces the yield rate of yellow phosphorus product, and as dangerous solid waste, the subsequent disposal of mud phosphorus exists great Environmental Risk.
Domestic middle-size and small-size phosphorus stove is due to the many restrictions by fund, equipment and state of the art, adopt simply and dry the Technology that lump ore enters stove, pre-treatment is not carried out to the carbonate of association in phosphorus ore, carbon dioxide content can only be selected lower than the phosphorus ore raw material of 5%, otherwise extreme influence will be caused to the normal operation of middle-size and small-size phosphorus stove.Therefore the use of the phosphorus ore raw material that carbonate content is higher is unfavorable for.For the phosphorus ore raw material that carbonate content is higher; existing granulating roasting method technique mainly adopts after broken, screening, drying pre-treatment; again through being milled to granularity for≤0.1mm; add clay as binding agent; granulation in granulating disc; high-temperature roasting, in phosphorus ore raw material, carbonate at high temperature decomposes and partial removal, makes and meets the phosphorus ore pelletizing that phosphorus stove enters stove requirement.The carbon-drop rate of this technology generally only reaches about 60%, and reduces P in phosphorus ore raw material
2o
5content, add SiO
2content, be not suitable for high silicon ground phosphate rock use.
Summary of the invention
The object of this invention is to provide a kind of short route decarbonization process of phosphorus production ground phosphate rock, its binding agent utilizing the intermediate product acid sludge in 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 simple tumble drying technique, produce the phosphorus ore pelletizing for phosphorus production.The method effectively overcomes the tediously long defect of flow process that prior art exists, and proposes a kind of new technical scheme of simple raising carbon-drop rate.
The present invention is achieved through the following technical solutions:
A kind of short route decarbonization process of phosphorus production 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 stirrer, 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 tackiness agent of 35% ~ 46%, the proportioning of tackiness agent and ground phosphate rock weight ratio is 3 ~ 4:6 ~ 7, uniform stirring 4 ~ 6 minutes, obtains the compound that weight percent moisture is 9% ~ 12%, sends into the ball that ball press is pressed into diameter 20 ~ 50mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at 400 ~ 500 DEG C of temperature, the time is 40 ~ 50 minutes, decompose part thereof and volatile matter, namely make the phosphorus ore pelletizing for phosphorus production.
The waste gas that baking operation produces is qualified discharge after dedusting, washing, and fine particle and dust return stirrer and reuse.
The present invention make full use of Production Flow Chart intermediate product processing after 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 simple pretreated ground phosphate rock, uniform stirring mixes in proportion, through pressure ball molding, utilize phosphorus furnace exhaust gas, adopt simple tumble drying technique, produce the phosphorus ore pelletizing for phosphorus production.Without the need to by levigate for ground phosphate rock to granularity≤0.1mm, adopt simple tumble drying technique, without the need to reaching the high temperature of 850 ~ 950 DEG C, the carbon-drop rate of carbon-drop rate and granulating roasting technique is suitable, technical process is shortened, and facility investment reduces, and is especially applicable to middle-size and small-size phosphorus stove and produces.The operating safety of phosphorus stove is stablized, and the mud phosphorus amount in phosphorus production significantly reduces, and Environmental Risk reduces, and improves the yield rate of yellow phosphorus.
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 short route decarbonization process of phosphorus production ground phosphate rock, 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 stirrer, 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%, P
2o
5weight percentage be the tackiness agent of 46%, the proportioning of tackiness agent and ground phosphate rock weight ratio is 3:7, and uniform stirring 5 minutes obtains the compound that weight percent moisture is 9%, send into the ball that ball press is pressed into diameter 30mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at 400 DEG C of temperature, time is 40 minutes, decompose part thereof and volatile matter, namely make the phosphorus ore pelletizing for phosphorus production, carbon-drop rate reaches 65.9%.
Embodiment 2
A kind of short route decarbonization process of phosphorus production ground phosphate rock, 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 stirrer, 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 25%, P
2o
5weight percentage be the tackiness agent of 42%, the proportioning of tackiness agent and ground phosphate rock weight ratio is 3:7, and uniform stirring 5 minutes obtains the compound that weight percent moisture is 10%, send into the ball that ball press is pressed into diameter 40mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at 450 DEG C of temperature, time is 45 minutes, decompose part thereof and volatile matter, namely make the phosphorus ore pelletizing for phosphorus production, carbon-drop rate reaches 66.4 %.
Embodiment 3
A kind of short route decarbonization process of phosphorus production ground phosphate rock, 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 stirrer, 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 35%, P
2o
5weight percentage be the tackiness agent of 38%, the proportioning of tackiness agent and ground phosphate rock weight ratio is 4:6, and uniform stirring 5 minutes obtains the compound that weight percent moisture is 12%, send into the ball that ball press is pressed into diameter 50mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at 500 DEG C of temperature, time is 50 minutes, decompose part thereof and volatile matter, namely make the phosphorus ore pelletizing for phosphorus production, carbon-drop rate reaches 69.1%.
Claims (1)
1. the short route decarbonization process of a phosphorus production 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 stirrer, 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% ~ 35%, P
2o
5weight percentage be the tackiness agent of 30% ~ 46%, the proportioning of tackiness agent and ground phosphate rock weight ratio is 3 ~ 4:6 ~ 7, uniform stirring 4 ~ 6 minutes, obtains the compound that weight percent moisture is 9% ~ 12%, sends into the ball that ball press is pressed into diameter 20 ~ 50mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at 400 ~ 500 DEG C of temperature, the time is 40 ~ 50 minutes, decompose part thereof and volatile matter, namely make the phosphorus ore pelletizing for phosphorus production.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493090.2A CN104261367B (en) | 2014-09-24 | 2014-09-24 | A kind of short route decarbonization process of phosphorus production ground phosphate rock |
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| CN201410493090.2A CN104261367B (en) | 2014-09-24 | 2014-09-24 | A kind of short route decarbonization process of phosphorus production ground phosphate rock |
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| CN104261367A true CN104261367A (en) | 2015-01-07 |
| CN104261367B CN104261367B (en) | 2016-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377423A (en) * | 2020-05-12 | 2020-07-07 | 瓮福（集团）有限责任公司 | Method for producing feed-grade tricalcium phosphate by using low-calorific-value tail gas |
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 CN201410493090.2A patent/CN104261367B/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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377423A (en) * | 2020-05-12 | 2020-07-07 | 瓮福（集团）有限责任公司 | Method for producing feed-grade tricalcium phosphate by using low-calorific-value tail gas |
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| CN104261367B (en) | 2016-09-21 |
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