CN104261367B - A kind of short route decarbonization process of phosphorus production ground phosphate rock - Google Patents
A kind of short route decarbonization process of phosphorus production ground phosphate rock Download PDFInfo
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- CN104261367B CN104261367B CN201410493090.2A CN201410493090A CN104261367B CN 104261367 B CN104261367 B CN 104261367B CN 201410493090 A CN201410493090 A CN 201410493090A CN 104261367 B CN104261367 B CN 104261367B
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Abstract
A kind of short route decarbonization process of phosphorus production ground phosphate rock, 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 blender, add 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, uniform stirring becomes compound, after being pressed into ball, rotary drum drying machine is dried with 400～500 DEG C of temperature, decomposes part thereof and volatile substance.The phosphorus ore pelletizing that the present invention produces, utilize phosphorus furnace exhaust gas, use simple tumble drying technique, carbon-drop rate is suitable with the carbon-drop rate of granulating roasting technique, and technological process is shortened, and equipment investment reduces, the operation safety and stability of phosphorus stove, mud phosphorus amount in phosphorus production is greatly decreased, and Environmental Risk reduces, and improves the yield rate of yellow phosphorus.
Description
Technical field
The present invention relates to the short route decarbonization process of a kind of phosphorus production ground phosphate rock, belong to technical field of phosphorous chemical industry.
Technical background
Carbonate is as one of phosphorus ore accompaniment, during phosphorus production, can resolve into CO when running into about 700 DEG C temperature at first2, cause block phosphorus ore to be broken into fine particle, these fine particles easily block the exit passageway of the phosphorus furnace gas that phosphorus reaction in furnace generates, and significantly collapse and expect and be unable to maintain that production time serious in causing phosphorus stove；Enter the fine particle of condenser system with phosphorus furnace gas, after being reclaimed by phosphorus parcel as " nucleus " particle condensed, 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 treatment 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 technical merit, drying lump ore is used to enter the Technology of stove simply, the carbonate of association in phosphorus ore is not carried out pretreatment, carbon dioxide content can only be selected to be less than the phosphorus ore raw material of 5%, otherwise middle-size and small-size the properly functioning of phosphorus stove will be caused extreme influence.Therefore the use of the phosphorus ore raw material that carbonate content is higher it is unfavorable for.For the phosphorus ore raw material that carbonate content is higher; existing granulating roasting method technique mainly uses after crushing, sieve, drying pretreatment; again through being milled to granularity for≤0.1mm; add clay as binding agent; pelletize in granulating disc; high-temperature roasting, in phosphorus ore raw material, carbonate at high temperature decomposes and partial removal, makes and meets phosphorus stove and enter the phosphorus ore pelletizing of stove requirement.The carbon-drop rate of this technology general only up to about 60%, and reduce P in phosphorus ore raw material2O5Content, add SiO2Content, be not suitable for high silicon ground phosphate rock use.
Summary of the invention
It is an object of the invention to provide the short route decarbonization process of a kind of phosphorus production ground phosphate rock, it utilizes the binding agent that the intermediate product acid sludge in 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 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, it is proposed that the new technical scheme of a kind 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 through crushing, sieve, dry and after homogenizing pretreatment, making weight percent moisture is 5%～8%, the ground phosphate rock of granularity≤10mm, send into blender, 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%, sends into ball press and is pressed into the ball of diameter 20～50mm, send into rotary drum drying machine, utilizing phosphorus furnace exhaust gas, dry at a temperature of 400～500 DEG C, the time is 40～50 minutes, decompose part thereof and volatile substance, i.e. make the phosphorus ore pelletizing for phosphorus production.
Qualified discharge after the waste gas removing dust of baking operation generation, washing, fine particle and dust return blender and reuse.
The present invention make full use of production procedure intermediate product processing 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 simple pretreatment, uniform stirring mixes in proportion, through pressure ball molding, utilize phosphorus furnace exhaust gas, use simple tumble drying technique, produce the phosphorus ore pelletizing for phosphorus production.Without by levigate for ground phosphate rock to granularity≤0.1mm, use simple tumble drying technique, it is not necessary to reach the high temperature of 850～950 DEG C, carbon-drop rate is suitable with the carbon-drop rate of granulating roasting technique, and technological process is shortened, and equipment investment reduces, and is especially suitable for middle-size and small-size phosphorus stove and produces.The operation safety and stability of phosphorus stove, the mud phosphorus amount in phosphorus production is greatly decreased, and Environmental Risk reduces, and improves the yield rate of yellow phosphorus.
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
A kind of short route decarbonization process of phosphorus production ground phosphate rock, phosphorus ore is through crushing, sieve, dry and after homogenizing pretreatment, making weight percent moisture is 5%, the ground phosphate rock of granularity≤10mm, send into blender, 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%, P2O5The binding agent that weight percentage is 46%, binding agent is 3:7 with the proportioning of ground phosphate rock weight ratio, and uniform stirring 5 minutes obtains the compound that weight percent moisture is 9%, send into ball press and be pressed into the ball of diameter 30mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at a temperature of 400 DEG C, time is 40 minutes, decomposing part thereof and volatile substance, i.e. 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 through crushing, sieve, dry and after homogenizing pretreatment, making weight percent moisture is 7%, the ground phosphate rock of granularity≤10mm, send into blender, 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 25%, P2O5The binding agent that weight percentage is 42%, binding agent is 3:7 with the proportioning of ground phosphate rock weight ratio, and uniform stirring 5 minutes obtains the compound that weight percent moisture is 10%, send into ball press and be pressed into the ball of diameter 40mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at a temperature of 450 DEG C, time is 45 minutes, decomposing part thereof and volatile substance, i.e. 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 through crushing, sieve, dry and after homogenizing pretreatment, making weight percent moisture is 8%, the ground phosphate rock of granularity≤10mm, send into blender, 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 35%, P2O5The binding agent that weight percentage is 38%, binding agent is 4:6 with the proportioning of ground phosphate rock weight ratio, and uniform stirring 5 minutes obtains the compound that weight percent moisture is 12%, send into ball press and be pressed into the ball of diameter 50mm, send into rotary drum drying machine, utilize phosphorus furnace exhaust gas, dry at a temperature of 500 DEG C, time is 50 minutes, decomposing part thereof and volatile substance, i.e. make the phosphorus ore pelletizing for phosphorus production, carbon-drop rate reaches 69.1%.
Claims (1)
- null1. the short route decarbonization process of a phosphorus production ground phosphate rock，Phosphorus ore is through broken、Screening、Dry and after homogenizing pretreatment，Making weight percent moisture is 5%～8%，The ground phosphate rock of granularity≤10mm，Send into blender，Its distinguishing characteristics is: 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%～35%，The weight percentage of P2O5 is the binding agent of 30%～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，Send into rotary drum drying machine，Utilize phosphorus furnace exhaust gas，Dry at a temperature of 400～500 DEG C，Time is 40～50 minutes，Decompose part thereof and volatile substance，I.e. make the phosphorus ore pelletizing for phosphorus production.
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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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| 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 |
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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 |
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