CN103395761A - Method for preparing phosphate and iron oxide red by utilizing phosphated residue - Google Patents

Method for preparing phosphate and iron oxide red by utilizing phosphated residue Download PDF

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Publication number
CN103395761A
CN103395761A CN2013103223488A CN201310322348A CN103395761A CN 103395761 A CN103395761 A CN 103395761A CN 2013103223488 A CN2013103223488 A CN 2013103223488A CN 201310322348 A CN201310322348 A CN 201310322348A CN 103395761 A CN103395761 A CN 103395761A
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iron oxide
utilizing
phosphatization slag
processing
phosphoric acid
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CN103395761B (en
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丁忠华
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Abstract

The invention relates to the field of phosphated residue treatment, and in particular relates to a method for preparing phosphate and iron oxide red by utilizing phosphated residue. The iron phosphate phosphated residue is treated and reutilized by using sodium carbonate, and the method comprises the steps of reacting, insulating and filtering, separating solid and liquid to obtain iron oxide red, and adding phosphoric acid or sodium hydroxide to prepare phosphate. A brand-new development direction for effectively treating and regenerating the phosphated residue can be provided. According to the method for treating the phosphated residue, tens of thousands of waste can be recycled every year, massive phosphor resource can be saved, manpower, materials and financial resources can be saved, environment can be improved, and resources can be protected; and the produced phosphate and iron oxide red are completely in accordance with the national standard, are suitable for the washing industry and dyeing industry, has huge market capacity and great economical benefit.

Description

A kind of processing and utilizing phosphatization slag becomes the method for phosphoric acid salt and red iron oxide
[technical field]
The present invention relates to phosphatization slag process field, specifically a kind of processing and utilizing phosphatization slag becomes the method for phosphoric acid salt and red iron oxide.
[background technology]
The main component of phosphatization slag is the mixture of zinc phosphate and tertiary iron phosphate, one of inevitable outcome when it is Phosphating Solution and metallic surface generation chemical reaction, and its reaction mechanism is metal Fe and H 3PO 4After contact, chemical reaction occurs on surface, reaction generates Fe (H 2PO 4) 2And H 2, H 2Form with gaseous state discharges, and in air, has under the condition of oxygen element Fe (H 2PO 4) 2Further react, reaction obtains phosphatization slag FePO 4And H 2O.
When steel part contacted with Phosphating Solution, at first iron was dissolved by acid, and an iron ion part that is dissolved down participates in film formation reaction and forms the phosphatize phosphate coat composition, and another part iron ion is oxidized to the tertiary iron phosphate precipitation, from solution, separating out, formed the phosphatization slag.In addition, improper if reaction process is controlled, will cause neutralizing effect, cause excessive zinc phosphate precipitating out, form rich zinc phosphatization slag.
The enterprise that there is no on the market at present a special disposal phosphatization slag waste, the phosphatization slag is named as danger wastes at home, only has that the enterprise that qualification is arranged individually can reclaim it, burning, landfill, mainly is used as to produce refuse and directly discard, cause secondary pollution, the wasting of resources.Along with the enhancing of people's environmental consciousness, about every rules of refuse processing and regeneration, progressively implement both at home and abroad in recent years, to treatment of wastes produced, require also more and more higher.A kind of very effective method is that the phosphatization slag is put together, and extracts metallic zinc wherein, and last waste residue can be used for building the road and be free from environmental pollution.Therefore, effective processing of phosphatization slag and manipulation of regeneration will be brand-new developing direction.
[summary of the invention]
The object of the invention is to phosphatization slag offal treatment utilization, save phosphor resource, use manpower and material resources sparingly, improve environment, obtain simultaneously economic benefit, provide a kind of processing and utilizing phosphatization slag to become the method for phosphoric acid salt and red iron oxide.
For achieving the above object, design a kind of method that processing and utilizing phosphatization slag becomes phosphoric acid salt and red iron oxide, the main component of phosphatization slag is FePO 4, it is characterized in that concrete processing and utilizing method steps is as follows:
A. Na2CO3 and FePO 4Reaction
To FePO 4In add Na 2CO 3To PH=12, reacted 1 hour, make the raw material complete reaction, the reactive chemistry reactional equation is:
2FePO 4 + 3Na 2CO 3 + 3H 2O = 2Fe(OH) 3 + 2Na 3PO 4 + 3CO 2
B. Fe (OH) 3Be converted into Fe 2O 3
Above-mentioned reaction product, under stable temperature range, is incubated 5 hours, makes Fe (OH) 3Be converted into Fe 2O 3
C. solution adds H 3PO 4, regulate PH=7, solid-liquid separation Fe 2O 3With Na nH 3-nPO 4, n=1 ~ 3
Above-mentioned reaction product is stirred, add simultaneously H 3PO 4, while being adjusted to the PH=7 neutral state, standing 15 minutes, then by screen filtration, filtrate is Na nH 3-nPO 4, the filter cake oven dry obtains red powder Fe 2O 3, packing is processed and is the red iron oxide product;
D. according to adding H 3PO 4Or NaOH makes Na nH 3-nPO 4
The H that adds different amounts to above-mentioned filtrate 3PO 4Or NaOH generates Na nH 3-nPO 4Solution, make the different phosphate product that form through crystallization, separation, packing.
FePO in described phosphatization slag 4Content is 50%, described Fe (OH) 3Be converted into Fe 2O 3Heat-preserving range be 80 ~ 90 ℃, described filter screen is 60 eye mesh screens, described Na nH 3-nPO 4Phosphate product for difference forms, add H 3PO 4, during PH=4, n=1, Na nH 3-nPO 4For Na H 2PO 4Add NaOH, PH=8.4 ~ 8.6 o'clock, n=2, Na nH 3-nPO 4For Na 2HPO 4During Na/p=3.24, n=3, Na nH 3-nPO 4For Na 3PO 4.
Adopt processing and utilizing phosphatization slag of the present invention to become the method for phosphoric acid salt and red iron oxide to process the phosphatization slag, can make annual several ten thousand tons abandon, the waste of burning and landfill is recycled, save a large amount of phosphor resources, financial resources use manpower and material resources sparingly, the active response national policy, improve the environment protection energy; Phosphoric acid salt and the red iron oxide product of present method generation simultaneously meet national standard fully, are applicable to cleaning industry and dying industry, have huge market capacity, abundant economic benefit.
[accompanying drawing explanation]
Fig. 1 is process flow sheet of the present invention;
Specifying Fig. 1 is Figure of abstract of the present invention.
[embodiment]
The invention will be further described below in conjunction with accompanying drawing, and the structure of this device and principle are very clearly concerning this professional people.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, a kind of processing and utilizing phosphatization slag of invention becomes the method for phosphoric acid salt and red iron oxide, and the main component of phosphatization slag is FePO 4, concrete processing and utilizing method steps is as follows:
A. Na 2CO 3With FePO 4Reaction
To FePO 4In add Na 2CO 3To PH=12, reacted 1 hour, make the raw material complete reaction, the reactive chemistry reactional equation is:
2FePO 4 + 3Na 2CO 3 + 3H 2O = 2Fe(OH) 3 + 2Na 3PO 4 + 3CO 2
B. Fe (OH) 3Be converted into Fe 2O 3
Above-mentioned reaction product, under stable temperature range, is incubated 5 hours, makes Fe (OH) 3Be converted into Fe 2O 3
C. solution adds H 3PO 4, regulate PH=7, solid-liquid separation Fe 2O 3With Na nH 3-nPO 4, n=1 ~ 3
Above-mentioned reaction product is stirred, add simultaneously H 3PO 4, while being adjusted to the PH=7 neutral state, standing 15 minutes, then by screen filtration, filtrate is Na nH 3-nPO 4, the filter cake oven dry obtains red powder Fe 2O 3, packing is processed and is the red iron oxide product;
D. according to adding H 3PO 4Or NaOH makes Na nH 3-nPO 4
The H that adds different amounts to above-mentioned filtrate 3PO 4Or NaOH generates Na nH 3-nPO 4Solution, make the different phosphate product that form through crystallization, separation, packing.
FePO in the phosphatization slag 4Content is 50%, Fe (OH) 3Be converted into Fe 2O 3Heat-preserving range be 80 ~ 90 ℃, filter screen is 60 eye mesh screens, Na nH 3-nPO 4Phosphate product for difference forms, add H 3PO 4, during PH=4, n=1, Na nH 3-nPO 4For Na H 2PO 4Add NaOH, PH=8.4 ~ 8.6 o'clock, n=2, Na nH 3-nPO 4For Na 2HPO 4During Na/p=3.24, n=3, Na nH 3-nPO 4For Na 3PO 4.

Claims (6)

1. a processing and utilizing phosphatization slag becomes the method for phosphoric acid salt and red iron oxide, and the main component of phosphatization slag is FePO 4, it is characterized in that concrete processing and utilizing method steps is as follows:
A. Na 2CO 3With FePO 4Reaction
To FePO 4In add Na 2CO 3To PH=12, reacted 1 hour, make the raw material complete reaction, the reactive chemistry reactional equation is:
2FePO 4 + 3Na 2CO 3 + 3H 2O = 2Fe(OH) 3 + 2Na 3PO 4 + 3CO 2
B. Fe (OH) 3Be converted into Fe 2O 3
Above-mentioned reaction product, under stable temperature range, is incubated 5 hours, makes Fe (OH) 3Be converted into Fe 2O 3
C. solution adds H 3PO 4, regulate PH=7, solid-liquid separation Fe 2O 3With Na nH 3-nPO 4, n=1 ~ 3
Above-mentioned reaction product is stirred, add simultaneously H 3PO 4, while being adjusted to the PH=7 neutral state, standing 15 minutes, then by screen filtration, filtrate is Na nH 3-nPO 4, the filter cake oven dry obtains red powder Fe 2O 3, packing is processed and is the red iron oxide product;
D. according to adding H 3PO 4Or NaOH makes Na nH 3-nPO 4
The H that adds different amounts to above-mentioned filtrate 3PO 4Or NaOH generates Na nH 3-nPO 4Solution, make the different phosphate product that form through crystallization, separation, packing.
2. a kind of processing and utilizing phosphatization slag as claimed in claim 1 becomes the method for phosphoric acid salt and red iron oxide, it is characterized in that FePO in described phosphatization slag 4Content is 50%.
3. a kind of processing and utilizing phosphatization slag as claimed in claim 1 becomes the method for phosphoric acid salt and red iron oxide, it is characterized in that described Fe (OH) 3Be converted into Fe 2O 3Heat-preserving range be 80 ~ 90 ℃.
4. a kind of processing and utilizing phosphatization slag as claimed in claim 1 becomes the method for phosphoric acid salt and red iron oxide, it is characterized in that described filter screen is 60 eye mesh screens.
5. a kind of processing and utilizing phosphatization slag as claimed in claim 1 becomes the method for phosphoric acid salt and red iron oxide, it is characterized in that described Na nH 3-nPO 4Phosphate product for difference forms, add H 3PO 4, during PH=4, n=1, Na nH 3-nPO 4For Na H 2PO 4.
6. a kind of processing and utilizing phosphatization slag as claimed in claim 1 becomes the method for phosphoric acid salt and red iron oxide, it is characterized in that described Na nH 3-nPO 4Phosphate product for difference forms, add NaOH, PH=8.4 ~ 8.6 o'clock, n=2, Na nH 3-nPO 4For Na 2HPO 4During Na/p=3.24, n=3, Na nH 3-nPO 4For Na 3PO 4.
CN201310322348.8A 2013-07-29 2013-07-29 Method for preparing phosphate and iron oxide red by utilizing phosphated residue Expired - Fee Related CN103395761B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104118853A (en) * 2014-06-20 2014-10-29 马鞍山市华清环保工程有限公司 Metal surface treatment phosphated residue comprehensive utilization method
CN104386662A (en) * 2014-11-03 2015-03-04 贵州省化工研究院 Method for coproducing tricalcium phosphate and ferric oxide by virtue of phosphated waste residues
CN105776165A (en) * 2016-02-29 2016-07-20 嘉兴市净源循环环保科技有限公司 Method for extracting and preparing iron phosphate with phosphorization slag
CN105778585A (en) * 2016-04-29 2016-07-20 大连碧城环保科技股份有限公司 Method for producing waterborne coating with phosphated residue
CN106517145A (en) * 2016-11-11 2017-03-22 上海第二工业大学 Method for preparing iron-based nitrogen doped carbon nanotubes from phosphating slag
CN107555577A (en) * 2017-07-20 2018-01-09 南通玛盛环保科技有限公司 A kind of preparation method by the use of phosphatization slag as the neutral Fenton reagent of raw material
CN107720715A (en) * 2017-09-28 2018-02-23 湖南华菱节能环保科技有限公司 A kind of method for preparing battery ferric phosphate using phosphatization slag for raw material
CN108793263A (en) * 2018-07-13 2018-11-13 常州润德石墨科技有限公司 A kind of method and ferric oxide red colorant preparing iron oxide red using iron content waste
CN109694049A (en) * 2019-01-23 2019-04-30 瓮福（集团）有限责任公司 A kind of processing method containing zinc, calcium, iron phosphatization slag
CN113305131A (en) * 2021-05-25 2021-08-27 马鞍山市华清环保工程有限公司 Metal surface treatment phosphorization sediment recovery comprehensive utilization production line

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102180521A (en) * 2011-03-15 2011-09-14 浙江工业大学 Method for preparing ferric oxide red pigment by using nitryl chloride tail gas
CN102205953A (en) * 2011-05-05 2011-10-05 湖北浩元材料科技有限公司 Method for preparing spherical iron phosphate for lithium iron phosphate cell material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102180521A (en) * 2011-03-15 2011-09-14 浙江工业大学 Method for preparing ferric oxide red pigment by using nitryl chloride tail gas
CN102205953A (en) * 2011-05-05 2011-10-05 湖北浩元材料科技有限公司 Method for preparing spherical iron phosphate for lithium iron phosphate cell material

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104118853A (en) * 2014-06-20 2014-10-29 马鞍山市华清环保工程有限公司 Metal surface treatment phosphated residue comprehensive utilization method
CN104386662A (en) * 2014-11-03 2015-03-04 贵州省化工研究院 Method for coproducing tricalcium phosphate and ferric oxide by virtue of phosphated waste residues
CN104386662B (en) * 2014-11-03 2016-04-20 贵州省化工研究院 A kind of method utilizing phosphatization waste residue to produce tricalcium phosphate co-production ferric oxide
CN105776165A (en) * 2016-02-29 2016-07-20 嘉兴市净源循环环保科技有限公司 Method for extracting and preparing iron phosphate with phosphorization slag
CN105778585A (en) * 2016-04-29 2016-07-20 大连碧城环保科技股份有限公司 Method for producing waterborne coating with phosphated residue
CN106517145A (en) * 2016-11-11 2017-03-22 上海第二工业大学 Method for preparing iron-based nitrogen doped carbon nanotubes from phosphating slag
CN107555577A (en) * 2017-07-20 2018-01-09 南通玛盛环保科技有限公司 A kind of preparation method by the use of phosphatization slag as the neutral Fenton reagent of raw material
CN107720715A (en) * 2017-09-28 2018-02-23 湖南华菱节能环保科技有限公司 A kind of method for preparing battery ferric phosphate using phosphatization slag for raw material
CN107720715B (en) * 2017-09-28 2019-04-30 湖南华菱节能环保科技有限公司 A method of battery ferric phosphate is prepared using phosphatization slag for raw material
CN108793263A (en) * 2018-07-13 2018-11-13 常州润德石墨科技有限公司 A kind of method and ferric oxide red colorant preparing iron oxide red using iron content waste
CN109694049A (en) * 2019-01-23 2019-04-30 瓮福（集团）有限责任公司 A kind of processing method containing zinc, calcium, iron phosphatization slag
CN109694049B (en) * 2019-01-23 2021-10-29 瓮福（集团）有限责任公司 Treatment method of phosphated slag containing zinc, calcium and iron
CN113305131A (en) * 2021-05-25 2021-08-27 马鞍山市华清环保工程有限公司 Metal surface treatment phosphorization sediment recovery comprehensive utilization production line

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