CN103395761B - 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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CN103395761B
CN103395761B CN201310322348.8A CN201310322348A CN103395761B CN 103395761 B CN103395761 B CN 103395761B CN 201310322348 A CN201310322348 A CN 201310322348A CN 103395761 B CN103395761 B CN 103395761B
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iron oxide
utilizing
phosphatization slag
phosphoric acid
processing
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CN103395761A (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 treatment 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, and it is one of Phosphating Solution and metallic surface inevitable outcome when there is chemical reaction, and its reaction mechanism is metal Fe and H 3pO 4after contact, on surface, chemical reaction occurs, reaction generates Fe (H 2pO 4) 2and H 2, H 2discharge in the form of a vapor, under there is the condition of oxygen element in atmosphere, Fe (H 2pO 4) 2react further, reaction obtains phosphatization slag FePO 4and H 2o.
When steel part contacts with Phosphating Solution, first iron is by acid dissolve, and the iron ion part be dissolved down participates in film formation reaction and forms phosphatize phosphate coat composition, and another part iron ion is then oxidized to tertiary iron phosphate precipitation, separates out and form phosphatization slag from solution.In addition, if reaction process control is improper, will neutralizing effect be caused, cause excessive zinc phosphate precipitating out, form rich zinc phosphatization slag.
There is no the enterprise of a special disposal phosphatization slag waste at present on the market, phosphatization slag is named as danger wastes at home, only have have individually the enterprise of qualification can reclaim it, burn, landfill, mainly directly discarded by as production refuse, cause secondary pollution, the wasting of resources.In recent years along with the enhancing of people's environmental consciousness, the every regulation both at home and abroad about refuse process and regeneration is progressively implemented, and requires also more and more higher to treatment of wastes produced.A kind of very effective method is put together by phosphatization slag, extracts metallic zinc wherein, and last waste residue then can be used for building the road and free from environmental pollution.Therefore, effective process of phosphatization slag and manipulation of regeneration will be brand-new developing direction.
[summary of the invention]
The object of the invention is to utilize the offal treatment of phosphatization slag, save phosphor resource, use manpower and material resources sparingly, environmental protect, obtains economic benefit simultaneously, provides 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, react 1 hour, make raw material complete reaction, 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, adds H simultaneously 3pO 4, when being adjusted to PH=7 neutral state, leave standstill 15 minutes, then by screen filtration, filtrate is Na nh 3-npO 4, filter cake is dried and is obtained red powder Fe 2o 3, packaging process is red iron oxide product;
D. according to needing to add H 3pO 4or NaOH makes Na nh 3-npO 4
The H of different amount is added to above-mentioned filtrate 3pO 4or NaOH generates Na nh 3-npO 4solution, makes the different phosphate product formed through crystallization, separation, packaging.
FePO in described phosphatization slag 4content is 50%, described Fe (OH) 3be converted into Fe 2o 3heat-preserving range be 80 ~ 90 DEG C, described filter screen is 60 eye mesh screens, described Na nh 3-npO 4for the phosphate product of difference composition, add H 3pO 4, during PH=4, n=1, Na nh 3-npO 4for Na h 2pO 4; Add NaOH, during PH=8.4 ~ 8.6, n=2, Na nh 3-npO 4for Na 2hPO 4; During Na/p=3.24, n=3, Na nh 3-npO 4for Na 3pO 4.
Processing and utilizing phosphatization slag of the present invention is adopted to become the method process phosphatization slag of phosphoric acid salt and red iron oxide, can make every year several ten thousand tons abandon, to burn and the waste of landfill is recycled, save a large amount of phosphor resources, use manpower and material resources sparingly financial resources, active response national policy, the environmental protect protection energy; Phosphoric acid salt and the red iron oxide product of present method generation simultaneously meet national standard completely, are applicable to cleaning industry and dyeization industry, have huge market capacity, abundant economic benefit.
[accompanying drawing explanation]
Fig. 1 is process flow sheet of the present invention;
Fig. 1 is specified to be Figure of abstract of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, the invention will be further described, and the structure of this device and principle are very clearly concerning the people of this specialty.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be 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, react 1 hour, make raw material complete reaction, 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, adds H simultaneously 3pO 4, when being adjusted to PH=7 neutral state, leave standstill 15 minutes, then by screen filtration, filtrate is Na nh 3-npO 4, filter cake is dried and is obtained red powder Fe 2o 3, packaging process is red iron oxide product;
D. according to needing to add H 3pO 4or NaOH makes Na nh 3-npO 4
The H of different amount is added to above-mentioned filtrate 3pO 4or NaOH generates Na nh 3-npO 4solution, makes the different phosphate product formed through crystallization, separation, packaging.
FePO in phosphatization slag 4content is 50%, Fe (OH) 3be converted into Fe 2o 3heat-preserving range be 80 ~ 90 DEG C, filter screen is 60 eye mesh screens, Na nh 3-npO 4for the phosphate product of difference composition, add H 3pO 4, during PH=4, n=1, Na nh 3-npO 4for Na h 2pO 4; Add NaOH, during PH=8.4 ~ 8.6, n=2, Na nh 3-npO 4for Na 2hPO 4; During Na/p=3.24, n=3, Na nh 3-npO 4for Na 3pO 4.

Claims (6)

1. processing and utilizing phosphatization slag becomes a 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, react 1 hour, make raw material complete reaction, 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, adds H simultaneously 3pO 4, when being adjusted to pH=7 neutral state, leave standstill 15 minutes, then by screen filtration, filtrate is Na nh 3-npO 4, filter cake is dried and is obtained red powder Fe 2o 3, packaging process is red iron oxide product;
D. according to needing to add H 3pO 4or NaOH makes Na nh 3-npO 4
The H of different amount is added to above-mentioned filtrate 3pO 4or NaOH generates Na nh 3-npO 4solution, makes the different phosphate product formed through crystallization, separation, packaging.
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 DEG C.
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 4for the phosphate product of difference composition, 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 4for the phosphate product of difference composition, add NaOH, during pH=8.4 ~ 8.6, n=2, Na nh 3-npO 4for Na 2hPO 4; During 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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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
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
CN105776165B (en) * 2016-02-29 2018-03-23 嘉兴双军环保科技有限公司 A kind of method for preparing ferric phosphate using phosphatization waste residue extraction
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
CN106517145B (en) * 2016-11-11 2019-05-17 上海第二工业大学 A method of iron-based nitrogen-doped carbon nanometer pipe is prepared by raw material of phosphatization slag
CN107555577B (en) * 2017-07-20 2020-06-26 南通玛盛环保科技有限公司 Preparation method of iron powder for neutral Fenton reagent by using phosphated slag as 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
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

Citations (2)

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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

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