CN108793263A - A kind of method and ferric oxide red colorant preparing iron oxide red using iron content waste - Google Patents
A kind of method and ferric oxide red colorant preparing iron oxide red using iron content waste Download PDFInfo
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- CN108793263A CN108793263A CN201810770162.1A CN201810770162A CN108793263A CN 108793263 A CN108793263 A CN 108793263A CN 201810770162 A CN201810770162 A CN 201810770162A CN 108793263 A CN108793263 A CN 108793263A
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- iron
- oxide red
- hydroxide
- iron oxide
- waste
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229960005191 ferric oxide Drugs 0.000 title claims abstract description 70
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 69
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000002699 waste material Substances 0.000 title claims abstract description 56
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000001062 red colorant Substances 0.000 title claims abstract description 14
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims abstract description 51
- 235000014413 iron hydroxide Nutrition 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 31
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 54
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 239000002893 slag Substances 0.000 claims description 33
- 239000012065 filter cake Substances 0.000 claims description 29
- 239000000243 solution Substances 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 17
- 230000018044 dehydration Effects 0.000 claims description 16
- 238000006297 dehydration reaction Methods 0.000 claims description 16
- 239000000706 filtrate Substances 0.000 claims description 16
- 238000011010 flushing procedure Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000011259 mixed solution Substances 0.000 claims description 8
- 238000002425 crystallisation Methods 0.000 claims description 7
- 238000005554 pickling Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 claims 1
- 239000011574 phosphorus Substances 0.000 claims 1
- 238000009491 slugging Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- -1 iron ions Chemical class 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000001035 drying Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000005955 Ferric phosphate Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- RFRIWRLHYDZFRS-UHFFFAOYSA-N [Na].[Na].[Na].P(O)(O)(O)=O Chemical compound [Na].[Na].[Na].P(O)(O)(O)=O RFRIWRLHYDZFRS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical group Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Iron (AREA)
Abstract
The present invention relates to technical field of chemical industry, provide a kind of method preparing iron oxide red using iron content waste, include the following steps：3~5h of freeze-day with constant temperature obtains dry powder under the conditions of ferro element in iron-contained waste material being converted to after the mixture of iron hydroxide, ferrous hydroxide or both existing for 120~180 DEG C of oxygen；Dry powder is placed in 400~800 DEG C of 40~180min under confined conditions and obtains γ-Fe2O3.Iron content waste reclamation can have been saved resource by this method, avoid environmental pollution, and the high income of iron oxide red, have higher economic benefit.The present invention also provides a kind of ferric oxide red colorants, through above-mentioned γ-Fe2O3Standardization obtains, which has preferable economic benefit.
Description
Technical field
The present invention relates to technical field of chemical industry, and iron oxide red is prepared using iron content waste in particular to a kind of
Method and ferric oxide red colorant.
Background technology
Currently, the enterprises such as steel pole and automobile specified thin plate, steel rolling were producing in acid cleaning of steel tube cold-drawn, seamless steel pipe, shop
Pickling flush water and sludge solid waste, phosphatization slag solid waste the like waste are generated in journey.And waste total amount is big, it is existing usual
Processing method modes, such mode such as is to fill up, burns and handling waste and the utility contained in waste is not made to wave
It sends out effect due, results in waste of resources, and also can cause environmental pollution.
In consideration of it, special propose the application.
Invention content
The present invention provides a kind of methods preparing iron oxide red using iron content waste, it is intended to improve existing iron content waste
The problem of wasting of resources caused by directly filling or abandon or environmental pollution, while being intended to provide a kind of iron oxide red of high income
Preparation method.
The present invention also provides a kind of iron oxide reds, with preferable economic benefit.
The invention is realized in this way：
A method of iron oxide red being prepared using iron content waste, is included the following steps：
Ferro element in iron-contained waste material is converted into iron hydroxide, ferrous hydroxide or iron hydroxide and ferrous hydroxide
Mixture after existing for 120~180 DEG C of oxygen under the conditions of freeze-day with constant temperature 3~5h obtain dry powder；
Dry powder is placed in 400~800 DEG C of 40~180min under confined conditions and obtains γ-Fe2O3。
Further, further include the γ-Fe to obtaining in preferred embodiments of the present invention2O3It mixes colours.
Further, in preferred embodiments of the present invention, iron-contained waste material is pickling steel pipe, seamless steel pipe, electric power steel
The flushing liquor of bar, thin plate and steel rolling steel plate.
Further, in preferred embodiments of the present invention, the ferro element in iron-contained waste material is converted to iron hydroxide, hydrogen
The mixture of ferrous oxide or iron hydroxide and ferrous hydroxide is that sodium hydroxide solution is added into flushing liquor.
Further, in preferred embodiments of the present invention, iron-contained waste material is phosphatization slag, by the iron in iron-contained waste material
Element is converted to iron hydroxide, ferrous hydroxide or iron hydroxide and the mixture of ferrous hydroxide：By mass percentage
Meter, after 25%~35% phosphatization slag is mixed with 65%~75% water, sodium hydroxide solution is added into mixed solution, makes
Ferro element is obtained to precipitate completely；Filter cake and filtrate are filtered to obtain, filter cake is then iron hydroxide, ferrous hydroxide or iron hydroxide and hydrogen-oxygen
Change ferrous mixture.
Further, further include removal phosphatization slag before mixing phosphatization slag with water in preferred embodiments of the present invention
In mechanical admixture.
Further, in preferred embodiments of the present invention, by 25%~35% phosphatization slag and 65%~75% water
After mixing, during sodium hydroxide solution is added into mixed solution, is heated to mixed solution and be passed through air and make divalent
Iron is oxidized to ferric iron, filters to obtain filter cake and filtrate while hot.
Further, in preferred embodiments of the present invention, filtrate concentration, crystallisation by cooling, filtering means dehydration are obtained into phosphoric acid
Trisodium.
Further, in preferred embodiments of the present invention, crystallisation by cooling temperature is 25~70 DEG C.
A kind of iron oxide red, adopts and is made with the aforedescribed process.
The beneficial effects of the invention are as follows：The present invention prepares iron oxide red by what above-mentioned design obtained using iron content waste
Method can realize the re-using of waste, avoid waste discharge or landfill pair due to preparing iron oxide red using iron content waste
Environment pollutes, simultaneously because drying steps and to turn brilliant step setting reasonable so that the present invention almost can completely will be in waste
Iron recycle be made iron oxide red, realize higher economic benefit.
The iron oxide red that the present invention is obtained by above-mentioned design, due to being prepared using iron content waste using provided by the invention
The method of iron oxide red is made, and has preferably economic value.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Below to the embodiment of the present invention provide it is a kind of using iron content waste prepare iron oxide red method illustrate.
A method of iron oxide red being prepared using iron content waste, is included the following steps：
S1, the mixture that the ferro element in iron-contained waste material is converted to iron hydroxide, ferrous hydroxide or both
3~5h of freeze-day with constant temperature obtains dry powder under the conditions of afterwards existing for 120~180 DEG C of oxygen.
Specifically, it is managed by the flushing liquor of pickling steel pipe, seamless steel pipe, electric power steel pole, thin plate and steel rolling steel plate or just
And the phosphatization slag of automobile specified thin plate phosphatization acts on raw material, the main component of flushing liquor is molysite, and the main component of phosphatization slag is
Ferric phosphate and micro insignificant trbasic zinc phosphate.
When flushing liquor is as raw material, sodium hydroxide or its solution are added into flushing liquor keeps ferro element therein completely heavy
It forming sediment, solution is in neutrality or alkalinity after iron precipitation completely, is added after sodium hydroxide and is measured pH of mixed to judge whether that precipitation is complete,
Then filter solid content be at least 30% filter cake, the solid in the filter cake is iron hydroxide, ferrous hydroxide or above-mentioned
The mixture of the two.
When phosphatization slag is raw material, first by the stone of the mechanical admixture removal in phosphatization slag, such as bulky grain.By quality
Percentage composition meter is added after mixing the phosphatization slag after 25%~35% removal of impurities with 65%~75% water into mixed solution
Sodium hydroxide solution so that ferro element precipitates completely, iron completely precipitation after solution be in neutrality or alkalinity, be added sodium hydroxide after survey
PH of mixed is determined to judge whether that precipitation is complete；It filters to get filtrate and is at least 30% filter cake with solid content, consolidating in this filter cake
Body is iron hydroxide, ferrous hydroxide or both.Preferably, after sodium hydroxide solution precipitation ferro element is added, to mixed
Solution heating is closed, heating temperature is passed through air cavitation for a period of time to 80~100 DEG C so that ferrous oxidising is ferric iron,
Filter cake and filtrate are obtained by filtration while hot after precipitation is complete, contained solid is iron hydroxide solid in the filter cake at this time.Obtained filter
Liquid is concentrated, crystallisation by cooling, filtering means dehydration obtain tertiary sodium phosphate, it is preferable that cooling temperature is 25~70 DEG C.Obtained tricresyl phosphate
Sodium can recycle.
Filter cake of the above two raw material through precipitating or aoxidizing is placed in insulating box, is existed in 120~180 DEG C of oxygen
Under conditions of 3~5h of freeze-day with constant temperature obtain dry powder.The dry powder is iron hydroxide dry powder.Filter cake heats to incite somebody to action under aerobic conditions
What may be contained in filter cake is ferrous oxidising for ferric iron, drying and dehydrating, to carry out follow-up intramolecular dehydration crystallization.
S2,40~180min under confined conditions that dry powder is placed in 400~800 DEG C obtain γ-Fe2O3。
The dry powder that S1 steps obtain is placed in and is turned in brilliant stove, in 400~800 DEG C of 40~180min of dehydration under confined conditions
So that iron hydroxide intramolecular dehydration obtains γ-Fe2O3That is iron oxide red.This step need to be isolated from the outside world, and prevent oxygen from entering and turn
It sets off an explosion in brilliant stove.
Iron oxide red is obtained to be standardized to obtain iron oxide red, standardization refers to mixing colours according to national standards, with
The product of not homochromy grade or class is obtained according to the demand of selling.
Below in conjunction with specific embodiment to it is provided by the invention it is a kind of using iron content waste prepare iron oxide red method into
Row illustrates.
Embodiment 1
A kind of method preparing iron oxide red using iron content waste is present embodiments provided, is included the following steps：
Using the flushing liquor of the pickling steel pipe of steel maker, seamless steel pipe, electric power steel pole, thin plate and steel rolling steel plate as original
Material, into flushing liquor, addition sodium hydroxide keeps precipitation of iron ions in solution complete.Then it is filtered, obtains filter cake, take 500g
Filter cake is placed in insulating box, and freeze-day with constant temperature 5h obtains 149g iron hydroxide dry powder under the conditions of existing for 120 DEG C of oxygen；By hydrogen-oxygen
Change iron dry powder to be placed in high temperature-resistant vessel, is then transferred to and turns in brilliant stove, in 400 DEG C of intramolecular dehydration under confined conditions
180min is transferred out of brilliant furnace cooling but, and standardization obtains 111g ferric oxide red colorants.149g iron hydroxides should theoretically obtain
111.4g iron oxide reds, therefore yield is 99.64%.
Embodiment 2
A kind of method preparing iron oxide red using iron content waste is present embodiments provided, is included the following steps：
Using the flushing liquor of the pickling steel pipe of steel maker, seamless steel pipe, electric power steel pole, thin plate and steel rolling steel plate as original
Material, into flushing liquor, addition sodium hydroxide keeps precipitation of iron ions in solution complete.Then it is filtered, obtains filter cake, take 600g
Filter cake is placed in insulating box, and freeze-day with constant temperature 3h obtains 240g iron hydroxide dry powder under the conditions of existing for 180 DEG C of oxygen；By hydrogen-oxygen
Change iron dry powder to be placed in high temperature-resistant vessel, is then transferred to and turns in brilliant stove, in 450 DEG C of intramolecular dehydration under confined conditions
120min is transferred out of brilliant furnace cooling but, and standardization obtains 178g ferric oxide red colorants.240g iron hydroxides should theoretically obtain
179.4g iron oxide reds, therefore yield is 99.22%.
Embodiment 3
A kind of method preparing iron oxide red using iron content waste is present embodiments provided, is included the following steps：
Using the flushing liquor of the pickling steel pipe of steel maker, seamless steel pipe, electric power steel pole, thin plate and steel rolling steel plate as original
Material, into flushing liquor, addition sodium hydroxide keeps precipitation of iron ions in solution complete.Then it is filtered, obtains filter cake, take 700g
Filter cake is placed in insulating box, and freeze-day with constant temperature 3.5h obtains 356g iron hydroxide dry powder under the conditions of existing for 150 DEG C of oxygen；By hydrogen
Iron oxide dry powder is placed in high temperature-resistant vessel, is then transferred to and is turned in brilliant stove, in 600 DEG C of intramolecular dehydration under confined conditions
60min is transferred out of brilliant furnace cooling but, and standardization obtains 265.0g ferric oxide red colorants.356g iron hydroxides should theoretically obtain
266.16g iron oxide reds, therefore yield is 99.56%.
Embodiment 4
A kind of method preparing iron oxide red using iron content waste is present embodiments provided, is included the following steps：
By steel pipe and automobile specified thin plate phosphatization using the phosphatization slag of the 700g of solid content 40% as raw material, phosphatization is removed
After mechanical admixture in slag, based on mass percentage, phosphatization slag after 25% remove slag is mixed with 75% water, to after mixing
Solution in sodium hydroxide is added so that then pH value of solution 10 carries out being heated to 80 DEG C and is passed through air cavitation oxygen to solution
Change one hour.It filters to get filtrate while hot and filter cake.Filter cake is placed in constant temperature oven and dehydrates 3h, cooling obtains 221.92g
Iron hydroxide dry powder；221.92g dry powder is put into high temperature-resistant vessel and then is transferred among brilliant stove, in 400 DEG C of closed items
Intramolecular dehydration 150min under part is transferred out of brilliant furnace cooling but, and standardization obtains 164.43g ferric oxide red colorants.221.92g hydrogen
Iron oxide should theoretically obtain 165.92g iron oxide reds, therefore yield is 99.1%.By filtrate concentration, it is cooled to 25 DEG C and crystallized
Filter dehydration obtains the Na3PO412H2O crystalline powders of 780g, theoretical deserved 788.14g, therefore yield is 98.97%.
Embodiment 5
A kind of method preparing iron oxide red using iron content waste is present embodiments provided, is included the following steps：
By steel pipe and automobile specified thin plate phosphatization using the phosphatization slag of the 600g of solid content 50% as raw material, phosphatization is removed
After mechanical admixture in slag, based on mass percentage, phosphatization slag after 35% remove slag is mixed with 65% water, to after mixing
Solution in sodium hydroxide is added so that then pH value of solution 10 carries out being heated to 90 DEG C and is passed through air cavitation oxygen to solution
Change one hour.It filters to get filtrate while hot and filter cake.Filter cake is placed in constant temperature oven and dehydrates 4h, cooling obtains 237.7g hydrogen
Iron oxide dry powder；237.7g dry powder is put into high temperature-resistant vessel and then is transferred among brilliant stove, under confined conditions at 450 DEG C
Intramolecular dehydration 180min is transferred out of brilliant furnace cooling but, and standardization obtains 176.65g ferric oxide red colorants.237.7g hydroxide
Iron should theoretically obtain 176.65g iron oxide reds, therefore yield is 99.4%.By filtrate concentration, to be cooled to 25 DEG C of crystallization filterings de-
Water obtains the Na3PO412H2O crystalline powders of 836.84g, theoretical deserved 844.44g, therefore yield is 99.1%.
Embodiment 6
A kind of method preparing iron oxide red using iron content waste is present embodiments provided, is included the following steps：
By steel pipe and automobile specified thin plate phosphatization using the phosphatization slag of the 600g of solid content 40% as raw material, phosphatization is removed
After mechanical admixture in slag, based on mass percentage, phosphatization slag after 30% remove slag is mixed with 70% water, to after mixing
Solution in sodium hydroxide is added so that then pH value of solution 8 carries out being heated to 100 DEG C and is passed through air cavitation oxygen to solution
Change one hour.It filters to get filtrate while hot and filter cake.Filter cake is placed in constant temperature oven and dehydrates 5h, cooling obtains 232.32g
Iron hydroxide dry powder；232.32g dry powder is put into high temperature-resistant vessel and then is transferred among brilliant stove, in 800 DEG C of closed items
Intramolecular dehydration 40min under part is transferred out of brilliant furnace cooling but, and standardization obtains 170.14g ferric oxide red colorants.232.32g hydrogen
Iron oxide should theoretically obtain 172.61g iron oxide reds, therefore yield is 98.6%.By filtrate concentration, it is cooled to 50 DEG C and crystallized
Filter dehydration obtains the Na3PO412H2O crystalline powders of 822.6g, theoretical deserved 825.1g, therefore yield is 99.7%.
Embodiment 7
A kind of method preparing iron oxide red using iron content waste is present embodiments provided, is included the following steps：
By steel pipe and automobile specified thin plate phosphatization using the phosphatization slag of the 600g of solid content 40% as raw material, phosphatization is removed
After mechanical admixture in slag, based on mass percentage, phosphatization slag after 32% remove slag is mixed with 68% water, to after mixing
Solution in sodium hydroxide is added so that then pH value of solution 8 be heated to 90 DEG C to solution and is passed through the oxidation of air cavitation
One hour.It filters to get filtrate while hot and filter cake.Filter cake is placed in constant temperature oven and dehydrates 4.5h, cooling obtains 231.86g
Iron hydroxide dry powder；231.86g dry powder is put into high temperature-resistant vessel and then is transferred among brilliant stove, in 700 DEG C of closed items
Intramolecular dehydration 100min under part is transferred out of brilliant furnace cooling but, and standardization obtains 171.01g ferric oxide red colorants.231.86g hydrogen
Iron oxide should theoretically obtain 172.27g iron oxide reds, therefore yield is 99.27%.By filtrate concentration, it is cooled to 60 DEG C and crystallized
Filter dehydration obtains the Na3PO412H2O crystalline powders of 820.7g, theoretical deserved 823.37g, therefore yield is 99.7%.
It is provided by the invention to prepare oxygen using iron content waste from the point of view of yield by the obtained iron oxide reds of embodiment 1-7
The yield for changing iron oxide red made from the method for iron oxide red is very high, close to 100%, effectively realizes waste resource recycling, avoids
Iron content flushing water and iron content phosphatization slag direct emission or landfill pollution on the environment, while preferable warp can also be created
Ji benefit.Also, when using phosphatization slag as raw material, moreover it can be used to tertiary sodium phosphate crystal powder is prepared, again by production process
Water reuse creates preferable economic benefit.
In conclusion the method provided by the invention for preparing iron oxide red using iron content waste, due to using iron content waste
Iron oxide red is prepared, can realize the re-using of waste, waste discharge or landfill is avoided to pollute the environment, simultaneously because
Drying steps and turn brilliant step setting are reasonable so that the present invention almost can completely recycle the iron in waste with obtained iron oxide
It is red, realize higher economic benefit.
Ferric oxide red colorant provided by the invention, using the side provided by the invention for preparing iron oxide red using iron content waste
Method is made, and has preferably economic value.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method preparing iron oxide red using iron content waste, which is characterized in that include the following steps：
Ferro element in iron-contained waste material is converted into the mixed of iron hydroxide, ferrous hydroxide or iron hydroxide and ferrous hydroxide
3~5h of freeze-day with constant temperature obtains dry powder under the conditions of after conjunction object existing for 120~180 DEG C of oxygen；
The dry powder is placed in 400~800 DEG C of 40~180min under confined conditions and obtains γ-Fe2O3。
2. the method according to claim 1 for preparing iron oxide red using iron content waste, which is characterized in that further include to obtaining
γ-the Fe arrived2O3It is mixed colours to obtain ferric oxide red colorant.
3. the method according to claim 1 for preparing iron oxide red using iron content waste, which is characterized in that the iron content is useless
Gurry is the flushing liquor of pickling steel pipe, seamless steel pipe, electric power steel pole, thin plate and steel rolling steel plate.
4. the method according to claim 3 for preparing iron oxide red using iron content waste, which is characterized in that iron-contained waste material
In ferro element to be converted to iron hydroxide, ferrous hydroxide or iron hydroxide and the mixture of ferrous hydroxide be to the flushing
Sodium hydroxide solution is added in liquid.
5. the method according to claim 1 for preparing iron oxide red using iron content waste, which is characterized in that the iron content is useless
Gurry be phosphatization slag, by the ferro element in the iron-contained waste material be converted to iron hydroxide, ferrous hydroxide or iron hydroxide and
The mixture of ferrous hydroxide is：Based on mass percentage, 25%~35% phosphatization slag is mixed with 65%~75% water
After conjunction, sodium hydroxide solution is added into mixed solution so that ferro element precipitates completely；Filter to obtain filter cake and filtrate, the filter
Cake is then the mixture of iron hydroxide, ferrous hydroxide or iron hydroxide and ferrous hydroxide.
6. the method according to claim 5 for preparing iron oxide red using iron content waste, which is characterized in that by the phosphorus
Slugging further includes the mechanical admixture removed in the phosphatization slag before being mixed with water.
7. the method according to claim 5 for preparing iron oxide red using iron content waste, which is characterized in that
After 25%~35% phosphatization slag is mixed with 65%~75% water, it is molten that sodium hydroxide is added into mixed solution
During liquid, heated to mixed solution and be passed through air make it is ferrous oxidising be ferric iron, filter to obtain the filter cake while hot
And filtrate.
8. the method according to claim 7 for preparing iron oxide red using iron content waste, which is characterized in that by the filtrate
Concentration, crystallisation by cooling, filtering means dehydration obtain tertiary sodium phosphate.
9. the method according to claim 8 for preparing iron oxide red using iron content waste, which is characterized in that crystallisation by cooling temperature
Degree is 25~70 DEG C.
10. a kind of ferric oxide red colorant, which is characterized in that be made using method as claimed in claim 2.
Priority Applications (1)
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| CN113603150A (en) * | 2021-09-23 | 2021-11-05 | 广州大学 | Iron oxide red and preparation method thereof |
| CN115159582A (en) * | 2022-06-17 | 2022-10-11 | 国环危险废物处置工程技术(天津)有限公司 | Method for producing iron oxide red pigment and sodium phosphate by using phosphated slag |
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