CN102502875A - Method for synthersizing iron oxide black by taking lime as raw material - Google Patents
Method for synthersizing iron oxide black by taking lime as raw material Download PDFInfo
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- CN102502875A CN102502875A CN201110305217XA CN201110305217A CN102502875A CN 102502875 A CN102502875 A CN 102502875A CN 201110305217X A CN201110305217X A CN 201110305217XA CN 201110305217 A CN201110305217 A CN 201110305217A CN 102502875 A CN102502875 A CN 102502875A
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- lime
- iron oxide
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- milk
- oxide black
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Abstract
This invention relates to a method for synthersizing iron oxide black by taking lime as a raw material, comprising the following steps: digesting lime and water, adding water after finishing digesting the lime and the water, stirring, curing to form lime milk, and sieving to remove slide impurities; mixing the obtained milk slurry and ferrous sulfate solution, adding water to adjust unit the content of solid is 8-10% to obtain a mixed slurry, adjusting the pH value of the mixed slurry to 7.5-8.5 by using the lime milk, introducing steam to heat to 95-98 DEG C, introducing air to oxidize for 2.5-3.5 hours, comparing the mixed slurry with a standard sample repeatedly, stopping the reaction after the production index of the iron oxide black is achieved, and discharging to obtained the slurry of reaction; sieving the slurry of reaction to remove calcium sulfate impurities, filtering, washing, drying and crushing to obtain the product. The iron oxide black synthesized by adopting the method is superior to the common iron oxide black in physical and chemical indexes and is more superior to common iron oxide black in pigment performance.
Description
Technical field
The present invention relates to a kind of working method of iron oxide black, exactly be a kind of be the synthetic iron black method of raw material with lime.
Background technology
Iron black: molecular formula Fe
3O
4, the chemical name Z 250 belongs to spinel type; Have saturated blue black light black, specific density is 4.73, and good tinting strength is arranged; Very stable to light and atmospheric effect, the iron oxide black also is used for building trade cement because of strong coloring force, good being applied to of light fastness outside the coating industry system device lacquer.But along with the development of the development and progress of society, particularly coating and building material industry, increasingly high to the application performance requirement of material, also more and more to the kind requirement of black iron oxide pigment.
The working method of iron oxide black mainly is that raw material adopts liquid phase method production with the liquid caustic soda at present, good product quality, but because the price of liquid caustic soda is higher; So production cost of products is higher; So developing low-cost, high added value, stay-in-grade iron black product could be suitable for the demand in market.
Summary of the invention
The purpose of this invention is to provide a kind of is the raw material production black iron oxide pigment with lime replacement liquid caustic soda,, institute of the present invention synthetic iron oxide black has good tinting strength, hue range is wide, can satisfy the demand of building materials, cement industry.
Above-mentioned purpose realizes through following scheme:
A kind of is the synthetic iron black method of raw material with lime, it is characterized in that may further comprise the steps:
(1), with the ratio digestion of lime and water in mass ratio 1: 1～1.2; Be 1: 3～3.5 to add water and mix by the mass ratio of lime and water after digestion is accomplished; Cure into the milk of lime slip of solid content 24-36%, after screening out solid impurity, the milk of lime slip that must sieve;
(2), milk of lime slip that step (1) gained is sieved and copperas solution are by FeSO
4: Cao=2.7～mix at 3: 1, adding water adjusting solid content is 8-10%, gets mixed slurry; The pH value that uses milk of lime to regulate mixed slurry is 7.5-8.5; Feed steam and be warmed up to 95-98 ℃, compare repeatedly with standard model after bubbling air oxidation 2.5-3.5 hour again, reach stopped reaction after the iron black productive capacity; Discharging gets reacted slip;
(3), with the reacted slip of step (2) gained sieve remove calcium sulfate impurity after, filter, washing, oven dry promptly gets product after the fragmentation.
Described is the synthetic iron black method of raw material with lime, it is characterized in that: the calcium oxide content of described lime >=95%.
Described is the synthetic iron black method of raw material with lime, it is characterized in that: step (1) is described sieves to crossing 20 mesh sieves, and step (3) is described sieves to crossing 260 mesh sieves.
Described is the synthetic iron black method of raw material with lime, it is characterized in that: need before described copperas solution uses to remove titanium impurity through hydrolysis.
Reaction equation of the present invention is:
Cao+H
2O＝Ca(OH)
2
FeSO
4+2Ca(OH)
2→Fe(OH)
2↓+Ca
2SO
4
4Fe(OH)
2+O
2+2H
2O→4Fe(OH)
3↓
Fe(OH)
2+2Fe(OH)
3→Fe
3O
4↓+4H
2O
Beneficial effect of the present invention is:
1, the present invention replaces liquid caustic soda and ferrous sulfate mixing with lime, and it is synthetic to carry out oxidation under certain condition, and uses the particular form separating impurity; The preparation iron oxide black; Constant product quality, production cost is low can to satisfy the demand of cement building material industry to iron oxide black pigment, and market outlook are good.
2, institute of the present invention synthetic iron oxide black not only is superior to common iron black product on physical and chemical index, and on pigment performance, more is better than common iron black product.
Embodiment
A kind of is the synthetic iron black method of raw material with lime, it is characterized in that may further comprise the steps:
(1), with lime and water in the digestion of 1: 1 ratio of mass ratio, be again to add water at 1: 3 to mix by the mass ratio of lime and water after digestion is accomplished, cure into the milk of lime slip of solid content 30%, after screening out solid impurity, the milk of lime slip that must sieve;
(2), milk of lime slip that step (1) gained is sieved and copperas solution are by FeSO
4: Cao=2.7: 1 mixes, and adding water adjusting solid content is 8-10%, gets mixed slurry; The pH value that uses milk of lime to regulate mixed slurry is 7.5-8.5; Feed steam and be warmed up to 95-98 ℃, the bubbling air oxidation is compared with standard model after 3 hours repeatedly again, reaches stopped reaction after the iron black productive capacity; Discharging gets reacted slip;
(3), with the reacted slip of step (2) gained sieve remove calcium sulfate impurity after, filter, washing, oven dry promptly gets product after the fragmentation.
Described is the synthetic iron black method of raw material with lime, it is characterized in that: the calcium oxide content of described lime >=95%.
Described is the synthetic iron black method of raw material with lime, it is characterized in that: step (1) is described sieves to crossing 20 mesh sieves, and step (3) is described sieves to crossing 260 mesh sieves.
Described is the synthetic iron black method of raw material with lime, it is characterized in that: need before described copperas solution uses to remove titanium impurity through hydrolysis.
Each item index contrast table of the present invention and common iron oxide black
Can know that through comparing institute of the present invention synthetic iron oxide black not only is superior to common iron black product on physical and chemical index, and on pigment performance, more be better than common iron black product.
Claims (4)
1. one kind is the synthetic iron black method of raw material with lime, it is characterized in that may further comprise the steps:
(1), with the ratio digestion of lime and water in mass ratio 1:1～1.2; Be that 1:3～3.5 add water and mix by the mass ratio of lime and water after digestion is accomplished; Cure into the milk of lime slip of solid content 24-36%, after screening out solid impurity, the milk of lime slip that must sieve;
(2), milk of lime slip that step (1) gained is sieved and copperas solution are by FeSO
4: Cao=2.7～3:1 mixes, and adding water adjusting solid content is 8-10%, gets mixed slurry; The pH value that uses milk of lime to regulate mixed slurry is 7.5-8.5; Feed steam and be warmed up to 95-98 ℃, compare repeatedly with standard model after bubbling air oxidation 2.5-3.5 hour again, reach stopped reaction after the iron black productive capacity; Discharging gets reacted slip;
(3), with the reacted slip of step (2) gained sieve remove calcium sulfate impurity after, filter, washing, oven dry promptly gets product after the fragmentation.
2. according to claim 1 is the synthetic iron black method of raw material with lime, it is characterized in that: the calcium oxide content of described lime >=95%.
3. according to claim 1 is the synthetic iron black method of raw material with lime, it is characterized in that: step (1) is described sieves to crossing 20 mesh sieves, and step (3) is described sieves to crossing 260 mesh sieves.
4. according to claim 1 is the synthetic iron black method of raw material with lime, it is characterized in that: need before described copperas solution uses to remove titanium impurity through hydrolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110305217XA CN102502875A (en) | 2011-10-11 | 2011-10-11 | Method for synthersizing iron oxide black by taking lime as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110305217XA CN102502875A (en) | 2011-10-11 | 2011-10-11 | Method for synthersizing iron oxide black by taking lime as raw material |
Publications (1)
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|---|---|
| CN102502875A true CN102502875A (en) | 2012-06-20 |
Family
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|---|---|---|---|
| CN201110305217XA Pending CN102502875A (en) | 2011-10-11 | 2011-10-11 | Method for synthersizing iron oxide black by taking lime as raw material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366729A (en) * | 2015-11-11 | 2016-03-02 | 何定 | Method for preparing ferroferric oxide from copperas through lime as neutralizer |
| CN105600835A (en) * | 2016-04-01 | 2016-05-25 | 合肥学院 | Method for macroscopic preparation of Fe3O4 nanorods |
| CN106082354A (en) * | 2016-06-01 | 2016-11-09 | 中南大学 | A kind of method separating ferroso-ferric oxide and gypsum mix products |
| CN111285507A (en) * | 2020-03-30 | 2020-06-16 | 上海氯德新材料科技有限公司 | Waste residue and waste water reutilization method and device for chlor-alkali plant |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1709985A (en) * | 2005-06-08 | 2005-12-21 | 刘世琦 | Method for producing iron oxide black |
| CN1749173A (en) * | 2004-09-15 | 2006-03-22 | 刘应兵 | Comprehensively utilizing new process for ferrous sulfate |
| US20080299047A1 (en) * | 2003-07-31 | 2008-12-04 | National Cheng Kung University | Method for preparation of water-soluble and dispersed iron oxide nanoparticles and application thereof |
| CN101786670A (en) * | 2010-01-20 | 2010-07-28 | 安徽明珠颜料科技有限公司 | Method for synthesizing iron oxide black through liquid phase oxidation with oxygen |
-
2011
- 2011-10-11 CN CN201110305217XA patent/CN102502875A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080299047A1 (en) * | 2003-07-31 | 2008-12-04 | National Cheng Kung University | Method for preparation of water-soluble and dispersed iron oxide nanoparticles and application thereof |
| CN1749173A (en) * | 2004-09-15 | 2006-03-22 | 刘应兵 | Comprehensively utilizing new process for ferrous sulfate |
| CN1709985A (en) * | 2005-06-08 | 2005-12-21 | 刘世琦 | Method for producing iron oxide black |
| CN101786670A (en) * | 2010-01-20 | 2010-07-28 | 安徽明珠颜料科技有限公司 | Method for synthesizing iron oxide black through liquid phase oxidation with oxygen |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366729A (en) * | 2015-11-11 | 2016-03-02 | 何定 | Method for preparing ferroferric oxide from copperas through lime as neutralizer |
| CN105600835A (en) * | 2016-04-01 | 2016-05-25 | 合肥学院 | Method for macroscopic preparation of Fe3O4 nanorods |
| CN106082354A (en) * | 2016-06-01 | 2016-11-09 | 中南大学 | A kind of method separating ferroso-ferric oxide and gypsum mix products |
| CN111285507A (en) * | 2020-03-30 | 2020-06-16 | 上海氯德新材料科技有限公司 | Waste residue and waste water reutilization method and device for chlor-alkali plant |
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Application publication date: 20120620 |