CN103193277A - Method for preparing iron oxide red pigment through copperas - Google Patents
Method for preparing iron oxide red pigment through copperas Download PDFInfo
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- CN103193277A CN103193277A CN2013101173874A CN201310117387A CN103193277A CN 103193277 A CN103193277 A CN 103193277A CN 2013101173874 A CN2013101173874 A CN 2013101173874A CN 201310117387 A CN201310117387 A CN 201310117387A CN 103193277 A CN103193277 A CN 103193277A
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- Prior art keywords
- ferric oxide
- oxide red
- ferrous sulfate
- green vitriol
- drying
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- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 title claims abstract description 74
- 229910000359 iron(II) sulfate Inorganic materials 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 29
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000001054 red pigment Substances 0.000 title abstract 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229960005191 ferric oxide Drugs 0.000 claims abstract description 50
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 31
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 18
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 239000001062 red colorant Substances 0.000 claims description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 22
- 238000001354 calcination Methods 0.000 claims description 20
- 239000013078 crystal Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 16
- 239000000706 filtrate Substances 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 238000006396 nitration reaction Methods 0.000 claims description 11
- 238000001953 recrystallisation Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000001117 sulphuric acid Substances 0.000 claims description 5
- 235000011149 sulphuric acid Nutrition 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 abstract description 6
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010936 titanium Substances 0.000 abstract description 2
- 229910052719 titanium Inorganic materials 0.000 abstract description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000011572 manganese Substances 0.000 abstract 1
- 239000012047 saturated solution Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 239000001166 ammonium sulphate Substances 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000001038 titanium pigment Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- -1 iron ion Chemical class 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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- Compounds Of Iron (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
The invention relates to a method for preparing an iron oxide red pigment through copperas, and belongs to the field of microwave heating application and material preparation. The method mainly comprises the following preparation processes of: recrystallizing the copperas; adding strong conductive phase ferric oxide; drying ferrous sulfate; roasting and decomposing; washing iron oxide red by water; and drying, wherein the dissolving temperature in the recrystallizing process is controlled to 70 to 90 DEG C; adding few iron scraps; adjusting the pH (Potential Of Hydrogen) of the saturated solution to 2.0 to 2.5 by sulfur-phosphorus mixed acid; removing few impurities such as titanium, manganese and magnesium; adding strong conductive phase ferric oxide red to the obtained purified ferrous sulfate; due to the characteristics of the microwave of fast heating and selective heating, heating by the microwave to remove the free water and the crystallization water; finally carrying out the roasting at 800 to 900 DEG C, absorbing the smoke for preparing sulfuric acid; washing the product by water and drying, thus the first-class oxide red pigment is obtained. According to the method for preparing the iron oxide red pigment through the copperas, the microwave is utilized for uniformly heating, thus the thermal efficiency is high, the cleanness can be ensured, and no pollution is brought; and the recrystallizing and impurity removing processes are introduced prior to roasting, thus the sulfur trioxide generated in the process can be absorbed and used for preparing the sulfuric acid.
Description
Technical field
The present invention relates to the method that a kind of green vitriol prepares ferric oxide red colorant, belong to microwave heating application and field of material preparation.
Background technology
Ferrous sulfate claims green vitriol again, is the solid waste in the sulfuric acid method titanium pigment production process, and every production 1 t titanium dioxide will produce the iron vitriol FeSO of 3t～3.2t
47H
2O.According to statistics, domestic green vitriol output surpassed 3,000,000 tons in 2010, if so huge green vitriol is not handled, not only wasted limited resources, and can pollute environment.Green vitriol mainly is to be used as fodder additives at present, water purification agent, and fertilizer, but consumption is all less.If be used for the production high added value ferric oxide red colorant not only could address the above problem, and can bring considerable economic.
Ferric oxide red colorant is as a kind of conventional pigment, it has higher chemistry and physical stability, the various superperformance such as nontoxic of high covering power and color, be widely used in fields such as rubber, paint, pottery, papermaking, printing ink paint, ferric oxide red colorant is the second largest mineral dye that is only second to titanium dioxide, the ferric oxide red colorant market requirement is big at present, is worth height, and market outlook are good.
Known ferric oxide red colorant production method mainly contains wet method and dry method.Studied by-product of white titanium pigment green vitriol oxidizing roasting method as Xia Jupei etc. and produced iron oxide red, it adopts directly calcines the back to green vitriol and obtains red iron oxide, and impurity is residual more in this method products obtained therefrom; Employing dry method such as Xiaxin's stamen is produced ferric oxide red colorant in addition, and it adopts the multistep calcining, the 4h that reaches consuming time, and owing to obtain the relatively poor coating treatment step that increased of product color.Chinese patent CN1903735A in addition
Disclose the method with ferrous sulfate production red iron oxide, it adopts in the ammoniacal liquor and the method production red iron oxide of dioxygen oxidation, obtains red iron oxide content 98%, and it produces ammonium sulphate waste liquor still needs further processing.
Summary of the invention
The present invention proposes the method that a kind of green vitriol prepares ferric oxide red colorant, ferric oxide red colorant foreign matter content height, long shortcoming and the unmanageable drawback of wet process technique ammonium sulphate waste liquor of calcination time at the existence of calcining dry method, utilize the incomparable advantages of conventional type of heating such as microwave heating is even, thermo-efficiency is high, cleanliness without any pollution, by introducing recrystallization removal of impurities operation before calcining, and the sulphur trioxide that absorption process produces is made sulfuric acid.
Technical scheme concrete grammar of the present invention is realized as follows:
(1) under 70～90 ℃ temperature condition, industrial green vitriol and distilled water are mixed according to solid-to-liquid ratio 0.2～0.3:1kg/L and stir 40～60min, obtain copperas solution after the filtration;
(2) in copperas solution, add iron filings according to solid-to-liquid ratio 0.02～0.03:1kg/L, pH value with sulphur-phosphorus nitration mixture regulator solution is 2.0～2.5, then solution is heated to more than 70 ℃ and the ferrous sulfate filtrate of filtering purely, ferrous sulfate filtrate obtains the ferrous sulfate crystal through naturally cooling recrystallization after-filtration, and filtrate is returned the industrial green vitriol of dissolving;
(3) according to strong conductive phase ferric oxide: the ferrous sulfate crystal mass is than 1～3:9～7, be added into strong conductive phase ferric oxide in the ferrous sulfate crystal that obtains in the step (2) and mix, place the microwave environment calcining and decomposing then, regulating microwave output power 6～15kW, is 500～1200m with temperature of charge control at 800～900 ℃, the air amount of blasting
3/ h, calcining obtains croci behind 20～40min, flue gas through exhausting system feed sulphuric acid soln absorb after for the production of sulfuric acid.
(4) croci that step (3) calcining is prepared obtains ferric oxide red colorant through washing and drying.Characterize by analysis, the red iron oxide product reaches the requirement of GB GB1863-89 first grade.
Described iron filings are the chemical pure iron powder, and granularity is 200～250 orders.
Described sulphur-phosphorus nitration mixture obtains according to the mass ratio 1:1.5 mixed of sulfuric acid and phosphoric acid, and sulfuric acid and phosphoric acid are technical grade.
Described strong conductive phase ferric oxide refers to contain the croci of strong suction ripple material iron oxide content more than 98wt%.
Drying is under the condition of 80～120 ℃ of temperature in the described step (4), time of drying 10～30min.
Advantage of the present invention and positively effect are:
(1) adopt sulphur-phosphorus nitration mixture control pH value hydrolysis to remove impurity such as titanium in the recrystallization.Utilize phosphoric acid to the more effective removal impurity of complexing action of iron ion, the principle of utilizing the ferrous sulfate solubility with temperature to change greatly simultaneously purifies ferrous sulfate;
(2) POV is ferrous effectively removes in the green vitriol free water and crystal water through microwave heating to obtain anhydrous slufuric acid ferrous, avoids acid mist to form, and is conducive to the production direct motion;
(3) strengthened microwave heating process by adding strong conductive phase red iron oxide as the product inductor, calcination time shortens greatly;
(4) present method prepares ferric oxide red colorant and does not produce waste liquid, environment-friendly high-efficiency.
Description of drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with (accompanying drawing and) embodiment, the invention will be further described.
Embodiment one: as shown in Figure 1, the step that the present embodiment green vitriol prepares ferric oxide red colorant is:
(1) under 70 ℃ temperature condition, industrial green vitriol and distilled water are mixed according to solid-to-liquid ratio 0.2:1kg/L and stir 50min, obtain copperas solution after the filtration;
(2) adding granularity according to solid-to-liquid ratio 0.02:1kg/L in the copperas solution is 200～250 purpose chemical pure iron powders, pH value with sulphur-phosphorus nitration mixture regulator solution is 2.0, then solution is heated to 75 ℃ and filter purely ferrous sulfate filtrate, ferrous sulfate filtrate obtains the ferrous sulfate crystal through naturally cooling recrystallization after-filtration, and filtrate is returned the industrial green vitriol of dissolving; Sulphur-phosphorus nitration mixture obtains according to the mass ratio 1:1.5 mixed of sulfuric acid and phosphoric acid, and sulfuric acid and phosphoric acid are technical grade.
(3) according to strong conductive phase ferric oxide: the ferrous sulfate crystal mass compares 1:9, be added into strong conductive phase ferric oxide in the ferrous sulfate crystal that obtains in the step (2) and mix, place the microwave environment calcining and decomposing then, regulating microwave output power 6kW, is 1000m with temperature of charge control at 900 ℃, the air amount of blasting
3/ h, calcining obtains croci behind the 20min, flue gas through exhausting system feed sulphuric acid soln absorb after for the production of sulfuric acid.Strong conductive phase ferric oxide refers to contain the croci of strong suction ripple material iron oxide content more than 98wt%.
(4) croci that step (3) calcining is prepared obtains ferric oxide red colorant through washing and drying, and drying is under the condition of 80 ℃ of temperature, time of drying 30min.Characterize by analysis, the red iron oxide product reaches the requirement of GB GB1863-89 first grade.
Embodiment two: as shown in Figure 1, the step that the present embodiment green vitriol prepares ferric oxide red colorant is:
(1) under 90 ℃ temperature condition, industrial green vitriol and distilled water are mixed according to solid-to-liquid ratio 0.28:1kg/L and stir 40min, obtain copperas solution after the filtration;
(2) adding granularity according to solid-to-liquid ratio 0.025:1kg/L in the copperas solution is 220～250 purpose chemical pure iron powders, pH value with sulphur-phosphorus nitration mixture regulator solution is 2.5, then solution is heated to more than 70 ℃ and the ferrous sulfate filtrate of filtering purely, ferrous sulfate filtrate obtains the ferrous sulfate crystal through naturally cooling recrystallization after-filtration, and filtrate is returned the industrial green vitriol of dissolving; Sulphur-phosphorus nitration mixture obtains according to the mass ratio 1:1.5 mixed of sulfuric acid and phosphoric acid, and sulfuric acid and phosphoric acid are technical grade.
(3) according to strong conductive phase ferric oxide: the ferrous sulfate crystal mass compares 1:4, be added into strong conductive phase ferric oxide in the ferrous sulfate crystal that obtains in the step (2) and mix, place the microwave environment calcining and decomposing then, regulating microwave output power 15kW, is 500m with temperature of charge control at 800 ℃, the air amount of blasting
3/ h, calcining obtains croci behind the 40min, flue gas through exhausting system feed sulphuric acid soln absorb after for the production of sulfuric acid.Strong conductive phase ferric oxide refers to contain the croci of strong suction ripple material iron oxide content more than 98wt%.
(4) croci that step (3) calcining is prepared obtains ferric oxide red colorant through washing and drying, and drying is under the condition of 100 ℃ of temperature, time of drying 10min.Characterize by analysis, the red iron oxide product reaches the requirement of GB GB1863-89 first grade.
Embodiment three: as shown in Figure 1, the step that the present embodiment green vitriol prepares ferric oxide red colorant is:
(1) under 80 ℃ temperature condition, industrial green vitriol and distilled water are mixed according to solid-to-liquid ratio 0.3:1kg/L and stir 60min, obtain copperas solution after the filtration;
(2) adding granularity according to solid-to-liquid ratio 0.03:1kg/L in the copperas solution is 200～250 purpose chemical pure iron powders, pH value with sulphur-phosphorus nitration mixture regulator solution is 2.3, then solution is heated to 80 ℃ and filter purely ferrous sulfate filtrate, ferrous sulfate filtrate obtains the ferrous sulfate crystal through naturally cooling recrystallization after-filtration, and filtrate is returned the industrial green vitriol of dissolving; Sulphur-phosphorus nitration mixture obtains according to the mass ratio 1:1.5 mixed of sulfuric acid and phosphoric acid, and sulfuric acid and phosphoric acid are technical grade.
(3) according to strong conductive phase ferric oxide: the ferrous sulfate crystal mass compares 3:7, be added into strong conductive phase ferric oxide in the ferrous sulfate crystal that obtains in the step (2) and mix, place the microwave environment calcining and decomposing then, regulating microwave output power 10kW, is 1200m with temperature of charge control at 880 ℃, the air amount of blasting
3/ h, calcining obtains croci behind the 30min, flue gas through exhausting system feed sulphuric acid soln absorb after for the production of sulfuric acid.Strong conductive phase ferric oxide refers to contain the croci of strong suction ripple material iron oxide content more than 98wt%.
(4) croci that step (3) calcining is prepared obtains ferric oxide red colorant through washing and drying, and drying is under the condition of 120 ℃ of temperature, time of drying 15min.Characterize by analysis, the red iron oxide product reaches the requirement of GB GB1863-89 first grade.
Above (by reference to the accompanying drawings) the specific embodiment of the present invention has been done detailed description, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skills possess, can also under the prerequisite that does not break away from aim of the present invention, make various variations.
Claims (5)
1. a green vitriol prepares the method for ferric oxide red colorant, and it is as follows to it is characterized in that concrete steps comprise:
(1) under 70～90 ℃ temperature condition, industrial green vitriol and distilled water are mixed according to solid-to-liquid ratio 0.2～0.3:1kg/L and stir 40～60min, obtain copperas solution after the filtration;
(2) in copperas solution, add iron filings according to solid-to-liquid ratio 0.02～0.03:1kg/L, pH value with sulphur-phosphorus nitration mixture regulator solution is 2.0～2.5, then solution is heated to more than 70 ℃ and the ferrous sulfate filtrate of filtering purely, ferrous sulfate filtrate obtains the ferrous sulfate crystal through naturally cooling recrystallization after-filtration, and filtrate is returned the industrial green vitriol of dissolving;
(3) according to strong conductive phase ferric oxide: the ferrous sulfate crystal mass is than 1～3:9～7, be added into strong conductive phase ferric oxide in the ferrous sulfate crystal that obtains in the step (2) and mix, place the microwave environment calcining and decomposing then, regulating microwave output power 6～15kW, is 500～1200m with temperature of charge control at 800～900 ℃, the air amount of blasting
3/ h, calcining obtains croci behind 20～40min, flue gas through exhausting system feed sulphuric acid soln absorb after for the production of sulfuric acid;
(4) croci that step (3) calcining is prepared obtains ferric oxide red colorant through washing and drying.
2. green vitriol according to claim 1 prepares the method for ferric oxide red colorant, it is characterized in that: described iron filings are the chemical pure iron powder, and granularity is 200～250 orders.
3. green vitriol according to claim 1 prepares the method for ferric oxide red colorant, it is characterized in that: described sulphur-phosphorus nitration mixture obtains according to the mass ratio 1:1.5 mixed of sulfuric acid and phosphoric acid, and sulfuric acid and phosphoric acid are technical grade.
4. green vitriol according to claim 1 prepares the method for ferric oxide red colorant, it is characterized in that: described strong conductive phase ferric oxide refers to contain the croci of strong suction ripple material iron oxide content more than 98wt%.
5. green vitriol according to claim 1 prepares the method for ferric oxide red colorant, it is characterized in that: drying is under the condition of 80～120 ℃ of temperature in the described step (4), time of drying 10～30min.
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| CN201310117387.4A CN103193277B (en) | 2013-04-07 | 2013-04-07 | Method for preparing iron oxide red pigment through copperas |
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| CN201310117387.4A CN103193277B (en) | 2013-04-07 | 2013-04-07 | Method for preparing iron oxide red pigment through copperas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058463A (en) * | 2013-10-30 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of iron oxide used for hard magnetic material |
| CN105217694A (en) * | 2015-08-26 | 2016-01-06 | 昆明理工大学 | A kind of method preparing red iron oxide and ammonium chloride |
| CN105366736A (en) * | 2015-11-11 | 2016-03-02 | 何定 | Titanium white by-product copperas dehydration and drying method |
| CN106564959A (en) * | 2016-10-28 | 2017-04-19 | 昆明理工大学 | Iron oxide red seed crystal preparation tank and preparation method of iron oxide red seed crystals |
| CN106564960A (en) * | 2016-10-28 | 2017-04-19 | 昆明理工大学 | Synthesis tank for iron oxide red |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058463A (en) * | 2013-10-30 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of iron oxide used for hard magnetic material |
| CN104058463B (en) * | 2013-10-30 | 2016-02-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of preparation method of the ferric oxide for hard magnetic material |
| CN105217694A (en) * | 2015-08-26 | 2016-01-06 | 昆明理工大学 | A kind of method preparing red iron oxide and ammonium chloride |
| CN105366736A (en) * | 2015-11-11 | 2016-03-02 | 何定 | Titanium white by-product copperas dehydration and drying method |
| CN106564959A (en) * | 2016-10-28 | 2017-04-19 | 昆明理工大学 | Iron oxide red seed crystal preparation tank and preparation method of iron oxide red seed crystals |
| CN106564960A (en) * | 2016-10-28 | 2017-04-19 | 昆明理工大学 | Synthesis tank for iron oxide red |
| CN106564960B (en) * | 2016-10-28 | 2017-11-10 | 昆明理工大学 | A kind of iron oxide red synth sink |
| CN106564959B (en) * | 2016-10-28 | 2017-11-10 | 昆明理工大学 | A kind of iron oxide red seed crystal preparation vessel and preparation method thereof |
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