CN1187465A - Method for producing iron oxide red - Google Patents
Method for producing iron oxide red Download PDFInfo
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- CN1187465A CN1187465A CN97107305A CN97107305A CN1187465A CN 1187465 A CN1187465 A CN 1187465A CN 97107305 A CN97107305 A CN 97107305A CN 97107305 A CN97107305 A CN 97107305A CN 1187465 A CN1187465 A CN 1187465A
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- iron oxide
- red iron
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- roasting
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Abstract
A process for preparing iron oxide red uses dusting ash of blast furnace as raw material whose TFe content is higher than 65% and whose granularity is 100 meshes (99%) and includes such technological steps as crushing, calcine or magnetic separation, calcine and crushing. It features no environmental pollution, short process flow, simple apparatus and low cost.
Description
The invention belongs to the material of handling non-ore, produce non-ferrous metal and compound technical thereof, particularly relate to a kind of preparation method of red iron oxide.
In the prior art, the raw material of producing red iron oxide mainly contains iron sheet, contains molysite or acid washing rolled steel waste liquid etc.Its preparation method is: producing red iron oxide with the iron sheet acid pasting, is to adopt sulfuric acid impregnating metal iron sheet, makes copperas solution, makes its finished product again after recrystallization is purified with carbon ammonium precipitation.With containing molysite continuous production red iron oxide, be by-product ferrous sulfate during or other molysite that adopts titanium white production, after dissolving, flocculation removal of impurities, add the crystallization crystal seed, produce red iron oxide.Producing red iron oxide with the acid washing rolled steel waste liquid, is to adopt through filtration, removal of impurities, injection roasting method recovered acid, makes the red iron oxide product simultaneously.
Chinese patent application 93108118.1 discloses a kind of method of producing the synthetic iron oxide red from magnetite.This method be with magnetite through thin mushroom, selected to the fine ore that contains TFe＞69%, to the sulfuric acid that wherein adds not enough reacting weight, obtain the mixture of molysite, ferrous salt and impurity, obtain raw material after the drying again through the strong mixing reaction.Raw material mature calcined material at high temperature, the cooling back is pulverized and is obtained the red iron oxide product.
Deficiency in the method is in sum, produces in the red iron oxide process with its raw material, must handle it with acid.This is contaminate environment not only, and technical process is long, production cost is high.
Its purpose of the present invention is that providing a kind of is the preparation method of the red iron oxide of raw material with the blast furnace dedusting ash.This method does not only need to handle with acid the raw material of red iron oxide, and is free from environmental pollution; And its technical process is short, and equipment is simple and easy to control, and cost is low.
The objective of the invention is to adopt following technical proposals to realize:
The preparation method of red iron oxide is to be raw material to contain TFe 〉=65%, granularity for-100 mesh sieves account for 99% blast furnace dedusting ash, makes finished product after pulverizing → roasting.
Be in the preparation method of above-mentioned red iron oxide, to be≤3 μ m with raw material pulverizing to Fisher particle size in the crushing process further; Maturing temperature in roasting process is 450～700 ℃, and roasting time is 0.5～2.5 hour.
The preparation method of red iron oxide is to be raw material to contain TFe 〉=65%, granularity for-100 mesh sieves account for 99% blast furnace dedusting ash, after magnetic separation → roasting → pulverizing, makes finished product.
Be that in the preparation method of above-mentioned red iron oxide, the magneticstrength of magnetic separation process is 5000～15000 oersteds further; Maturing temperature is 450～700 ℃, and roasting time is 0.5～4 hour, and pulverizing back finished product Fisher particle size is≤3 μ m.
Further be that in the preparation method of enterprising red iron oxide, its raw material is through twice wet magnetic separation.
Further be in the preparation method of above-mentioned red iron oxide, in the magnetic raw material under the magnetic separation postprecipitation, to add 0.5～2%Na
2CO
3Soaked 2～4 hours.
Compared with prior art, the present invention has following obvious advantage:
1. adopt blast furnace dedusting ash as the raw material of producing red iron oxide, need not acid handle, free from environmental pollution;
2. technical process is short, and equipment is simple and easy to control, has reduced production cost and facility investment;
3. make blast furnace dedusting ash obtain comprehensive utilization;
4. constant product quality, wherein red iron oxide contains the detrimental impurity SO of magneticsubstance
4 2-, Cl
-Amount, the SO in the red iron oxide of producing than acid pasting
4 2-, Cl
-Content is few.
Embodiment one
The preparation method of red iron oxide is, selects that to contain TFe 〉=65%, granularity be raw material for-100 mesh sieves account for 99% blast furnace dedusting ash for use, behind pulverizing → roasting two-step, can make the red iron oxide that is used for coating or building materials.
Embodiment two
The preparation method of red iron oxide is, selecting for use 20kg to contain TFe 〉=65%, granularity is raw material for-100 mesh sieves account for 99% blast furnace dedusting ash, adds in the dry type ultrafine crusher to be crushed to Fisher particle size≤2 μ m; Send electrically heated revolution roasting in kilns again to, its maturing temperature is 450～700 ℃, and roasting time is 0.5～2.5 hour.Its Fisher particle size of red iron oxide product of being produced is≤3 μ m, and its main chemical (wt%) is shown in the following table.As used red iron oxide in coating or the building materials.
| Constituent element | Fe 2O 3 | ????SiO 2 | ??SO 4 2- | ????Cl - | ????Na+K | ????CaO | ????Mg0 |
| Content | ?≥90 | ??≤0.85 | ?＜0.1 | ??＜0.1 | ???＜0.04 | ???＜0.4 | ???＜0.4 |
Embodiment three
The red iron oxide preparation method is, selecting for use 20kg to contain TFe 〉=65%, granularity is raw material for-100 mesh sieves account for 99% blast furnace dedusting ash, adds in the dry type ultrafine crusher to be crushed to Fisher particle size＜2 μ m; Send electrically heated stainless steel revolution roasting in kilns again to, its maturing temperature is 550 ℃, roasting time 0.5 hour; Obtaining average Fisher particle size is the red iron oxide product of 1.5～2.5 μ m, and its Chemical Composition (wt%) is:
Product is suitable for doing the tinting material or the additive of coating or building materials.
| Constituent element | Fe 2O 3 | ?SiO 2 | ?SO 4 2- | Cl - | Na+K | ?CaO | ?MgO |
| Content | 94.1 | ??0.67 | ?0.09 | 0.06 | ?0.03 | ?0.25 | 0.27 |
Embodiment four
The method of producing red iron oxide is, is raw material with containing TFe 〉=65%, granularity for-100 sieves account for 99% blast furnace dedusting ash, after magnetic separation → roasting → pulverizing, can make finished product.Product can be used as the raw material of magneticsubstance.
Embodiment five
The method of producing red iron oxide is, containing TFe 〉=65%, granularity with 100kg is raw material for-100 sieves account for 99% blast furnace dedusting ash, in magneticstrength is to carry out magnetic separation under the condition of 5000～15000 oersteds; Be 450～700 ℃ of following roastings 0.5～2.5 hour at maturing temperature again; Powder after the roasting is crushed to Fisher particle size≤3 μ m, promptly obtains the red iron oxide product.This product not only can be used as the tinting material or the additive of coating or building materials, the raw material of making magneticsubstance preferably.
Embodiment six
The method of producing red iron oxide is, containing TFe68%, granularity with 100kg is raw material for-100 mesh sieves account for 99% blast furnace dedusting ash, in magneticstrength is to carry out wet magnetic separation twice on the magnetic separator of 10000 oersteds; Send into rotary drum dryer again and carry out roasting, its maturing temperature is 550～600 ℃, roasting time 0.5～1 hour; Be crushed to＜2 μ m sending into the dry type ultrafine crusher through the powder after the roasting, the red iron oxide product that obtains is applicable to tinting material or the additive of making coating or building materials, is more suitable for doing the raw material of magneticsubstance.Its main chemical (wt%) is:
| Constituent element | Fe 2O 3 | ?SiO 2 | ?SO 4 2- | ????Cl - | Na+K |
| Content | ≥99 | ≤0.4 | ?＜?0.1 | ??＜0.1 | ＜0.1 ?????????? |
Embodiment seven
The method of producing red iron oxide is, containing TFe68%, granularity with 100kg is raw material for-100 mesh sieves account for 99% blast furnace dedusting ash, in magneticstrength is to carry out wet magnetic separation twice on the magnetic separator of 12000 oersteds; In precipitation magnetic thing, add 0.5～2% Na
2CO
3And soaked 2～4 hours; Send into rotary drum dryer after the cleaning again and carry out roasting, its maturing temperature is 650 ℃, roasting time 0.5 hour; Be crushed to Fisher particle size 1.98 μ m sending into the dry type ultrafine crusher through the powder after the roasting, the red iron oxide product that obtains is not only applicable to do the tinting material or the additive of coating or building materials, is more suitable for doing the raw material of magneticsubstance.Its main chemical (wt%) is:
| Constituent element | Fe 2O 3 | ??SiO 2 | ??SO 4 2- | ????Cl - | ????Na+K |
| Content | ??99.2 | ??0.25 | ??0.09 | ????0.081 | ????0.10 |
Claims (6)
1. the preparation method of red iron oxide is characterized in that, is raw material to contain TFe 〉=65% granularity for-100 mesh sieves account for 99% blast furnace dedusting ash, makes finished product through pulverizing → roasting.
2. as the preparation method of the said red iron oxide of claim, it is characterized in that, in crushing process, is≤3 μ m with raw material pulverizing to Fisher particle size; In roasting process, maturing temperature is 450～700 ℃, and roasting time is 0.5～2.5 hour.
3. the preparation method of red iron oxide is characterized in that, with contain TFe 〉=65%, granularity be-100 mesh sieves to account for 99% blast furnace dedusting ash be raw material, after magnetic separation → roasting → pulverizing, make finished product.
4. as the preparation method of the said red iron oxide of claim 3, it is characterized in that the magneticstrength of magnetic separation process is 5000～15000 oersteds; Maturing temperature is 450～700 ℃, and roasting time is 0.5～2.5 hour; Finished product Fisher particle size after the pulverizing is≤3 μ m.
5. as the preparation method of claim 3,4 said red iron oxides, it is characterized in that its raw material is through twice wet magnetic separation.
6. as the preparation method of the said red iron oxide of claim 5, it is characterized in that, in the magnetic raw material under the magnetic separation postprecipitation, add 0.5～2% Na
2CO
3Soaked 2～4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107305A CN1187465A (en) | 1997-01-04 | 1997-01-04 | Method for producing iron oxide red |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107305A CN1187465A (en) | 1997-01-04 | 1997-01-04 | Method for producing iron oxide red |
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|---|---|
| CN1187465A true CN1187465A (en) | 1998-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107305A Pending CN1187465A (en) | 1997-01-04 | 1997-01-04 | Method for producing iron oxide red |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671742A (en) * | 2012-06-01 | 2012-09-19 | 湖南恒光化工有限公司 | Process for grinding ferrous sulfate monohydrate |
| CN113735198A (en) * | 2021-08-25 | 2021-12-03 | 金川集团股份有限公司 | Preparation method and device of micron-sized nickel protoxide |
| CN115196685A (en) * | 2022-06-29 | 2022-10-18 | 鞍钢股份有限公司 | Method for preparing iron oxide material powder for iron oxide by using converter dust |
-
1997
- 1997-01-04 CN CN97107305A patent/CN1187465A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671742A (en) * | 2012-06-01 | 2012-09-19 | 湖南恒光化工有限公司 | Process for grinding ferrous sulfate monohydrate |
| CN113735198A (en) * | 2021-08-25 | 2021-12-03 | 金川集团股份有限公司 | Preparation method and device of micron-sized nickel protoxide |
| CN113735198B (en) * | 2021-08-25 | 2023-09-05 | 金川集团股份有限公司 | Preparation method and device of micron-sized nickel oxide |
| CN115196685A (en) * | 2022-06-29 | 2022-10-18 | 鞍钢股份有限公司 | Method for preparing iron oxide material powder for iron oxide by using converter dust |
| CN115196685B (en) * | 2022-06-29 | 2023-07-14 | 鞍钢股份有限公司 | Method for preparing iron oxide powder for iron oxide body by using converter dust |
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