CN1042134A - Produce the technology of ferrite with utilizing smoke dust of oxygen blast open-hearth furnace with brown iron oxide - Google Patents
Produce the technology of ferrite with utilizing smoke dust of oxygen blast open-hearth furnace with brown iron oxide Download PDFInfo
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- CN1042134A CN1042134A CN 88105795 CN88105795A CN1042134A CN 1042134 A CN1042134 A CN 1042134A CN 88105795 CN88105795 CN 88105795 CN 88105795 A CN88105795 A CN 88105795A CN 1042134 A CN1042134 A CN 1042134A
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- smoke dust
- filter residue
- iron oxide
- ferrite
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Abstract
The present invention be a kind of be that raw material is produced ferrite with the technology of brown iron oxide with the utilizing smoke dust of oxygen blast open-hearth furnace, its technological process is as follows: with smoke dust hydrochloric acid+dilute sulphuric acid waste liquid hot dipping, use industrial NaOH solution washing filter residue after the hot dipping again, the washing after-filtration, oven dry, calcining, pulverize, the screening and the packing of product, this technological process is simple, with low cost, can provide ferric oxide greater than 97% brown iron oxide, be suitable for doing the raw materials for production use of ferrite magnetic material and device, promote the use of present method and can be steelworks improvement smoke contamination, increase economic efficiency and find an effective way.
Description
The present invention relates to a kind of is that raw material is produced the technology of ferrite with brown iron oxide with the utilizing smoke dust of oxygen blast open-hearth furnace.
Utilizing smoke dust of oxygen blast open-hearth furnace is formed by vapour deposition, and its main thing is ferric oxide mutually, and other Si, Mn, Mg, Ca etc. are respectively 2FeOSiO, MnO, CaO composite oxides and simple oxide, the about 20 μ m of dust median size, the complete about 2.28m of specific surface area
2/ g, loose specific weight is about 2.023g/m
3Up to now, this smoke dust is mainly collected by Steel Plant self, returns sintering plant briquetting, sinters piece into for the blast furnace ironmaking utilization.This one utilizes method simple, need not increase bulky equipment, and treatment capacity is unrestricted.But because of the smoke dust particle is fine, a part becomes dust again in sintering process, and utilization ratio is low, the repeated contamination environment, and increase steel works sintering dust collecting system load, become comparatively stubborn problem of iron and steel enterprise's environment protection and improvement person.
The objective of the invention is to make full use of utilizing smoke dust of oxygen blast open-hearth furnace potential advantage, as characteristics such as iron oxide content height, fine particles, specific surface area be bigger, adopt a series of chemical treatment technologies, improve ferric oxide content in the smoke dust, reduce oxide contents such as silicon, magnesium, calcium, aluminium, phosphorus, produce highly purified ferrite brown iron oxide, thereby improve economic results in society, controling environment to pollute brings benefit to the people.
Technological process of the present invention is described in detail in detail below:
Technology 1, list-salt acid leaching process (Si content＜0.4% in the smoke dust).
Smoke dust is placed reactor, add the technical hydrochloric acid of 0.5～5 mol or the hydrochloric acid soln and the dilute sulphuric acid waste liquid of each above-mentioned concentration of 50%, in order to leach the impurity in the smoke dust, sulfur acid 6～8 grams per liters in the dilute sulphuric acid waste liquid, the ratio of leach liquor and smoke dust is 1: 1, be that the 1kg smoke dust adds 1 liter of acid solution, heating and constantly stirring then, 40～120 ℃ of insulations down, after 1～5 hour, separate leach liquor, the washing filter residue, filter residue is dried, and 600～900 ℃ of following calcination 1 hour, the pH value of washings was controlled at 6～8, ball mill pulverizing, obtain high purity reddish-brown croci, use the X-ray diffraction analysis, prove that ferric oxide mainly by α-ferric oxide phase composite, can be used as the raw materials for production of ferrite magnetic material.
Technology 2, soda acid secondary lixiviation process (Si content 〉=0.5% in the smoke dust).
Smoke dust is placed reactor, acidleach, wash conditions are with technology 1, filter residue is after washing, and the NaOH solution secondary with 0.2～5 mol leaches again, and the alkaline solution add-on is 1 liter of NaOH solution of 1kg filter residue, above-mentioned solution is heated to 40～150 ℃, be incubated 1～5 hour, the filtering separation leach liquor is dried filter residue then, took exercise 1 hour down at 600～900 ℃, ball mill pulverizing obtains the higher degree brown iron oxide.
The principle that technology of the present invention is removed impurity is as follows:
1. remove pasc reaction;
Si in flue dust mainly with 2FeOSiO
2Or 2CaOSiO
2Form exist, following reaction takes place in acid, alkali lye:
Reaction (1) product silicic acid is water insoluble, also can condense when being heated to a certain temperature, but in diluted acid, cotton-shaped or precipitation is difficult to separate out, and also can separate with washing.Reaction (2) (3) product water glass water soluble and removing.When producing flocculation H
2SiO
3Also can remove by reaction (4).
2. the reaction of manganese
Manganese oxide is a kind of detrimental impurity in permanent-magnet ferrite, but in the Mn-Zn ferrite soft magnetic materials, but is one of chief component, therefore removing it is not complete purpose, see demand and purposes and decide, but in this invented technology, following reaction takes place and is removed in manganese oxide.
Manganous sulfate and Manganous chloride tetrahydrate are all water-soluble.
3. the reaction of magnesium, calcium
It is deliquescence that magnesium oxide is met water at normal temperatures:
Magnesium hydroxide is water insoluble, but is dissolved in acid:
Magnesium chloride and sal epsom are all water-soluble and remove.
Calcium oxide also has hydrolysis reaction to take place, and generates calcium hydroxide, is slightly soluble in hot water, but is dissolved in hydrochloric acid.
When leaching flue dust with hydrochloric acid, magnesium, calcium oxide major part all are removed.
4. the removal of other impurity
Aluminum oxide is dissolved in acid, and following reaction takes place:
The oxide compound of phosphorus generates soluble phosphate in basic solution:
5. the reaction of iron
Ferric oxide is insoluble to alkali, but is dissolved in acid, and following reaction takes place:
In sum, when once leaching with hydrochloric acid or leaching smoke dust with acid, alkali secondary, though ferric oxide can dissolve a part, the also most of dissolving of element oxides such as Si, Mn, Ca, Mg, Al, P, thus the ferric oxide purity of flue dust is improved.
Leach the utilization of waste liquid
When leaching flue dust, remove in the leach liquor and be dissolved with Mn with hydrochloric acid
2+, Mg
2+, Ca
2+, Al
3+Outside the plasma, also contain H
2SiO
3And Fe
3+, particularly add spent pickle liquor itself and just contain 30 grams per liter Fe
2+So, contain more Fe in the leach liquor
2+, contain certain free acid radical ion in addition.In alkaline leach liquor, remove and contain Na
2SiO
3Outward, also surplus have certain free alkali.These leaching waste liquids all should be reclaimed or be handled from material recovery and wastewater discharge standard, and these waste liquids can be used for: (1) produces the pigment iron oxide red, and it is refining to leach waste water earlier, produces the pigment iron oxide red with refined wastewater again.(2) be used for wastewater treatment, producing at the ferrite ferric oxide has alkalescence and slightly acidic waste liquid to discharge in the process, and these waste liquids neutralize in wastewater disposal basin, clarify, discharge, and do not need to increase the wastewater treatment expense again.Can be used further to leach the processing flue dust after (3) one times spent picking solution is separated.
Embodiment:
1. take by weighing smoke dust 20kg, place in the plastic tank, 20 liters of the technical hydrochloric acids of adding 0.5～5 mol are heated to 40～120 ℃, constantly stir, separate leach liquor after 1～5 hour, the washing filter residue is dried filter residue, took exercise 1 hour down at 750 ℃, ball mill pulverizing is weighed and is analyzed composition, 1# sample in the results are shown in Table.
2. take by weighing smoke dust 100kg, add each 50 liters of 0.5～5 mole technical hydrochloric acid and dilute sulphuric acid waste liquids, adopt above-mentioned the same terms to leach after, washing and filtering, filter residue carries out the secondary leaching for 100 liters with the NaOH solution of 0.2～5 mol again, and heating is incubated 1～5 hour down at 40～150 ℃, filter, separate leach liquor then, with the filter residue oven dry, tempered ball mill pulverizing 1 hour down at 750 ℃, weigh and analyze composition, it the results are shown in Table middle 2# sample.
This technological process is simple, and is with low cost. Add the dilute sulfuric acid waste liquid by this method with hydrochloric acid or hydrochloric acid and leach impurity in the smoke dust, perhaps further leach SiO with soda bath2Impurity can improve the purity 2.5～4.0% of smoke dust iron oxide, removes Si35～65%, removes Mn40～60%, and the brown iron oxide of producing contains Fe2O
3＞97%, the raw materials for production that are suitable for doing ferrite magnetic material and device use, and promote the use of this method and can be steel mill and curb environmental pollution, and increase economic efficiency and find an effective way.
Smoke dust leaches as a result table
| Chemical composition % | Increase iron rate % | Except Si leads % | The rate of recovery % of iron | ||||||
| FeO | Si | Mn | Ca | Mg | Rl | ||||
| Smoke dust | 94.13 | 0.519 | 1.53 | 0.174 | 0.301 | 0.1 | |||
| The 1# sample | 97.35 | 0.28 | 0.541 | 0.07 | 0.168 | 0.02 | 3.4 | 64.8 | 97.7 |
| The 2# sample | 97.01 | 0.24 | 0.618 | 0.25 | 0.30 | 0.03 | 3.1 | 53.8 | 97.2 |
Claims (2)
1, a kind of is that raw material is produced the technology of ferrite with brown iron oxide with the utilizing smoke dust of oxygen blast open-hearth furnace, when Si content in the smoke dust＜0.4%, it is characterized in that leaching smoke dust with the technical hydrochloric acid of 0.5～5 mol or the hydrochloric acid soln and the dilute sulphuric acid waste liquid of each above-mentioned concentration of 50%, the add-on of leach liquor adds 1 liter of acid solution for the 1kg smoke dust, with this solution heating and constantly stirring, 40～120 ℃ of insulations down, after 1～5 hour, separate leach liquor, the washing filter residue, filter residue is dried, in 600～900 ℃ of following calcination 1 hour, ball mill pulverizing.
2, a kind of is that raw material is produced the technology of ferrite with brown iron oxide with the utilizing smoke dust of oxygen blast open-hearth furnace, when Si content in the smoke dust 〉=0.5%, it is characterized in that leaching smoke dust with the technical hydrochloric acid of 0.5～5 mol or the hydrochloric acid soln and the dilute sulphuric acid waste liquid of each above-mentioned concentration of 50%, the add-on of leach liquor adds 1 liter of acid solution for the 1kg smoke dust, with this solution heating and constantly stirring, 40～120 ℃ of insulations down, after 1～5 hour, separate leach liquor, the washing filter residue, again filter residue is placed the NaOH solution of 0.2～5 mol, the alkaline solution consumption is heated to 40～150 ℃ for the 1kg filter residue adds 1 liter of NaOH solution with above-mentioned solution, is incubated 1～5 hour, filtering separation leach liquor then, with the filter residue oven dry, tempered ball mill pulverizing 1 hour down at 600～900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105795 CN1017420B (en) | 1988-10-22 | 1988-10-22 | Process for the preparation of ferric oxide powder used for ferrite by utilizing smoke dust of oxygen blast open-hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105795 CN1017420B (en) | 1988-10-22 | 1988-10-22 | Process for the preparation of ferric oxide powder used for ferrite by utilizing smoke dust of oxygen blast open-hearth furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1042134A true CN1042134A (en) | 1990-05-16 |
| CN1017420B CN1017420B (en) | 1992-07-15 |
Family
ID=4833937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88105795 Expired CN1017420B (en) | 1988-10-22 | 1988-10-22 | Process for the preparation of ferric oxide powder used for ferrite by utilizing smoke dust of oxygen blast open-hearth furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1017420B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393420C (en) * | 2005-11-23 | 2008-06-11 | 天津大学 | Method of separating iron and carbon from dust setting ash |
| CN107099672A (en) * | 2017-05-16 | 2017-08-29 | 中国恩菲工程技术有限公司 | The recovery method of the fume from steel making containing zinc |
| CN110407256A (en) * | 2019-08-07 | 2019-11-05 | 江苏宇星工贸有限公司 | The production technology of nanometer ferro oxide |
| CN112794723A (en) * | 2021-01-12 | 2021-05-14 | 乳源东阳光磁性材料有限公司 | Return firing method of manganese-zinc power ferrite magnetic core |
| CN114655994A (en) * | 2020-12-23 | 2022-06-24 | 中国科学院江西稀土研究院 | Purification method of ferrite primary product |
-
1988
- 1988-10-22 CN CN 88105795 patent/CN1017420B/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393420C (en) * | 2005-11-23 | 2008-06-11 | 天津大学 | Method of separating iron and carbon from dust setting ash |
| CN107099672A (en) * | 2017-05-16 | 2017-08-29 | 中国恩菲工程技术有限公司 | The recovery method of the fume from steel making containing zinc |
| CN107099672B (en) * | 2017-05-16 | 2019-02-26 | 中国恩菲工程技术有限公司 | The recovery method of the fume from steel making containing zinc |
| CN110407256A (en) * | 2019-08-07 | 2019-11-05 | 江苏宇星工贸有限公司 | The production technology of nanometer ferro oxide |
| CN110407256B (en) * | 2019-08-07 | 2021-11-02 | 江苏宇星科技有限公司 | Production process of nanoscale iron oxide |
| CN114655994A (en) * | 2020-12-23 | 2022-06-24 | 中国科学院江西稀土研究院 | Purification method of ferrite primary product |
| CN112794723A (en) * | 2021-01-12 | 2021-05-14 | 乳源东阳光磁性材料有限公司 | Return firing method of manganese-zinc power ferrite magnetic core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1017420B (en) | 1992-07-15 |
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