CN102464356A - Application and recycling method of normalized silicon steel shot blasting scale - Google Patents
Application and recycling method of normalized silicon steel shot blasting scale Download PDFInfo
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- CN102464356A CN102464356A CN2010105519219A CN201010551921A CN102464356A CN 102464356 A CN102464356 A CN 102464356A CN 2010105519219 A CN2010105519219 A CN 2010105519219A CN 201010551921 A CN201010551921 A CN 201010551921A CN 102464356 A CN102464356 A CN 102464356A
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- silicon steel
- steel shot
- peening
- normalizing
- iron scale
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Abstract
The invention discloses an application of the normalized silicon steel shot blasting scale, which is used for preparing ferric oxide powder so as to change the abandoned normalized silicon steel shot blasting scale into ferric oxide powder which can be used for industrial production. Correspondingly, the invention also discloses a recycling method for the normalized silicon steel shot blasting scale, which comprises the following steps: washing the normalized silicon steel shot blasting scale with water; then, adding hydrochloric acid into the normalized silicon steel shot blasting scale to dissolve the scale in the hydrochloric acid; adding ammonia water to generate sol-like iron hydroxide in the solution; adsorbing impurities in mixed solution with the sol-like iron hydroxide to generate precipitate so as to obtain ferric chloride solution clear solution; and then, preparing the ferric chloride solution into ferric oxide powder.
Description
Technical field
The present invention relates to a kind of purposes of waste and utilize method accordingly again, relate in particular to a kind of purposes of iron scale waste and utilize method again.
Background technology
The thickness of normalizing silicon steel surface scale in the normalizing process can increase; Because the silicone content in this type steel grade is high; Therefore there is the oxide debris that one deck silicone content is high, thickness is big in the surface of this type steel, and this layer oxide debris is unfavorable for that follow-up hydrochloric acid turbulent flow pickling unit carries out corresponding production process.In order to improve the speed of pickling, save the pickling time, normalizing silicon steel adopts shot peening usually before carrying out pickling, to remove the most of oxide debris of belt steel surface.
These are by the oxide debris that produces in the shot-peening process, and the shot-peening steel ball that uses in the shot-peening process is many handles as solid waste, have caused environmental pollution, have wasted effective constituent wherein on the other hand.Existing another kind of treatment process is above-mentioned iron scale directly to be put into steel melting furnace melt down, and the economic benefit of this treatment process is extremely low.
Summary of the invention
The purposes that the purpose of this invention is to provide a kind of normalizing silicon steel shot-peening iron scale; And correspondingly utilize method again; Thereby the shot-peening iron scale that contains a large amount of impurity that produces in the silicon steel normalizing process is recycled; To reduce the discharging of solid waste, meanwhile create high economic benefit.
The present invention provides a kind of purposes of normalizing silicon steel shot-peening iron scale according to the foregoing invention purpose, uses it for preparation red oxide of iron powder, and iron content is 99.30%～99.50wt% in the red oxide of iron powder that makes.
Correspondingly, what the present invention also provided normalizing silicon steel shot-peening iron scale utilizes method again, and it comprises the steps:
(1) normalizing silicon steel shot-peening iron scale is washed, removed wherein hydrophilic impurities such as calcium;
(2) in through the normalizing silicon steel shot-peening iron scale of washing, adding concentration is that 8～15wt%, temperature are 50～80 ℃ hydrochloric acid; Obtain the mixing solutions after normalizing silicon steel shot-peening iron scale dissolves; The pH value of said mixing solutions is 2～4; The staple of mixing solutions is a ferric chloride Solution(38, also contains the hydrochloric acid of part for the participation solubilizing reaction in addition in this solution, and the impurity in the normalizing silicon steel shot-peening iron scale;
8HCl+Fe
3O
4＝2FeCl
3+FeCl
2+4H
2O
(3) with after the above-mentioned mixing solutions cooling, to wherein adding ammoniacal liquor, in mixing solutions, generate to be and dissolve gelationus ironic hydroxide, the amount of adding ammoniacal liquor is for adding 1.5～2.5wt% of hydrochloric acid content;
FeCl
3+3NH
3·H
2O＝Fe(OH)
3↓+3NH
4Cl
(4) be the impurity that dissolves in the gelationus ironic hydroxide absorption mixing solutions, generate deposition, obtain ferric chloride Solution(38; Be impurity such as dissolving the silicon-dioxide of gelationus ironic hydroxide in can adsorbent solution, aluminium, manganese, nickel, and be that core forms critical nuclei with it, the critical nuclei precipitation is separated out, and the impurity in the solution can take place after growing up to precipitate and remove.
(5) above-mentioned ferric chloride Solution(38 is processed the red oxide of iron powder.
4FeCl
2+4H
2O+O
2＝2Fe
2O
3+8HCl↑
Preferably, in the said step (2), be dissolved in the process of hydrochloric acid, mixing solutions continued to stir, thereby accelerate dissolution process and make solubilizing reaction fully carry out at normalizing silicon steel shot-peening iron scale.
Preferably, in the said step (3) mixing solutions is cooled to 30～50 ℃, again to wherein adding ammoniacal liquor.
Preferably, in the said step (4), in generating sedimentary process, add flocculation agent,, accelerate sedimentary generation through the static neutralizing effect of flocculation agent.
Preferably, the addition of said flocculation agent accounts for 0.8～2.5wt% of mixing solutions.
Preferably, adopt spray roasting that ferric chloride Solution(38 is processed red oxide of iron in the said step (5).
Preferably, the method for utilizing again of said normalizing silicon steel shot-peening iron scale also comprises step (6): it is mud cake that the throw out that generates is adopted the pressure filter press filtration.
Preferably, the hydrochloric acid in the said step (2) was obtained by sour the mixing with technical hydrochloric acid of abraum salt that the chlorohydric acid pickling unit produces.
The present invention makes it can efficiently remove other impurity compositions except that red stone in the shot-peening iron scale through adopting technique scheme, and the red stone purification is prepared as can be used for industrial high-quality red oxide of iron.Through technical scheme of the present invention, the ferro element in the shot-peening iron scale obtains reuse basically, and organic efficiency surpasses 95%; And the red oxide of iron based on very high purity of producing thus; Iron level can reach about 99.40%, and detrimental impurity content such as silicon, calcium, magnesium, nickel all are lower than 100ppm, reaches the judgement requirement of first grade in the ferrite raw material national standard (GB/T24244-2009); Realized the zero release of shot-peening iron scale simultaneously, the environmental pollution of having avoided it to cause.
Embodiment
Embodiment 1-9
Adopt normalizing silicon steel shot-peening iron scale to prepare the red oxide of iron powder according to the following step:
(1) normalizing silicon steel shot-peening iron scale is washed, removed wherein hydrophilic impurities such as calcium;
(2) in through the normalizing silicon steel shot-peening iron scale of washing, adding concentration is that 8～15wt%, temperature are 50～80 ℃ hydrochloric acid; This hydrochloric acid was obtained by sour the mixing with technical hydrochloric acid of abraum salt that the chlorohydric acid pickling unit produces; Fully stir; Obtain containing the iron(ic)chloride mixing solutions of impurity, the pH value of control mixing solutions is 2～4;
(3) import in the settling bath after above-mentioned mixing solutions is cooled to 30～50 ℃, in the process that imports settling bath, in mixing solutions, add ammoniacal liquor, the amount of adding ammoniacal liquor is dissolved gelationus ironic hydroxide for adding 1.5～2.5wt% of hydrochloric acid content, generate to be;
(4) in solution, add positively charged ion model flocculation agent N8173, the addition of flocculation agent accounts for 0.8～2.5wt% of mixing solutions, is the impurity that dissolves in the gelationus ironic hydroxide adsorbent solution, generates deposition, obtains the ferric chloride Solution(38 clear liquid;
(5) adopt spray roasting to process the red oxide of iron powder ferric chloride Solution(38 clear liquid.
(6) throw out that generates being adopted the pressure filter press filtration is mud cake.
Each processing parameter among the embodiment 1-9 is referring to table 1.
Table 1
Annotate: the density of hydrochloric acid is 1.15kg/L in the table 3, and the density of ammoniacal liquor is 0.88kg/L, and the density of flocculation agent N8173 is 1.05kg/L.
The content of ferro element is seen table 2 in the red oxide of iron powder that makes among the embodiment 1-9.
Table 2
Can find out from above-mentioned table 2; Adopt technical scheme of the present invention that the depleted iron scale is handled, can obtain the very high red oxide of iron powder of purity, can satisfy the needs of industrial red oxide of iron powder fully; Realize refuse reclamation, had remarkable economic efficiency.
Be noted that above enumerate be merely specific embodiment of the present invention, obviously the invention is not restricted to above embodiment, many similar variations are arranged thereupon.If those skilled in the art all should belong to protection scope of the present invention from all distortion that content disclosed by the invention directly derives or associates.
Claims (9)
1. the purposes of a normalizing silicon steel shot-peening iron scale is characterized in that, said normalizing silicon steel shot-peening iron scale is used to prepare the red oxide of iron powder, and iron content is 99.30%～99.50wt% in the red oxide of iron powder that makes.
A normalizing silicon steel shot-peening iron scale utilize method again, it is characterized in that, comprise the steps:
(1) normalizing silicon steel shot-peening iron scale is washed, removed hydrophilic impurities wherein;
(2) in through the normalizing silicon steel shot-peening iron scale of washing, adding concentration is that 8～15wt%, temperature are 50～80 ℃ hydrochloric acid, obtains the mixing solutions after normalizing silicon steel shot-peening iron scale dissolves, and the pH value of said mixing solutions is 2～4;
(3) with after the above-mentioned mixing solutions cooling, to wherein adding ammoniacal liquor, in mixing solutions, generate to be and dissolve gelationus ironic hydroxide, the amount of adding ammoniacal liquor is for adding 1.5～2.5wt% of hydrochloric acid content;
(4) be the impurity that dissolves in the gelationus ironic hydroxide absorption mixing solutions, generate deposition, obtain ferric chloride Solution(38;
(5) above-mentioned ferric chloride Solution(38 is processed the red oxide of iron powder.
3. normalizing silicon steel shot-peening iron scale as claimed in claim 2 utilize method again, it is characterized in that, in the said step (2), be dissolved in the process of hydrochloric acid at normalizing silicon steel shot-peening iron scale, mixing solutions is continued to stir.
4. normalizing silicon steel shot-peening iron scale as claimed in claim 3 utilize method again, it is characterized in that, in the said step (3) mixing solutions is cooled to 30～50 ℃, again to wherein adding ammoniacal liquor.
5. normalizing silicon steel shot-peening iron scale as claimed in claim 4 utilize method again, it is characterized in that, in the said step (4), in generating sedimentary process, add flocculation agent.
6. normalizing silicon steel shot-peening iron scale as claimed in claim 5 utilize method again, it is characterized in that the addition of said flocculation agent accounts for 0.8～2.5wt% of mixing solutions.
7. normalizing silicon steel shot-peening iron scale as claimed in claim 1 utilize method again, it is characterized in that, adopt spray roasting that ferric chloride Solution(38 is processed red oxide of iron in the said step (5).
8. normalizing silicon steel shot-peening iron scale as claimed in claim 1 utilize method again, it is characterized in that also comprise step (6): it is mud cake that the throw out that generates is adopted the pressure filter press filtration.
9. normalizing silicon steel shot-peening iron scale as claimed in claim 1 utilize method again, it is characterized in that the abraum salt acid that the hydrochloric acid in the step (2) is produced by the chlorohydric acid pickling unit mixes with technical hydrochloric acid and obtains.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818966A (en) * | 2012-11-19 | 2014-05-28 | 宝山钢铁股份有限公司 | Large-specific surface area superfine powdery iron oxide red spray roasting method |
| WO2017186162A1 (en) * | 2016-04-29 | 2017-11-02 | 青拓集团有限公司 | Process for treating metal surface waste |
| CN110304661A (en) * | 2019-06-20 | 2019-10-08 | 李柏丛 | Soft magnetic ferrite high-performance iron oxide new preparation process |
| CN110342584A (en) * | 2019-07-18 | 2019-10-18 | 李柏丛 | The new process of soft magnetic materials is used for using steel mill's steel rolling byproduct iron scale preparation high-performance iron oxide |
| CN110937622A (en) * | 2019-11-12 | 2020-03-31 | 中铝山东有限公司 | Method for preparing 4N gallium oxide from sponge gallium |
| CN114835170A (en) * | 2022-06-06 | 2022-08-02 | 湖南华菱涟钢特种新材料有限公司 | Production process of iron oxide powder with low calcium content |
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| CN1521219A (en) * | 2002-10-19 | 2004-08-18 | 石家智 | Production of nm- pigments and nm- magnetic materials using ferric oxide |
| CN1843965A (en) * | 2006-04-28 | 2006-10-11 | 中冶南方工程技术有限公司 | Purification treatment process of waste liquor of hydrochloric acid |
| US20100247407A1 (en) * | 2006-10-20 | 2010-09-30 | Rhodia Operations | Highly acidic compositions comprising zirconium and silicon oxides and an oxide of at least one other element selected from among titanium, aluminum, tungsten, molybdenum, cerium, iron, tin, zinc, and manganese |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818966A (en) * | 2012-11-19 | 2014-05-28 | 宝山钢铁股份有限公司 | Large-specific surface area superfine powdery iron oxide red spray roasting method |
| CN103818966B (en) * | 2012-11-19 | 2015-07-22 | 宝山钢铁股份有限公司 | Large-specific surface area superfine powdery iron oxide red spray roasting method |
| WO2017186162A1 (en) * | 2016-04-29 | 2017-11-02 | 青拓集团有限公司 | Process for treating metal surface waste |
| CN110304661A (en) * | 2019-06-20 | 2019-10-08 | 李柏丛 | Soft magnetic ferrite high-performance iron oxide new preparation process |
| CN110342584A (en) * | 2019-07-18 | 2019-10-18 | 李柏丛 | The new process of soft magnetic materials is used for using steel mill's steel rolling byproduct iron scale preparation high-performance iron oxide |
| CN110937622A (en) * | 2019-11-12 | 2020-03-31 | 中铝山东有限公司 | Method for preparing 4N gallium oxide from sponge gallium |
| CN114835170A (en) * | 2022-06-06 | 2022-08-02 | 湖南华菱涟钢特种新材料有限公司 | Production process of iron oxide powder with low calcium content |
| CN114835170B (en) * | 2022-06-06 | 2023-11-28 | 湖南华菱涟钢特种新材料有限公司 | Production process of low-calcium-content ferric oxide powder |
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