CN1036938A - Produce the processing method of ferroferric oxide black - Google Patents
Produce the processing method of ferroferric oxide black Download PDFInfo
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- CN1036938A CN1036938A CN 89102339 CN89102339A CN1036938A CN 1036938 A CN1036938 A CN 1036938A CN 89102339 CN89102339 CN 89102339 CN 89102339 A CN89102339 A CN 89102339A CN 1036938 A CN1036938 A CN 1036938A
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- iron mud
- acid
- ferroferric oxide
- oxide black
- processing method
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Abstract
The processing method of producing ferroferric oxide black relates to a kind of processing method of directly extracting ferroferric oxide black from steel-making converter iron mud, at least comprise operations such as dispersion, removal of impurities, precipitation, drying and pulverizing, promptly at first with the micronization of iron mud, carry out acid treatment with suitable concentrated acid then, then the iron mud mixed solution after peracid treatment is precipitated, abandoning supernatant is also adjusted the pH value, at last drying precipitate, pulverizing is promptly got the ferroferric oxide black finished product.Technology of the present invention is simple, pollution is little, and the ferroferric oxide black product of being produced can reach country-level product standard, and can be widely used in converter iron mud is raw material production ferroferric oxide black product.
Description
The present invention relates to a kind of processing method of from steel-making converter iron mud, directly extracting ferroferric oxide black.
Will produce a large amount of flue dust in the convertor steelmaking process, its major ingredient is non-ferrous metal oxide compounds such as ferric oxide, iron protoxide, Z 250, lime carbonate and manganese oxide.In order to eliminate the pollution of flue dust to environment, converter steelmaking factory often adopts the Venturi meter wet dedusting.After the Venturi meter wet dedusting, converter dust has become the iron mud that mainly contains Z 250, but surrounding environment is still had certain pollution.Contain a large amount of iron in this steel-making converter iron mud, and have good physical and chemical performance, if can then not only can turn waste into wealth as raw material production inorganic iron series pigments, and can eliminate of the pollution of iron mud effectively environment.It is the processing method of raw material production iron oxide black and black magnetic oxide with steel melting furnace flue dust that Chinese patent CN86103443B and CN86106586A disclose a kind of respectively, and from essence, these two processing methodes have all been utilized red iron oxide (Fe
2O
3) addition reaction produce ferroferric oxide black, it is different that only both obtain the technology of red iron oxide.The former adopts chemical process, promptly utilize the stability of red iron oxide to diluted acid, adopt the diluted acid of proper concn that steel melting furnace flue dust is carried out acidleach, non-ferrous metal oxide compound and a part of iron protoxide and diluted acid reaction generate soluble salt and enter liquid phase, obtain red iron oxide with water rinse to reject these soluble salts then.A kind of processing method in back is a physical method, promptly utilize Z 250 magnetic, adopt magnetic separation and obtain martial ethiops.Because these two kinds of processing methodes have all adopted this processing step of addition reaction, so also there is secondary pollution in whole production technology more complicated still to environment, magnetic method also needs the magnetic separator of complexity.A kind of technology mainly is applicable to the open hearth flue dust that trioxygen-containingization two iron are more in addition, and the more converter iron mud of Z 250 is then inapplicable for containing.
The objective of the invention is to obtain a kind of processing method of from steel-making converter iron mud, directly extracting ferroferric oxide black.
To achieve these goals, the present invention utilizes the stability of Z 250 to finite concentration acid, adopt the acid of proper concn that steel-making converter iron mud is carried out acid treatment, non-ferrous metal oxide compound such as iron protoxide, ferric oxide, lime carbonate and manganese oxide and certain density acid-respons generate soluble salt and enter liquid phase, promptly get the Z 250 throw out through abundant post precipitation abandoning supernatant, drying and pulverizing promptly get the ferroferric oxide black finished product again.Below in conjunction with specific embodiment technical characterictic of the present invention is described in further detail.
Accompanying drawing 1 is produced the process flow sheet of ferroferric oxide black for the present invention.
With reference to the accompanying drawings 1, the process that the present invention produces ferroferric oxide black comprises at least dispersion, removal of impurities, precipitation, drying and pulverizes five processes, namely at first with homogenizer with the mud micronizing of steelmaking converter iron and make it to become uniform starchiness, process and the iron mud mixed liquor after peracid treatment is precipitated with acid then, abandoning supernatant is also adjusted pH value, at last drying precipitate, pulverizing is namely got the ferroferric oxide black finished product.
So-called dispersion step is to adopt homogenizer with the micronizing of steelmaking converter iron mud, makes its granularity be less than or equal to 320 orders; And add entry and make iron mud be uniform starchiness, the weight ratio of solid iron mud and water is 1: 3～20, optimum weight ratio is 1: 8～10.
So-called removal of impurities operation is to be 30～38% concentrated hydrochloric acid (HCL) with concentration, or is 40～45% concentrated nitric acid (HNO with concentration
3), or be that 30～38% concentrated hydrochloric acid, concentration are that 40～45% concentrated nitric acid and concentration are 40～45% hydrofluoric acid (HF) by the formulated mixing acid of 1: 0.1: 0.1 weight ratio to carrying out acid treatment through the iron mud after the dispersion step with concentration.Acid-treated temperature is 20～80 ℃, and optimum temps is 50～60 ℃; Keeping the pH value of iron mud mixed solution in the acid treatment process is 1～6, and best pH value is 3～4.
So-called precipitation operation is with the abundant post precipitation of iron mud mixed solution after peracid treatment, and abandoning supernatant is also used ammoniacal liquor (NH with clear water washing and precipitating thing again
3) pH value of adjusting mixed solution is 5～7.
Dry and pulverizing process is common operation.
Embodiment 1: get iron mud 100 grams, add water 100 grams, ground 30 minutes in homogenizer; Pour (rotating speed of stirrer is 50～200 rev/mins) in the container that has stirrer into and added mixing acid (is that 30～38% concentrated hydrochloric acid, concentration are that 40～45% concentrated nitric acid and concentration are that 40～45% hydrofluoric acid is formulated by 1: 0.1: 0.1 weight ratio with concentration) stirring reaction one hour, keeping pH value is 3～4, and temperature of reaction is 60 ± 5 ℃; Precipitate the sincere De of little roasting shovel yield sea such sorrow Hou 00 gram and stirring, redeposition discards 1/2 supernatant liquor after one hour, and adding ammoniacal liquor adjustment pH value is 6～7; Discharging fully precipitates and abandoning supernatant in another container, with the throw out oven dry, promptly gets the ferroferric oxide black finished product after crushed under 100～150 ℃ temperature, and its Z 250 content can reach 95.5%.
Embodiment 2: get iron mud 100 grams, add water 100 grams, grind after 30 minutes in homogenizer and pour (the stirrer rotating speed is 50～200 rev/mins) in the container that has stirrer into; Add concentration gradually and be concentrated hydrochloric acid 20～40mL of 30～31%, stirring reaction one hour, keeping pH value is 3～4, temperature of reaction is 60 5 ℃; Precipitate abandoning supernatant after a hour, add clear water 100 gram again, stirred 20 minutes, precipitate and discard 1/2 supernatant liquor after one hour, adding ammoniacal liquor adjustment pH value is 6～7; Discharging fully precipitates in another container, and abandoning supernatant is dried throw out under 100～150 ℃ temperature, promptly get the ferroferric oxide black finished product after crushed, and its Z 250 content can reach 95.5%.
Technology of the present invention is simple, pollution is little, and the ferroferric oxide black product of producing can reach country-level product (containing tri-iron tetroxide 95%) standard. Therefore, the present invention has good economic benefit and social benefit, can be widely used in the production ferroferric oxide black inorganic iron series pigments take steelmaking converter iron mud as raw material.
Claims (4)
1, a kind of processing method of from steel-making converter iron mud, directly extracting ferroferric oxide black, it is characterized in that it is at least by dispersion, removal of impurities, precipitation, dry and pulverizing five processes is formed, promptly at first with homogenizer with the micronization of steel-making converter iron mud, make it to become uniform starchiness, use concentrated hydrochloric acid then, or use concentrated nitric acid, or use concentrated hydrochloric acid, the mixing acid that concentrated nitric acid and hydrofluoric acid (HF) are mixed with by a certain percentage carries out acid treatment, then the iron mud mixed solution after peracid treatment is precipitated, get rid of supernatant liquor and adjust its pH value, at last with drying precipitate, pulverize, promptly get the ferroferric oxide black finished product.
2, the processing method of extraction ferroferric oxide black according to claim 1, it is characterized in that described dispersion step be adopt homogenizer with the micronization of steel-making converter iron mud, make its granularity be less than or equal to 320 orders, and add water and make iron mud be uniform starchiness, the weight ratio of solid iron mud and water is 1: 3～20, and optimum weight ratio is 1: 8～10.
3, the processing method of extraction ferroferric oxide black according to claim 1, it is characterized in that described removal of impurities operation is is 30～38% concentrated hydrochloric acid with concentration, or be 40～45% concentrated nitric acid, or be that 30～38% concentrated hydrochloric acid, concentration are that 40～45% concentrated nitric acid and concentration are that 40～45% hydrofluoric acid carries out acid treatment by the formulated mixing acid of 1: 0.1: 0.1 weight ratio to iron mud with concentration with concentration; The acid treatment temperature is 20～80 ℃, and optimum temps is 50～60 ℃; Keeping the pH value of iron mud mixed solution in the acid treatment process is 1～6, and best pH value is 3～4.
4, the processing method of extraction ferroferric oxide black according to claim 1 is characterized in that described precipitation operation is with the abundant post precipitation of iron mud mixed solution after peracid treatment, gets rid of supernatant liquor, washes throw out and uses ammoniacal liquor (NH with clear water again
3) pH value of adjusting mixed solution is 5～7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102339 CN1011962B (en) | 1989-04-13 | 1989-04-13 | Technique for producing ferroferric oxide black |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102339 CN1011962B (en) | 1989-04-13 | 1989-04-13 | Technique for producing ferroferric oxide black |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1036938A true CN1036938A (en) | 1989-11-08 |
| CN1011962B CN1011962B (en) | 1991-03-13 |
Family
ID=4854653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102339 Expired CN1011962B (en) | 1989-04-13 | 1989-04-13 | Technique for producing ferroferric oxide black |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1011962B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037675C (en) * | 1993-10-28 | 1998-03-11 | 武汉钢铁(集团)公司 | Method for producing ferric oxide black by using steel rolling greasy filth |
| CN1616553B (en) * | 2004-09-15 | 2010-07-14 | 胡修权 | Method for preparing iron oxide black and iron oxide red dye using steel-making convertor sludge |
-
1989
- 1989-04-13 CN CN 89102339 patent/CN1011962B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037675C (en) * | 1993-10-28 | 1998-03-11 | 武汉钢铁(集团)公司 | Method for producing ferric oxide black by using steel rolling greasy filth |
| CN1616553B (en) * | 2004-09-15 | 2010-07-14 | 胡修权 | Method for preparing iron oxide black and iron oxide red dye using steel-making convertor sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1011962B (en) | 1991-03-13 |
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