CN86106586A - With the chimney for steel making ash is the method for raw material production black magnetic oxide - Google Patents
With the chimney for steel making ash is the method for raw material production black magnetic oxide Download PDFInfo
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- CN86106586A CN86106586A CN86106586.7A CN86106586A CN86106586A CN 86106586 A CN86106586 A CN 86106586A CN 86106586 A CN86106586 A CN 86106586A CN 86106586 A CN86106586 A CN 86106586A
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- iron oxide
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Abstract
With the chimney for steel making ash is the method for raw material production black magnetic oxide, is the improvement to existing production method, and its purpose mainly is to eliminate the pollution of chimney for steel making ash to environment.Product performance are better than the performance of iron oxide black that sell in market.The present invention is a raw material with the chimney for steel making ash directly, and comprises seven technological processs such as washing, magnetic separation, addition reaction.Its another product is a MAGNETIC IRON OXIDE BROWN.
Technology of the present invention is simple, and cost is low, and Functionality, quality and appealing design does not have secondary pollution.The present invention can be used for the comprehensive utilization to the chimney for steel making ash.Product can be used for aspects such as rubber, plastics, artificial leather product, paint, coating, the highly purified magneticsubstance that can be used as.
Description
The invention belongs to inorganic iron series pigments, MAGNETIC IRON OXIDE BROWN, the method for black magnetic oxide of producing.Produce the method for iron oxide black in the prior art, generally with the scrap iron skin, iron filings are raw material, behind multiple working procedures such as overpickling, crystal seed, oxidation, make red iron oxide earlier, and then make iron oxide black at last through multiple working procedures such as addition reactions.If preparation MAGNETIC IRON OXIDE BROWN, black magnetic oxide also need finally just can make through high-temperature calcination again.
This traditional production method, complex manufacturing not only, flow process is very long, also needs to expend a large amount of industrial soda acids and a large amount of energy cost height, and environment is polluted.In 1983 India once someone proposed to use converter flyash, and was bluish grey through operations such as overpicklings, uses the laboratory method (seeing chemical abstracts 99:1415173) of ferrous sulfate chemosynthesis pigment-level red iron oxide again.Because this method is with converter flyash, bluish grey is raw material, is prepared into more rudimentary red iron oxide, preparation technology's more complicated.New chemical plant is built in 1985 Yang Wenlin slip-stick artist and Tianjin, Tianjin Steel Works be developed into Tianjin Steel Works's open hearth dust ash be raw material through washing, pickling, add the method for ferrous sulfate synthetic magmetite again.This method technology still complexity has pair environment to cause secondary pollution problem simultaneously.
The present invention is at the physics a large amount of to chimney for steel making ash, on the basis of chemical property research, proposed one most economical, reasonable, make things convenient for the free of contamination again novel method of environment.
With Tianjin Steel Works is example, main trioxygen-containingization two iron 59% of open hearth flue dust (being red imperial dust), and converter flue ash (being Huanglong's dust) mainly contains Z 250 56%.They all have as pigment and physicochemical property well.Also having the existing unexistent characteristic of the prepared inorganic iron series pigments of the mode of production of China simultaneously is magnetic.The present invention is exactly
Utilize its this characteristic, prepare high-purity mangesium oxide cologne earth, iron oxide black by magnetic separation.
The present invention has important effect to eliminating the steel-making dust environmental pollution.Be to turn waste into wealth.Carry out one of desirable approach of comprehensive utilization of resources.Prepared product has great economic worth.
With the Oxygen Furnace Steel open hearth, the converter flue ash is the raw material production iron oxide brown, the technical process of iron oxide black as shown in the figure, it comprises following seven technological processs.
One, washing:, put into the washing of washing bath internal heating with open hearth electrostatic precipitation flue dust or converter electrostatic precipitation mud.Under stirring state, give a baby a bath on the third day after its birth time with hot water, remove water-soluble calcium oxide etc.
Two, magnetic separation: the material after will washing is squeezed in the magnetic separation groove, revolves magnetic separation degaussing then under the floating condition mutually at solid-liquid, with purified iron oxide brown (ferric oxide), or purified iron oxide black (Z 250), put into another groove.This process can be returned multiple carrying out according to the purposes of product, the number of times of magnetic separation the more, the product that obtains is purer.
Three, filter: with the material after the magnetic separation according to different purposes 200 to 300 mesh sieves.
Four, dehydrate: use centrifuge dewatering, or alternate manner all can.It is dry that finished product after the dehydration is put into kiln, is finished product after the oven dry.Open hearth flue dust gets the product MAGNETIC IRON OXIDE BROWN, the grey black magnetic oxide that gets of converter flue.Above-mentioned two finished products are middle thick finished product.Also need pass through following several procedures in order to obtain the higher iron oxide black of purity.
Five, addition reaction:, do not need drying with the material after washing, magnetic separation, filtration, the dehydration.Add add again in the reactor an amount of water be warmed up to 100 ℃ with sodium hydroxide control PH between 7～8, divide three times then and add ferrous sulfate, about 3 hours of reaction times.The weight ratio of ferrous sulfate and flue dust be about 1: 1.2 for well.
Six, filter washing: according to different requirements, with the Luo Jinhang filtration of suitable order number to iron oxide black product.Water cleans the material after filtering again, removing sulfate ion wherein, and tests with BaCe.
Seven, dehydrate: will put into storage cylinder standing demix through the material after the washing, and discharge water wherein.After the material dewatering drying, will obtain purity than higher final finished black magnetic oxide.
Above-mentioned technology is greatly simplified than traditional technology, can save a large amount of industrial soda acid and the energy, can not cause secondary pollution to environment, the black magnetic oxide that is generated has high temperature resistant and advantage acid-alkali-corrosive-resisting, and can eliminate the pollution of flue dust to environment effectively.Above-mentioned technology is more more reasonable, convenient than the technology of development in 8 or five years such as Yang Wenlin, economy, product purity height, and cost is low, is to fully utilize one of desirable approach.
Accompanying drawing 2 explanations:
The steelmaking oxygen blowing open hearth i.e. " red dragon " flue dust space structure figure.Openhearth steelmaking flue dust is γ-type ferric oxide, and its space three-dimensional degree equates a=b=c=8.350A.
Claims (5)
1, a kind of method of producing iron oxide black is a raw material with the scrap iron skin generally, and through cleanup acid treatment, multiple working procedures such as crystal seed, oxidation generate red iron oxide, generate iron oxide black through addition reaction again.
The invention is characterized in that it is is raw material with the chimney for steel making ash, and comprise technological processs such as washing, magnetic separation, addition reaction, prepare the method for iron oxide black.
2, a kind of method according to the said production iron oxide black of claim 1, it is characterized in that said magnetic separation process is to extract needed ferric oxide under the situation of mixing of material and water, and Z 250, remove calcium oxide wherein, and other heavy metal oxide.
3, a kind of method according to the said production iron oxide black of claim 1 is characterized in that said addition reaction is with material and water after process washing, magnetic separation, the filtration, and carry out in the ferrous sulfate adding reactor.Temperature of reaction is 90～100 ℃.Ferrous sulfate divides several times to add, and with sodium hydroxide or yellow soda ash, the pH value in the reactor is controlled between 6.5～7.5.
4, a kind of method according to the said production iron oxide black of claim 3 is characterized in that the weight ratio of ferrous sulfate and dry material is 1: 1.2 in the said addition reaction.
5, a kind of method according to the said production black magnetic oxide of claim 1 is characterized in that the present invention has proved that contained ferric oxide has magnetic for the γ type in the chimney for steel making ash, and the Z 250 of prepared one-tenth also is magnetic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106586.7A CN1003508B (en) | 1986-10-05 | 1986-10-05 | Process of producing ferroferric-oxide black |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106586.7A CN1003508B (en) | 1986-10-05 | 1986-10-05 | Process of producing ferroferric-oxide black |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106586A true CN86106586A (en) | 1987-09-02 |
| CN1003508B CN1003508B (en) | 1989-03-08 |
Family
ID=4803275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86106586.7A Expired CN1003508B (en) | 1986-10-05 | 1986-10-05 | Process of producing ferroferric-oxide black |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003508B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173604A (en) * | 2020-08-05 | 2021-07-27 | 河南济源钢铁(集团)有限公司 | Method for preparing nano iron and oxide thereof by taking sintering ash as raw material |
-
1986
- 1986-10-05 CN CN86106586.7A patent/CN1003508B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173604A (en) * | 2020-08-05 | 2021-07-27 | 河南济源钢铁(集团)有限公司 | Method for preparing nano iron and oxide thereof by taking sintering ash as raw material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1003508B (en) | 1989-03-08 |
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