CN115213103A - Method for recovering kiln slag iron powder - Google Patents
Method for recovering kiln slag iron powder Download PDFInfo
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- CN115213103A CN115213103A CN202210884585.2A CN202210884585A CN115213103A CN 115213103 A CN115213103 A CN 115213103A CN 202210884585 A CN202210884585 A CN 202210884585A CN 115213103 A CN115213103 A CN 115213103A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a method for recovering kiln slag iron powder, belongs to the technical field of kiln slag processing, and solves the technical problem that the existing kiln slag cannot recover iron-containing materials. The method comprises the following steps: obtaining kiln slag in a rotary kiln; performing primary magnetic separation treatment on the obtained kiln slag to obtain magnetic materials in the kiln slag; performing primary ball milling treatment on the obtained magnetic material to obtain a primary magnetic material; screening the obtained primary magnetic material to obtain a screened secondary magnetic material; carrying out secondary magnetic separation treatment on the obtained secondary magnetic material to obtain a tertiary magnetic material; performing secondary ball milling treatment on the obtained three-level magnetic material to obtain a four-level magnetic material; carrying out three-stage magnetic separation treatment on the obtained four-stage magnetic material to obtain a five-stage magnetic material; and carrying out primary gravity separation treatment on the obtained five-level magnetic material to obtain a six-level magnetic material. The method can improve the utilization rate of the pit slag, recover the iron-containing materials and improve the economic value.
Description
Technical Field
The invention belongs to the technical field of kiln slag processing, and particularly relates to a method for recovering kiln slag iron powder.
Background
The recycling and zero-waste of zinc-containing dust and sludge of iron and steel enterprises become the subject of the co-research of the world, and the large iron and steel enterprises such as Baoku, saddle steel and the like take the solid waste zero-leaving factory as the target and put into practice. At present, a small amount of zinc-containing dust and sludge in a steel plant is recycled and sold outside, and a large amount of the rest is stockpiled to cause resource waste.
The zinc-containing dust and mud has large stockpiling and occupied area, high environmental protection risk and low cost for external sales, part of steel mills adopt a high-temperature fire method to separate and incinerate organic matters, zinc and iron elements are reduced and enriched, and the collected zinc oxide can be sold for external sales, however, the kiln slag treated by the rotary kiln still contains 55 percent of TFe, and at present, no feasible method is available for the recovery of the TFe.
Disclosure of Invention
The method aims to solve the technical problem that the existing kiln slag cannot recover iron-containing materials at least to a certain extent, and therefore the method for recovering the kiln slag iron powder is provided.
The technical scheme of the application is as follows:
a method for recovering kiln slag iron powder comprises the following steps:
obtaining kiln slag in a rotary kiln;
performing primary magnetic separation treatment on the obtained kiln slag to obtain magnetic materials in the kiln slag;
performing primary ball milling treatment on the obtained magnetic material to obtain a primary magnetic material;
screening the obtained primary magnetic material to obtain a screened secondary magnetic material;
carrying out secondary magnetic separation treatment on the obtained secondary magnetic material to obtain a tertiary magnetic material;
performing secondary ball milling treatment on the obtained three-level magnetic material to obtain a four-level magnetic material;
carrying out three-stage magnetic separation treatment on the obtained four-stage magnetic material to obtain a five-stage magnetic material;
and carrying out gravity separation treatment on the obtained five-grade magnetic material to obtain a six-grade magnetic material.
In some embodiments, in the step of performing primary magnetic separation treatment on the obtained kiln slag to obtain the magnetic material in the kiln slag, the residual kiln slag which is not obtained by the primary magnetic treatment is recycled into the rotary kiln.
In some embodiments, in the step of screening the obtained primary magnetic material to obtain the screened secondary magnetic material, the unscreened material is subjected to four-stage magnetic separation to obtain a large-particle magnetic material.
In some embodiments, in the step of performing secondary magnetic separation on the obtained secondary magnetic material to obtain a tertiary magnetic material, the material not obtained by the secondary magnetic separation is dehydrated to obtain a tertiary secondary material, and the tertiary secondary material is subjected to gravity separation to obtain the iron-containing material.
In some embodiments, in the step of performing three-stage magnetic separation on the obtained four-stage magnetic material to obtain five-stage magnetic material, the material which is not obtained is dehydrated and recycled into the rotary kiln.
In some embodiments, after the step of performing gravity separation on the obtained five-grade magnetic material to obtain six-grade magnetic material, the obtained six-grade magnetic material is dried and the dried magnetic material is recovered.
In some embodiments, the step of recovering the magnetic material comprises: filtering six-level magnetic materials, drying the filtered six-level magnetic materials, grading the sizes of the dried six-level magnetic materials, and storing the graded magnetic materials.
In some embodiments, in the step of performing gravity separation on the obtained five-grade magnetic material to obtain six-grade magnetic material, the material which is not obtained by the gravity separation is subjected to dehydration treatment, and the dehydrated material is subjected to ball pressing treatment and recovered.
In some embodiments, the secondary magnetic separation process and the tertiary magnetic separation process both employ wet semi-countercurrent magnetic separators.
In some embodiments, the size of the large-sized magnetic material obtained by the sieving treatment is greater than 3mm.
The embodiment of the application has at least the following beneficial effects:
according to the technical scheme, the recovery method disclosed by the application comprises the step 300 of processing magnetic materials, separating the magnetic materials from impurities, and obtaining the first-stage magnetic materials with smaller particle sizes, so that the first-stage magnetic materials are screened in the step 400, the parts with larger particle sizes are removed and recovered, the second-stage magnetic materials with smaller particle sizes are subjected to further magnetic separation, the non-magnetic parts are further screened out to obtain third-stage magnetic materials, the second-stage ball milling is further performed to obtain fourth-stage magnetic materials with smaller particle sizes, the non-magnetic materials are further separated from the magnetic materials, then the fifth-stage magnetic materials with high iron content are selected through the third-stage magnetic separation, and the sixth-stage magnetic materials with higher iron content are obtained through gravity separation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 shows a schematic flow diagram of a recovery method in an embodiment of the present application;
fig. 2 shows a further schematic flow diagram of the recovery method in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The zinc-containing dust and sludge is large in stockpiling area, high in environmental protection risk and low in export price, so that most of the zinc-containing dust and sludge in a steel plant is stockpiled and cannot be recycled in time, and resource waste is caused. And (3) separating and incinerating organic matters by adopting a high-temperature fire method in part of steel plants, reducing and enriching zinc and iron elements, and externally selling recovered zinc oxide, wherein the content of TFe (total iron) in kiln slag treated by the rotary kiln is up to 55%, and the iron element in the kiln slag is not recycled.
The application is described below with reference to specific embodiments in conjunction with the following drawings:
as shown in fig. 1 and 2, the present embodiment provides a method for recovering fine iron of kiln slag, including the following steps:
step 100: obtaining kiln slag in a rotary kiln;
step 200: performing primary magnetic separation treatment on the obtained kiln slag to obtain magnetic materials in the kiln slag;
step 300: performing primary ball milling treatment on the obtained magnetic material to obtain a primary magnetic material;
step 400: screening the obtained primary magnetic material to obtain a screened secondary magnetic material;
step 500: carrying out secondary magnetic separation treatment on the obtained secondary magnetic material to obtain a tertiary magnetic material;
step 600: performing secondary ball milling treatment on the obtained three-level magnetic material to obtain a four-level magnetic material;
step 700: carrying out three-stage magnetic separation treatment on the obtained four-stage magnetic material to obtain a five-stage magnetic material;
step 800: and carrying out primary gravity separation treatment on the obtained five-level magnetic material to obtain a six-level magnetic material.
Above, it can be understood that, kiln slag after zinc element recovery is collected to this embodiment, utilizes the characteristics that iron-containing element has magnetism in the kiln slag, obtains the magnetic material in the kiln slag through one-level magnetic separation processing, accomplishes the preliminary screening to the kiln slag. The particle sizes of the materials in the cellar slag are different, generally, the particle size of the magnetic materials after primary magnetic separation treatment is 30mm-100mm, and the magnetic materials are a mixture of impurities and iron-containing materials, therefore, the embodiment processes the magnetic materials through step 300, separates the magnetic materials from the impurities, obtains the primary magnetic materials with smaller particle sizes, screens the primary magnetic materials through step 400, rejects and recovers the parts with larger particle sizes, and further performs magnetic separation on the secondary magnetic materials with smaller particle sizes, so as to further screen the non-magnetic parts to obtain the tertiary magnetic materials. Third-level magnetic material at this moment still has the granule that magnetic iron and other impurity mix in, therefore, this embodiment further carries out second grade ball-milling processing, in order to obtain the level four magnetic material that the granularity is littleer, further with nonmagnetic material and magnetic material separation, select the high five-level magnetic material of iron content through tertiary magnetic separation processing after that, and select through gravity and acquire the higher six-level magnetic material of iron content, can understand, this embodiment grinds magnetic material in proper order through twice ball-milling processing, and select through cubic magnetic separation processing and a gravity and handle the higher iron-containing material of the higher degree of purity, the rate of recovery is high, and economic benefits is good.
In step 200, the residual kiln slag which is not obtained by the primary magnetic treatment is recycled into the rotary kiln, specifically, in the using process of the rotary kiln, a non-magnetic material is required to be added as an additive, so that the residual kiln slag which is not obtained by the primary magnetic treatment is recycled and added into the rotary kiln according to production requirements, and it can be understood that the additive which is required to be added into the original rotary kiln can be reduced, so that the non-magnetic substances in the rotary kiln are increased, the using amount of the additive can be saved to a certain extent, a small amount of magnetic iron which can be obtained from the residual kiln slag can be processed and recycled through steps 100-200 again after the rotary kiln is processed, and the recovery rate of the magnetic iron is increased to a certain extent.
In the step 400, the unscreened material is subjected to four-stage magnetic separation to obtain a large-particle magnetic material, the content of MFe in the large-particle magnetic material is 65-85%, the large-particle magnetic material can be recycled without further treatment, and the tailings which are not obtained by the four-stage magnetic separation can be directly discharged after dehydration.
Step 500 further comprises step 501: and (3) dehydrating the material which is not obtained by the second-stage magnetic separation treatment to obtain a third-stage secondary material, and performing second-stage gravity separation treatment on the third-stage secondary material to obtain an iron-containing material. Specifically, the amount of the material after the first-stage ball milling in the step 300 is large, and the situation that the magnetic material cannot be completely adsorbed by the second-stage magnetic separation treatment exists, so that the magnetic material is further screened in the step 501, and the magnetic material in the third-stage secondary material can be screened and recovered by the second-stage gravity separation treatment by utilizing the extraction points with different densities of the magnetic material and the non-magnetic material, so that the recovery rate of the iron element in the cellar slag is further improved.
After step 800, the iron content in the obtained six-grade magnetic material is high, and meets the requirement of recovery, so that the method further comprises the following step 900 after step 800: and drying the obtained six-grade magnetic material and recovering the dried magnetic material so as to be convenient for packaging and storing the magnetic material. Specifically, the present embodiment further includes step 901: filtering six-level magnetic materials to filter moisture in the six-level magnetic materials, then drying the filtered six-level magnetic materials by using a drying kiln, carrying out size classification on the dried six-level magnetic materials by using a vibration classifier, and storing the classified magnetic materials. The first-stage gravity separation treatment is to load water and a six-stage magnetic material into a gravity separation device together, and the water content of the six-stage magnetic material after the first-stage gravity separation treatment is about 30 percent, so that in order to improve the drying efficiency of the iron powder, the water content of the six-stage magnetic material is reduced to 8-12 percent by a filter and then the six-stage magnetic material enters a drying kiln for drying; generally, a bucket elevator is arranged between the drying kiln and the vibration classifier to transfer the dried materials.
The present embodiment further includes step 902: and (3) dehydrating the materials which are not obtained by gravity separation, and performing ball pressing treatment and recycling on the dehydrated materials. Specifically, after the third-level magnetic material is subjected to the second-level ball milling treatment in step 600, the particle size of the material is further reduced, and due to the steps 200 to 700 which are performed in the preceding step, the material which is not obtained in step 800 is concentrate powder which mainly comprises iron-containing minerals such as Fe3O4 and Fe2O3, wherein MFe is 65% to 75%, the density of the iron-containing compounds is lower than that of iron, the concentrate powder can be separated from iron powder through gravity separation, and the iron content in the concentrate powder is higher.
In this embodiment, the second-stage magnetic separation treatment adopts a wet concurrent magnetic separator, and the third-stage magnetic separation treatment adopts a wet semi-countercurrent magnetic separator. The downstream magnetic separator adds water into the secondary magnetic material to make the secondary magnetic material be slurry, so that the moving direction of the secondary magnetic material is consistent with the rotating direction of a cylinder of the magnetic separator. The second-level magnetic material directly enters the lower part of the magnetic system of the cylinder from the ore feeding box, and the non-magnetic ore particles and the ore particles with weak magnetism are discharged from the gap between the two bottoms below the cylinder. The three-level magnetic material is attracted on the surface of the cylinder, rotates to the weak magnetic field position at the edge of the magnetic system along with the cylinder, and is discharged into the concentrate tank by the ore discharge water pipe. The downstream magnetic separator has simple structure and strong processing capacity. After the second-stage magnetic separation treatment, the amount of the materials is reduced, the requirement on the processing capacity of the magnetic separator is lowered, therefore, the wet-type semi-countercurrent magnetic separator is adopted in the third-stage magnetic separation treatment, the third-stage magnetic materials enter the separation space from the lower part of the groove body of the wet-type semi-countercurrent magnetic separator in a loose suspension state, the movement direction of ore pulp is basically the same as the direction of magnetic field force, the fifth-stage magnetic materials can reach the surface of a cylinder with high magnetic field force, the fourth-stage magnetic materials are subjected to the second-stage ball milling treatment to obtain smaller particle size, and the use of the wet-type semi-countercurrent magnetic separator can enable the embodiment to obtain higher concentrate quality and metal recovery rate. Multiple wet semi-countercurrent magnetic separators can be used in series, and the grade of five-level magnetic materials is improved.
Thus, step 700 further comprises step 701: the method comprises the steps of dehydrating and discharging materials which are not obtained through three-stage magnetic separation treatment, specifically, tail mud subjected to magnetic separation by a wet-type semi-countercurrent magnetic separator has an iron content of below 2% and no economic value, is stored after dehydration, and is discharged after being fully stacked in a material pool.
More specifically, in this embodiment, the magnetic roller belt conveyor is used for the magnetic separation treatment, the discharge cylindrical screen is used for the screening treatment, the magnetic roller belt conveyor is used for the four-stage magnetic separation treatment, and in the step of obtaining the three-stage secondary material, the fine-grained sludge spiral dewatering conveyor is used for dewatering the material which is not obtained by the two-stage magnetic separation treatment.
In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate orientations or positional relationships that are based on the orientations or positional relationships illustrated in the figures, but are used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus, are not to be considered limiting of the present application.
It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Furthermore, descriptions in this application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The method for recovering the kiln slag iron powder is characterized by comprising the following steps of:
obtaining kiln slag in a rotary kiln;
performing primary magnetic separation treatment on the obtained kiln slag to obtain magnetic materials in the kiln slag;
performing primary ball milling treatment on the obtained magnetic material to obtain a primary magnetic material;
screening the obtained primary magnetic material to obtain a screened secondary magnetic material;
carrying out secondary magnetic separation treatment on the obtained secondary magnetic material to obtain a tertiary magnetic material;
performing secondary ball milling treatment on the obtained three-level magnetic material to obtain a four-level magnetic material;
carrying out three-stage magnetic separation treatment on the obtained four-stage magnetic material to obtain a five-stage magnetic material;
and carrying out primary gravity separation treatment on the obtained five-level magnetic material to obtain a six-level magnetic material.
2. The method for recycling the kiln slag iron powder as claimed in claim 1, wherein in the step of performing primary magnetic separation treatment on the obtained kiln slag to obtain the magnetic materials in the kiln slag, the residual kiln slag which is not obtained by the primary magnetic treatment is recycled into the rotary kiln.
3. The method for recovering the kiln slag iron powder as claimed in claim 1, wherein in the step of screening the obtained primary magnetic material to obtain the screened secondary magnetic material, the unscreened material is subjected to four-stage magnetic separation to obtain the large-particle magnetic material.
4. The method for recovering kiln slag iron powder as claimed in claim 1, wherein in the step of subjecting the obtained secondary magnetic material to secondary magnetic separation to obtain a tertiary magnetic material, the material which is not obtained by the secondary magnetic separation is subjected to dehydration to obtain a tertiary secondary material, and the tertiary secondary material is subjected to secondary gravity separation to obtain an iron-containing material.
5. The method for recycling the kiln slag iron powder as claimed in claim 1, wherein in the step of performing three-level magnetic separation on the obtained four-level magnetic material to obtain five-level magnetic material, the material which is not obtained is dehydrated and recycled into the rotary kiln.
6. The method for recycling kiln slag iron powder as claimed in claim 1, wherein after the step of performing primary gravity separation on the obtained five-grade magnetic material to obtain six-grade magnetic material, the obtained six-grade magnetic material is dried and the dried magnetic material is recycled.
7. The method for recovering the kiln slag iron powder as claimed in claim 6, wherein the step of recovering the magnetic material comprises the steps of: filtering six-level magnetic materials, drying the filtered six-level magnetic materials, grading the sizes of the dried six-level magnetic materials, and storing the graded magnetic materials.
8. The method for recycling kiln slag iron powder as claimed in claim 6, wherein in the step of performing first-level gravity separation treatment on the obtained five-level magnetic material to obtain six-level magnetic material, the material which is not obtained by gravity separation is subjected to dehydration treatment, and the dehydrated material is subjected to ball pressing treatment and recycled.
9. The method for recovering the kiln slag iron powder as claimed in claim 1, wherein the secondary magnetic separation treatment adopts a wet concurrent magnetic separator, and the tertiary magnetic separation treatment adopts a wet semi-countercurrent magnetic separator.
10. The method for recovering the kiln slag iron powder as claimed in claim 1, wherein in the step of obtaining the tertiary secondary material, a fine-grained sludge spiral dewatering conveyor is adopted to dewater the material which is not obtained by the secondary magnetic separation treatment.
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| CN202210884585.2A CN115213103A (en) | 2022-07-25 | 2022-07-25 | Method for recovering kiln slag iron powder |
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| CN202210884585.2A CN115213103A (en) | 2022-07-25 | 2022-07-25 | Method for recovering kiln slag iron powder |
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| CN103042223A (en) * | 2012-12-21 | 2013-04-17 | 宁夏众磊鑫科技实业有限公司 | Reduced iron powder production process |
| CN108636594A (en) * | 2018-05-24 | 2018-10-12 | 萍乡市拓源实业有限公司 | A kind of revolution kiln slag selects iron method |
| CN111094601A (en) * | 2017-06-23 | 2020-05-01 | 英美资源服务（英国）有限公司 | Beneficiation of valuable metals from ores by heap leaching process |
| CN111085336A (en) * | 2019-12-31 | 2020-05-01 | 江西理工大学 | Method for recovering iron raw material from rotary kiln slag and harmlessly converting tail slag |
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2022
- 2022-07-25 CN CN202210884585.2A patent/CN115213103A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101161350A (en) * | 2007-11-29 | 2008-04-16 | 王少祖 | Debris recovery iron ore powder system and method |
| CN102794226A (en) * | 2012-08-31 | 2012-11-28 | 本溪市平山区佳鑫铁选厂 | Mineral processing method of fine-particle magnetite |
| CN103042223A (en) * | 2012-12-21 | 2013-04-17 | 宁夏众磊鑫科技实业有限公司 | Reduced iron powder production process |
| CN111094601A (en) * | 2017-06-23 | 2020-05-01 | 英美资源服务（英国）有限公司 | Beneficiation of valuable metals from ores by heap leaching process |
| CN108636594A (en) * | 2018-05-24 | 2018-10-12 | 萍乡市拓源实业有限公司 | A kind of revolution kiln slag selects iron method |
| CN111085336A (en) * | 2019-12-31 | 2020-05-01 | 江西理工大学 | Method for recovering iron raw material from rotary kiln slag and harmlessly converting tail slag |
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