CN106244746B - A kind of stainless steel casting residue processing method and device - Google Patents
A kind of stainless steel casting residue processing method and device Download PDFInfo
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- CN106244746B CN106244746B CN201610826498.6A CN201610826498A CN106244746B CN 106244746 B CN106244746 B CN 106244746B CN 201610826498 A CN201610826498 A CN 201610826498A CN 106244746 B CN106244746 B CN 106244746B
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- casting residue
- screening
- grinding machine
- slow cooling
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The present invention provides a kind of stainless steel casting residue processing method and device, belongs to metallurgical solid waste and utilizes technical field.The process includes: that slow cooling is handled, screening for the first time, grinding machine is rolled, sieved for second, dewatering operation and magnetic separation are handled.The process unit includes: tipple, screening machine, grinding machine, rotary screen, dewaterer and magnetic separator.Casting residue is tumbled out by tipple and carries out slow cooling processing, casting residue by slow cooling processing carries out first time screening by screening machine, the screenings of screening machine enters in grinding machine under the impact of high pressure water further to roll, second is carried out by the rotary screen that grinding machine exit is arranged to sieve, the screenings of rotary screen enters dewaterer and carries out dewatering operation, and dewatered casting residue material is stored according to magnetic with non magnetic respectively by magnetic separator.The present invention uses Whote-wet method processing mode, and dry ash is avoided to generate, and separates metal and nonmetallic step by step, and recovery rate of iron is made to reach 90% or more.
Description
Technical field
The present invention relates to metallurgical solid wastes to utilize technical field, and specifically, in particular to a kind of stainless steel casting residue handles work
Process and device.
Background technique
According to statistics, in clinker, tenor about 10%.It is valuable rare heavy containing nickel, chromium etc. in stainless steel casting residue
Metal is such as dealt with improperly and is likely to result in serious environmental pollution, so the metal in recycling stainless steel casting residue, is realized stainless
Steel casting residue resource regeneration is the major issue that iron and steel enterprise faces.
Currently, domestic stainless steel manufacturer is mainly according to the physical characteristic of stainless steel casting residue, using the processing of hot application
Mode adsorbs the residual steel of bulk using disk to after the processing of casting residue hot application, remaining tailings is transported into stockyard stockpiling.But this
Kind hot application processing mode metal recovery rate is low, and production environment is poor.
Summary of the invention
In view of problem above, the present invention provides a kind of stainless steel casting residue processing method and device, raw to stainless steel
The casting residue generated during producing carries out the processing of efficient environmental protection, recycles the metal in casting residue, and centralized recovery tailings, real
The utilization of resources of existing tailings, solves that metal recovery rate existing for existing casting residue hot application treatment process is low, production environment difference
Problem.
A kind of stainless steel casting residue processing method of the present invention comprising following steps:
(1) casting residue slow cooling is handled；
(2) first time screening process is carried out to the casting residue Jing Guo slow cooling；
(3) oversize for sieving the first time is stored up, impact of the screenings that the first time sieves in high pressure water
Under flow into grinding machine roll it is broken；
(4) broken casting residue is rolled to the process grinding machine and carries out second of screening process；
(5) oversize by second of screening is stored up, and carries out dewatering operation to the screenings of second of screening；
(6) magnetic separation processing is carried out to by dewatered casting residue.
Preferably, the process further includes following step (7):
The grain slag generated during the step (1) and the step (5) is subjected to drainage, dries operation.
Preferably, the step (1) further includes following dust removal steps:
The dust-laden steam generated in the step (1) is carried out wet dedusting processing, discharged after up to standard by wet dedusting.
Preferably, in the step (1), slow cooling processing is using operation of manually fetching water, the activity duration is 24~
36h, and after the 1~2h of operation that fetches water, intermittent stirring operation is carried out to the casting residue after fetching water.
Preferably, in the step (5), the screenings of second of screening is the casting residue that granularity is less than 2mm, into
Row dewatering operation.
A kind of process unit for stainless steel casting residue processing method, comprising:
Tipple carries out slow cooling processing for casting residue to tumble out；
Screening machine, for carrying out first time screening process to the casting residue by slow cooling processing, on the sieve of the screening machine
Object stockpiling, the screenings of the screening machine are entered in receiver bin by the first belt feeder；
Grinding machine, the grinding machine are provided with inlet port and outlet port, lead between the feed inlet of the grinding machine and the receiver bin
Piping connection, casting residue in the receiver bin are broken downstream to rolling in the grinding machine in the impact of high pressure water；
Rotary screen is connect with the discharge port of the grinding machine, is carried out for rolling broken casting residue to the process grinding machine
Second of screening process, the oversize stockpiling of the rotary screen；
Dewaterer carries out dewatering operation for the screenings to the rotary screen；
Magnetic separator, for, according to magnetic and non magnetic further separation, being stored respectively to dewatered casting residue material.
Further, it is preferable to, the tipple is crane.
Preferably, the screening machine is one of vibration strip-type screen, grid sieve；The grinding machine is ball mill, rod mill
One of；The dewaterer is one of high-frequency dewatering screen, thickener.
Preferably, the magnetic separator is permanent magnetic pulley belt feeder.
Preferably, the process unit further include:
Dust excluding hood, positioned at the top of Pile of steel slag, for absorbing to the dust-containing water generated in casting residue slow cooling treatment process
Vapour；Wet-way dust-collector is connect by dedusting pipeline with the dust excluding hood, for carrying out at wet dedusting to the dust-laden steam
Reason.
Preferably, the process unit further include:
Sedimentation basin, for storing to the grain slag generated in casting residue slow cooling processing and dehydration process；Clamshell crane, position
In the top of the sedimentation basin, the sediment stockyard for grabbing the grain slag in the sedimentation basin to side carries out drainage and dries work
Industry.
Compared with prior art, the advantages of the present invention have:
One, the present invention uses Whote-wet method processing mode, avoids the generation of dry ash, guarantees good production environment；
Two, the present invention in the processing of casting residue use first time screening-- second screening of grinding machine-dehydration-magnetic separation
Technique realizes and separates metal and nonmetallic step by step, screening for the first time obtains the residual steel storage of big lumpiness, screenings by grinding machine into
One step rolls broken, and second screening obtains steel grit storage, and the screenings of second of screening is small grain size casting residue, after dehydration,
Material is stored respectively according to the magnetism of small grain size casting residue performance, metal recovery rate is improved, reaches 90% or more.
Detailed description of the invention
Fig. 1 is stainless steel casting residue processing technological flow figure of the present invention；
Fig. 2 is the floor plan of stainless steel casting residue treatment process device preferred embodiment of the present invention；
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is the B-B cross-sectional view of Fig. 2.
Specific embodiment
Now in conjunction with attached drawing, the present invention is described further.
Fig. 1 is stainless steel casting residue processing technological flow figure of the present invention.As shown in Figure 1, stainless steel of the present invention
Casting residue processing method the following steps are included:
(1) casting residue slow cooling is handled；
(2) first time screening process is carried out to the casting residue Jing Guo slow cooling；
(3) oversize for sieving the first time is stored up, impact of the screenings that the first time sieves in high pressure water
Under flow into grinding machine roll it is broken；
(4) broken casting residue is rolled to the process grinding machine and carries out second of screening process；
(5) oversize by second of screening is stored up, and carries out dewatering operation to the screenings of second of screening；
(6) magnetic separation processing is carried out to by dewatered casting residue；
(7) grain slag generated during the step (1) and the step (5) is subjected to drainage, dries operation.
The step (1) further includes following dust removal steps:
The dust-laden steam generated in the step (1) is carried out wet dedusting processing, is discharged into after up to standard big by wet dedusting
Gas avoids dust and drifts, to guarantee good production environment.
Fig. 2 is the floor plan of stainless steel casting residue treatment process device preferred embodiment of the present invention, and Fig. 3 is figure
2 A-A cross-sectional view, Fig. 4 are the B-B cross-sectional view of Fig. 2.
As shown in Figure 2, Figure 3 and Figure 4, stainless steel casting residue treatment process device of the present invention includes:
Crane 100 carries out slow cooling processing for tumbling the casting residue in slag ladle 110 into Pile of steel slag 120；
Strip-type screen 200 is vibrated, for carrying out first time screening process, the vibrator bar to the casting residue by slow cooling processing
The oversize of shape sieve 200, which drains into the first stockyard 210, to be stored up, and the screenings of the vibration strip-type screen is granularity less than 150mm's
Casting residue, by the first belt feeder 220 enter receiver bin 230 in, wherein it is described vibration strip-type screen 200 bar shaped steel spacing be
150mm, screen angle are 17.5 °, and Oscillation Amplitude is 6~8mm, and vibration frequency is no more than 20Hz；
Ball mill 300, the ball mill 300 are provided with feed inlet 301 and discharge port 302, wherein the feed inlet 301
Connect between the receiver bin 230 by pipeline, the casting residue in the receiver bin 230 high pressure water impact downstream to institute
State rolled in ball mill 300 it is broken, wherein the feed size of the ball mill 300 be less than 150mm, the ball mill 300 go out
Material is sieved using rotary screen；
Rotary screen, sieve are 12 mesh, are connect with the discharge port 302 of the ball mill 300, for by the ball mill
300, which roll broken casting residue, carries out second of screening process, and the oversize of the rotary screen (not shown) is the tail of 2mm or more
Slag drains into the storage of the second stockyard 420 by the second belt feeder 410, and the screenings of the rotary screen is the tail that granularity is less than 2mm
Slag carries out dewatering operation into lower road dehydration device；
High-frequency dewatering screen 500 carries out dewatering operation for the screenings to the rotary screen, wherein the high frequency dehydration
The feed size of sieve 500 is less than 2mm, and compass screen surface angle is 5~7 °, and vibration frequency is 850~1000Hz, by high-frequency dewatering screen
The casting residue moisture content of 500 effects is no more than 10%；
Permanent magnetic pulley belt feeder 600, dewatered casting residue material size are less than 2mm, are showed according to small grain size casting residue
Magnetism out selects the permanent magnetic pulley belt feeder 600 to convey material and presses casting residue material under the action of permanent magnetic pulley
It according to magnetic and non magnetic further separation, is stored respectively into third stockyard 610 and the 4th stockyard 620, wherein the permanent magnetism rolling
The transportable material size of cylinder belt feeder 600 is less than 2mm, and belt feeder width is 600mm, the third stockyard 610 and described the
Separating plate 630 (showing in Fig. 4) is provided between four stockyards 620.
In to casting residue slow cooling treatment process, dust can be generated.Dirt is caused to surrounding enviroment to avoid dust from drifting
Dye, is provided with dust excluding hood 130 in the top of Pile of steel slag 120, contains for absorbing to what is generated in casting residue slow cooling treatment process
Dirt steam；Wet-way dust-collector 140 is connect by dedusting pipeline 150 with the dust excluding hood 130, be used for the dust-laden steam into
Row wet dedusting processing passes through chimney 160 after up to standard and is discharged into atmosphere.
The slag ladle 110 of casting residue is filled under the roll-over action of crane 100, is tumbled into Pile of steel slag 120, to casting residue
Slow cooling processing using manually fetching water, after 1~2h, intermittent stirring work is carried out to the casting residue after fetching water by loading machine 170
Industry, wherein manually fetch water the activity duration for 24 hours~36h.The top of Pile of steel slag 120 is provided with dust excluding hood 130, in steel slag heap
The dust-laden steam that all operations in 120 ranges of field generate is absorbed by dust excluding hood 130, wherein dust-containing water drum includes slag of tumbling
The steam that the dust and casting residue that tank 110 generates generate during fetching water.Dust-laden steam is delivered to wet process by dedusting pipeline 150
Wet dedusting processing is carried out in dust-extraction unit 140, is discharged after up to standard by chimney 160.
It needs in the casting residue by slow cooling processing by secondary treatment.Casting residue after handling through slow cooling passes through
To vibration strip-type screen 200 top, the residual steel of big lumpiness of the oversize of the vibration strip-type screen 200 is unloaded to the transport of loading machine 170
It is stored in one stockyard 210, the screenings of the vibration strip-type screen 200 then passes through the first belt feeder 220 and is delivered to receiver bin 230
In, it is connected between the receiver bin 230 and the feed inlet 301 of ball mill 300 by pipeline.More than casting in the receiver bin 230
Slag under the impact of high pressure water enter the ball mill 300 in, steel ball roll effect repeatedly under, casting residue is further broken
It is broken.The outlet of the ball mill 300 is provided with rotary screen, the oversize of the rotary screen is the casting residue of 2mm or more, is passed through
Second belt feeder 410 is delivered in the second stockyard 420 and stores, and the screenings of the rotary screen then enters in high-frequency dewatering screen 500,
Carry out dewatering operation.Casting residue material by dehydration is conveyed by permanent magnetic pulley belt feeder 600, in the effect of permanent magnetic pulley
Under, separating plate 630 stores material according to magnetic in third stockyard 610 and the 4th stockyard 620 respectively with non magnetic.
The grain slag caused by casting residue slow cooling processing and secondary treatment drains into sedimentation basin 700, in the sedimentation basin 700
Top is provided with gate-type clamshell crane 710, is grabbed grain slag to the sediment on side by grabbing bucket by the gate-type clamshell crane 710
Drainage is carried out in stockyard 720, dries operation, and after a period of time, the tailings dried through drainage can be transported to suitable area progress
Centralized recovery realizes the comprehensive utilization of tailings resource.
In conclusion stainless steel casting residue treatment process of the present invention handles casting residue twice, it is as follows:
Slow cooling processing: using manually fetching water operation, the activity duration is 24~36h, and during processing to more than casting
Slag carries out intermittent stirring operation, and the dust excluding hood that the dust-laden steam generated in overall process is arranged on roof absorbs, by removing
Dirt pipeline is delivered to Wet-way dust-collector processing.
Secondary treatment: casting residue is by " vibration strip-type screen-ball mill-rotary screen-high-frequency dewatering screen-permanent magnetic pulley belt
Machine " is realized and separates metal and nonmetallic step by step, and vibration strip-type screen obtains granularity greater than the residual steel storage of the big lumpiness of 150mm, passes through
Further rolling for grinding machine is broken, and grinding machine outlet is provided with rotary screen discharging, and granularity can be obtained greater than 2mm's through rotary screen screening
Steel grit storage, small grain size casting residue pass through high-frequency dewatering screen dehydration, are finally cast by permanent magnetic pulley belt feeder according to small grain size
The magnetism of recrement performance stores material respectively, improves recovery rate of iron, recovery rate of iron is made to reach 90% or more.
Claims (10)
1. a kind of stainless steel casting residue processing method, which comprises the following steps:
(1) casting residue slow cooling is handled；
(2) first time screening process is carried out to the casting residue Jing Guo slow cooling；
(3) oversize for sieving the first time is stored up, and the screenings of the first time screening flows down in the impact of high pressure water
Roll into grinding machine broken；
(4) broken casting residue is rolled to the process grinding machine and carries out second of screening process；
(5) oversize by second of screening is stored up, and carries out dewatering operation to the screenings of second of screening；
(6) magnetic separation processing is carried out to by dewatered casting residue.
2. process according to claim 1, which is characterized in that the process further includes following step (7):
The grain slag generated during the step (1) and the step (5) is subjected to drainage, dries operation.
3. process according to claim 1, which is characterized in that the step (1) further includes following dust removal steps:
The dust-laden steam generated in the step (1) is carried out wet dedusting processing, discharged after up to standard by wet dedusting.
4. process according to claim 1, which is characterized in that in the step (1), the slow cooling processing is to adopt
It manually fetches water operation, the activity duration is 24~36h, and after the 1~2h of operation that fetches water, is interrupted to the casting residue after fetching water
Stirring operation.
5. process according to claim 1, which is characterized in that in the step (5), second of screening
Screenings is the casting residue that granularity is less than 2mm, carries out dewatering operation.
6. being used for the process unit of stainless steel casting residue processing method described in claim 1 characterized by comprising
Tipple carries out slow cooling processing for casting residue to tumble out；
Screening machine, for carrying out first time screening process, the oversize heap of the screening machine to the casting residue by slow cooling processing
It deposits, the screenings of the screening machine is entered in receiver bin by the first belt feeder；
Grinding machine, the grinding machine are provided with inlet port and outlet port, pass through pipe between the feed inlet of the grinding machine and the receiver bin
Road connection, casting residue in the receiver bin are broken downstream to rolling in the grinding machine in the impact of high pressure water；
Rotary screen is connect with the discharge port of the grinding machine, carries out second for rolling broken casting residue to the process grinding machine
Secondary screening process, the oversize stockpiling of the rotary screen；
Dewaterer carries out dewatering operation for the screenings to the rotary screen；
Magnetic separator, for, according to magnetic and non magnetic further separation, being stored respectively to dewatered casting residue material.
7. process unit according to claim 6, which is characterized in that the process unit further include:
Dust excluding hood, positioned at the top of Pile of steel slag, for absorbing to the dust-laden steam generated in casting residue slow cooling treatment process；
Wet-way dust-collector is connect by dedusting pipeline with the dust excluding hood, for carrying out wet dedusting to the dust-laden steam
Processing.
8. process unit according to claim 6, which is characterized in that the process unit further include:
Sedimentation basin, for storing to the grain slag generated in casting residue slow cooling processing and dehydration process；
Clamshell crane, positioned at the top of the sedimentation basin, for grabbing the grain slag in the sedimentation basin to the sediment heap on side
Field carries out drainage and dries operation.
9. process unit according to claim 6, which is characterized in that the screening machine is vibration strip-type screen, in grid sieve
One kind；The grinding machine is one of ball mill, rod mill；The dewaterer is one of high-frequency dewatering screen, thickener.
10. process unit according to claim 6, which is characterized in that the magnetic separator is permanent magnetic pulley belt feeder.
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| CN201610826498.6A CN106244746B (en) | 2016-09-14 | 2016-09-14 | A kind of stainless steel casting residue processing method and device |
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| CN201610826498.6A CN106244746B (en) | 2016-09-14 | 2016-09-14 | A kind of stainless steel casting residue processing method and device |
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| CN106244746B true CN106244746B (en) | 2019-01-04 |
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| CN206052055U (en) * | 2016-09-14 | 2017-03-29 | 中冶华天南京工程技术有限公司 | A kind of rustless steel casting residue handling process device |
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| CN102534068A (en) * | 2012-01-30 | 2012-07-04 | 山西太钢不锈钢股份有限公司 | Method for reusing common steel slag |
| CN202626212U (en) * | 2012-05-23 | 2012-12-26 | 济钢集团国际工程技术有限公司 | Moveable dust removing device |
| CN102978305B (en) * | 2012-12-15 | 2014-12-17 | 武钢集团昆明钢铁股份有限公司 | Molten steel casting residue treatment and recycling method |
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| CN206052055U (en) * | 2016-09-14 | 2017-03-29 | 中冶华天南京工程技术有限公司 | A kind of rustless steel casting residue handling process device |
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