CN111744923A - Purification treatment process for incinerator slag - Google Patents
Purification treatment process for incinerator slag Download PDFInfo
- Publication number
- CN111744923A CN111744923A CN201910247362.3A CN201910247362A CN111744923A CN 111744923 A CN111744923 A CN 111744923A CN 201910247362 A CN201910247362 A CN 201910247362A CN 111744923 A CN111744923 A CN 111744923A
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- Prior art keywords
- slag
- treatment
- metal
- magnetic separation
- incineration
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002893 slag Substances 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000000746 purification Methods 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 239000002184 metal Substances 0.000 claims abstract description 60
- 238000007885 magnetic separation Methods 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004576 sand Substances 0.000 claims abstract description 24
- 238000012216 screening Methods 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 13
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 12
- 238000000498 ball milling Methods 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- 230000001376 precipitating effect Effects 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 150000002739 metals Chemical class 0.000 claims description 13
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 2
- 239000011449 brick Substances 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005352 clarification Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a purification treatment process for incineration slag, which comprises the following steps: primary crushing treatment and screening, primary magnetic separation treatment, secondary crushing treatment, secondary magnetic separation treatment, metal buoyancy gravity separation, nonmetal tail sand multistage precipitation and ball milling treatment; the method can effectively screen out the recoverable metal contained in the incinerator slag through primary magnetic separation, secondary magnetic separation and buoyancy gravity metal treatment, improve the economic benefit of the incinerator slag, simultaneously avoid the problem that the strength of the baking-free bricks is not enough when the incinerator slag is used as the raw material of the baking-free bricks due to the fact that the metal remains in the incinerator slag, improve the secondary utilization rate of the incinerator slag, effectively reduce the pollution caused by the waste pool water by filtering, precipitating and clarifying the waste pool water generated in the evolution process of the incinerator slag in a water treatment system, simultaneously reuse the clarified substances, play the residual economic value and comprehensively improve the economic value of the incinerator slag.
Description
Technical Field
The invention relates to the technical field of slag treatment, in particular to a purification treatment process for incineration slag.
Background
The incineration slag is a general term for slag, leaked slag, boiler ash and fly ash generated in the process of waste incineration, and the incineration slag also contains a certain amount of heavy metal substances, so that resource waste and environmental pollution can be caused when a large amount of incineration slag is not utilized.
In recent years, the incinerator slag has a good development prospect as a raw material of a baking-free brick, the composition of the incinerator slag is complex, the incinerator slag contains various metals, heavy metals, garbage which is not completely burned and massive residual substances, and if the substances are directly used for preparing the baking-free brick without purification treatment, the strength of the baking-free brick is reduced, the baking-free brick is easy to crack, the baking-free brick cannot become a qualified building brick, and meanwhile, the surface of the manufactured baking-free brick has more pits and poor quality, so that the economic benefit of a manufacturer is directly influenced. Therefore, the invention provides a purification treatment process for the incinerator slag, which aims to overcome the defects in the prior art.
Disclosure of Invention
Aiming at the problems, the invention can effectively screen out the recoverable metal contained in the incinerator slag through primary magnetic separation, secondary magnetic separation and buoyancy gravity metal treatment, thereby improving the economic benefit of the incinerator slag, simultaneously avoiding the problem that the strength of the baking-free bricks is not enough when the incinerator slag is used as the raw material of the baking-free bricks because the metal remains in the incinerator slag, improving the secondary utilization rate of the incinerator slag, effectively reducing the pollution caused by the waste pool water by filtering, precipitating and clarifying the waste pool water generated in the evolution process of the incinerator slag in a water treatment system, simultaneously reusing the clarified substances, playing the residual economic value and comprehensively improving the economic value of the incinerator slag.
The invention provides a purification treatment process for incinerator slag, which is characterized by comprising the following steps of: the method comprises the following steps:
the method comprises the following steps: first-stage crushing treatment and screening
Screening the incineration slag, screening the slag which is not completely incinerated and the large slag, reserving the coarse slag, performing primary crushing treatment and screening on the screened large slag for many times until the size of the large slag is the same as that of the coarse slag, and mixing the large slag with the coarse slag;
step two: first-stage magnetic separation treatment
Performing primary magnetic separation treatment on the coarse slag obtained in the step one to remove magnetic separation metals in the coarse slag;
step three: second stage crushing treatment
Carrying out secondary crushing treatment on the coarse slag from which the magnetic separation metal is removed in the second step, screening again after the secondary crushing treatment, and screening out coarse slag with larger size to obtain fine slag;
step four: two-stage magnetic separation treatment
Performing secondary magnetic separation treatment on the fine slag obtained in the third step to remove magnetic metals in the fine slag;
step five: buoyant gravity separation of metals
Placing the fine slag from which the magnetic metal is removed in the fourth step into a water pool for buoyancy gravity metal treatment, and removing metal substances by using the principle of different metal density to obtain non-metal tail sand;
step six: multi-stage precipitation of non-metal tailings
Putting the nonmetal tail sand obtained in the fifth step into a precipitation water tank for multistage precipitation, and then filtering to obtain middle-grade sand;
step seven: ball milling treatment
And D, performing ball milling treatment on the medium-grade sand obtained in the sixth step by adopting a ball mill to prepare the environment-friendly sand.
The further improvement lies in that: and (4) carrying out re-melting incineration on the slag which is screened out in the first step and is not completely incinerated.
The further improvement lies in that: and the magnetic separation metal after the first-stage magnetic separation treatment in the second step and the magnetic metal after the second-stage magnetic separation treatment in the fourth step can be recovered.
The further improvement lies in that: and in the third step, the coarse slag from which the magnetic separation metal is removed in the second step is firstly subjected to secondary crushing treatment, screening is carried out again after the secondary crushing treatment, coarse slag with larger size is screened out to obtain fine slag, and the screened coarse slag with larger size is subjected to multiple crushing and screening until the grain grades of the coarse slag with larger size and the fine slag are the same, and then the coarse slag with larger size and the fine slag are mixed.
The further improvement lies in that: and the crushing size grade of the second-stage crushing treatment in the third step is smaller than that of the first-stage crushing treatment in the first step.
The further improvement lies in that: and fifthly, putting the fine slag from which the magnetic metal is removed in the fourth step into a water tank for buoyancy gravity metal treatment, wherein the fine slag needs to be continuously stirred in the buoyancy gravity metal treatment process, removing the metal substances layer by using the principle that different metal densities are different, and collecting the removed metal substances layer by using a fishing net to obtain the nonmetal tail sand.
The further improvement lies in that: and sixthly, filtering, precipitating and clarifying the waste pool water in the sedimentation pool after filtering treatment in the step six by using a water treatment system, clarifying the unfiltered environment-friendly sand and other organic substances mixed in the waste pool water, and collecting and utilizing the environment-friendly sand.
The further improvement lies in that: and carrying out furnace returning incineration on the organic substances clarified from the waste pool water.
The further improvement lies in that: and in the seventh step, the ball milling treatment time is 1-2 hours.
The invention has the beneficial effects that: through one-level magnetic separation, recoverable metal that second grade magnetic separation and buoyancy gravity metal processing can effectually be contained in the incineration slag of selecting, improve the economic benefits of incineration slag, can avoid the metal to remain and influence the problem that the burning-free brick intensity that causes is not enough when incineration slag is as burning-free brick raw and other materials in the incineration slag simultaneously, the reutilization rate of incineration slag has been improved, through carrying out the filtration of water processing system with the abandonment pond water that produces in the incineration slag evolution process, deposit and clarification, can effectually reduce the pollution that abandonment pond water caused, the material that clears out simultaneously can reuse, exert surplus economic value, the economic value of incineration slag has been improved comprehensively, simultaneously can effectually solve the pollution problem that a large amount of abandonment incineration slag brought to the environment, belong to green sustainable production.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
A purification treatment process for incinerator slag is characterized in that: the method comprises the following steps:
the method comprises the following steps: first-stage crushing treatment and screening
Screening the incineration slag, screening out slag which is not completely incinerated and large slag, reserving coarse slag, performing primary crushing treatment and screening on the screened large slag for many times until the large slag is crushed to be the same as the coarse slag in size fraction, mixing the large slag with the coarse slag, and performing secondary incinerator incineration on the screened slag which is not completely incinerated;
step two: first-stage magnetic separation treatment
Performing primary magnetic separation treatment on the coarse slag obtained in the step one to remove magnetic separation metals in the coarse slag, wherein the magnetic separation metals can be recovered;
step three: second stage crushing treatment
Firstly, performing secondary crushing treatment on the coarse slag from which the magnetic separation metal is removed in the second step, screening the coarse slag again after the secondary crushing treatment, screening the coarse slag with larger size to obtain fine slag, crushing and screening the coarse slag with larger size for multiple times until the coarse slag with larger size and the fine slag have the same size fraction, and mixing the coarse slag with the fine slag, wherein the crushing size fraction of the secondary crushing treatment is smaller than that of the primary crushing treatment in the first step;
step four: two-stage magnetic separation treatment
Performing secondary magnetic separation treatment on the fine slag obtained in the third step, and removing magnetic metals in the fine slag, wherein the magnetic metals can be recovered;
step five: buoyant gravity separation of metals
Firstly, putting the fine slag from which the magnetic metal is removed in the fourth step into a water pool for buoyancy gravity metal treatment, wherein the fine slag needs to be continuously stirred in the buoyancy gravity metal treatment process, removing metal substances layer by using the principle that different metals have different densities, and collecting the removed metal substances layer by using a fishing net to obtain non-metal tail sand;
step six: multi-stage precipitation of non-metal tailings
Putting the nonmetal tail sand obtained in the fifth step into a sedimentation water tank for multistage sedimentation, then carrying out filtration treatment to obtain middle-grade sand, filtering, settling and clarifying waste tank water in the sedimentation water tank after the filtration treatment by a water treatment system, clarifying the unfiltered environment-friendly sand and other organic substances mixed in the waste tank water, collecting and utilizing the environment-friendly sand, and carrying out furnace return incineration on the clarified organic substances;
step seven: ball milling treatment
And D, performing ball milling treatment on the medium-grade sand obtained in the sixth step by using a ball mill to prepare the environment-friendly sand, wherein the ball milling treatment time is 2 hours.
Through one-level magnetic separation, recoverable metal that second grade magnetic separation and buoyancy gravity metal processing can effectually be contained in the incineration slag of selecting, improve the economic benefits of incineration slag, can avoid the metal to remain and influence the problem that the burning-free brick intensity that causes is not enough when incineration slag is as burning-free brick raw and other materials in the incineration slag simultaneously, the reutilization rate of incineration slag has been improved, through carrying out the filtration of water processing system with the abandonment pond water that produces in the incineration slag evolution process, deposit and clarification, can effectually reduce the pollution that abandonment pond water caused, the material that clears out simultaneously can reuse, exert surplus economic value, the economic value of incineration slag has been improved comprehensively, simultaneously can effectually solve the pollution problem that a large amount of abandonment incineration slag brought to the environment, belong to green sustainable production.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A purification treatment process for incinerator slag is characterized in that: the method comprises the following steps:
the method comprises the following steps: first-stage crushing treatment and screening
Screening the incineration slag, screening the slag which is not completely incinerated and the large slag, reserving the coarse slag, performing primary crushing treatment and screening on the screened large slag for many times until the size of the large slag is the same as that of the coarse slag, and mixing the large slag with the coarse slag;
step two: first-stage magnetic separation treatment
Performing primary magnetic separation treatment on the coarse slag obtained in the step one to remove magnetic separation metals in the coarse slag;
step three: second stage crushing treatment
Carrying out secondary crushing treatment on the coarse slag from which the magnetic separation metal is removed in the second step, screening again after the secondary crushing treatment, and screening out coarse slag with larger size to obtain fine slag;
step four: two-stage magnetic separation treatment
Performing secondary magnetic separation treatment on the fine slag obtained in the third step to remove magnetic metals in the fine slag;
step five: buoyant gravity separation of metals
Placing the fine slag from which the magnetic metal is removed in the fourth step into a water pool for buoyancy gravity metal treatment, and removing metal substances by using the principle of different metal density to obtain non-metal tail sand;
step six: multi-stage precipitation of non-metal tailings
Putting the nonmetal tail sand obtained in the fifth step into a precipitation water tank for multistage precipitation, and then filtering to obtain middle-grade sand;
step seven: ball milling treatment
And D, performing ball milling treatment on the medium-grade sand obtained in the sixth step by adopting a ball mill to prepare the environment-friendly sand.
2. The purification treatment process of the incineration slag according to claim 1, characterized in that: and (4) carrying out re-melting incineration on the slag which is screened out in the first step and is not completely incinerated.
3. The purification treatment process of the incineration slag according to claim 1, characterized in that: and the magnetic separation metal after the first-stage magnetic separation treatment in the second step and the magnetic metal after the second-stage magnetic separation treatment in the fourth step can be recovered.
4. The purification treatment process of the incineration slag according to claim 1, characterized in that: and in the third step, the coarse slag from which the magnetic separation metal is removed in the second step is firstly subjected to secondary crushing treatment, screening is carried out again after the secondary crushing treatment, coarse slag with larger size is screened out to obtain fine slag, and the screened coarse slag with larger size is subjected to multiple crushing and screening until the grain grades of the coarse slag with larger size and the fine slag are the same, and then the coarse slag with larger size and the fine slag are mixed.
5. The purification treatment process of the incineration slag according to claim 1, characterized in that: and the crushing size grade of the second-stage crushing treatment in the third step is smaller than that of the first-stage crushing treatment in the first step.
6. The purification treatment process of the incineration slag according to claim 1, characterized in that: and fifthly, putting the fine slag from which the magnetic metal is removed in the fourth step into a water tank for buoyancy gravity metal treatment, wherein the fine slag needs to be continuously stirred in the buoyancy gravity metal treatment process, removing the metal substances layer by using the principle that different metal densities are different, and collecting the removed metal substances layer by using a fishing net to obtain the nonmetal tail sand.
7. The purification treatment process of the incineration slag according to claim 1, characterized in that: and sixthly, filtering, precipitating and clarifying the waste pool water in the sedimentation pool after filtering treatment in the step six by using a water treatment system, clarifying the unfiltered environment-friendly sand and other organic substances mixed in the waste pool water, and collecting and utilizing the environment-friendly sand.
8. The purification treatment process of the incineration slag according to claim 7, characterized in that: and carrying out furnace returning incineration on the organic substances clarified from the waste pool water.
9. The purification treatment process of the incineration slag according to claim 1, characterized in that: and in the seventh step, the ball milling treatment time is 1-2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910247362.3A CN111744923A (en) | 2019-03-29 | 2019-03-29 | Purification treatment process for incinerator slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910247362.3A CN111744923A (en) | 2019-03-29 | 2019-03-29 | Purification treatment process for incinerator slag |
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| Publication Number | Publication Date |
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| CN111744923A true CN111744923A (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910247362.3A Pending CN111744923A (en) | 2019-03-29 | 2019-03-29 | Purification treatment process for incinerator slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112718780A (en) * | 2020-11-11 | 2021-04-30 | 广东忠能科技集团有限公司 | Treatment process for preposed sand washing and mud removing furnace slag |
| CN114273385A (en) * | 2021-12-22 | 2022-04-05 | 中国十七冶集团有限公司 | Integrated dry and wet treatment method for slag hole waste residues |
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| CN114273385A (en) * | 2021-12-22 | 2022-04-05 | 中国十七冶集团有限公司 | Integrated dry and wet treatment method for slag hole waste residues |
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Application publication date: 20201009 |