CN116889969A - Household garbage slag sorting process - Google Patents
Household garbage slag sorting process Download PDFInfo
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- CN116889969A CN116889969A CN202310632496.3A CN202310632496A CN116889969A CN 116889969 A CN116889969 A CN 116889969A CN 202310632496 A CN202310632496 A CN 202310632496A CN 116889969 A CN116889969 A CN 116889969A
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- slag
- magnetic
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- blocks
- iron
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Links
- 238000000034 method Methods 0.000 title claims abstract description 108
- 239000002893 slag Substances 0.000 title claims abstract description 94
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 114
- 238000007885 magnetic separation Methods 0.000 claims abstract description 62
- 229910052742 iron Inorganic materials 0.000 claims abstract description 39
- 238000010009 beating Methods 0.000 claims abstract description 25
- 238000012216 screening Methods 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 238000007873 sieving Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 120
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 46
- 239000011707 mineral Substances 0.000 claims description 46
- 239000006148 magnetic separator Substances 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 241001584775 Tunga penetrans Species 0.000 claims description 29
- 230000005484 gravity Effects 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 239000010935 stainless steel Substances 0.000 claims description 17
- 239000000696 magnetic material Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 229910000510 noble metal Inorganic materials 0.000 claims description 5
- 239000010970 precious metal Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 238000004056 waste incineration Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 15
- 150000002739 metals Chemical class 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- 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
Abstract
The invention discloses a household garbage slag sorting process, and aims to provide a household garbage slag sorting process capable of effectively sorting household garbage slag, removing impurities, sorting metals with recovery values and comprehensively utilizing the metals to achieve the maximization of value. It comprises the following steps: a screening procedure of a rotary screen No. 1; magnetic separation step one; a manual sorting procedure; crushing; a permanent magnet roller deironing procedure; a slag beating process; a first wet magnetic separation procedure; a step of iron tapping; magnetic separation is carried out on the second step; a screening procedure of a rotary screen No. 2; a first stage jigging process; a second-stage jigging procedure; a step of manually getting up; crushing and sorting; a first-stage classification procedure; vortex separation No. 1; a second-stage classification step; vortex separation No. 2 procedure; and (5) dehydrating and sieving.
Description
Technical Field
The invention relates to the field of slag separation, in particular to a household garbage slag separation process.
Background
More and more household garbage incineration power plants are being built in China, and household garbage is subjected to 'reduction, harmless and recycling' treatment. But after a large amount of household garbage is burned, slag accounting for 20% -30% of the total garbage can be generated. With the increase of the number of the garbage incineration power plants, the generated slag amount is increased, and the landfill cost of the slag is increased year by year, so that the comprehensive utilization of the slag is gradually scheduled. However, because the slag has complex components and more impurities, the impurities are removed after the slag is effectively separated, and metals in the slag are separated to obtain various regenerated aggregates and regenerated sand products, thereby realizing comprehensive utilization. In view of this, how to select iron powder, noble metal, unburnt substances, bulk stainless steel, copper powder and the like which have recovery values is very valuable for the comprehensive utilization of household garbage slag.
Disclosure of Invention
The invention aims to provide the household garbage slag sorting process which can effectively sort the household garbage slag, remove sundries, sort out metals with recovery value and comprehensively utilize the metals to achieve the maximization of value.
The technical scheme of the invention is as follows:
a household garbage slag sorting process comprises the following steps:
a screening procedure of a rotary screen No. 1, namely conveying the waste incineration slag to the rotary screen for material classification, and dividing the slag into oversized particle-grade material blocks, medium-large particle-grade material blocks and small particle-grade material blocks;
a first magnetic separation procedure, which comprises a No. 1 magnetic separator and a No. 2 magnetic separator, wherein medium-large-size material blocks are conveyed to the No. 1 magnetic separator to select magnetic material blocks, and small-size material blocks are conveyed to the No. 2 magnetic separator to select magnetic material blocks;
a permanent magnet roller deironing procedure, wherein the materials after magnetic separation of the No. 2 magnetic separator are conveyed into a permanent magnet roller in the permanent magnet roller deironing procedure, and magnetic material blocks and part of magnetic iron powder are separated;
a slag beating step, namely conveying the material subjected to magnetic separation in the permanent magnet roller iron removal step into a slag beating machine in the slag beating step, and crushing the material with water to enable the grain size of the material to be less than or equal to 18 mm;
and a first wet magnetic separation step, namely conveying the crushed materials in the slag forming step to a wet magnetic separator in the first wet magnetic separation step, and separating out magnetic iron powder.
Preferably, the method further comprises the following steps: further comprises:
a manual sorting procedure, namely conveying the materials subjected to magnetic separation by the No. 1 magnetic separator to a manual sorting station for manual sorting, sorting unburnt matters and large stainless steel blocks, and placing the unburnt matters and the large stainless steel blocks in a buffer bin for temporary storage;
a crushing step, namely conveying the rest materials after the separation in the manual separation step to a crusher, and crushing the rest materials into material blocks with the diameter of less than or equal to 50 mm; then, the material block is conveyed to a rotary screen in the screening procedure of the rotary screen No. 1 again for material classification.
Preferably, the method further comprises the following steps:
a first-stage jigging procedure, wherein the materials after the magnetic separation in the first wet magnetic separation procedure are conveyed into a first-stage jigger in the first-stage jigging procedure, and the materials are divided into a bottom mineral aggregate of the bed and an upper mineral aggregate of the bed according to the specific gravity of the materials, wherein the specific gravity of the bottom mineral aggregate of the bed is greater than that of the upper mineral aggregate of the bed;
a second-stage jigging procedure, wherein the mineral aggregate at the bottom of the bed layer is conveyed into a second-stage jigging machine of the second-stage jigging procedure, and the mineral aggregate at the bottom of the bed layer is divided into bottom metal mixed material and upper mixed material according to the specific gravity of the material, wherein the specific gravity of the bottom metal mixed material is larger than that of the upper mixed material; wherein, bottom metal mixed material is carried to shaking table 1 and selects the copper powder, still has arranged magnetic separation device on the shaking table 1, and magnetic separation device divides and selects the iron powder.
Preferably, the method further comprises the following steps:
a step of manually getting up, in which a period of time t is set for each work of the jigger, the jigger is manually got up once, and precious metals are manually separated out while getting up; setting time t for each work of the two-stage jigger, manually getting up once, and manually sorting noble metals while getting up;
and a crushing and sorting process, wherein the left materials after manual sorting in the manual getting-up process are conveyed to a hammer copper beater in the crushing and sorting process for crushing, the crushed materials are conveyed to a table No. 2 for separating copper blocks, and a magnetic separation device is further arranged on the table No. 2 for separating iron powder.
Preferably, the method further comprises the following steps:
a primary grading procedure, namely feeding the materials fished out by the slag scooping machine from the residual slag mixed liquid in the table 1 and the table 2 and the slag mixed liquid discharged from the tail end discharge ports of the first-stage jigger and the second-stage jigger into a primary sieving machine for sieving treatment, and dividing the materials into the following three types of small stainless steel with the particle size of 20-80 mm; 10-20mm coarse slag mineral aggregate; fine-grained slag mineral aggregate in 0-10 mm;
and (3) carrying out vortex separation No. 1, conveying the 10-20mm coarse slag mineral aggregate into an vortex separator No. 1, separating aluminum, and conveying the rest tailings into a tailings bin.
Preferably, the method further comprises the following steps:
a secondary classification procedure, wherein 0-10mm medium-fine slag mineral aggregate is conveyed by a conveyor into a secondary classification screen, and the materials are divided into the following two types, namely 0-5mm medium-fine slag mineral aggregate and 5-10mm medium-fine slag mineral aggregate;
and (3) a step 2 of vortex separation, wherein 5-10mm medium-grain slag mineral aggregate enters a step 2 of an vortex current separator, aluminum is selected, and the rest tailings enter a tailings bin.
Preferably, the method further comprises the following steps:
a dehydration and screening process, namely conveying 0-5mm fine-particle-grade slag ore and water separated from a table No. 1 and a table No. 2 into a dehydration screen, and conveying dehydrated tailings into a tailings bin; the water from the dewatering screen enters a sewage tank, the water in the sewage tank enters a filter press to press mud, and the water from the filter press enters a clean water tank for recycling.
Preferably, the method further comprises the following steps:
and (3) an iron beating step, namely conveying the magnetic material blocks selected in the first magnetic separation step, the magnetic material blocks and the magnetic iron powder selected in the permanent magnet roller iron removal step and the magnetic iron powder selected in the first wet magnetic separation step into an iron beating machine of the iron beating step, and beating.
Preferably, the method further comprises the following steps:
a second magnetic separation step, wherein the second magnetic separation step comprises a No. 3 magnetic separator and a wet magnetic separator, and the iron material after the iron beating step is firstly conveyed to the No. 3 magnetic separator to separate iron blocks; and (3) conveying the materials subjected to magnetic separation by the No. 3 magnetic separator to a wet magnetic separator, and separating out magnetic iron powder.
Preferably, the method further comprises the following steps:
and a screening procedure of a trommel No. 2, namely, selecting iron blocks and magnetic iron powder in the procedure of the magnetic separation No. two, and inputting the iron blocks and the magnetic iron powder into the trommel of the screening procedure of the trommel No. 2, and screening the iron blocks and the magnetic iron powder into iron powder with the diameter of 0-6mm and iron blocks with the diameter of more than 6 mm.
The beneficial effects of the invention are as follows: the unburnt substances, large-grain-size mineral aggregates, medium-grain-size mineral aggregates, fine-grain-size mineral aggregates, large-block stainless steel, small-block stainless steel, iron blocks, iron powder, copper powder, aluminum, gold and silver noble metals and other materials in the garbage road slag components are separated, so that household garbage slag is effectively sorted, sundries are removed, metals with recovery values are sorted out, and comprehensive utilization is performed to achieve the maximization of the value.
Drawings
Fig. 1 is a process flow diagram of a household garbage slag separation process of the present invention.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
in a first embodiment, as shown in fig. 1, a household garbage slag separation process includes the following steps:
and a screening procedure of a rotary screen No. 1, namely conveying the slag after garbage incineration to the rotary screen for material classification, and dividing the slag into oversized particle-grade material blocks, medium-large particle-grade material blocks and small particle-grade material blocks. In the embodiment, the screening procedure of the roller screen No. 1 comprises a roller screen No. 1 and a roller screen No. 2, slag after garbage incineration is firstly conveyed to the roller screen No. 1 for screening, and is screened into oversized particle-grade material blocks and residual particle-grade material blocks, wherein the oversized particle-grade material blocks directly fall on the ground, and the oversized particle-grade material blocks refer to lump materials with the particle size of 300mm or more, and are usually unburned materials and large stainless steel; the rest grain grade material blocks are medium and large grain grade material blocks and small grain grade material blocks; and then, the rest granular material blocks enter a No. 2 rotary screen for screening, and the screening is performed to obtain medium-large granular material blocks and small granular material blocks, wherein the medium-large granular material blocks refer to material blocks with the particle size of 80-300mm, and the small granular material blocks refer to material blocks with the particle size of less than 80 mm.
And a first magnetic separation procedure, which comprises a No. 1 magnetic separator and a No. 2 magnetic separator. And conveying the medium-large-size material blocks to a magnetic separator of a No. 1 magnetic separator to select the magnetic material blocks, and conveying the small-size material blocks to a magnetic separator of a No. 2 magnetic separator to select the magnetic material blocks.
And (3) a manual sorting procedure, namely conveying the materials subjected to magnetic separation by the No. 1 magnetic separator to a manual sorting station for manual sorting, sorting unburnt matters and large stainless steel blocks, and placing the unburnt matters and the large stainless steel blocks in a buffer bin for temporary storage. Here, the
The unburned matters refer to slag blocks which are not completely combusted in the garbage incineration process, and the grain size of the slag blocks is more than 80mm; the large stainless steel is 80-300mm stainless steel.
A crushing step, namely conveying the rest materials after the separation in the manual separation step to a crusher, and crushing the rest materials into material blocks with the diameter of less than or equal to 50 mm; then, the material block is conveyed to a No. 2 rotary screen in the No. 1 rotary screen sieving procedure again for material classification, and the circulation is performed.
And (3) a permanent magnet roller deironing procedure, namely conveying the materials subjected to magnetic separation by the No. 2 magnetic separator into a permanent magnet roller in the permanent magnet roller deironing procedure, carrying out secondary magnetic separation, and separating out magnetic material blocks and part of magnetic iron powder.
And a slag beating process, wherein the materials subjected to magnetic separation in the permanent magnet roller iron removal process are conveyed into a slag beating machine in the slag beating process, and the materials are crushed with water, so that the particle size of the materials is less than or equal to 18 mm.
And a first wet magnetic separation step, namely conveying the crushed materials in the slag forming step to a wet magnetic separator in the first wet magnetic separation step, and carrying out magnetic separation again to obtain magnetic iron powder.
And (3) an iron beating step, namely conveying the magnetic material blocks selected in the first magnetic separation step, the magnetic material blocks and the magnetic iron powder selected in the permanent magnet roller iron removal step and the magnetic iron powder selected in the first wet magnetic separation step into an iron beating machine of the iron beating step, and beating.
A second magnetic separation step, wherein the second magnetic separation step comprises a No. 3 magnetic separator and a wet magnetic separator, and the iron material after the iron beating step is firstly conveyed to the No. 3 magnetic separator to separate iron blocks; and conveying the materials subjected to magnetic separation by the No. 3 magnetic separator to a wet magnetic separator in a second magnetic separation procedure, and separating out magnetic iron powder.
And a screening procedure of a trommel No. 2, namely, selecting iron blocks and magnetic iron powder in the procedure of the magnetic separation No. two, and inputting the iron blocks and the magnetic iron powder into the trommel of the screening procedure of the trommel No. 2, and screening the iron blocks and the magnetic iron powder into iron powder with the diameter of 0-6mm and iron blocks with the diameter of more than 6 mm.
And (3) a first-stage jigging procedure, namely conveying the materials subjected to magnetic separation in the first wet magnetic separation procedure into a first-stage jigger in the first-stage jigging procedure, and dividing the materials into a bottom mineral aggregate of the bed and an upper mineral aggregate of the bed according to the specific gravity of the materials, wherein the specific gravity of the bottom mineral aggregate of the bed is greater than that of the upper mineral aggregate of the bed. In the working of the first section of jigger, metal particles with heavier specific gravity sink to the bottom of the first section of jigger bed along with the falling water flow, and are discharged, namely, the mineral aggregate at the bottom of the bed is discharged from the bottom of the jigger bed; the mineral aggregate at the upper part of the bed layer is discharged along with water flowing through a section of discharge hole of the jigger. In the embodiment, the tailings after the magnetic separation in the second magnetic separation process are also conveyed into a first-stage jigger in the first-stage jigging process, and are separated according to the specific gravity of the materials.
And (3) a second-stage jigging process, conveying the mineral aggregate at the bottom of the bed layer into a second-stage jigging machine of the second-stage jigging process, and dividing the mineral aggregate at the bottom of the bed layer into bottom metal mixed material and upper mixed material according to the specific gravity of the material, wherein the specific gravity of the bottom metal mixed material is larger than that of the upper mixed material. The second-stage jigger is used for further fine separation of the mineral aggregate at the bottom of the bed, which is separated by the first-stage jigger, with heavier specific gravity is separated into the bottom metal mixed material with heavier specific gravity and the upper mixed material with lighter specific gravity, wherein the bottom metal mixed material with heavier specific gravity is discharged from the bottom of the bed of the second-stage jigger, and the upper mixed material is discharged along with water through a discharge hole of the second-stage jigger, so that the purity of the metal separated in the jigging procedure is improved. And conveying the bottom metal mixed materials to a shaking table No. 1 to obtain copper powder, wherein a magnetic separation device is further arranged on the shaking table No. 1, and the magnetic separation device is used for separating the iron powder. The magnetic separation device is a permanent magnet magnetic separator.
A manual getting-up process, wherein a period of time t is set for each work of the jigger (for example, a period of time 3 hours is set for each work of the jigger), the work is performed once, and precious metals (including but not limited to Jin Yingui metals) are manually separated out while the work is performed. The second stage jigs are manually brought up once per work set time t (for example, 3 hours per work set time of the second stage jigs), and precious metals (including but not limited to Jin Yingui metals) are manually sorted out while getting up. After the jigger is operated for a period of time, part of materials with larger specific gravity and larger particle size are easy to stay on the bed surface, and the materials need to be manually lifted to be cleaned regularly, and meanwhile, noble metals on the bed surface can be recovered.
And a crushing and sorting process, wherein the left materials after manual sorting in the manual getting-up process are conveyed to a hammer copper beater in the crushing and sorting process for crushing, and the crushed materials are conveyed to a table No. 2 for copper block sorting. And a magnetic separation device is also arranged on the shaker No. 2, and the magnetic separation device separates iron powder. The magnetic separation device is a permanent magnet magnetic separator.
A primary grading procedure, namely, a material obtained by fishing out the residual slag mixed liquid in the table 1 and the table 2 through a slag scooper and a slag mixed liquid discharged from a tail end discharge port of a primary jigger and a secondary jigger enter a primary screening machine of the primary grading procedure together for screening treatment (the slag mixed liquid discharged from the tail end discharge port of the primary jigger is mixed liquid of mineral materials and water at the upper part of a bed layer, and the slag mixed liquid discharged from the tail end discharge port of the secondary jigger is mixed liquid of the upper part of the mixed material and water), and the materials are divided into the following three types of small stainless steel with the particle size of 20-80 mm; 10-20mm coarse slag mineral aggregate; fine-grained slag mineral aggregate in 0-10 mm.
And (3) carrying out vortex separation No. 1, conveying the 10-20mm coarse slag mineral aggregate into an vortex separator No. 1, separating aluminum, and conveying the rest tailings into a tailings bin.
And a secondary classification procedure, wherein 0-10mm medium-fine slag mineral aggregate is conveyed into a secondary classification screen by a conveyor, and the materials are classified into the following two types, namely 0-5mm medium-fine slag mineral aggregate and 5-10mm medium-fine slag mineral aggregate.
And (3) a step 2 of vortex separation, wherein 5-10mm medium-grain slag mineral aggregate enters a step 2 of an vortex current separator, aluminum is selected, and the rest tailings enter a tailings bin.
A dehydration and screening process, namely conveying 0-5mm fine-particle-grade slag ores and water separated from a table 1 and a table 2 (the water separated from the table 1 and the table 2 refers to water discharged from a slag dragging machine by residual slag mixed liquid in the table 1 and the table 2), and conveying the dehydrated tailings into a dewatering screen, wherein the dewatered tailings enter a tailing bin; sewage from the dewatering screen enters a sewage tank, water in the sewage tank enters a filter press to press mud, and water from the filter press enters a clean water tank for recycling.
The household garbage slag sorting process of the embodiment meets the following requirements of sorting products from garbage road slag components:
1) Iron block size is 6-250mm, recovery rate is 100%, purity is 98%, grade is 96%, and water content is 4%;
2) Iron powder grade 0-6mm, recovery rate 85%, purity 92%, grade 35% and water content 16%;
3) Copper block size fraction 4-40mm, recovery rate 97%, purity 80%, grade 70% and water content 6%;
4) Copper powder grade 0-4mm, recovery rate 85%, purity 45%, grade 30% and water content 12%;
5) The grain size of the aluminum block is 6-40mm, the recovery rate is 97%, the purity is 95%, the grade is 95%, and the water content is 4%;
6) The grain size of the aluminum block is 3-6mm, the recovery rate is 85%, the purity is 90%, the grade is 92%, and the water content is 8%;
7) The size fraction of the large stainless steel is 75-350mm, the recovery rate is 100%, the purity is 96%, the grade is 96%,
the water content is 0%;
8) The grade of the small stainless steel particles is 20-80mm, the recovery rate is 95%, the purity is 90%, the grade is 90%, and the water content is 4%;
9) The grain size of the large-grain-level tailings is 6-20mm, the recovery rate is 100%, the purity is 98%, the grade is 95%, and the water content is 6%;
10 2-8mm of the middle-grade tailings, 100% of recovery rate, 96% of purity, 95% of grade and 10% of water content;
11 0-2mm of fine fraction tailings, 98% of recovery rate, 96% of purity, 92% of grade and 16% of water content.
12 The content of the tailing ferric oxide powder after garbage slag separation is not higher than 1 percent, and the content of light substances is not higher than 0.2 percent.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent transformation of the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The household garbage slag sorting process is characterized by comprising the following steps of:
a screening procedure of a rotary screen No. 1, namely conveying the waste incineration slag to the rotary screen for material classification, and dividing the slag into oversized particle-grade material blocks, medium-large particle-grade material blocks and small particle-grade material blocks;
a first magnetic separation procedure, which comprises a No. 1 magnetic separator and a No. 2 magnetic separator, wherein medium-large-size material blocks are conveyed to the No. 1 magnetic separator to select magnetic material blocks, and small-size material blocks are conveyed to the No. 2 magnetic separator to select magnetic material blocks;
a permanent magnet roller deironing procedure, wherein the materials after magnetic separation of the No. 2 magnetic separator are conveyed into a permanent magnet roller in the permanent magnet roller deironing procedure, and magnetic material blocks and part of magnetic iron powder are separated;
a slag beating step, namely conveying the material subjected to magnetic separation in the permanent magnet roller iron removal step into a slag beating machine in the slag beating step, and crushing the material with water to enable the grain size of the material to be less than or equal to 18 mm;
and a first wet magnetic separation step, namely conveying the crushed materials in the slag forming step to a wet magnetic separator in the first wet magnetic separation step, and separating out magnetic iron powder.
2. The household garbage slag sorting process according to claim 1, further comprising the steps of: further comprises:
a manual sorting procedure, namely conveying the materials subjected to magnetic separation by the No. 1 magnetic separator to a manual sorting station for manual sorting, sorting unburnt matters and large stainless steel blocks, and placing the unburnt matters and the large stainless steel blocks in a buffer bin for temporary storage;
a crushing step, namely conveying the rest materials after the separation in the manual separation step to a crusher, and crushing the rest materials into material blocks with the diameter of less than or equal to 50 mm; then, the material block is conveyed to a rotary screen in the screening procedure of the rotary screen No. 1 again for material classification.
3. The household garbage slag sorting process according to claim 1 or 2, further comprising the steps of:
and a first-stage jigging procedure, wherein the materials after magnetic separation in the first wet magnetic separation procedure are conveyed into a first-stage jigger in the first-stage jigging procedure, and the steps are as follows: the specific gravity of the material is large and small, and the material is divided into a bottom mineral aggregate of the bed and an upper mineral aggregate of the bed, wherein the specific gravity of the bottom mineral aggregate of the bed is larger than that of the upper mineral aggregate of the bed;
a second-stage jigging procedure, wherein the mineral aggregate at the bottom of the bed layer is conveyed into a second-stage jigging machine of the second-stage jigging procedure, and the mineral aggregate at the bottom of the bed layer is divided into bottom metal mixed material and upper mixed material according to the specific gravity of the material, wherein the specific gravity of the bottom metal mixed material is larger than that of the upper mixed material; wherein, bottom metal mixed material is carried to shaking table 1 and selects the copper powder, still has arranged magnetic separation device on the shaking table 1, and magnetic separation device divides and selects the iron powder.
4. A household garbage slag sorting process according to claim 3, further comprising the steps of:
a step of manually getting up, in which a period of time t is set for each work of the jigger, the jigger is manually got up once, and precious metals are manually separated out while getting up; setting time t for each work of the two-stage jigger, manually getting up once, and manually sorting noble metals while getting up;
and a crushing and sorting process, wherein the left materials after manual sorting in the manual getting-up process are conveyed to a hammer copper beater in the crushing and sorting process for crushing, the crushed materials are conveyed to a table No. 2 for separating copper blocks, and a magnetic separation device is further arranged on the table No. 2 for separating iron powder.
5. The household garbage slag sorting process according to claim 4, further comprising the steps of:
a primary grading procedure, namely feeding the materials fished out by the slag scooping machine from the residual slag mixed liquid in the table 1 and the table 2 and the slag mixed liquid discharged from the tail end discharge ports of the first-stage jigger and the second-stage jigger into a primary sieving machine for sieving treatment, and dividing the materials into the following three types of small stainless steel with the particle size of 20-80 mm; 10-20mm coarse slag mineral aggregate; fine-grained slag mineral aggregate in 0-10 mm;
and (3) carrying out vortex separation No. 1, conveying the 10-20mm coarse slag mineral aggregate into an vortex separator No. 1, separating aluminum, and conveying the rest tailings into a tailings bin.
6. The household garbage slag sorting process according to claim 5, further comprising the steps of:
a secondary classification procedure, wherein 0-10mm medium-fine slag mineral aggregate is conveyed by a conveyor into a secondary classification screen, and the materials are divided into the following two types, namely 0-5mm medium-fine slag mineral aggregate and 5-10mm medium-fine slag mineral aggregate;
and (3) a step 2 of vortex separation, wherein 5-10mm medium-grain slag mineral aggregate enters a step 2 of an vortex current separator, aluminum is selected, and the rest tailings enter a tailings bin.
7. The household garbage slag sorting process according to claim 6, further comprising the steps of:
a dehydration and screening process, namely conveying 0-5mm fine-particle-grade slag ores and water separated in a table No. 1 and a table No. 2 into a dehydration screen, and conveying dehydrated tailings into a tailings bin; the water from the dewatering screen enters a sewage tank, the water in the sewage tank enters a filter press to press mud, and the water from the filter press enters a clean water tank for recycling.
8. The household garbage slag sorting process according to claim 1 or 2, further comprising the steps of:
and (3) an iron beating step, namely conveying the magnetic material blocks selected in the first magnetic separation step, the magnetic material blocks and the magnetic iron powder selected in the permanent magnet roller iron removal step and the magnetic iron powder selected in the first wet magnetic separation step into an iron beating machine of the iron beating step, and beating.
9. The household garbage slag sorting process according to claim 8, further comprising the steps of:
a second magnetic separation step, wherein the second magnetic separation step comprises a No. 3 magnetic separator and a wet magnetic separator, and the iron material after the iron beating step is firstly conveyed to the No. 3 magnetic separator to separate iron blocks; and (3) conveying the materials subjected to magnetic separation by the No. 3 magnetic separator to a wet magnetic separator, and separating out magnetic iron powder.
10. The household garbage slag sorting process according to claim 9, further comprising the steps of:
and a screening procedure of a trommel No. 2, namely, selecting iron blocks and magnetic iron powder in the procedure of the magnetic separation No. two, and inputting the iron blocks and the magnetic iron powder into the trommel of the screening procedure of the trommel No. 2, and screening the iron blocks and the magnetic iron powder into iron powder with the diameter of 0-6mm and iron blocks with the diameter of more than 6 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117696215A (en) * | 2024-02-05 | 2024-03-15 | 天津高能时代再生资源利用有限公司 | Sorting and recycling system for garbage incinerator slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117696215A (en) * | 2024-02-05 | 2024-03-15 | 天津高能时代再生资源利用有限公司 | Sorting and recycling system for garbage incinerator slag |
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