CN115710094A - Full-quantitative recycling method for bottom slag of garbage incinerator - Google Patents
Full-quantitative recycling method for bottom slag of garbage incinerator Download PDFInfo
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- CN115710094A CN115710094A CN202211528552.0A CN202211528552A CN115710094A CN 115710094 A CN115710094 A CN 115710094A CN 202211528552 A CN202211528552 A CN 202211528552A CN 115710094 A CN115710094 A CN 115710094A
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- 239000002893 slag Substances 0.000 title claims abstract description 160
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000004064 recycling Methods 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 156
- 239000002184 metal Substances 0.000 claims abstract description 131
- 229910052751 metal Inorganic materials 0.000 claims abstract description 131
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 109
- 150000002739 metals Chemical class 0.000 claims abstract description 95
- 239000004568 cement Substances 0.000 claims abstract description 58
- 238000000498 ball milling Methods 0.000 claims abstract description 40
- 235000019738 Limestone Nutrition 0.000 claims abstract description 38
- 239000006028 limestone Substances 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims abstract description 38
- 239000010440 gypsum Substances 0.000 claims abstract description 37
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 37
- 238000007885 magnetic separation Methods 0.000 claims abstract description 37
- 230000004913 activation Effects 0.000 claims abstract description 35
- 239000011449 brick Substances 0.000 claims abstract description 35
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 238000013329 compounding Methods 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 122
- 229910052742 iron Inorganic materials 0.000 claims description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000006148 magnetic separator Substances 0.000 claims description 31
- 238000009837 dry grinding Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 238000013139 quantization Methods 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims 1
- 239000004566 building material Substances 0.000 abstract description 6
- 239000000284 extract Substances 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 238000005191 phase separation Methods 0.000 description 29
- 238000001514 detection method Methods 0.000 description 21
- 239000011398 Portland cement Substances 0.000 description 8
- 239000003469 silicate cement Substances 0.000 description 6
- 239000004927 clay Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
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- 229920003023 plastic Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
- 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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a full-quantitative recycling method for bottom slag of a garbage incinerator, and belongs to the technical field of solid waste resource utilization. The invention extracts valuable metals from the bottom slag of the garbage incinerator through magnetic separation and vortex separation treatment, realizes the separation of a metal phase and the slag phase, recycles the metal phase, and utilizes the slag phase in building materials with high value. And screening the slag phase to obtain fine aggregates and coarse aggregates, performing ball milling activation on the fine aggregates, then compounding cement clinker, limestone and gypsum, and uniformly mixing to obtain an LC3 low-carbon cementing material, wherein the coarse aggregates and the LC3 low-carbon cementing material are used for high-performance permeable bricks, heat-insulating blocks and concrete in a high-value manner. The invention realizes the high-value utilization of all components of the bottom slag of the garbage incinerator and has the advantages of short flow, no pollution and easy industrialization.
Description
Technical Field
The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a full-quantitative recycling method for bottom slag of a garbage incinerator.
Background
The bottom slag of the garbage incinerator is the main residue generated by garbage incineration, the percentage of the bottom slag is as high as 80% -90%, the bottom slag mainly comprises 60% -62% of slag, 10% -12% of ceramic, 7% -9% of masonry, 4% -6% of metal products and 2% -5% of glass, and the bottom slag also contains a small amount of organic matters such as plastics, paper and wood. After a series of pretreatment processes such as iron removal, nonferrous metal removal, crushing, screening, washing and the like are carried out on the bottom slag of the incinerator, the granules are characterized by large particle size (0.60 to 4.75 mm) and low fine powder content (granules with the particle size of less than 0.075 mm)<5%) of SiO as the main chemical component 2 、Al 2 O 3 And the component characteristics of the building material are beneficial to improving the mechanical properties of part of building materials, so that the building material has the resource utilization potential in the building material field. In the building material field, the cement industry has promoted economic development and consumed a large amount of resources and energy.
LC3 low-carbon cementing material, namely limestone calcined clay cementing material, zijuan in published paper of application prospect of novel low-carbon cement LC3 indicates that performance of the cementing material is enhanced and CO can be reduced by 30 percent through pozzolanic reaction and interaction of limestone-clay 2 15 to 20 percent of energy consumption in emission and cement production. The LC3 low-carbon cementing material provides a feasible solution for the large-scale production of low-carbon cement, has a prospect and is stronger than common portland cementThe low-clinker cement with a certain degree of development also provides a method for a low-heat and low-cost cementing material for a large-volume concrete member, and creates a more economical and feasible material for a development area.
The harmless disposal of the bottom slag of the garbage incinerator has the problems of low efficiency, high cost, high energy consumption, long process flow, poor operability and the like. Therefore, the harmless and high-valued treatment method for the bottom slag of the waste incinerator, which is environment-friendly, simple in process, strong in operability and high in additional value, is urgently needed to be developed.
Disclosure of Invention
The technical problem to be solved is as follows: aiming at the technical problems, the invention provides a full-quantization recycling method of bottom slag of a garbage incinerator, which can extract valuable metals, can utilize the bottom slag of the garbage incinerator to LC3 low-carbon cementing materials, permeable bricks, heat-insulating building blocks and concrete, and has the advantages of simple process, low cost and strong operability.
The technical scheme is as follows: a full-scale recycling method of bottom slag of a garbage incinerator is disclosed, wherein the bottom slag of the garbage incinerator is subjected to magnetic separation and vortex separation treatment to extract valuable metals in the bottom slag of the garbage incinerator, so that the separation of a metal phase and the slag phase is realized; and screening the slag phase to obtain fine aggregates and coarse aggregates, performing ball milling activation on the fine aggregates, compounding cement clinker, limestone and gypsum to obtain an LC3 low-carbon cementing material, and compounding the coarse aggregates and the LC3 low-carbon cementing material to obtain the water permeable brick, the heat insulation block or the concrete.
Preferably, the method specifically comprises the following steps:
step 1, magnetic separation and eddy current separation: sorting valuable metals in the bottom slag of the garbage incinerator;
and step 2, screening: screening fine aggregates S1 with the particle size of less than or equal to 0.16mm, coarse aggregates S2 with the particle size of less than 2mm and coarse aggregates S3 with the particle size of more than or equal to 2mm, wherein the particle size of 0.16mm is less than or equal to 2 mm;
step 3, ball-milling the fine aggregate S1, and compounding the fine aggregate with cement clinker, limestone and gypsum to obtain an LC3 low-carbon cementing material;
step 4, compounding the LC3 low-carbon cementing material with the coarse aggregate S2 to obtain concrete or a heat-insulating building block; and compounding the LC3 low-carbon cementing material with coarse aggregate S3 to obtain the water permeable brick.
Preferably, the mass ratio of the fine aggregate S1 subjected to ball milling in the step 3 to the cement clinker, limestone and gypsum is (20 to 40): (40 to 60): (10 to 20): (5 to 15).
Preferably, a magnetic separator is adopted for magnetic separation in the step 1, and the removal rate of the metallic iron is more than or equal to 95%.
Preferably, the eddy current sorting is carried out by adopting an eddy current sorting machine in the step 1, and the removal rate of the nonferrous metals is more than or equal to 95%.
Preferably, a ball mill is adopted in the step 3 for ball milling activation, and the particle size after ball milling is less than or equal to 0.04mm.
Preferably, dry grinding is adopted in the step 3 for 15min to 120min, and the ball-to-material ratio is 1:1 to 3:1.
The invention has the beneficial technical effects that:
(1) The method realizes the high-value utilization of all components of the bottom slag of the garbage incinerator, has the advantages of short flow, no pollution and easy industrialization, and realizes the resource and high-value utilization of the bottom slag of the garbage incinerator.
(2) Valuable metals in the bottom slag of the garbage incinerator are extracted through magnetic separation and vortex separation, and the additional value of the bottom slag of the garbage incinerator is increased.
(3) The components of the bottom slag of the garbage incinerator are similar to those of calcined clay, and the calcined clay contains Al with gelling property 2 O 3 And SiO 2 And the physical activation is realized by ball milling to excite the gelling activity of the bottom slag of the garbage incinerator. The bottom slag of the garbage incinerator is cooperated with cement clinker, limestone and gypsum to generate hydration, so that the LC3 low-carbon cementing material has excellent mechanical property and durability.
(4) The LC3 low-carbon cementing material can reduce 30 percent of CO 2 Carbon emission and energy consumption of 15 to 20 percent in cement production, and has the advantages of sustainability, high performance and low cost.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Example 1
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 95%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 100 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating a slag phase into fine aggregates S1 (the grain size is less than or equal to 0.16 mm), coarse aggregates S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregates S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregates S1 are subjected to dry grinding for 15min by adopting a ball mill, the ball-to-material ratio is 1:1, the ball-to-material ratio is 0.04mm, 30 wt after ball-milling activation treatment is uniformly mixed with 40wt.% cement clinker, 20wt.% limestone and 10wt.% gypsum to obtain an LC3 low-carbon cementing material, and the flexural strength is respectively 3.5MPa and 6.5MPa in 3 days and 28 days and the compressive strength is respectively 17MPa and 42.5MPa according to GB 175-2007 universal silicate cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 2
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 96%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 95.5 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 19min by a ball mill, the ball-to-material ratio is 1:2, the ball-milling activation treatment is carried out, 31 wt% of fine aggregate is uniformly mixed with 41 wt% of cement clinker, 19 wt% of limestone and 9 wt% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength is respectively 3.7MPa and 6.6MPa in 3 days and 28 days and the compressive strength is respectively 17.3MPa and 42.5MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value application to concrete, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value application to water permeable bricks.
Embodiment 3
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 97%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 95.8 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating a slag phase into fine aggregates S1 (the grain size is less than or equal to 0.16 mm), coarse aggregates S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregates S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregates S1 are subjected to dry grinding for 23min by a ball mill, the ball-to-material ratio is 1:3, the ball-to-material ratio is 0.038mm, 32 wt after ball-milling activation treatment is uniformly mixed with 42wt.% cement clinker, 18wt.% limestone and 8wt.% gypsum to obtain the LC3 low-carbon cementing material, and the fracture strengths of 3 days and 28 days are respectively 3.9MPa and 6.7MPa and the compression strengths are respectively 17.6MPa and 42.8MPa according to GB 175-2007 universal silicate cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value application to concrete, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value application to water permeable bricks.
Example 4
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 98%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 96.1 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 27min by a ball mill, the ball-to-material ratio is 1:1, the ball-milling activation treatment is carried out, 33 wt% of fine aggregate, 43 wt% of cement clinker, 17 wt% of limestone and 7 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, and the flexural strength in 3 days and 28 days is respectively 4.1MPa and 6.8MPa, and the compressive strength is respectively 17.9MPa and 43.1MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 5
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 99%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 96.4 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain size is less than or equal to 0.16 mm), coarse aggregate S2 (the grain size is less than or equal to 2 mm) and coarse aggregate S3 (the grain size is more than or equal to 2 mm) by adopting a vibrating screen, wherein the obtained fine aggregate S1 is dry-ground for 31min by adopting a ball mill, the ball-to-material ratio is 1:2, the ball-to-material ratio is ball-milled to 0.036mm, 34 wt after ball-milling activation treatment is uniformly mixed with 44wt.% of cement clinker, 16wt.% of limestone and 6wt.% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength is respectively 4.3MPa and 6.9Pa after 3 days and 28 days according to GB 175-2007 universal cement standard, and the compressive strength is respectively 18.2MPa and 43.4MPa. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 6
A full-quantization recycling method of bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 100%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 96.7 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain size is less than or equal to 0.16 mm), coarse aggregate S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 35min by a ball mill, the ball-to-material ratio is 1:3, the ball-to-material ratio is ball-milled to 0.035mm, 35 wt% of fine aggregate subjected to ball-milling activation treatment is uniformly mixed with 45 wt% of cement clinker, 15 wt% of limestone and 5 wt% of gypsum to obtain the LC3 low-carbon cementing material, and the breaking strength in 3 days and 28 days is respectively 4.5MPa and 7MPa, and the compressive strength is respectively 18.5MPa and 43.7MPa according to GB 175-2007 universal portland cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building blocks, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable bricks.
Example 7
A full-quantization recycling method of bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 95.5%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 97 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-ground for 39min by a ball mill, the ball-to-material ratio is 1:1, the ball-to-material ratio is 0.034mm, 26wt.% of fine aggregate after ball-milling activation treatment is uniformly mixed with 46wt.% of cement clinker, 14wt.% of limestone and 14wt.% of gypsum to obtain the LC3 low-carbon cementing material, the rupture strength in 3 days and 28 days is respectively 4.7MPa and 7.1MPa, and the compressive strength is respectively 18.8MPa and 44MPa according to GB 175-2007 general portland cement standard. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building blocks, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable bricks.
Example 8
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 95.8%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 97.3 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain size is less than or equal to 0.16 mm), coarse aggregate S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 43min by a ball mill, the ball-to-material ratio is 1:2, the ball-to-material ratio is ball-milled to 0.033mm, 27 wt after ball-milling activation treatment is uniformly mixed with 47wt.% of cement clinker, 13wt.% of limestone and 13wt.% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength is respectively 4.9MPa and 7.2MPa in 3 days and 28 days and the compressive strength is respectively 19.1MPa and 44.3MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 9
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 96.1%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 97.6 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 47min by a ball mill, the ball-to-material ratio is 1:3, the ball-to-material ratio is ball-milled to 0.032mm, 28 wt after ball-milling activation treatment is uniformly mixed with 48wt.% of cement clinker, 12wt.% of limestone and 12wt.% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength is 5.1MPa and 7.3MPa respectively after 3 days and 28 days according to GB 175-2007 universal cement standard, and the compressive strength is 19.4MPa and 44.6MPa respectively. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Embodiment 10
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 96.4%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 97.9 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 51min by a ball mill, the ball-to-material ratio is 1:1, the ball-milling activation treatment is carried out, 29 wt% of fine aggregate, 49 wt% of cement clinker, 11 wt% of limestone and 11 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, and the flexural strength in 3 days and 28 days is respectively 5.3MPa and 7.4MPa, and the compressive strength is respectively 19.7MPa and 44.9MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building blocks, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable bricks.
Example 11
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 96.7%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 98.2 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 55min by a ball mill, the ball-to-material ratio is 1:2, the fine aggregate is ball-milled to the grain diameter of 0.03mm, 30 wt subjected to ball-milling activation treatment is uniformly mixed with 50wt.% of cement clinker, 10wt.% of limestone and 10wt.% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength is 5.5MPa and 7.5MPa respectively after 3 days and 28 days according to GB 175-2007 universal silicate cement standard, and the compressive strength is 20MPa and 45.2MPa respectively. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building blocks, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable bricks.
Example 12
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 97%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 98.5 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating a slag phase into fine aggregates S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregates S2 (the grain diameter is less than 2 mm) and coarse aggregates S3 (the grain diameter is more than or equal to 2 mm) by adopting a vibrating screen, wherein the obtained fine aggregates S1 are dry-ground for 59min by adopting a ball mill, the ball-to-material ratio is 1:3, the ball-to-material ratio is ball-milled to 0.02 9mm, 31 wt% of fine aggregates after ball-milling activation treatment are uniformly mixed with 51 wt% of cement clinker, 10 wt% of limestone and 8 wt% of gypsum to obtain the LC3 low-carbon cementing material, the flexural strength in 3 days and 28 days is respectively 5.7MPa and 7.6MPa, and the compressive strength is respectively 20.3MPa and 45.5MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 13
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 97.3%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 98.8 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-ground for 63min by a ball mill, the ball-to-material ratio is 1:1, the ball-to-material ratio is ball-milled to 0.028mm, 32 wt subjected to ball-milling activation treatment is uniformly mixed with 46wt.% of cement clinker, 15wt.% of limestone and 7wt.% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength is 5.9MPa and 7.7MPa respectively after 3 days and 28 days according to GB 175-2007 universal cement standard, and the compressive strength is 20.6MPa and 45.8MPa respectively. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Embodiment 14
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 97.6%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 99.1 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating a slag phase into fine aggregates S1 (the grain size is less than or equal to 0.16 mm), coarse aggregates S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregates S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregates S1 are subjected to dry grinding for 67min by a ball mill, the ball-to-material ratio is 1:2, the ball-to-material ratio is 0.027mm, 33 wt after ball-milling activation treatment is uniformly mixed with 41wt.% cement clinker, 14wt.% limestone and 12wt.% gypsum to obtain the LC3 low-carbon cementing material, and the fracture strengths of the low-carbon cementing material after 3 days and 28 days are respectively 6.1MPa and 7.8MPa, and the compression strengths are respectively 20.9MPa and 50MPa according to GB 175-2007 universal silicate cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 15
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 97.9%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 99.4 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-ground for 71min by a ball mill, the ball-to-material ratio is 1:3, the ball-mill activation treatment is carried out, 34 wt% of fine aggregate, 43 wt% of cement clinker, 13 wt% of limestone and 10 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, and the breaking strength in 3 days and 28 days is respectively 6.3MPa and 7.9MPa, and the compressive strength is respectively 21.2MPa and 51MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building blocks, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable bricks.
Example 16
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 98.2%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 95 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 75min by a ball mill, the ball-to-material ratio is 1:1, the ball-milling activation treatment is carried out, 35 wt% of fine aggregate, 41 wt% of cement clinker, 12 wt% of limestone and 12 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, the bending strength in 3 days and 28 days is respectively 6.5MPa and 8MPa, and the compressive strength is respectively 23MPa and 52MPa according to GB 175-2007 universal portland cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 17
A full-quantization recycling method of bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 98.5%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 96 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain size is less than or equal to 0.16 mm), coarse aggregate S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 79min by a ball mill, the ball-to-material ratio is 1:2, the ball-milling activation treatment is carried out, 36 wt% of fine aggregate, 45 wt% of cement clinker, 11 wt% of limestone and 8 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, the flexural strength in 3 days and 28 days is respectively 6.70MPa and 8.1MPa, and the compressive strength is respectively 24.80MPa and 53MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 18
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 98.8%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 97 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating a slag phase into fine aggregates S1 (the grain size is less than or equal to 0.16 mm), coarse aggregates S2 (the grain size is less than 2 mm) and coarse aggregates S3 (the grain size is more than or equal to 2 mm) by adopting a vibrating screen, wherein the obtained fine aggregates S1 are subjected to dry grinding for 83min by adopting a ball mill, the ball-to-material ratio is 1:3, the ball-to-material ratio is 0.023mm, 37 wt after ball-milling activation treatment is uniformly mixed with 46wt.% cement clinker, 10wt.% limestone and 7wt.% gypsum to obtain the LC3 low-carbon cementing material, and the fracture strengths of the low-carbon cementing material after 3 days and 28 days are respectively 6.9MPa and 8.2MPa and the compressive strengths are respectively 26.6MPa and 54MPa according to GB 175-2007 universal portland cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 19
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 99.1%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 98 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain size is less than or equal to 0.16 mm), coarse aggregate S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 87min by a ball mill, the ball-to-material ratio is 1:1, the ball-milling activation treatment is carried out, 20 wt% of fine aggregate is uniformly mixed with 60 wt% of cement clinker, 13 wt% of limestone and 7 wt% of gypsum to obtain the LC3 low-carbon cementing material, the flexural strength in 3 days and 28 days is respectively 7.1MPa and 8.3MPa, and the compressive strength is respectively 28.4MPa and 55MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Embodiment 20
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 99.4%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 99 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-ground for 91min by a ball mill, the ball-to-material ratio is 1:2, ball-milling activation treatment is carried out, the fine aggregate of 3239 zxft 3262, cement clinker of 40wt.%, limestone of 15wt.% and gypsum of 6wt.% are uniformly mixed, and then the LC3 low-carbon cementing material is obtained, and the flexural strength is 7.3MPa and 8.4MPa in 3 days and 28 days and the compressive strength is 30.2MPa and 56MPa respectively according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 21
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 99.7%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 100 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-ground for 95min by a ball mill, the ball-to-material ratio is 1:3, ball-milled to 0.02mm, 33 wt subjected to ball-milling activation treatment is uniformly mixed with 43wt.% of cement clinker, 14wt.% of limestone and 10wt.% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength in 3 days and 28 days is respectively 7.5MPa and 8.5MPa, and the compressive strength is respectively 32MPa and 57MPa according to GB 175-2007 universal portland cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building blocks, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable bricks.
Embodiment 22
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 100%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 95.5 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregates S1 (the grain size is less than or equal to 0.16 mm), coarse aggregates S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregates S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregates S1 are dry-milled for 99min by a ball mill, the ball-to-material ratio is 1:1, the ball-milling activation treatment is carried out, 22 wt% of fine aggregates are uniformly mixed with 50 wt% of cement clinker, 13 wt% of limestone and 15 wt% of gypsum to obtain the LC3 low-carbon cementing material, and the flexural strength in 3 days and 28 days is respectively 7.7MPa and 8.6MPa, and the compressive strength is respectively 33.8MPa and 58MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 23
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 98%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 95.8 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregates S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregates S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregates S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregates S1 are dry-milled for 103min by a ball mill, the ball-to-material ratio is 1:2, the ball-milling activation treatment is carried out on 24 wt% of fine aggregates, 51 wt% of cement clinker, 12 wt% of limestone and 13 wt% of gypsum, and the LC3 low-carbon cementing material is obtained after uniform mixing, and the flexural strength in 3 days and 28 days is respectively 7.9MPa and 8.7MPa according to GB 175-2007 universal portland cement standard, and the compressive strength is respectively 35.6MPa and 59MPa. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Embodiment 24
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 99%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 96.1 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm) by adopting a vibrating screen, wherein the obtained fine aggregate S1 is subjected to dry grinding for 107min by adopting a ball mill, the ball-to-material ratio is 1:3, the ball-to-material ratio is ball-milled to 0.017mm, 25 wt% of fine aggregate subjected to ball-milling activation treatment is uniformly mixed with 52 wt% of cement clinker, 11 wt% of limestone and 12 wt% of gypsum to obtain the LC3 low-carbon cementing material, the flexural strength in 3 days and 28 days is respectively 8.1MPa and 8.80MPa according to GB 175-2007 universal portland cement standard, and the compressive strength is respectively 37.4MPa and 60MPa. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building blocks, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable bricks.
Example 25
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 100%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 98.2 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 111min by a ball mill, the ball-to-material ratio is 1:1, the ball-milling activation treatment is carried out, 26 wt% of fine aggregate, 53 wt% of cement clinker, 10 wt% of limestone and 11 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, the breaking strength in 3 days and 28 days is 8.3MPa and 8.9MPa respectively, and the compressive strength is 39.2MPa and 61MPa respectively according to GB 175-2007 universal portland cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value application in concrete, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value application in water permeable bricks.
Example 26
A full-quantitative recycling method for bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 95.5%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 98.5 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain diameter is less than or equal to 0.16 mm), coarse aggregate S2 (the grain diameter is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain diameter is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 115min by a ball mill, the ball-to-material ratio is 1:2, the ball-milling activation treatment is carried out, 27 wt% of fine aggregate, 47 wt% of cement clinker, 20 wt% of limestone and 6 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, the flexural strength in 3 days and 28 days is respectively 4.3MPa and 7.7MPa, and the compressive strength is respectively 18.2MPa and 45.2MPa according to GB 175-2007 universal cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Example 27
A full-quantization recycling method of bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 95.8%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 98.8 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating slag phase into fine aggregate S1 (the grain size is less than or equal to 0.16 mm), coarse aggregate S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregate S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregate S1 is dry-milled for 119min by using a ball mill, the ball-to-material ratio is 1:3, the ball-milling activation treatment is carried out, 28 wt% of fine aggregate, 48 wt% of cement clinker, 19 wt% of limestone and 5 wt% of gypsum are uniformly mixed to obtain the LC3 low-carbon cementing material, and the flexural strength in 3 days and 28 days is respectively 4.5MPa and 7.8MPa according to the GB 175-2007 universal cement standard, and the compressive strength is respectively 18.5MPa and 45.5MPa. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value application to concrete, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value application to water permeable bricks.
Example 28
A full-quantization recycling method of bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 96.1%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 99.1 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating a slag phase into fine aggregates S1 (the grain size is less than or equal to 0.16 mm), coarse aggregates S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregates S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregates S1 are subjected to dry grinding for 120min by adopting a ball mill, the ball-to-material ratio is 1:1, the ball-to-material ratio is 0.032mm, 29 wt after ball-milling activation treatment is uniformly mixed with 49wt.% cement clinker, 11wt.% limestone and 11wt.% gypsum to obtain the LC3 low-carbon cementing material, and the breaking strengths of 3 days and 28 days are respectively 4.7MPa and 7.9MPa, and the compressive strengths are respectively 18.8MPa and 45.8MPa according to GB 175-2007 universal silicate cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value application in concrete, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value application in water permeable bricks.
Example 29
A full-quantization recycling method of bottom slag of a garbage incinerator comprises the following steps: firstly, magnetically separating metallic iron in the bottom slag of the garbage incinerator by using a magnetic separator, wherein the removal rate of the metallic iron is 96.4%; the nonferrous metals in the bottom slag of the garbage incinerator are separated by adopting an eddy current separator, the removal rate of the nonferrous metals is 99.4 percent, and the valuable metals obtained by magnetic separation and eddy current separation can be recycled. After metal phase separation, separating a slag phase into fine aggregates S1 (the grain size is less than or equal to 0.16 mm), coarse aggregates S2 (the grain size is less than 2mm < 0.16 mm) and coarse aggregates S3 (the grain size is more than or equal to 2 mm), wherein the obtained fine aggregates S1 are subjected to dry grinding for 15min by adopting a ball mill, the ball-to-material ratio is 1:2, the ball-to-material ratio is 0.031mm, 40wt after ball-milling activation treatment is uniformly mixed with 40wt.% cement clinker, 10wt.% limestone and 10wt.% gypsum to obtain the LC3 low-carbon cementing material, and the bending strengths of the material in 3 days and 28 days are respectively 4.9MPa and 8MPa, and the compression strengths of the material are respectively 19.1MPa and 50MPa according to GB 175-2007 universal silicate cement standard detection. The obtained LC3 low-carbon cementing material and the coarse aggregate S2 are compounded and used for high value in the heat-insulating building block, and the obtained LC3 low-carbon cementing material and the coarse aggregate S3 are compounded and used for high value in the water permeable brick.
Claims (7)
1. A full-quantitative recycling method of bottom slag of a garbage incinerator is characterized in that the bottom slag of the garbage incinerator is subjected to magnetic separation and vortex sorting treatment to extract valuable metals in the bottom slag of the garbage incinerator, so that the separation of a metal phase and the slag phase is realized; and screening the slag phase to obtain fine aggregates and coarse aggregates, performing ball milling activation on the fine aggregates, and then compounding cement clinker, limestone and gypsum to obtain an LC3 low-carbon cementing material, and compounding the coarse aggregates and the LC3 low-carbon cementing material to obtain the water permeable brick, the heat-insulating block or the concrete.
2. The method for recycling the bottom slag of the garbage incinerator in a full-scale manner according to the claim 1, is characterized by comprising the following steps:
step 1, magnetic separation and eddy current separation: sorting valuable metals in the bottom slag of the garbage incinerator;
and step 2, screening: sieving fine aggregates S1 with the grain size of less than or equal to 0.16mm, coarse aggregates S2 with the grain size of less than 2mm and coarse aggregates S3 with the grain size of more than or equal to 2mm, wherein the grain size of 0.16mm is less than that of 2 mm;
step 3, ball-milling the fine aggregate S1, and compounding the fine aggregate with cement clinker, limestone and gypsum to obtain an LC3 low-carbon cementing material;
step 4, compounding the LC3 low-carbon cementing material with the coarse aggregate S2 to obtain concrete or a heat-insulating building block; and compounding the LC3 low-carbon cementing material with coarse aggregate S3 to obtain the water permeable brick.
3. The method for fully recycling the bottom slag of the garbage incinerator according to claim 2, wherein the mass ratio of the fine aggregate S1 subjected to ball milling in the step 3 to cement clinker, limestone and gypsum is (20 to 40): (40 to 60): (10 to 20): (5 to 15).
4. The method for fully recycling the bottom slag of the garbage incinerator according to claim 2, characterized in that a magnetic separator is used for magnetic separation in the step 1, and the removal rate of metallic iron is not less than 95%.
5. The method for full-quantization recycling of bottom slag of the garbage incinerator according to claim 2, characterized in that in step 1, a vortex separator is used for vortex separation, and the nonferrous metal removal rate is not less than 95%.
6. The method for fully recycling bottom slag of a garbage incinerator according to claim 2, characterized in that ball milling activation is performed in step 3 by using a ball mill, and the particle size after ball milling is less than or equal to 0.04mm.
7. The method for fully recycling bottom slag of the garbage incinerator according to claim 2, characterized in that dry grinding is adopted for 15-120 min in the step 3, and the ball-to-feed ratio is 1:1-3:1.
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