CN113522518A - Water quenching kiln slag treatment method - Google Patents
Water quenching kiln slag treatment method Download PDFInfo
- Publication number
- CN113522518A CN113522518A CN202110745033.9A CN202110745033A CN113522518A CN 113522518 A CN113522518 A CN 113522518A CN 202110745033 A CN202110745033 A CN 202110745033A CN 113522518 A CN113522518 A CN 113522518A
- Authority
- CN
- China
- Prior art keywords
- kiln slag
- water quenching
- coal
- water
- residual materials
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000002893 slag Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010791 quenching Methods 0.000 title claims abstract description 16
- 230000000171 quenching effect Effects 0.000 title claims abstract description 16
- 239000003245 coal Substances 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 26
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000007885 magnetic separation Methods 0.000 claims abstract description 16
- 239000011701 zinc Substances 0.000 claims abstract description 16
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000006148 magnetic separator Substances 0.000 claims abstract description 12
- 241001584775 Tunga penetrans Species 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 7
- 239000002817 coal dust Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 7
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 239000013014 purified material Substances 0.000 abstract description 2
- 238000004080 punching Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- 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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a water quenching kiln slag treatment method, which comprises the following steps: carrying out magnetic separation on the screened kiln slag for multiple times to obtain primary separated coal and residual materials; in order to further obtain coal, the residual materials are put into a jigger to be sorted to obtain secondary separated coal and secondary residual materials; and separating the secondary residual materials into fine iron powder by a spiral dehydrator, a ball mill and a magnetic separator in sequence, and filtering the residual tailings in a filter press to obtain zinc-containing tailings. The materials separated from the kiln slag are physically screened by taking water as a medium, so that higher purification is realized, the influence of impurities on purified materials is reduced, the process difficulty is reduced, and the process effect is improved.
Description
Technical Field
The invention relates to a waste treatment method, in particular to a water quenching kiln slag treatment method.
Background
The kiln slag is dust slag generated in kiln burning and contains certain content of coal, iron, zinc and other elements, the existing treatment process is mainly realized by a physical ball milling mode when coal dust is recovered, but the recovery rate is low, and meanwhile, the coal dust contains more impurities and needs to be purified again, so that the coal dust cannot be directly reused, and the process cost is high; in addition, the zinc is mainly extracted in a magnetic separation mode during the recovery of the zinc, the quality of the extracted zinc is not high, and the zinc contains various impurities. A treatment process is urgently needed to improve the recovery rate and the purity of the coal dust and the zinc.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a water quenching kiln slag treatment method, which realizes higher purification by screening materials separated from kiln slag by taking water as a medium, reduces the influence of impurities on purified materials, reduces the process difficulty and improves the process effect.
The technical purpose of the invention is realized by the following technical scheme:
the water quenching kiln slag treatment method comprises the following steps:
carrying out magnetic separation on the screened kiln slag for multiple times to obtain primary separated coal and residual materials;
in order to further obtain coal, the residual materials are put into a jigger to be sorted to obtain secondary separated coal and secondary residual materials;
and then the secondary residual materials sequentially pass through a spiral dehydrator, a ball mill and a magnetic separator to enter a filter press, and are filtered by the filter press to obtain fine iron powder and zinc-containing tailings.
In one embodiment, the multiple magnetic separations comprises magnetic separation using at least two stages of magnetic separators.
In one embodiment, a spiral dehydrator is used for dehydrating materials after the magnetic separation is carried out for multiple times to obtain the first-time separated coal.
In one embodiment, the jigger adopts a hydraulic jigger.
In one embodiment, the jigger is connected with the water feeder, and the water feeder automatically supplies water to realize uninterrupted automatic operation.
In one embodiment, the jigger can separate the pulverized coal from the calcium silicate powder in the pulverized coal.
In one embodiment, the secondary residue is dewatered by a screw dewaterer to form a dry solid, and then pressed and milled by a ball mill to form a small particle powder.
In one embodiment, the small-particle powder is magnetically absorbed by a primary magnetic separator to obtain most of metal powder containing more impurities; and screening the iron concentrate powder in a second-stage magnetic separator.
In one embodiment, the filter press realizes the recovery by sticking the zinc-containing tailings on the filter plate through the punching of clean water.
In conclusion, the invention has the following beneficial effects:
(1) on the premise of not changing the shape of the coal, the recovery rate of the coal is improved, and the coal can be directly sold and used as a product on the premise of not needing to be purified again;
(2) the silicon-calcium powder screened out when the jigger is utilized can be used as another byproduct, so that the recovery rate of kiln slag is improved, the economic benefit of the process is improved, and the silicon-calcium powder can be directly used as cement clinker.
(3) The zinc-containing tailings have high zinc content and can be used as a smelting raw material.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.
As shown in fig. 1, the water quenching kiln slag treatment method comprises the following steps:
carrying out magnetic separation on the screened kiln slag for multiple times to obtain primary separated coal and residual materials, wherein hydraulic screening equipment is adopted for screening;
in order to further obtain coal, the residual materials are put into a jigger to be sorted to obtain secondary separated coal and secondary residual materials;
and then the secondary residual materials are sequentially processed by a spiral dehydrator, a ball mill and a magnetic separator to obtain iron fine powder, the iron fine powder enters a filter press to be filtered by the filter press to obtain zinc-containing tailings and water, the water is input into a water return tank through a pipeline, and the water is pumped into hydraulic screening equipment through a water pump to be used.
Specifically, the coal separated in one time has no change in properties, and can be directly sold for fire coal. The secondary separation coal has lower purity than the primary coal, and can be used for producing fuel by using secondary zinc oxide or shale bricks. The jigging machine uses water as a medium to perform sorting by density difference, taking the jigging machine produced by Huawei environment-friendly machinery as an example, metal and coal can be effectively sorted, materials are put into a box body through a feeding hole, a cam is driven by a motor to move so as to realize sorting, and metal materials with large density are discharged from a discharging hole and enter the next process.
Magnetic separation many times includes and utilizes the two-stage magnet separator to carry out the magnetic separation at least, and the purity and the rate of recovery of coal are guaranteed in many times magnetic separation, avoid the interference of metallic element to the coal, further throw into the material after the magnetic separation and separate once more in the jigging machine simultaneously, and coal, silicon and calcium after the separation dewater through the screw dehydrator, and the water that the screw dehydrator exhaust gets into sedimentation separation in the sedimentation tank, and clear water gets into return water pond circulation through the pipeline and uses. And then the rest materials separated from the water are put into a ball mill for subsequent working procedures.
And dehydrating the materials by using a spiral dehydrator after the magnetic separation for multiple times to obtain dry first-time separated coal.
The jigging machine is connected with the water supply machine, and the water supply machine automatically supplies water to realize uninterrupted automatic work.
The jigger can separate the coal powder from the silicon-calcium powder in the coal powder.
And the secondary residual materials are dehydrated by a spiral dehydrator and then are extruded and milled by a ball mill to form small-particle powder.
The small particle powder is magnetically attracted to most of metal powder containing more impurities through a primary magnetic separator; and screening the iron concentrate powder in a second-stage magnetic separator.
The filter press makes zinciferous tailing glue on the filter plate through the clear water punching press and realizes retrieving, and filter press one end is the feed inlet, and the feed inlet lower extreme is provided with the water inlet, and filter press organism embeds has the polylith filter plate, and the filtration pore of filter plate is set for according to the granularity of zinc, dwindles to other end filtration pore by the water inlet end gradually, and the organism other end is the delivery port, and the filter plate keeps higher height, can form the higher water layer of water level at the water-washed in-process that pushes, and the punching of water one deck layer is makeed the zinc of different particle diameters to adhere to on the filter plate one by one.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. The water quenching kiln slag treatment method comprises the following steps:
carrying out magnetic separation on the screened kiln slag for multiple times to obtain primary separated coal and residual materials;
in order to further obtain coal, the residual materials are put into a jigger to be sorted to obtain secondary separated coal and secondary residual materials;
and then the secondary residual materials sequentially pass through a spiral dehydrator, a ball mill and a magnetic separator to enter a filter press, and are filtered by the filter press to obtain fine iron powder and zinc-containing tailings.
2. The water quenching kiln slag processing method as claimed in claim 1, characterized in that: the multiple magnetic separation comprises magnetic separation by at least two stages of magnetic separators.
3. The water quenching kiln slag processing method as claimed in claim 1, characterized in that: and dehydrating the materials by using a spiral dehydrator after the magnetic separation for multiple times to obtain the first-time separated coal.
4. The water quenching kiln slag processing method as claimed in claim 1, characterized in that: the jigging machine adopts a hydraulic jigging machine.
5. The water quenching kiln slag processing method as claimed in claim 1, characterized in that: the jigging machine is connected with the water supply machine, and the water supply machine automatically supplies water to realize uninterrupted automatic work.
6. The water quenching slag treatment method as claimed in any one of claims 1 to 4, wherein: the jigging machine can separate the coal dust from the silicon-calcium impurities in the coal dust.
7. The water quenching kiln slag processing method as claimed in claim 1, characterized in that: and dehydrating the secondary residual materials by a spiral dehydrator to form dry solids, and extruding and grinding the dry solids by a ball mill to form small-particle powder.
8. The water quenching kiln slag processing method as claimed in claim 7, characterized in that: the small particle powder is magnetically attracted to most of metal powder containing more impurities through a primary magnetic separator; and screening the iron concentrate powder in a second-stage magnetic separator.
9. The water quenching kiln slag processing method as claimed in claim 1, characterized in that: the filter press realizes the recovery by sticking the zinc-containing tailings on the filter plate through the stamping of clear water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745033.9A CN113522518B (en) | 2021-06-30 | 2021-06-30 | Water quenching kiln slag treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745033.9A CN113522518B (en) | 2021-06-30 | 2021-06-30 | Water quenching kiln slag treatment method |
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| Publication Number | Publication Date |
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| CN113522518A true CN113522518A (en) | 2021-10-22 |
| CN113522518B CN113522518B (en) | 2023-10-31 |
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