CN113845286A - A method for synergistic pyrolysis of oily sludge and aluminum slag - Google Patents
A method for synergistic pyrolysis of oily sludge and aluminum slag Download PDFInfo
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 60
- 239000002893 slag Substances 0.000 title claims abstract description 55
- 239000010802 sludge Substances 0.000 title claims abstract description 52
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000002195 synergetic effect Effects 0.000 title claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 7
- 239000002244 precipitate Substances 0.000 claims description 7
- 239000006228 supernatant Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 4
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 4
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 4
- 239000001099 ammonium carbonate Substances 0.000 claims description 4
- 239000000084 colloidal system Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- -1 aluminum ions Chemical class 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000012159 carrier gas Substances 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 14
- 230000003197 catalytic effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
-
- 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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Water Supply & Treatment (AREA)
- Composite Materials (AREA)
- Geology (AREA)
- Hydrology & Water Resources (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Sludge (AREA)
Abstract
本发明提供了一种含油污泥和铝渣协同热解的方法，包括物料破碎、组分复配、通气排气、高温热解、冷凝分离、残渣资源化利用共六个步骤，利用铝渣的催化作用提高含油污泥的热解效率，充分挖掘含油污泥、铝渣中的有效成分，用活化的热解残渣制备活化炭纳米氧化铝。本方法实现了含油污泥与铝渣的协同热解处理，提高了含油污泥的热解效率和铝渣的资源化利用效率，实现含油污泥与铝渣的协同热解处理，具有广泛的应用前景。
The invention provides a method for co-pyrolysis of oily sludge and aluminum slag. The catalysis of the oily sludge improves the pyrolysis efficiency of the oily sludge, fully excavates the effective components in the oily sludge and aluminum slag, and uses the activated pyrolysis residue to prepare the activated carbon nano-alumina. The method realizes the synergistic pyrolysis treatment of oily sludge and aluminum slag, improves the pyrolysis efficiency of oily sludge and the resource utilization efficiency of aluminum slag, realizes the synergistic pyrolysis treatment of oily sludge and aluminum slag, and has a wide range of advantages. application prospects.
Description
Technical Field
The invention belongs to the field of solid waste disposal, and particularly relates to a method for the collaborative pyrolysis of oil-containing sludge and aluminum slag.
Background
The aluminum slag and the oily sludge are solid wastes generated in energy chemical industries such as petrochemical industry, metallurgy and the like, and are stacked or buried in the open air for a long time, so that heavy metal elements and toxic substances in the solid wastes enter soil to pollute crops, and the food safety and the health safety of people are finally influenced through continuous enrichment.
The source, sludge composition and properties of the oily sludge are different, and thus the disposal of the oily sludge is different. Wherein, the oil-containing sludge pyrolysis is a chemical decomposition thermal reaction process for decomposing the oil-containing sludge into gas, liquid and solid phases under the inert gas atmosphere or the vacuum state. The oily sludge can be recycled by pyrolysis treatment, and the generated combustible gas and pyrolysis oil can be used as energy. In addition, the carbon content in the pyrolysis residue of the oily sludge is sharply reduced by the catalytic action of metallic aluminum, alumina, and the like. The aluminum slag is solid waste generated in the electrolytic smelting process, contains a large amount of toxic heavy metal substances such as aluminum, iron and the like, and can cause soil and water environment to be damaged when being randomly stacked or buried. How to improve the pyrolysis efficiency of the oil-containing sludge by utilizing the catalytic action of the aluminum slag and fully excavate effective components in the oil-containing sludge and the aluminum slag is a problem to be solved urgently.
Disclosure of Invention
Aiming at how to improve the pyrolysis efficiency of the oily sludge by utilizing the catalytic action of the aluminum slag and fully excavate the effective components in the oily sludge and the aluminum slag, the invention provides a method for the collaborative pyrolysis of the oily sludge and the aluminum slag. The invention comprises the following steps:
(1) crushing materials, wherein the material crushing is to crush oily sludge and aluminum slag of the materials respectively to form small particles;
(2) compounding components, wherein the compounding of the components is to add aluminum slag into the oily sludge to form a mixed component;
(3) ventilating and exhausting, wherein after the pyrolysis furnace is sealed, high-purity nitrogen is introduced to exhaust oxygen in the furnace;
(4) performing high-temperature pyrolysis, namely putting the mixed components in a high-temperature oxygen-free environment for calcination and activation, and performing high-temperature pyrolysis on the oily sludge to obtain a pyrolysis product; calcining the aluminum slag at high temperature to form activated aluminum slag;
(5) condensing and separating, namely separating gas and liquid generated by pyrolysis, drying the gas and collecting the gas;
(6) and (3) carrying out resource utilization on the residues, wherein the resource utilization of the residues is to prepare the activated carbon nano-alumina by using the oily sludge and the aluminum residue pyrolysis residues as raw materials.
Further, in the step (1), the crushed particle size of the material is not more than 50 mm.
Further, in the step (2), the components compounded by the components are mixed in a ratio of aluminum slag to sludge containing 1: 3, the mixture is uniformly mixed.
In the step (3), the ventilation and the exhaust are performed in such a way that the inside of the pyrolysis furnace is in an oxygen-insulated environment, and nitrogen is used as a protective gas.
Further, in the step (4), the temperature in the pyrolysis furnace is increased to a corresponding pyrolysis temperature by means of external heating, and the temperature range is 750-900 ℃.
Further, in the step (5), the carrier gas (nitrogen) drives the pyrolysis product to pass through a condensing device, the heavy component is liquefied and enters an oil component collecting bottle, and the gas component enters a gas collecting device through a drying device and is collected.
Further, in the step (6), the step of recycling the residue includes: soaking the activated slag sample in deionized water, and taking supernatant to adjust the pH value to be more than 13 so as to remove iron and silicon in the solution; adding calcium oxide, standing for a period of time, and removing precipitated impurities by centrifugation; adding ammonium bicarbonate solution with the same concentration as the aluminum ions into the filtrate until the solution completely generates white colloidal precipitate, standing the precipitate, sucking out the supernatant, and keeping the colloidal solution uniform; repeatedly pickling the obtained solid slag sample, and drying the slag sample in an oven after pickling; mixing and stirring the dried slag sample after acid cleaning and white colloid, performing solid-liquid separation on the stirred solution by using a screen, retaining the separated solution, drying the loaded slag sample, and calcining for 4 hours in a furnace; and stirring the calcined sample and the filtrate obtained by centrifugation, and repeating the steps to obtain the activated carbon nano aluminum oxide material.
The invention has the beneficial effects that:
according to the invention, through the cooperative treatment of the oily sludge and the aluminum slag, the pyrolysis efficiency of the oily sludge is improved by utilizing the catalytic action of the aluminum slag, the effective components in the oily sludge and the aluminum slag are fully excavated, and the activated carbon nano-alumina is prepared by taking pyrolysis residues as raw materials, so that the cooperative pyrolysis treatment of the oily sludge and the aluminum slag is realized. The invention improves the pyrolysis efficiency of the oily sludge by utilizing the catalytic action of aluminum, realizes the resource utilization of the aluminum slag, and has high energy-saving and environment-friendly benefits.
Drawings
FIG. 1 is a process flow diagram of a method for the co-pyrolysis of oil-containing sludge and aluminum dross.
Detailed Description
The present invention will be further explained with reference to the drawings and examples, and it should be noted that the present embodiment is a detailed description of the technical method of the present invention, and does not limit the technical method of the present invention in any way, and all pyrolysis pretreatment and residue recycling methods in the field and the similar field of the present invention should be protected by the present invention.
Examples
As shown in figure 1, a process flow chart of a method for the synergistic pyrolysis of oil-containing sludge and aluminum slag.
In the embodiment, the oil-containing sludge and the aluminum slag are subjected to synergistic pyrolysis, and the aluminum slag plays a role of a catalyst in a catalytic cracking reaction of the oil-containing sludge, so that the rate of the pyrolysis reaction is greatly increased. The chloride ions in the aluminum slag are extracted by an alkali fusion method, and then the aluminum hydroxide colloid prepared by ammonium bicarbonate is further purified by drying, acid washing, ultrasonic cleaning and the like. The concrete process comprises five steps of material crushing, component compounding, ventilation and exhaust, high-temperature pyrolysis, condensation separation and residue resource utilization, and the concrete steps are as follows.
The oil content of the oily sludge in this example was 30%, the water content was 28%, and the solid content was 35%. Crushing the oily sludge and the aluminum slag to be less than 50mm, uniformly mixing the crushed oily sludge and the aluminum slag according to the mass ratio of 3:1, then feeding the mixed materials into a high-temperature pyrolysis furnace, sealing the high-temperature pyrolysis furnace, introducing high-purity nitrogen into the high-temperature pyrolysis furnace at the speed of 200mL/min for 30min, and heating the high-temperature pyrolysis furnace after exhausting oxygen in the furnace; the furnace temperature is kept at about 750 ℃; the nitrogen drives the pyrolysis product to pass through a condensing device, the heavy component is liquefied and enters an oil content collecting device, and the gas component enters a gas collecting device through a drying device and is collected; and the residues generated by pyrolysis are activated residues and enter a subsequent residue resource utilization system.
Soaking the activated residue in deionized water, stirring for 30min, collecting supernatant, adding a certain amount of sodium hydroxide to adjust pH to be higher than 13, adding 0.01g of calcium oxide, standing for 24 hr, and centrifuging to remove precipitate impurities; adding an ammonium bicarbonate solution with the same concentration as the aluminum ions of the filtrate into the filtrate until the solution completely generates white colloidal precipitate, standing the precipitate, sucking out supernatant, and stirring to keep the colloidal solution uniform; taking the solid residue value generated by pyrolysis, repeatedly pickling with acid liquor, and drying the residue after pickling; then mixing and stirring the residue after acid cleaning and drying with uniform colloid for 1h, then carrying out solid-liquid separation by using a screen, drying the separated residue, then continuously feeding into a pyrolysis furnace, and calcining for 4h at 750 ℃; and stirring the calcined solid and the filtrate obtained by centrifugation, and then repeatedly calcining to obtain the activated carbon nano aluminum oxide material.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. The method for the collaborative pyrolysis of the oil-containing sludge and the aluminum slag is characterized by comprising the following steps of:
step 1: respectively crushing the oily sludge and the aluminum slag to form small particles;
step 2: adding aluminum slag into the oily sludge to form a mixed component;
and step 3: after the pyrolysis furnace is sealed, high-purity nitrogen is introduced, so that oxygen in the furnace is exhausted;
and 4, step 4: calcining and activating the mixed components in a high-temperature oxygen-free environment in a pyrolysis furnace, pyrolyzing the oily sludge at high temperature to obtain a pyrolysis product, and calcining the aluminum slag at high temperature to form activated aluminum slag;
and 5: the activated carbon nano-alumina is prepared by using oily sludge and aluminum slag pyrolysis residues as raw materials.
2. The method for the co-pyrolysis of the oil-containing sludge and the aluminum slag according to claim 1, wherein in the step 1, the particle size of the small particles is not more than 50 mm.
3. The method for the co-pyrolysis of the oil-containing sludge and the aluminum slag according to claim 1, wherein the ratio of the aluminum slag to the oil-containing sludge in the step 2 is 1: 3, the mixture is uniformly mixed.
4. The method for the synergic pyrolysis of the oil-containing sludge and the aluminum slag as claimed in claim 1, wherein in the step 4, the temperature in the pyrolysis furnace is raised to 750-900 ℃ by means of external heating.
5. The method for the collaborative pyrolysis of the oil-containing sludge and the aluminum slag as claimed in claim 1, wherein in the step 4, the carrier gas generated by the high-temperature pyrolysis drives the pyrolysis product to pass through a condensing device, the heavy component is liquefied and enters an oil collecting bottle, and the gas component passes through a drying device and enters a gas collecting device to be collected.
6. The method for the collaborative pyrolysis of the oil-containing sludge and the aluminum slag according to claim 1, wherein in the step 5, the step of preparing the activated carbon nano alumina comprises the following steps: step 5.1: soaking the pyrolysis residue in deionized water, and taking supernatant to adjust the pH value to be more than 13;
step 5.2: adding calcium oxide into the supernatant, standing for a period of time, and removing precipitated impurities by centrifugation;
step 5.3: 5.2, adding an ammonium bicarbonate solution with the same concentration as the aluminum ions into the filtrate obtained by centrifugation until the solution completely generates white colloidal precipitate, standing the precipitate, sucking out the supernatant, and keeping the colloidal solution uniform;
step 5.4: repeatedly pickling the solid slag sample obtained in the step 5.1, and drying the slag sample in an oven after pickling;
step 5.5: mixing and stirring the dried solid slag sample after acid cleaning and white colloid, performing solid-liquid separation on the stirred solution by using a screen, retaining the separated solution, drying the separated slag sample, and then feeding the slag sample into a pyrolysis furnace for calcination;
step 5.6: and (3) stirring the calcined slag sample and the filtrate obtained by centrifuging in the step 5.5, and repeating the steps to obtain the activated carbon nano aluminum oxide material.
7. The method for the collaborative pyrolysis of the oil-containing sludge and the aluminum slag according to claim 6, wherein in the step 5.5, the calcination time is 4 hours, and the calcination temperature is 750-900 ℃.
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| WO2023193419A1 (en) * | 2022-04-08 | 2023-10-12 | 天津大学 | Oil-containing sludge treatment method, soil remediation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023193419A1 (en) * | 2022-04-08 | 2023-10-12 | 天津大学 | Oil-containing sludge treatment method, soil remediation method |
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Application publication date: 20211228 |