CN113999666B - Method for preparing ceramsite proppant from solid hazardous waste secondary aluminum ash - Google Patents
Method for preparing ceramsite proppant from solid hazardous waste secondary aluminum ash Download PDFInfo
- Publication number
- CN113999666B CN113999666B CN202111307211.6A CN202111307211A CN113999666B CN 113999666 B CN113999666 B CN 113999666B CN 202111307211 A CN202111307211 A CN 202111307211A CN 113999666 B CN113999666 B CN 113999666B
- Authority
- CN
- China
- Prior art keywords
- ceramsite
- secondary aluminum
- aluminum ash
- ash
- heating
- Prior art date
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to preparation of a petroleum fracturing propping agent, and provides a method for preparing a ceramsite propping agent from solid hazardous waste secondary aluminum ash. The raw materials for preparing the ceramsite proppant comprise kaolin, secondary aluminum ash and fly ash, and the preparation method has the key points that: kaolin and secondary aluminum ash are used as main materials, and a small amount of fly ash is used as an additive to be uniformly mixed; grinding the mixture into fine powder with a certain particle size specification, and then adding water for granulation to prepare wet granules; drying the wet granules in an oven to obtain a ceramsite blank with certain moisture; and finally, calcining the ceramsite blank at high temperature to obtain a finished product of the secondary aluminum ash ceramsite proppant. The performance of the prepared ceramsite proppant meets the SY/T5108-2014 index requirement, and the industrial use specification is met. The ceramsite proppant prepared by the method can effectively solve the problem of environmental pollution caused by secondary aluminum ash of solid hazardous wastes, eliminate worries about the healthy development of the electrolytic aluminum industry, and also supplement the great demand of the petroleum exploitation industry on petroleum fracturing ceramsite proppants.
Description
Technical Field
The invention relates to a preparation method of a petroleum fracturing propping agent, in particular to a method for preparing a ceramsite propping agent from solid hazardous waste secondary aluminum ash.
Background
The secondary aluminum ash is a gray powder industrial waste which is a byproduct in the electrolytic aluminum industry, wherein aluminum nitride and aluminum carbide contained in the industrial waste generate ammonia gas, methane and other gases when meeting water, emit foul smell, and can cause harmful effects on human health and atmospheric environment, fluoride and cyanide are dissolved out when meeting water to pollute natural water, and can cause serious harm to the natural environment if being directly buried without treatment, so the secondary aluminum ash is listed in national hazardous waste records (2021 edition). In recent decades, along with the optimization of enterprise structures and the continuous expansion of aluminum product productivity, the electrolytic aluminum industry has occupied a very important position in China, the problem of secondary aluminum ash is increasingly troublesome, and if the secondary aluminum ash cannot be effectively treated in time, the benign development of the electrolytic aluminum industry is inevitably influenced. The ceramsite oil fracturing propping agent is prepared by taking secondary aluminum ash as a raw material, a 'Kangzhuang Daodao' is opened up for the effective utilization of the aluminum ash, the huge demand of hydraulic fracturing operation on the propping agent in oil exploitation can be supplemented, and the development mode of 'self-production and self-elimination' of the secondary aluminum ash of solid hazardous wastes is expected to be realized.
The ceramsite proppant is prepared by taking bauxite or other aluminum mineral substances as a base material and adding a proper amount of other mineral auxiliary materials, and the more mature preparation process comprises a melt blowing method and a sintering method. The melt blowing method melts the pretreated mixture at high temperature, and the obtained liquid material is sprayed by high-pressure gas to form a spherical product. The most mature industrialized process is sintering, which refers to the production process of refractory materials and ceramics, the materials are ground into powder with certain grain diameter, granulated and formed, and then melted, crystallized and compacted at the sintering temperature to obtain the final product.
In addition to the traditional bauxite-based ceramsite proppant, in recent years, in order to improve the utilization rate of industrial waste or mineral residues, various students and enterprises try to prepare the ceramsite proppant by using other solid waste with high aluminum content as a raw material. On one hand, the ceramsite proppant with more functions can be developed, the old road with the simplified raw materials is jumped out, and the performance deficiency caused by the attribute of the raw material body is made up; on the other hand, the method can promote the recycling of a large amount of harmful byproducts in industrial development and open up a wider space for the industrial development road of resource sustainability.
Chinese patent CN202110095057.4 discloses a preparation process of a coal gangue low-density petroleum ceramsite proppant, which comprises the following steps: crushing raw coal gangue into particles of 812 mm; then calcining the mixture for 25 to 30min at the temperature of between 750 and 850 ℃ by a decarburization rotary kiln, and performing desulfurization, decarburization and dehydration; after the coal gangue subjected to the 'three-removal' is mixed with auxiliary materials, the mixture is ball-milled into fine powder of 350-400 meshes; granulating the qualified fine powder mixture and water according to the proportion of 8; and finally, calcining the dry ceramic granules in a rotary kiln at 1100-1350 ℃ for 40-50 min, and cooling to obtain the final product. The ceramsite proppant produced by the process has the advantages of high compactness, good compressive strength, and smaller breakage rate and ignition loss rate.
Chinese patent CN202010363776.5 discloses a ceramsite proppant prepared from blast furnace tapping channel waste and a preparation process thereof: 30-60% of iron tap channel waste, 10-40% of clay, 20-50% of shale and 0-10% of sintering aid are used as raw materials, and a ceramsite proppant finished product is prepared by mixing, granulating, screening and calcining. The performance of the ceramsite proppant prepared by the method meets the SY/T5108-2014 industrial standard, the blast furnace tapping channel waste is used as a raw material, the resource utilization rate is improved, and the problems of waste of land resources and environmental damage caused by stacking of solid waste are solved.
Chinese patent CN202110379031.2 discloses a preparation method and application of a low-density ceramsite proppant added with pretreated electrolytic manganese slag: the waste residue after the process of extracting the metal manganese by wet electrolysis is calcined for 2 to 3 hours at 650 to 750 ℃ to obtain the pretreated electrolytic manganese residue, the electrolytic manganese residue and bauxite are used as raw materials to prepare a ball blank, and the ball blank is calcined to a finished product at 1150 to 1250 ℃, and the addition proportion of the pretreated electrolytic manganese residue can reach 15 to 20 percent. The performance of the low-density ceramsite proppant prepared by the method meets the SY/T5108-2014 industrial standard, can be used for replacing natural quartz sand for fracturing operation under 52MPa of closed pressure, and is particularly used for ceramsite proppant for hydraulic fracturing exploitation of shallow oil and natural gas.
Disclosure of Invention
The invention aims to solve the problem of effective utilization of secondary aluminum ash, which is a solid hazardous waste by-product in the electrolytic aluminum industry, and provides a method for preparing a ceramsite proppant by taking the secondary aluminum ash, kaolin and fly ash as raw materials. By the method, the problem of secondary aluminum ash in the electrolytic aluminum industry can be effectively relieved, and the prepared ceramsite proppant can be directly used in the oil exploitation industry.
The ceramsite proppant prepared by the method takes secondary aluminum ash and kaolin as main raw materials, a small amount of fly ash as an auxiliary raw material, and a finished product is prepared by grinding, mixing, granulating, drying and calcining. The concrete method for preparing the ceramsite proppant by using the raw materials comprising 20-80% of kaolin, 10-65% of secondary aluminum ash and 1-10% of fly ash comprises the following steps:
(1) Mixing the secondary aluminum ash and kaolin according to the mass ratio of 1.5-1;
(2) Fully grinding the mixture obtained in the step (1) by using a ball mill to obtain a fine powder material with the granularity of 325 meshes;
(3) Feeding the fine powder material obtained in the step (2) into a granulator, and spraying atomized liquid for granulation to prepare spherical wet granules with the granularity of 18-25 meshes;
(4) Drying the wet granular material obtained in the step (3) at 50-90 ℃ for 30 minutes, and then sieving again to obtain a ceramsite blank with 18-25 meshes and 1-10% of water content;
(5) And (5) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 10 ℃/min, keeping the temperature for 0.5-2 h, then heating to 900 ℃ at a constant temperature for 0.5-2 h, finally heating to 1100-1400 ℃ at a constant temperature for 1-4 h, and naturally cooling to room temperature to obtain the finished ceramsite proppant.
The secondary aluminum ash ceramsite proppant prepared by the invention has the following advantages:
(1) The secondary aluminum ash in the raw materials used by the ceramsite proppant is solid hazardous waste, the additive fly ash also belongs to industrial waste, and the secondary aluminum ash and the industrial waste are both industrial waste recycled and reused, so that the ceramsite proppant conforms to the concept of green development;
(2) The preparation method adopted by the ceramsite proppant belongs to a sintering method, has a relatively mature production process for reference, and has relatively strong industrial feasibility;
(3) The ceramsite proppant product can be directly used for hydraulic fracturing operation in oil exploitation, so that the use cost of the ceramsite proppant in the oil industry is greatly reduced;
(4) Effectively solving the problem of secondary aluminum ash treatment of solid hazardous wastes in the electrolytic aluminum industry and clearing obstacles for further development of the electrolytic aluminum industry;
(5) The coal-electricity-aluminum industrial chain is extended to the petroleum industry, forms a coal-electricity-aluminum-oil special industrial chain, improves the deep utilization of regional special resources, and promotes the strong development of regional economy.
Detailed Description
The present invention is further described in detail below by way of examples so that the reader may more clearly understand the objects, techniques, and advantages of the present invention. The following examples and descriptions thereof are merely illustrative of the present invention and are not intended to limit the scope of the invention.
Example 1
The preparation method of the petroleum fracturing propping agent comprises the following steps:
(1) Mixing the secondary aluminum ash and kaolin according to the mass ratio of 1.5-1;
(2) Fully grinding the mixture obtained in the step (1) by using a ball mill to obtain a fine powder material with the granularity of 325 meshes;
(3) Feeding the fine powder material obtained in the step (2) into a granulator, and spraying atomized liquid for granulation to prepare spherical wet granules with the granularity of 18-25 meshes;
(4) Drying the wet granular material obtained in the step (3) at 50-80 ℃ for 30 minutes, and then sieving again to obtain 18-25 meshes of ceramsite blank containing 1-10% of water;
(5) And (4) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 2h, then heating to 900 ℃ and keeping the temperature for 2h, finally heating to 1110-1400 ℃ and keeping the temperature for 2-4 h, and naturally cooling to room temperature to obtain the finished ceramsite proppant.
In the embodiment, 1-5% of fly ash is added as a raw material according to the mass ratio of 1.5 between the secondary aluminum ash and the kaolin, and the total mass of the secondary aluminum ash and the kaolin is taken as a calculation reference; and (4) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ and keeping the temperature for 1h, finally heating to 1250 ℃ and keeping the temperature for 3h, and naturally cooling to room temperature to obtain a finished ceramsite proppant product. The apparent density of the proppant is more than or equal to 3.35g/cm < 3 >, the breaking rate under the closing pressure of 69MPa is less than or equal to 5.0 percent, and the acid solubility is less than or equal to 5 percent.
Example 2
In the embodiment, 1% of fly ash is added as a raw material into the secondary aluminum ash and the kaolin according to the mass ratio of 1; and (4) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ at a constant temperature for 1h, finally heating to 1300 ℃ at a constant temperature for 2h, and naturally cooling to room temperature to obtain a ceramsite proppant finished product. The apparent density of the proppant is less than or equal to 3.35g/cm < 3 >, the breaking rate under the closed pressure of 52MPa is less than or equal to 5.0 percent, and the acid solubility is less than or equal to 5 percent.
Example 3
In the embodiment, 1% of fly ash is added as a raw material according to the mass ratio of 1; and (5) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ at a constant temperature for 1h, finally heating to 1300 ℃ at a constant temperature for 2h, and naturally cooling to room temperature to obtain a finished ceramsite proppant product. The apparent density of the proppant is less than or equal to 3.00g/cm < 3 >, the breaking rate under the closing pressure of 52MPa is less than or equal to 7.0 percent, and the acid solubility is less than or equal to 5 percent.
Example 4
In the embodiment, the secondary aluminum ash and the kaolin are added with 3% of fly ash as raw materials according to the mass ratio of 1; and (5) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ at a constant temperature for 1h, finally heating to 1250 ℃ at a constant temperature for 3h, and naturally cooling to room temperature to obtain a finished ceramsite proppant product. The apparent density of the proppant is less than or equal to 2.80g/cm < 3 >, the breaking rate under the closed pressure of 52MPa is less than or equal to 6.0 percent, and the acid solubility is less than or equal to 5 percent.
Example 5
In the embodiment, the secondary aluminum ash and the kaolin are added with 2% of fly ash as raw materials according to the mass ratio of 1; and (4) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ and keeping the temperature for 1h, finally heating to 1300 ℃ and keeping the temperature for 3h, and naturally cooling to room temperature to obtain a ceramsite proppant finished product. The apparent density of the propping agent is less than or equal to 2.60g/cm < 3 >, the breaking rate under the closed pressure of 52MPa is less than or equal to 7.0 percent, and the acid solubility is less than or equal to 5 percent.
Comparative example 1
In the embodiment, the secondary aluminum ash and the kaolin are added with 1% of fly ash as raw materials according to the mass ratio of 0 to 1 and taking the total mass of the two as a calculation reference; and (4) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ and keeping the temperature for 1h, finally heating to 1250 ℃ and keeping the temperature for 3h, and naturally cooling to room temperature to obtain a finished ceramsite proppant product. The apparent density of the proppant is less than or equal to 3.00g/cm < 3 >, the breaking rate under the closed pressure of 52MPa is more than or equal to 5.0 percent, and the acid solubility is more than or equal to 5 percent.
Comparative example 2
In the embodiment, 1% of fly ash is added as a raw material according to the mass ratio of 1; and (4) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ at a constant temperature for 1h, finally heating to 1000 ℃ at a constant temperature for 2h, and naturally cooling to room temperature to obtain a ceramsite proppant finished product. The apparent density of the proppant is less than or equal to 3.35g/cm < 3 >, the breaking rate under the closed pressure of 52MPa is more than or equal to 5.0 percent, and the acid solubility is more than or equal to 5 percent.
Comparative example 3
In the embodiment, the secondary aluminum ash and kaolin are used as raw materials according to the mass ratio of 1; and (5) calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 5 ℃/min, keeping the temperature for 1h, then heating to 900 ℃ at a constant temperature for 1h, finally heating to 1200 ℃ at a constant temperature for 2h, and naturally cooling to room temperature to obtain a finished ceramsite proppant product. The apparent density of the propping agent is less than or equal to 3.00g/cm < 3 >, the breaking rate under the closed pressure of 52MPa is less than or equal to 7.0 percent, and the acid solubility is less than or equal to 5 percent.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and all modifications, equivalents, substitutions, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (1)
1. A preparation method of a secondary aluminum ash ceramsite proppant specifically comprises the following steps: (1) Mixing the secondary aluminum ash and kaolin according to the mass ratio of 1.5-1;
(2) Fully grinding the mixture obtained in the step (1) by using a ball mill to obtain a fine powder material with the granularity of 325 meshes;
(3) Feeding the fine powder material obtained in the step (2) into a granulator, and spraying atomized liquid for granulation to prepare spherical wet granules with the granularity of 18-25 meshes;
(4) Drying the wet granular material obtained in the step (3) at 50-90 ℃ for 30 minutes, and then screening again to obtain 18-25 meshes of ceramsite blank containing 1-10% of water;
(5) Calcining the blank obtained in the step (4), heating to 600 ℃ at a heating rate of less than or equal to 10 ℃/min for 0.5-2 h, then heating to 900 ℃ at a constant temperature for 0.5-2 h, finally heating to 1100-1400 ℃ at a constant temperature for 1-4 h, and naturally cooling to room temperature to obtain a ceramsite proppant finished product;
the secondary aluminum ash and kaolin are used as main raw materials, and the fly ash is used as an additive;
the raw materials comprise the following components in percentage by mass: 20-80% of kaolin, 10-65% of secondary aluminum ash and 1-10% of fly ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111307211.6A CN113999666B (en) | 2021-11-05 | 2021-11-05 | Method for preparing ceramsite proppant from solid hazardous waste secondary aluminum ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111307211.6A CN113999666B (en) | 2021-11-05 | 2021-11-05 | Method for preparing ceramsite proppant from solid hazardous waste secondary aluminum ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113999666A CN113999666A (en) | 2022-02-01 |
| CN113999666B true CN113999666B (en) | 2023-02-21 |
Family
ID=79928029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111307211.6A Active CN113999666B (en) | 2021-11-05 | 2021-11-05 | Method for preparing ceramsite proppant from solid hazardous waste secondary aluminum ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113999666B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105754581A (en) * | 2016-04-06 | 2016-07-13 | 沈阳化工大学 | Method for preparing petroleum propping agent from aluminum ash and aluminum residues |
-
2021
- 2021-11-05 CN CN202111307211.6A patent/CN113999666B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105754581A (en) * | 2016-04-06 | 2016-07-13 | 沈阳化工大学 | Method for preparing petroleum propping agent from aluminum ash and aluminum residues |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113999666A (en) | 2022-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110282925B (en) | Artificial porous aggregate of carbonized steel slag and preparation method thereof | |
| CN105778886A (en) | Low-density high-strength ceramsite proppant and preparation process thereof | |
| CN110104975B (en) | Process for preparing coal gangue lightweight aggregate by belt type roasting machine pelletizing method | |
| US20150053118A1 (en) | Method for using waste concrete as blending material in cement production and cement thus obtained | |
| CN109400084B (en) | High-solid waste alkali-activated titanium slag extraction stabilized soil and preparation method thereof | |
| CN109626960A (en) | A kind of coal gangue haydite proppant and preparation method thereof | |
| WO2017016062A1 (en) | Low-calcium silicate cement, and preparation method and hardening method thereof | |
| CN103288430B (en) | Method for preparing special fracturing propping agent for shale gas by utilizing low-carbon coal gangue | |
| CN106810291A (en) | A kind of water treatment ceramsite of cobalt melting waste slag base and preparation method thereof | |
| CN112919889B (en) | Preparation method and application of low-density ceramsite propping agent added with pretreated electrolytic manganese slag | |
| CN102633448A (en) | Fluorgypsum-based cementing materials for filling tailings and preparation method thereof | |
| CN113480322A (en) | Ceramsite prepared from high-alumina fly ash and preparation method thereof | |
| CN112811885A (en) | Preparation method and application of proppant added with electrolytic manganese slag ceramsite | |
| CN113999666B (en) | Method for preparing ceramsite proppant from solid hazardous waste secondary aluminum ash | |
| CN102994742A (en) | Method for producing sintered pellets by using red mud | |
| CN104250083B (en) | A kind of metallurgical slag air entrained concrete and processing technology and application | |
| CN110950641A (en) | Self-heat-release solid waste based ultralow-density proppant and preparation method thereof | |
| CN114214056B (en) | Fracturing propping agent for shale gas exploitation and preparation method thereof | |
| CN108264249B (en) | Ferronickel slag-slag low-hydration-heat cementing material and preparation method thereof | |
| CN102060496B (en) | Rock ballast powder aerated concrete and preparation method thereof | |
| CN105331355B (en) | A kind of petroleum fracturing propping agent prepared using oil shale waste slag and preparation method thereof | |
| CN108046756A (en) | The method that pressure break ceramsite propping agent is prepared using vanadium titano-magnetite tailings discarding by preconcentration slag | |
| CN114133223A (en) | Energy-saving and environment-friendly low-cost ceramsite proppant and preparation method thereof | |
| CN113277738A (en) | Artificial volcanic rock calcined by using red mud and steel slag as main raw materials and preparation method thereof | |
| KR100392933B1 (en) | Composition for lightweight aggregate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |