CN102718522A - Method for preparing fracturing propping agent by using rejects - Google Patents
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Abstract
The invention provides a method for preparing fracturing propping agent by using rejects. The method comprises the following steps of: mixing gold ore tailings, Pb-Zn slag, aluminum oxide power and reinforcing agent, adding gum water solution, and grinding, so as to obtain mixed mud; and granulating the mixed mud by a pressure type spray granulator, putting granules into an alumina crucible, and sintering, so as to prepare composite propping agent haycite. According to the method, the idea of a composite material is integrated into the incompact haycite propping agent, so that the fiber (the crystal whisker) required for enhancing the strength and the toughness can be provided in a manner of high-temperature reaction self-generation, and the high-strength, high-toughness, low-density and low-damage rate composite propping agent haycite can be prepared by using two means for enhancing the fiber and the granules, and therefore, a product can be used in a medium-deep level fracturing environment, and the final aim of the production increasing of oil gas can be realized.
Description
Technical field
The present invention relates to a kind of method of utilizing waste material to prepare ceramic composite, particularly a kind of method of utilizing rejects to prepare fracturing propping agents.
Background technology
Fracturing propping agents are as an emerging industry, and are not long at China's development time, and its product structure and kind are still far from perfect, and the process scale of industry and level all are in the developmental stage at initial stage.Most of fld belongs to moderate depth, requires fracturing propping agents to have HS, low percentage of damage, to bear the various corrosion in huge pressure in rock stratum and the ground environment.In the world more adopt the alundum goods as in, deep-seated oil gas field fracturing propping agents, though this goods on physicochemical property, can meet the demands, the raw material sources difficulty, complete processing is complicated, and energy consumption is big, cost is high, and its application is restricted.The closed fracturing material of the nonpetroleum deep-well that forms with ceramic sintering method sintering; Be natural siliceous sand, coat in composite particles, glass sphere, the Metal Ball etc., the substitute of low strength propping agent; Have intensity height, low density characteristics, thereby become one of research focus of petrochemical complex material.Current, the subject matter that the fracturing propping agents haydite faces is how under hot conditions, to improve its comprehensive mechanical property through control chemical ingredients and microstructure, effectively reduces the fragility of material, to improve the practical application effect of this material.
Existing propping agent haydite preparation method has meltblown method, organism to coat solidification method, sintering process etc.
Tang Minhui etc. [Research of Support Grains for Oil Well [J]. HarBin Building University's journal; 1995; 28 (4): 73-76] with Irish touchstone be the furnace charge of main raw material preparation,, be developed into pyroxene type microcrystal silicon hydrochlorate pearl body through fusing, special one-tenth pearl and thermal treatment process.The military patent of Zhousheng (characteristics such as application number: 89102544.8) disclose " a kind of Selid propping agent and method of manufacture thereof ", used bauxitic clay to be main raw material, through the balling-up of electric arc furnace meltblown, had the ultimate compression strength height, percentage of damage is low, and the moderate and cost of density is low.Although the propping agent of meltblown method preparation is used in reality to some extent,, prepare ceramsite propping agent with this method and have defectives such as energy consumption is high, balling-up is wayward, proppant strength is low, seldom be used at present.
Organism coat solidification method be with organic binder bond as solidifying agent, be raw material with artificial or natural powder, adhesive solidification is unburned to form, though intensity is low, density is little, has certain characteristics.Sun Hu, Wang Yi send out patent (application number 200710188410) " preparation method of low-density propping agent and preparation technology "; Zhou Fujian patent (application number 201010278084) " a kind of fiber composite sand prevention material and preparation method thereof "; Utilize vegetable fibre or organic fibrous material as raw material respectively, organic curing is unburned forms type or mixes the effect of playing the sand prevention Oil Guide in the fracturing liquid.This series products is not to be proppant in high intensity truly.
Have the investigator to prepare fracturing propping agents with FMS-△ G type, FMS-(R) type resin coating method in addition, its product increases aspect crisp subtracting, but obviously aspect intensity, has defective.
Sintering process is to adopt Ceramic Material and traditional ceramic process to prepare the technology of fine and close ceramsite propping agent.The existing many documents of development and the patent report that prepare the oil fracturing ceramsite propping agent with raw mineral materialss such as bauxitic clays.Gao Haili etc. [development of high-strength petroleum fracturing propping agent [J]. pottery, 2006, (10): 43-46] be main raw material with the local two beach bauxitic clays of Flos Bombacis Malabarici, bauxitic clay raw material and high-titanium blast furnace slag, be developed into high-strength petroleum fracturing propping agent.Patent such as Zhao Shiao, Wu Bailin (application number 201010143771.8), " a kind of preparation method who does not have silicon or low-silicon acidproof ceramic fracturing propping agent "; Patents such as Tian Xiaorang (application number 200710168057) " a kind of preparation method of acid-resistant pressing crack supporting agent "; R. patent such as Dien Ke Er, M. Ai Mengzi (application number 200580030660.3) " sintered spherical pellets " etc. adopts sintering process respectively; With bauxitic clay or aluminum oxide is major ingredient; Add feldspar, titanium oxide or contain barium carbonate or bar fusing assistant; Prepare high-strength low close propping agent, improved the intensity and the acid fastness of material.Sintering process still is the main stream approach for preparing propping agent at present.
Prepare propping agent with sintering process; The major ingredient that adopts is a bauxitic clay, and this is a waste greatly to the fine resource, therefore; With solid waste vast scale substitution of Al alumina cheaply, preparation pressure break ceramsite propping agent is the inexorable trend of home and abroad technical progress and development.This has report on the one hand: Li Qing dimension patent (application number 201010552791.0) " a kind of petroleum propping agent that utilizes the oil shale waste preparation and preparation method thereof " has substituted the part bauxitic clay with oil shale waste and has prepared the propping agent that meets GB.Yin Guoxun etc. [utilize industrial solid wastes such as red mud to prepare haydite [J]. Institutes Of Technology Of He'nan's journal (natural science edition), 2008,27 (4): 491-496].Tian Xiaorang patent (application number 200710137758.X) " utilizes red mud to prepare the method for acid-resistant pressing crack supporting agent ".Open and pass magnesium patent (application number 02134274.1) " ceramic slag haydite and preparation method thereof ".Zhai Guanjie etc. [trial-production of high blending flyash sintering ceramsite [J]. flyash .2008, (1): 42-43] manufactured experimently the high blending flyash sintering ceramsite.Zhang Yujun patent (application number 200910015979.9) " a kind of high-strength compress supporting agent for coarse oil and preparation method thereof " utilizes the petroleum fracturing propping agent of the ceramic rod waste material preparation of high alumina content to have high-strength, acid proof characteristics.
The quality of propping agent haydite performance depends on the internal microstructure of product, to the existing understanding fully of this investigator, and has carried out some useful explorations.Lee accounts for firm patent (application number CN201010136972.5) " low-density ceramic proppant and preparation method thereof "; Change molding mode, utilize the ingenious mode of multilayer cladding, synthetic propping agent with nodular enhancement type of inner core and shell; Product performance have been improved; But molding mode is too complicated, handling not strong, has influenced suitability for industrialized production and the prospect of applying.
At present; Low-density high-strength hangs down the crisp corrosion-resistant main research tendency of propping agent haydite that becomes, and for realizing this goal, in the propping agent prescription, has introduced different high temperature fusing assistants and has optimized the mode of haydite moulding; Improved the mechanical property of propping agent to a certain extent; Improve the acid resistance and the salt tolerance of material, however, still can not fundamentally solve the shortcoming of ceramsite propping agent mechanical property relatively poor (fragility is bigger).
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and means; A kind of depleted slag that both utilized is provided; Improve the chemical constitution of propping agent again, optimize the microstructure of haydite, overcome the brittle method of utilizing rejects to prepare fracturing propping agents of stupalith.
For achieving the above object, preparation method of the present invention is following:
1) gold ore tailing and plumbous zinc ore slag are put into ball mill for dry grinding respectively, cross 120 mesh sieves then respectively;
2) get the gold ore tailing after sieving, plumbous zinc ore slag, aluminum oxide powder, toughener respectively; By the gold mine tailings: plumbous zinc ore slag: aluminum oxide powder: toughener=30%～45%: 10%～15%: 30%～45%: 10%～15% mass percent mix compound and compound is put into ball mill to add mass concentration be 10% gummy aqueous solution mixing wet-milling; Wet-milling is to utilize the alumina balls masonry to be grinding medium; The mass ratio of control abrading-ball, the compound and 10% the gummy aqueous solution is (2～3): 1: (0.3～0.4); Milling time is 0.5h～3h, forms mixing mud, and mud is crossed 300 mesh sieves;
3) mud after will sieving adopts the granulation of press spray tablets press, and the spheroidal particle that granulation forms is crossed 18 orders and 30 mesh sieves, the screenings particle between two sieves is collected waited to burn;
4) particle to be burnt is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1230 ℃ from room temperature with the rate of heating of 5 ℃/min～10 ℃/min; Insulation 0.5h～1h; Rate of heating with 5 ℃/min～7 ℃/min is warming up to 1350 ℃～1400 ℃, and insulation 2h～3h is with taking out behind the stove naturally cooling; Cross 20 orders～40 mesh sieves, promptly get the composite proppant haydite.
Described dry grinding utilizes the alumina balls masonry to be grinding medium, and the mass ratio of control abrading-ball and raw material is (2～3): 1, and difference ball milling 0.5h～2h.
Described sponging granulator EAT is 300 ℃～500 ℃, and hot-blast furnace temperature is 600 ℃～800 ℃, and temperature of outgoing air is 80 ℃～95 ℃, and mud pressure is 1.2MPa～1.5Mpa.
Described aluminum oxide powder is industrial Alpha-alumina (lapis amiridis), its corundum content＞98%, and the powder grain is through＜10 μ m.
Described toughener is a barium carbonate.
By the fracturing propping agents that preparation method of the present invention makes, to form by matrix phase and wild phase two portions, matrix is by quartz, celsian-felspar and glassy phase, pore phase composite; Wild phase is the corundum of grain refining, generated in-situ not Lay stone, zinc silicate fiber phase, and wherein the mass percent of wild phase is 5～15%, and the mass percent of matrix phase is 85～95%.
The present invention is integrated in the theory of matrix material among the ceramsite propping agent of non-densification; Mode with the pyroreaction self-generating provides enhancing toughness reinforcing necessary fiber (whisker); Strengthen the compound propping agent haydite that two kinds of means are prepared high-strength and high ductility, low density and LB rate through fiber reinforcement and particle; Make this product can be applied in, in the profound pressure break environment, realize the final purpose of frscturing; The present invention also utilizes rejects to be major ingredient in addition, with the thinking of " adjustment chemical ingredients+optimization microstructure ", through technological operation simple and easy to control; Introduce or when utilizing the reaction in self-generating to have fibrous crystals; The fine particle that makes fiber and generation is further optimized the concrete grammar that forms fibrous/granular composite ceramic material from the disperse matrix between mutually, will " dual disperse " is technological combines with the Ceramic Composite technology, has both developed the depleted slag; Improve the chemical constitution of propping agent again; Optimize the microstructure of haydite, overcome the fragility of stupalith, be expected to further improve the over-all properties of propping agent ceramsite material.
Description of drawings
Fig. 1 is to be that major ingredient is in the section SEM of 1400 ℃ of sintered specimens figure with the rejects.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Embodiment 1:
1) gold ore tailing and plumbous zinc ore slag are put into ball mill for dry grinding respectively, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and raw material is 2:1, and ball milling 2h crosses 120 mesh sieves then respectively respectively;
2) get the gold ore tailing after sieving, plumbous zinc ore slag, aluminum oxide powder, toughener respectively; By the gold mine tailings: plumbous zinc ore slag: aluminum oxide powder: toughener=30%: 15%: 45%: 10% mass percent mix compound and compound is put into ball mill to add mass concentration be 10% gummy aqueous solution mixing wet-milling; Wet-milling is to utilize the alumina balls masonry to be grinding medium; The mass ratio of control abrading-ball, the compound and 10% the gummy aqueous solution is 2: 1: 0.3; Milling time is 0.5h, forms mixing mud, and mud is crossed 300 mesh sieves;
Described aluminum oxide powder is industrial Alpha-alumina (lapis amiridis), its corundum content＞98%, and the powder grain is through＜10 μ m;
Described toughener is a barium carbonate;
3) mud after will sieving adopts the granulation of press spray tablets press; The sponging granulator EAT is 500 ℃; Hot-blast furnace temperature is 800 ℃, and temperature of outgoing air is 95 ℃, and mud pressure is 1.2Mpa; The spheroidal particle that granulation forms is crossed 18 orders and 30 mesh sieves, the screenings particle between two sieves is collected waited to burn;
4) particle to be burnt is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1230 ℃ from room temperature with the rate of heating of 5 ℃/min; Insulation 0.5h～1h; Rate of heating with 5 ℃/min is warming up to 1400 ℃, and insulation 2h～3h is with taking out behind the stove naturally cooling; Cross 20 orders～40 mesh sieves, promptly get the composite proppant haydite.
Can be found out that by Fig. 1 this material matrix is by celsian-felspar, cristobalite principal crystalline phase and a certain amount of pore phase composite, wild phase is Al
2O
3Phase and Mo Laishi, zinc silicate.This material grains is tiny, is disperse-grain refining structure, and pore is grown, not Lay stone and zinc silicate fiber abrim in the pore.
Table 1 is for being the performance index of major ingredient in 1400 ℃ of prepared fracturing propping agents haydite samples with the rejects.
The performance of 1400 ℃ of prepared fracturing propping agents haydite samples of table 1
Embodiment 2:
1) gold ore tailing and plumbous zinc ore slag are put into ball mill for dry grinding respectively, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and raw material is 2.5: 1, and ball milling 1h crosses 120 mesh sieves then respectively respectively;
2) get the gold ore tailing after sieving, plumbous zinc ore slag, aluminum oxide powder, toughener respectively; By the gold mine tailings: plumbous zinc ore slag: aluminum oxide powder: toughener=45%: 10%: 30%: 15% mass percent mix compound and compound is put into ball mill to add mass concentration be 10% gummy aqueous solution mixing wet-milling; Wet-milling is to utilize the alumina balls masonry to be grinding medium; The mass ratio of control abrading-ball, the compound and 10% the gummy aqueous solution is 2.5: 1: 0.33; Milling time is 3h, forms mixing mud, and mud is crossed 300 mesh sieves;
Described aluminum oxide powder is industrial Alpha-alumina (lapis amiridis), its corundum content＞98%, and the powder grain is through＜10 μ m;
Described toughener is a barium carbonate;
3) mud after will sieving adopts the granulation of press spray tablets press; The sponging granulator EAT is 300 ℃; Hot-blast furnace temperature is 600 ℃, and temperature of outgoing air is 80 ℃, and mud pressure is 1.4Mpa; The spheroidal particle that granulation forms is crossed 18 orders and 30 mesh sieves, the screenings particle between two sieves is collected waited to burn;
4) particle to be burnt is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1230 ℃ from room temperature with the rate of heating of 8 ℃/min; Insulation 0.5h～1h; Rate of heating with 6 ℃/min is warming up to 1350 ℃, and insulation 2h～3h is with taking out behind the stove naturally cooling; Cross 20 orders～40 mesh sieves, promptly get the composite proppant haydite.
Embodiment 3:
1) gold ore tailing and plumbous zinc ore slag are put into ball mill for dry grinding respectively, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and raw material is 3: 1, and ball milling 1.5h crosses 120 mesh sieves then respectively respectively;
2) get the gold ore tailing after sieving, plumbous zinc ore slag, aluminum oxide powder, toughener respectively; By the gold mine tailings: plumbous zinc ore slag: aluminum oxide powder: toughener=40%: 12%: 35%: 13% mass percent mix compound and compound is put into ball mill to add mass concentration be 10% gummy aqueous solution mixing wet-milling; Wet-milling is to utilize the alumina balls masonry to be grinding medium; The mass ratio of control abrading-ball, the compound and 10% the gummy aqueous solution is 3: 1: 0.38; Milling time is 1h, forms mixing mud, and mud is crossed 300 mesh sieves;
Described aluminum oxide powder is industrial Alpha-alumina (lapis amiridis), its corundum content＞98%, and the powder grain is through＜10 μ m;
Described toughener is a barium carbonate;
3) mud after will sieving adopts the granulation of press spray tablets press; The sponging granulator EAT is 400 ℃; Hot-blast furnace temperature is 700 ℃, and temperature of outgoing air is 85 ℃, and mud pressure is 1.3Mpa; The spheroidal particle that granulation forms is crossed 18 orders and 30 mesh sieves, the screenings particle between two sieves is collected waited to burn;
4) particle to be burnt is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1230 ℃ from room temperature with the rate of heating of 6 ℃/min; Insulation 0.5h～1h; Rate of heating with 7 ℃/min is warming up to 1380 ℃, and insulation 2h～3h is with taking out behind the stove naturally cooling; Cross 20 orders～40 mesh sieves, promptly get the composite proppant haydite.
Embodiment 4:
1) gold ore tailing and plumbous zinc ore slag are put into ball mill for dry grinding respectively, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and raw material is 2.3: 1, and ball milling 0.5h crosses 120 mesh sieves then respectively respectively;
2) get the gold ore tailing after sieving, plumbous zinc ore slag, aluminum oxide powder, toughener respectively; By the gold mine tailings: plumbous zinc ore slag: aluminum oxide powder: toughener=35%: 11%: 40%: 14% mass percent mix compound and compound is put into ball mill to add mass concentration be 10% gummy aqueous solution mixing wet-milling; Wet-milling is to utilize the alumina balls masonry to be grinding medium; The mass ratio of control abrading-ball, the compound and 10% the gummy aqueous solution is 2.3: 1: 0.4; Milling time is 2h, forms mixing mud, and mud is crossed 300 mesh sieves;
Described aluminum oxide powder is industrial Alpha-alumina (lapis amiridis), its corundum content＞98%, and the powder grain is through＜10 μ m;
Described toughener is a barium carbonate;
3) mud after will sieving adopts the granulation of press spray tablets press; The sponging granulator EAT is 350 ℃; Hot-blast furnace temperature is 650 ℃, and temperature of outgoing air is 90 ℃, and mud pressure is 1.5Mpa; The spheroidal particle that granulation forms is crossed 18 orders and 30 mesh sieves, the screenings particle between two sieves is collected waited to burn;
4) particle to be burnt is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1230 ℃ from room temperature with the rate of heating of 10 ℃/min; Insulation 0.5h～1h; Rate of heating with 5 ℃/min is warming up to 1360 ℃, and insulation 2h～3h is with taking out behind the stove naturally cooling; Cross 20 orders～40 mesh sieves, promptly get the composite proppant haydite.
The present invention is a major ingredient with the rejects, utilizes pyroreaction, the fibrous 3Al of original position self-forming
2O
32SiO
2Mo Laishi and ZnSiO
4The matrix material of granular dispersion consolidatedization of crystal in zinc silicate crystal and the porcelain body; Not only have cheap for manufacturing cost; And fibrous not Lay stone has bigger specific surface area and surface energy relies on strong crystal boundary power to combine with granular corundum, cristobalite, celsian ceramics matrix, and fibrous crystals is distributed between corundum, cristobalite, the celsian-felspar particle on the one hand, forms the fiber/particle disperse structure; On the other hand; Synthetic corundum crystal tool " grain refining " structure, even dispersion crystal such as cristobalite, celsian-felspar around, formed the stack of particle/particle secondary disperse." dual disperse " caused the formation of fiber/granular compound disperse structure, effectively improved the microstructure of porcelain body, intensity and the toughness that improves porcelain body played conclusive effect, thereby the over-all properties of this material is greatly improved.
In the ceramsite propping agent prescription, introduce and at high temperature fully to react the chemical composition that forms fibrous crystals; With it as necessary initial feed; Make fibrous crystals and new formation between the granular crystal through pyroreaction, synthesized " dual disperse " microstructural matrix material.Because each different under uniform temp, environment and condition, forming mutually; Cause fiber reinforcement and particle to reach mutually between the pore phase and have good stress consistency and wettability; Effectively improve and optimized the microstructure of haydite, this comprehensive mechanical performance is significantly improved.
The present invention prepares petroleum fracturing propping agent with gold ore tailing and two kinds of rejects of plumbous zinc ore tailings as major ingredient.Waste residue is the inevitable waste that produces in the ore dressing process, has a large capacity and a wide range, and its profile is that the fine-grained powder powder is semi-solid, and fineness is generally at 70 orders-160 order, and discharging is piled up loose, does not obtain good development and utilization at present.According to the geologic feature of domestic gold mine output, gold mine waste residue essential mineral is main with quartzy (30%～60%), pyrite (5%～20%), plagioclase (10%～30%), potassium felspar sand (15%～30%), sericite (5%～15%).Plumbous zinc ore slag essential mineral is main with quartzy (30%～45%), potassium felspar sand (10%～20%), pyrite (15%～20%), limonite (5%～10%), rhombspar (5%～10%), diopside (5%～10%), tiff (5%～10%), contains components such as a certain amount of Cu, Cd, Hg, Ni, As in addition.Rejects both provided pyroreaction necessary component, had played the effect of high temperature composite fluxing agent again.Tailings embodies on composition: the characteristics of high silicon, low aluminium, high ferro, potassium, sodium, and in the characteristic that shows lower melting point in nature, efficiently fluxes.The main source of mullite fiber is the SiO in the waste residue under the high temperature
2With the Al in the aluminum oxide powder
2O
3Reaction forms mullite cylinder or fiber, SiO
2Reaction can form fibrous zinc silicate crystal with ZnO, and fiber phase/particle phase/pore has constituted the microstructure of disperse attitude mutually.Non-α-Al
2O
3Be transformed into the particulate corundum of wild phase, the corundum wild phase also be thin crystalline substance-disperse attitude be distributed in celsian-felspar, cristobalite around, formed the microstructure of dual disperse.The generation of corundum and mullite has been played conclusive effect to proppant strength, and tiff and barium carbonate have been participated in SiO
2, Al
2O
3, BaO building-up reactions form celsian-felspar, both improved the intensity of haydite and the ability of acid-alkali-corrosive-resisting, reduced the withstand voltage percentage of damage of propping agent again, on the other hand flux component K in the waste residue
2O, Na
2O, CaO, MgO, Fe
2O
3, TiO
2And other trace element etc.; Can effectively reduce the low eutectic point of compound; The propping agent sintering temperature is reduced; And with a spot of glassy phase that other component interactions form, be filled in because of pyroreaction and emit gas or crystalline form transforms in the formed pore of volumetric expansion, the raising of the intensity that improves propping agent has been played has effectively been replenished.
The present invention utilizes rejects, aluminium vanadine, toughener through sintering process; Synthetic simultaneously through pyroreaction in matrix phase and wild phase; And make matrix phase " grain refining ", " disperseization ", wild phase and matrix mutually once more " disperse ", dual disperse has prepared the composite proppant haydite.Because this material combines the advantage of grain refining stupalith and filamentary material; And make pore wherein also be disperse attitude uniform distribution mutually; The intensity and the toughness of haydite have been increased on the one hand; Effectively reduce the density and the breakage rate of material on the other hand, make this comprehensive mechanical performance obtain further raising.In addition, on raw material, introduce rejects cheaply in a large number, reduced firing temperature, in burning till fast, realized grain refining and disperseization, reduced production cost simultaneously.The present invention does not change existing technology, does not increase any equipment, and the technical indicator of its product and use properties meet oil and gas industry standard SY/T5108-2006 " fracturing propping agents performance index and evaluation test method " fully.
The present invention prepares compound petroleum fracturing propping agent with rejects as major ingredient; Not only can bring into play waste residue fine size, high silicon, low aluminium, iron, titanium, potassium, sodium component content is big; Obvious results advantage that fusing point is low, high temperature is fluxed; Can also make the granular crystal of existing high-intensity disperse attitude (celsian-felspar, cristobalite, corundum) in the petroleum fracturing propping agent through processing condition control pyroreaction, have again to strengthen toughness reinforcing fibrous crystals (Mo Laishi, zinc silicate); The two presents disperse-thin brilliant orderly microtexture, thus effectively improve propping agent intensity and acid fastness, reduce its percentage of damage.Form the proppant material of excellent performance.
Effect of the present invention is embodied in:
(1) main raw material of the present invention is a rejects, prepares fracturing propping agents with waste residue and not only helps to practice thrift natural resource, reduces production costs, and also helps environment protection.
(2) the rejects raw material is mainly micron-size spherical particles, compares with natural mineral, and raw material need not to use high-power crusher in crushing, and batch mixing is even between the each component, has reduced the mass energy consumption that the raw material ball milling is produced effectively.
(3) to have high silicon, low aluminium, iron, titanium foreign matter content big for the performance of the chemical constitution of waste residue and character, and obvious results characteristics that fusing point is low, high temperature is fluxed both provided necessary SiO in the pyroreaction
2, Al
2O
3, ensured antiflux component K again
2O, Na
2O, Fe
2O
3, TiO
2, CaO, MgO etc., reduce production cost.
(4) theory with matrix material is guidance; When adopting rejects in a large number, introduce the compound enhancing toughner of barium carbonate, make the granular/granular-crystalline structure of existing high-intensity disperse in the petroleum fracturing propping agent-thin crystalline state; The crystalline structure that strengthens toughness reinforcing fiber/granular disperseization is arranged again; Thereby effectively improved the microstructure of porcelain body, improved the intensity and the acid-resistant corrosion of propping agent, reduced its percentage of damage.
(5) the fracturing propping agents intensity of preparation can reach 85MPa～120MPa, has intensity height, light weight, good characteristic such as high temperature resistant, corrosion-resistant, in can be used as, the fracturing propping agents of deep-seated oil gas field.
Claims (6)
1. method of utilizing rejects to prepare fracturing propping agents is characterized in that:
1) gold ore tailing and plumbous zinc ore slag are put into ball mill for dry grinding respectively, cross 120 mesh sieves then respectively;
2) get the gold ore tailing after sieving, plumbous zinc ore slag, aluminum oxide powder, toughener respectively; By the gold mine tailings: plumbous zinc ore slag: aluminum oxide powder: toughener=30%～45%: 10%～15%: 30%～45%: 10%～15% mass percent mix compound and compound is put into ball mill to add mass concentration be 10% gummy aqueous solution mixing wet-milling; Form mixing mud, mud is crossed 300 mesh sieves;
3) mud after will sieving adopts the granulation of press spray tablets press, and the spheroidal particle that granulation forms is crossed 18 orders and 30 mesh sieves, the screenings particle between two sieves is collected waited to burn;
4) particle to be burnt is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1230 ℃ from room temperature with the rate of heating of 5 ℃/min～10 ℃/min; Insulation 0.5h～1h; Rate of heating with 5 ℃/min～7 ℃/min is warming up to 1350 ℃～1400 ℃, and insulation 2h～3h is with taking out behind the stove naturally cooling; Cross 20 orders～40 mesh sieves, promptly get the composite proppant haydite.
2. the method for utilizing rejects to prepare fracturing propping agents according to claim 1 is characterized in that: described dry grinding utilizes the alumina balls masonry to be grinding medium, and the mass ratio of control abrading-ball and raw material is (2～3): 1, and difference ball milling 0.5h～2h.
3. the method for utilizing rejects to prepare fracturing propping agents according to claim 1; It is characterized in that: described sponging granulator EAT is 300 ℃～500 ℃; Hot-blast furnace temperature is 600 ℃～800 ℃, and temperature of outgoing air is 80 ℃～95 ℃, and mud pressure is 1.2MPa～1.5Mpa.
4. the method for utilizing rejects to prepare fracturing propping agents according to claim 1; It is characterized in that: described wet-milling is to utilize the alumina balls masonry to be grinding medium; The mass ratio of control abrading-ball, compound and the gummy aqueous solution is (2～3): 1: (0.3～0.4), milling time are 0.5h～3h.
5. the method for utilizing rejects to prepare fracturing propping agents according to claim 1 is characterized in that: described aluminum oxide powder is industrial Alpha-alumina (lapis amiridis), its corundum content＞98%, and the powder grain is through＜10 μ m.
6. the method for utilizing rejects to prepare fracturing propping agents according to claim 1 is characterized in that: described toughener is a barium carbonate.
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| CN105860953A (en) * | 2016-04-14 | 2016-08-17 | 东北大学 | Oil fracturing propping agent and preparation method thereof |
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| CN116177883A (en) * | 2023-02-22 | 2023-05-30 | 四川君和环保股份有限公司 | High-strength ceramsite fracturing propping agent and preparation method thereof |
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