754 results about "Petroleum coke" patented technology

The invention relates to the technical field of chemical raw material processing, and discloses a petroleum coke particle size grading and batching system which comprises a raw material pretreatment module, a multi-stage dynamic screening module, a particle size real-time monitoring module, an intelligent batching decision module and a closed-loop control execution module. The classification definiteness of materials with different particle sizes is ensured; meanwhile, through a particle size monitoring feedback mechanism, the particle size distribution abnormal state in the screening process is recognized in real time, the material purity within the target particle size range is guaranteed, the particle size grading accuracy is improved, a closed-loop matching decision module is arranged, particle matching weight parameters are dynamically optimized in combination with the electrolytic aluminum process requirement, and the particle size grading accuracy is improved. The deviation degree between the ingredient proportion and the target performance can be judged in real time; the speed ratio of the conveying belt and the opening degree of the stock bin are automatically corrected through the executing mechanism, it is guaranteed that the mixing proportion of coarse particles, medium particles and fine particles is always in the optimal interval matched with electrolytic aluminum anode production, and the quality stability of anode carbon blocks is improved.

The invention discloses a yellow phosphorus furnace electrode paste and a preparation method thereof, and belongs to the technical field of yellow phosphorus furnace production, the yellow phosphorus furnace electrode paste comprises the following raw materials by mass: 55-65% of anthracite particles, 20-25% of petroleum coke, 5-10% of graphite chips, 18-25% of a composite binder, 0.3-1.5% of a composite antioxidant and 1.5-4.5% of an additive; the yellow phosphorus furnace electrode paste provided by the invention is produced according to the preparation method provided by the invention, and the resistivity, compressive strength and oxidation resistance can be synchronously improved through the design of carbon material multistage particle size distribution, a nano-reinforced composite binder and a synergistic anti-oxidation system in combination with an efficient drying and densification process; the problem that an existing electrode paste is poor in density and performance is effectively solved.

A method for producing hydrocarbon fluids via a hydrocarbon well comprises providing petroleum coke proppant particles having an Amott index for oil of at least 0.02, an Amott index for water of at most 0.1, and a pseudo Amott index of at most 0.35. The method also comprises, for each of a number of stages of the hydrocarbon well, introducing a fracturing fluid comprising a carrier fluid and the petroleum coke proppant particles into a subterranean formation via a wellbore of the hydrocarbon well and then producing hydrocarbon fluids from the subterranean formation via the wellbore of the hydrocarbon well.

The invention relates to the technical field of lithium ion batteries, and provides a preparation method of a silicon-carbon composite material and a lithium ion battery containing the composite.The preparation method of the silicon-carbon composite material comprises the steps that petroleum coke porous carbon is prepared; the method comprises the following steps: performing vapor deposition doping on petroleum coke porous carbon in a fluidized bed in a protective atmosphere to obtain an intermediate material; mixing the intermediate material with a liquid carbon material, transferring the mixture into a rotary furnace, and carrying out secondary granulation treatment; and carrying out passivating treatment on the material subjected to secondary granulation to obtain the silicon-carbon composite material. The characteristics of high anisotropy and high strength of the petroleum coke matrix are utilized, the impedance is reduced, the compaction density is improved, expansion is reduced, the cycle performance is improved, gas production is reduced through secondary granulation, the electronic conductivity and the coating integrity of the silicon-carbon composite material are improved through passivation, and the service life of the silicon-carbon composite material is prolonged. Therefore, the rate capability and high-temperature storage of the silicon-carbon composite material are improved.

A fracturing fluid comprises a carrier fluid and coke particles. The coke particles include microproppant coke particles (e.g., petroleum coke fines) having particle sizes of at most 105 μm, where the microproppant coke particles have a total concentration of at least 3 wt % based on the total weight of the coke particles. The coke particles also have a total concentration in the fracturing fluid from 14 kilograms per cubic meter to 480 kilograms per cubic meter, based on the volume of the carrier fluid. A method includes introducing such fracturing fluid into a subterranean formation.

The invention relates to the technical field of industrial wastewater treatment, and discloses an efficient two-stage reverse osmosis petroleum coke water treatment system, which comprises pretreatment execution ends, a reverse osmosis core end, a concentration regeneration end and an intelligent control end which are commonly configured with a data feedback module. A step-by-step mechanism is established at the initial stage of wastewater treatment, quartz sand is adopted to intercept large-particle suspended solids, activated carbon is adopted to adsorb and degrade organic matters, softening resin is adopted to replace and remove scaling ions, ozone is adopted to catalyze, oxidize and decompose refractory pollutants, an oxidation-reduction potential dynamic regulation and control mechanism is innovatively introduced, and the dosage of an oxidizing agent is automatically regulated according to water quality and chemical quality; by means of the design, the blocking problem caused by high-hardness waste water is solved, the membrane is prolonged, the solution period is stably solved, the chemical cleaning frequency and agent consumption are reduced, a pollution early warning and closed response linkage mechanism is constructed, membrane damage caused by manual intervention delay is avoided, and the service life of membrane elements is prolonged and reduced.

The invention relates to the technical field of petroleum coke crushing, and provides a crusher for calcined petroleum coke processing, the crusher comprises a support frame, the rear side surface of the support frame is fixedly connected with a feeding barrel, the upper surface of the feeding barrel is fixedly connected with a feeding pipe, and the rear side surface of the feeding barrel is rotatably connected with a screw rod; a long transmission rod is fixedly connected to the outer surface of the lead screw, an inner screen drum is fixedly connected to the end, away from the lead screw, of the long transmission rod, a short transmission rod is fixedly connected to the outer surface of the inner screen drum, an outer screen drum is fixedly connected to the end, away from the inner screen drum, of the short transmission rod, and a limiting sleeve is fixedly connected to the outer surface of the lead screw. By means of the technical scheme, the petroleum coke screening device solves the problems that in the prior art, petroleum coke is prone to being clamped on a screen in the conveying and screening process, blockage is caused, the screening efficiency is low, the device is prone to being damaged, and the overall working efficiency is affected.

The invention provides a method and system for utilizing flue gas generated after petroleum coke calcination, and belongs to the field of aluminum electrolysis and aluminum carbon. The method comprises the following steps: collecting high-temperature flue gas discharged after calcining petroleum coke; the high-temperature flue gas is subjected to heat exchange treatment, and low-temperature flue gas with the set temperature is obtained; low-temperature flue gas is used as a heat source, the wet-based petroleum coke is heated and dried, and dry-based petroleum coke with a set water value is obtained; and calcining the dry-based petroleum coke, and circularly using flue gas collected by calcining for heating and drying the wet-based petroleum coke to form a closed cycle. High-temperature flue gas obtained after calcination is subjected to heat exchange to form low-temperature flue gas, the low-temperature flue gas is used for drying wet-based petroleum coke, a flue gas circulation system is formed, and multi-stage utilization of waste heat is achieved. Meanwhile, the dried petroleum coke can reduce energy consumption required by water evaporation during calcination, and erosion of water vapor to a hearth refractory material is avoided. Therefore, the negative influence of petroleum coke moisture on the heat efficiency is reduced while the waste heat utilization rate after petroleum coke calcination is improved.

The invention relates to the technical field of waste gas treatment, in particular to a waste gas collection and treatment device for petroleum coke calcination and a method thereof.The waste gas collection and treatment device comprises a bottom plate, the bottom plate comprises a gas inlet pipe arranged above the bottom plate, and a gas pump device is fixedly installed in the gas inlet pipe and electrically connected with a controller; the waste gas treatment assembly comprises a plurality of filter cartridges which are longitudinally arranged above the bottom plate, conical lifting ring plates are elastically and slidably mounted in the filter cartridges, and activated carbon particles are filled in the filter cartridges and on the upper end surfaces of the conical lifting ring plates. Through series connection design of multiple layers of filter cartridges, activated carbon particles are automatically blown up in the waste gas flowing process, a dynamic adsorption layer is formed, the effective contact area of activated carbon is increased, the conical lifting annular plate is matched with the pressure detection element, the activated carbon adsorption quantity change is automatically detected, a regeneration program is triggered in time, and manual intervention delay is avoided.

The invention relates to the technical field of aluminum electrolysis carbon anodes, in particular to a prebaked carbon anode with high conductivity and oxidation resistance and a preparation method of the prebaked carbon anode. The raw materials of the prebaked carbon anode comprise dry materials with multiple particle sizes and a binder, and the total weight m1 of the dry materials with multiple particle sizes and the weight m2 of the binder meet the relational expression: m1: m2 = (82: 18)-(88: 12); wherein the raw materials of the dry material comprise calcined petroleum coke with multiple granularities and conductive carbon materials with multiple granularities, and the calcined petroleum coke and the conductive carbon materials meet the following relational expressions: m3: m4 = (80-95): (5-20), and m31: m42 = m3: m4. According to the prebaked carbon anode, the conductivity and the oxidation resistance can be synchronously improved.

A repairing agent and repairing method for a graphite crucible. The repairing agent is a two-component repairing agent and comprises an interface repairing agent and a surface layer repairing agent. The interface repairing agent is prepared by taking graphite powder, paraffin oil, asphalt powder, pyridine, and an SiC-Y2O3 slurry as raw materials, and the surface layer repairing agent is prepared by taking petroleum coke powder, graphite powder, asphalt powder, and a resin material as raw materials. The corresponding graphite crucible repairing method relates to using a repairing agent as a tool to repair a damaged area of a damaged graphite crucible; during repairing of the damaged graphite crucible, coating the damaged area of the damaged graphite crucible with an interface repairing agent; after the coating is completed, covering the coating area by an aluminum foil, wrapping with a glass fiber mesh, performing pre-curing treatment, and using a surface repairing paste to finally complete the repairing operation of the graphite crucible. The repairing agent and the repairing method have a good repairing effect on the damaged graphite crucible and can be used to prolong the service life of the damaged graphite crucible.

The invention provides a high-performance S < iC > composite material and a preparation method thereof, and the high-performance S < iC > composite material is prepared from the following components in parts by mass: 20-35 parts of industrial grade alpha-SiC powder, 10-14 parts of petroleum coke powder, 4-9 parts of short carbon fiber, 2-6 parts of T < iC > powder, 1-4 parts of sintering aid, 2-7 parts of PMMA microspheres, 4-11 parts of NaCl particles and 1-3 parts of polyvinyl alcohol. In the preparation process of the SiC composite material, full-chain innovation of one-step sintering and low-temperature precise post-treatment is adopted, perfect combination of low cost, high performance, high stability and green manufacturing is achieved, and the long-term bottlenecks of a traditional S-C composite material in the aspects of cost, performance, processing defects and the like are solved.

The invention provides a method for recovering Si, C and TiO2 based on chlorinated waste salt water quenching slag, which comprises the following steps: sequentially carrying out water quenching dissolution, precipitation separation and filter pressing dehydration treatment on chlorinated waste salt to obtain water quenching slag and supernate; adding a dilute acid solution into the water-quenched slag, dissolving, and adding a reducing agent for reaction to obtain slurry; carrying out solid-liquid separation on the slurry to obtain a solid material and filtrate; the filtrate is pumped into a boiling bed separator, the petroleum coke and TiO2 are intercepted by a medium material layer, clear liquid is discharged, then the medium material layer is subjected to backwashing regeneration, and the desorbed petroleum coke and TiO2 are subjected to graded enrichment by a hydrocyclone, so that petroleum coke slurry and TiO2 slurry are obtained. According to the method, TiO2, C and other resources in the water-quenched slag obtained after molten salt chlorination waste salt water quenching are recycled, and the technical problem that in the existing chlorination waste salt resourceful treatment process, Si, C, TiO2 and other resources in the water-quenched slag are wasted is solved.

The invention provides a petroleum coke drying and calcining system, which belongs to the technical field of tar treatment and comprises a feeding bin, a waste heat rotary drying furnace, a calcining furnace, a slag cooler, a receiving bin and a tail gas incineration chamber connected with the calcining furnace. The green petroleum coke raw material is fed into a waste heat rotary drying furnace to be dried; a drying furnace water vapor outlet, a drying furnace smoke outlet and a drying furnace waste heat tail gas inlet are formed in the waste heat rotary drying furnace; high-temperature tail gas generated by calcining and volatilizing materials in the calcining furnace enters the tail gas incineration chamber through the calcining furnace tail gas volatilization opening, and high-temperature tail gas generated by mixed combustion of the high-temperature tail gas and fuel gas entering the tail gas incineration chamber enters the calcining furnace and reversely flows with the materials in the calcining furnace to calcine the materials in the calcining furnace, so that primary utilization of the tail gas is realized. The high-temperature tail gas is calcined to absorb heat to form low-temperature tail gas, and the low-temperature tail gas enters the waste heat rotary drying furnace to dry materials, so that secondary utilization of the tail gas is realized, and the problems of low integration degree, high production cost and low treatment efficiency are solved.

The invention provides an antioxidant graphite material and a preparation method thereof. The preparation method of the anti-oxidation graphite material comprises the following steps: mixing an ester compound containing a boron element with a binder coal pitch, heating and kneading the mixture and coke aggregate (pitch coke or petroleum coke) to form a pasty material, cooling the pasty material, preparing pressed powder, performing isostatic compaction, roasting and graphitizing to obtain the anti-oxidation graphite material. The whole technical route is the same as a large-scale graphite production process of an enterprise and can be directly combined with an existing production process, and the aim of improving the graphitization degree so as to improve the oxidation resistance of the graphite can be achieved without increasing procedures and production cost. Boron and boron in the boron-containing solvent can be distributed in the bulk phase of graphite and reduce the number and reaction activity of carbon active sites, so that the boron-containing solvent is an intrinsic oxidation inhibitor, and the inhibition effect of the bulk phase cannot be affected even if surface loss is caused by abrasion or corrosion.

Proppant particulates like sand are commonly used in hydraulic fracturing operations to maintain one or more fractures in an opened state following the release of hydraulic pressure. Fracturing fluids and methods of hydraulic fracturing may also use proppant particulates composed of petroleum coke material. Such proppant particulates may have improved transport into fractures because of lower density than traditional proppants like sand and may produce fewer fines that reduce fluid flow through proppant packs. The proppant particulates of the present disclosure are composed of thermally post-treated delayed coke and exhibit mechanical properties comparable to fluid coke and flexicoke petroleum coke materials for use as proppant particulates.

The invention relates to the technical field of dust suppression, and discloses petroleum coke blending dust suppression and recovery equipment which comprises a machine shell and a plurality of pulse guns, a partition plate is fixedly arranged in the machine shell, and an inner cavity of the machine shell is divided into a dust collection cavity and a clean cavity by the partition plate; the driving piece is used for controlling the turning plate to close the square groove in the pulse dust cleaning stage, so that dust falling from the outer wall of the filter cartridge is guided to the dust collection cavity along the inclined plate; and the turning plate is controlled to open the square groove in a non-deashing filtering stage, so that dust-containing gas enters the external space of the filter cartridge through the square groove. An inclined plate is arranged below each layer of filter cartridge, and a turning plate controlled by a driving piece is arranged on each inclined plate. The equipment opens the turning plate in the filtering stage to enable airflow to pass through, and closes the turning plate below the ash removal layer in the pulse ash removal stage to form physical isolation. And dust falling from upper-layer dust removal is thoroughly prevented from falling onto the surface of the lower-layer filter cartridge. The service life of the filter cartridge is obviously prolonged and the maintenance frequency and energy consumption are reduced.

The invention discloses high-power artificial graphite as well as a preparation method and application thereof, and belongs to the technical field of new energy. The invention discloses a preparation method of high-power artificial graphite, which comprises the following steps: S1, mixing a carbon-based raw material, phenolic resin and a pore-forming agent in an organic solvent, and graphitizing; the carbon-based raw material comprises at least one of petroleum coke powder, needle coke powder and pitch coke powder; the pore-forming agent comprises at least one of alkali metal nitrates; s2, dipping a product obtained in the step S1 in a solution containing graphene quantum dots, and drying; 3, adopting a CVD (chemical vapor deposition) method to generate graphene on the product obtained in the step S2 in situ; and S4, coating the surface of the product obtained in the step S3 with a carbon layer. According to the preparation method provided by the invention, the high-power use stability of the artificial graphite can be effectively improved. The invention also provides the high-power artificial graphite prepared by the preparation method and application of the high-power artificial graphite.

The invention discloses a preparation method of high-rate fast-charging graphite from a semi-calcined coke raw material, and belongs to the technical field of batteries, and the preparation method comprises the following steps: S1, crushing and shaping the semi-calcined coke raw material; s2, carrying out graphitization high-temperature treatment on the crushed and shaped semi-calcined coke; s3, mixing and coating the semi-calcined coke subjected to graphitization high-temperature treatment with a coating agent; s4, performing high-temperature carbonization heat treatment on the semi-calcined coke mixed and coated with the coating agent; s5, screening the petroleum coke semi-calcined coke subjected to high-temperature carbonization heat treatment to obtain a semi-calcined coke raw material high-rate fast-charging graphite; the material has the advantages of large discharge capacity, good cycle performance, good electrochemical performance, high discharge plateau and plateau retention rate, good large-current charge-discharge performance, good safety, good adaptability to electrolyte and other additives, stable product properties, almost no difference between batches, simple and feasible preparation method, and suitableness for industrial production.

When potassium hydroxide (KOH) or other activating agents are used to activate carbon, the hydrochloric acid used to remove it may damage the stainless steel equipment used in the process. Herein, water and citric acid are used to wash the carbon after its activation to reduce damage to the equipment. Prior to activation, a slurry of coal, petroleum coke or other carbonaceous material mixed with water and KOH is dried in layers. During drying, the KOH repeatedly precipitates as a crust on the layers and is repeatedly blended back into the mixture. Activation temperature and duration may be selected to control the pore size distribution in the activated carbon.

The invention belongs to the technical field of petroleum coke production, and particularly relates to a production process of petroleum coke for an aluminum smelting anode, which comprises the following steps: a raw material intelligent analysis stage: performing deep analysis on key impurity elements such as sulfur, calcium, sodium, vanadium and the like on green petroleum coke from various sources by adopting an advanced artificial intelligence algorithm in combination with a high-precision spectral analysis technology to obtain a crude petroleum coke sample; accurate identification and classification of raw material components are realized; and a dynamic ratio optimization stage: based on the raw material analysis result, dynamically adjusting the petroleum coke mixing ratio by using a machine learning model, and by introducing an advanced artificial intelligence algorithm, a high-precision spectrum analysis technology and the machine learning model, accurate identification and dynamic ratio optimization of raw material components are realized. Therefore, the utilization rate of the raw materials is remarkably improved, and accurate control of the content of key impurity elements in the mixed dry material is ensured, so that the comprehensive performance of the anode material is improved.

The utility model discloses a screening device for calcined petroleum coke, which belongs to the technical field of calcined petroleum coke and comprises a screening box, two partition plates are arranged in the screening box, three groups of screening net cylinders are arranged in the screening box, and the diameters of screening holes of the three groups of screening net cylinders are sequentially increased. A dust cleaning and collecting mechanism is arranged at the top of the screening box, and a constant-speed feeding mechanism is arranged in the middle of the screening box. In the process, the dust cleaning and collecting mechanism is arranged, and in the process, a negative pressure state is formed in a collecting tank through a negative pressure fan; and at the moment, dust in the screening box is adsorbed and collected into the collecting tank through the cleaning pipe and the vertical pipe, so that the dust generated in the screening process of the petroleum coke can be collected and treated, air pollution caused by dust floating is avoided, meanwhile, the collected dust can be recycled, and the screening effect on the petroleum coke is improved.

The invention relates to a semiconductor device manufacturing technology, and aims to provide a preparation method of refined coke powder and high-purity isostatic pressing graphite. The method comprises the following steps: by taking calcined petroleum coke or calcined pitch coke as a raw material, crushing and grinding to obtain primary coke powder, then carrying out high-temperature halogen impurity removal treatment in a continuous heating manner, and introducing Freon gas in the process; cooling to obtain impurity-removed coke powder; and carrying out dispersion, grinding, shaping treatment, airflow classification and magnetic separation to obtain refined coke powder. According to the method, the impurity content is greatly reduced from the raw material end, the situation that a large number of metal impurities generated during smashing and grinding treatment cannot be eliminated in the graphitization process due to the fact that the metal impurities are located below the surface layer of a blank can be avoided, and the internal impurity content of a final graphite product is smaller than 20 ppm; higher tap density can be obtained, and a better mixing and kneading effect is realized; the porosity of an isostatic pressing graphite product can be reduced, the microstructure of a graphite material is effectively improved, and the corrosion resistance of the graphite material is effectively improved.

The invention provides a prebaked anode with high compressive strength. The prebaked anode comprises the following raw materials: 68-85 parts by mass of calcined petroleum coke particles; 12-25 parts by mass of a modified coal pitch binder, wherein the softening point of the modified coal pitch binder is 105-115 DEG C; and 0.3-0.8 part by mass of a whisker reinforcing agent. The production process comprises the following steps: calcining, crushing and grading, modifying fine powder, preparing a binder, mixing and kneading, forming and roasting. The prebaked anode has the advantages that through multi-stage material collaboration and process innovation, under the condition that an existing production line is not changed at all, the core contradictions that the prebaked anode is insufficient in strength, poor in conductivity and poor in high-temperature stability are synchronously solved.

The invention relates to the technical field of lithium ion batteries, and discloses a carbon negative electrode material precursor and a preparation method and application thereof, a carbon negative electrode material and a preparation method and application thereof, and a lithium ion battery. The carbon negative electrode material precursor comprises first petroleum coke (a1, k1), second petroleum coke (a2, k2) and third petroleum coke (a3, k3), and a1, a2 and a3 respectively represent the total content of large sheets and fiber structures in anisotropic structures of scorched particles; k1, k2 and k3 respectively represent the length-width ratio of the scorched particles; the first petroleum coke meets the following conditions: 75% < = a1 < 90%, and 1.7 < = k1 < 1.9; the second petroleum coke satisfies the following conditions: 65% < = a2 < 80%, and 1.5 < = k2 < 1.7; and the third petroleum coke satisfies the following conditions: 40% < = a3 < 60%, and 1 < = k3 < 1.3. By adopting the carbon negative electrode material precursor disclosed by the invention, the subsequently prepared carbon negative electrode material has relatively high specific capacity and rate capability.

The invention relates to the technical field of submerged arc furnaces, in particular to a preparation method of a bottom electrode of a direct-current submerged arc furnace and the direct-current submerged arc furnace. The preparation method of the bottom electrode of the direct-current submerged arc furnace comprises the steps that petroleum coke and pitch coke are evenly mixed and then smashed into the three-level particle size, a binder is added, bidirectional compression molding is conducted at the preset temperature, and the bottom electrode of the direct-current submerged arc furnace is obtained; meanwhile, mechanical vibration with the preset frequency is applied, the pressure gradient is gradually increased, pressure maintaining is conducted for the first duration, and a formed blank is obtained; carrying out gradient roasting on the molded green body and carrying out heat preservation for a second time to obtain a graphitized electrode green body; and immersing the graphitized electrode blank into the modified asphalt of the dipping tank, carrying out vacuum pressurization and pressure maintaining, and then directly transferring the electrode blank to the bottom of the direct current submerged arc furnace for secondary roasting to obtain the bottom electrode of the direct current submerged arc furnace. The heat control and anti-scouring performance of the bottom electrode of the direct-current submerged arc furnace is optimized.

The invention relates to a high-grade waste heat recovery device for high-temperature calcined petroleum coke. The waste heat recovery device comprises a mounting frame, a waste heat recovery furnace and a first cleaning mechanism, and an air inlet pipe, an air inlet bin, a heat exchange pipe, an air outlet bin and an air outlet pipe which are sequentially communicated in the hot air flowing direction are arranged in the heat recovery furnace; the first cleaning mechanism comprises a movable magnetic ring, a first driving mechanism and a magnetic cleaning scraping block; the first driving mechanism can drive the movable magnetic ring to move back and forth in the extending direction of the heat exchange pipe. The magnetic cleaning scraping block is attracted by the magnetic attraction force of the movable magnetic ring to move along with the movable magnetic ring, and the magnetic cleaning scraping block is located in the heat exchange pipe and abuts against the inner wall of the heat exchange pipe, so that the magnetic cleaning scraping block moves in the heat exchange pipe and can remove impurities in the pipeline from the heat exchange pipe through collision. And therefore, the influence of impurities in the pipeline on the heat transfer efficiency of the heat exchange pipe is avoided, and the high efficiency of waste heat recovery is guaranteed.

The invention discloses a method for preparing high-strength aluminum alloy through regeneration of waste 7-series aluminum alloy and application of the method, and belongs to the technical field of aluminum alloy recovery. The method comprises the following steps: (1) cleaning the waste 7-series aluminum alloy; (2) mechanically crushing to obtain waste chips with the thickness of less than or equal to 2mm and the width of less than or equal to 10mm; (3) the waste scraps, petroleum coke (2-4 wt.%) with the average particle size smaller than 50 nm and metal elementary substance powder are mixed and subjected to ball milling, the Zn content ranges from 5.2% to 11.8%, and the Zn / Mg ratio ranges from 2.5 to 3.0; and (4) the composite material powder is extruded, forged and the like. Through the alloying control effect of the nano petroleum coke, regulation and control of oxidation layer breaking and strengthening phase precipitation are achieved, and the yield strength of the regenerated aluminum alloy reaches 934 MPa and the tensile strength reaches 987 MPa in combination with the dispersion strengthening and thermal mismatch effects. The method solves the problem of grade preservation and regeneration of the 7-series aluminum alloy waste, has the advantages of precise and controllable components, simple process, low cost and the like, and is suitable for manufacturing high-strength aluminum alloy parts in the fields of aerospace, rail transit and the like.

The invention belongs to the field of carbon product production, and particularly relates to special graphite for ion implantation and a preparation method thereof, and the special graphite is composed of aggregate coke, an additive and a binder; the aggregate coke comprises at least one of low-ash petroleum coke, pitch coke, pitch coke green coke, needle coke and artificial high-purity graphite, the ash content is not higher than 0.2%, the water content is not higher than 0.02%, and the prepared special graphite for ion implantation has excellent comprehensive performance indexes. The volume density is 1.85-1.92 g / cm < 3 >, the porosity is smaller than or equal to 7%, the resistivity is 12-14 mu omega m, the breaking strength is larger than or equal to 85 MPa, the compressive strength is larger than or equal to 180 MPa, the Young modulus is 13-15 GPa, the thermal expansion coefficient is smaller than or equal to 5.0 * 10 <-6 > / DEG C, the total impurity content is smaller than or equal to 50 ppm, the key metal element content is smaller than or equal to 5 ppm, and all the properties reach the industry leading level. The harsh requirements of the ion implantation technology on the special graphite material in the aspects of electric heating performance, mechanical performance, thermal stability and purity can be fully met, and stable operation and efficient work of ion implantation equipment are effectively guaranteed.

The invention provides an environment-friendly silicon wafer as well as a preparation method and application thereof, and belongs to the technical field of reactive sintering silicon carbide ceramics. The environment-friendly silicon wafer is prepared from the following raw materials in parts by mass: 100 parts of silicon powder, 5-10 parts of a binder, 8-15 parts of petroleum coke and water, and the binder is an environment-friendly binder and comprises one or more of corn starch, maltose, cane sugar and glucose. The environment-friendly adhesive is used for the silicon wafer, no unpleasant smell exists in the silicon wafer preparation and siliconizing sintering use process, the environment-friendly requirement can be met, and industrial production is facilitated; the use amount of the binder is limited, it can be guaranteed that in the sintering process of the reactive sintering silicon carbide ceramic, after a part of carbon content (solid content) is converted to be sintered, a blank still forms a round shape after silicon is dissolved out, the appearance is not deformed, and the problems that after the binder is sintered, the deformation is large, and the binder cannot be separated from the silicon carbide ceramic to be sintered are solved.