56results about How to "Guaranteed sphericity" patented technology

A process for reducing the Fe-base catalyst used for slurry-bed Fischer-Tropsch synthesis includes such steps as adding the liquid-phase hydrocarbon compound whose boiling point is higher than 34 deg.C and proper Fe-base catalyst to slurry-bed reactor, displacing the air in the reactor system by inertial gas or synthetic gas, raising pressure, program-controlled raising temp, in-situ reducing for 15-94 hrs, and direct Fischer-Tropsch synthesizing.

The invention relates to a system for preparing gel ball, belonging to the technique that preparing ceramic gel ball. Said system comprises two parts as vibration dispersion system and gel system. Wherein, the vibration dispersion system comprises a signal controller 1, a vibrator 2, and an ejector; the gel system comprises a ammonia distributing ring 4, a gel post 5, a liquid groove 9, a baffle post 16, and a ball storage pot 11. The liquid of gel via cycle pump 14 can be cycled between the gel post 5, the liquid groove 9, and the baffle post 16; the sol via the ammonia distributing ring 4 is gelled into gel ball in the gel post 5; and the gel ball will flow into liquid groove 9 with liquid. Said system can confirm full gelling on the sol ball and reduce the pressure between gel balls, to avoid the distribution of flowing medium liquid on the liquid level. And it has simple operation and the application for continuous operation.

The invention discloses a preparation method of titanium-doped lithium iron phosphate positive electrode material. Lithium source compound, phosphorus source compound, iron source compound and metal titanium are used as raw materials, mixed uniformly, melted at high temperature in a furnace, and quenched in water. into granules, and then together with carbon source compounds, through grinding and dispersion, so that the particle size reaches the fineness index of D90≤0.2μm, and then spray-dried to make powder, and calcined in an atmosphere furnace at 600-800°C for 40-300 minutes, After cooling, the lithium iron phosphate positive electrode material is obtained; the uniformity of the lithium iron phosphate positive electrode material is improved by adopting a high-temperature melting method; metal titanium powder is introduced, and the Fe in the melt is melted at a high temperature. 3+ reduced to Fe 2+ , and make the generated Ti 4+ Doped into the lithium iron phosphate structure, the electronic conductivity of the lithium iron phosphate positive electrode material is improved by forming vacancies; the specific surface area is reduced by grinding, dispersing and carbon coating, and the tap density of the lithium iron phosphate positive electrode material is improved. Breaking and integrating not only maintains the original sphericity but also simplifies the process.

A slurry phase Fischer-Tropsch synthesis industrial iron-based catalyst roasting method is to combine the continuous co-precipitation and spray drying method to prepare the industrial large-particle spherical iron-based catalyst with a thickness of 20-100 mm, which is tiled on the swirling airflow belt drying method. On the material conveyor belt of the dryer, adjust the inlet temperature of the heating section of the dryer to 200-300°C, and stay for 5-10 hours; After 4 to 8 hours, a catalyst that has been roasted and can be directly used for industrial slurry phase Fischer-Tropsch synthesis without sieving is obtained. The attrition index of the catalyst after calcination of the present invention is less than 0.5%. The invention has the advantages of continuous drying of large batches of materials, easy operation, less failure and less equipment investment.

The invention discloses an in-situ self-generated nano-Al 2 o 3 A laser additive manufacturing method for strengthening an aluminum-based composite material, the method comprising the following steps: (1) mixing ZnO ceramic powder and AlSi10Mg aluminum alloy powder and ball milling to obtain a ZnO / AlSi10Mg composite powder; (2) preparing the composite powder The laser selective melting process is used for additive manufacturing forming to form a solid sheet; (3) The laser re-scans the solid sheet to form a remelted sheet; (4) Repeat steps (2) and (3) to finally form the original self-generated nano-Al 2 o 3 Reinforced aluminum matrix composites. In the present invention, laser is used to excite Al and ZnO to generate aluminum thermal reaction between them in situ. 2 o 3 Ceramic particles, and by improving the overall flow process design of the method, combining laser selective melting and laser remelting scanning, the aluminum matrix composite material obtained has high density, fine microstructure, and in-situ self-generated Al 2 o 3 The particle size is nanoscale, uniformly distributed, and its phase interface is well combined with the aluminum matrix.

The invention belongs to the technical field of comprehensive utilization and processing of secondary resources, and relates to a special binder for corundum slag pellets and a preparation and use method thereof. The technical problem to be solved by the present invention is to provide a special binder for corundum slag pellets that can improve the pelletizing rate and strength of the pellets. The special binder is prepared from the following raw materials in weight ratio: 65-70% of plant starch, 4-5% of high molecular polyanion cellulose, 16-18% of plant dextrin and 10-12% of curing agent. The special binder for corundum slag pellets of the present invention has high viscosity, which can improve the viscosity of corundum slag materials, ensure the ball forming performance, initial strength and later drying strength, the ball forming rate can reach more than 95%, and the initial strength can reach 2 meters high. Drop once without breaking, and later drying strength reaches 2 meters high, drop 3 times naturally without breaking. The use of the binder of the invention significantly improves product quality, reduces the cost of the binder by 50 yuan / ton, and has broad application prospects.