30results about How to "Controllable oxygen content" patented technology

The invention relates to a production line for low-oxygen-content hard alloy mixture. The production line is a sealed system formed by a reduction part used for preparing blue tungsten powder, a reduction part used for preparing tungsten powder, a carbonization part and a pelletizing part. According to the production line disclosed by the invention, nanometer tungsten trioxide is still in the sealed production line from the rotary reduction furnace inlet of a starting end to the spraying drying tower of a tail end; the sealed production line is filled with nitrogen or hydrogen, so that nanometer powder is prevented from contacting with external air all the time so as to reduce the size of nanometer WC (wolfram carbide) particles and prevent nanometer WC from being oxidized and auto-ignited; the oxygen content of the hard alloy mixture is lowered; the stability and the controllability of the ultra-fine grain hard alloy quality are improved; the combination property of the alloy is improved.

The invention discloses titanium carbide-based solid solution metal ceramic and a preparation method thereof. The titanium carbide-based solid solution metal ceramic is composed of a hard phase (Ti, W) C solid solution and an adhesive phase Ni, wherein the composite material powder is prepared by mold pressing forming, degreasing and vacuum sintering; the composite material is synthesized by utilizing Ti powder, W powder, Ni powder and graphite powder as raw materials and performing a high-energy ball milling induced self-propagating reaction under argon protection, and the raw materials comprise the following ingredient by mass percent: 40.60-58.02% of Ti powder, 11.02-29.18% of W powder, 15.00-20.00% of Ni powder and 11.94-15.27% of graphite powder. The preparation of solid solution powder is simple in process, short in cycle, low in energy consumption and easy to control the oxygen content, the hardness of the prepared titanium carbide-based solid solution metal ceramic is 89.0-91.8HRA, the bending strength is not smaller than 1680MPa, and the fracture toughness KIC is not smaller than 12.5MPa.m1 / 2, so that the titanium carbide-based solid solution metal ceramic is suitable for serving as high-speed and high-efficiency cutting tools, hot extrusion molds and heat-resistant, corrosion-resistant and wear-resistant parts and components.

The invention relates to a powder coal gasification powder processing and water recovery integrated system for high-moisture coal. The system comprises a steam indirect heat transfer drying machine, an absorption tower, a flash tower, a vacuum pump / Venturi injection pump and a raw coal bunker. The steam indirect heat transfer drying machine is connected with the raw coal bunker, a bag-type dust collector I and a surge bunker; the surge bunker is connected with a coal mill; the coal mill is connected with a hot blast heater, and a bag-type dust collector II and a delivery pipe II are arranged at the top of the coal mill respectively; the top of the absorption tower is connected with a carrier gas initial heater, a circulating pump is arranged at the bottom, and the side of the absorption tower is connected with the flash tower; the circulating pump is connected with an air heater and connected with the carrier gas initial heater; the air heater is connected with the flash tower and the hot blast heater respectively; the flash tower is connected with a condenser which is connected with the vacuum pump / Venturi injection pump; and the flash tower is connected with the carrier gas initial heater. The invention further discloses an application method of the system. According to the system and the method, the investment is small, and energy consumption can be reduced effectively.

The invention relates to the technical field of medical experiment, in particular to an obstructive sleep respiratory disorder disease animal model preparation system. The obstructive sleep respiratory disorder disease animal model preparation system comprises a head cap and a simulation container device, wherein the first end of the simulation container device is communicated with the inside of the head cap; the corresponding second end of the simulation container device is used for connecting an air source; a first valve is arranged between the simulation container device and the air source; one end of the head cap is open; the head cap is used for externally sleeving on a target animal; the opening of the head cap can be connected with the neck part of the target animal in a sealed way; a pressure stabilization device is connected onto the simulation container device; the pressure stabilization device presets a pressure threshold value and is used for controlling the on-off state of an air path inside and outside the simulation container device. The invention aims at providing the obstructive sleep respiratory disorder disease animal model preparation system for improving the knowing and treatment on an obstructive sleep respiratory disorder disease.

The present invention relates to the technical field of permanent magnet materials, in particular to a preparation method of high-performance sintered Re-Fe-B system. The present invention adopts the mode of segmented magnetic field orientation automatic pressing, which can obviously improve the degree of orientation, thereby increasing Br, without Isostatic pressing, easy to control the oxygen content, will not cause the metal mold to heat significantly, can realize continuous mass production, and because the Hcj of the magnet with high Br is low, the Hcj can be significantly improved by adopting the diffusion process, and the Br is basically not reduced at the same time. The preparation of the present invention In the method, the whole process of zero oxygen control after milling and before furnace loading and sintering can effectively avoid partial or corner oxidation of the blank.

The invention belongs to the technical field of chemical reaction devices, and relates to a high-temperature sodium combustion reaction experimental device. The experimental device includes a sealed glove box, a gas inlet, a reaction vessel, a sodium inlet, a heating plate, a power supply, a balance, an aerosol collection container, an aerosol collection container, an aerosol collection pipeline, an aerosol collection port, Air suction pump, gas collection pipeline, gas collection port, gas collection bag. The high-temperature sodium combustion reaction experimental device of the present invention can be better used for the experimental research of high-temperature sodium combustion reaction.

The invention provides low oxidation metal powder, a preparation method thereof and a sealed ball mill used for preparing the low oxidation metal powder. The oxygen content of the low oxidation metal powder is smaller than 0.15%. The preparation method of the low oxidation metal powder comprises the following steps that S002, raw materials of the low oxidation metal powder are ground into powder, then the powder is subjected to dehydrogenation and deoxygenation treatment, and low oxidation metal powder agglomerates of which the oxygen content is smaller than 0.15% are obtained; and S004, the low oxidation metal powder agglomerates are ground into powder under the anaerobic condition, so that the low oxidation metal powder is obtained. The sealed ball mill used for preparing the low oxidation metal powder comprises a rack, a ball milling barrel and a motor. The rack is provided with a sealed barrel. One end of the sealed barrel is provided with an opening. The opening is provided with a sealing cover. The other end of the sealed barrel is provided with a shaft hole. The ball milling barrel is arranged in the sealed barrel. One end of the ball milling barrel is provided with a material opening. The material opening is provided with a material cover. The other end of the ball milling barrel is provided with a rotating shaft. The rotating shaft penetrates through the shaft hole and extends out to the outer side of the sealed barrel. A main shaft of the motor is in drive connection with the rotating shaft of the ball milling barrel through a transmission mechanism.

The invention discloses a continuous casting and rolling production process of an oxygen-free copper rod. The continuous casting and rolling production process comprises the following steps of putting electrolytic copper raw materials in a sealed mixing melting furnace for smelting, introducing reduction gas, then discharging from a copper outlet of the sealed mixing melting furnace, flowing into a molten copper casting ladle through a molten copper diversion trench, opening a casting gate of the molten copper casting ladle, continuously and uniformly pouring molten copper to a continuous casting crystallizer through a stainless steel pouring nozzle of the molten copper casting ladle so as to form a continuous casting copper ingot, quickly and uniformly applying oxidation resistant lubricating oil to the surface of the continuous casting copper ingot, sending to a rolling mill so as to be rolled into the oxygen-free copper rod, cooling the oxygen-free copper rod until the temperature of the oxygen-free copper rod is reduced below 80 DEG C, then wiping to remove the oxidation resistant oil from the surface of the oxygen-free copper rod, and then wiping the surface of the oxygen-free copper rod with a small amount of industrial alcohol so as to package and store. By adopting the continuous casting and rolling production process, the quality of the oxygen-free copper rod prepared by adopting the continuous casting and rolling process can be increased.

The invention belongs to the technical field of material science, and particularly relates to a method of directly synthesizing large-area graphene oxide based on plasma-enhanced chemical vapor deposition. The method comprises the following specific steps of pretreating a substrate; growing graphene oxide on the substrate by using a plasma-enhanced chemical vapor deposition system; after the growth is ended, taking out the graphene oxide, wherein the key point of synthesis is introduction and control of oxide atoms. The method disclosed by the invention is short in reaction time and low in reaction temperature; in addition, oxygen content of the graphene oxide is controllable. Compared with existing graphene oxide synthesized by a chemical method, the graphene oxide synthesized by the method disclosed by the invention has the characteristics of large size and good uniformity in size, and can be applied to the fields of gas detection, photoelectric devices and the like.