8results about How to "Good deoxidation effect" patented technology

The invention relates to the technical field of welding materials, in particular to a high-efficiency deposited nickel-based welding wire capable of preventing welding cracks based on phase regulation and application of the high-efficiency deposited nickel-based welding wire, and the nickel-based welding wire comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C, 0.10-0.20% of Si, 2.9-3.2% of Mn, and 1t of P; 0.005%, S: lt; 0.003% of Cu, 19.7-20.5% of Cr, less than or equal to 0.04% of Co, and 1t of Cu; the Ni-based alloy comprises the following components in percentage by weight: 0.10% of Ni, 0.3-0.6% of Ti, 0.4-2.0% of Fe, 2.1-2.9% of Nb, less than or equal to 0.3% of Mo, less than or equal to 0.01% of N, less than or equal to 0.005% of O, less than or equal to 0.50% of other impurity elements and the balance of Ni. The specific value of Ti to Nb is controlled to be 0.10-0.22, the specific value of C to Nb + Ti is controlled to be 0.012 or below, appropriate morphology and distribution of (Nb, Ti) C type intergranular precipitates are obtained, precipitation of grain boundary M23C6 is reduced, and the creep resistance and high-temperature deplasticity crack resistance of the material are effectively optimized.

The utility model provides a purification device for gas deoxidation, which belongs to the technical field of chemical equipment and comprises a deoxidizer, a heat exchanger, a gas distributor and a powder collecting tank. The deaerator comprises a deaerator cylinder, and a raw material gas inlet pipe and a raw material gas outlet pipe are arranged at the bottom of the deaerator cylinder; the heat exchanger comprises a built-in heat exchanger and a central heat exchange tube connected to the built-in heat exchanger; the built-in heat exchanger is communicated with a feed gas inlet pipe; the central heat exchange tube is communicated with the built-in heat exchanger; the gas distributor comprises a sieve plate distributor and a cone distributor, and the sieve plate distributor is positioned above the cone distributor; the powder collecting tank is connected to the central heat exchange tube and is connected to the small end of the cone distributor; and a powder discharging pipe is arranged at the bottom of the powder collecting tank. According to the device, raw material gas can be uniformly distributed, the retention time of the raw material gas and the contact time of the raw material gas and a deoxidizing agent are prolonged, bias flow of the raw material gas is avoided, the deoxidizing effect of the deoxidizing agent is ensured, and the service life of the deoxidizing agent is prolonged.

The invention relates to the technical field of multi-component alloy preparation, and discloses a rare earth oxide-containing silicon-barium alloy and a preparation method thereof.The preparation method comprises the following steps: mixing rare earth balls, silica, baryta, a layered composite material, modified carbon fibers, semi-coke and steel cuttings to obtain a mixture; and the mixture is placed in a submerged arc furnace to be circularly smelted, mixed rare earth silicon barium alloy liquid is formed, the mixed rare earth silicon barium alloy liquid is subjected to refining and slagging-off, casting forming is conducted, and the silicon barium alloy containing the rare earth oxide is obtained. The formed layered composite material has relatively high interlayer capacity, and the silicon element and the rare earth element in the mixture can be adsorbed to the interlayer of the layered composite material, so that the formation of a uniformly distributed silicon-barium-rare earth alloy phase is facilitated; the modified carbon fibers are small in size and can be filled into pores of the silicon-barium alloy, the compactness of the alloy is improved, and then the compactness of the silicon-barium-rare earth alloy phase is enhanced.

The invention provides a grease hydrodeoxygenation catalyst and a preparation method and application thereof, the preparation method comprises the following steps: mixing an aluminum-containing inorganic porous material, an acidic solution, an extrusion aid, a magnesium salt and a nickel salt, then carrying out extrusion molding to obtain a carrier precursor, and drying and roasting the carrier precursor to obtain a hydrodeoxygenation composite carrier; by taking the total weight of the carrier as 100%, the content of the magnesium element is 0.5-10%, and the content of the nickel element is 0.3-2%; dipping the hydrodeoxygenation composite carrier with a dipping solution containing active metal, and then drying and roasting to obtain the grease hydrodeoxygenation catalyst. When the hydrodeoxygenation composite carrier is prepared, magnesium salt and nickel salt are combined, and the hydrodeoxygenation composite carrier with a nickel-doped magnesium aluminate spinel structure can be obtained. The hydrodeoxygenation composite carrier has good hydrothermal stability and mechanical strength. The grease hydrodeoxygenation catalyst prepared by loading an active metal component on the hydrodeoxygenation composite carrier is stable in deoxygenation activity and excellent in deoxygenation effect.

The utility model provides a multi-stage combined deoxidation tank. The multi-stage combined deoxidation tank comprises an upper tank body, a middle tank body and a lower tank body which are connected through flanges, a water inlet is formed in the side wall of the upper tank body; an inner cavity of the first-stage deoxidization chamber is a first-stage deoxidization chamber and is sequentially provided with a gas-liquid separation net, an atomizer, a first-stage deoxidization filler layer and a supporting grating plate I from top to bottom; a diversion unit and a porous liquid homogenizing plate are arranged in an inner cavity of the middle tank body; a sewage outlet and a liquid outlet are formed in the bottom of the lower tank body, and a medicament inlet is formed in the side wall; an inner cavity of the secondary deoxidizing chamber is a secondary deoxidizing chamber, and a secondary deoxidizing filler layer, a supporting grating plate II, a temperature control coil pipe and a supporting grating plate III are sequentially arranged in the secondary deoxidizing chamber from top to bottom. According to the multi-stage combined deoxidation tank, a multi-stage combined mode of vacuum deoxidation and chemical deoxidation is adopted, the deoxidation effect is good, the deoxidation efficiency is high, and the medicament consumption is low; the vertical integrated design of the upper, middle and lower tank bodies is adopted, the structure is compact, and the occupied area is reduced.

The invention provides a hydrodeoxygenation composite carrier and a preparation method and application thereof.The preparation method comprises the steps that an aluminum-containing inorganic porous material, an acid solution, an extrusion aid, magnesium salt and nickel salt are mixed and then subjected to extrusion molding to obtain a carrier precursor, and the carrier precursor is dried and roasted to obtain the hydrodeoxygenation composite carrier; the total weight of the hydrodeoxygenation composite carrier is 100%, and the content of the magnesium element is 0.3-8%, and the content of the nickel element is 0.3-1%. The hydrodeoxygenation composite carrier provided by the invention has hydrothermal resistance and higher mechanical strength, and can improve the hydrothermal stability of a grease hydrodeoxygenation catalyst taking the hydrodeoxygenation composite carrier as a carrier in the hydrodeoxygenation process, thereby improving the deoxygenation effect of the grease hydrodeoxygenation catalyst.

The invention relates to an ultrathin-wall alloy pipe and a preparation method and application thereof.According to the ultrathin-wall alloy pipe and the preparation method and application thereof, B, Mg and P are added into a common copper-based alloy, the plastic deformation capacity of the copper-based alloy can be improved through compounding of the B, Mg and P, and in order to avoid the situation that a copper pipe is prone to being snapped after being subjected to duplex drawing and disc drawing treatment, after a pipe blank is obtained, the pipe blank is subjected to heat treatment, according to the method, the on-line annealing step of specific current is carried out, and the outer die with a smaller angle and a shorter fixed diameter length and the floating core head with a shorter fixed diameter length are selected in the drawing treatment after annealing, so that the tensile resistance is reduced while the dimensional precision is ensured. According to the preparation method, the copper pipe with the wall thickness of 0.05-0.10 mm can be produced, the product percent of pass is high, and the preparation method has actual machining value.

This invention belongs to the field of catalyst technology, specifically relating to a sulfur recovery catalyst and its preparation method. The sulfur recovery catalyst uses Al2O3 as a support and is loaded with TiO2, Fe2O3, and Al. x O y Wherein A is selected from at least one of alkali metals or alkaline earth metals; by mass fraction, TiO2 content is 1wt%~15wt%, Fe2O3 content is 0.5wt%~10wt%, and A... x O y The content is 0.1wt%~5wt%, with the remainder being Al2O3. This invention uses shaped alumina as a support to ensure the mechanical strength and appropriate catalytic activity of the catalyst. Secondly, Ti-Fe-A is formulated into a stable composite complex and loaded onto the support through co-impregnation. Calcination then allows the components to be cross-distributed at the atomic level, ensuring interconnection between reactions. This improves the overall activity of the catalyst and extends its service life.