30results about How to "Efficient deoxidation" patented technology

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100, titania nanoparticle 58-100 and binder 1.5-25 to obtain a mixture; (2) kneading the mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (3) aging and drying; and (4) calcining. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity up to 24.8 mL / g, high mechanical crushing strength up to 89 N / cm, deoxygenation depth smaller than 0.01 ppm, low reduction temperature, and wide applicability in industrial production.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100, titania nanoparticle 58-100 and binder 1.5-25 to obtain a mixture; (2) calcining; (3) kneading the calcined mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (4) aging and drying; and (5) calcining. The second calcining temperature is lower than the first calcining temperature. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity, high mechanical crushing strength, low deoxygenation depth, low reduction temperature, and wide applicability in industrial production.

The invention relates to a method for producing high-conductivity oxygen-free copper and a smelting device. According to the method, high-purity electrolytic copper blocks are washed cleanly, dried and fed into a graphite crucible, and is vacuumized, and a main heater is started to smelt the copper blocks into a copper liquid; a graphite mixer suspended in the graphite crucible is started to make up-down reciprocating movement and mixing in the graphite crucible to obtain liquid oxygen-free copper, and the liquid oxygen-free copper is poured in an ingot puller for crystallization and ingot pulling to obtain oxygen-free copper ingots. The smelting device comprises a vacuum smelting furnace body, the main heater and the graphite crucible which is arranged in a receiving cavity of the furnace body, wherein the bottom of the graphite crucible is provided with a liquid discharge port and a liquid discharge control valve. The smelting device is characterized in that the graphite mixer capable of lifting is suspended in the graphite crucible. The method and the smelting device have the advantages that the use of the graphite mixer for mixing increases the contact area between oxygen gas and graphite in copper liquid, and high-efficiency oxygen removal is achieved; and the requirements for the raw materials are not strict, the production cost is low, and the conductivity of the oxygen-free copper produced meets the requirements of high-class conducting wires.

The invention relates to a method for preparing beryllium-containing silicon carbide ceramic fibers through a gallium bath, and belongs to the technical field of silicon carbide fiber preparation. The present invention uses beryllium-containing SiC ceramic precursors as raw materials; through melt spinning, PBCS precursors are obtained; the PBCS precursors are subjected to non-melting treatment; the precursors after non-melting treatment are obtained; the precursors after non-melting treatment are processed gallium bath to obtain deoxidized precursors; the temperature of the gallium bath is 29.76-100° C.; the obtained deoxidized precursors are subjected to high temperature treatment to obtain finished products. The preparation process of the invention is reasonable, the obtained product has excellent performance, and is convenient for large-scale industrial application.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100, modified titania nanoparticle 58-100 and binder 1.5-25 to obtain a mixture; (2) calcining; (3) kneading the calcined mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (4) aging and drying; and (5) calcining. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity, high mechanical crushing strength, low deoxygenation depth, low reduction temperature, and wide applicability in industrial production.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100 and titania nanoparticle 58-100 to obtain a mixture; (2) calcining; (3) kneading the calcined mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (4) aging and drying; and (5) calcining. The second calcining temperature is lower than the first calcining temperature. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity up to 27.1 mL / g, deoxygenation depth lower than 0.01 ppm, low reduction temperature, and wide applicability in industrial production.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100 and modified titania nanoparticle 58-100 to obtain a mixture; (2) calcining; (3) kneading the calcined mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (4) aging and drying; and (5) calcining. The second calcining temperature is lower than the first calcining temperature. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity up to 31 mL / g, deoxygenation depth lower than 0.01 ppm, low reduction temperature, and wide applicability in industrial production.

The invention relates to a method for preparing silicon carbide ceramic fibers containing beryllium by using gallium as a deoxidizer, and belongs to the technical field of silicon carbide fiber preparation. The present invention uses beryllium-containing SiC ceramic precursors as raw materials; through melt spinning, PBCS precursors are obtained; the PBCS precursors are subjected to non-melting treatment; the precursors after non-melting treatment are obtained; the precursors after non-melting treatment are processed Gallium bath to obtain deoxidized precursors; the temperature of the gallium bath is 29.76-100°C; the obtained deoxidized precursors are subjected to high temperature treatment, and then subjected to a gallium bath; finally tempered above 600°C to obtain finished products. The preparation process of the invention is reasonable, the obtained product has excellent performance, and is convenient for large-scale industrial application.

The invention discloses a fluorine-free carbon-free high-alkalinity submerged arc foaming refining agent for an LF (ladle furnace) and a preparation method thereof. The refining agent comprises the following components in percentage by weight: 20 to 60 percent of calcium oxide, 4 to 10 percent of magnesium oxide, 10 to 20 percent of aluminum oxide, 6 to 20 percent of barium oxide, and 6 to 12 percent of plant cellulose. According to the method, the raw materials are reasonably assorted, foundational slag can release gas through a high temperature decomposition reaction, and the compound with a plurality of fine pores in a polymer is of a foaming shape, the thickness of the slag layer is increased, the performance is constant and stable, the radiation of electric arc to a flame retardant material can be reduced, and the electric arc heating effect is improved. Furthermore, a proper deoxidation and desulfurization promoting agent is added in the foundational slag, so that the content of oxide in steel is reduced, carbon and silicon are not increased, the adsorption and inclusion effect is good, the refining time is shortened, and the service life of steel ladles is improved.

The invention relates to a waste electromagnetic wire copper refining agent and a preparation method and application thereof. The refining agent is preferably composed of, by mass, 1.0-5.0% of V, 1.0-5.0% of Sr, 0.5-2.5% of B, 5.5-7.5% of Mg, 5-10% of Y, 5-10% of Ce and the balance Cu. According to the preparation method of the refining agent, Cu-B-Y-Ce-Mg intermediate alloy and Cu-Sr intermediate alloy are crushed into fragments with the particle size being smaller than 10 mm, and the fragments and vanadium with the particle size being smaller than 10 mm are mixed evenly according to a set proportion and then wrapped with a high-purity oxygen-free copper sheet to obtain the refining agent. The refining agent can be used for refining oxygen-free copper from waste copper electromagnetic wires, and the adding amount is 0.1-0.65 percent of the melt mass. The refining agent of the design has the good effects on deoxidation, desulfurization, dealumination, deferrization, denickelefication and the like, and does not pollute copper liquid secondarily. The refining agent is reasonable in component design and simple in preparation process and can achieve large-scale industrial application conveniently.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100, modified titania nanoparticle 58-100 and binder 1.5-25 to obtain a mixture; (2) kneading the mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (3) aging and drying; and (4) calcining. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity up to 28.5 mL / g, high mechanical crushing strength up to 88 N / cm, deoxygenation depth smaller than 0.01 ppm, low reduction temperature, and wide applicability in industrial production.

The invention discloses a method for rapid slag formation in the tapping process of high-quality steel. During production, the tapping temperature of an electric furnace or a converter is controlled at 1630°C-1680°C to meet the needs of refining slag melting and deoxidation in the tapping process; , when the tapping amount reaches 30-80%, add pre-deoxidizer and alloy to the molten steel casting stream through the alloy chute to realize the initial precipitation deoxidation of molten steel; Blow the flow of argon to keep the diameter of the exposed surface of the molten steel at 200-600mm, and at the same time spread aluminum particles evenly on the slag surface. In the tapping process of the converter or electric furnace, the invention quickly forms a low-oxidation and high-fluidity refining slag system through deoxidation alloying of molten steel and evenly spreading aluminum particles on the slag surface, which not only improves the refining efficiency of the LF refining process, but also improves the Improve the refining effect of molten steel and improve the quality of molten steel to solve the problem that the deoxidation and rapid slagging of refining slag cannot be effectively realized in the current tapping process of electric furnace or converter.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100 and titania nanoparticle (modified by alkali metal oxide) 58-100 to obtain a mixture; (2) kneading the mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (3) aging and drying; and (4) calcining. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity up to 29.3 mL / g, deoxygenation depth smaller than 0.01 ppm, low reduction temperature, and wide applicability in industrial production.

The invention belongs to the field of household appliances, and particularly relates to an air purifying fan capable of generating ionic wind for air purification. The air purifying fan comprises a fan shell, a rotating shaft, an air purifying device and fan blades. The rotating shaft is inserted into the fan shell, the fan blades are fixed to one end of the rotating shaft, and the air purifying device is arranged on the periphery of the rotating shaft in a matched mode. The air purifying device comprises needle electrodes, matched electrode sets and ironic wind releasing openings, wherein the matched electrode sets are symmetrically distributed around the central axis of the air purifying device, the needle electrodes are arranged at the sides opposite to the matched electrode sets, and the ionic wind releasing openings are distributed on the left side face and the peripheral side face of the air purifying device. The air purifying device of the structure generates ionic wind through corona discharge, ionic wind containing high-concentration ions can be sent out through the matched electrode sets, and therefore efficient deoxygenation, sterilization and disinfection are achieved.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100 and titania nanoparticle 58-100 to obtain a mixture; (2) kneading the mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (3) aging and drying; and (4) calcining. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity up to 25.5 mL / g, deoxygenation depth smaller than 0.01 ppm, low reduction temperature, and wide applicability in industrial production. The agent realizes high-efficiency deoxygenation at room temperature.