204results about How to "Reduce oxidation loss" patented technology

A manufacturing method of nodulizers with small chemical composition segregation and low oxidation loss is characterized in that the first part is an extruded magnesium treatment device which reacts under the condition of being filled with inert gases or carbon dioxide, thus effectively controlling the reaction time of the magnesium metal and superalloy liquid and conducing to the magnesium metal to form Mg2Si; the second part is a combined molten pool for pouring nodulizer alloy liquid; the combined molten pool and the pouring basin can ensure that the nodulizer alloy liquid rapidly fills the die cavity of the molten pool in a possibly short time and that the nodulizer alloy liquid of the pouring type die cavity can congeal at the same time. The alloy liquid is evenly cooled in a closed die cavity, thereby overcoming the oxidation and segregation of the upper surface of the nodulizer alloy liquid. The product quality is stable and the manufacturing cost is obviously lower than that of the nodulizer produced by the secondary smelting and remelting method. The method cancels the secondary smelting process of the nodulizers of rare earth-Mg-Si-Fe, achieves the purpose of energy-saving and environment protection and eliminates environmental pollution.

The invention discloses a melt processing method of high-speed steel rolls containing high vanadium used for various rolling mills. When molten steel in transportation, ferrovanadium granules are added with flowing, the addition amount of the ferrovanadium granules is 0.80-1.20 percent of total weight of the molten steel. Before the molten steel is poured over a pouring ladle, yttrium based rare earth magnesium alloy, nitriding ferrochrome, potassium salt and metal aluminum are added into the pouring ladle in advance; wherein, the addition amount of the yttrium based rare earth magnesium alloy is 0.30-0.80 percent of the weight of the molten steel, the addition amount of the nitriding ferrochrome is 0.20-0.50 percent of the weight of the molten steel, the addition amount of the potassium salt is 0.30-0.80 percent of the weight of the molten steel and the addition amount of the metal aluminum is 0.30-0.60 percent of the weight of the molten steel. When the temperature of the molten steel reaches between 1450-1480 DEG C, the molten steel in a centrifuge is directly cast into rollers; during the process of casting molten steel, the ferrovanadium granules and ferrotitanium granules with granule dimension between 5mm-8mm are added with flowing, wherein, the addition amount of the ferrovanadium granules and the ferrotitanium granules is respectively 0.30-0.80 percent and 0.40-1.00 percent of the total weight of the molten steel. The centrifugal casting high-speed steel rolls containing high vanadium of the invention has less segregation, no casting cracks, high rigidity and good abrasion resistance.

The invention discloses a low-metal-loss smelting method of a copper alloy, which comprises the following steps: (1) adding all the raw materials except fusible and oxidable raw metals into a smelting furnace according to the components contained in the target alloy; after the raw materials are molten, introducing nitrogen or air into the smelting furnace, raising the pressure of the smelting furnace to 1-50 atm, and adding the low-melting raw metals into the smelting furnace; cooling the alloy melt, lowering the pressure of the hearth, and recovering valuable metals by using a micro reducing medium; using high-purity nitrogen, argon or carbon dioxide as a carrier gas, and adding a refining agent into the melt; introducing high-purity nitrogen or argon into the melt by using a rotary sprayer; adding a reducer-slag former mixture into the smelting furnace; and after removing all the furnace slag, adding a covering agent on the surface of the molten metal. The smelting method of the copper alloy can lower the metal loss, effectively remove impurity elements and gas inclusions in the alloy in the smelting process and enhance the refining effect.

The invention relates to an electroplating method, in particular to a method for co-depositing an Al-Mn alloy plating layer in an ionic liquid system. The method has the characteristics in that: a metal material is taken as a cathode and a pure aluminum material with the purity of more than 99 wt% is taken as an anode; a mixture of MnSO4, R3(SO4)3 and Al2O3 is added into an electrolytic cell, themixture is fused with [EMIM]HSO4 ionic liquid, and then the fused mixture is used as an electrolyte to carry out electrolysis. The method provided by the invention has the advantages that: the [EMIM]HSO4 ionic liquid is adopted as the electrolyte so that aluminum ions and manganese ions are electrolyzed and co-deposited on a cathode material to generate a uniform and dense Al-Mn alloy plating layer; the heat energy needed by generating the plating layer is low (the step of plating can be carried out at a temperature of 100 DEG C), the oxidization loss of an alloy metal is small, a zero-pollution emission is realized and the production cost is low, so that the method accords with a development tendency of the modern industrial production.

The invention provides a continuous casting billet hot delivery and hot charging process and solves the problem that products in the prior art are not stable enough in performance. The quality of casting blanks is guaranteed while the effects of energy saving and environmental production are achieved, and meanwhile, the fuel consumption of a casting blank heating furnace is reduced and the output of the casting blank heating furnace is increased; the surface oxidation burning loss amount of casting blanks is reduced; the time for heating the casting blanks in the furnace is reduced and thus the surface oxidation burning loss amount of the casting blanks is reduced relatively; generally the burning loss amount of a cold charging furnace is 1.5%-2.0%, sometimes more than 2.5%; under the condition of a hot charging furnace, the burning loss amount can be reduced to 0.5%-0.7%, so that the yield of the casting blanks is increased.

The invention discloses a petroleum coke calcining rotary kiln, which comprises a rotary kiln(9); an insert plate valve(1) is arranged below a calcining front chamber; an adhesive tape constant feeder(2) is arranged below the insert plate valve, and an adhesive tape conveyer(3) is arranged behind the adhesive tape constant feeder (2) and connected with the rotary kiln(9) by an oblique cutting feed tipping tube of an electric insert plate valve(6); the tail part of the rotary kiln(9) is connected with a dust deposition chamber(8), and the head part of the rotary kiln(9) is connected with a cooling machine(16) and provided with a burner nozzle(13) and a burner nozzle hanger(14); the petroleum coke calcining rotary kiln is also provided with a one-time combustion fan(10) matched with the burner nozzle; and a dust-containing waste gas processing system(15) is arranged beside the cooling machine(16). The petroleum coke calcining rotary kiln has the advantages of improving the unit volume capacity, greatly enhancing comprehensive utilization of waste heat and adaptability of other calcining materials such as needle coke, anthracite and the like, reducing burning loss of charcoal, saving raw materials and energy, improving automatization level and reducing labor intensity of a worker.

The invention relates to a water-based protective coating capable of adhering to a high temperature billet and a preparation method thereof, and belongs to the field of metal high-temperature protection. The water-based protective coating comprises main powder, 0-3wt% of an inorganic binder and 3-5wt% of a self-made additive. The main powder is prepared from natural raw materials such as clay, magnesite, diatomite, magnetite and metallurgy tailings. The self-made additive is a sol system comprising a surfactant and a Zn-containing component. The powder is subjected to ball milling so that particle sizes are less than 300 meshes, density of the slurry is adjusted to 1.2-1.5g/cm<3> and density is decreased with spray-coating temperature increasing. The water-based protective coating is suitable for spray-coating a billet having a temperature less than 1200 DEG C and heated in a heating furnace for 1-10h. The preparation method can realize adjustment and control of billet trace element distribution, does not change billet surface physicochemical characteristics and reduces a burning loss by more than 60%. The preparation method has active promotion effects of saving energy and reducing consumption in the metallurgy industry, improving steel quality and improving core competitiveness of a steel enterprise.

The invention belongs to the field of agricultural product drying, and particularly relates to a method for drying Hami melon slices by a nitrogen source low oxygen heat pump. The method comprises the steps of selecting Hami melons, removing peels and pulp of the Hami melons, conducting slicing, conducting color protection and type fixing, blanching, draining, conducting drying in a nitrogen source heat pump drying machine, and conducting drying, sealing and storing in a vacuum drying box. According to the method, the drying energy consumption is reduced, the drying efficiency is improved, the defects that in the drying later stage, the heat pump is low in drying efficiency and long in time required by drying are overcome, heat pump drying and vacuum low-temperature drying are carried out after color protection and blanching treatment, and therefore the problems that the brightness of the Hami melon slices is reduced, and the color is changed are solved. According to the method, phenolic substances in the Hami melon slices can be restrained from being oxidized to generate quinone, the oxidation loss of vitamin C is reduced, damage, caused by oxidation in the drying process, to the color and texture of the Hami melon slices can be avoided, and dried products with the natural color are obtained.

The invention discloses a niobium titanium microalloyed HRB500E screw-thread steel and a preparation method thereof. The HRB500E screw-thread steel comprises the following chemical components of, in percentage by mass, 0.22% to 0.25% of C, 0.30% to 0.50% of Si, 1.2% to 1.5% of Mn, 0.020% to 0.025% of Nb, 0.015% to 0.022% of Ti, 0.011%-0.015% of N, less than or equal to 0.025% of P, less than or equal to 0.018% of S, and the balance Fe and inevitable impurities. The screw-thread steel is prepared through the metallurgy process of 150t combined blown converter smelting-LF refining-7 machine 7 strand billet continuous casting; and through the optimization of an alloy system, Nb + Ti composite microalloying replaces V microalloying, the alloying cost is obviously reduced, the metallurgy process is controllable, and the low-cost stable batch production of HRB500E is realized.

In certain examples, this invention provides an inorganic composite binder with high-temperature resistance comprising 5-12% of aluminium hydroxide, 15-35% of phosphoric acid, 0.1-1% of rare earth oxide, 5-20% of silica sol, 1-15% of polyaluminium phosphate, 1-5% of borax, based on the total weight of said binder, and the rest being water, and a method for producing the same. The binder of the example can be used in temporary protective coating layer such as the high temperature coating and the high temperature antioxidation coating layer during the heat treatment of the metal workpiece, can make it possible to form an antioxidation coating layer immediately upon directly spraying the coating onto the substrate surface of the metal at high temperature of 400-1000° C., and can continuously keep its good bonding property under the high temperature environment in the heating furnace, thereby it is helpful to reduce the oxidation loss of the metal material in the heat treatment, and improve the surface quality of the metal material; also, the binder of the invention is usable in patching material for high temperature kiln or refractory material to enhance the material strength and lengthen its service life.

An electrolytic furnace group and electrolytic method thereof belong to the field of rare earth metallurgical electrolysis equipment and use technologies thereof. The electrolytic furnace group includes a shared power supply (12) and at least two electrolytic furnaces. Each electrolytic furnace includes a cathode (8) and an anode (9), wherein the shared power supply (12) is connected to each electrolytic furnace in a manner that the positive pole of the shared power supply (12) is connected to the anode of a first electrolytic furnace, and then the anode of each electrolytic furnace is connected to the cathode of the one before the electrolytic furnace, and the cathode of the last one electrolytic furnace is connected to a negative pole of the shared power supply (12). In the shared power supply (12), a circuit for supplying power to the electrolytic furnaces is a main circuit. Each electrolytic furnace also includes an adjustment part (3) for controlling the anode (9) to move. The electrolytic furnace group is sensitive in control, is convenient to use, is high in energy utilization rate, is low in electricity consumption, and allows gas generated in electrolysis to be easy to escape. In the electrolytic furnace group, electricity unit consumption of a product is reduced while the number of operated electrolytic furnaces in the group is increased.

The invention provides a cross-connection electrode for an internal thermal serial graphitization furnace and a production method thereof. The cross-connection electrode is prepared from a dry material composed of large-grained petroleum based needle coke, medium-grained petroleum based needle coke and small-grained powder, a binding agent, additives, green ground components and roasted ground components through crushing, screening, mixing, kneading, shaping, roasting, dipping, graphitizing, processing and assembling, wherein the formula is as follows: the percentage of the large-grained petroleum based needle coke is 30-40%, the percentage of medium-grained petroleum based needle coke is 20-30%, the percentage of small-grained powder is 35-45%, the content of the binding agent is 25-30% of the total weight of the dry material, the content of the additive stearic acid is 0.5-0.8% of the total weight of the dry material, the content of the additive Fe2O3 is 0-1% of the total weight of the dry material, the content of the green ground components is 10-20% of the total weight of the dry material and the content of the roasted ground components is 0-10% of the total weight of the dry material; the binding agent is modified asphalt, and the grain size of the large-grained petroleum based needle coke is 15-25mm, the grain size of the medium-grained petroleum based needle coke is 5-15mm and the small-grained powder is 200-mesh powder.

The invention provides a method and a special device for performing fusion welding on an electrode lead plate of an energy-saving environment-friendly type lead-acid battery, relating to the manufacturing technology of lead-acid batteries. The method provided by the invention comprises the following steps: (1) heating and melting solid lead for being infused into a lead storage tank or a lead injection tank to melt the lead, and preheating a melting template; (2) shifting the melting template to tightly cling to the lead storage tank, driving plunger rods to raise through the action of a cylinder on the lead storage tank or the lead injection tank, infusing liquid lead into a rectangular groove of the melting template, and closing taper holes through the plunger rods; (3) shifting the melting template to a station for fusion welding, pushing a tooling box to lead the lower surface of the tooling box to stick on the upper surface of the melting template, and inserting a small rectangular relief block in the liquid lead inside the rectangular groove of the melting template for 2-10seconds; (4) cooling the melting template; and (5) separating a box body of the tooling box from the melting template and then taking out a product. The device provided by the invention consists of a lead melting furnace, the lead storage tank or the lead injection tank; an electric heating induction coil is fixed on the lead melting furnace; the lead storage tank is provided with an electric heating pipe, the taper holes, a cylinder piston rod and a linkage plate; and a liquid inlet pipe arranged on the side wall of the upper part of the lead storage tank is communicated with a liquid outlet pipe of the lead melting furnace. The method and the special device provided by the invention have the advantage that: little liquid lead is used so as to meet the energy-saving requirement during the process of lead injection.

The invention discloses an anti-oxidation device and method for calcining and preparing a new material, and belongs to the field of metallurgical chemical engineering equipment. The anti-oxidation device comprises a small crucible (6) with a small crucible cover (5) and a big crucible (1), wherein a to-be-calcined material (7) is held in the small crucible (6); the small crucible (6) is arranged inside the big crucible (1); the lower part of the big crucible (1) is filled with high temperature oxytropic powder (4) capable of completely embedding the small crucible (6); the upper part of the big crucible (1) is filled with a sealing layer used for sealing the big crucible (1). Through the simple and effective combination of the inner system and the outer system, the device not only prevents material oxidation, but also ensures normal conducting of the calcination chemical reaction, is convenient to operate, time-saving, safe and low in cost, and is extremely suitable for common teaching and experiment, as well as small and medium size industrial manufacture users who use the device infrequently or discontinuously.

The invention discloses a method and device for calcinating needle coke with a rotary kiln. The method makes use of a rotary kiln to calcinate needle coke, so that a violent thermal shock generated during green coke's entrance into existing rotary hearth calciners can be avoided, and the calcinated coke has greatly reduced brittleness, thus enhancing the content of coarse particles in modern large-specification electrode production. The device comprises a rotary kiln (1), the feed inlet of which is provided with a feeding device and an ash settling chamber. The discharge port of the rotary kiln is in connection with the feed inlet of a cooling machine (3) adopting dual cooling through an electric elephant trunk (2). The cooling machine is connected to a waste gas treatment system (4). The rotary kiln is driven to rotate by a variable frequency motor (5). The discharge port of the rotary kiln is provided with a double-frequency conversion blower (6). By employing the method and the device of the invention, the quality of calcinated coke can be improved, the investment can be reduced, the running rate can be high, automatic control is easy to realize, and the labor intensity of workers can be lowered.

The invention discloses an extraction method of phyllanthus emblica polyphenol. The extraction method comprises the following steps: removing stalks of obtained phyllanthus emblica fresh fruit, cleaning with deionized water, draining water, removing kernels, adding the phyllanthus emblica fresh fruit to a precooling acetone solution, pounding, homogenizing, carrying out magnetic force oscillation, centrifuging, taking supernatant, repeating the steps so as to extract precipitates for two to three times, combining supernatant, and recycling acetone, thus obtaining a total extracting solution; filtering the total extracting solution by using a pretreated hollow fibrous membrane; purifying a hollow fibrous membrane filtering medium by using a polyamide chromatographic column, collecting eluant, recycling alcohol, concentrating, and carrying out freeze drying, thus obtaining the phyllanthus emblica polyphenol. Compared with a conventional heat extraction method, the extraction method disclosed by the invention has the advantages that the extraction temperature is low, a technology is simple and easy to operate, the extraction effect is good, the extraction rate of the phyllanthus emblica polyphenol reaches above 95%, and the purity of the phyllanthus emblica polyphenol finished product reaches above 99%.

The invention discloses a copper-zirconium alloy for an electronic component and a preparation method of the copper-zirconium alloy. The copper-zirconium alloy comprises the following alloy componentsincluding, by weight, 0.05%-0.4% of Zr, 0.05%-0.2% of Mg, 0.03%-0.15% of Si, 0.01%-0.06% of rare earth and the balance Cu and inevitable impurity elements. The invention further discloses the preparation method of the alloy. The preparation method comprises the steps of melting, alloying, casting, hot rolling, rough rolling, aging, finish rolling, stress relief annealing and finished product treatment. The copper-zirconium alloy has high strength, high conductivity and excellent bending processability under the influence of the comprehensive action of the added Mg, Si and rare earth elements,the preparation method of the alloy easily achieves engineering production and is low in cost, the tensile strength of a finished strip is not less than 560 MPa, the conductivity is not less than 80%IACS, and the product can be used for a tremendous-scale integrated circuit, a large-current electronic element and a heat dissipation component.