236 results about "Mangalloy" patented technology

The application relates to a method for smelting high-manganese steel in a converter, and belongs to the technical field of steelmaking. The technical problem to be solved by the application is that the manganese content of end-point molten steel produced by a converter in the prior art is low. The technical solution provided by the application for solving the above technical problem is that carbon balls and high-carbon ferromanganese are added in stages according to oxygen supply amount in the smelting process of the converter, when the oxygen supply amount is within 0-10% and 10-80%, 30% and 70% of manganese alloy are respectively added; and when the oxygen supply amount is within 0-10%, 10-50%, 50-80% and 80-100%, 20%, 40%, 30% and 10% of carbonaceous raw materials are respectively added. Compared with the current process for producing high-manganese steel in a converter, the application reduces the investment of alloy heating furnaces and other equipment, meets the production requirements of more varieties of high-manganese steel, improves the metal yield of manganese, shortens the production cycle, and reduces the production cost of high-manganese steel.

The invention provides a method for improving the manganese recovery rate of a silicon-manganese alloy, which comprises the following steps: sequentially filling smelting raw materials into a closed electric furnace for smelting to obtain an alloy melt; transferring the alloy melt into a steel ladle, and blowing magnesium powder for desulfurization; the desulfurized alloy melt is subjected to slagging-off, and manganese-silicon alloy molten iron is obtained; the manganese-silicon alloy molten iron is poured into a mold for ingot casting, and a manganese-silicon alloy finished product is obtained after cooling; the smelting raw materials are sequentially filled with a backing material, a mixture and a surface material from bottom to top in the closed electric furnace; the surface material comprises aluminum powder and calcium carbide which are mixed according to a certain proportion, in the method, the surface material comprises the aluminum powder and the calcium carbide which are mixed according to a certain proportion, the effect of a reducing agent can be achieved while the ignition effect is achieved, manganese can be directly reduced in the reaction through addition of the aluminum powder, and therefore the effect of improving the manganese recovery rate is achieved.

According to the efficient smelting method and device for the silicon-manganese alloy, the manganese ore and the silica are crushed into proper particle sizes, the contact area between the raw materials is increased, the reaction speed is increased, the raw materials are fully reacted in the furnace, the proportion of the raw materials is adjusted, the reaction is more sufficient, and the qualified rate of products is increased; during smelting, a high-precision sensor is used for monitoring parameters such as temperature, pressure, current and voltage in the furnace in real time, a distributed control system is used for automatically adjusting smelting process variables such as electrode lifting, power supply power and raw material feeding speed according to the parameters monitored in real time, and it is ensured that reaction in the furnace is conducted in the optimal state; smelting hot air is filtered through the filter box and then discharged into the mixing box through the centrifugal suction pump, raw materials are scooped up and fall down while mechanical mixing is conducted, the sufficient mixing and preheating effect is guaranteed in cooperation with hot air introduction, and finally the effects of improving the heat source utilization rate, sufficiently mixing and preheating and efficiently smelting are achieved.

The invention relates to the technical field of metallurgical processes, and discloses a rolling process of high-vanadium low-silicon manganese alloy steel, raw materials of the steel are designed, the raw materials comprise basic metal and alloy elements, smelting is performed according to the designed raw materials to obtain a primary bar shape, an alloy steel bar is moved into an induction heating furnace to be preheated, and the alloy steel bar is cooled to the room temperature to obtain the high-vanadium low-silicon manganese alloy steel. The preheated alloy steel bar is moved into a line rolling machine, deformation system parameters are designed, the rolling temperature, speed and roll gap parameters are adjusted, confirmation and checking are conducted again according to the deformation system, the rolling temperature, the speed and the roll gap parameters designed in the previous step, after all the parameters are correctly set, equipment is started, and the rolling time is shortened; and meanwhile, real-time monitoring equipment is arranged to adjust parameters in the rolling process so as to maintain proper rolling conditions, when the rolling temperature is too high or too low, monitoring information is transmitted to the cooling water automatic control system through a network, the flow of cooling water is automatically adjusted, and the phenomenon of overheating in the steel forming process can be avoided in the adjusting process.

The invention belongs to the technical field of cold forging steel manufacturing, and particularly discloses a production method of high-aluminum cold forging steel for medium-strength and high-strength standard parts, which comprises the following steps: controlling the slag alkalinity, the contents of C, S and P in molten steel, the tapping temperature, the thickness of a steel ladle slag layer and the tapping time during converter smelting; a deoxidizing agent, lime, low-carbon ferromanganese, silicon-manganese alloy, aluminum-iron alloy and a carburant are added, argon is blown into molten steel when calcium-iron wires are fed in an argon blowing station, components of a refining slag modifier are controlled to be added during LF refining, calcium carbide and the aluminum-iron alloy are added according to the oxygen content and the aluminum content in the molten steel, a tundish for continuous casting is protected by argon, and the molten steel is continuously cast. The thickness of a powder slag layer and the thickness of a liquid slag layer are controlled, a covering agent is added into the tundish, the purity of molten steel is increased by adjusting the whole process section, and therefore follow-up tundish nozzle nodulation is reduced, and the problem that in the prior art, due to the fact that the purity of molten steel is low, a high-aluminum cold heading steel casting continuous casting tundish nozzle is prone to nodulation is solved.

An energy-saving silicon-manganese alloy casting device and a production method using same. The device comprises a ladle shell, wherein lifting mechanisms are provided at two ends of the ladle shell, and a sealing protection mechanism is provided at the top of the outer wall of the ladle shell; a plugging mechanism is provided in the middle of one side of the ladle shell, and a bearing protection mechanism is provided at the bottom of the outer wall of the ladle shell; and a molten iron port is fixed to and in communication with the bottom of one side of the ladle shell, and an internal brick tube is connected to the molten iron port. The plugging mechanism connected to the ladle shell can ensure the sealing of the molten iron port, and the plugging mechanism cooperates with the bearing protection mechanism to ensure a casting process. Producing a silicon-manganese alloy by means of side casting can ensure the stability of the casting flow and pressure and improve the product quality, and can also avoid frequent motions of a ladle and facilitate the treatment of a flue gas produced by the device; and the plugging mechanism cooperates with the bearing protection mechanism, and thus an operator can easily control the outflow of molten iron to ensure the casting process.

The invention discloses a production method for improving the manganese sulfide form of a medium-carbon high-sulfur free-cutting steel wire rod and the medium-carbon high-sulfur free-cutting steel wire rod, and the production method comprises the following steps: adding a silicon-manganese alloy and a high-manganese alloy into molten steel for deoxidation alloying in the tapping process of a converter or an electric furnace, and adding lime, ferro-aluminum is not used in the tapping process, and the oxygen content of molten steel in an argon station behind the furnace is 20-40 PPm; lime, calcium carbide and ferrosilicon powder are adopted for slagging in the refining process, and aluminum-containing materials are strictly prohibited from being adopted; the refining outbound oxygen content is controlled to be 10-25 PPm; a weak cooling and slow drawing process is adopted for continuous casting, and the degree of superheat of molten steel is controlled to be 25-35 DEG C in the continuous casting process; during hot rolling, rolling is carried out by adopting 60-70% of large rolling reduction from initial rolling to 1080 DEG C; according to the method, the manganese sulfide form and distribution state of the medium-carbon high-sulfur free-cutting steel can be improved, the cutting performance of the medium-carbon high-sulfur free-cutting steel wire rod is improved, and the machining cracking rate is reduced.

The invention discloses low-carbon emission reduction equipment and a carbon emission reduction method for treating pollutants in silicon-manganese alloy production, and relates to the technical field of wastewater treatment. The low-carbon emission reduction equipment for treating pollutants in silicon-manganese alloy production comprises a heavy metal removal mechanism, the heavy metal removal mechanism comprises a reaction tank, the reaction tank serves as a reaction place of wastewater and a heavy metal trapping agent, heavy metal ions in the wastewater react with the heavy metal trapping agent to generate water-insoluble macromolecular chelated salt, and the water-insoluble macromolecular chelated salt is separated from the reaction tank; floccules are formed; the cavity rotating shaft is arranged in the central area in the reaction tank; according to the low-carbon emission reduction equipment for treating pollutants in silicon-manganese alloy production and the carbon emission reduction method, the filter screen can realize separation of floccules and wastewater in the stirring process, and the separation of the floccules and the wastewater can be finished after the stirring is finished, so that the wastewater treatment process is accelerated, a subsequent filtering mechanism does not need to be arranged, and the cost is reduced. The equipment size is reduced.

The utility model relates to the technical field of silicon-manganese alloy smelting, and discloses a quantitative adding device for silicon-manganese alloy smelting, which comprises a smelting main body, the upper end of the smelting main body is communicated with a quantitative box, the middle part of the quantitative box is provided with a quantitative cavity, and an adjusting column is rotationally arranged in the quantitative cavity. According to the technical scheme, the adjusting ring can push the wedge-shaped extrusion plate to rotate, the wedge-shaped extrusion plate extrudes the first air bag, air in the first air bag is exhausted into the second air bag through the air pipe, the second air bag is expanded, and therefore the occupied space in the partition plate is adjusted; the quantitative adding amount is further adjusted in practical application, silicomanganese powder additives of different specifications can be conveniently added, the smelting efficiency is further improved, due to the cooperation of a partition plate and a second air bag, the arc-shaped second air bag can reduce the situation that the silicomanganese powder additives are stored in a gap between the partition plate and a connecting base, and the smelting efficiency is improved. And the silicon-manganese powder additive is further conveniently discharged.

The utility model discloses a nitrogen making device for silicon-manganese alloy smelting. The nitrogen making device comprises a flow dividing pipe, a first flow dividing box, a second flow dividing box, a third flow dividing box and a gas inlet pipe. According to the nitrogen making device for silicon-manganese alloy smelting, a concentric-square-shaped supporting plate is provided with an inert ceramic ball layer and a carbon molecular sieve layer, the inert ceramic ball layer is arranged in a gradient magnetic field, the bottom of an adsorption tank is evenly and fixedly connected with flow dividing pipes in a penetrating mode, and the bottom ends of the four adjacent flow dividing pipes are jointly and fixedly connected with a first flow dividing box communicating with the four flow dividing pipes; the bottoms of the four adjacent first flow dividing boxes are jointly and fixedly connected with second flow dividing boxes communicating with the four first flow dividing boxes, the bottoms of the second flow dividing boxes are jointly and fixedly connected with third flow dividing boxes communicating with the second flow dividing boxes, and the bottoms of the third flow dividing boxes are fixedly connected with air inlet pipes communicating with the third flow dividing boxes. The shunt pipes are uniformly distributed at the bottom of the adsorption tank to form a uniform air outlet effect, so that an array type uniform air outlet effect can be formed at the bottom of the adsorption tank through the single air inlet pipe.

The utility model relates to the technical field of silicon-manganese alloy smelting, in particular to a reducing agent proportioning device for silicon-manganese alloy smelting, which comprises a base, support plates are fixed on two sides of the top of the base, a stirring box is rotatably mounted between the two support plates, a first servo motor is fixed on the outer wall of one support plate, and a second servo motor is fixed on the outer wall of the other support plate. A transmission shaft of the first servo motor penetrates through the supporting plates and is fixedly connected with one end of the stirring box, a stirring motor is fixed to the outer wall of the other supporting plate, and a transmission shaft of the stirring motor penetrates through the supporting plates and the end face of the stirring box and is fixedly connected with a rotating shaft. Raw materials are guided into the hoppers, then the hoppers are driven by the electric sliding blocks to move along the sliding rails, so that the two hoppers can alternately spread the materials layer by layer into the stirring box, preliminary mixing is achieved through lifting during stirring, the stirring time can be greatly shortened when the motor drives the stirring rod to stir in the later period, and the stirring efficiency is improved. Therefore, the proportioning and mixing efficiency can be effectively improved, and meanwhile, the stirring and mixing sufficiency can be improved.

The utility model relates to the technical field of silicon-manganese alloy cooling, and discloses a silicon-manganese alloy granulation rapid cooling tower which comprises a storage barrel, a first partition plate is fixedly connected to the middle of the inner wall of the storage barrel, a compressor is fixedly connected to the left side of the top of the first partition plate, and a connecting pipe is fixedly connected to the top of the compressor. A condenser is fixedly connected to one end of the connecting pipe, a water pump is fixedly connected to the right side of the top of the first partition plate, a water outlet pipe is fixedly connected to the front end of the water pump, a water suction pipe is fixedly connected to the top of the water pump, and a cooling box is fixedly connected to one end of the water suction pipe; the right end of the water injection pipe is fixedly connected with the bottom of the left side of the outer wall of the cooling box. According to the utility model, a refrigerant is compressed through the compressor, the refrigerant is sent to the condenser through the connecting pipe for heat exchange, the water pump is started, and the cooling liquid subjected to cooling treatment in the cooling box is sucked back through the water suction pipe.

To provide a method and an apparatus for producing carbon-recovering type manganese-based alloys by which the reduction of CO2 discharge is made possible.SOLUTION: A method for producing a carbon-recovering type manganese-based alloy includes a step (A) of charging a manganese ore-derived raw material having a manganese oxidation degree of 1.0 to 1.1 and a carbonaceous material into an electric furnace to perform refining, and then performing slag / metal separation, and a step (B) of producing a synthetic fuel using carbon monoxide contained in a by-product gas generated from the electric furnace as a raw material.SELECTED DRAWING: None

The utility model provides a silicomanganese alloy flue gas waste heat recovery heating device, and relates to the field of flue gas waste heat recovery, the silicomanganese alloy flue gas waste heat recovery heating device comprises a recovery mechanism, the upper side of the recovery mechanism is provided with a filtering mechanism, the filtering mechanism is internally provided with a switching mechanism, and the upper side of the switching mechanism is detachably provided with three first filter elements; two supporting and adjusting mechanisms are detachably mounted outside the recycling mechanism, and second filter elements are arranged on the upper sides of the supporting and adjusting mechanisms. Through cooperation of the driving motor, the transmission gear, the teeth, the rotating table and other structures, the multiple first filter elements can be integrated in the mounting pipe in a circumferential array mode, when the filtering efficiency is reduced due to blockage of a certain filter element, the driving motor only needs to be started through an external controller, the rotating table can be driven to rotate, and the filtering efficiency is improved. The standby filter element is quickly switched to the working position, shutdown or disassembly is not needed in the process, and the problems that a filter element of a traditional structure is tedious in replacement operation, time-consuming and labor-consuming are solved.

The utility model discloses a manganese alloy additive forming die which comprises stamping equipment and a die plate, fixing bases are evenly distributed at the bottom of the stamping equipment, stamping bases are detachably installed at the bottoms of the fixing bases, the die plate is arranged below the stamping bases, die holes are formed in the die plate, and the die holes and the stamping bases are arranged in a one-to-one correspondence mode. A first supporting plate is arranged below the mold plate, an ejection mold block is arranged at the position, located below the mold hole, of the first supporting plate, a stamping base is detachably installed at the bottom of the fixed base, and the stamping base is stamped into the mold hole and extrudes the ejection mold block, so that manganese alloy stamping forming machining is achieved, stretching and retracting of a first telescopic rod are achieved, and the mold plate is pulled down. And the ejection mold block is ejected into the mold hole, so that the formed manganese alloy block is ejected out, and the demolding production of the manganese alloy block is realized.

The present invention provides a production method for reducing the incidence of edge cracks of Q235 wide and thick slabs, comprising the following steps: (1) converter smelting, with an iron-steel ratio of 850 kg / t, and adding silicon-manganese alloy and ferrosilicon weak deoxidation during the steel tapping process; (2) adding fluorite, lime, calcium carbide, and Taiwan aluminum to LF for strong stirring to promote sufficient pre-melting of the slag, diffusion deoxidation, and then power supply to form white slag, with the LF outlet composition controlled as follows: C: 0.15-0.18%, Si: 0.15-0.30%, Mn: 0.55-0.65%, P≤0.035%, ALs: 0.007-0.015%, S≤0.010%; (3) continuous casting process :A. The cross-section of the slab casting machine is 300mm×2200mm, and the casting speed is 0.80m / min; B. An immersion nozzle with an outlet inclination angle of 12°, an area of ​​4500 square millimeters, and an insertion depth of 110-140mm is adopted; C. Low melting point, low alkalinity, and low viscosity mold slag is used to slow down heat transfer; D. Weak cooling is adopted for secondary cooling water distribution; E. The side taper of the crystallizer is 1.2%; F. The sum of the inner and outer arcs of the wide surface taper of the crystallizer is controlled at 1.6-2.4mm, and the inner and outer arcs are both controlled at 0.8-1.2mm. The method of the present invention can reduce the incidence of subcutaneous cracks on the edge of Q235 wide and thick slabs to below 1%.

The application belongs to the technical field of metallurgy, and discloses a high-purity raw material low-carbon silicon-manganese alloy precise smelting method. The method adds 0.1%-0.3% of nano CaO-Al2O3 composite catalyst in electrolytic manganese, silica and semi-coke raw materials, and then smelts in stages in an inert atmosphere ore-heating electric furnace after mixing and briquetting; the catalyst forms CaAl2O4 active phase at 1550-1650 DEG C, selectively adsorbs and activates SiO2, and reduces the reduction activation energy of SiO2 by 46.4%, while Fe2O3 is inhibited from reduction due to difficult adsorption. The application breaks through the inherent constraints of thermodynamics and kinetics in traditional silicon-manganese alloy smelting by constructing a nano catalyst-selective reduction technology paradigm, significantly reduces energy consumption and carbon emissions, and simultaneously realizes the multiple goals of low carbonization, high purification and greenization without sacrificing production efficiency.

The invention relates to the technical field of silicon-manganese alloy processing, and discloses a low-carbon silicon-manganese alloy processing mixing feeding device which comprises a conveyor, a mixing conveying assembly is arranged on one side of the conveyor, the conveyor comprises a fixed support, a groove-shaped conveying belt is arranged at the upper end of the fixed support, and a closed shell is fixedly arranged on the outer side of the groove-shaped conveying belt; a plurality of groups of discharging hoppers are fixedly mounted at the upper end of the closed shell, a discharging assembly is fixedly mounted at the output end of the groove-shaped conveying belt, and a driving motor is linked with a U-shaped connecting rod to drive a wavy mixing pipeline to achieve periodic movement that the upper section moves downwards to stretch a corrugated pipe and the lower section is lifted upwards to support the pipeline; the materials are disturbed by axial push-pull shearing force, radial centrifugal overturning force and local air pressure, so that the mixing uniformity of the materials is improved to 85% or above from the existing lower than 65%, the form of each material is not changed in the whole process, and the processing key parameters such as the granularity and the density of the raw materials are not influenced.

The invention discloses a method for producing a silicon-manganese alloy by using electrolytic manganese sulfide slag. The method comprises the following steps: mixing the sulfide slag with coke or fine coal in proportion, calcining at high temperature, gradually heating in the process to remove crystal water, and carrying out decomposition, oxidation and reduction reactions. Sulfur dioxide gas generated in the calcining process is collected and converted into industrial sulfuric acid. And the calcined manganese-rich slag is used for producing the silicon-manganese alloy. The method has the beneficial effects that the valuable elements in the vulcanized slag are efficiently recycled, the environmental pollution is reduced, the economic benefit is improved, the sustainable development is promoted, the treatment efficiency is improved, the aims of comprehensive utilization and environmental protection of the vulcanized slag are achieved, and an effective solution is provided for industrial production.

The invention discloses a low-energy-consumption submerged arc furnace for producing silicon-manganese alloy, and relates to the technical field of submerged arc furnaces. The low-energy-consumption submerged arc furnace for producing the silicon-manganese alloy comprises a submerged arc furnace body and further comprises a self-baking electrode, one end of the self-baking electrode is inserted into the submerged arc furnace body, the other end of the self-baking electrode is exposed above the submerged arc furnace body, an electrode shell is welded to the upper end of the self-baking electrode, die holes are evenly formed in the side wall of the electrode shell, electrode paste is sintered in the electrode shell, and the die holes are formed in the side wall of the electrode shell. The length of the self-baking electrode is continuously increased; the grooving die head is positioned on the periphery of the electrode shell; according to the self-baking electrode in the low-energy-consumption submerged arc furnace for producing the silicon-manganese alloy, the electrode length is increased by sintering the electrode paste in the electrode shell, the conductive fins can be reused, the replacement period of the conductive fins is greatly prolonged, and the cost is saved; therefore, large holes do not need to be formed in the furnace cover, and the amount of spark spraying in the furnace is greatly reduced.

To provide a manufacturing method of very low carbon ferromanganese that makes it possible to reduce CO2 exhaust in manufacture of ferromanganese and its manufacturing apparatus.SOLUTION: A method for producing an extremely low carbon manganese-based alloy, comprises: a step (1) of carbon-reducing manganese ore or reduced manganese ore; a step (2) of performing molten slag-metal separation; and a step (3) of reducing the separated molten slag with a non-carbon reductant to perform refining, followed by slag-metal separation.SELECTED DRAWING: None

The invention provides high-nitrogen vanadium steel and a preparation method thereof.The preparation method comprises the following steps that raw materials of the high-nitrogen vanadium steel are subjected to converter smelting and ladle refining, and refined molten steel is prepared; the components of the refined molten steel contain nitrogen and vanadium; the refined molten steel is sequentially subjected to casting treatment and rolling treatment, and the high-nitrogen vanadium steel is prepared; wherein steel coke powder is added to the bottom of a steel ladle before ladle refining is carried out on molten steel obtained after converter smelting, and in the tapping process of converter smelting, the following steps are carried out: when 1 / 4 of the weight of steel is tapped, a silicon-aluminum-calcium deoxidizing agent is added to the steel flow, and when 2 / 3 of the weight of the steel is tapped, a silicon-manganese alloy and a high-carbon manganese-iron alloy are added to the steel flow; the temperature of the rolling treatment is 810-850 DEG C; according to the preparation method, the combination amount of nitrogen and vanadium can be increased, so that the mechanical property of the high-nitrogen vanadium steel is improved.

The utility model provides a hot charging and hot conveying device of a large silicon manganese ore heat furnace. The hot charging and hot conveying device for the large-scale silicon manganese submerged arc furnace comprises a rail conveying vehicle body used for conveying silicon manganese alloy materials processed by the submerged arc furnace; the rail transfer cart comprises a rail transfer cart body and two mounting plates arranged on the rail transfer cart body, connecting shafts are rotatably mounted on the two mounting plates, a hot delivery box used for hot charging and hot delivery of silicon-manganese alloy materials processed by a submerged arc furnace is fixedly mounted on the two connecting shafts, and a feeding pipe is arranged on the hot delivery box. According to the hot charging and hot conveying device of the large-scale silicon-manganese hot furnace, hot charging and hot conveying treatment can be conducted on silicon-manganese alloy raw materials processed by the silicon-manganese hot furnace, meanwhile, the problem that the silicon-manganese alloy raw materials make contact with oxygen to be oxidized in the conveying process can be avoided, the safety of hot charging and hot conveying of the silicon-manganese alloy raw materials is improved, and discharging is convenient.

The present application relates to the technical field of metallurgical chemical industry, in particular to a silicon-manganese alloy smelting method, comprising the following steps: raw material pretreatment, gradient reduction smelting, tapping and refining, and flue gas slag cooperative treatment.In the silicon-manganese alloy smelting, lanthanum cerium oxides in the rare earth composite material react with impurities such as sulfur, phosphorus and oxygen in the melt at high temperature, forming high-melting-point compounds and separating with the molten slag, effectively reducing the impurity content, at the same time, the rare earth elements segregate at the grain boundaries, inhibiting atomic diffusion and migration, significantly refining the alloy grain size, and the rare earth composite material is optimized through the dual action of chemical purification and physical modification, solving the problems of impurity segregation and insufficient toughness in the traditional silicon-manganese alloy smelting process, and significantly improving the mechanical properties of the silicon-manganese alloy.

The application discloses a kind of high-strength packing belt raw material steels with strength above 1000MPa, which is characterized in that the chemical components are as follows: C: 0.19-0.25%, Si: 0.05-0.30%, Mn: 1.20-1.57%, P≤0.030%, S≤0.025%, Alt: 0.020-0.050%, Ca: 0.0008-0.0020%, and the balance is Fe and inevitable impurities; and a specific production method is also disclosed. The purpose of the application is to provide a kind of high-strength packing belt raw material steels with strength above 1000MPa and its production method. By adding carbon, silicon, manganese alloying elements to strengthen the design mechanism, using low-temperature controlled rolling and controlled cooling process for hot rolling, and using more than 70% high-pressure reduction ratio for pickling, a high-strength packing belt raw material steel with 1000MPa high strength and certain elongation is obtained.

The invention discloses a polyurethane flame-retardant sound-insulation composite board with a multi-layer structure and a preparation method thereof, and belongs to the technical field of composite boards, nickel nitrate is used as a nickel source, ferric nitrate is used as an iron source, nickel ferrite powder is obtained through a solvothermal method and a high-temperature calcination method, the nickel ferrite powder is compounded with graphene oxide to obtain composite aerogel powder, the surface of the composite aerogel powder is coated with polydopamine, and the flame-retardant sound-insulation composite board with the multi-layer structure is obtained. The enhanced aerogel powder is obtained; the preparation method comprises the following steps: preparing functional rigid polyurethane foam from polyether polyol, polymethylene polyphenyl polyisocyanate, enhanced aerogel powder, ammonium polyphosphate, magnesium hydroxide and a foaming aid through a one-step foaming method, putting the functional rigid polyurethane foam as a core layer between an aluminum-magnesium-manganese alloy color steel plate and a porous sound insulation plate, and carrying out hot-pressing compounding, so as to obtain the aluminum-magnesium-manganese alloy color steel plate / porous sound insulation plate. The polyurethane flame-retardant sound-insulation composite board with the multi-layer structure is obtained; and comprehensive improvement of flame retardance, sound insulation, heat insulation, electromagnetic shielding and dimensional stability is realized.

The invention discloses a nickel-iron-chromium-aluminum-manganese alloy and a preparation method thereof, and the nickel-iron-chromium-aluminum-manganese alloy comprises the following chemical elements in percentage by mass: less than or equal to 0.0500% of carbon, less than or equal to 0.6000% of silicon, less than or equal to 3.0000% of manganese, less than or equal to 0.0250% of phosphorus, less than or equal to 0.0200% of sulfur, less than or equal to 8.0000% of nickel, 20.00000%-27.0000% of chromium, 7.0000%-7.5000% of aluminum and the balance of iron. According to the nickel-iron-chromium-aluminum-manganese alloy prepared by adopting the formula and the method disclosed by the invention, the highest resistivity can reach 1.65 omega.m, the resistivity is effectively improved, the efficiency of converting electric energy into heat energy is higher, meanwhile, the nickel-iron-chromium-aluminum-manganese alloy can pass a 24-hour salt spray test, and the high resistivity of the nickel-iron-chromium-aluminum-manganese alloy allows a shorter or finer alloy material to reach a target resistance value; and the cost of raw materials is reduced, a more compact heating unit can be designed in a space-limited scene (such as a small electric appliance), and the lightweight design is realized.

The application discloses a method for analyzing silicon nitride manganese alloy by glass melting X-ray fluorescence spectrum, and comprises the following steps: step one, mixing a sample and an oxidizing agent and placing them in the middle of a platinum yellow crucible with a flux on the bottom; step two, placing the sample in an electric heating automatic melting furnace to prepare a to-be-detected glass disc by borate melting; step three, completely melting, automatically casting, cooling the sample disc, demolding and obtaining a glass disc for X fluorescence analysis; and step four, optimizing analysis parameters, establishing a working curve, performing sample analysis and obtaining the content of measured elements. The application relates to the technical field of metallurgical chemical analysis and detection, and particularly relates to a method for analyzing silicon nitride manganese alloy by glass melting X-ray fluorescence spectrum.

This application provides a method for smelting a low-phosphorus silicon-manganese alloy, comprising: obtaining raw materials for smelting the low-phosphorus silicon-manganese alloy and pretreating the raw materials to obtain smelting raw materials; adding the smelting raw materials to an electric furnace for smelting to obtain a first low-phosphorus silicon-manganese alloy liquid; transferring the first low-phosphorus silicon-manganese alloy liquid to a shaking ladle and reacting for a first preset time to obtain a second low-phosphorus silicon-manganese alloy liquid; transferring the second low-phosphorus silicon-manganese alloy liquid to a ladle, spraying a first dephosphorizing agent into the ladle for a second preset time, allowing it to stand for a third preset time, and then removing slag to obtain a third low-phosphorus silicon-manganese alloy liquid; pouring the third low-phosphorus silicon-manganese alloy liquid into a mold to cast an ingot, and demolding it after cooling to obtain the finished low-phosphorus silicon-manganese alloy. This application, through pretreatment, shaking ladle operation, and spraying of the first dephosphorizing agent, reduces the phosphorus content and impurities in the finished low-phosphorus silicon-manganese alloy, thereby improving the purity of the finished low-phosphorus silicon-manganese alloy.

The present invention relates to the technical field of copper and its alloy processing, and specifically to a rolling processing method for copper and its alloy heterogeneous alloy composite foil. Rolled pure copper plates and copper-manganese alloy plates are used as raw materials, wherein the copper-manganese alloy plates can be copper-rich or manganese-rich. The rolled pure copper plates and copper-manganese alloy plates are surface-polished and spot-welded, and then diffusion-connected in a hot pressing furnace. The connected composite plates are hot-rolled and surface-polished, and then annealed in a vacuum heat treatment furnace. The annealed composite plates are cold-rolled on a continuous rolling mill at room temperature, and the cold-rolled composite foil is vacuum-heat-treated and annealed, and then stretched, bent, straightened, and strip-cut to obtain a finished composite foil. Thus, the problem that the application of pure metal foils in the prior art restricts the update and iteration speed of related products and cannot meet the requirements for further processing of the foils is solved.