436 results about "Dross" patented technology

The invention discloses a treatment device and method for lead electrolysis anode copper removal scum, and relates to the technical field of lead electrolysis anode copper removal scum treatment.The treatment device comprises a cylindrical shell, the outer wall of the cylindrical shell is fixedly sleeved with a pair of annular grooves, a plurality of evenly-distributed exhaust holes are formed in the annular grooves, and material blocking nets are installed in the exhaust holes; the pair of annular grooves are communicated through a gas collecting pipeline; by arranging the shell, a closed space is provided for scum treatment, harmful gas leakage is avoided, the effect that scum and decomposition liquid are fully mixed and reacted is promoted through cooperation of internal structural components of the shell, uniform dispersion and guiding of the scum are achieved by arranging the scum distributing mechanism, the distributing uniformity and continuity are guaranteed, and the service life of the scum is prolonged. And by arranging the scum treatment mechanism, the effects of efficiently decomposing, filtering and separating scum, promoting sufficient mixing of the scum and decomposition liquid, improving the decomposition efficiency, preventing material screening holes from being blocked and ensuring continuous proceeding of the filtering process are achieved.

The invention provides a method for improving the high-temperature crack resistance of a cupronickel alloy based on addition of an alterant, which comprises the following steps: S1, heating a cupronickel alloy raw material until the cupronickel alloy raw material is completely molten; s2, scum in the metal solution is fished out; s3, adding a copper-magnesium alloy; s4, adding pure titanium, and fully melting and reacting the pure titanium through stirring; s5, scum in the metal solution is fished out; s6, casting after the furnace front analysis is qualified; s7, obtaining a cupronickel alloy round ingot or flat ingot; the copper-magnesium alloy is added as a deoxidizing agent, so that the oxygen content of a metal solution can be reduced, oxygen is prevented from reacting with alloy elements to generate inclusions, the purity of the alloy is improved, and the crack resistance of the alloy is enhanced; the fine and uniform grain structure can effectively improve the high-temperature plasticity of the cupronickel alloy, reduce grain boundary defects, improve the high-temperature crack resistance of the cupronickel alloy and avoid cracking under high-temperature forging or hot rolling.

The invention relates to the technical field of steel rolling, in particular to a hot dipping production method of a high-grade surface aluminum-zinc plated steel plate, which comprises the following steps of: arranging a heating device and a temperature detection device on a lower chute of an annealing furnace, calling a temperature set value of the lower chute of the annealing furnace as a control value according to the thickness of strip steel, and adjusting the power of the heating device according to an actual value of the temperature detection device; the temperature of the lower chute of the annealing furnace is constant; the strip steel is in a non-shaking state according to the magnetic adsorption torque; the Fe element is promoted to be separated out in the form of zinc slag by utilizing a mode of repeatedly increasing and decreasing the temperature of a plating solution in a production intermission period; and the concentration of the finishing liquid is judged through an on-line conductivity detection device. The method has the advantages that on the premise that equipment investment is not greatly increased, the occurrence probability of the problems such as uneven spangles on the surface of the high-grade surface hot-dip aluminum-zinc product, zinc dross, zinc ash and finishing chromatic aberration which seriously affect the surface quality of the product is reduced, high-quality and high-efficiency production of the high-grade surface hot-dip aluminum-zinc product is achieved, and the production cost is reduced. And stable operation of the unit and product quality meeting requirements are ensured.

The invention relates to the technical field of metal-based composite materials, and discloses a preparation method of a high-dispersity silicon carbide reinforced aluminum-based composite material, which comprises the following steps: heating and melting an aluminum alloy material, and then vacuumizing; the stirring mechanism extends into the alloy liquid by a specified depth, and the stirring mechanism is started to perform vacuum high-temperature stirring; adding a modificator A, and continuously performing vacuum high-temperature stirring to perform first modification; the pretreated SiC particles are spread on the aluminum alloy liquid at a constant speed; after stirring is completed, a modifier B, a refiner and a deslagging agent are added, and secondary modification, refinement and deslagging are conducted; and releasing vacuum, treating attachments and dross on the surface of the melt, and discharging to cast a product or a cast ingot. According to the preparation method, the addition amount of the SiC particles can be increased to 40%, the dispersion uniformity can be improved to more than 95%, the wettability of the SiC particles can be remarkably improved, and the porosity and oxide inclusion can be reduced, so that the comprehensive performance of the composite material can be improved.

The invention relates to the technical field of aluminum alloy smelting, in particular to an aluminum alloy smelting furnace deslagging device which is characterized in that a moving frame is arranged on the outer side of a smelting furnace, a lifting mechanism is arranged on the moving frame, and a deslagging mechanism is arranged on the lifting mechanism; through cooperation of the lifting mechanism and the slag discharging mechanism, the operation radius of operators can be enlarged, threats to the operators caused by splashing of high-temperature molten aluminum are avoided, and the purpose of stably covering the fished dross can be achieved; through cooperation of the lifting mechanism and the slag discharging mechanism, dross on the surface of molten aluminum can be guided and driven to the edge of the smelting furnace in the slag salvaging process, and the dross is rapidly gathered to the edge of the smelting furnace; through cooperation of the moving frame and the slag discharging mechanism, flexible moving and receding of the slag discharging mechanism can be achieved, so that development of other procedures in the aluminum alloy smelting process is facilitated, stable positioning of the slag discharging mechanism can be achieved, and auxiliary dumping of fished-up dross can be achieved.

The invention discloses a method for recovering indium from an indium-containing anode bag and indium-containing waste materials, and belongs to the technical field of resource recycling and reutilization. The indium-containing anode bag is pyrolyzed, then a pyrolysis precursor, fused salt and indium-containing waste material powder are evenly mixed and calcined, the anode bag not only contains a large amount of indium but also contains a large amount of carbon element, and therefore the indium-containing anode bag can be recycled. The preparation method comprises the following steps: calcining indium in a calcining furnace, effectively improving the reduction effect and reducing the loss rate of indium metal in the calcining process under the combined action with molten salt, respectively recovering and purifying indium-containing scum and indium alloy, carrying out acid leaching on the indium-containing scum, carrying out selective adsorption and desorption on indium by using resin to obtain an indium-containing solution with low impurity content, distilling the indium alloy, and recycling the indium-containing solution. And crude indium is obtained.

The invention discloses a refining impurity cleaning and removing process for secondary copper, which comprises the following steps: (a) pretreatment melting: melting a secondary copper raw material to form copper liquid, and controlling the temperature to be 1150-1250 DEG C; (b) oxidizing and slagging: introducing oxygen-containing gas into the copper liquid for 20-40 minutes to oxidize impurity elements to form scum; according to the refining impurity cleaning and removing process for the secondary copper, As and Sn are converted into high-valence oxides through oxidation, then a low-melting-point borate slag system is formed through borax in the composite flux, and efficient trapping of impurities is achieved. The mass transfer process is enhanced, flux agglomeration is avoided, and the impurity removal rate is increased by 30% or above. The borax / calcium fluoride combination significantly reduces the melting point of the slag system (actually measured lt; and the lead and tin removal efficiency is improved.

The invention relates to the technical field of aluminum alloy ingot preparation, and discloses a high-temperature-resistant aluminum alloy ingot and a preparation method thereof. The preparation method comprises the following steps: firstly, setting chemical components in a high-temperature-resistant aluminum alloy ingot in percentage by weight to obtain preparation raw materials; preparing raw materials are put into a smelting furnace, an improved differential evolution algorithm is used for optimizing the stirring speed and the heating speed of the smelting furnace, so that the preparing raw materials are completely melted, a prepared melt is obtained, meanwhile, a refining agent is added into the prepared melt, standing is conducted, dross is collected, and a refined melt is obtained; and the casting temperature is controlled through a thermocouple multi-point calibration method, the refined melt is poured into a preheated mold, and the high-temperature-resistant aluminum alloy ingot is obtained after cooling and solidification. The high-temperature-resistant aluminum alloy ingot is obtained through burdening, smelting, refining and casting, the purpose of preparing the high-temperature-resistant aluminum alloy ingot is achieved, and the method is objective and accurate.

The invention provides an energy-saving smelting furnace structure, and relates to the technical field of smelting furnaces, the energy-saving smelting furnace structure comprises a smelting furnace body, a lifting furnace cover is arranged above the smelting furnace body, a waste residue storage box is fixedly connected to the side surface of the smelting furnace body, a furnace cover bracket is vertically welded above the lifting furnace cover, and a lifting push cylinder is fixedly connected above the furnace cover bracket; the smelting furnace has an automatic slag salvaging function, slag is discharged to the slag storage box through the slag discharge port when the smelting furnace is closed, floating impurities in molten liquid are removed, the cover does not need to be opened manually to remove the floating slag, heat loss in the smelting furnace opening process is reduced, energy consumption of the smelting furnace is reduced, and the problem that when an existing smelting furnace is used for smelting metal, the cost is low is solved. The problems that a furnace cover needs to be opened to add metal materials in the smelting process, heat loss is caused, energy consumption is not reduced, and in the metal smelting process, a smelting furnace needs to be opened to fish and separate dross floating on the upper layer, heat loss is caused, and energy consumption is not reduced are solved.

The invention relates to the technical field of electrolytic aluminum, and discloses a furnace cleaning and slagging-off device for electrolytic aluminum machining, which comprises a cleaning device, the cleaning device comprises two slagging-off mechanisms and a slag salvaging mechanism, the two slagging-off mechanisms are symmetrically arranged, and each slagging-off mechanism comprises a cover I and a hydraulic cylinder I which are hinged in an electrolytic furnace; a plurality of sets of slagging-off operation mechanisms are arranged on the inner side of the bottom of the slagging-off mechanism, each slagging-off operation mechanism comprises a swing arm with the action end moving along an elliptical track, a slagging-off plate is rotationally arranged on each swing arm, the slag salvaging mechanism comprises a second cover and a second hydraulic cylinder which are hinged to the interior of the electrolytic furnace, and a slag salvaging plate set and a guide frame are arranged at the bottom of the second cover; scum on the surface of molten aluminum is pushed to the slag salvaging plate set from the front side of the electrolytic furnace through the slagging-off plate of the slagging-off operation mechanism, the slag salvaging plate set drives the scum to be lifted and poured on the discharging table, and through the slagging-off mechanism and the slag salvaging mechanism which are symmetrically arranged, slagging-off operation can be conducted from the two sides of the electrolytic furnace at the same time.

The utility model relates to the field of molten aluminum crucibles, and discloses a molten aluminum crucible with a surface scum cleaning structure. The molten aluminum crucible with the surface scum cleaning structure comprises an equipment bottom plate, a plurality of rectangular supporting plates are fixedly connected to the upper end of the equipment bottom plate, a carrying plate is fixedly connected to the upper ends of the rectangular supporting plates, an annular plate is arranged at the lower end of the carrying plate, and a telescopic rod is slidably connected to the interior of the annular plate; a threaded opening is fixedly connected to the lower end of a telescopic rod, a worker can conveniently clean the used scum adhesion disc, connection between the telescopic rod and a lower annular plate is conveniently reinforced through a gasket, so that stable connection of equipment is guaranteed, and a rectangular supporting plate and a carrying plate can conveniently guarantee complete frame of the equipment; and by means of the annular plate, the position of the telescopic rod can be conveniently limited in an auxiliary mode.

The utility model relates to a casting slag stopping device, which is used for filtering and stopping scum on the surface of molten aluminum, and comprises a shunting bag and a slag stopping ring, the shunting bag is in a net bag shape, is convenient for filtering the scum and simultaneously is convenient for uniformly shunting the molten aluminum, the shunting bag is adjustably connected below a casting flow table, and the shunting bag is horizontally arranged; a slag blocking ring is further adjustably arranged below the casting flow table and horizontally arranged on the periphery of the flow dividing bag in a surrounding mode, scum in molten aluminum flowing out of the flow dividing bag can be conveniently intercepted, a distance exists between the slag blocking ring and the flow dividing bag, the intercepted scum is located in the distance range, and the slag blocking ring extends downwards into the continuous casting crystallizer. And the lower part of the slag stopping ring is immersed into molten aluminum in the continuous casting crystallizer. According to the utility model, scum is filtered through the shunting bag, and then the scum is gathered in a smaller range through the scum baffle ring, so that the scum is conveniently cleaned manually.

The invention discloses a two-stage spheroidizing process and processing equipment for a high-nickel austenite ductile iron valve rod nut, and belongs to the technical field of metal smelting, the two-stage spheroidizing process comprises the following steps: S1, preparing raw materials: low-sulfur and low-phosphorus pig iron, scrap steel, ferronickel, a silicon-magnesium-calcium spheroidizing agent and a 75 silicon-iron nucleating agent; the smelting furnace is started, and the low-sulfur and low-phosphorus pig iron, the waste steel and the ferronickel furnace charge are heated to be completely molten; s2, primary spheroidizing: after covering a nucleating agent, rapidly pouring high-temperature molten iron to initiate spheroidizing reaction and promote spheroidizing of graphite; the slagging-off mechanism is convenient and flexible to move, convenient to adapt to different smelting furnaces and casting ladles, convenient to use and capable of rapidly removing dross and rapidly cleaning slag charge, the slagging-off quality is improved, the slagging-off hopper and the striker plate are flexible and rapid to disassemble and assemble and convenient to replace, and the slagging-off efficiency is improved. And then smelting furnaces and molten iron casting ladles with different calibers can be conveniently adapted, so that the technical effect that the slagging-off working efficiency is effectively improved is achieved.

The invention discloses a preparation method for preparing oxygen-free copper through efficient impurity removal of recycled copper, which comprises the following steps: heating and melting the recycled copper to obtain a recycled copper melt, and determining the content of copper element by adopting spectral analysis; oxygen is continuously introduced into the regenerated copper melt, impurity removal agent powder is weighed according to the content of impurity elements and sprayed into the furnace together with the oxygen to react with impurities in the melt, and the regenerated copper melt subjected to impurity removal is obtained; continuously introducing natural gas melt into the regenerated copper melt subjected to impurity removal, weighing deoxidant powder according to oxygen content in the natural gas melt, and spraying the deoxidant powder into the furnace by using the natural gas to react with oxygen in the melt, so as to obtain a regenerated copper melt subjected to oxygen removal; and standing the deoxidized regenerated copper melt, removing scum in the melt, and casting to obtain an oxygen-free copper product. According to the method, the impurity removal agent and the deoxidant powder are used in a combined mode, the time needed by oxygen impurity removal and natural gas reduction is shortened, the quality of the molten copper is improved, consumption of production materials is reduced, the production efficiency is improved, the production cost and pollution to the atmospheric environment are reduced, and the method is suitable for large-scale application.

The invention provides a zinc dross self-cleaning inductor operation control method and device based on a circulating gully, and relates to the technical field of industrial smelting furnaces, the method comprises the following steps: step 1, monitoring the temperature of zinc liquid in a zinc pot in real time through a temperature sensor, and transmitting a temperature signal to a temperature control instrument; 2, the temperature control instrument processes the temperature signal according to a set threshold value and outputs a high-temperature signal or a low-temperature signal to the programmable logic controller; and step 3, the programmable logic controller controls the contactor group to switch the output voltage of the autotransformer based on the temperature signal, so that the inductor operates in a low-power, medium-power or high-power mode. Through real-time temperature control, automatic power regulation and circulating gully, the liquidity and heating efficiency of molten zinc are improved, zinc slag blockage and manual cleaning are reduced, the service life of the inductor is prolonged, and the product quality is stabilized.

The purpose of the present invention is to provide a hot-dip Al-Zn-Si-Mg-based steel sheet which has excellent surface appearance and in which the occurrence of wrinkle-like defects is suppressed without any defects such as scum defects. In order to achieve the purpose, the present invention is a hot-dip Al-Zn-Si-Mg-based steel sheet provided with a plating film, the plating film having a composition containing 45-65% by mass of Al, 1.0-3.0% by mass of Si, 1.0-10.0% by mass of Mg, and 0.01-0.5% by mass of Mn, with the remainder comprising Zn and unavoidable impurities, and the thickness of the plating film being within the range of 50 mm removed from both ends of the steel sheet, the thickness of the plating film being within the range of 50 mm removed from both ends of the steel sheet, the thickness of the plating film being within the range of 50 mm removed from both ends of the steel sheet, and the thickness of the plating film being within the range of 50 mm removed from both ends of the steel sheet. The height difference per 1 mm length of the surface of the steel sheet is 10 [mu] m or less.

The present application relates to a kind of bauxite clinker kiln method and system for disposing aluminum ash, belong to metallurgical environmental protection technical field, the method includes the following steps: pretreatment aluminum ash, obtain fine powder aluminum ash;Fine powder aluminum ash is added to bauxite slurry, so that fine powder aluminum ash and the dry raw material and calcined coal ash in bauxite slurry are mixed, and mixed sintering is carried out, and then cooling is carried out, to obtain clinker;The present application carries out resource utilization to aluminum ash, replaces part of aluminum ore, and is used in the production of aluminum-based new material product, while reducing the production cost of aluminum-based new material product, realizes the harmless treatment of aluminum ash.

The invention discloses a method for cooperatively treating dross through graded smelting and oxidizing roasting, and relates to the technical field of pyrometallurgy, and the method specifically comprises the following steps: (1) smelting copper dross, and settling lead liquid to obtain lower-layer metal lead and upper-layer dross; and (2) putting the upper-layer dross into a converter, and sequentially carrying out oxidizing roasting and reduction smelting to obtain copper matte and lead bullion. According to the method, a two-stage process framework for improving the copper grade through smelting pot layering and converter deep lead removal is created for the first time, natural sedimentation layering of the lead liquid and the waste residues is achieved through the smelting pot by means of the density difference of molten substances, and metal and impurity phases are effectively separated; by means of the method, the lead liquid closed-loop circulation system improves the lead recovery rate to 97% or above, and the final copper grade of matte is improved to 55%-65%.

The invention discloses refining equipment and a refining method for aluminum alloy in aluminum ash, and belongs to the technical field of aluminum ash treatment. The refining equipment comprises a storage frame with a movable rail at the lower end, first connecting plates with an infrared temperature sensor and an infrared moisture meter are arranged at the front end and the rear end of the storage frame respectively, and a transmission disc is arranged at the lower end of the storage frame. According to the aluminum slag refining device, the problem that an existing aluminum slag refining device cannot conduct corresponding-orientation conveying and corresponding treatment on humid and high-temperature aluminum slag is solved, an infrared temperature sensor and an infrared moisture meter can detect the state of the aluminum slag, and after it is detected that the temperature of the aluminum slag is high or the aluminum slag is humid, the aluminum slag can be subjected to corresponding-orientation conveying and corresponding treatment. And the storage frame can be dumped into the corresponding water-cooled roller cooler and the corresponding material rotary roller dryer for treatment, and the trend of intensification and cleanness of modern industrial equipment is met.

The application discloses a kind of waste copper pyrogenic regeneration intensive smelting device, including support, and for being arranged on the smelting furnace of support, copper water separation component, copper water shaping component, scraping component and lifting driver, copper water separation component and copper water shaping component are used to be sequentially arranged under smelting furnace, so that the copper water smelted by smelting furnace is separated by copper water separation component and then transmitted into each cavity of copper water shaping component to be shaped, scraping component includes multiple scrapers, transmission support rod for being connected with multiple scrapers, and guide support rod arranged on support, part of transmission support rod is slidably connected with guide support rod, wherein, lifting driver is used to drive copper water shaping component, scraper and transmission support rod to carry out synchronous lifting movement, by the setting, before copper water shaping, complete the separation process of dross, solve the removal mode of dross in the prior art, there is the technical problem of low efficiency and causing the risk of casualties of operating personnel.

The present invention relates to the field of antimony smelting, and specifically discloses a method for removing arsenic from arsenic-containing crude antimony. The method comprises stirring and refining the arsenic-containing crude antimony and an iron-loaded composite material in a protective atmosphere at a temperature of 750 to 1000°C, causing As in the arsenic-containing crude antimony and iron in the iron-loaded composite material to undergo an alloying reaction and form a slag containing an FeAs alloy. The slag is then skimmed to obtain an arsenic-removed antimony melt. The iron-loaded composite material comprises a carrier and an immobilized iron element thereon; and the density thereof is less than 3 g / cm 3 The mass of iron in the iron-loaded composite material is 1 to 2 times the theoretical amount required to transform As into FeAs. The new arsenic removal method proposed by the present invention has good arsenic removal effect, simple operation, low raw material price, and good application value.

The invention relates to the technical field of casting equipment, and particularly discloses a camshaft casting continuous production device and method.The device comprises an electric induction furnace and a slag salvaging mechanism, and the electric induction furnace comprises a furnace body and a support arranged on the furnace body and close to a furnace opening; the slag salvaging mechanism comprises an outer sleeve rotationally connected with the support, a spiral conveyor coaxially arranged in the outer sleeve, and at least one intermittent slag collecting assembly, wherein one end of the outer sleeve extends into the furnace body from the furnace opening. A slag inlet and a slag outlet are formed in the outer sleeve in the axial direction at intervals, the intermittent slag collecting assembly is constructed to continuously collect dross in molten iron in the furnace body and extrude the dross into the outer sleeve from the slag inlet, and the spiral material conveying machine is constructed to continuously convey the dross from the slag inlet to the slag outlet and discharge the dross, so that the time difference between manual slag salvaging and connection of previous and later procedures is effectively solved; the continuity of casting production is guaranteed, and the production efficiency is improved to adapt to the large-scale production requirement; and meanwhile, the consistency of the deslagging degree is ensured through automatic deslagging operation, and the stability of the quality of the camshaft blank is improved.

The application discloses a copper wire blank production method for a multi-head wire drawing machine, relates to the technical field of copper wire blanks, and comprises the following steps: selecting raw materials, equipment inspection and initial charging, preheating of a furnace system, copper material heating, melting and charging, copper liquid scum removal, copper liquid oxygen content control, continuous casting, pre-rolled piece trimming, continuous rolling, copper wire blank cooling, copper wire blank drying and copper wire blank protection, so as to obtain the copper wire blank. The copper wire blank obtained by the method effectively reduces the proportion of defects such as inclusions, cracks and pores in the obtained copper wire blank, the breaking rate of the copper wire blank in the multi-head wire drawing machine is obviously reduced, and the obtained copper wire blank is especially suitable for the production of the multi-head wire drawing machine.

The invention relates to a laterite nickel ore double-screw ore washing system which comprises a double-screw ore washer, a movable screen and a conveying belt, the double-screw ore washer is provided with a slurry outlet, the feeding end of the movable screen is connected with the slurry outlet, the movable screen screens slurry guided out through the slurry outlet, and the conveying belt is arranged on the conveying belt. The movable screen can drive materials screened by the movable screen to move from the feeding end to the discharging end of the movable screen, and the conveying belt is arranged on the lower side of the discharging end of the movable screen. Mineral aggregate is guided into the double-screw ore washer, the double-screw ore washer scrubs the mineral aggregate, scrubbed ore pulp flows to the movable screen from the pulp outlet, the movable screen screens the ore pulp, scum in the ore pulp is intercepted, and the scum falls onto the conveying belt and is conveyed to a designated position through the conveying belt.

The utility model relates to the field of metal recovery, in particular to a tin slag crushing, recovering and sorting treatment device. The utility model provides a tin slag crushing, recycling and sorting treatment device which can screen tin slag, separate and recycle metal elements in the tin slag, realize function integration and improve the resource recycling efficiency. A tin slag smashing, recycling and sorting treatment device comprises a working box, a fixing frame, a motor and the like, the fixing frame is connected to the upper portion of the left side of the working box, and the motor is connected to the lower portion of the fixing frame. According to the tin slag screening device, the extrusion rod makes contact with the rotating frame to drive the screening frame to move left and right on the guide rod, so that small tin slag falls on the collecting frame, large tin slag stays on the separating frame, metal elements are adsorbed on the magnetic separation plate, the tin slag can be screened, meanwhile, the metal elements in the tin slag are separated and recycled, and the tin slag screening efficiency is improved. And the effects of function integration and resource recovery efficiency improvement are achieved.

The application discloses a kind of electric power steel pipe tower whole hot-dip galvanizing device of galvanizing equipment technical field, including zinc bath and support rod, L type fixed rod fixedly connected in the support rod rear end, the L type fixed rod bottom end is fixedly connected in the zinc bath top, installation groove is set in the right end of the support rod, pin shaft is installed in the installation groove, guide rod is installed on the pin shaft, mounting plate is fixedly set in the zinc bath top one side, the mounting plate is provided with two groups, sprocket is installed on the mounting plate, two groups the mounting plate is all provided with sprocket, baffle is fixedly connected in the front end of the connecting rod, baffle lower half is stably immersed below zinc liquid level, uniform speed moves zinc liquid surface layer dross, and dross is continuously concentrated and pushed to zinc bath single side area, realize dross automation, regularity collection processing, effectively solve the problem that traditional manual salvage is not timely, cleaning is not thorough, liquid surface dross remains.

This utility model belongs to the field of ingot casting processing, specifically disclosing a water inlet structure for a smelting furnace. It includes a feed tank located at the furnace opening, with a feed inlet at the top and a cover for sealing it. A discharge outlet is located on the side of the feed tank, communicating with the furnace opening. The bottom of the feed tank is inclined, with its lower end facing the furnace opening. A limiting ring is installed on the cover, with a sealing element on its inner wall. The limiting ring engages with the outer wall of the upper part of the feed tank, and the sealing element seals the gap between the limiting ring and the outer wall of the upper part of the feed tank. This utility model solves the problems of molten aluminum oxidizing upon contact with air and forming slag when flowing through the water inlet, and some molten aluminum remaining on the inner wall of the water inlet due to temperature drop, forming hardened aluminum slag, requiring regular slag removal and causing raw material waste.

The invention discloses a preparation process of pure aluminum powder capable of reducing iron, sodium and hydrogen in melt, which comprises the following specific steps: step 1, drying a pure aluminum ingot, charging the pure aluminum ingot into a furnace, and continuously stirring the pure aluminum ingot in an inert atmosphere after the pure aluminum ingot is completely molten; 2, under the inert atmosphere, a dried iron removal agent is added into the melt in the step 1, and stirring continues to be conducted; 3, dried inert gas is introduced into the melt obtained in the step 2 for rotary gas and impurity removal; 4, a dried sodium removal agent is added into the melt treated in the step 3 for sodium removal, and scum on the surface of the melt is removed after standing; and 5, the melt treated in the step 4 is vacuumized, atomized and pulverized, and the high-quality pure aluminum powder is obtained.

The invention relates to the technical field of metal regeneration and cyclic utilization, in particular to a method for preparing Cr-W-C alloy from K213 high-temperature alloy injection residues, and aims to solve the problem that the overall utilization rate of nickel, chromium and tungsten metal in the existing K213 high-temperature alloy injection residues is low. The method comprises the following steps: briquetting alloy slag in a target raw material K213, carrying out smelting and water quenching through an electric arc furnace, carbonylating alloy particles to obtain carbonyl nickel and carbonyl iron, carrying out subsequent decomposition, carrying out hydraulic classification on the obtained carbonylation slag, mixing heavy components with graphite powder, briquetting, and carrying out reduction roasting to obtain the Cr-W-C alloy. Through Cr-W-C alloy preparation, difficult-to-treat materials K213 piled up for a long time in the cast high-temperature alloy industry are regenerated into Cr and W raw materials for vacuum melting of the high-temperature alloy K213, the alloy is high in purity and low in oxygen and nitrogen content, segregation and scum control in the vacuum induction melting process of the high-temperature alloy K213 is facilitated, the quality of a K213 mother alloy product is greatly improved, and meanwhile, the product quality of the high-temperature alloy K213 is greatly improved. Nickel and iron in the K213 alloy slag are effectively recovered and are used for preparing the carbonyl ferronickel powder.

The invention discloses a smelting furnace slagging-off method and a slagging-off system thereof, the slagging-off system continuously executes a scum cleaning task and a bottom slag cleaning task of a plurality of smelting furnaces, and in the slagging-off process of the two tasks, a linkage mechanism drives a slagging-off piece to complete the slagging-off action; the linkage mechanism is provided with a reference point, and in the RGV mode, the distance between the reference point and the furnace mouth is kept unchanged; when scum is cleaned, the scum removing piece can scrape the liquid level of molten metal in the state of being submerged into the liquid level by a fixed depth. When bottom slag is cleaned, the slagging-off piece can be attached to the shape of the furnace bottom to scrape; in the scum cleaning action and the bottom slag cleaning action, when the slag removing piece is about to make contact with the slope face of the furnace mouth, the telescopic action set can stretch out and draw back in the direction parallel to the slope face of the furnace mouth, and the slag lifting action is achieved. The scraping and lifting type slagging-off action is adopted, the slagging-off action can be efficiently and accurately executed, and the requirement for cleaning floating slag and bottom slag is met.