195 results about "Dross" patented technology

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 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 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 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 provides an automatic deslagging iron wire hot-dip galvanizing pot which is characterized in that a zinc pot body is filled with molten zinc, the periphery of an iron wire is immersed in the molten zinc to form a galvanized wire, the galvanized wire is led out from one side of the zinc pot body, an outer blowing ring and a guide plate are mounted in the zinc pot body, and the periphery of the galvanized wire penetrates through the outer blowing ring and then is led out from one side of the zinc pot body; and a guide plate is arranged below the outer blowing ring, and the external compressor can blow compressed gas to the periphery of the galvanized wire through the outer blowing ring. According to the zinc pot, redundant zinc materials on the periphery of a galvanized wire can be blown away and recycled into the zinc pot through compressed air, the compressed air is guided to the position above the position where the galvanized wire is guided out of a galvanizing liquid through the guiding effect of the guiding plate, the liquid level can be blown through the compressed air, and the zinc materials are recycled. The oxide dross is prevented from being attached to the outer surface of the galvanized wire to influence the product quality, the utilization rate of compressed air is improved, the use of electrical components is reduced, and the production and maintenance cost is reduced.

The utility model provides a surface treatment device for a hot galvanized plate, which comprises a zinc dross cleaning machine, the zinc dross cleaning machine comprises a cleaning roller chamber, a cleaning roller is arranged in the cleaning roller chamber, a water cleaning chamber is integrally formed at the bottom of the cleaning roller chamber, a water guide channel is arranged at the bottom of one side of the water cleaning chamber, and the bottom of the water guide channel is connected with a water storage chamber. And a plurality of spray heads are arranged on one side of the water cleaning chamber. Under the work of the water pump, clear water in the water storage chamber is supplied to the spray heads, and the spray heads spray water to fill the clear water in the cleaning roller chamber to flow, so that the water flow flushes residual zinc dross on the outer surface of the cleaning roller, the cleaning effect on the cleaning roller is achieved, and the cleaning effect of the cleaning roller on the zinc dross on the surface of a galvanized sheet is guaranteed; water flow for washing the cleaning roller enters the water storage chamber along the water guide channel to be stored, and water flow circulation for cleaning the cleaning roller is formed under the work of the water pump.

The present application relates to a kind of non-ferrous metal processing waste emulsion low-temperature evaporation treatment method and system, solve how to improve water treatment effect problem.Provide a kind of non-ferrous metal processing waste emulsion low-temperature evaporation treatment method, comprising: S1, pretreatment, the surface oil slick and dross of waste emulsion are collected;S2, low-temperature evaporation, after precision filtration waste emulsion is heated in vacuum environment, make the water in waste emulsion evaporate to separate from waste emulsion, and steam is condensed into water, the concentrated solution after waste emulsion evaporation is collected;S3, subsequent treatment, using activated carbon filter condensate water.Provide a kind of non-ferrous metal processing waste emulsion low-temperature evaporation treatment system, comprising sequentially connected: waste emulsion conditioning tank, oil and dross removal device, precision filtration device, low-temperature evaporation device, activated carbon filter device.Compared with reagent demulsification process, this process does not need to add various demulsifiers and acid and alkali, final effluent conductivity is low, system does not produce sludge, no secondary pollution.

The present application belongs to the technical field of non-ferrous metallurgy, and particularly relates to a method for cooperatively removing copper, arsenic, tellurium and lead in crude bismuth, which comprises the following steps: S1, obtaining molten bismuth liquid by melting, adding an oxidizing agent to the molten bismuth liquid, and performing a pre-oxidation reaction under stirring; S2, adding a composite removing agent and a fluxing agent to perform a reaction, and then removing surface dross; the composite removing agent comprises iron powder, bismuth phosphate and sodium sulfide; S3, adding the crude bismuth after step S2 to a vacuum rectification furnace, vacuum heat-insulating, and outputting refined bismuth. Through the cooperative design of pre-oxidation activation, in-situ sulfidation and phosphate slagging, the present application realizes the simultaneous and efficient removal of impurities such as Cu, As, Te and Pb, and the effective recovery of Ag. Subsequent vacuum distillation further removes residual lead in depth, and ensures that the refined bismuth product reaches a high standard.

The application provides a vacuum induction melting device for improving the purity of high-temperature alloy base alloy, which comprises an induction coil, a crucible body arranged in the induction coil, a crucible nozzle arranged on one side of the top end of the crucible body, a slag baffle arranged at the joint of the crucible nozzle and the crucible body, and a filtering slag baffle arranged on the top end of the crucible body, wherein a lifting ring structure is arranged on the side of the filtering slag baffle away from the crucible body. The vacuum induction melting device can better remove the floating dross on the surface of the alloy liquid and the inclusions in the alloy liquid before the alloy liquid flows out of the crucible. The filtering slag baffle can be used for multiple cycles by replacing the filter screen and used for on-line melting. The slag baffle arranged between the crucible nozzle and the crucible pouring nozzle can remove the floating dross on the surface of the alloy liquid twice, thereby improving the purity of the alloy. The method can be used to realize the application proportion of the high-temperature alloy return material and reduce the floating dross brought into the alloy by the return material.

The invention discloses a waste aluminum purifying and refining device, and relates to the technical field of waste aluminum purifying and refining, the waste aluminum purifying and refining device comprises a base, a smelting furnace is placed on one side of the base, the top of the base is slidably connected with a guide frame, and according to the waste aluminum purifying and refining device, the stirring function and the slag salvaging function are integrated through a slag salvaging stirring mechanism; the mechanism is a stirrer during smelting and can be converted into a slag salvaging device during slag salvaging, and during slag salvaging, the slag salvaging stirring mechanism is always located below the liquid level, dross on the liquid surface is located above a disc base, and then the telescopic end of a second hydraulic rod pushes a fixing frame to move upwards; and the fixed frame drives the movable frame and the cylinder wall as well as the rotating shaft and the slag salvaging and stirring mechanism to synchronously move upwards, so that the scum is intercepted above the disc base, and liquid falls into the smelting furnace through the filter holes.

The invention discloses a method and a device for reducing iron content in a process for producing alumina clinker from aluminum ash, and relates to the technical field of aluminum ash resource utilization, and the method comprises the following steps: mixing a sieved aluminum ash sample with coke powder to prepare a mixture; controlling a gas inlet assembly in the vertical kiln to introduce high-temperature gas into the hearth, so that a preheating section is formed at the upper part in the hearth, and a high-temperature reduction section is formed at the lower part in the hearth; the mixture is added into a hearth through a feeding port in the top of a furnace body, moves downwards under the action of gravity, is gradually heated to 500-800 DEG C in a preheating section, then enters a high-temperature reduction section at the temperature of 1150-1350 DEG C for high-temperature reduction, then is cooled and is discharged from a discharging port, and modified clinker is obtained; and crushing the cooled clinker, carrying out magnetic separation by using a magnetic separator, and separating the magnetic substance from the non-magnetic substance alumina clinker. According to the method, the removal rate of iron in the aluminum ash can reach 85.23-93.61%, and the quality of the aluminum oxide clinker prepared from the aluminum ash is guaranteed.

The utility model discloses a zinc dross ash frying device which is characterized in that an ash frying pan is arranged on a rack, the bottom of the ash frying pan is communicated with a blanking pipe, and a sealing assembly is telescopically arranged on the rack and can seal the blanking pipe; the air cylinder is arranged on the rack, the pushing mechanism has elasticity, one end of the pushing mechanism is connected with the air cylinder, the other end of the pushing mechanism is connected with the sealing assembly, and extension of the air cylinder can give the sealing assembly the movement trend of opening the discharging pipe through the elasticity. The side baffle is a lifting plate and can limit the pushing mechanism to drive the sealing assembly to slide; the ash discharge chute mechanism is arranged on the rack in a liftable manner and has elasticity, and the lifting of the ash discharge chute mechanism can push the side baffle to be shortened and surround the blanking pipe; the limiting mechanism is rotatably arranged on the rack and can limit lifting of the ash discharging sliding groove mechanism, and movement of the pushing mechanism can enable the limiting mechanism to be far away from the ash discharging sliding groove mechanism. The zinc dross ash frying device can provide enough time for an operator to be away from the zinc dross ash frying device after a command for opening the discharging opening is started.

The invention relates to the technical field of copper and copper alloy fusion casting, in particular to elastic copper alloy fusion casting equipment and a fusion casting method.The elastic copper alloy fusion casting equipment is provided with a motor, a first gear, a transmission rod, a first row hook, a scum box, a heat preservation box, a screw rod and a second row hook, the motor rotates to drive the first gear to rotate, and the first gear rotates to drive the transmission rod and the screw rod to rotate; the transmission rod and the screw rod drive the first row hook and the second row hook to rotate, the first row hook fires scum, then the scum falls on the second row hook, then the scum slides into the screw rod through the second row hook, and finally the scum slides into the scum box along the inner wall of the screw rod, and therefore the scum is cleaned. And the melting efficiency of casting equipment is improved.

This invention relates to the field of automatic slag removal technology, specifically disclosing an automatic slag removal device and control method for a molten iron smelting furnace based on visual detection, including the following steps: Step S1: Set up visual detection points and multiple slag removal tools above the molten iron smelting furnace, collect images of the molten iron surface in real time, and divide the floating slag into several regions; Step S2: For any floating slag region, first obtain its thickness distribution to determine the maximum thickness, extract the region's center line, and select any slag removal tool to complete the first slag removal along the center line with the maximum thickness as the depth, generating an initial path and splitting the original region into two sub-regions; Step S3: Each slag removal tool processes the sub-regions: by obtaining the thickness change on both sides of the initial path, calculate the floating slag displacement width in real time to determine the slag removal path for the sub-region; then iteratively update the path based on the new thickness change on the side of the path, gradually refining the slag removal action, and finally completing the cleaning of all floating slag regions.

The utility model relates to the technical field of intermediate tanks, and discloses a built-in high-quality steel fire-resistant intermediate tank, which solves the problem of poor use effect of the existing intermediate tank, and comprises an intermediate tank body, a slag stopping weir is fixedly arranged in the intermediate tank body, and a plurality of first flow guide sleeves, a plurality of second flow guide sleeves and a plurality of third flow guide sleeves are arranged on the slag stopping weir. A material receiving cavity and a flow dividing and discharging cavity are formed between the slag blocking weir and the intermediate tank body, a detachable material blocking plate is arranged on the side, close to the material receiving cavity, of the slag blocking weir in a penetrating mode, a scum collecting cavity is formed in the side edge of one end in the intermediate tank body, and a scum flow guiding groove is formed between the scum collecting cavity and the material receiving cavity. An impact-resistant seating brick is arranged at the bottom end of the interior of the flow-dividing discharging cavity in a penetrating mode, a sprue gate is formed in the center of the impact-resistant seating brick, and a first vortex-preventing blocking plate and a second vortex-preventing blocking plate are arranged at the bottom end of the interior of the flow-dividing discharging cavity; through the intermediate tank, scum can be conveniently discharged, vortex can be avoided, and the casting quality is improved.

This utility model discloses an automatic zinc dross removal device for a galvanizing production line, including a galvanizing tank. A support frame is fixedly connected to the top of the galvanizing tank, and the centerline of the galvanizing tank and the centerline of the support frame are on the same vertical plane. The support frame is equipped with a lifting structure for automatically controlling the raising and lowering of the removal structure. This automatic zinc dross removal device for a galvanizing production line uses an installation cylinder. Before removal, a cylinder inside the installation cylinder is activated. The cylinder pushes a removal trough at the bottom down through a connecting plate, sending the trough into the galvanizing tank for removal of zinc dross. After removal, the cylinder is activated again, driving the removal trough up through the connecting plate for easy material removal and subsequent galvanizing. A limiting cylinder at the top of the connecting plate fits against the outside of the installation cylinder, limiting the connection plate and the removal trough to ensure stability during the raising and lowering process. This solves the problem of not being able to automatically control the raising and lowering of the removal structure.

The utility model discloses a swirl type feeding opening of easy -open can recycled aluminium melts, including the melting side well furnace body, be provided with power room and swirl chamber on the melting side well furnace body, and power room with swirl chamber intercommunication, swirl stirring mechanism sets up in the position of power room's corresponding melting side well furnace body on, is used for stirring the molten aluminium liquid in power room, and promotes swirl chamber to form swirl vortex, the utility model discloses be provided with power room, swirl chamber, eddy current spiral plate and swirl stirring mechanism, through swirl vortex directly with the paint removal waste easy -open can of old age is rolled into the molten aluminium liquid bottom, realizes the quick melting of smokeless, and stirs the molten aluminium liquid in whole melting system, improves the metal homogeneity and temperature homogeneity of molten aluminium liquid, reduces aluminium liquid dross production, and the aluminum metal burning loss rate is low, promotes the melting effect of easy -open can recycled aluminium.

The application discloses an aluminum ash roasting agent and a method for recycling aluminum from aluminum ash, and provides the aluminum ash roasting agent, which comprises the following components in percentage by mass: sodium nitrate 25-35%, charcoal powder 25-35%, camphor powder 15-25% and zinc chloride 15-25%. The application has simple formula components, is convenient to prepare, does not contain sulfur element, greatly reduces the emission amount of the sulfur element, avoids the problem of sulfur element emission exceeding the standard, and simultaneously, by adding the camphor powder into the aluminum ash roasting agent, the camphor powder is filled in the aluminum ash and provides a large amount of oxygen by thermal decomposition, so that the aluminum ash becomes an oxygen environment, changes the phenomenon that only the uppermost aluminum element can contact with oxygen in the traditional stirring kettle, the camphor powder is uniformly mixed with the internal aluminum ash, fully contacts with the internal aluminum ash, releases a large amount of oxygen to promote the oxidation reaction of aluminum, so that the aluminum ash is fully heated, and the heating speed is greatly increased.

The utility model relates to the technical field of vacuum melting high-temperature alloy, and discloses a molten steel scum removing device in vacuum melting, which comprises a vacuum melting furnace, a lifting mechanism, a skimming ladle and a crucible are sequentially arranged in the vacuum melting furnace from top to bottom, the lifting mechanism is positioned at the top of the vacuum melting furnace, and the skimming ladle is positioned at the bottom of the vacuum melting furnace. The lifting mechanism is movably connected with the skimming ladle, a rotating mechanism is further arranged between the lifting mechanism and the skimming ladle, the lifting mechanism, the rotating mechanism, the skimming ladle and the crucible are located on the same axis, and the skimming ladle has a preset inclination angle relative to the surface of molten steel in the crucible. A plurality of through holes are formed in the skimming ladle. According to the utility model, metal oxides, nitrides, sulfides and other inclusions suspended on the surface of molten steel can be effectively removed, the purity of castings and materials is improved, and the production cost is reduced; and the high purity of the high-temperature alloy steel liquid is improved, and a high-quality high-temperature alloy material is obtained.

The application provides a recycled aluminum ash hollow sphere / aluminum matrix composite foam material and a preparation method thereof, and belongs to the technical field of aluminum industrial solid waste resource recycling and metal material processing. The aluminum matrix is used instead of the resin matrix to prepare the composite foam material, and the aluminum ash is used as the hollow sphere raw material, so that the strength and specific energy absorption of the composite foam material can be significantly improved; after the metal aluminum is extracted, the hollow aluminum oxide particle content in the aluminum ash is relatively high, compared with the aluminum matrix, the hollow particle has a relatively low density, and after the aluminum ash hollow sphere is combined with the aluminum matrix, a light product can be manufactured; the obtained recycled aluminum ash hollow sphere / aluminum matrix composite foam material has the performance advantages of low density, high specific stiffness, high energy absorption capacity, excellent mechanical and acoustic damping performance and the like, and has a wide application prospect in the fields of aerospace, transportation, national defense and building.

The utility model relates to the technical field of metal casting, in particular to a continuous casting furnace for copper melt, which comprises a furnace body, an inner cavity of the furnace body is divided into a scum cavity, a mixing cavity and a bottom cavity by a top partition plate and a bottom partition plate, a top through hole is arranged on the top partition plate, and a bottom through hole is arranged on the bottom partition plate. A vacuum pump is mounted on the furnace body, a stirring air supply device is mounted at the top of the furnace body, the stirring air supply device comprises a stirring shaft, a top stirring blade is mounted on the stirring shaft, an air injection channel is formed in the top stirring blade, an inner flow channel is formed in the stirring shaft, a feeding pump is mounted at the top of the furnace body, and an air supply pump is mounted at the top of the furnace body; and the bottom cavity is used for discharging copper liquid through a discharging pipe. According to the device, inert gas and a deoxidizing agent can be effectively and uniformly mixed into copper liquid through the stirring gas supply device, more efficient and thorough deoxidization can be realized by matching with a vacuum pump, and the quality of cast products is guaranteed.

The utility model discloses an aluminum smelting, refining and slagging-off integrated device which comprises a base, a slagging-off mechanism is arranged on the upper portion of the base, and a refining mechanism is arranged on one side of the base. The refining mechanism comprises a telescopic arm, and the telescopic arm is provided with a refining pipe and an adjusting device; the telescopic arm can horizontally stretch out and draw back to drive the refining pipe to stretch into the aluminum smelting furnace. The inlet end of the refining pipe is connected with the refining tank through a hose, and the spraying end of the refining pipe is bent; the adjusting device can rotate the refining pipe, and the spraying end of the refining pipe swings to the bottom of the molten aluminum. The telescopic arm is connected with the side wall of the base through a lifting and placing support, and the lifting and placing support can lift and place the telescopic arm up and down in a horizontal posture. According to the device, a refining agent can be uniformly sprayed to the bottom of molten aluminum of an aluminum smelting furnace, dross on the surface of the molten aluminum is removed, and the refining effect is ensured while the refining efficiency is improved.

The utility model relates to the technical field of galvanizing, in particular to a hanging tool for hot galvanizing of U-shaped steel, which comprises a hanging basket and a collecting assembly, the hanging basket is provided with a containing groove which is used for containing U-shaped steel, and the hanging basket is provided with a lifting lug which is used for being connected with a lifting hook; the collecting assembly comprises two guiding pieces and a collecting piece, the two guiding pieces are fixedly arranged on the two sides of the hanging basket in the width direction of the hanging basket, the collecting piece is arranged between the two guiding pieces, the collecting piece is in sliding connection with the guiding pieces, the collecting piece slides in the length direction of the hanging basket, and a distance is formed between the collecting piece and a groove opening of the containing groove. The collecting piece is used for skimming scum on the upper layer of the zinc liquid. According to the device, before the U-shaped steel is exposed out of the molten zinc, the collecting piece can slide along the obliquely-arranged guiding piece, and dross on the surface layer of the surface of the molten zinc is skimmed to one side; and therefore, the workload of workers is reduced, and the working efficiency of hot galvanizing of the U-shaped steel is improved.

This invention relates to a green resource utilization process for contaminated sludge, comprising: river dredging sludge, lake and reservoir dredging sludge, culvert dredging sludge, and various types of sludge. After passing through a screen, the contaminated sludge is transported to a heavy metal release treatment facility. Following release treatment, it is transported to a Fenton process to treat organic pollutants, then to an activated particle filter to remove heavy metals. The remaining sludge is flocculated, and the flotation scum and sediment are collected and transported to a CO2 carbonization process. Finally, it is transported to a mechanical dewatering process. The resulting solids are used as improved soil for resource utilization, and the dewatered filtrate is used as reclaimed water through ion exchange.

This invention relates to the field of zinc dross recovery technology, specifically to a hot-dip galvanized dross recovery device, comprising an outer separation chamber, an inner melting chamber, a rotary filter press mechanism, a top filter mechanism, and a feeding channel. The outer separation chamber is mounted on a mounting frame, the inner melting chamber is located inside the outer separation chamber, the rotary filter press mechanism is rotatably mounted inside the inner melting chamber, the top filter mechanism is located at the top of the inner melting chamber, and the feeding channel is connected to the side wall of the inner melting chamber. In the inner melting chamber, the molten zinc and dross are subjected to shearing force generated by the rotor, thereby breaking down and refining the three-dimensional network skeleton formed by intermetallic compounds, preventing them from encapsulating large amounts of molten zinc. Furthermore, the dross is conveyed upwards by the spiral blades on the rotor, and during this conveying process, a filter press effect is generated on the dross, thereby discharging the entrained zinc and further improving the zinc recovery rate. This solves the problem that intermetallic compounds generated during the smelting process encapsulate large amounts of molten zinc and are skimmed off with the dross, leading to a significant decrease in the zinc recovery rate.

DEPCT65 What has been provided is a hot-dip galvanizing method that can inhibit the occurrence of... The dross defect and the facilitation of alloying are advantages when producing quenched steel plates. Hot-dip galvanizing is a process of zinc coating through alloying; it is a standard operating procedure for hot-dip galvanizing. This is an example of the hot-dip galvanizing process that has been used for manufacturing. Hot-dip galvanized steel sheet or hot-dip galvanized steel sheet through The alloying process in this hot-dip galvanizing operation includes the aggregation step. Example (S1) procedure for determining the amount of dross phase sine (S2) and adjustment procedure. Working condition (S3) in the sample collection step (S1), samples were collected from the bath. Hot-dip galvanizing with Al in the determination process to obtain dross sine (S2) content. The dross phase saturation in the collected samples was determined during the conditioning procedure. Working (S3) The working conditions of the hot-dip galvanizing operation are adjusted by Based on a defined dross phase quantity. -----------------------------------------------------------

This application discloses a method for controlling submerged roller marks on galvanized automotive exterior panels, comprising: acquiring a preset temperature range for entering the zinc pot, the thickness and width of the cold-rolled strip, and the real-time furnace speed; and controlling the temperature of the cold-rolled strip entering the zinc pot within the preset temperature range based on the thickness, width, and real-time furnace speed of the cold-rolled strip. This application controls the temperature of the strip entering the zinc pot and the power of the zinc pot sensor to ensure that the heat received by the zinc pot from the strip during normal strip pulling is at a stable level, preventing fluctuations in the zinc liquid temperature, reducing the amount of zinc dross produced, avoiding the formation of black spots, reducing the number of black spots, or shrinking the shape of black spots, thereby controlling the submerged roller marks.