12results about How to "Fast melting" patented technology

This invention discloses a high-speed electroslag remelting apparatus and remelting method, belonging to the field of electroslag metallurgical technology. The electroslag remelting apparatus of this invention includes a magnetic field generating and moving device, a metal consumable electrode and its blowing system, an ultrasonic generator, and a crystallizer. During the remelting process, argon gas is introduced through pores in the core of the metal consumable electrode. Ultrasonic treatment affects the vibration of the metal consumable electrode. Under the combined effect of these two factors, the formation and dripping of droplets at the end of the consumable electrode can be accelerated. Simultaneously, by setting up the magnetic field generating device, the electromagnetic force generated by the magnetic field and the remelting current ensures that the droplets drip evenly onto the molten metal pool, rather than the core. The remelting method adopted by the remelting apparatus of this invention accelerates the remelting speed without reducing the solidification quality of the remelted ingot, which is beneficial for improving production efficiency and reducing energy consumption per ton of steel.

The invention discloses a preparation method of an Al-RE intermediate alloy based on an alloy opposite doping method, which comprises the following steps: firstly, industrial pure aluminum Al and mother alloy Al-90RE are taken as raw materials, the raw materials are dried according to a mass ratio meeting the requirement of Al-(10-50) RE, then, the raw materials are melted by adopting a two-stage variable-temperature melting method to obtain an Al-RE melt, then, the Al-(10-50) RE melt is refined, and meanwhile, the Al-RE intermediate alloy is prepared by adopting an alloy opposite doping method. The steel ingot mold is preheated, and finally, the refined Al-RE melt is poured into the preheated steel ingot mold to be cooled, so that an Al-RE intermediate alloy ingot based on the alloy opposite doping method is obtained; rE is one of La, Ce or La + Ce alloy. The obtained Al-RE intermediate alloy is compact in metallographic structure and less in inclusion; in addition, the yield is greater than 90.0%.

The utility model belongs to the technical field of casting powder liquefaction pouring in a continuous casting steelmaking link, and relates to an on-line treatment device for directly heating and melting continuous casting powder, which comprises a high-temperature melting chamber, a plasma spray gun, a casting powder bin, a replaceable flame blocking base plate and a fan. The high-temperature melting chamber is a hollow cavity, and a gradually-expanding pouring outlet is formed in the bottom of the high-temperature melting chamber. And the plasma spray gun is horizontally mounted on one side wall. The casting powder bin is arranged at the top, and a flow adjusting valve is arranged at the bottom. The replaceable flame blocking base plate is vertically inserted through the top wide seam, the plate face is perpendicular to the jet flow direction, and the lower portion is a U-shaped flow guide face. The fan is connected to the upper right portion of the pouring outlet so as to maintain micro-negative pressure. The plasma jet flow is adopted to directly impact and heat solid slag powder, U-shaped baffle flow guide, micro-negative pressure drainage and divergent outlet flow stabilization are matched, rapid and uniform melting and accurate and stable pouring of casting powder are achieved, equipment is compact, control is sensitive, and the device is particularly suitable for high-quality steel continuous casting production.

A composite wax melting and stirring system comprises a wax melting device and a stirring tank, the wax melting device comprises a heat conduction stirring shaft (1), a crushing shell (2) and a wax melting shell (3), a wax raw material inlet (4) is formed in the top of the crushing shell (2), a molten wax outlet (5) is formed in the bottom of the discharging end of the wax melting shell (3), and a discharging port in one end of the crushing shell (2) is in flange sealing connection with a feeding port in one end of the wax melting shell (3); the device has the advantages that internal and external heating is performed simultaneously, the wax raw material melting speed is high, the wax raw material is crushed during feeding, and large wax raw materials are prevented from being completely melted. The mixing speed of the wax liquid and the additive is high, the additive is integrated in one burdening pipeline for feeding, and the integrity of the feeding pipeline is good.

A wax melting device comprises a heat conduction stirring shaft (1), a crushing shell (2) and a wax melting shell (3), a wax raw material inlet (4) is formed in the top of the crushing shell (2), a molten wax outlet (5) is formed in the bottom of the discharging end of the wax melting shell (3), a discharging port in one end of the crushing shell (2) is in flange sealing connection with a feeding port in one end of the wax melting shell (3), and the heat conduction stirring shaft (1) is installed in the crushing shell (2) and the wax melting shell (3); the device has the advantages that internal and external heating is performed simultaneously, the wax raw material melting speed is high, the wax raw material is crushed during feeding, and large wax raw materials are prevented from being completely melted.

The invention provides a biomass oxygen lance and an electric arc furnace, relates to the technical field of metallurgical equipment, and aims at solving the problem that a large amount of carbon is discharged due to the fact that oil oxygen and gas burners are used for fluxing waste steel at the present stage to a certain extent. The invention provides a biomass oxygen lance. The biomass oxygen lance comprises a central pipe, a rotational flow blade and a circular seam sleeve assembly, the central pipe, the rotational flow blade and the circular seam sleeve assembly are sequentially and coaxially arranged in a sleeving mode from inside to outside, a containing cavity is formed in the circular seam sleeve assembly, the central pipe is arranged in the containing cavity, and the rotational flow blade surrounds the outer wall of the central pipe, so that a rotational flow gas channel is formed between the central pipe and the circular seam sleeve assembly; a premixing channel is formed in the position, corresponding to the circular seam sleeve assembly, of the outlet end of the center pipe, and the rotational flow gas channel is communicated with the premixing channel.

A composite wax production line comprises a wax melting device, a stirring tank and a storage tank, the wax melting device comprises a heat conduction stirring shaft (1), a crushing shell (2) and a wax melting shell (3), a wax raw material inlet (4) is formed in the top of the crushing shell (2), a molten wax outlet (5) is formed in the bottom of the discharging end of the wax melting shell (3), and a discharging port in one end of the crushing shell (2) is in flange sealing connection with a feeding port in one end of the wax melting shell (3); the device has the advantages that internal and external heating is performed simultaneously, the wax raw material melting speed is high, the wax raw material is crushed during feeding, and large wax raw materials are prevented from being completely melted. The mixing speed of the wax liquid and the additive is high, the additive is integrated in one burdening pipeline for feeding, and the integrity of the feeding pipeline is good.

This invention belongs to the field of iron and steel metallurgical technology, specifically disclosing an automatic control smelting method for a low-silicon, high-manganese molten iron converter. The method includes: adjusting the lance position by adjusting the oxygen lance in stages (high-low-high); adjusting material and temperature parameters by selecting qualified molten iron with a temperature of 1220-1400℃, a silicon content ≤0.20%, a manganese content ≥0.60%, controlling the molten iron ratio at 83%, and controlling the initial molten pool temperature at 1380-1430℃ and the middle and later stages at 1620-1680℃; and controlling the oxygen supply intensity by stabilizing the initial oxygen level below 8% and maintaining the converter oxygen supply intensity stably at 3.2m. 3 / t·h; In the medium term, starting from an oxygen supply of 15%, the oxygen supply intensity will be increased from 3.2m 3 / t·h decreased to 3.08m 3 The oxygen supply intensity is maintained at 3.2 m / t·h until the final carbon extraction stage; later, when the oxygen step reaches 25%, the oxygen supply intensity is increased back to 3.2 m / t·h. 3 / t·h.

The utility model discloses an injection structure of an injection molding machine, and belongs to the technical field of injection molding machines, the injection structure of the injection molding machine comprises a mounting plate, a mounting seat and a fixed seat are respectively mounted above the mounting plate from left to right, a feed hopper is in bolted connection with the upper part of the fixed seat, a hydraulic cylinder is in bolted connection with the upper part of the mounting seat, and the hydraulic cylinder is in bolted connection with the lower part of the mounting plate. A charging barrel is mounted at the output end of the hydraulic cylinder, a power supply box is mounted above the charging barrel, and a heating ring is mounted below the power supply box; a hydraulic cylinder is arranged to drive a charging barrel to move to a position to be injected, at the moment, four sets of heating rings are distributed on the outer side of the charging barrel at equal intervals to heat and melt plastic particles in the charging barrel, then a motor drives a screw rod to rotate, the melted plastic particles are conveyed to an injection nozzle, and finally, the injection nozzle is opened. And the injection nozzle is matched with the injection port to inject molten plastic particles into the mold, so that the melting speed of the plastic particles is effectively increased, and the injection efficiency of the injection machine is improved.

The invention discloses a waste nonferrous metal component extraction and detection device and method, and relates to the technical field of waste nonferrous metal component extraction.The waste nonferrous metal component extraction and detection device comprises a supporting frame, a smelting furnace is rotationally connected to the inner side of the supporting frame, a movable plate is slidably arranged on the inner side of the supporting frame, and a mixing assembly is arranged on the movable plate; the mixing assembly comprises a rotating ring rotationally connected with the inner side of the movable plate, a first movable ring movably connected with the outer side of the rotating ring, a first rotating rod movably connected with the inner side of the rotating ring, a second movable ring movably connected with the outer side of the first rotating rod, a second trapezoidal plate mounted at the upper part of the second movable ring, and a first trapezoidal plate mounted at the bottom of the first movable ring; the mixing assembly rotating rod drives the second stirring fan blades to vibrate, waste non-ferrous metal can be evenly stacked, air gaps among particles are effectively reduced, air is a poor conductor of heat, heat resistance can be remarkably reduced through reduction of the air gaps, and heat of a smelting furnace can be more efficiently transmitted into metal.

The utility model relates to the technical field of secondary aluminium smelting, especially to a waste aluminium scrap's secondary aluminium ingot smelting furnace, which smashes waste aluminium scrap through the cooperation of the smashing and feeding mechanism and the secondary crushing mechanism, thereby accelerating the melting speed of waste aluminium and improving the smelting efficiency; the smelting furnace body is fixedly installed with a mounting plate, the mounting plate is provided with a smashing and feeding mechanism, the smashing and feeding mechanism comprises a conveying box, four supporting plates are fixedly and symmetrically installed on the mounting plate, the four supporting plates are connected through a smashing box, a first feeding hole is formed in the smashing box, the conveying box is welded on the smashing box, a first motor is fixedly installed on the smashing box, a stirring shaft is fixedly installed at the output end of the first motor, a plurality of stirring rods and a plurality of smashing blades are fixedly installed on the stirring shaft, a limiting plate is fixedly installed on the mounting plate, the limiting plate is fixedly connected with the conveying box, a fixed plate is fixedly installed on the mounting plate, and a second motor is fixedly installed on the fixed plate.

This invention discloses a method for preparing whisker masterbatch for polyolefin foam materials and the whisker masterbatch itself. The method includes: adding whiskers, lubricants, dispersants, and coupling agents in a set ratio to an air-blast powder activation machine, and activating them under set conditions until fully activated whisker semi-finished products are obtained; introducing the whisker semi-finished products and polyethylene resin into a twin-screw continuous internal mixing extruder with a grinding surface and hot cutting in a set ratio, mixing and extruding, and cutting into particles by grinding surface hot cutting; subjecting the particles extruded from the twin-screw continuous internal mixing extruder to three-stage air cooling and then to vibrating sieve sorting to finally obtain whisker masterbatch for polyolefin foam materials. This invention solves the problems of easy screen clogging when whisker masterbatch is used as a polyolefin foam material in the prior art, as well as the problems of uneven foaming, rapid softening speed, and insufficient cell stiffness in polyolefin foam materials.