This paper introduces the common classification of the melting&holding furnace, and some auxiliary facilities closely matched with the melting&holding furnace. By introducing some new combustion technology in the melting&holding furnace, the development direction of the melting&holding furnace is introduced. This paper describes the related technology of the furnace systematically, and points out that the furnace development direction of the furnace is reducing burning loss, saving energy, safety and environmental protection and intelligence.

In this paper, the liquid-solid cast-rolling 1070A/2024 aluminum alloy composite sheet with casting and rolling speeds of 14 m/min, 12 m/min, 10 m/min and 8 m/min are prepared by vertical double-roll casting and rolling mechanism. By means of scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD), hardness tester and shear test, the effect of casting and rolling speed on the interface microstructure and properties of liquid solid casting and rolling 1070A/2024 aluminum alloy composite sheet is investigated. The results show that with the decrease of the casting and rolling speed, the intermetallic compounds at the composite interface first increase and then decrease, and the interfacial hardness at the composite interface increases and then decreases, reaching the highest value of 129.5HV0.1 when the casting and rolling speed is 10 m/min. The shear strength changes in a wavy way and reaches a maximum value of 80.7 MPa when the roll speed is 12 m/min.

Abstract: Starting from the actual needs of digital transformation of nonferrous metal processing enterprises, this paper discusses the overall framework of nonferrous metal processing digital factory with industrial internet platform as a unified base. From the four aspects of equipment automation, production digitization, operation digitization, data security protection to carry our research, put forward the construction of nonferrous metal processing digital factory ideas, enabling nonferrous metal processing enterprises to improve production efficiency, optimize product quality, enhance equipment operation guarantee, reduce production energy consumption, strengthen safety production, improve competitiveness.

In order to solve the problem of environmental pollution caused by a large amount of flue gas in cold rolling process, the physical models of annular suction hood and slit hood for oil mist trapping in aluminum rolling process are established. The numerical calculation model of the flow field of two kinds of exhaust hoods is established by means of computational fluid dynamics method, and the characteristic wind speed near the mouth of the two kinds of exhaust hoods and the trapping effect of pollutants are compared. The results show that the trap performance of annular suction hood is better than that of slit hood.

This paper expounds the harm and potential value of aluminum ash, introduces the comprehensive utilization technology of aluminum ash resources, and analyzes the application prospect and existing problems of aluminum ash.

Abstract: Based on the perspective of market supply dependence on demand, using existing and future capacity data, this paper analyzes the layout of lithium battery manufacturers plants and aluminum foil production enterprises in various provinces and cities across the country. The results show that the gap of battery aluminum foil in China is 543.6kt, Sichuan, Ningxia and other provinces completely rely on imports, and Guangdong, Chongqing and other provinces oversupply. For the new battery aluminum foil project, the best regional layout is given, and the development suggestions are provided to the existing enterprises.

This paper reviews the development history of Chinese aluminum industry, classifies and summarizes the waste aluminum alloy, analyzes the social quantity of domestic waste aluminum alloy resources from multiple angles, and predicts the increment of waste aluminum alloy (recycled aluminum) resources in the next ten years (2026-2035). The problems existing in the development of domestic waste aluminum alloy recycling industry and how to achieve benign development in the future are put forward.

In this paper, the research results of additive manufacturing titanium alloy in recent years are reviewed, and the research process at home and abroad is summarized from two aspects: the study of microstructure and properties, the influence of different methods on microstructure and properties, and the next research is prospected.

This paper introduces the system composition and electrical control composition of the aluminum strip alkali cleaning unit, analyzes the electric drive control principle of the alkali cleaning unit in detail, and provides a reference for the subsequent design of the alkali cleaning unit.

In this paper, the double demulsification process is used to realize high-efficiency separation of emulsion water and milk, and Fenton oxidation treatment is carried out on the wastewater generated by separation. Hydroxyl radical is generated by the chain reaction between bivalent iron ion and hydrogen peroxide, and organic matter in the wastewater is degraded with super oxidation capacity. By controlling the addition of 1.5% hydrogen peroxide and 4% ferrous sulfate in wastewater, the degradation rate of organic matter can be effectively improved, and the COD of wastewater water quality can be significantly reduced to less than 300mg/L, meeting the water intake target of the park sewage treatment plant. Increasing the reaction temperature can increase the reaction rate, but has little effect on reducing COD in wastewater. The process has the characteristics of simplicity, high efficiency and high conversion rate, and can be used as a technical reserve in hazardous waste treatment industry.

Taking 6005A-T6 aluminum alloy as the research object, the laser welding technology of lap joint is studied in this paper. The research contents include increasing the laser power with constant wire feed speed, laser power unchanged and improve wire feed speed. The results show that the surface of the 2 mm 6005A-T6 aluminum alloy lap joint is well formed after laser welding, but the welding blots appear on the back when the laser power reaches 5 000w. When the wire feeding speed is unchanged and the laser power is increased, the weld metal is easier to spread, the fusion performance is increased, and the weld surface texture becomes deep and clear. At the same time, with the increase of laser power, mechanical properties and mechanical properties increase. When the laser power is unchanged and the wire feeding speed is increased, the surface forming quality decreases, the joint penetration depth and mechanical properties increase first and then decrease. The mechanical properties of the fracture specimens at the fusion line of the upper plate are higher than those at the fusion line of the lower plate. The results of microstructure testing show that the laser welding seam of the lap joint has obvious columnar crystal structure near the fusion line, and the center of the weld is equiaxed grain.

This paper puts forward personal opinions on the development process, equipment configuration, main functions, production application results and scheme comparison of 2800 mm six-roll aluminum strip cold rolling mill, which provides reference for the equipment selection and the subsequent improvement of domestic equipment.

Aiming at the problems such as low transportation efficiency, difficult material tracking, chaotic production scheduling and unstable operation of logistics equipment, the paper puts forward optimization and improvement measures, which can provide reference for the design and application of related equipment in the same industry.

The paper analyzes the digital delivery of engineering design of nonferrous metal processing industry from the aspects of construction background, development status, construction ideas, project application cases and existing difficult problems, and puts forward solutions.

In this paper, titanium aluminum composite plate made by warm rolling process is selected, and then annealed at different times. Optical microscope, scanning electron microscope and tensile property test are used to study the influence of annealing time on the tensile property of titanium aluminum composite plate. The results show that the grain boundary of the conded layer of the processed titanium-aluminum composite plate is relatively straight and complete, and no obvious diffusion phenomenon is observed. The pure titanium layer presents a mixed structure of equiaxed crsytal and twin crystal, while the pure aluminum layer has a completely broken grain and elongated ribbon structure. Compared with the processed state, it is found that the plasticity of the composite plate is significantly improved after annealing, but the strength is somewhat reduced. The tensile fracture of the composite plate is mainly composed of dimple, which has obvious ductile fracture characteristics. According to the analysis, this is caused by the removal of residual stress caused by annealing during the plastic processing of the composite plate.

This paper introduces the application of oxygen-fuel combustion technology in aluminum smelting furnace. The innovation application of this technology in the aluminum smelting industry, as well as the design and improvement of equipment and process parameters, and the control of tons of natural gas consumption, combustion efficiency, burning loss of liquid aluminum, flue gas emissions, etc., can improve the above indicators.Therefore, it is proved that the oxygen-fuel combustion technology can be applied to the aluminum industry and achieve the effect of improving the combustion efficiency and optimizing the cost of aluminum melting furnace.

Based on a 2 350 mm aluminum strip continuous annealing unit, the main process parameters, equipment composition and key equipment points of the aluminum strip continuous annealing unit are discussed in order to achieve a reasonable scheme configuration.

In this paper, the microstructure of C19210 (Cu-0.1Fe-0.03P) alloy annealed at different temperatures is observed, and its tensile strength, microhardness and electrical conductivity are measured. The result show that the recovery and recrystallization of rolled C19210 alloy occur in sequence at 200~500 ℃. The tensile strength of C19210 alloy decreases when the annealing temperature increases, but the tensile strength increases slightly to 416MPa at 450℃ under the combined effects of work hardening weakening, dispersion strengthening and grain size evolution. The elongation and conductivity of C19210 alloy increase with the increase of annealing temperature, and the microhardness decreases. However, due to the second phase precipitation, the hardness increases to 128HV at 400℃ and then decreases rapidly.

In the process of secondary aluminum ash wet extraction and recovery of aluminum resources, the active aluminum compound reacts with water to produce hydrogen, methane, ammonia and other combustible mixed gases. The ammonia in the mixed gas is absorbed by frozen water to reduce the corrosion effect of the ammonia in the combustible gas on the burner. Part of the liquid is extracted from the ammonia gas absorber kettle, and then recycled back to the absorber to absorb the mixed gas after cooling. The influence of different circulation amount on the deammonification effect of the mixed gas is analyzed. The results show that when the mass fraction of ammonia in raw gas is 53.09% and the flow rate of circulation liquid is 6kg/m3 of raw gas, the mass concentration of ammonia in combustible gas can be reduced to 4.38 mg/L, which meets the requirements of the inlet gas of burilers. The mass fraction of recovered ammonia water is 20.46%, which meets the HG/T 5353-2018 industrial ammonia water standard. The use of chilled water to recover ammonia from the combustible gas in the wet extraction process of secondary aluminum ash can reduce the harm of harmful components in the combustible gas to the burner, and recover the ammonia gas to produce industrial ammonia water, which can produce certain economic benefits.

In this paper, the effects of heat treatment on the superelasticity and specific energy absorption of TiNi51/Ta composite filament are studied by differential scanning calorimetry and tensile testing. The results show that the superelastic upper and lower platform stress difference of TiNi51/Ta SMA composite wire is obviously greater than that of TiNi51 alloy wire is obviously better. With the increase of heat treatment temperature, the superelastic stress on the upper and lower platform of composite wire gradually decreased, and the lower platform stress decreased more significantly. The specific energy absorption of the composite wire increased, and the specific energy absorption of the composite wire during online heat treatment at 500 ℃/12 s is 3.18 J/g. The superelasticity and specific energy absorption of the composite wire are the same as that of online heat treatment when the temperature remained constant for 15 min, but the heat treatment time is prolonged and the specific energy absorption is slightly reduced. The specific energy absorption of 500 ℃/15 min heat treatment is 3.04 J/g.