2052 results about "Zinc" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The invention discloses a matte glaze and a preparation method thereof. The matte glaze comprises the following components by weight: 1-5 parts of zinc oxide, 5-15 parts of barium carbonate, 0-15 parts of zirconium silicate, 10-25 parts of potassium feldspar, 10-20 parts of kaolin, 5-15 parts of calcite, 5-15 parts of calcined talcum powder, 20-35 parts of a matte frit and 0.5-1 part of an additive. Specifically, the matte frit comprises the following components by weight: 30-50 parts of SiO2, 15-20 parts of Al2O3, 0.01-0.5 part of Fe2O3, 3-10 parts of CaO, 0.5-5 parts of MgO, 1-5 parts of K2O, 3-10 parts of Na2O, 3-10 parts of ZnO, 0.1-1 part of B2O3 and 10-25 parts of BaO. By introducing the matte frit, the melting temperature of the formula is lowered, the firing range of the formula isbroadened, and the glaze texture achieves a fine matte effect.

The invention discloses piggy creep feed containing composite flavone. The piggy creep feed is prepared from the following raw materials in parts by weight: 13 to 20 parts of expanded corn, 10 to 25 parts of corn, 6 to 13 parts of broken rice, 8 to 12 parts of flour, 8 to 15 parts of whey mist, 3 to 8 parts of soy protein concentrate, 5 to 10 parts of extruded soybean, 0.7 to 3 parts of soya-bean oil, 7 to 12 parts of 46.5-percent bean pulp, 2 to 5 parts of fish meal, 2 to 5 parts of plasma protein powder, 0.3 to 0.7 part of mountain flour, 0.5 to 1.0 part of calcium hydrophosphate, 0.05 to 0.5 part of lysine, 0.05 to 0.3 part of threonine, 0.1 to 0.3 part of sodium chloride, 0.1 to 0.8 part of compound flavone premix compounds, 0.15 to 0.3 part of zinc oxide, 0.03 to 0.06 part of calcium propionate, 0.02 to 0.04 part of ethoxyquin and 1.0 part of suckling pig premix compounds. The invention also discloses a preparation method. The intestinal tract health and the production performance of weaned pigs can be improved.

The invention discloses an intelligent control method of a zinc ash-containing tail gas purification system, which relates to the technical field of tail gas purification systems, and comprises the following steps of: firstly, continuously monitoring a condensation process of high-temperature zinc-containing steam in a cooler through a monitoring device, and collecting zinc steam condensation conditions and particle generation data of tail gas under different temperature and pressure states in real time; according to the invention, intelligent monitoring, signal analysis, machine learning identification and dynamic regulation and control are combined to realize accurate control of the zinc-ash-containing tail gas purification system. Key features are extracted through real-time monitoring and data preprocessing, intelligent recognition of particle concentration is achieved based on feature vectors and machine learning, the rotating speed of the centrifugal separator is adjusted in a self-adaptive mode, and efficient separation and system stability are ensured by linkage with pulse back-blowing dust removal. Compared with a traditional fixed rotating speed mode, the tail gas purification efficiency is improved, the maintenance cost is reduced, the service life of equipment is prolonged, the automatic operation capacity is enhanced, and the system is kept in the optimal working state during load fluctuation.

The invention relates to the technical field of in-situ / ex-situ remediation of sites polluted by heavy metals such as cadmium, lead, copper and zinc, and discloses a heavy metal polluted soil remediation system and method based on intelligent management and control. The system comprises an electrode system module, an activator module, a targeted adsorption device module, an automatic monitoring system module, an intelligent decision-making system module and a photovoltaic power supply module. The method comprises the steps of driving heavy metal ions in soil to directionally migrate through an electric field; the activating agent module works, green micromolecule organic acid and other activating agents are injected in a gradient mode, and the migration efficiency of heavy metal is improved; activated heavy metal ions can be captured by an adsorption material in the targeted adsorption device module in cooperation with a selective enrichment device; meanwhile, the automatic monitoring system module collects environmental parameters in real time; the intelligent decision-making system module optimizes the remediation efficiency and energy consumption according to the real-time data, and low-cost and high-efficiency remediation of soil heavy metal pollution is achieved. The remediation efficiency is remarkably improved, and the risk of secondary pollution is reduced.

The invention provides an intelligent control method and system for the zinc layer thickness of continuous hot galvanizing, and relates to the technical field of data processing, and the method comprises the steps: collecting the historical production data of a production line, and constructing a zinc layer thickness and air knife pressure prediction model; the two models are trained according to historical data, and a setting table of the distance and height of the air knife is obtained through statistical analysis; acquiring real-time production data, determining air knife parameters according to the setting table, and inputting the air knife parameters into the trained air knife pressure prediction model to obtain an air knife pressure set value; and inputting the real-time data and the air knife set value into the zinc layer thickness prediction model to obtain a first zinc layer thickness prediction value. If the predicted value meets a preset standard, current air knife parameters are stored, otherwise, a feedback adjustment mechanism is used for adjusting air knife pressure, and a second zinc layer thickness predicted value is calculated; if the adjusted predicted value meets the requirement, air knife parameters are stored; if the requirement is not met, the adjusting step is repeated; and intelligent control is carried out through the stored air knife parameters.

The invention provides a multi-source geophysical prospecting data fused Zenzenite rock mass contact zone anomaly method and system, and relates to the technical field of geophysical prospecting, the method comprises the following steps: executing joint denoising processing and time-frequency feature enhancement processing on a TFEM data set in a three-dimensional fused data volume, and outputting the optimized three-dimensional fused data volume; and based on the optimized three-dimensional fusion data body, by establishing a mapping relationship between magnetic, electric and polarization anomalies and a geologic body, quantifying the correlation between a multi-parameter combination and a mineralization index and screening an up-to-standard abnormal region, and finally delineating a magnetic anomaly gradient zone, a low-resistance region and a high-polarization anomaly co-occurrence ore prospecting target region three-dimensional distribution diagram. Through multi-source geophysical prospecting method collaboration, data deep fusion, quality optimization and accurate mapping, full-chain technology upgrading from data acquisition to target area delineation is realized, and the high efficiency of mineral exploration is improved.

The invention relates to the technical field of magnesium alloys, in particular to a high-toughness rare earth-containing magnesium alloy and a preparation method thereof.The high-toughness rare earth-containing magnesium alloy is prepared from, by weight, 3-8 parts of Zn, 1-5 parts of RE, 0.5-3 parts of Al, 0.1-1 part of Mn, 0.05-0.3 part of Zr and the balance Mg; rE is a combination of Y, Nd and La in a mass ratio of (2-3): 1: (0.5-1). Zinc is used as a secondary main element to replace part of aluminum, efficient solid solution strengthening is achieved through high solid solubility of zinc in magnesium, meanwhile, the morphology and distribution of a precipitated phase are regulated through rare earth, a beta-MgZn2 phase is formed, the high-temperature stability is better, balance optimization of strength, toughness and corrosion resistance is achieved, meanwhile, the welding performance of the alloy is improved through combination of Y, Nd, La and Zr, and the welding performance of the alloy is improved. The hot crack tendency is reduced, the brittle phase problem of a traditional high aluminum alloy is avoided, and the corrosion resistance and the machining performance are synergistically improved.

The invention provides a production process for stably controlling adhesive force of a DP steel zinc layer. The production process comprises the following steps: step 1, setting a heating section 1, a heating section 2 and a furnace nose section in a total radiation heating annealing furnace; 2, according to the model and thickness of DP steel, target dew points of a first heating section, a second heating section and a furnace nose section are set; 3, according to the target dew points set in the first heating section, the second heating section and the furnace nose section in the step 2, water vapor is put into the protective gas for humidification, and the water vapor reacts with Si, Mn and Cr elements enriched on the surface of the steel plate to generate volatile oxides; the dew point of the annealing furnace is precisely controlled in a segmented mode, different humidification modes are adopted, and the surface state is controlled, so that surface oxide residues are reduced, cleanliness of a steel substrate is guaranteed, and the binding force of a zinc layer is improved; the iron oxide layer formed on the surface of the steel plate enters a reducing atmosphere annealing furnace containing hydrogen, the hydrogen can reduce the iron oxide layer on the surface of the steel plate to form a reduced iron layer, and the adhesive force of a zinc layer is improved.

The invention relates to the technical field of copper alloys, in particular to a high-conductivity wear-resistant copper alloy and a preparation method and application thereof. A high-conductivity wear-resistant copper alloy comprises, by mass, 3-6% of nickel, 2-5% of tin, 1-3% of zinc, 0.1-0.5% of a rare earth element, 0.8-1.2% of a carbon nanotube-copper intermediate alloy and the balance copper, the rare earth element is one of cerium and lanthanum, the conductivity of the high-conductivity wear-resistant copper alloy is larger than or equal to 94% IACS, and the Vickers hardness of the high-conductivity wear-resistant copper alloy is larger than or equal to 120 HV. By regulating and controlling the mass ratio of nickel (Ni) to tin (Sn), adding the rare earth element and the carbon nanotube-copper intermediate alloy and accurately controlling the preparation process, the conductivity, wear resistance and mechanical property of the copper alloy material are remarkably improved, and the copper alloy material has wide application prospects in the fields of power transmission, high-speed transportation, ocean engineering and the like.

The invention discloses a method for recovering nearly all elements in low-precious-metal zinc replacement powder, which belongs to the technical field of non-ferrous metal wet smelting, and comprises the following steps: preparing zinc replacement powder, oxidizing and leaching, extracting copper, preparing cuprous chloride, electrodepositing zinc in raffinate, extracting precious metal by using a gold extracting agent, extracting, reducing and smelting to prepare a gold ingot and a silver ingot, and dissolving by using sodium hydroxide. Preparing lead carbonate; carrying out oxidation acid leaching; replacing; and smelting bismuth. According to the technology for achieving recovery and high-value utilization of nearly all elements in the zinc replacement powder under the mild condition, the technology can be carried out at the normal temperature, the high-pressure condition does not need to be provided, the zinc replacement powder is leached through the acid solution, then various valuable metals are selectively extracted from the leaching solution, corresponding downstream products are prepared, and the method is suitable for industrial production. The method realizes value maximization, does not generate secondary pollution, does not introduce fluorine, has low requirements on equipment, is simple in process and easy to operate, and makes up for the defects of the zinc replacement powder treatment process in the prior art.

The invention relates to composition and preparation of a thick-film copper conductor sintered at different temperatures and different atmospheres, and belongs to the field of chemical preparation. Comprising the following steps: mixing 65-85% of copper powder, 3.0%-15.0% of glass, 15.0%-35.0% of an organic adhesive and 0.1-1.5% of an additive which is one or more of titanium trioxide or stannous oxide, cuprous oxide and copper oxide, rolling into slurry, and sintering at 850-950 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The medium-temperature copper paste is prepared by the following steps: mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic adhesive and 0.2-1.6% of an additive which is one or more of titanium sesquioxide or stannous oxide, cuprous oxide and copper oxide, rolling into paste, and sintering at 450-650 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The low-temperature copper paste is prepared by mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic binder and 0.1-2.0% of an additive which can be one or more of elemental elements of magnesium, zinc, boron and phosphorus or one or more of nickel phosphide, nickel boride, copper phosphide and copper oxide, rolling the mixture into paste, and sintering the paste in air at 250-350 DEG C to obtain a copper conductor.

The invention provides a method for recovering copper and diluting matte converting slag through self-heating collaborative smelting, and relates to the field of metal recovery. The method comprises the steps that liquid copper matte converting slag generated in the copper smelting process is directly discharged into a hot-state collaborative smelting furnace, multi-source copper-based solid waste subjected to coarse crushing and mixing is added, collaborative smelting is carried out under the oxygen-enriched air condition, and collaborative smelting comprises the melting period, the dilution period and the standing period; in the melting period, copper, aluminum, iron, lead and tin in the copper-based solid waste are quickly melted to form first crude copper; in the depletion period, aluminum and iron in the first crude copper and organic matter in the copper-based solid waste serve as reducing agents to reduce oxides of copper, nickel, cobalt, zinc and lead in the matte converting slag into metal states, the metal states enter the first crude copper to form second crude copper, and after being oxidized, the iron and the aluminum enter the matte converting slag to form second slag; and in the standing period, a reducing agent is added, air blowing is ended, third crude copper and third slag are formed after standing, and a crude copper product is collected.

The invention relates to a filamentous-corrosion-resistant zinc-aluminum-magnesium coated steel plate and a preparation method thereof, and belongs to the technical field of metal surface modification. The steel plate comprises a zinc-aluminum-magnesium coating and a chemical conversion coating attached to at least part of the surface of the zinc-aluminum-magnesium coating, and the chemical conversion coating is formed by chemical reaction of chemical conversion liquid and the zinc-aluminum-magnesium coating. The components and content in the chemical conversion liquid are reasonably controlled, the chemical conversion liquid is coated on the surface of the zinc-aluminum-magnesium coating steel plate, and the chemical conversion liquid and the zinc-aluminum-magnesium coating are subjected to chemical reaction to form a compact, stable and corrosion-resistant chemical conversion film. And firm chemical bonding is formed between the chemical conversion film and the zinc-aluminum-magnesium coating steel plate, so that the whole coating system is more stable, invasion of corrosive media is effectively blocked, and the filiform corrosion resistance of the whole coating system is improved.

The invention relates to the technical field of metallurgy, in particular to a zinc-aluminum-magnesium coating preparation method capable of keeping coating integrity in a corrosion environment, alloy steel with the thickness of 1.8 mm or above is adopted, in the preparation process, a continuous annealing process adopts a three-section heating process, and an after-plating cooling process adopts a three-section variable-temperature cooling process; a plating solution adopted by the zinc-aluminum-magnesium plating layer comprises the following chemical components in percentage by weight: 9-11% of Al, 2.8-3.1% of Mg, less than or equal to 0.1% of rare earth elements, 0.1-0.2% of Si and the balance of Zn and inevitable impurities; according to the invention, the key problems of poor coating structure uniformity, contradiction between scratch resistance and self-repairing capability, limitation of super-thick coating preparation process, insufficient adaptability to extreme corrosion environment and the like of the existing zinc-aluminum-magnesium coating technology in industrial application are solved, and the coating can efficiently keep structural integrity in the industrial corrosion environment, and can be widely applied to the industrial corrosion environment. And meanwhile, the requirements of super-thick coating preparation, complex working condition adaptability and low-cost industrial production are met.

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 provides a method and a device for recovering valuable metals from copper smelting slag, and the method for recovering valuable metals from copper smelting slag comprises the following steps: before molten copper smelting slag is transferred into a slag ladle for cooling, adding first gas, gypsum slag and nitrogen into the molten copper smelting slag in a plasma injection mode, and after injection is completed, adding second gas into the slag ladle for cooling; and metal gaseous substances and copper slag are obtained. Carrying out post-treatment and flotation on the copper slag to obtain a valuable metal sulfonium phase and depleted slag; wherein the first gas is one or more of CO, H2, CO2 and CH4; and the metal gaseous substances comprise gaseous lead and gaseous zinc. And the valuable metal sulfonium phase is sulfides of copper, iron, lead and zinc. The process method and device are simple, the production time is shortened, CO2 emission can be reduced, secondary pollution caused by waste water and waste residues is avoided, and the green metallurgy requirement is met.

The invention relates to a high-corrosion-resistance and heat-resistance hot-dip galvanized alloy hot stamping steel component and a preparation method, and belongs to the technical field of component production. The hot stamping steel component comprises a steel base body and a plating layer attached to at least part of the surface of the steel base body. Wherein the steel matrix comprises the following chemical components in percentage by mass: 0.15%-0.35% of C, 0.1%-0.4% of Si, 2%-5% of Mn, less than or equal to 0.05% of P, less than or equal to 0.05% of S, 0.05%-0.2% of Al, 0.05%-0.2% of V, 0.05%-0.1% of Ti, less than or equal to 0.05% of N, 0.001%-0.004% of B and the balance of Fe and inevitable impurities; the plating layer comprises the following chemical components in percentage by mass: 5%-50% of Al, 0.5%-2% of Fe, 0.1%-5% of Si and the balance of Zn and inevitable impurities. Elements Al, Si and Fe are added into a zinc-based coating to form a metal inhibition layer, the inhibition layer cannot disappear in the hot stamping heating process, cracks can be inhibited from extending into a substrate in the stamping process, and therefore the problem of liquid metal embrittlement (LME) is effectively solved.

The invention belongs to the technical field of magnesium-zinc magnesium alloy surface treatment, and particularly relates to a method for in-situ growth of different blue ceramic film layers on the surface of a magnesium-zinc magnesium alloy. Comprising the following steps that the surface of a magnesium-zinc magnesium alloy sample is polished and cleaned, and then the surface of the sample is sequentially subjected to primary alkali washing, primary water washing, primary acid pickling, secondary water washing, secondary acid pickling, tertiary water washing and secondary alkali washing, so that the pretreated magnesium alloy is obtained; the pretreated magnesium alloy is placed in electrolyte for micro-arc oxidation treatment, and a blue ceramic film layer is generated on the surface of the magnesium alloy in situ; the electrolyte is formed by adding potassium fluotitanate and cobaltous sulfate into a silicate and phosphate composite electrolyte system; or the electrolyte is obtained by adding potassium fluotitanate into a phosphate electrolyte system. Different blue ceramic film layers are prepared, the ornamental value of the magnesium-zinc magnesium alloy component can be improved, and the visual effect is improved.

The invention belongs to the technical field of aluminum alloy material development, and particularly relates to a 6-series aluminum alloy material, an extruded profile and a preparation method and application of the 6-series aluminum alloy material and the extruded profile. The aluminum alloy material comprises the following elements in percentage by mass: 0.65-0.9% of Si (silicon); 0.85%-1.1% of Mg (magnesium); 0.5%-0.8% of Cu (copper); mn (manganese): 0.05%-0.18%; 0.05% to 0.15% of Cr (chromium); zn (zinc) is less than or equal to 0.1%; ti (titanium) is less than or equal to 0.1%; less than or equal to 0.15% of Fe (iron); and the balance of Al (aluminum) and inevitable impurities. The aluminum alloy material provided by the invention has excellent mechanical properties and corrosion resistance, has remarkable advantages in the aspects of high strength, light weight, processability and cost control compared with a conventional 6-series aluminum alloy, and is particularly suitable for being applied to severe environments, such as offshore photovoltaic module structural members, photovoltaic modules, photovoltaic modules, photovoltaic modules, photovoltaic modules, photovoltaic modules, photovoltaic modules and the like. The material consumption can be effectively reduced, the service life is prolonged, and the maintenance cost is reduced.

The invention relates to the technical field of lead-zinc ore beneficiation, in particular to a lead-zinc ore dense medium grading selection-flotation combined separation system and a separation process, and the system comprises a dense medium separation system and a flotation system. The dense medium separation system comprises a crushing and screening unit, a dense medium coarse fraction separation unit, a dense medium fine fraction separation unit and a fine ore water treatment unit, an outlet of the crushing and screening unit is divided into a coarse fraction outlet, a fine fraction outlet and a fine ore outlet, the coarse fraction outlet is connected with the dense medium coarse fraction separation unit, and the fine fraction outlet is connected with the fine ore water treatment unit; the fine fraction outlet is connected with the dense medium fine fraction separation system, the fine ore outlet is connected with the fine ore water treatment unit, and a coarse fraction gravity concentration concentrate outlet of the dense medium coarse fraction separation unit, a fine fraction gravity concentration concentrate outlet of the dense medium fine fraction separation unit and a concentrated fine ore outlet of the fine ore water treatment unit are connected with the flotation system. The method has the advantages of high economic benefit, low production cost, energy conservation, environment friendliness and the like, and the lead-zinc ore dressing efficiency and the metal recovery rate are effectively improved.

The invention discloses a high-temperature-resistant and corrosion-resistant aluminum alloy material and a preparation process thereof, and relates to the technical field of aluminum alloy materials. The high-temperature-resistant and corrosion-resistant aluminum alloy material is prepared by carrying out micro-arc oxidation treatment on aluminum alloy, carrying out plasma spraying on a corrosion-resistant spray coating and carrying out heat treatment. The aluminum alloy comprises the following raw material components in percentage by weight: 0.05%-0.15% of silicon, 0.1%-0.2% of iron, 1.2%-1.5% of copper, 0.7%-0.9% of manganese, 2.5%-3.8% of magnesium, 10.2%-12.4% of zinc, 0.02%-0.04% of titanium, 0.08%-0.15% of zirconium, 0.2%-0.4% of scandium, 0.5%-0.8% of silicon nitride whiskers, 0.5%-1% of an aluminum-coated graphene material and the balance of aluminum.

The invention provides a method for recycling valuable substances and cyanide in cyanide-containing wastewater, and belongs to the technical field of cyanide-containing wastewater treatment. The method comprises the following steps: firstly, carrying out replacement reaction on a physicochemical material (reducing substance zinc) and a copper-cyanogen complex in the cyanogen-containing wastewater to displace copper, and filtering to obtain filter residues containing zinc and copper, so as to realize copper recovery; in the replacement reaction, the copper-cyanogen complex in the filtrate is converted into a zinc-cyanogen complex with a lower stability constant, and then the zinc in the filtrate is recycled by diaphragm electrolysis. The method specifically comprises the following steps: dividing an electrolytic cell into a cathode region and an anode region by utilizing a membrane material, and enabling electrode reactions to be independently carried out, so that cyanide is prevented from entering the anode region to generate electrochemical oxidation and the decomposition of the cyanide is inhibited, and the cyanide is recycled in a solution for cyclic utilization; and then an alkali-resistant titanium-based coating electrode is used as an anode plate, a porous material is used as a cathode plate, recovery of zinc on the cathode plate is promoted, and recovery of valuable metal zinc and copper and cyclic utilization of cyanide are achieved.

The invention provides a resourceful treatment method for a solution containing copper, manganese and zinc. The resourceful treatment method comprises a process of replacing copper with manganese, a process of extracting zinc and a process of extracting manganese. In the resourceful treatment method, the manganese powder is used for replacing copper in the solution containing copper, manganese and zinc, effective separation of copper, manganese and zinc can be achieved, the copper content in the product replacement liquid is reduced, and meanwhile introduction of impurity ions is avoided. Besides, the extraction process is adopted to separate zinc and manganese, the separation efficiency is high, the zinc and manganese containing solution obtained through extraction is high in purity and low in impurity content and can be directly used as a raw material of the downstream industry, waste water generated in the extraction process is easy to treat and can be reused after being treated, and therefore cost can be saved, and pollution to the environment can be reduced.

The invention relates to the technical field of precious metal recovery, in particular to a process for separating precious metal from copper-nickel smelting waste, which comprises the following steps: crushing and grading the waste, adding a sulfuric acid solution containing etidronic acid, leaching, and washing, drying and crushing filter residues to obtain a pretreated material; mixing the pretreated material with a sodium peroxide-sodium carbonate composite flux, roasting, leaching with water, and filtering to obtain a filter residue B; adding a leaching agent containing hydrochloric acid, sodium chlorate and 1, 2-cyclohexanediamine tetraacetic acid into the filter residue B according to the ratio of 1: 3-1: 5, and filtering to obtain filtrate C and filter residue C; adjusting the pH value of the filtrate C to 1.5-2.5, adding an ethanol solution of sodium N, N-diethyldithiocarbamate, precipitating, washing and calcining to obtain sponge palladium; adding ammonium chloride into the filtrate D, precipitating and calcining to obtain sponge platinum; and leaching the filter residue C by using a hydrochloric acid-chloroauric acid mixed solution containing diphenylthiourea, and replacing and calcining zinc powder to obtain crude gold. According to the process, the leaching rates of platinum, palladium and gold and the product purity are greatly improved; flux and reagent systems are optimized, consumption and energy consumption are reduced, waste liquid treatment is matched for up-to-standard discharge, and efficient resource recovery and environment-friendly cooperation are achieved.

The invention discloses a high-toughness corrosion-resistant semi-solid injection molding magnesium alloy and a preparation method thereof, and belongs to the technical field of metal materials. The magnesium alloy comprises the following chemical components in percentage by weight: 8.6 to 11 percent of aluminum, 0.5 to 1 percent of zinc, 0.05 to 0.4 percent of manganese, 0.05 to 0.2 percent of calcium, 0.6 to 2 percent of rare earth element RE and the balance of magnesium and inevitable impurities. The preparation method of the alloy comprises the following steps: (1) adding raw materials according to the component proportion, smelting into magnesium alloy melt, pouring into a mold, and molding to obtain a magnesium alloy ingot; (2) cutting the cast ingot into magnesium alloy semi-solid blank particles; (3) performing injection molding to obtain a molded part; (4) solid solution heat treatment; and (5) performing two-stage aging heat treatment. The magnesium alloy has high toughness and corrosion resistance, and is suitable for semi-solid injection molding. The forming process can achieve near-net forming of complex components, and castings are few in defect, compact in structure and wide in application prospect.

The invention relates to the technical field of novel environment-friendly materials, in particular to a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure and a preparation method of the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure, and the preparation method of the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure comprises the following steps: step 1, preparing a zinc-iron salt mixed solution; preparing an alkaline mixed solution; step 2, dropwise adding the alkaline mixed solution prepared in the step 1 into the zinc-iron salt mixed solution while stirring, and adjusting the pH value to 9-10; then carrying out a water bath reaction to obtain a zinc iron-double metal hydroxide; 3, the zinc iron-bimetal hydroxide prepared in the step 2 is subjected to high-temperature calcination, and the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure is obtained.The zinc iron-bimetal hydroxide (ZnFe-LDH) serves as a raw material, under the high-temperature calcination condition, the ZnFe-LDH is decomposed to generate ZnO and Fe2O3, then the ZnO and the Fe2O3 are further subjected to a solid-phase reaction to generate ZnFe2O4 (excessive ZnO), and the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure is obtained. And finally, the ZnO / ZnFe2O4 desulfurization composite adsorption material is prepared.

The invention relates to the technical field of ceramic glaze preparation, in particular to a formula of ceramic glaze, which comprises the following components in percentage by mass: 25-30% of modified zircon sand; 20 to 25% of spodumene; 15 to 20 percent of nano aluminum oxide; 10 to 15% of petalite; 8-12% of kaolin; 3-5% of a silver-loaded zeolite antibacterial agent; 5-8% of boron carbide-silicon nitride composite powder; 2-3% of zinc borate; and 10-15% of a composite frit. A three-dimensional grid structure (the Vickers hardness is greater than or equal to 1800 HV) is formed through boron carbide-silicon nitride composite powder, and the wear resistance is improved by 40% in combination with a potassium feldspar modification technology; the silver-loaded zeolite realizes slow release of Ag, the antibacterial rate is greater than 99.9%, a gradient sintering process enables a glaze layer to form a gradient density structure, the porosity of a surface layer is less than 0.5%, the porosity of a bottom layer is 3-5%, the oxidation defect of the copper red glaze is avoided through CO / N atmosphere control, and the color development uniformity delta E is less than or equal to 0.8; the firing temperature is reduced by 150 DEG C, and the energy consumption is reduced.

The invention discloses a preparation method of chromium-free fingerprint-resistant liquid for an aluminized zinc plate, and relates to the technical field of metal surface treatment materials.The preparation method comprises the steps that a benzotriazole-cerium molybdate composite corrosion inhibition system is constructed, and multiple layers of adsorption films are formed through intermolecular pi-pi accumulation and rare earth ion coordination; meanwhile, a graphene oxide / nano silicon dioxide synergistic enhancement system is introduced, graphene sheet layers are directionally arranged to form a physical barrier, and micropores are filled with nano particles to improve compactness; and meanwhile, a lanthanide rare earth compound is adopted for modifying the flash-rust inhibitor, the stability of a passivation film on the metal surface is enhanced through the empty orbital characteristic of rare earth elements, the nanometer material gradient dispersion technology is combined with the ultrasonic-mechanical coupling dispersion technology, filler uniform distribution and interface bonding strengthening are achieved, and the fingerprint resistance, corrosion resistance and the like of the film layer are effectively guaranteed.

According to the lead-zinc ore sorting method and the electronic equipment, in the preprocessing stage, an obtained raw ore high-energy diagram is registered with a low-energy diagram as the benchmark, physical response difference measurement is adopted, the low-energy diagram and the registered high-energy diagram are fused to obtain a fusion diagram, the fusion diagram is colored according to a color transition rule, a pseudo-color diagram is obtained, and a lead-zinc ore sorting result is obtained. And the pseudo-color image is used as input, and a target detection model based on deep learning is used for processing, so that accurate and efficient recognition of the lead-zinc ore in the raw ore is realized.