3001 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 discloses a method and a device for growing a cadmium zinc telluride single crystal, and is characterized in that the method comprises the following steps: (1) putting a cadmium zinc telluride polycrystal ingot into a pyrolytic boron nitride crucible, the cadmium zinc telluride polycrystal ingot is obtained by a preset temperature gradient synthesis method, and has [111] crystal orientation cluster crystal grains in the growth direction; (2) putting the pyrolytic boron nitride crucible into a vacuum closed quartz container, controlling a six-temperature-zone growth furnace through a computer to complete the melting process of a polycrystalline material, and before formal growth, forming a solid-liquid interface distribution structure in which polycrystals are not melted and the rest parts are completely melted at the center of the bottom, wherein the diameter of the solid-liquid interface distribution structure is not less than 30mm; (3) after heat preservation is conducted for a preset time, two-step cooling is achieved in a VGF mode; in the first cooling stage, an initial temperature gradient is formed, and after heat preservation is conducted for a preset time, elimination, merging and growth of [111] crystal nuclei are completed; in the second cooling stage, stable and continuous propulsion of a solid-liquid interface is completed, and continuous growth of single crystals is achieved; and finally, cooling to room temperature to obtain the cadmium zinc telluride single crystal. According to the method, the effect of growing the cadmium zinc telluride crystal with high single crystal rate under the seed crystal-free condition is realized.

The invention discloses a method for preparing a high-entropy spinel type oxide material through microwave hydrothermal treatment and a product and application of the high-entropy spinel type oxide material, and belongs to the technical field of material science and chemical engineering.The method comprises the following steps that six metal sources of iron, cobalt, nickel, chromium, zinc and copper are dissolved in water according to the metal ion equimolar ratio and stirred to be uniform, and a mixed solution is obtained; adding a precipitator into the mixed solution, and then sequentially carrying out microwave hydrothermal treatment, cooling, washing, centrifuging, drying and calcining treatment to obtain the high-entropy spinel type oxide material (FeCoNiCrZnCu) 3O4. According to the invention, the spinel type oxide is subjected to high-entropy design, and the high-entropy spinel material with excellent water electrolysis catalytic performance is synthesized. On one hand, the raw material for synthesizing the material is relatively cheap transition metal nitrate, the source is wide, and the cost is low; and on the other hand, the microwave hydrothermal method can efficiently synthesize the high-entropy spinel material under mild reaction conditions, and has the characteristics of greenness and environmental protection.

The invention relates to the technical field of welding, in particular to a lead-free solder composition and a preparation method thereof. The composition comprises brazing filler metal and a brazing flux, wherein the brazing filler metal comprises 55 to 65 parts of copper, 30 to 40 parts of zinc, 0.5 to 1 part of silver, 0.1 to 1 part of tin, 0.1 to 0.5 part of nickel, 0.02 to 0.15 part of lanthanum, 0.03 to 0.15 part of cerium and 0.05 to 0.2 part of indium; the brazing flux comprises 18-22 parts of borax, 13-17 parts of boric acid, 25-32 parts of a potassium fluoride and potassium fluoborate compound, 3-5 parts of calcium fluoride, 12-16 parts of aluminum oxide and 8-11 parts of magnesium oxide. The lead-free solder composition does not contain toxic lead elements, pollution to the environment and the ecological system is little, the wettability, corrosion resistance, strength, stability and the like of the lead-free solder composition are improved, and the welding quality is comprehensively improved. According to the preparation method, uniform distribution and accurate control of the brazing filler metal and the brazing flux are guaranteed, stability and consistency of product quality are guaranteed, and the preparation method is easy and convenient to operate and suitable for mass production.

The invention discloses a lead-tin separation method in a tin soot wet recovery process, which is used for lead-tin separation in slag charge after zinc and copper recovery of tin soot, and comprises the following steps: lead immersion: adding tin-lead mixed slag charge into prepared saturated chlorine-containing salt water to dissolve lead in the chlorine-containing salt water to obtain lead chloride salt water and tin sludge, thereby realizing lead-tin separation; the obtained tin mud is sold as a product; and lead removal: slaked lime is added into lead chloride saline water, lead slime and chlorine-containing saline water are obtained after the reaction is completed, the chlorine-containing saline water is returned to the lead dipping procedure, and the obtained lead slime can be sold as a byproduct. According to the method, tin and lead are effectively separated from the slag obtained after zinc and copper recovery of the tin soot is completed through a chemical method, the method is simple and easy to operate, the raw material cost is low, the grade of a tin sludge product is improved, meanwhile, a lead by-product is produced, and therefore the economic benefit of tin soot wet recovery is improved; and the whole process of lead-tin separation does not generate waste water, waste residues and waste gas, is environment-friendly and is worthy of popularization and application.

The invention provides multi-element alloy silver-free copper-based brazing filler metal and a preparation method thereof.The brazing filler metal comprises, by mass, 30%-40% of zinc, 4%-11% of manganese, 1%-4% of tin, 0.2%-0.6% of silicon, 0.2%-1% of rare earth elements and the balance copper, the rare earth elements comprise cerium, praseodymium and rhenium, and the mass ratio of cerium to praseodymium to rhenium is (0.8-1.2): (0.8-1.2): (0.6-1.0). According to the multi-element alloy silver-free copper-based brazing filler metal, the performance of a brazed joint is improved, the strength, toughness, fatigue resistance and the like of the joint are improved, and the reliability and stability of connection under various working conditions are ensured.

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.

Provided is a negative thermal expansion material having excellent negative thermal expansion properties and exhibiting a gradual volume decrease with increasing temperature compared with the conventional zinc-phosphorus complex oxide Zn2P2O7 in a temperature range of 100-150°C.　 The negative thermal expansion material is characterized by comprising a zinc-phosphorus complex oxide represented by general formula (1). (1): ZnxCayMpPzOt (In the formula, M represents one or more metal elements selected from among Mg, Zn, Cu, Fe, Cr, Mn, Ni, V, Li, Al, B, Na, K, F, Cl, Br, I, Sr, Ba, Ti, Zr, Hf, Nb, Ta, Y, Yb, Si, S, W, Mo, Co, Bi, Te, Pb, Ag, Cd, In, Sn, Sb, Te, Ga, Ge, La, Ce, Nd, Sm, Eu, Tb, Dy, and Ho; 0<x<2.00; 0<y<2.00; 0≤p≤1.00; 1.70≤z≤2.30; and 6.00≤t≤8.00, provided that 1.70≤x+y+p≤2.30)

A method for recovering heavy metals and soluble chlorine salts from fly ash generated by incineration of domestic waste. The method comprises the following steps: first, mixing fly ash with water and an acid, performing a leaching reaction when a pH value is controlled, improving the leaching efficiency of lead and zinc by means of air agitation, and measuring dissolved oxygen or redox potential to determine a leaching reaction endpoint; second, using a vulcanizing agent to recover leached heavy metals, and adjusting and monitoring the pH value of a leachate so as to control the adding amount of the vulcanizing agent; third, adding an alkali to adjust the pH value of the leachate so as to precipitate impurities such as aluminum and iron, and using an excessive amount of the vulcanizing agent to further remove heavy metals; and finally, adding an oxidizing agent and an iron salt coagulant into the leachate from which the heavy metals and impurities are removed, so as to remove divalent sulfur and arsenic, wherein the finally purified leachate can be used for recovering soluble chlorine salts. The method has a simple and efficient process, can significantly increase the recovery rate of heavy metals, and recovers heavy metals in the form of metal sulfides, thus facilitating subsequent separation treatment. The treated fly ash can be used as a raw material of cement, thus achieving efficient utilization of resources.

The invention discloses a high-strength 7xxx series aluminum alloy capable of being anodized and a preparation method thereof. The high-strength 7xxx series aluminum alloy capable of being anodized comprises the following components: less than 0.07% of silicon, less than or equal to 0.12% of iron, 1.2-1.6% of copper, 0.07-0.17% of manganese, 2.10-2.40% of magnesium, 0.003-0.012% of zirconium, 6.2-6.5% of zinc, less than or equal to 0.003-0.020% of titanium and the balance of aluminum and other inevitable impurity elements. The preparation method of the high-strength 7xxx series aluminum alloy capable of being anodized comprises the steps of smelting and casting, homogenizing treatment, hot extrusion and heat treatment and anodizing treatment. A 7xxx series aluminum alloy product prepared through the preparation method has good intergranular corrosion and exfoliation corrosion performance; according to the alloy performance, the tensile strength is larger than or equal to 480 MPa, the yield strength is larger than or equal to 450 MPa, and the ductility is larger than or equal to 9%; in the grain sizes of the profile, the average grain size is less than or equal to 150 microns, and the maximum grain size is less than or equal to 250 microns; and after anodic oxidation treatment, the polishing glossiness is larger than 450 GU, more obvious advantages are achieved, and the good market prospect is achieved.

The invention relates to the technical field of zinc powder processing equipment, in particular to a multi-stage grinding system for preparing high-purity zinc powder, which comprises a primary grinding unit, a secondary grinding unit, a tertiary fine grinding unit, a separating and screening unit, a collecting unit, a cooling system and a control system, crushing larger zinc particles into a preset coarse particle size; and the secondary grinding unit is a ball mill and is used for further grinding the zinc powder subjected to primary grinding to ensure that particles reach a medium particle size range. According to the multi-stage grinding system, through automation, multi-stage smashing and real-time feedback control, efficient production of zinc powder is achieved, and it is guaranteed that the particle size of the zinc powder is uniform, and the purity of the zinc powder is high. A system integrated cooling mechanism prevents oxidation, a separation screening unit improves screening efficiency, and a sealed conveying device ensures environmental protection and safety. Overall automation improves production efficiency and is suitable for large-scale industrial application.

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 discloses a method for preparing 6N high-purity zinc, comprising the following steps: S1, alkali dissolution: dissolving electro zinc with sodium hydroxide, filtering after the reaction is completed; S2, acidification: adding hydrochloric acid to the filtered solution for acidification; S3, evaporation concentration: putting the acidified solution into an evaporating kettle for evaporation concentration; S4, freezing crystallization: filtering and drying the concentrated solution after cooling in a freezing tank; S5, secondary dissolution: dissolving the dried zinc chloride solid in an ether solution at room temperature, filtering; S6, vacuum distillation: putting the filtered ether solution into a vacuum distillation device, S7, heating and decomposing; S8, vacuum distillation. This method can achieve the purpose of preparing 6N high-purity zinc from electro zinc, and realize the low-cost recycling of zinc resources; at the same time, the alkali dissolution-acidification-ether secondary dissolution process can be used to effectively separate metals such as cadmium with a segregation coefficient close to 1 in zinc, which is convenient for the rear-end pyrometallurgical method to purify 6N high-purity zinc.

The invention belongs to the field of material processing, and discloses a method for preparing microalloyed AZ31 magnesium alloy by ultrasonic treatment, which comprises the following steps: melting magnesium at 715-725 DEG C, keeping the temperature for 5-8 minutes, then heating to 725-735 DEG C, then adding Mg-50% Al intermediate alloy, after Mg-50% Al is completely melted, keeping the temperature for 8-12 minutes, slagging off, stirring to completely dissolve Mg-50% Al, continuously keeping the temperature at 725-735 DEG C, adding pure zinc, and stirring to obtain the microalloyed AZ31 magnesium alloy. After the pure zinc is completely molten, carrying out heat preservation for 8-12 minutes, then carrying out slagging-off and stirring to completely dissolve the pure zinc, finally adding Mg-30% Ca and Mg-30% Ce intermediate alloys, carrying out heat preservation for 8-12 minutes, and carrying out stirring to completely dissolve the Mg-30% Ca and Mg-30% Ce intermediate alloys to obtain an alloy melt; the alloy melt is cooled to 655-665 DEG C, heat preservation is conducted for 20-25 minutes, then an ultrasonic treatment tool head stretches into the position 18-22 mm below the liquid level of the alloy melt for ultrasonic treatment, the ultrasonic treatment power is 300-700 W, and the treatment time is 60-120 seconds; and casting and molding under a protective atmosphere to obtain a casting blank. According to the method, the problem of slow diffusion in the casting process is solved through ultrasonic treatment, the structure is homogenized, and the strength of the structure is obviously enhanced.

The invention discloses a diffusion source for a neodymium-iron-boron magnet, a preparation method of the diffusion source and a treatment method of the magnet. The diffusion source comprises copper or copper alloy foil and attachments, the attachments are attached to the upper surface and the lower surface of the copper or copper alloy foil respectively, and the attachments comprise rare earth particles, non-rare earth oxide and non-rare earth metal or alloy; the rare earth elements in the rare earth particles are selected from one or more of terbium, dysprosium, praseodymium and neodymium and contain at least one of terbium and dysprosium; the non-rare earth oxide is selected from one or more of aluminum oxide and magnesium oxide; the non-rare earth element in the non-rare earth metal or alloy is selected from one or more of copper, aluminum, magnesium, iron, zirconium, niobium, gallium, zinc, cobalt and silicon, and the non-rare earth metal or alloy contains at least one of copper and aluminum. The diffusion source can effectively improve the coercive force of the neodymium-iron-boron magnet.

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 corrosion-resistant neodymium-iron-boron magnet and a preparation method, and belongs to the technical field of neodymium-iron-boron magnets, and the preparation method of the corrosion-resistant neodymium-iron-boron magnet is characterized by comprising the following steps: S1, uniformly mixing neodymium-iron-boron powder obtained by jet milling with alloy nano-powder, and sieving to obtain a mixed material, wherein the adding amount of the alloy nanometer powder is 0.2-0.8% of the weight of the neodymium iron boron powder; s2, compression molding: carrying out compression molding and oil isostatic pressing on the mixed material to obtain a pressed blank; s3, sintering molding: sintering the pressed blank to obtain a neodymium-iron-boron magnet; s4, carrying out pretreatment on the neodymium-iron-boron magnet; and S5, preparing a coating solution, stirring and mixing silane, a solvent and water according to the weight ratio of 1: (0.8-1.2): (2.2-2.8) to prepare a silane hydrolysate, then adding zinc and aluminum sheet-shaped powder, uniformly stirring and mixing, spraying, and drying to obtain the corrosion-resistant neodymium-iron-boron magnet, thereby achieving the effect of improving the corrosion resistance of the neodymium-iron-boron magnet.

The invention discloses a low-loss manganese-zinc soft magnetic ferrite material suitable for wide frequency and wide temperature and a preparation method thereof, the material comprises the following main components in percentage by mass: 71.25%-71.5% of Fe2O3, 6.0%-7.5% of ZnO and the balance of MnO; the additive is prepared from the following components in percentage by mass: 0.4 percent to 0.5 percent of Co3O4 and 0.07 percent to 0.11 percent of SnO2; the raw materials comprise, by weight, 0.004%-0.008% of SiO2, 0.03%-0.04% of CaCO3 and 0.01%-0.02% of ZrO2; and 0.02% to 0.03% of Nb2O5. According to the present invention, the main component raw materials are subjected to pre-sintering, coarse crushing, sand grinding and fine crushing after the additive is added, spray granulation, and sintering in the nitrogen and oxygen mixed atmosphere, such that the wide frequency, wide temperature and low loss of the manganese zinc ferrite material are achieved, and the application prospect is good when the manganese zinc ferrite material is used for the low-loss electronic transformer.

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 belongs to the technical field of electrode material modification, and particularly relates to a method for constructing a metal zinc negative electrode surface protection layer through one-step heating and application. The method comprises the following steps: cleaning the surface of a commercial zinc electrode, heating in an inert gas atmosphere, cooling, and taking out the commercial zinc electrode to obtain the modified zinc negative electrode material. According to the method, copper impurities originally existing in the commercial zinc electrode are creatively utilized, internal copper atoms have diffusivity through thermal activation, meanwhile, the copper atoms are induced to be diffused to the surface through attraction force of oxygen anions from the surface layer of the commercial zinc electrode, finally, the surface layer rich in copper is formed, and under the action of the surface layer, the surface layer rich in copper is formed. The deposited zinc is dendrite-free, dense, uniform and has a (101) orientation. Meanwhile, in the preparation process, additional additives are not needed, operation is easy, and the method has the advantages of being low in cost, high in efficiency and free of pollution and has the industrialization prospect.

The invention discloses a method for comprehensively treating zinc-containing sulfuric acid slag and blast furnace cloth bag ash, which comprises the following steps of: uniformly mixing the zinc-containing sulfuric acid slag, the blast furnace cloth bag ash, a calcium additive and a carbonaceous reducing agent according to the weight ratio of 10: (3-5): (2.5-4): (1.5-3); smoke dust generated by roasting is subjected to oxidation dust removal, cooling separation and desulfurization treatment, and zinc-containing oxide, sulfuric acid and sulfite are obtained; and cooling the roasted material with water, crushing and grinding, and sequentially carrying out high-intensity magnetic separation and low-intensity magnetic separation to obtain high-valued reduced iron powder. The final iron grade can reach 95% or above, and the content of sulfur and zinc is lower than 0.1%. According to the method, the industrial solid waste sulfuric acid slag and the blast furnace cloth bag ash can be converted into the high-valued reduced iron powder, comprehensive recycling of resources is achieved, and environmental and soil pollution caused by stacking is avoided.

The invention discloses an online monitoring management method and system for the complete cycle of carbon, iron and zinc separation of blast furnace bag-type dedusting ash, and relates to the technical field of dedusting control, the method comprises the following steps: dividing the complete cycle of the carbon, iron and zinc separation process of the blast furnace bag-type dedusting ash into a plurality of separation stages, and sequentially executing automatic monitoring of each separation stage, and according to the stage monitoring index set, carrying out separation state evaluation of the current stage, if a stage separation evaluation result is qualified, entering the next separation stage, and if the stage separation evaluation result is unqualified, carrying out separation compensation calculation, and carrying out carbon-iron-zinc separation regulation and control according to a separation compensation strategy. The technical problems that in the prior art, real-time regulation and control means are lacked, separation deviation is difficult to correct rapidly, and the blast furnace cloth bag dedusting ash carbon-iron-zinc separation efficiency and the resource recovery rate are affected are solved, and the technical effect that the blast furnace cloth bag dedusting ash carbon-iron-zinc separation efficiency and the resource recovery rate are improved through staged real-time monitoring and dynamic regulation and control is achieved.

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 utility model discloses a galvanized cylinder inner wall slag removal device which comprises a main body assembly, a slag removal assembly and a slag removal assembly. The deslagging assembly comprises a workbench, a group of mounting plates, an air pump and a moving rod; the workbench is fixed to the top end of the supporting frame, the mounting plates are fixed to one side of the top end of the workbench, the air pump is fixed between the mounting plates, and the moving rod is slidably connected into one end of the air pump. The problems that in the existing galvanizing process, due to the fact that welding needs to be convenient, the front end of the inner wall of a galvanized round pipe does not need to be galvanized, in hot-melted zinc ions, due to the fact that the surface of a steel pipe and the zinc ions generate chemical reaction, the non-galvanized part accumulates part of slag materials in the process, if cleaning is not conducted in time, more and more zinc liquid is generated on the inner wall of a cylinder, and the slag materials are wasted are solved. And the use effect of the steel pipe is affected.